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 * $DragonFly: src/sys/dev/netif/sbsh/if_sbsh.c,v 1.28 2008/08/17 04:32:34 sephe Exp $ 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 <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 *); 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 { 0, 0 } 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, 0, 0); 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 error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE, 270 sbsh_intr, sc, &sc->intr_hand, 271 ifp->if_serializer); 272 if (error) { 273 ether_ifdetach(ifp); 274 kprintf("sbsh%d: couldn't set up irq\n", unit); 275 goto fail; 276 } 277 278 ifp->if_cpuid = ithread_cpuid(rman_get_start(sc->irq_res)); 279 KKASSERT(ifp->if_cpuid >= 0 && ifp->if_cpuid < ncpus); 280 281 return(0); 282 283 fail: 284 sbsh_detach(dev); 285 return (error); 286 } 287 288 static int 289 sbsh_detach(device_t dev) 290 { 291 struct sbsh_softc *sc = device_get_softc(dev); 292 struct ifnet *ifp = &sc->arpcom.ac_if; 293 294 if (device_is_attached(dev)) { 295 lwkt_serialize_enter(ifp->if_serializer); 296 sbsh_stop(sc); 297 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand); 298 lwkt_serialize_exit(ifp->if_serializer); 299 300 ether_ifdetach(ifp); 301 } 302 303 if (sc->irq_res) 304 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 305 if (sc->mem_res) { 306 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_MAPS + 4, 307 sc->mem_res); 308 } 309 310 return (0); 311 } 312 313 314 static void 315 sbsh_start(struct ifnet *ifp) 316 { 317 struct sbsh_softc *sc = ifp->if_softc; 318 319 if (sc->state == ACTIVE) 320 start_xmit_frames(ifp->if_softc); 321 } 322 323 324 static void 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 ifp->if_flags &= ~IFF_OACTIVE; 347 } 348 } 349 350 351 static void 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 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 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 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0) 402 break; 403 if (ifp->if_flags & IFF_UP) 404 error = EBUSY; 405 406 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg); 407 if (start_cx28975(sc, cfg) == 0) { 408 static char *modstr[] = { 409 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" }; 410 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n", 411 cfg.master ? "master" : "slave", 412 cfg.lrate << 3, modstr[cfg.mod]); 413 } else { 414 if_printf(&sc->arpcom.ac_if, 415 "unable to load firmware\n"); 416 error = EIO; 417 } 418 break; 419 420 case SIOCGETSTATS : 421 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0) 422 break; 423 424 t = 0; 425 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1)) 426 error = EIO; 427 ds.attenuat = sc->cmdp->out_data[0]; 428 429 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1)) 430 error = EIO; 431 ds.nmr = sc->cmdp->out_data[0]; 432 433 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1)) 434 error = EIO; 435 ds.tpbo = sc->cmdp->out_data[0]; 436 ds.rpbo = sc->cmdp->out_data[1]; 437 438 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) { 439 int i; 440 for (i = 0; i < 10; ++i) 441 ((u_int8_t *) &ds.losw)[i] = 442 sc->cmdp->out_data[i]; 443 } else 444 error = EIO; 445 446 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0]; 447 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2]; 448 449 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats)); 450 bcopy(&ds, (char *)ifr->ifr_data + sizeof(struct sbni16_stats), 451 sizeof(struct dsl_stats)); 452 break; 453 454 case SIOCCLRSTATS : 455 if (!(error = suser_cred(cr, NULL_CRED_OKAY))) { 456 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 457 t = 2; 458 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1)) 459 error = EIO; 460 } 461 break; 462 case SIOCSIFFLAGS: 463 if (ifp->if_flags & IFF_UP) { 464 if (!(ifp->if_flags & IFF_RUNNING)) { 465 if (sc->state == NOT_LOADED) { 466 if_printf(ifp, "firmware wasn't loaded\n"); 467 error = EBUSY; 468 } else 469 sbsh_init(sc); 470 } 471 } else { 472 if (ifp->if_flags & IFF_RUNNING) { 473 sbsh_stop(sc); 474 ifp->if_flags &= ~IFF_RUNNING; 475 } 476 } 477 break; 478 479 case SIOCADDMULTI: 480 case SIOCDELMULTI: 481 error = 0; 482 break; 483 default: 484 error = ether_ioctl(ifp, cmd, data); 485 break; 486 } 487 return (error); 488 } 489 490 491 static void 492 sbsh_shutdown(device_t dev) 493 { 494 struct sbsh_softc *sc = device_get_softc(dev); 495 496 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); 497 sbsh_stop(sc); 498 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); 499 } 500 501 static int 502 sbsh_suspend(device_t dev) 503 { 504 struct sbsh_softc *sc = device_get_softc(dev); 505 506 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); 507 sbsh_stop(sc); 508 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); 509 510 return (0); 511 } 512 513 static int 514 sbsh_resume(device_t dev) 515 { 516 struct sbsh_softc *sc = device_get_softc(dev); 517 struct ifnet *ifp = &sc->arpcom.ac_if; 518 519 if (ifp->if_flags & IFF_UP) 520 sbsh_init(sc); 521 522 return (0); 523 } 524 525 526 static void 527 sbsh_watchdog(struct ifnet *ifp) 528 { 529 struct sbsh_softc *sc = ifp->if_softc; 530 531 if_printf(ifp, "transmit timeout\n"); 532 533 if (sc->regs->SR & TXS) { 534 sc->regs->SR = TXS; 535 if_printf(ifp, "interrupt posted but not delivered\n"); 536 } 537 free_sent_buffers(sc); 538 } 539 540 /* -------------------------------------------------------------------------- */ 541 542 static void 543 sbsh_intr(void *arg) 544 { 545 struct sbsh_softc *sc = (struct sbsh_softc *)arg; 546 u_int8_t status = sc->regs->SR; 547 548 if (status == 0) 549 return; 550 551 if (status & EXT) { 552 cx28975_interrupt(sc); 553 sc->regs->SR = EXT; 554 } 555 556 if (status & UFL) { 557 resume_tx(sc); 558 sc->regs->SR = UFL; 559 ++sc->in_stats.ufl_errs; 560 ++sc->arpcom.ac_if.if_oerrors; 561 } 562 563 if (status & RXS) { 564 sc->regs->SR = RXS; 565 indicate_frames(sc); 566 alloc_rx_buffers(sc); 567 } 568 569 if (status & TXS) { 570 sc->regs->SR = TXS; 571 free_sent_buffers(sc); 572 } 573 574 if (status & CRC) { 575 ++sc->in_stats.crc_errs; 576 ++sc->arpcom.ac_if.if_ierrors; 577 sc->regs->SR = CRC; 578 } 579 580 if (status & OFL) { 581 ++sc->in_stats.ofl_errs; 582 ++sc->arpcom.ac_if.if_ierrors; 583 sc->regs->SR = OFL; 584 } 585 } 586 587 /* 588 * Look for a first descriptor of a next packet, and write it's number 589 * into CTDR. Then enable the transmitter. 590 */ 591 static void 592 resume_tx(struct sbsh_softc *sc) 593 { 594 u_int32_t cur_tbd = sc->regs->CTDR; 595 596 while (cur_tbd != sc->regs->LTDR 597 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0) 598 ; 599 sc->regs->CTDR = cur_tbd; 600 sc->regs->CR |= TXEN; 601 } 602 603 static void 604 start_xmit_frames(struct sbsh_softc *sc) 605 { 606 struct ifnet *ifp = &sc->arpcom.ac_if; 607 struct mbuf *m; 608 609 /* 610 * Check if we have any free descriptor(s) and free space in 611 * our transmit queue. 612 */ 613 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1)) 614 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) { 615 616 m = ifq_dequeue(&ifp->if_snd, NULL); 617 if (m == NULL) 618 break; 619 if (m->m_pkthdr.len) { 620 BPF_MTAP(ifp, m); 621 encap_frame(sc, m); 622 } else 623 m_freem(m); 624 } 625 626 if (sc->regs->CTDR != sc->regs->LTDR) 627 ifp->if_flags |= IFF_OACTIVE; 628 else 629 ifp->if_flags &= ~IFF_OACTIVE; 630 } 631 632 633 static void 634 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head) 635 { 636 struct mbuf *m; 637 u_int32_t cur_tbd; 638 int done; 639 640 look_for_nonzero: 641 for (m = m_head; !m->m_len; m = m->m_next) 642 ; 643 644 cur_tbd = sc->regs->LTDR & 0x7f; 645 done = 0; 646 do { 647 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) { 648 if ((m_head = repack(sc, m_head)) != NULL) 649 goto look_for_nonzero; 650 else 651 return; 652 } 653 654 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t)); 655 sc->tbd[cur_tbd].length = m->m_len; 656 657 do { 658 m = m->m_next; 659 } while (m && !m->m_len); 660 661 if (!m) { /* last fragment has been reached */ 662 sc->tbd[cur_tbd].length |= LAST_FRAG; 663 done = 1; 664 } 665 666 ++cur_tbd; 667 cur_tbd &= 0x7f; 668 } while (!done); 669 670 sc->xq[sc->tail_xq++] = m_head; 671 sc->tail_xq &= (XQLEN - 1); 672 673 sc->regs->LTDR = cur_tbd; 674 ++sc->in_stats.sent_pkts; 675 ++sc->arpcom.ac_if.if_opackets; 676 } 677 678 static struct mbuf * 679 repack(struct sbsh_softc *sc, struct mbuf *m) 680 { 681 struct mbuf *m_new; 682 683 MGETHDR(m_new, MB_DONTWAIT, MT_DATA); 684 if (!m_new) { 685 if_printf (&sc->arpcom.ac_if, 686 "unable to get mbuf.\n"); 687 return (NULL); 688 } 689 690 if (m->m_pkthdr.len > MHLEN) { 691 MCLGET(m_new, MB_DONTWAIT); 692 if (!(m_new->m_flags & M_EXT)) { 693 m_freem(m_new); 694 if_printf (&sc->arpcom.ac_if, 695 "unable to get mbuf cluster.\n"); 696 return (NULL); 697 } 698 } 699 700 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t)); 701 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len; 702 m_freem(m); 703 return (m_new); 704 } 705 706 static void 707 free_sent_buffers(struct sbsh_softc *sc) 708 { 709 u_int32_t cur_tbd; 710 711 cur_tbd = sc->regs->CTDR; 712 713 while (sc->head_tdesc != cur_tbd) { 714 /* 715 * Be careful! one element in xq may correspond to 716 * multiple descriptors. 717 */ 718 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) { 719 m_freem(sc->xq[sc->head_xq++]); 720 sc->head_xq &= (XQLEN - 1); 721 } 722 723 sc->tbd[sc->head_tdesc].length = 0; 724 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f; 725 } 726 727 start_xmit_frames(sc); 728 } 729 730 /* 731 * DON'T use free_sent_buffers to drop the queue! 732 */ 733 static void 734 alloc_rx_buffers(struct sbsh_softc *sc) 735 { 736 unsigned cur_rbd = sc->regs->LRDR & 0x7f; 737 struct mbuf *m; 738 739 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) { 740 MGETHDR(m, MB_DONTWAIT, MT_DATA); 741 if (!m) { 742 if_printf (&sc->arpcom.ac_if, 743 "unable to get mbuf.\n"); 744 return; 745 } 746 747 if (SBNI16_MAX_FRAME > MHLEN) { 748 MCLGET(m, MB_DONTWAIT); 749 if (!(m->m_flags & M_EXT)) { 750 m_freem(m); 751 if_printf (&sc->arpcom.ac_if, 752 "unable to get mbuf cluster.\n"); 753 return; 754 } 755 m->m_pkthdr.len = m->m_len = MCLBYTES; 756 } 757 758 m_adj(m, 2); /* align ip on longword boundaries */ 759 760 sc->rq[sc->tail_rq++] = m; 761 sc->tail_rq &= (RQLEN - 1); 762 763 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t)); 764 sc->rbd[cur_rbd].length = 0; 765 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f; 766 } 767 } 768 769 static void 770 indicate_frames(struct sbsh_softc *sc) 771 { 772 struct ifnet *ifp = &sc->arpcom.ac_if; 773 unsigned cur_rbd = sc->regs->CRDR & 0x7f; 774 775 while (sc->head_rdesc != cur_rbd) { 776 struct mbuf *m = sc->rq[sc->head_rq++]; 777 sc->head_rq &= (RQLEN - 1); 778 779 m->m_pkthdr.len = m->m_len = 780 sc->rbd[sc->head_rdesc].length & 0x7ff; 781 m->m_pkthdr.rcvif = ifp; 782 783 ifp->if_input(ifp, m); 784 ++sc->in_stats.rcvd_pkts; 785 ++ifp->if_ipackets; 786 787 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f; 788 } 789 } 790 791 static void 792 drop_queues(struct sbsh_softc *sc) 793 { 794 while (sc->head_rq != sc->tail_rq) { 795 m_freem(sc->rq[sc->head_rq++]); 796 sc->head_rq &= (RQLEN - 1); 797 } 798 799 while (sc->head_xq != sc->tail_xq) { 800 m_freem(sc->xq[sc->head_xq++]); 801 sc->head_xq &= (XQLEN - 1); 802 } 803 } 804 805 /* -------------------------------------------------------------------------- */ 806 807 static void 808 activate(struct sbsh_softc *sc) 809 { 810 struct timeval tv; 811 812 sc->regs->SR = 0xff; /* clear it! */ 813 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0; 814 815 sc->head_tdesc = sc->head_rdesc = 0; 816 alloc_rx_buffers(sc); 817 818 sc->regs->CRB &= ~RXDE; 819 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL; 820 sc->regs->CR |= TXEN | RXEN; 821 822 sc->state = ACTIVE; 823 ++sc->in_stats.attempts; 824 microtime(&tv); 825 sc->in_stats.last_time = tv.tv_sec; 826 start_xmit_frames(sc); 827 } 828 829 static void 830 deactivate(struct sbsh_softc *sc) 831 { 832 sc->regs->CR &= ~(RXEN | TXEN); 833 sc->regs->CRB |= RXDE; 834 sc->regs->IMR = EXT; 835 sc->regs->CTDR = sc->regs->LTDR; 836 sc->regs->CRDR = sc->regs->LRDR; 837 sc->state = ACTIVATION; 838 839 drop_queues(sc); 840 } 841 842 /* -------------------------------------------------------------------------- */ 843 844 static void 845 cx28975_interrupt(struct sbsh_softc *sc) 846 { 847 volatile struct cx28975_cmdarea *p = sc->cmdp; 848 u_int8_t t; 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 t = p->intr_host; 868 p->out_ack = 0; 869 } else { 870 wakeup(sc); 871 872 p->intr_host = 0; 873 t = p->intr_host; 874 } 875 } 876 877 /* -------------------------------------------------------------------------- */ 878 879 static int 880 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg) 881 { 882 static char thresh[] = { +8, -4, -16, -40 }; 883 884 volatile struct cx28975_cmdarea *p = sc->cmdp; 885 u_int8_t t, parm[12]; 886 887 p->intr_host = 0; 888 t = p->intr_host; 889 890 /* reset chip set */ 891 sc->regs->IMR = EXT; 892 sc->regs->CR = 0; 893 sc->regs->SR = 0xff; 894 DELAY(2); 895 sc->regs->CR = XRST; 896 if (cfg.crc16) 897 sc->regs->CR |= CMOD; 898 if (cfg.fill_7e) 899 sc->regs->CR |= FMOD; 900 if (cfg.inv) 901 sc->regs->CR |= PMOD; 902 903 sc->regs->CRB |= RODD | RXDE; 904 if (cfg.rburst) 905 sc->regs->CRB |= RDBE; 906 if (cfg.wburst) 907 sc->regs->CRB |= WTBE; 908 909 tsleep(sc, 0, "sbsh", 0); 910 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP) 911 return (-1); 912 913 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len)) 914 return (-1); 915 916 tsleep(sc, 0, "sbsh", 0); 917 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP) 918 return (-1); 919 920 t = cfg.master ? 1 : 9; 921 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1)) 922 return (-1); 923 924 t = 0x63; 925 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1)) 926 return (-1); 927 928 *(u_int16_t *)parm = cfg.lrate >> 3; 929 parm[2] = parm[3] = parm[0]; 930 parm[5] = cfg.lrate & 7; 931 parm[4] = parm[7] = 1; 932 parm[6] = 0; 933 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8)) 934 return (-1); 935 936 parm[0] = 0x02 | (cfg.mod << 4); 937 parm[1] = 0; 938 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2)) 939 return (-1); 940 941 bzero(parm, 12); 942 parm[0] = 0x04; /* pre-activation: G.hs */ 943 parm[4] = 0x04; /* no remote configuration */ 944 parm[7] = 0x01; /* annex A (default) */ 945 parm[8] = 0xff; /* i-bit mask (all bits) */ 946 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12)) 947 return (-1); 948 949 parm[0] = 0x03; /* dying gasp time - 3 frames */ 950 parm[1] = thresh[cfg.mod]; 951 parm[2] = 0xff; /* attenuation */ 952 parm[3] = 0x04; /* line probe NMR (+2 dB) */ 953 parm[4] = 0x00; /* reserved */ 954 parm[5] = 0x00; 955 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6)) 956 return (-1); 957 958 t = cfg.master ? 0x23 : 0x21; 959 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1)) 960 return (-1); 961 962 t = 0x02; 963 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1)) 964 return (-1); 965 966 sc->state = DOWN; 967 return (0); 968 } 969 970 static int 971 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len) 972 { 973 u_int32_t t; 974 int i; 975 u_int8_t cksum = 0; 976 977 for (i = 0; i < img_len; ++i) 978 cksum += img[i]; 979 980 t = img_len; 981 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4)) 982 return (-1); 983 984 for (i = 0; img_len >= 75; i += 75, img_len -= 75) { 985 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75)) 986 return (-1); 987 } 988 989 if (img_len 990 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len)) 991 return (-1); 992 993 t = (cksum ^ 0xff) + 1; 994 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1)) 995 return (-1); 996 997 return (0); 998 } 999 1000 static int 1001 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd, 1002 u_int8_t *data, u_int8_t size) 1003 { 1004 volatile struct cx28975_cmdarea *p = sc->cmdp; 1005 volatile u_int8_t *databuf = p->in_data; 1006 int i; 1007 1008 u_int8_t cksum = 0; 1009 1010 p->in_dest = 0xf0; 1011 p->in_opcode = cmd; 1012 p->in_zero = 0; 1013 p->in_length = --size; 1014 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa; 1015 1016 for (i = 0; i <= size; ++i) { 1017 cksum ^= *data; 1018 *databuf++ = *data++; /* only 1 byte per cycle! */ 1019 } 1020 1021 p->in_datasum = cksum ^ 0xaa; 1022 p->out_ack = _ACK_NOT_COMPLETE; 1023 p->intr_8051 = 0xfe; 1024 1025 if (tsleep(sc, 0, "sbsh", hz << 3)) 1026 return (-1); 1027 1028 while (p->out_ack == _ACK_NOT_COMPLETE) 1029 ; /* FIXME ! */ 1030 1031 if ((p->out_ack & 0x1f) == _ACK_PASS) { 1032 p->out_ack = 0; 1033 return (0); 1034 } else { 1035 p->out_ack = 0; 1036 return (-1); 1037 } 1038 } 1039