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[dragonfly.git] / sys / dev / netif / sbsh / if_sbsh.c
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984263bc
MD		 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 $
dadab5e9 27 * $DragonFly: src/sys/dev/netif/sbsh/if_sbsh.c,v 1.4 2003/06/25 03:55:48 dillon Exp $
984263bc
MD		 28 */
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/sockio.h>
33#include <sys/mbuf.h>
34#include <sys/malloc.h>
35#include <sys/kernel.h>
36#include <sys/proc.h>
37#include <sys/socket.h>
38#include <sys/random.h>
39#include <machine/clock.h>
40#include <machine/stdarg.h>
41
42#include <net/if.h>
43#include <net/if_arp.h>
44#include <net/ethernet.h>
45#include <net/if_media.h>
46
47#include <net/bpf.h>
48
49#include <vm/vm.h>
50#include <vm/pmap.h>
51#include <machine/bus.h>
52#include <machine/resource.h>
53#include <sys/bus.h>
54#include <sys/rman.h>
55
56#include <pci/pcireg.h>
57#include <pci/pcivar.h>
58
59#include <dev/sbsh/if_sbshreg.h>
60
61/* -------------------------------------------------------------------------- */
62
63struct sbni16_hw_regs {
64 u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR;
65};
66
67struct hw_descr {
68 u_int32_t address;
69 u_int32_t length;
70};
71
72struct 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
97struct 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
126struct 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 */
141struct 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
147enum 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
153static int sbsh_probe(device_t);
154static int sbsh_attach(device_t);
155static int sbsh_detach(device_t);
156static int sbsh_ioctl(struct ifnet *, u_long, caddr_t);
157static void sbsh_shutdown(device_t);
158static int sbsh_suspend(device_t);
159static int sbsh_resume(device_t);
160static void sbsh_watchdog(struct ifnet *);
161
162static void sbsh_start(struct ifnet *);
163static void sbsh_init(void *);
164static void sbsh_stop(struct sbsh_softc *);
165static void init_card(struct sbsh_softc *);
166static void sbsh_intr(void *);
167static void resume_tx(struct sbsh_softc *);
168static void start_xmit_frames(struct sbsh_softc *);
169static void encap_frame(struct sbsh_softc *, struct mbuf *);
170static struct mbuf * repack(struct sbsh_softc *, struct mbuf *);
171static void free_sent_buffers(struct sbsh_softc *);
172static void alloc_rx_buffers(struct sbsh_softc *);
173static void indicate_frames(struct sbsh_softc *);
174static void drop_queues(struct sbsh_softc *);
175static void activate(struct sbsh_softc *);
176static void deactivate(struct sbsh_softc *);
177static void cx28975_interrupt(struct sbsh_softc *);
178static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg);
179static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t);
180static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t,
181 u_int8_t *, u_int8_t);
182
183static 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 { 0, 0 }
193};
194
195static driver_t sbsh_driver = {
196 "sbsh",
197 sbsh_methods,
198 sizeof(struct sbsh_softc)
199};
200
201static devclass_t sbsh_devclass;
202
203DRIVER_MODULE(if_sbsh, pci, sbsh_driver, sbsh_devclass, 0, 0);
204
205static int
206sbsh_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
217static int
218sbsh_attach(device_t dev)
219{
220 struct sbsh_softc *sc;
221 struct ifnet *ifp;
222 int unit, error = 0, rid, s;
223
224 s = splimp();
225
226 sc = device_get_softc(dev);
227 unit = device_get_unit(dev);
228
229 rid = PCIR_MAPS + 4;
230 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
231 0, ~0, 4096, RF_ACTIVE);
232
233 if (sc->mem_res == NULL) {
234 printf ("sbsh%d: couldn't map memory\n", unit);
235 error = ENXIO;
236 goto fail;
237 }
238
239 rid = 0;
240 sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
241 RF_SHAREABLE | RF_ACTIVE);
242
243 if (sc->irq_res == NULL) {
244 printf("sbsh%d: couldn't map interrupt\n", unit);
245 bus_release_resource(dev, SYS_RES_MEMORY,
246 PCIR_MAPS + 4, sc->mem_res);
247 error = ENXIO;
248 goto fail;
249 }
250
251 sc->mem_base = rman_get_virtual(sc->mem_res);
252 init_card(sc);
253
254 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
255 sbsh_intr, sc, &sc->intr_hand);
256 if (error) {
257 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
258 bus_release_resource(dev, SYS_RES_MEMORY,
259 PCIR_MAPS + 4, sc->mem_res);
260 printf("sbsh%d: couldn't set up irq\n", unit);
261 goto fail;
262 }
263
264 /* generate ethernet MAC address */
265 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192);
266 read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2);
267
268 ifp = &sc->arpcom.ac_if;
269 ifp->if_softc = sc;
270 ifp->if_unit = unit;
271 ifp->if_name = "sbsh";
272 ifp->if_mtu = ETHERMTU;
273 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
274 ifp->if_ioctl = sbsh_ioctl;
275 ifp->if_output = ether_output;
276 ifp->if_start = sbsh_start;
277 ifp->if_watchdog = sbsh_watchdog;
278 ifp->if_init = sbsh_init;
279 ifp->if_baudrate = 4600000;
280 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
281
282 ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
283
284fail:
285 splx(s);
286 return (error);
287}
288
289static int
290sbsh_detach(device_t dev)
291{
292 struct sbsh_softc *sc;
293 struct ifnet *ifp;
294 int s;
295
296 s = splimp();
297
298 sc = device_get_softc(dev);
299 ifp = &sc->arpcom.ac_if;
300
301 sbsh_stop(sc);
302 ether_ifdetach(ifp, ETHER_BPF_SUPPORTED);
303
304 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand);
305 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res);
306 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_MAPS + 4, sc->mem_res);
307
308 splx(s);
309 return (0);
310}
311
312
313static void
314sbsh_start(struct ifnet *ifp)
315{
316 struct sbsh_softc *sc = ifp->if_softc;
317 int s;
318
319 if (sc->state != ACTIVE)
320 return;
321
322 s = splimp();
323 start_xmit_frames(ifp->if_softc);
324 splx(s);
325}
326
327
328static void
329sbsh_init(void *xsc)
330{
331 struct sbsh_softc *sc = xsc;
332 struct ifnet *ifp = &sc->arpcom.ac_if;
333 int s;
334 u_int8_t t;
335
336 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED)
337 return;
338
339 s = splimp();
340
341 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
342 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0;
343 sc->head_tdesc = sc->head_rdesc = 0;
344
345 sc->regs->IMR = EXT;
346 t = 2;
347 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1);
348 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) {
349 sc->state = ACTIVATION;
350
351 ifp->if_flags |= IFF_RUNNING;
352 ifp->if_flags &= ~IFF_OACTIVE;
353 }
354
355 splx(s);
356}
357
358
359static void
360sbsh_stop(struct sbsh_softc *sc)
361{
362 int s;
363 u_int8_t t;
364
365 s = splimp();
366 sc->regs->IMR = EXT;
367
368 t = 0;
369 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1);
370 if (sc->state == ACTIVE) {
371 t = 1;
372 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1);
373 /* FIX! activation manager state */
374
375 /* Is it really must be done here? It calls from intr handler */
376 deactivate(sc);
377 }
378
379 sc->regs->IMR = 0;
380 sc->state = DOWN;
381 splx(s);
382}
383
384
385static void
386init_card(struct sbsh_softc *sc)
387{
388 sc->state = NOT_LOADED;
389 sc->tbd = (struct hw_descr *) sc->mem_base;
390 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400);
391 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800);
392 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00);
393
394 sc->regs->CR = 0;
395 sc->regs->SR = 0xff;
396 sc->regs->IMR = 0;
397}
398
399
400static int
401sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
402{
403 struct sbsh_softc *sc = ifp->if_softc;
404 struct ifreq *ifr = (struct ifreq *) data;
405 struct cx28975_cfg cfg;
406 struct dsl_stats ds;
dadab5e9 407 struct thread *td = curthread;
984263bc
MD		 408 int s, error = 0;
409 u_int8_t t;
410
411 s = splimp();
412
413 switch(cmd) {
414 case SIOCLOADFIRMW:
dadab5e9 415 if ((error = suser(td)) != 0)
984263bc
MD		 416 break;
417 if (ifp->if_flags & IFF_UP)
418 error = EBUSY;
419
420 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg);
421 if (start_cx28975(sc, cfg) == 0) {
422 static char *modstr[] = {
423 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" };
424 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n",
425 cfg.master ? "master" : "slave",
426 cfg.lrate << 3, modstr[cfg.mod]);
427 } else {
428 if_printf(&sc->arpcom.ac_if,
429 "unable to load firmware\n");
430 error = EIO;
431 }
432 break;
433
434 case SIOCGETSTATS :
dadab5e9 435 if ((error = suser(td)) != 0)
984263bc
MD		 436 break;
437
438 t = 0;
439 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1))
440 error = EIO;
441 ds.attenuat = sc->cmdp->out_data[0];
442
443 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1))
444 error = EIO;
445 ds.nmr = sc->cmdp->out_data[0];
446
447 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1))
448 error = EIO;
449 ds.tpbo = sc->cmdp->out_data[0];
450 ds.rpbo = sc->cmdp->out_data[1];
451
452 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) {
453 int i;
454 for (i = 0; i < 10; ++i)
455 ((u_int8_t *) &ds.losw)[i] =
456 sc->cmdp->out_data[i];
457 } else
458 error = EIO;
459
460 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0];
461 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2];
462
463 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats));
464 bcopy(&ds, ifr->ifr_data + sizeof(struct sbni16_stats),
465 sizeof(struct dsl_stats));
466 break;
467
468 case SIOCCLRSTATS :
dadab5e9 469 if (!(error = suser(td))) {
984263bc
MD		 470 bzero(&sc->in_stats, sizeof(struct sbni16_stats));
471 t = 2;
472 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1))
473 error = EIO;
474 }
475 break;
476
477 case SIOCSIFADDR:
478 case SIOCGIFADDR:
479 case SIOCSIFMTU:
480 error = ether_ioctl(ifp, cmd, data);
481 break;
482
483 case SIOCSIFFLAGS:
484 if (ifp->if_flags & IFF_UP) {
485 if (!(ifp->if_flags & IFF_RUNNING)) {
486 if (sc->state == NOT_LOADED) {
487 if_printf(ifp, "firmware wasn't loaded\n");
488 error = EBUSY;
489 } else
490 sbsh_init(sc);
491 }
492 } else {
493 if (ifp->if_flags & IFF_RUNNING) {
494 sbsh_stop(sc);
495 ifp->if_flags &= ~IFF_RUNNING;
496 }
497 }
498 break;
499
500 case SIOCADDMULTI:
501 case SIOCDELMULTI:
502 error = 0;
503 break;
504
505 default:
506 error = EINVAL;
507 break;
508 }
509
510 splx(s);
511 return (error);
512}
513
514
515static void
516sbsh_shutdown(device_t dev)
517{
518 struct sbsh_softc *sc = device_get_softc(dev);
519
520 sbsh_stop(sc);
521}
522
523static int
524sbsh_suspend(device_t dev)
525{
526 struct sbsh_softc *sc = device_get_softc(dev);
527 int s;
528
529 s = splimp();
530 sbsh_stop(sc);
531 splx(s);
532
533 return (0);
534}
535
536static int
537sbsh_resume(device_t dev)
538{
539 struct sbsh_softc *sc = device_get_softc(dev);
540 struct ifnet *ifp;
541 int s;
542
543 s = splimp();
544 ifp = &sc->arpcom.ac_if;
545
546 if (ifp->if_flags & IFF_UP)
547 sbsh_init(sc);
548
549 splx(s);
550 return (0);
551}
552
553
554static void
555sbsh_watchdog(struct ifnet *ifp)
556{
557 struct sbsh_softc *sc = ifp->if_softc;
558
559 if_printf(ifp, "transmit timeout\n");
560
561 if (sc->regs->SR & TXS) {
562 sc->regs->SR = TXS;
563 if_printf(ifp, "interrupt posted but not delivered\n");
564 }
565 free_sent_buffers(sc);
566}
567
568/* -------------------------------------------------------------------------- */
569
570static void
571sbsh_intr(void *arg)
572{
573 struct sbsh_softc *sc = (struct sbsh_softc *)arg;
574 u_int8_t status = sc->regs->SR;
575
576 if (status == 0)
577 return;
578
579 if (status & EXT) {
580 cx28975_interrupt(sc);
581 sc->regs->SR = EXT;
582 }
583
584 if (status & UFL) {
585 resume_tx(sc);
586 sc->regs->SR = UFL;
587 ++sc->in_stats.ufl_errs;
588 ++sc->arpcom.ac_if.if_oerrors;
589 }
590
591 if (status & RXS) {
592 sc->regs->SR = RXS;
593 indicate_frames(sc);
594 alloc_rx_buffers(sc);
595 }
596
597 if (status & TXS) {
598 sc->regs->SR = TXS;
599 free_sent_buffers(sc);
600 }
601
602 if (status & CRC) {
603 ++sc->in_stats.crc_errs;
604 ++sc->arpcom.ac_if.if_ierrors;
605 sc->regs->SR = CRC;
606 }
607
608 if (status & OFL) {
609 ++sc->in_stats.ofl_errs;
610 ++sc->arpcom.ac_if.if_ierrors;
611 sc->regs->SR = OFL;
612 }
613}
614
615/*
616 * Look for a first descriptor of a next packet, and write it's number
617 * into CTDR. Then enable the transmitter.
618 */
619static void
620resume_tx(struct sbsh_softc *sc)
621{
622 u_int32_t cur_tbd = sc->regs->CTDR;
623
624 while (cur_tbd != sc->regs->LTDR
625 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0)
626 ;
627 sc->regs->CTDR = cur_tbd;
628 sc->regs->CR |= TXEN;
629}
630
631static void
632start_xmit_frames(struct sbsh_softc *sc)
633{
634 struct ifnet *ifp = &sc->arpcom.ac_if;
635 struct mbuf *m;
636
637 /*
638 * Check if we have any free descriptor(s) and free space in
639 * our transmit queue.
640 */
641 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1))
642 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) {
643
644 IF_DEQUEUE(&ifp->if_snd, m);
645 if (!m)
646 break;
647 if (m->m_pkthdr.len) {
648 if (ifp->if_bpf)
649 bpf_mtap(ifp, m);
650 encap_frame(sc, m);
651 } else
652 m_freem(m);
653 }
654
655 if (sc->regs->CTDR != sc->regs->LTDR)
656 ifp->if_flags |= IFF_OACTIVE;
657 else
658 ifp->if_flags &= ~IFF_OACTIVE;
659}
660
661
662/*
663 * MUST be called at splimp
664 */
665static void
666encap_frame(struct sbsh_softc *sc, struct mbuf *m_head)
667{
668 struct mbuf *m;
669 u_int32_t cur_tbd;
670 int done;
671
672look_for_nonzero:
673 for (m = m_head; !m->m_len; m = m->m_next)
674 ;
675
676 cur_tbd = sc->regs->LTDR & 0x7f;
677 done = 0;
678 do {
679 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) {
680 if ((m_head = repack(sc, m_head)) != NULL)
681 goto look_for_nonzero;
682 else
683 return;
684 }
685
686 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t));
687 sc->tbd[cur_tbd].length = m->m_len;
688
689 do {
690 m = m->m_next;
691 } while (m && !m->m_len);
692
693 if (!m) { /* last fragment has been reached */
694 sc->tbd[cur_tbd].length |= LAST_FRAG;
695 done = 1;
696 }
697
698 ++cur_tbd;
699 cur_tbd &= 0x7f;
700 } while (!done);
701
702 sc->xq[sc->tail_xq++] = m_head;
703 sc->tail_xq &= (XQLEN - 1);
704
705 sc->regs->LTDR = cur_tbd;
706 ++sc->in_stats.sent_pkts;
707 ++sc->arpcom.ac_if.if_opackets;
708}
709
710static struct mbuf *
711repack(struct sbsh_softc *sc, struct mbuf *m)
712{
713 struct mbuf *m_new;
714
715 MGETHDR(m_new, M_DONTWAIT, MT_DATA);
716 if (!m_new) {
717 if_printf (&sc->arpcom.ac_if,
718 "unable to get mbuf.\n");
719 return (NULL);
720 }
721
722 if (m->m_pkthdr.len > MHLEN) {
723 MCLGET(m_new, M_DONTWAIT);
724 if (!(m_new->m_flags & M_EXT)) {
725 m_freem(m_new);
726 if_printf (&sc->arpcom.ac_if,
727 "unable to get mbuf cluster.\n");
728 return (NULL);
729 }
730 }
731
732 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t));
733 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len;
734 m_freem(m);
735 return (m_new);
736}
737
738static void
739free_sent_buffers(struct sbsh_softc *sc)
740{
741 u_int32_t cur_tbd;
742
743 cur_tbd = sc->regs->CTDR;
744
745 while (sc->head_tdesc != cur_tbd) {
746 /*
747 * Be careful! one element in xq may correspond to
748 * multiple descriptors.
749 */
750 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) {
751 m_freem(sc->xq[sc->head_xq++]);
752 sc->head_xq &= (XQLEN - 1);
753 }
754
755 sc->tbd[sc->head_tdesc].length = 0;
756 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f;
757 }
758
759 start_xmit_frames(sc);
760}
761
762/*
763 * DON'T use free_sent_buffers to drop the queue!
764 */
765static void
766alloc_rx_buffers(struct sbsh_softc *sc)
767{
768 unsigned cur_rbd = sc->regs->LRDR & 0x7f;
769 struct mbuf *m;
770
771 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) {
772 MGETHDR(m, M_DONTWAIT, MT_DATA);
773 if (!m) {
774 if_printf (&sc->arpcom.ac_if,
775 "unable to get mbuf.\n");
776 return;
777 }
778
779 if (SBNI16_MAX_FRAME > MHLEN) {
780 MCLGET(m, M_DONTWAIT);
781 if (!(m->m_flags & M_EXT)) {
782 m_freem(m);
783 if_printf (&sc->arpcom.ac_if,
784 "unable to get mbuf cluster.\n");
785 return;
786 }
787 m->m_pkthdr.len = m->m_len = MCLBYTES;
788 }
789
790 m_adj(m, 2); /* align ip on longword boundaries */
791
792 sc->rq[sc->tail_rq++] = m;
793 sc->tail_rq &= (RQLEN - 1);
794
795 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t));
796 sc->rbd[cur_rbd].length = 0;
797 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f;
798 }
799}
800
801static void
802indicate_frames(struct sbsh_softc *sc)
803{
804 struct ether_header *eh;
805 unsigned cur_rbd = sc->regs->CRDR & 0x7f;
806
807 while (sc->head_rdesc != cur_rbd) {
808 struct mbuf *m = sc->rq[sc->head_rq++];
809 sc->head_rq &= (RQLEN - 1);
810
811 m->m_pkthdr.len = m->m_len =
812 sc->rbd[sc->head_rdesc].length & 0x7ff;
813 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
814
815 eh = mtod(m, struct ether_header *);
816 m_adj(m, sizeof(struct ether_header));
817 ether_input(&sc->arpcom.ac_if, eh, m);
818 ++sc->in_stats.rcvd_pkts;
819 ++sc->arpcom.ac_if.if_ipackets;
820
821 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f;
822 }
823}
824
825static void
826drop_queues(struct sbsh_softc *sc)
827{
828 while (sc->head_rq != sc->tail_rq) {
829 m_freem(sc->rq[sc->head_rq++]);
830 sc->head_rq &= (RQLEN - 1);
831 }
832
833 while (sc->head_xq != sc->tail_xq) {
834 m_freem(sc->xq[sc->head_xq++]);
835 sc->head_xq &= (XQLEN - 1);
836 }
837}
838
839/* -------------------------------------------------------------------------- */
840
841static void
842activate(struct sbsh_softc *sc)
843{
844 struct timeval tv;
845
846 sc->regs->SR = 0xff; /* clear it! */
847 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0;
848
849 sc->head_tdesc = sc->head_rdesc = 0;
850 alloc_rx_buffers(sc);
851
852 sc->regs->CRB &= ~RXDE;
853 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL;
854 sc->regs->CR |= TXEN | RXEN;
855
856 sc->state = ACTIVE;
857 ++sc->in_stats.attempts;
858 microtime(&tv);
859 sc->in_stats.last_time = tv.tv_sec;
860 start_xmit_frames(sc);
861}
862
863static void
864deactivate(struct sbsh_softc *sc)
865{
866 sc->regs->CR &= ~(RXEN | TXEN);
867 sc->regs->CRB |= RXDE;
868 sc->regs->IMR = EXT;
869 sc->regs->CTDR = sc->regs->LTDR;
870 sc->regs->CRDR = sc->regs->LRDR;
871 sc->state = ACTIVATION;
872
873 drop_queues(sc);
874}
875
876/* -------------------------------------------------------------------------- */
877
878static void
879cx28975_interrupt(struct sbsh_softc *sc)
880{
881 volatile struct cx28975_cmdarea *p = sc->cmdp;
882 u_int8_t t;
883
884 if (p->intr_host != 0xfe)
885 return;
886
887 if (p->out_ack & 0x80) {
888 if (*((volatile u_int8_t *)p + 0x3c7) & 2) {
889 if (sc->state != ACTIVE
890 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) {
891 activate(sc);
892 if_printf(&sc->arpcom.ac_if, "connected to peer\n");
893 } else if (sc->state == ACTIVE
894 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) {
895 deactivate(sc);
896 if_printf(&sc->arpcom.ac_if, "carrier lost\n");
897 }
898 }
899
900 p->intr_host = 0;
901 t = p->intr_host;
902 p->out_ack = 0;
903 } else {
904 wakeup(sc);
905
906 p->intr_host = 0;
907 t = p->intr_host;
908 }
909}
910
911/* -------------------------------------------------------------------------- */
912
913static int
914start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg)
915{
916 static char thresh[] = { +8, -4, -16, -40 };
917
918 volatile struct cx28975_cmdarea *p = sc->cmdp;
919 u_int8_t t, parm[12];
920
921 p->intr_host = 0;
922 t = p->intr_host;
923
924 /* reset chip set */
925 sc->regs->IMR = EXT;
926 sc->regs->CR = 0;
927 sc->regs->SR = 0xff;
928 DELAY(2);
929 sc->regs->CR = XRST;
930 if (cfg.crc16)
931 sc->regs->CR |= CMOD;
932 if (cfg.fill_7e)
933 sc->regs->CR |= FMOD;
934 if (cfg.inv)
935 sc->regs->CR |= PMOD;
936
937 sc->regs->CRB |= RODD | RXDE;
938 if (cfg.rburst)
939 sc->regs->CRB |= RDBE;
940 if (cfg.wburst)
941 sc->regs->CRB |= WTBE;
942
943 tsleep(sc, PWAIT, "sbsh", 0);
944 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP)
945 return (-1);
946
947 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len))
948 return (-1);
949
950 tsleep(sc, PWAIT, "sbsh", 0);
951 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP)
952 return (-1);
953
954 t = cfg.master ? 1 : 9;
955 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1))
956 return (-1);
957
958 t = 0x63;
959 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1))
960 return (-1);
961
962 *(u_int16_t *)parm = cfg.lrate >> 3;
963 parm[2] = parm[3] = parm[0];
964 parm[5] = cfg.lrate & 7;
965 parm[4] = parm[7] = 1;
966 parm[6] = 0;
967 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8))
968 return (-1);
969
970 parm[0] = 0x02 | (cfg.mod << 4);
971 parm[1] = 0;
972 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2))
973 return (-1);
974
975 bzero(parm, 12);
976 parm[0] = 0x04; /* pre-activation: G.hs */
977 parm[4] = 0x04; /* no remote configuration */
978 parm[7] = 0x01; /* annex A (default) */
979 parm[8] = 0xff; /* i-bit mask (all bits) */
980 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12))
981 return (-1);
982
983 parm[0] = 0x03; /* dying gasp time - 3 frames */
984 parm[1] = thresh[cfg.mod];
985 parm[2] = 0xff; /* attenuation */
986 parm[3] = 0x04; /* line probe NMR (+2 dB) */
987 parm[4] = 0x00; /* reserved */
988 parm[5] = 0x00;
989 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6))
990 return (-1);
991
992 t = cfg.master ? 0x23 : 0x21;
993 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1))
994 return (-1);
995
996 t = 0x02;
997 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1))
998 return (-1);
999
1000 sc->state = DOWN;
1001 return (0);
1002}
1003
1004static int
1005download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len)
1006{
1007 u_int32_t t;
1008 int i;
1009 u_int8_t cksum = 0;
1010
1011 for (i = 0; i < img_len; ++i)
1012 cksum += img[i];
1013
1014 t = img_len;
1015 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4))
1016 return (-1);
1017
1018 for (i = 0; img_len >= 75; i += 75, img_len -= 75) {
1019 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75))
1020 return (-1);
1021 }
1022
1023 if (img_len
1024 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len))
1025 return (-1);
1026
1027 t = (cksum ^ 0xff) + 1;
1028 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1))
1029 return (-1);
1030
1031 return (0);
1032}
1033
1034static int
1035issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd,
1036 u_int8_t *data, u_int8_t size)
1037{
1038 volatile struct cx28975_cmdarea *p = sc->cmdp;
1039 u_int8_t *databuf = p->in_data;
1040 int i;
1041
1042 u_int8_t cksum = 0;
1043
1044 p->in_dest = 0xf0;
1045 p->in_opcode = cmd;
1046 p->in_zero = 0;
1047 p->in_length = --size;
1048 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa;
1049
1050 for (i = 0; i <= size; ++i) {
1051 cksum ^= *data;
1052 *databuf++ = *data++; /* only 1 byte per cycle! */
1053 }
1054
1055 p->in_datasum = cksum ^ 0xaa;
1056 p->out_ack = _ACK_NOT_COMPLETE;
1057 p->intr_8051 = 0xfe;
1058
1059 if (tsleep(sc, PWAIT, "sbsh", hz << 3))
1060 return (-1);
1061
1062 while (p->out_ack == _ACK_NOT_COMPLETE)
1063 ; /* FIXME ! */
1064
1065 if ((p->out_ack & 0x1f) == _ACK_PASS) {
1066 p->out_ack = 0;
1067 return (0);
1068 } else {
1069 p->out_ack = 0;
1070 return (-1);
1071 }
1072}
DragonFly Project Source