1 /**
2 * Granch SBNI16 G.SHDSL Modem driver
3 * Written by Denis I. Timofeev, 2002-2003.
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 * $FreeBSD: src/sys/dev/sbsh/if_sbsh.c,v 1.3.2.1 2003/04/15 18:15:07 fjoe Exp $
27 */
28
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/sockio.h>
32 #include <sys/mbuf.h>
33 #include <sys/malloc.h>
34 #include <sys/kernel.h>
35 #include <sys/proc.h>
36 #include <sys/priv.h>
37 #include <sys/socket.h>
38 #include <sys/random.h>
39 #include <sys/serialize.h>
40 #include <sys/bus.h>
41 #include <sys/rman.h>
42 #include <sys/thread2.h>
43 #include <sys/interrupt.h>
44
45 #include <net/if.h>
46 #include <net/ifq_var.h>
47 #include <net/if_arp.h>
48 #include <net/ethernet.h>
49 #include <net/if_media.h>
50
51 #include <net/bpf.h>
52
53 #include <vm/vm.h>
54 #include <vm/pmap.h>
55
56 #include <bus/pci/pcireg.h>
57 #include <bus/pci/pcivar.h>
58
59 #include "if_sbshreg.h"
60
61 /* -------------------------------------------------------------------------- */
62
63 struct sbni16_hw_regs {
64 u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR;
65 };
66
67 struct hw_descr {
68 u_int32_t address;
69 u_int32_t length;
70 };
71
72 struct cx28975_cmdarea {
73 u_int8_t intr_host;
74 u_int8_t intr_8051;
75 u_int8_t map_version;
76
77 u_int8_t in_dest;
78 u_int8_t in_opcode;
79 u_int8_t in_zero;
80 u_int8_t in_length;
81 u_int8_t in_csum;
82 u_int8_t in_data[75];
83 u_int8_t in_datasum;
84
85 u_int8_t out_dest;
86 u_int8_t out_opcode;
87 u_int8_t out_ack;
88 u_int8_t out_length;
89 u_int8_t out_csum;
90 u_int8_t out_data[75];
91 u_int8_t out_datasum;
92 };
93
94 #define XQLEN 8
95 #define RQLEN 8
96
97 struct sbsh_softc {
98 struct arpcom arpcom; /* ethernet common */
99
100 struct resource *mem_res;
101 struct resource *irq_res;
102 void *intr_hand;
103
104 void *mem_base; /* mapped memory address */
105
106 volatile struct sbni16_hw_regs *regs;
107 volatile struct hw_descr *tbd;
108 volatile struct hw_descr *rbd;
109 volatile struct cx28975_cmdarea *cmdp;
110
111 /* SBNI16 controller statistics */
112 struct sbni16_stats {
113 u_int32_t sent_pkts, rcvd_pkts;
114 u_int32_t crc_errs, ufl_errs, ofl_errs, attempts, last_time;
115 } in_stats;
116
117 /* transmit and reception queues */
118 struct mbuf *xq[XQLEN], *rq[RQLEN];
119 unsigned head_xq, tail_xq, head_rq, tail_rq;
120
121 /* the descriptors mapped onto the first buffers in xq and rq */
122 unsigned head_tdesc, head_rdesc;
123 u_int8_t state;
124 };
125
126 struct cx28975_cfg {
127 u_int8_t *firmw_image;
128 u_int32_t firmw_len;
129 u_int32_t lrate: 10;
130 u_int32_t master: 1;
131 u_int32_t mod: 2;
132 u_int32_t crc16: 1;
133 u_int32_t fill_7e: 1;
134 u_int32_t inv: 1;
135 u_int32_t rburst: 1;
136 u_int32_t wburst: 1;
137 u_int32_t : 14;
138 };
139
140 /* SHDSL transceiver statistics */
141 struct dsl_stats {
142 u_int8_t status_1, status_3;
143 u_int8_t attenuat, nmr, tpbo, rpbo;
144 u_int16_t losw, segd, crc, sega, losd;
145 };
146
147 enum State { NOT_LOADED, DOWN, ACTIVATION, ACTIVE };
148
149 #define SIOCLOADFIRMW _IOWR('i', 67, struct ifreq)
150 #define SIOCGETSTATS _IOWR('i', 68, struct ifreq)
151 #define SIOCCLRSTATS _IOWR('i', 69, struct ifreq)
152
153 static int sbsh_probe(device_t);
154 static int sbsh_attach(device_t);
155 static int sbsh_detach(device_t);
156 static int sbsh_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
157 static void sbsh_shutdown(device_t);
158 static int sbsh_suspend(device_t);
159 static int sbsh_resume(device_t);
160 static void sbsh_watchdog(struct ifnet *);
161
162 static void sbsh_start(struct ifnet *, struct ifaltq_subque *);
163 static void sbsh_init(void *);
164 static void sbsh_stop(struct sbsh_softc *);
165 static void init_card(struct sbsh_softc *);
166 static void sbsh_intr(void *);
167 static void resume_tx(struct sbsh_softc *);
168 static void start_xmit_frames(struct sbsh_softc *);
169 static void encap_frame(struct sbsh_softc *, struct mbuf *);
170 static struct mbuf * repack(struct sbsh_softc *, struct mbuf *);
171 static void free_sent_buffers(struct sbsh_softc *);
172 static void alloc_rx_buffers(struct sbsh_softc *);
173 static void indicate_frames(struct sbsh_softc *);
174 static void drop_queues(struct sbsh_softc *);
175 static void activate(struct sbsh_softc *);
176 static void deactivate(struct sbsh_softc *);
177 static void cx28975_interrupt(struct sbsh_softc *);
178 static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg);
179 static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t);
180 static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t,
181 u_int8_t *, u_int8_t);
182
183 static device_method_t sbsh_methods[] = {
184 /* Device interface */
185 DEVMETHOD(device_probe, sbsh_probe),
186 DEVMETHOD(device_attach, sbsh_attach),
187 DEVMETHOD(device_detach, sbsh_detach),
188 DEVMETHOD(device_shutdown, sbsh_shutdown),
189 DEVMETHOD(device_suspend, sbsh_suspend),
190 DEVMETHOD(device_resume, sbsh_resume),
191
192 DEVMETHOD_END
193 };
194
195 static driver_t sbsh_driver = {
196 "sbsh",
197 sbsh_methods,
198 sizeof(struct sbsh_softc)
199 };
200
201 static devclass_t sbsh_devclass;
202
203 DECLARE_DUMMY_MODULE(if_sbsh);
204 DRIVER_MODULE(if_sbsh, pci, sbsh_driver, sbsh_devclass, NULL, NULL);
205
206 static int
207 sbsh_probe(device_t dev)
208 {
209 if (pci_get_vendor(dev) != SBNI16_VENDOR
210 || pci_get_device(dev) != SBNI16_DEVICE
211 || pci_get_subdevice(dev) != SBNI16_SUBDEV)
212 return (ENXIO);
213
214 device_set_desc(dev, "Granch SBNI16 G.SHDSL Modem");
215 return (0);
216 }
217
218 static int
219 sbsh_attach(device_t dev)
220 {
221 struct sbsh_softc *sc;
222 struct ifnet *ifp;
223 int unit, error = 0, rid;
224
225 sc = device_get_softc(dev);
226 unit = device_get_unit(dev);
227
228 rid = PCIR_MAPS + 4;
229 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
230 0, ~0, 4096, RF_ACTIVE);
231
232 if (sc->mem_res == NULL) {
233 kprintf ("sbsh%d: couldn't map memory\n", unit);
234 error = ENXIO;
235 goto fail;
236 }
237
238 rid = 0;
239 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
240 RF_SHAREABLE | RF_ACTIVE);
241
242 if (sc->irq_res == NULL) {
243 kprintf("sbsh%d: couldn't map interrupt\n", unit);
244 error = ENXIO;
245 goto fail;
246 }
247
248 sc->mem_base = rman_get_virtual(sc->mem_res);
249 init_card(sc);
250 /* generate ethernet MAC address */
251 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192);
252 read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2);
253
254 ifp = &sc->arpcom.ac_if;
255 ifp->if_softc = sc;
256 if_initname(ifp, "sbsh", unit);
257 ifp->if_mtu = ETHERMTU;
258 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
259 ifp->if_ioctl = sbsh_ioctl;
260 ifp->if_start = sbsh_start;
261 ifp->if_watchdog = sbsh_watchdog;
262 ifp->if_init = sbsh_init;
263 ifp->if_baudrate = 4600000;
264 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
265 ifq_set_ready(&ifp->if_snd);
266
267 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
268
269 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->irq_res));
270
271 error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE,
272 sbsh_intr, sc, &sc->intr_hand,
273 ifp->if_serializer);
274 if (error) {
275 ether_ifdetach(ifp);
276 kprintf("sbsh%d: couldn't set up irq\n", unit);
277 goto fail;
278 }
279
280 return(0);
281
282 fail:
283 sbsh_detach(dev);
284 return (error);
285 }
286
287 static int
288 sbsh_detach(device_t dev)
289 {
290 struct sbsh_softc *sc = device_get_softc(dev);
291 struct ifnet *ifp = &sc->arpcom.ac_if;
292
293 if (device_is_attached(dev)) {
294 lwkt_serialize_enter(ifp->if_serializer);
295 sbsh_stop(sc);
296 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand);
297 lwkt_serialize_exit(ifp->if_serializer);
298
299 ether_ifdetach(ifp);
300 }
301
302 if (sc->irq_res)
303 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
304 if (sc->mem_res) {
305 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_MAPS + 4,
306 sc->mem_res);
307 }
308
309 return (0);
310 }
311
312
313 static void
314 sbsh_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
315 {
316 struct sbsh_softc *sc = ifp->if_softc;
317
318 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
319
320 if (sc->state == ACTIVE)
321 start_xmit_frames(ifp->if_softc);
322 }
323
324
325 static void
326 sbsh_init(void *xsc)
327 {
328 struct sbsh_softc *sc = xsc;
329 struct ifnet *ifp = &sc->arpcom.ac_if;
330 u_int8_t t;
331
332 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) {
333 return;
334 }
335
336 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
337 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0;
338 sc->head_tdesc = sc->head_rdesc = 0;
339
340 sc->regs->IMR = EXT;
341 t = 2;
342 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1);
343 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) {
344 sc->state = ACTIVATION;
345
346 ifp->if_flags |= IFF_RUNNING;
347 ifq_clr_oactive(&ifp->if_snd);
348 }
349 }
350
351
352 static void
353 sbsh_stop(struct sbsh_softc *sc)
354 {
355 u_int8_t t;
356
357 sc->regs->IMR = EXT;
358
359 t = 0;
360 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1);
361 if (sc->state == ACTIVE) {
362 t = 1;
363 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1);
364 /* FIX! activation manager state */
365
366 /* Is it really must be done here? It calls from intr handler */
367 deactivate(sc);
368 }
369
370 sc->regs->IMR = 0;
371 sc->state = DOWN;
372 }
373
374
375 static void
376 init_card(struct sbsh_softc *sc)
377 {
378 sc->state = NOT_LOADED;
379 sc->tbd = (struct hw_descr *) sc->mem_base;
380 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400);
381 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800);
382 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00);
383
384 sc->regs->CR = 0;
385 sc->regs->SR = 0xff;
386 sc->regs->IMR = 0;
387 }
388
389
390 static int
391 sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
392 {
393 struct sbsh_softc *sc = ifp->if_softc;
394 struct ifreq *ifr = (struct ifreq *) data;
395 struct cx28975_cfg cfg;
396 struct dsl_stats ds;
397 int error = 0;
398 u_int8_t t;
399
400 switch(cmd) {
401 case SIOCLOADFIRMW:
402 if ((error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY)) != 0)
403 break;
404 if (ifp->if_flags & IFF_UP)
405 error = EBUSY;
406
407 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg);
408 if (start_cx28975(sc, cfg) == 0) {
409 static char *modstr[] = {
410 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" };
411 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n",
412 cfg.master ? "master" : "slave",
413 cfg.lrate << 3, modstr[cfg.mod]);
414 } else {
415 if_printf(&sc->arpcom.ac_if,
416 "unable to load firmware\n");
417 error = EIO;
418 }
419 break;
420
421 case SIOCGETSTATS :
422 if ((error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY)) != 0)
423 break;
424
425 t = 0;
426 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1))
427 error = EIO;
428 ds.attenuat = sc->cmdp->out_data[0];
429
430 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1))
431 error = EIO;
432 ds.nmr = sc->cmdp->out_data[0];
433
434 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1))
435 error = EIO;
436 ds.tpbo = sc->cmdp->out_data[0];
437 ds.rpbo = sc->cmdp->out_data[1];
438
439 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) {
440 int i;
441 for (i = 0; i < 10; ++i)
442 ((u_int8_t *) &ds.losw)[i] =
443 sc->cmdp->out_data[i];
444 } else
445 error = EIO;
446
447 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0];
448 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2];
449
450 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats));
451 bcopy(&ds, (char *)ifr->ifr_data + sizeof(struct sbni16_stats),
452 sizeof(struct dsl_stats));
453 break;
454
455 case SIOCCLRSTATS :
456 if (!(error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY))) {
457 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
458 t = 2;
459 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1))
460 error = EIO;
461 }
462 break;
463 case SIOCSIFFLAGS:
464 if (ifp->if_flags & IFF_UP) {
465 if (!(ifp->if_flags & IFF_RUNNING)) {
466 if (sc->state == NOT_LOADED) {
467 if_printf(ifp, "firmware wasn't loaded\n");
468 error = EBUSY;
469 } else
470 sbsh_init(sc);
471 }
472 } else {
473 if (ifp->if_flags & IFF_RUNNING) {
474 sbsh_stop(sc);
475 ifp->if_flags &= ~IFF_RUNNING;
476 }
477 }
478 break;
479
480 case SIOCADDMULTI:
481 case SIOCDELMULTI:
482 error = 0;
483 break;
484 default:
485 error = ether_ioctl(ifp, cmd, data);
486 break;
487 }
488 return (error);
489 }
490
491
492 static void
493 sbsh_shutdown(device_t dev)
494 {
495 struct sbsh_softc *sc = device_get_softc(dev);
496
497 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
498 sbsh_stop(sc);
499 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
500 }
501
502 static int
503 sbsh_suspend(device_t dev)
504 {
505 struct sbsh_softc *sc = device_get_softc(dev);
506
507 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
508 sbsh_stop(sc);
509 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
510
511 return (0);
512 }
513
514 static int
515 sbsh_resume(device_t dev)
516 {
517 struct sbsh_softc *sc = device_get_softc(dev);
518 struct ifnet *ifp = &sc->arpcom.ac_if;
519
520 if (ifp->if_flags & IFF_UP)
521 sbsh_init(sc);
522
523 return (0);
524 }
525
526
527 static void
528 sbsh_watchdog(struct ifnet *ifp)
529 {
530 struct sbsh_softc *sc = ifp->if_softc;
531
532 if_printf(ifp, "transmit timeout\n");
533
534 if (sc->regs->SR & TXS) {
535 sc->regs->SR = TXS;
536 if_printf(ifp, "interrupt posted but not delivered\n");
537 }
538 free_sent_buffers(sc);
539 }
540
541 /* -------------------------------------------------------------------------- */
542
543 static void
544 sbsh_intr(void *arg)
545 {
546 struct sbsh_softc *sc = (struct sbsh_softc *)arg;
547 u_int8_t status = sc->regs->SR;
548
549 if (status == 0)
550 return;
551
552 if (status & EXT) {
553 cx28975_interrupt(sc);
554 sc->regs->SR = EXT;
555 }
556
557 if (status & UFL) {
558 resume_tx(sc);
559 sc->regs->SR = UFL;
560 ++sc->in_stats.ufl_errs;
561 IFNET_STAT_INC(&sc->arpcom.ac_if, oerrors, 1);
562 }
563
564 if (status & RXS) {
565 sc->regs->SR = RXS;
566 indicate_frames(sc);
567 alloc_rx_buffers(sc);
568 }
569
570 if (status & TXS) {
571 sc->regs->SR = TXS;
572 free_sent_buffers(sc);
573 }
574
575 if (status & CRC) {
576 ++sc->in_stats.crc_errs;
577 IFNET_STAT_INC(&sc->arpcom.ac_if, ierrors, 1);
578 sc->regs->SR = CRC;
579 }
580
581 if (status & OFL) {
582 ++sc->in_stats.ofl_errs;
583 IFNET_STAT_INC(&sc->arpcom.ac_if, ierrors, 1);
584 sc->regs->SR = OFL;
585 }
586 }
587
588 /*
589 * Look for a first descriptor of a next packet, and write it's number
590 * into CTDR. Then enable the transmitter.
591 */
592 static void
593 resume_tx(struct sbsh_softc *sc)
594 {
595 u_int32_t cur_tbd = sc->regs->CTDR;
596
597 while (cur_tbd != sc->regs->LTDR
598 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0)
599 ;
600 sc->regs->CTDR = cur_tbd;
601 sc->regs->CR |= TXEN;
602 }
603
604 static void
605 start_xmit_frames(struct sbsh_softc *sc)
606 {
607 struct ifnet *ifp = &sc->arpcom.ac_if;
608 struct mbuf *m;
609
610 /*
611 * Check if we have any free descriptor(s) and free space in
612 * our transmit queue.
613 */
614 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1))
615 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) {
616
617 m = ifq_dequeue(&ifp->if_snd);
618 if (m == NULL)
619 break;
620 if (m->m_pkthdr.len) {
621 BPF_MTAP(ifp, m);
622 encap_frame(sc, m);
623 } else
624 m_freem(m);
625 }
626
627 if (sc->regs->CTDR != sc->regs->LTDR)
628 ifq_set_oactive(&ifp->if_snd);
629 else
630 ifq_clr_oactive(&ifp->if_snd);
631 }
632
633
634 static void
635 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head)
636 {
637 struct mbuf *m;
638 u_int32_t cur_tbd;
639 int done;
640
641 look_for_nonzero:
642 for (m = m_head; !m->m_len; m = m->m_next)
643 ;
644
645 cur_tbd = sc->regs->LTDR & 0x7f;
646 done = 0;
647 do {
648 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) {
649 if ((m_head = repack(sc, m_head)) != NULL)
650 goto look_for_nonzero;
651 else
652 return;
653 }
654
655 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t));
656 sc->tbd[cur_tbd].length = m->m_len;
657
658 do {
659 m = m->m_next;
660 } while (m && !m->m_len);
661
662 if (!m) { /* last fragment has been reached */
663 sc->tbd[cur_tbd].length |= LAST_FRAG;
664 done = 1;
665 }
666
667 ++cur_tbd;
668 cur_tbd &= 0x7f;
669 } while (!done);
670
671 sc->xq[sc->tail_xq++] = m_head;
672 sc->tail_xq &= (XQLEN - 1);
673
674 sc->regs->LTDR = cur_tbd;
675 ++sc->in_stats.sent_pkts;
676 IFNET_STAT_INC(&sc->arpcom.ac_if, opackets, 1);
677 }
678
679 static struct mbuf *
680 repack(struct sbsh_softc *sc, struct mbuf *m)
681 {
682 struct mbuf *m_new;
683
684 MGETHDR(m_new, MB_DONTWAIT, MT_DATA);
685 if (!m_new) {
686 if_printf (&sc->arpcom.ac_if,
687 "unable to get mbuf.\n");
688 return (NULL);
689 }
690
691 if (m->m_pkthdr.len > MHLEN) {
692 MCLGET(m_new, MB_DONTWAIT);
693 if (!(m_new->m_flags & M_EXT)) {
694 m_freem(m_new);
695 if_printf (&sc->arpcom.ac_if,
696 "unable to get mbuf cluster.\n");
697 return (NULL);
698 }
699 }
700
701 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t));
702 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len;
703 m_freem(m);
704 return (m_new);
705 }
706
707 static void
708 free_sent_buffers(struct sbsh_softc *sc)
709 {
710 u_int32_t cur_tbd;
711
712 cur_tbd = sc->regs->CTDR;
713
714 while (sc->head_tdesc != cur_tbd) {
715 /*
716 * Be careful! one element in xq may correspond to
717 * multiple descriptors.
718 */
719 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) {
720 m_freem(sc->xq[sc->head_xq++]);
721 sc->head_xq &= (XQLEN - 1);
722 }
723
724 sc->tbd[sc->head_tdesc].length = 0;
725 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f;
726 }
727
728 start_xmit_frames(sc);
729 }
730
731 /*
732 * DON'T use free_sent_buffers to drop the queue!
733 */
734 static void
735 alloc_rx_buffers(struct sbsh_softc *sc)
736 {
737 unsigned cur_rbd = sc->regs->LRDR & 0x7f;
738 struct mbuf *m;
739
740 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) {
741 MGETHDR(m, MB_DONTWAIT, MT_DATA);
742 if (!m) {
743 if_printf (&sc->arpcom.ac_if,
744 "unable to get mbuf.\n");
745 return;
746 }
747
748 if (SBNI16_MAX_FRAME > MHLEN) {
749 MCLGET(m, MB_DONTWAIT);
750 if (!(m->m_flags & M_EXT)) {
751 m_freem(m);
752 if_printf (&sc->arpcom.ac_if,
753 "unable to get mbuf cluster.\n");
754 return;
755 }
756 m->m_pkthdr.len = m->m_len = MCLBYTES;
757 }
758
759 m_adj(m, 2); /* align ip on longword boundaries */
760
761 sc->rq[sc->tail_rq++] = m;
762 sc->tail_rq &= (RQLEN - 1);
763
764 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t));
765 sc->rbd[cur_rbd].length = 0;
766 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f;
767 }
768 }
769
770 static void
771 indicate_frames(struct sbsh_softc *sc)
772 {
773 struct ifnet *ifp = &sc->arpcom.ac_if;
774 unsigned cur_rbd = sc->regs->CRDR & 0x7f;
775
776 while (sc->head_rdesc != cur_rbd) {
777 struct mbuf *m = sc->rq[sc->head_rq++];
778 sc->head_rq &= (RQLEN - 1);
779
780 m->m_pkthdr.len = m->m_len =
781 sc->rbd[sc->head_rdesc].length & 0x7ff;
782 m->m_pkthdr.rcvif = ifp;
783
784 ifp->if_input(ifp, m);
785 ++sc->in_stats.rcvd_pkts;
786 IFNET_STAT_INC(ifp, ipackets, 1);
787
788 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f;
789 }
790 }
791
792 static void
793 drop_queues(struct sbsh_softc *sc)
794 {
795 while (sc->head_rq != sc->tail_rq) {
796 m_freem(sc->rq[sc->head_rq++]);
797 sc->head_rq &= (RQLEN - 1);
798 }
799
800 while (sc->head_xq != sc->tail_xq) {
801 m_freem(sc->xq[sc->head_xq++]);
802 sc->head_xq &= (XQLEN - 1);
803 }
804 }
805
806 /* -------------------------------------------------------------------------- */
807
808 static void
809 activate(struct sbsh_softc *sc)
810 {
811 struct timeval tv;
812
813 sc->regs->SR = 0xff; /* clear it! */
814 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0;
815
816 sc->head_tdesc = sc->head_rdesc = 0;
817 alloc_rx_buffers(sc);
818
819 sc->regs->CRB &= ~RXDE;
820 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL;
821 sc->regs->CR |= TXEN | RXEN;
822
823 sc->state = ACTIVE;
824 ++sc->in_stats.attempts;
825 microtime(&tv);
826 sc->in_stats.last_time = tv.tv_sec;
827 start_xmit_frames(sc);
828 }
829
830 static void
831 deactivate(struct sbsh_softc *sc)
832 {
833 sc->regs->CR &= ~(RXEN | TXEN);
834 sc->regs->CRB |= RXDE;
835 sc->regs->IMR = EXT;
836 sc->regs->CTDR = sc->regs->LTDR;
837 sc->regs->CRDR = sc->regs->LRDR;
838 sc->state = ACTIVATION;
839
840 drop_queues(sc);
841 }
842
843 /* -------------------------------------------------------------------------- */
844
845 static void
846 cx28975_interrupt(struct sbsh_softc *sc)
847 {
848 volatile struct cx28975_cmdarea *p = sc->cmdp;
849
850 if (p->intr_host != 0xfe)
851 return;
852
853 if (p->out_ack & 0x80) {
854 if (*((volatile u_int8_t *)p + 0x3c7) & 2) {
855 if (sc->state != ACTIVE
856 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) {
857 activate(sc);
858 if_printf(&sc->arpcom.ac_if, "connected to peer\n");
859 } else if (sc->state == ACTIVE
860 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) {
861 deactivate(sc);
862 if_printf(&sc->arpcom.ac_if, "carrier lost\n");
863 }
864 }
865
866 p->intr_host = 0;
867 p->out_ack = 0;
868 } else {
869 wakeup(sc);
870
871 p->intr_host = 0;
872 }
873 }
874
875 /* -------------------------------------------------------------------------- */
876
877 static int
878 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg)
879 {
880 static char thresh[] = { +8, -4, -16, -40 };
881
882 volatile struct cx28975_cmdarea *p = sc->cmdp;
883 u_int8_t t, parm[12];
884
885 p->intr_host = 0;
886 t = p->intr_host;
887
888 /* reset chip set */
889 sc->regs->IMR = EXT;
890 sc->regs->CR = 0;
891 sc->regs->SR = 0xff;
892 DELAY(2);
893 sc->regs->CR = XRST;
894 if (cfg.crc16)
895 sc->regs->CR |= CMOD;
896 if (cfg.fill_7e)
897 sc->regs->CR |= FMOD;
898 if (cfg.inv)
899 sc->regs->CR |= PMOD;
900
901 sc->regs->CRB |= RODD | RXDE;
902 if (cfg.rburst)
903 sc->regs->CRB |= RDBE;
904 if (cfg.wburst)
905 sc->regs->CRB |= WTBE;
906
907 tsleep(sc, 0, "sbsh", 0);
908 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP)
909 return (-1);
910
911 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len))
912 return (-1);
913
914 tsleep(sc, 0, "sbsh", 0);
915 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP)
916 return (-1);
917
918 t = cfg.master ? 1 : 9;
919 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1))
920 return (-1);
921
922 t = 0x63;
923 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1))
924 return (-1);
925
926 *(u_int16_t *)parm = cfg.lrate >> 3;
927 parm[2] = parm[3] = parm[0];
928 parm[5] = cfg.lrate & 7;
929 parm[4] = parm[7] = 1;
930 parm[6] = 0;
931 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8))
932 return (-1);
933
934 parm[0] = 0x02 | (cfg.mod << 4);
935 parm[1] = 0;
936 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2))
937 return (-1);
938
939 bzero(parm, 12);
940 parm[0] = 0x04; /* pre-activation: G.hs */
941 parm[4] = 0x04; /* no remote configuration */
942 parm[7] = 0x01; /* annex A (default) */
943 parm[8] = 0xff; /* i-bit mask (all bits) */
944 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12))
945 return (-1);
946
947 parm[0] = 0x03; /* dying gasp time - 3 frames */
948 parm[1] = thresh[cfg.mod];
949 parm[2] = 0xff; /* attenuation */
950 parm[3] = 0x04; /* line probe NMR (+2 dB) */
951 parm[4] = 0x00; /* reserved */
952 parm[5] = 0x00;
953 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6))
954 return (-1);
955
956 t = cfg.master ? 0x23 : 0x21;
957 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1))
958 return (-1);
959
960 t = 0x02;
961 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1))
962 return (-1);
963
964 sc->state = DOWN;
965 return (0);
966 }
967
968 static int
969 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len)
970 {
971 u_int32_t t;
972 int i;
973 u_int8_t cksum = 0;
974
975 for (i = 0; i < img_len; ++i)
976 cksum += img[i];
977
978 t = img_len;
979 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4))
980 return (-1);
981
982 for (i = 0; img_len >= 75; i += 75, img_len -= 75) {
983 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75))
984 return (-1);
985 }
986
987 if (img_len
988 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len))
989 return (-1);
990
991 t = (cksum ^ 0xff) + 1;
992 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1))
993 return (-1);
994
995 return (0);
996 }
997
998 static int
999 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd,
1000 u_int8_t *data, u_int8_t size)
1001 {
1002 volatile struct cx28975_cmdarea *p = sc->cmdp;
1003 volatile u_int8_t *databuf = p->in_data;
1004 int i;
1005
1006 u_int8_t cksum = 0;
1007
1008 p->in_dest = 0xf0;
1009 p->in_opcode = cmd;
1010 p->in_zero = 0;
1011 p->in_length = --size;
1012 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa;
1013
1014 for (i = 0; i <= size; ++i) {
1015 cksum ^= *data;
1016 *databuf++ = *data++; /* only 1 byte per cycle! */
1017 }
1018
1019 p->in_datasum = cksum ^ 0xaa;
1020 p->out_ack = _ACK_NOT_COMPLETE;
1021 p->intr_8051 = 0xfe;
1022
1023 if (tsleep(sc, 0, "sbsh", hz << 3))
1024 return (-1);
1025
1026 while (p->out_ack == _ACK_NOT_COMPLETE)
1027 ; /* FIXME ! */
1028
1029 if ((p->out_ack & 0x1f) == _ACK_PASS) {
1030 p->out_ack = 0;
1031 return (0);
1032 } else {
1033 p->out_ack = 0;
1034 return (-1);
1035 }
1036 }
Cache object: 35be3eb766b7b8f492eac7871cd756e2
|