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/caps.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/interrupt.h>
43
44 #include <net/if.h>
45 #include <net/ifq_var.h>
46 #include <net/if_arp.h>
47 #include <net/ethernet.h>
48 #include <net/if_media.h>
49
50 #include <net/bpf.h>
51
52 #include <vm/vm.h>
53 #include <vm/pmap.h>
54
55 #include <bus/pci/pcireg.h>
56 #include <bus/pci/pcivar.h>
57
58 #include "if_sbshreg.h"
59
60 /* -------------------------------------------------------------------------- */
61
62 struct sbni16_hw_regs {
63 u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR;
64 };
65
66 struct hw_descr {
67 u_int32_t address;
68 u_int32_t length;
69 };
70
71 struct cx28975_cmdarea {
72 u_int8_t intr_host;
73 u_int8_t intr_8051;
74 u_int8_t map_version;
75
76 u_int8_t in_dest;
77 u_int8_t in_opcode;
78 u_int8_t in_zero;
79 u_int8_t in_length;
80 u_int8_t in_csum;
81 u_int8_t in_data[75];
82 u_int8_t in_datasum;
83
84 u_int8_t out_dest;
85 u_int8_t out_opcode;
86 u_int8_t out_ack;
87 u_int8_t out_length;
88 u_int8_t out_csum;
89 u_int8_t out_data[75];
90 u_int8_t out_datasum;
91 };
92
93 #define XQLEN 8
94 #define RQLEN 8
95
96 struct sbsh_softc {
97 struct arpcom arpcom; /* ethernet common */
98
99 struct resource *mem_res;
100 struct resource *irq_res;
101 void *intr_hand;
102
103 void *mem_base; /* mapped memory address */
104
105 volatile struct sbni16_hw_regs *regs;
106 volatile struct hw_descr *tbd;
107 volatile struct hw_descr *rbd;
108 volatile struct cx28975_cmdarea *cmdp;
109
110 /* SBNI16 controller statistics */
111 struct sbni16_stats {
112 u_int32_t sent_pkts, rcvd_pkts;
113 u_int32_t crc_errs, ufl_errs, ofl_errs, attempts, last_time;
114 } in_stats;
115
116 /* transmit and reception queues */
117 struct mbuf *xq[XQLEN], *rq[RQLEN];
118 unsigned head_xq, tail_xq, head_rq, tail_rq;
119
120 /* the descriptors mapped onto the first buffers in xq and rq */
121 unsigned head_tdesc, head_rdesc;
122 u_int8_t state;
123 };
124
125 struct cx28975_cfg {
126 u_int8_t *firmw_image;
127 u_int32_t firmw_len;
128 u_int32_t lrate: 10;
129 u_int32_t master: 1;
130 u_int32_t mod: 2;
131 u_int32_t crc16: 1;
132 u_int32_t fill_7e: 1;
133 u_int32_t inv: 1;
134 u_int32_t rburst: 1;
135 u_int32_t wburst: 1;
136 u_int32_t : 14;
137 };
138
139 /* SHDSL transceiver statistics */
140 struct dsl_stats {
141 u_int8_t status_1, status_3;
142 u_int8_t attenuat, nmr, tpbo, rpbo;
143 u_int16_t losw, segd, crc, sega, losd;
144 };
145
146 enum State { NOT_LOADED, DOWN, ACTIVATION, ACTIVE };
147
148 #define SIOCLOADFIRMW _IOWR('i', 67, struct ifreq)
149 #define SIOCGETSTATS _IOWR('i', 68, struct ifreq)
150 #define SIOCCLRSTATS _IOWR('i', 69, struct ifreq)
151
152 static int sbsh_probe(device_t);
153 static int sbsh_attach(device_t);
154 static int sbsh_detach(device_t);
155 static int sbsh_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
156 static void sbsh_shutdown(device_t);
157 static int sbsh_suspend(device_t);
158 static int sbsh_resume(device_t);
159 static void sbsh_watchdog(struct ifnet *);
160
161 static void sbsh_start(struct ifnet *, struct ifaltq_subque *);
162 static void sbsh_init(void *);
163 static void sbsh_stop(struct sbsh_softc *);
164 static void init_card(struct sbsh_softc *);
165 static void sbsh_intr(void *);
166 static void resume_tx(struct sbsh_softc *);
167 static void start_xmit_frames(struct sbsh_softc *);
168 static void encap_frame(struct sbsh_softc *, struct mbuf *);
169 static struct mbuf * repack(struct sbsh_softc *, struct mbuf *);
170 static void free_sent_buffers(struct sbsh_softc *);
171 static void alloc_rx_buffers(struct sbsh_softc *);
172 static void indicate_frames(struct sbsh_softc *);
173 static void drop_queues(struct sbsh_softc *);
174 static void activate(struct sbsh_softc *);
175 static void deactivate(struct sbsh_softc *);
176 static void cx28975_interrupt(struct sbsh_softc *);
177 static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg);
178 static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t);
179 static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t,
180 u_int8_t *, u_int8_t);
181
182 static device_method_t sbsh_methods[] = {
183 /* Device interface */
184 DEVMETHOD(device_probe, sbsh_probe),
185 DEVMETHOD(device_attach, sbsh_attach),
186 DEVMETHOD(device_detach, sbsh_detach),
187 DEVMETHOD(device_shutdown, sbsh_shutdown),
188 DEVMETHOD(device_suspend, sbsh_suspend),
189 DEVMETHOD(device_resume, sbsh_resume),
190
191 DEVMETHOD_END
192 };
193
194 static driver_t sbsh_driver = {
195 "sbsh",
196 sbsh_methods,
197 sizeof(struct sbsh_softc)
198 };
199
200 static devclass_t sbsh_devclass;
201
202 DECLARE_DUMMY_MODULE(if_sbsh);
203 DRIVER_MODULE(if_sbsh, pci, sbsh_driver, sbsh_devclass, NULL, NULL);
204
205 static int
sbsh_probe(device_t dev)206 sbsh_probe(device_t dev)
207 {
208 if (pci_get_vendor(dev) != SBNI16_VENDOR
209 || pci_get_device(dev) != SBNI16_DEVICE
210 || pci_get_subdevice(dev) != SBNI16_SUBDEV)
211 return (ENXIO);
212
213 device_set_desc(dev, "Granch SBNI16 G.SHDSL Modem");
214 return (0);
215 }
216
217 static int
sbsh_attach(device_t dev)218 sbsh_attach(device_t dev)
219 {
220 struct sbsh_softc *sc;
221 struct ifnet *ifp;
222 int unit, error = 0, rid;
223
224 sc = device_get_softc(dev);
225 unit = device_get_unit(dev);
226
227 rid = PCIR_MAPS + 4;
228 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
229 0, ~0, 4096, RF_ACTIVE);
230
231 if (sc->mem_res == NULL) {
232 kprintf ("sbsh%d: couldn't map memory\n", unit);
233 error = ENXIO;
234 goto fail;
235 }
236
237 rid = 0;
238 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
239 RF_SHAREABLE | RF_ACTIVE);
240
241 if (sc->irq_res == NULL) {
242 kprintf("sbsh%d: couldn't map interrupt\n", unit);
243 error = ENXIO;
244 goto fail;
245 }
246
247 sc->mem_base = rman_get_virtual(sc->mem_res);
248 init_card(sc);
249 /* generate ethernet MAC address */
250 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192);
251 read_random(sc->arpcom.ac_enaddr + 4, 2, 1);
252
253 ifp = &sc->arpcom.ac_if;
254 ifp->if_softc = sc;
255 if_initname(ifp, "sbsh", unit);
256 ifp->if_mtu = ETHERMTU;
257 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
258 ifp->if_ioctl = sbsh_ioctl;
259 ifp->if_start = sbsh_start;
260 ifp->if_watchdog = sbsh_watchdog;
261 ifp->if_init = sbsh_init;
262 ifp->if_baudrate = 4600000;
263 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
264 ifq_set_ready(&ifp->if_snd);
265
266 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
267
268 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->irq_res));
269
270 error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE,
271 sbsh_intr, sc, &sc->intr_hand,
272 ifp->if_serializer);
273 if (error) {
274 ether_ifdetach(ifp);
275 kprintf("sbsh%d: couldn't set up irq\n", unit);
276 goto fail;
277 }
278
279 return(0);
280
281 fail:
282 sbsh_detach(dev);
283 return (error);
284 }
285
286 static int
sbsh_detach(device_t dev)287 sbsh_detach(device_t dev)
288 {
289 struct sbsh_softc *sc = device_get_softc(dev);
290 struct ifnet *ifp = &sc->arpcom.ac_if;
291
292 if (device_is_attached(dev)) {
293 lwkt_serialize_enter(ifp->if_serializer);
294 sbsh_stop(sc);
295 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand);
296 lwkt_serialize_exit(ifp->if_serializer);
297
298 ether_ifdetach(ifp);
299 }
300
301 if (sc->irq_res)
302 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
303 if (sc->mem_res) {
304 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_MAPS + 4,
305 sc->mem_res);
306 }
307
308 return (0);
309 }
310
311
312 static void
sbsh_start(struct ifnet * ifp,struct ifaltq_subque * ifsq)313 sbsh_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
314 {
315 struct sbsh_softc *sc = ifp->if_softc;
316
317 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
318
319 if (sc->state == ACTIVE)
320 start_xmit_frames(ifp->if_softc);
321 }
322
323
324 static void
sbsh_init(void * xsc)325 sbsh_init(void *xsc)
326 {
327 struct sbsh_softc *sc = xsc;
328 struct ifnet *ifp = &sc->arpcom.ac_if;
329 u_int8_t t;
330
331 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) {
332 return;
333 }
334
335 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
336 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0;
337 sc->head_tdesc = sc->head_rdesc = 0;
338
339 sc->regs->IMR = EXT;
340 t = 2;
341 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1);
342 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) {
343 sc->state = ACTIVATION;
344
345 ifp->if_flags |= IFF_RUNNING;
346 ifq_clr_oactive(&ifp->if_snd);
347 }
348 }
349
350
351 static void
sbsh_stop(struct sbsh_softc * sc)352 sbsh_stop(struct sbsh_softc *sc)
353 {
354 u_int8_t t;
355
356 sc->regs->IMR = EXT;
357
358 t = 0;
359 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1);
360 if (sc->state == ACTIVE) {
361 t = 1;
362 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1);
363 /* FIX! activation manager state */
364
365 /* Is it really must be done here? It calls from intr handler */
366 deactivate(sc);
367 }
368
369 sc->regs->IMR = 0;
370 sc->state = DOWN;
371 }
372
373
374 static void
init_card(struct sbsh_softc * sc)375 init_card(struct sbsh_softc *sc)
376 {
377 sc->state = NOT_LOADED;
378 sc->tbd = (struct hw_descr *) sc->mem_base;
379 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400);
380 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800);
381 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00);
382
383 sc->regs->CR = 0;
384 sc->regs->SR = 0xff;
385 sc->regs->IMR = 0;
386 }
387
388
389 static int
sbsh_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data,struct ucred * cr)390 sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
391 {
392 struct sbsh_softc *sc = ifp->if_softc;
393 struct ifreq *ifr = (struct ifreq *) data;
394 struct cx28975_cfg cfg;
395 struct dsl_stats ds;
396 int error = 0;
397 u_int8_t t;
398
399 switch(cmd) {
400 case SIOCLOADFIRMW:
401 error = caps_priv_check(cr, SYSCAP_RESTRICTEDROOT |
402 __SYSCAP_NULLCRED);
403 if (error)
404 break;
405 if (ifp->if_flags & IFF_UP)
406 error = EBUSY;
407
408 bzero(&cfg, sizeof(cfg));
409 error = copyin((caddr_t)ifr->ifr_data,
410 (caddr_t)&cfg,
411 sizeof cfg);
412 if (error) {
413 /* fall out */
414 } else if (start_cx28975(sc, cfg) == 0) {
415 static char *modstr[] = {
416 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" };
417 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n",
418 cfg.master ? "master" : "slave",
419 cfg.lrate << 3, modstr[cfg.mod]);
420 } else {
421 if_printf(&sc->arpcom.ac_if,
422 "unable to load firmware\n");
423 error = EIO;
424 }
425 break;
426
427 case SIOCGETSTATS :
428 error = caps_priv_check(cr, SYSCAP_RESTRICTEDROOT |
429 __SYSCAP_NULLCRED);
430 if (error)
431 break;
432
433 t = 0;
434 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1))
435 error = EIO;
436 ds.attenuat = sc->cmdp->out_data[0];
437
438 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1))
439 error = EIO;
440 ds.nmr = sc->cmdp->out_data[0];
441
442 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1))
443 error = EIO;
444 ds.tpbo = sc->cmdp->out_data[0];
445 ds.rpbo = sc->cmdp->out_data[1];
446
447 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) {
448 int i;
449 for (i = 0; i < 10; ++i)
450 ((u_int8_t *) &ds.losw)[i] =
451 sc->cmdp->out_data[i];
452 } else {
453 error = EIO;
454 }
455
456 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0];
457 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2];
458
459 if (error == 0) {
460 error = copyout(&sc->in_stats,
461 ifr->ifr_data,
462 sizeof(struct sbni16_stats));
463 }
464 if (error == 0) {
465 error = copyout(&ds,
466 (char *)ifr->ifr_data +
467 sizeof(struct sbni16_stats),
468 sizeof(struct dsl_stats));
469 }
470 break;
471
472 case SIOCCLRSTATS :
473 error = caps_priv_check(cr, SYSCAP_RESTRICTEDROOT |
474 __SYSCAP_NULLCRED);
475 if (error == 0) {
476 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
477 t = 2;
478 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1))
479 error = EIO;
480 }
481 break;
482 case SIOCSIFFLAGS:
483 if (ifp->if_flags & IFF_UP) {
484 if (!(ifp->if_flags & IFF_RUNNING)) {
485 if (sc->state == NOT_LOADED) {
486 if_printf(ifp, "firmware wasn't loaded\n");
487 error = EBUSY;
488 } else
489 sbsh_init(sc);
490 }
491 } else {
492 if (ifp->if_flags & IFF_RUNNING) {
493 sbsh_stop(sc);
494 ifp->if_flags &= ~IFF_RUNNING;
495 }
496 }
497 break;
498
499 case SIOCADDMULTI:
500 case SIOCDELMULTI:
501 error = 0;
502 break;
503 default:
504 error = ether_ioctl(ifp, cmd, data);
505 break;
506 }
507 return (error);
508 }
509
510
511 static void
sbsh_shutdown(device_t dev)512 sbsh_shutdown(device_t dev)
513 {
514 struct sbsh_softc *sc = device_get_softc(dev);
515
516 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
517 sbsh_stop(sc);
518 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
519 }
520
521 static int
sbsh_suspend(device_t dev)522 sbsh_suspend(device_t dev)
523 {
524 struct sbsh_softc *sc = device_get_softc(dev);
525
526 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer);
527 sbsh_stop(sc);
528 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer);
529
530 return (0);
531 }
532
533 static int
sbsh_resume(device_t dev)534 sbsh_resume(device_t dev)
535 {
536 struct sbsh_softc *sc = device_get_softc(dev);
537 struct ifnet *ifp = &sc->arpcom.ac_if;
538
539 if (ifp->if_flags & IFF_UP)
540 sbsh_init(sc);
541
542 return (0);
543 }
544
545
546 static void
sbsh_watchdog(struct ifnet * ifp)547 sbsh_watchdog(struct ifnet *ifp)
548 {
549 struct sbsh_softc *sc = ifp->if_softc;
550
551 if_printf(ifp, "transmit timeout\n");
552
553 if (sc->regs->SR & TXS) {
554 sc->regs->SR = TXS;
555 if_printf(ifp, "interrupt posted but not delivered\n");
556 }
557 free_sent_buffers(sc);
558 }
559
560 /* -------------------------------------------------------------------------- */
561
562 static void
sbsh_intr(void * arg)563 sbsh_intr(void *arg)
564 {
565 struct sbsh_softc *sc = (struct sbsh_softc *)arg;
566 u_int8_t status = sc->regs->SR;
567
568 if (status == 0)
569 return;
570
571 if (status & EXT) {
572 cx28975_interrupt(sc);
573 sc->regs->SR = EXT;
574 }
575
576 if (status & UFL) {
577 resume_tx(sc);
578 sc->regs->SR = UFL;
579 ++sc->in_stats.ufl_errs;
580 IFNET_STAT_INC(&sc->arpcom.ac_if, oerrors, 1);
581 }
582
583 if (status & RXS) {
584 sc->regs->SR = RXS;
585 indicate_frames(sc);
586 alloc_rx_buffers(sc);
587 }
588
589 if (status & TXS) {
590 sc->regs->SR = TXS;
591 free_sent_buffers(sc);
592 }
593
594 if (status & CRC) {
595 ++sc->in_stats.crc_errs;
596 IFNET_STAT_INC(&sc->arpcom.ac_if, ierrors, 1);
597 sc->regs->SR = CRC;
598 }
599
600 if (status & OFL) {
601 ++sc->in_stats.ofl_errs;
602 IFNET_STAT_INC(&sc->arpcom.ac_if, ierrors, 1);
603 sc->regs->SR = OFL;
604 }
605 }
606
607 /*
608 * Look for a first descriptor of a next packet, and write it's number
609 * into CTDR. Then enable the transmitter.
610 */
611 static void
resume_tx(struct sbsh_softc * sc)612 resume_tx(struct sbsh_softc *sc)
613 {
614 u_int32_t cur_tbd = sc->regs->CTDR;
615
616 while (cur_tbd != sc->regs->LTDR
617 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0)
618 ;
619 sc->regs->CTDR = cur_tbd;
620 sc->regs->CR |= TXEN;
621 }
622
623 static void
start_xmit_frames(struct sbsh_softc * sc)624 start_xmit_frames(struct sbsh_softc *sc)
625 {
626 struct ifnet *ifp = &sc->arpcom.ac_if;
627 struct mbuf *m;
628
629 /*
630 * Check if we have any free descriptor(s) and free space in
631 * our transmit queue.
632 */
633 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1))
634 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) {
635
636 m = ifq_dequeue(&ifp->if_snd);
637 if (m == NULL)
638 break;
639 if (m->m_pkthdr.len) {
640 BPF_MTAP(ifp, m);
641 encap_frame(sc, m);
642 } else
643 m_freem(m);
644 }
645
646 if (sc->regs->CTDR != sc->regs->LTDR)
647 ifq_set_oactive(&ifp->if_snd);
648 else
649 ifq_clr_oactive(&ifp->if_snd);
650 }
651
652
653 static void
encap_frame(struct sbsh_softc * sc,struct mbuf * m_head)654 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head)
655 {
656 struct mbuf *m;
657 u_int32_t cur_tbd;
658 int done;
659
660 look_for_nonzero:
661 for (m = m_head; !m->m_len; m = m->m_next)
662 ;
663
664 cur_tbd = sc->regs->LTDR & 0x7f;
665 done = 0;
666 do {
667 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) {
668 if ((m_head = repack(sc, m_head)) != NULL)
669 goto look_for_nonzero;
670 else
671 return;
672 }
673
674 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t));
675 sc->tbd[cur_tbd].length = m->m_len;
676
677 do {
678 m = m->m_next;
679 } while (m && !m->m_len);
680
681 if (!m) { /* last fragment has been reached */
682 sc->tbd[cur_tbd].length |= LAST_FRAG;
683 done = 1;
684 }
685
686 ++cur_tbd;
687 cur_tbd &= 0x7f;
688 } while (!done);
689
690 sc->xq[sc->tail_xq++] = m_head;
691 sc->tail_xq &= (XQLEN - 1);
692
693 sc->regs->LTDR = cur_tbd;
694 ++sc->in_stats.sent_pkts;
695 IFNET_STAT_INC(&sc->arpcom.ac_if, opackets, 1);
696 }
697
698 static struct mbuf *
repack(struct sbsh_softc * sc,struct mbuf * m)699 repack(struct sbsh_softc *sc, struct mbuf *m)
700 {
701 struct mbuf *m_new;
702
703 MGETHDR(m_new, M_NOWAIT, MT_DATA);
704 if (!m_new) {
705 if_printf (&sc->arpcom.ac_if,
706 "unable to get mbuf.\n");
707 return (NULL);
708 }
709
710 if (m->m_pkthdr.len > MHLEN) {
711 MCLGET(m_new, M_NOWAIT);
712 if (!(m_new->m_flags & M_EXT)) {
713 m_freem(m_new);
714 if_printf (&sc->arpcom.ac_if,
715 "unable to get mbuf cluster.\n");
716 return (NULL);
717 }
718 }
719
720 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, void *));
721 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len;
722 m_freem(m);
723 return (m_new);
724 }
725
726 static void
free_sent_buffers(struct sbsh_softc * sc)727 free_sent_buffers(struct sbsh_softc *sc)
728 {
729 u_int32_t cur_tbd;
730
731 cur_tbd = sc->regs->CTDR;
732
733 while (sc->head_tdesc != cur_tbd) {
734 /*
735 * Be careful! one element in xq may correspond to
736 * multiple descriptors.
737 */
738 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) {
739 m_freem(sc->xq[sc->head_xq++]);
740 sc->head_xq &= (XQLEN - 1);
741 }
742
743 sc->tbd[sc->head_tdesc].length = 0;
744 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f;
745 }
746
747 start_xmit_frames(sc);
748 }
749
750 /*
751 * DON'T use free_sent_buffers to drop the queue!
752 */
753 static void
alloc_rx_buffers(struct sbsh_softc * sc)754 alloc_rx_buffers(struct sbsh_softc *sc)
755 {
756 unsigned cur_rbd = sc->regs->LRDR & 0x7f;
757 struct mbuf *m;
758
759 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) {
760 MGETHDR(m, M_NOWAIT, MT_DATA);
761 if (!m) {
762 if_printf (&sc->arpcom.ac_if,
763 "unable to get mbuf.\n");
764 return;
765 }
766
767 if (SBNI16_MAX_FRAME > MHLEN) {
768 MCLGET(m, M_NOWAIT);
769 if (!(m->m_flags & M_EXT)) {
770 m_freem(m);
771 if_printf (&sc->arpcom.ac_if,
772 "unable to get mbuf cluster.\n");
773 return;
774 }
775 m->m_pkthdr.len = m->m_len = MCLBYTES;
776 }
777
778 m_adj(m, 2); /* align ip on longword boundaries */
779
780 sc->rq[sc->tail_rq++] = m;
781 sc->tail_rq &= (RQLEN - 1);
782
783 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t));
784 sc->rbd[cur_rbd].length = 0;
785 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f;
786 }
787 }
788
789 static void
indicate_frames(struct sbsh_softc * sc)790 indicate_frames(struct sbsh_softc *sc)
791 {
792 struct ifnet *ifp = &sc->arpcom.ac_if;
793 unsigned cur_rbd = sc->regs->CRDR & 0x7f;
794
795 while (sc->head_rdesc != cur_rbd) {
796 struct mbuf *m = sc->rq[sc->head_rq++];
797 sc->head_rq &= (RQLEN - 1);
798
799 m->m_pkthdr.len = m->m_len =
800 sc->rbd[sc->head_rdesc].length & 0x7ff;
801 m->m_pkthdr.rcvif = ifp;
802
803 ifp->if_input(ifp, m, NULL, -1);
804 ++sc->in_stats.rcvd_pkts;
805 IFNET_STAT_INC(ifp, ipackets, 1);
806
807 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f;
808 }
809 }
810
811 static void
drop_queues(struct sbsh_softc * sc)812 drop_queues(struct sbsh_softc *sc)
813 {
814 while (sc->head_rq != sc->tail_rq) {
815 m_freem(sc->rq[sc->head_rq++]);
816 sc->head_rq &= (RQLEN - 1);
817 }
818
819 while (sc->head_xq != sc->tail_xq) {
820 m_freem(sc->xq[sc->head_xq++]);
821 sc->head_xq &= (XQLEN - 1);
822 }
823 }
824
825 /* -------------------------------------------------------------------------- */
826
827 static void
activate(struct sbsh_softc * sc)828 activate(struct sbsh_softc *sc)
829 {
830 struct timeval tv;
831
832 sc->regs->SR = 0xff; /* clear it! */
833 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0;
834
835 sc->head_tdesc = sc->head_rdesc = 0;
836 alloc_rx_buffers(sc);
837
838 sc->regs->CRB &= ~RXDE;
839 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL;
840 sc->regs->CR |= TXEN | RXEN;
841
842 sc->state = ACTIVE;
843 ++sc->in_stats.attempts;
844 microtime(&tv);
845 sc->in_stats.last_time = tv.tv_sec;
846 start_xmit_frames(sc);
847 }
848
849 static void
deactivate(struct sbsh_softc * sc)850 deactivate(struct sbsh_softc *sc)
851 {
852 sc->regs->CR &= ~(RXEN | TXEN);
853 sc->regs->CRB |= RXDE;
854 sc->regs->IMR = EXT;
855 sc->regs->CTDR = sc->regs->LTDR;
856 sc->regs->CRDR = sc->regs->LRDR;
857 sc->state = ACTIVATION;
858
859 drop_queues(sc);
860 }
861
862 /* -------------------------------------------------------------------------- */
863
864 static void
cx28975_interrupt(struct sbsh_softc * sc)865 cx28975_interrupt(struct sbsh_softc *sc)
866 {
867 volatile struct cx28975_cmdarea *p = sc->cmdp;
868
869 if (p->intr_host != 0xfe)
870 return;
871
872 if (p->out_ack & 0x80) {
873 if (*((volatile u_int8_t *)p + 0x3c7) & 2) {
874 if (sc->state != ACTIVE
875 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) {
876 activate(sc);
877 if_printf(&sc->arpcom.ac_if, "connected to peer\n");
878 } else if (sc->state == ACTIVE
879 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) {
880 deactivate(sc);
881 if_printf(&sc->arpcom.ac_if, "carrier lost\n");
882 }
883 }
884
885 p->intr_host = 0;
886 p->out_ack = 0;
887 } else {
888 wakeup(sc);
889
890 p->intr_host = 0;
891 }
892 }
893
894 /* -------------------------------------------------------------------------- */
895
896 static int
start_cx28975(struct sbsh_softc * sc,struct cx28975_cfg cfg)897 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg)
898 {
899 static char thresh[] = { +8, -4, -16, -40 };
900
901 volatile struct cx28975_cmdarea *p = sc->cmdp;
902 u_int8_t t, parm[12];
903
904 p->intr_host = 0;
905 t = p->intr_host;
906
907 /* reset chip set */
908 sc->regs->IMR = EXT;
909 sc->regs->CR = 0;
910 sc->regs->SR = 0xff;
911 DELAY(2);
912 sc->regs->CR = XRST;
913 if (cfg.crc16)
914 sc->regs->CR |= CMOD;
915 if (cfg.fill_7e)
916 sc->regs->CR |= FMOD;
917 if (cfg.inv)
918 sc->regs->CR |= PMOD;
919
920 sc->regs->CRB |= RODD | RXDE;
921 if (cfg.rburst)
922 sc->regs->CRB |= RDBE;
923 if (cfg.wburst)
924 sc->regs->CRB |= WTBE;
925
926 tsleep(sc, 0, "sbsh", 0);
927 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP)
928 return (-1);
929
930 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len))
931 return (-1);
932
933 tsleep(sc, 0, "sbsh", 0);
934 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP)
935 return (-1);
936
937 t = cfg.master ? 1 : 9;
938 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1))
939 return (-1);
940
941 t = 0x63;
942 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1))
943 return (-1);
944
945 *(u_int16_t *)parm = cfg.lrate >> 3;
946 parm[2] = parm[3] = parm[0];
947 parm[5] = cfg.lrate & 7;
948 parm[4] = parm[7] = 1;
949 parm[6] = 0;
950 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8))
951 return (-1);
952
953 parm[0] = 0x02 | (cfg.mod << 4);
954 parm[1] = 0;
955 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2))
956 return (-1);
957
958 bzero(parm, 12);
959 parm[0] = 0x04; /* pre-activation: G.hs */
960 parm[4] = 0x04; /* no remote configuration */
961 parm[7] = 0x01; /* annex A (default) */
962 parm[8] = 0xff; /* i-bit mask (all bits) */
963 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12))
964 return (-1);
965
966 parm[0] = 0x03; /* dying gasp time - 3 frames */
967 parm[1] = thresh[cfg.mod];
968 parm[2] = 0xff; /* attenuation */
969 parm[3] = 0x04; /* line probe NMR (+2 dB) */
970 parm[4] = 0x00; /* reserved */
971 parm[5] = 0x00;
972 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6))
973 return (-1);
974
975 t = cfg.master ? 0x23 : 0x21;
976 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1))
977 return (-1);
978
979 t = 0x02;
980 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1))
981 return (-1);
982
983 sc->state = DOWN;
984 return (0);
985 }
986
987 static int
download_firmware(struct sbsh_softc * sc,u_int8_t * img,u_int32_t img_len)988 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len)
989 {
990 u_int32_t t;
991 int i;
992 u_int8_t cksum = 0;
993
994 for (i = 0; i < img_len; ++i)
995 cksum += img[i];
996
997 t = img_len;
998 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4))
999 return (-1);
1000
1001 for (i = 0; img_len >= 75; i += 75, img_len -= 75) {
1002 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75))
1003 return (-1);
1004 }
1005
1006 if (img_len
1007 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len))
1008 return (-1);
1009
1010 t = (cksum ^ 0xff) + 1;
1011 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1))
1012 return (-1);
1013
1014 return (0);
1015 }
1016
1017 static int
issue_cx28975_cmd(struct sbsh_softc * sc,u_int8_t cmd,u_int8_t * data,u_int8_t size)1018 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd,
1019 u_int8_t *data, u_int8_t size)
1020 {
1021 volatile struct cx28975_cmdarea *p = sc->cmdp;
1022 volatile u_int8_t *databuf = p->in_data;
1023 int i;
1024
1025 u_int8_t cksum = 0;
1026
1027 p->in_dest = 0xf0;
1028 p->in_opcode = cmd;
1029 p->in_zero = 0;
1030 p->in_length = --size;
1031 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa;
1032
1033 for (i = 0; i <= size; ++i) {
1034 cksum ^= *data;
1035 *databuf++ = *data++; /* only 1 byte per cycle! */
1036 }
1037
1038 p->in_datasum = cksum ^ 0xaa;
1039 p->out_ack = _ACK_NOT_COMPLETE;
1040 p->intr_8051 = 0xfe;
1041
1042 if (tsleep(sc, 0, "sbsh", hz << 3))
1043 return (-1);
1044
1045 while (p->out_ack == _ACK_NOT_COMPLETE)
1046 ; /* FIXME ! */
1047
1048 if ((p->out_ack & 0x1f) == _ACK_PASS) {
1049 p->out_ack = 0;
1050 return (0);
1051 } else {
1052 p->out_ack = 0;
1053 return (-1);
1054 }
1055 }
1056