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 1.19 2005/06/12 17:44:29 joerg 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/thread2.h> 40 41 #include <net/if.h> 42 #include <net/ifq_var.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 <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 printf ("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 printf("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); 268 269 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, 270 sbsh_intr, sc, &sc->intr_hand, NULL); 271 if (error) { 272 ether_ifdetach(ifp); 273 printf("sbsh%d: couldn't set up irq\n", unit); 274 goto fail; 275 } 276 277 return(0); 278 279 fail: 280 sbsh_detach(dev); 281 return (error); 282 } 283 284 static int 285 sbsh_detach(device_t dev) 286 { 287 struct sbsh_softc *sc = device_get_softc(dev); 288 struct ifnet *ifp = &sc->arpcom.ac_if; 289 290 crit_enter(); 291 292 if (device_is_attached(dev)) { 293 sbsh_stop(sc); 294 ether_ifdetach(ifp); 295 } 296 297 if (sc->intr_hand) 298 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand); 299 300 crit_exit(); 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 return (0); 309 } 310 311 312 static void 313 sbsh_start(struct ifnet *ifp) 314 { 315 struct sbsh_softc *sc = ifp->if_softc; 316 317 crit_enter(); 318 319 if (sc->state == ACTIVE) 320 start_xmit_frames(ifp->if_softc); 321 322 crit_exit(); 323 } 324 325 326 static void 327 sbsh_init(void *xsc) 328 { 329 struct sbsh_softc *sc = xsc; 330 struct ifnet *ifp = &sc->arpcom.ac_if; 331 u_int8_t t; 332 333 crit_enter(); 334 335 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) { 336 crit_exit(); 337 return; 338 } 339 340 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 341 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0; 342 sc->head_tdesc = sc->head_rdesc = 0; 343 344 sc->regs->IMR = EXT; 345 t = 2; 346 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1); 347 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) { 348 sc->state = ACTIVATION; 349 350 ifp->if_flags |= IFF_RUNNING; 351 ifp->if_flags &= ~IFF_OACTIVE; 352 } 353 354 crit_exit(); 355 } 356 357 358 static void 359 sbsh_stop(struct sbsh_softc *sc) 360 { 361 u_int8_t t; 362 363 crit_enter(); 364 365 sc->regs->IMR = EXT; 366 367 t = 0; 368 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1); 369 if (sc->state == ACTIVE) { 370 t = 1; 371 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1); 372 /* FIX! activation manager state */ 373 374 /* Is it really must be done here? It calls from intr handler */ 375 deactivate(sc); 376 } 377 378 sc->regs->IMR = 0; 379 sc->state = DOWN; 380 381 crit_enter(); 382 } 383 384 385 static void 386 init_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 } 398 399 400 static int 401 sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 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; 407 int error = 0; 408 u_int8_t t; 409 410 crit_enter(); 411 412 switch(cmd) { 413 case SIOCLOADFIRMW: 414 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0) 415 break; 416 if (ifp->if_flags & IFF_UP) 417 error = EBUSY; 418 419 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg); 420 if (start_cx28975(sc, cfg) == 0) { 421 static char *modstr[] = { 422 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" }; 423 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n", 424 cfg.master ? "master" : "slave", 425 cfg.lrate << 3, modstr[cfg.mod]); 426 } else { 427 if_printf(&sc->arpcom.ac_if, 428 "unable to load firmware\n"); 429 error = EIO; 430 } 431 break; 432 433 case SIOCGETSTATS : 434 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0) 435 break; 436 437 t = 0; 438 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1)) 439 error = EIO; 440 ds.attenuat = sc->cmdp->out_data[0]; 441 442 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1)) 443 error = EIO; 444 ds.nmr = sc->cmdp->out_data[0]; 445 446 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1)) 447 error = EIO; 448 ds.tpbo = sc->cmdp->out_data[0]; 449 ds.rpbo = sc->cmdp->out_data[1]; 450 451 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) { 452 int i; 453 for (i = 0; i < 10; ++i) 454 ((u_int8_t *) &ds.losw)[i] = 455 sc->cmdp->out_data[i]; 456 } else 457 error = EIO; 458 459 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0]; 460 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2]; 461 462 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats)); 463 bcopy(&ds, (char *)ifr->ifr_data + sizeof(struct sbni16_stats), 464 sizeof(struct dsl_stats)); 465 break; 466 467 case SIOCCLRSTATS : 468 if (!(error = suser_cred(cr, NULL_CRED_OKAY))) { 469 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 470 t = 2; 471 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1)) 472 error = EIO; 473 } 474 break; 475 case SIOCSIFFLAGS: 476 if (ifp->if_flags & IFF_UP) { 477 if (!(ifp->if_flags & IFF_RUNNING)) { 478 if (sc->state == NOT_LOADED) { 479 if_printf(ifp, "firmware wasn't loaded\n"); 480 error = EBUSY; 481 } else 482 sbsh_init(sc); 483 } 484 } else { 485 if (ifp->if_flags & IFF_RUNNING) { 486 sbsh_stop(sc); 487 ifp->if_flags &= ~IFF_RUNNING; 488 } 489 } 490 break; 491 492 case SIOCADDMULTI: 493 case SIOCDELMULTI: 494 error = 0; 495 break; 496 default: 497 error = ether_ioctl(ifp, cmd, data); 498 break; 499 } 500 501 crit_exit(); 502 503 return (error); 504 } 505 506 507 static void 508 sbsh_shutdown(device_t dev) 509 { 510 struct sbsh_softc *sc = device_get_softc(dev); 511 512 sbsh_stop(sc); 513 } 514 515 static int 516 sbsh_suspend(device_t dev) 517 { 518 struct sbsh_softc *sc = device_get_softc(dev); 519 520 crit_enter(); 521 522 sbsh_stop(sc); 523 524 crit_exit(); 525 526 return (0); 527 } 528 529 static int 530 sbsh_resume(device_t dev) 531 { 532 struct sbsh_softc *sc = device_get_softc(dev); 533 struct ifnet *ifp = &sc->arpcom.ac_if; 534 535 crit_enter(); 536 537 if (ifp->if_flags & IFF_UP) 538 sbsh_init(sc); 539 540 crit_exit(); 541 542 return (0); 543 } 544 545 546 static void 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 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 ++sc->arpcom.ac_if.if_oerrors; 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 ++sc->arpcom.ac_if.if_ierrors; 597 sc->regs->SR = CRC; 598 } 599 600 if (status & OFL) { 601 ++sc->in_stats.ofl_errs; 602 ++sc->arpcom.ac_if.if_ierrors; 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 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 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 ifp->if_flags |= IFF_OACTIVE; 648 else 649 ifp->if_flags &= ~IFF_OACTIVE; 650 } 651 652 653 static void 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 ++sc->arpcom.ac_if.if_opackets; 696 } 697 698 static struct mbuf * 699 repack(struct sbsh_softc *sc, struct mbuf *m) 700 { 701 struct mbuf *m_new; 702 703 MGETHDR(m_new, MB_DONTWAIT, 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, MB_DONTWAIT); 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, caddr_t)); 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 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 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, MB_DONTWAIT, 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, MB_DONTWAIT); 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 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); 804 ++sc->in_stats.rcvd_pkts; 805 ++ifp->if_ipackets; 806 807 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f; 808 } 809 } 810 811 static void 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 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 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 865 cx28975_interrupt(struct sbsh_softc *sc) 866 { 867 volatile struct cx28975_cmdarea *p = sc->cmdp; 868 u_int8_t t; 869 870 if (p->intr_host != 0xfe) 871 return; 872 873 if (p->out_ack & 0x80) { 874 if (*((volatile u_int8_t *)p + 0x3c7) & 2) { 875 if (sc->state != ACTIVE 876 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) { 877 activate(sc); 878 if_printf(&sc->arpcom.ac_if, "connected to peer\n"); 879 } else if (sc->state == ACTIVE 880 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) { 881 deactivate(sc); 882 if_printf(&sc->arpcom.ac_if, "carrier lost\n"); 883 } 884 } 885 886 p->intr_host = 0; 887 t = p->intr_host; 888 p->out_ack = 0; 889 } else { 890 wakeup(sc); 891 892 p->intr_host = 0; 893 t = p->intr_host; 894 } 895 } 896 897 /* -------------------------------------------------------------------------- */ 898 899 static int 900 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg) 901 { 902 static char thresh[] = { +8, -4, -16, -40 }; 903 904 volatile struct cx28975_cmdarea *p = sc->cmdp; 905 u_int8_t t, parm[12]; 906 907 p->intr_host = 0; 908 t = p->intr_host; 909 910 /* reset chip set */ 911 sc->regs->IMR = EXT; 912 sc->regs->CR = 0; 913 sc->regs->SR = 0xff; 914 DELAY(2); 915 sc->regs->CR = XRST; 916 if (cfg.crc16) 917 sc->regs->CR |= CMOD; 918 if (cfg.fill_7e) 919 sc->regs->CR |= FMOD; 920 if (cfg.inv) 921 sc->regs->CR |= PMOD; 922 923 sc->regs->CRB |= RODD | RXDE; 924 if (cfg.rburst) 925 sc->regs->CRB |= RDBE; 926 if (cfg.wburst) 927 sc->regs->CRB |= WTBE; 928 929 tsleep(sc, 0, "sbsh", 0); 930 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP) 931 return (-1); 932 933 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len)) 934 return (-1); 935 936 tsleep(sc, 0, "sbsh", 0); 937 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP) 938 return (-1); 939 940 t = cfg.master ? 1 : 9; 941 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1)) 942 return (-1); 943 944 t = 0x63; 945 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1)) 946 return (-1); 947 948 *(u_int16_t *)parm = cfg.lrate >> 3; 949 parm[2] = parm[3] = parm[0]; 950 parm[5] = cfg.lrate & 7; 951 parm[4] = parm[7] = 1; 952 parm[6] = 0; 953 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8)) 954 return (-1); 955 956 parm[0] = 0x02 | (cfg.mod << 4); 957 parm[1] = 0; 958 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2)) 959 return (-1); 960 961 bzero(parm, 12); 962 parm[0] = 0x04; /* pre-activation: G.hs */ 963 parm[4] = 0x04; /* no remote configuration */ 964 parm[7] = 0x01; /* annex A (default) */ 965 parm[8] = 0xff; /* i-bit mask (all bits) */ 966 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12)) 967 return (-1); 968 969 parm[0] = 0x03; /* dying gasp time - 3 frames */ 970 parm[1] = thresh[cfg.mod]; 971 parm[2] = 0xff; /* attenuation */ 972 parm[3] = 0x04; /* line probe NMR (+2 dB) */ 973 parm[4] = 0x00; /* reserved */ 974 parm[5] = 0x00; 975 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6)) 976 return (-1); 977 978 t = cfg.master ? 0x23 : 0x21; 979 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1)) 980 return (-1); 981 982 t = 0x02; 983 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1)) 984 return (-1); 985 986 sc->state = DOWN; 987 return (0); 988 } 989 990 static int 991 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len) 992 { 993 u_int32_t t; 994 int i; 995 u_int8_t cksum = 0; 996 997 for (i = 0; i < img_len; ++i) 998 cksum += img[i]; 999 1000 t = img_len; 1001 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4)) 1002 return (-1); 1003 1004 for (i = 0; img_len >= 75; i += 75, img_len -= 75) { 1005 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75)) 1006 return (-1); 1007 } 1008 1009 if (img_len 1010 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len)) 1011 return (-1); 1012 1013 t = (cksum ^ 0xff) + 1; 1014 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1)) 1015 return (-1); 1016 1017 return (0); 1018 } 1019 1020 static int 1021 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd, 1022 u_int8_t *data, u_int8_t size) 1023 { 1024 volatile struct cx28975_cmdarea *p = sc->cmdp; 1025 u_int8_t *databuf = p->in_data; 1026 int i; 1027 1028 u_int8_t cksum = 0; 1029 1030 p->in_dest = 0xf0; 1031 p->in_opcode = cmd; 1032 p->in_zero = 0; 1033 p->in_length = --size; 1034 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa; 1035 1036 for (i = 0; i <= size; ++i) { 1037 cksum ^= *data; 1038 *databuf++ = *data++; /* only 1 byte per cycle! */ 1039 } 1040 1041 p->in_datasum = cksum ^ 0xaa; 1042 p->out_ack = _ACK_NOT_COMPLETE; 1043 p->intr_8051 = 0xfe; 1044 1045 if (tsleep(sc, 0, "sbsh", hz << 3)) 1046 return (-1); 1047 1048 while (p->out_ack == _ACK_NOT_COMPLETE) 1049 ; /* FIXME ! */ 1050 1051 if ((p->out_ack & 0x1f) == _ACK_PASS) { 1052 p->out_ack = 0; 1053 return (0); 1054 } else { 1055 p->out_ack = 0; 1056 return (-1); 1057 } 1058 } 1059