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 1.11 2004/06/02 14:42:54 eirikn 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 <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 <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, s; 224 225 s = splimp(); 226 227 sc = device_get_softc(dev); 228 unit = device_get_unit(dev); 229 230 rid = PCIR_MAPS + 4; 231 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 232 0, ~0, 4096, RF_ACTIVE); 233 234 if (sc->mem_res == NULL) { 235 printf ("sbsh%d: couldn't map memory\n", unit); 236 error = ENXIO; 237 goto fail; 238 } 239 240 rid = 0; 241 sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, 242 RF_SHAREABLE | RF_ACTIVE); 243 244 if (sc->irq_res == NULL) { 245 printf("sbsh%d: couldn't map interrupt\n", unit); 246 bus_release_resource(dev, SYS_RES_MEMORY, 247 PCIR_MAPS + 4, sc->mem_res); 248 error = ENXIO; 249 goto fail; 250 } 251 252 sc->mem_base = rman_get_virtual(sc->mem_res); 253 init_card(sc); 254 255 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, 256 sbsh_intr, sc, &sc->intr_hand); 257 if (error) { 258 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 259 bus_release_resource(dev, SYS_RES_MEMORY, 260 PCIR_MAPS + 4, sc->mem_res); 261 printf("sbsh%d: couldn't set up irq\n", unit); 262 goto fail; 263 } 264 265 /* generate ethernet MAC address */ 266 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192); 267 read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2); 268 269 ifp = &sc->arpcom.ac_if; 270 ifp->if_softc = sc; 271 if_initname(ifp, "sbsh", unit); 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, sc->arpcom.ac_enaddr); 283 284 fail: 285 splx(s); 286 return (error); 287 } 288 289 static int 290 sbsh_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); 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 } 311 312 313 static void 314 sbsh_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 } 326 327 328 static void 329 sbsh_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 } 357 358 359 static void 360 sbsh_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 } 383 384 385 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 s, error = 0; 408 u_int8_t t; 409 410 s = splimp(); 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, 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; 475 476 case SIOCSIFADDR: 477 case SIOCGIFADDR: 478 case SIOCSIFMTU: 479 error = ether_ioctl(ifp, cmd, data); 480 break; 481 482 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; 503 504 default: 505 error = EINVAL; 506 break; 507 } 508 509 splx(s); 510 return (error); 511 } 512 513 514 static void 515 sbsh_shutdown(device_t dev) 516 { 517 struct sbsh_softc *sc = device_get_softc(dev); 518 519 sbsh_stop(sc); 520 } 521 522 static int 523 sbsh_suspend(device_t dev) 524 { 525 struct sbsh_softc *sc = device_get_softc(dev); 526 int s; 527 528 s = splimp(); 529 sbsh_stop(sc); 530 splx(s); 531 532 return (0); 533 } 534 535 static int 536 sbsh_resume(device_t dev) 537 { 538 struct sbsh_softc *sc = device_get_softc(dev); 539 struct ifnet *ifp; 540 int s; 541 542 s = splimp(); 543 ifp = &sc->arpcom.ac_if; 544 545 if (ifp->if_flags & IFF_UP) 546 sbsh_init(sc); 547 548 splx(s); 549 return (0); 550 } 551 552 553 static void 554 sbsh_watchdog(struct ifnet *ifp) 555 { 556 struct sbsh_softc *sc = ifp->if_softc; 557 558 if_printf(ifp, "transmit timeout\n"); 559 560 if (sc->regs->SR & TXS) { 561 sc->regs->SR = TXS; 562 if_printf(ifp, "interrupt posted but not delivered\n"); 563 } 564 free_sent_buffers(sc); 565 } 566 567 /* -------------------------------------------------------------------------- */ 568 569 static void 570 sbsh_intr(void *arg) 571 { 572 struct sbsh_softc *sc = (struct sbsh_softc *)arg; 573 u_int8_t status = sc->regs->SR; 574 575 if (status == 0) 576 return; 577 578 if (status & EXT) { 579 cx28975_interrupt(sc); 580 sc->regs->SR = EXT; 581 } 582 583 if (status & UFL) { 584 resume_tx(sc); 585 sc->regs->SR = UFL; 586 ++sc->in_stats.ufl_errs; 587 ++sc->arpcom.ac_if.if_oerrors; 588 } 589 590 if (status & RXS) { 591 sc->regs->SR = RXS; 592 indicate_frames(sc); 593 alloc_rx_buffers(sc); 594 } 595 596 if (status & TXS) { 597 sc->regs->SR = TXS; 598 free_sent_buffers(sc); 599 } 600 601 if (status & CRC) { 602 ++sc->in_stats.crc_errs; 603 ++sc->arpcom.ac_if.if_ierrors; 604 sc->regs->SR = CRC; 605 } 606 607 if (status & OFL) { 608 ++sc->in_stats.ofl_errs; 609 ++sc->arpcom.ac_if.if_ierrors; 610 sc->regs->SR = OFL; 611 } 612 } 613 614 /* 615 * Look for a first descriptor of a next packet, and write it's number 616 * into CTDR. Then enable the transmitter. 617 */ 618 static void 619 resume_tx(struct sbsh_softc *sc) 620 { 621 u_int32_t cur_tbd = sc->regs->CTDR; 622 623 while (cur_tbd != sc->regs->LTDR 624 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0) 625 ; 626 sc->regs->CTDR = cur_tbd; 627 sc->regs->CR |= TXEN; 628 } 629 630 static void 631 start_xmit_frames(struct sbsh_softc *sc) 632 { 633 struct ifnet *ifp = &sc->arpcom.ac_if; 634 struct mbuf *m; 635 636 /* 637 * Check if we have any free descriptor(s) and free space in 638 * our transmit queue. 639 */ 640 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1)) 641 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) { 642 643 IF_DEQUEUE(&ifp->if_snd, m); 644 if (!m) 645 break; 646 if (m->m_pkthdr.len) { 647 if (ifp->if_bpf) 648 bpf_mtap(ifp, m); 649 encap_frame(sc, m); 650 } else 651 m_freem(m); 652 } 653 654 if (sc->regs->CTDR != sc->regs->LTDR) 655 ifp->if_flags |= IFF_OACTIVE; 656 else 657 ifp->if_flags &= ~IFF_OACTIVE; 658 } 659 660 661 /* 662 * MUST be called at splimp 663 */ 664 static void 665 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head) 666 { 667 struct mbuf *m; 668 u_int32_t cur_tbd; 669 int done; 670 671 look_for_nonzero: 672 for (m = m_head; !m->m_len; m = m->m_next) 673 ; 674 675 cur_tbd = sc->regs->LTDR & 0x7f; 676 done = 0; 677 do { 678 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) { 679 if ((m_head = repack(sc, m_head)) != NULL) 680 goto look_for_nonzero; 681 else 682 return; 683 } 684 685 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t)); 686 sc->tbd[cur_tbd].length = m->m_len; 687 688 do { 689 m = m->m_next; 690 } while (m && !m->m_len); 691 692 if (!m) { /* last fragment has been reached */ 693 sc->tbd[cur_tbd].length |= LAST_FRAG; 694 done = 1; 695 } 696 697 ++cur_tbd; 698 cur_tbd &= 0x7f; 699 } while (!done); 700 701 sc->xq[sc->tail_xq++] = m_head; 702 sc->tail_xq &= (XQLEN - 1); 703 704 sc->regs->LTDR = cur_tbd; 705 ++sc->in_stats.sent_pkts; 706 ++sc->arpcom.ac_if.if_opackets; 707 } 708 709 static struct mbuf * 710 repack(struct sbsh_softc *sc, struct mbuf *m) 711 { 712 struct mbuf *m_new; 713 714 MGETHDR(m_new, MB_DONTWAIT, MT_DATA); 715 if (!m_new) { 716 if_printf (&sc->arpcom.ac_if, 717 "unable to get mbuf.\n"); 718 return (NULL); 719 } 720 721 if (m->m_pkthdr.len > MHLEN) { 722 MCLGET(m_new, MB_DONTWAIT); 723 if (!(m_new->m_flags & M_EXT)) { 724 m_freem(m_new); 725 if_printf (&sc->arpcom.ac_if, 726 "unable to get mbuf cluster.\n"); 727 return (NULL); 728 } 729 } 730 731 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t)); 732 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len; 733 m_freem(m); 734 return (m_new); 735 } 736 737 static void 738 free_sent_buffers(struct sbsh_softc *sc) 739 { 740 u_int32_t cur_tbd; 741 742 cur_tbd = sc->regs->CTDR; 743 744 while (sc->head_tdesc != cur_tbd) { 745 /* 746 * Be careful! one element in xq may correspond to 747 * multiple descriptors. 748 */ 749 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) { 750 m_freem(sc->xq[sc->head_xq++]); 751 sc->head_xq &= (XQLEN - 1); 752 } 753 754 sc->tbd[sc->head_tdesc].length = 0; 755 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f; 756 } 757 758 start_xmit_frames(sc); 759 } 760 761 /* 762 * DON'T use free_sent_buffers to drop the queue! 763 */ 764 static void 765 alloc_rx_buffers(struct sbsh_softc *sc) 766 { 767 unsigned cur_rbd = sc->regs->LRDR & 0x7f; 768 struct mbuf *m; 769 770 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) { 771 MGETHDR(m, MB_DONTWAIT, MT_DATA); 772 if (!m) { 773 if_printf (&sc->arpcom.ac_if, 774 "unable to get mbuf.\n"); 775 return; 776 } 777 778 if (SBNI16_MAX_FRAME > MHLEN) { 779 MCLGET(m, MB_DONTWAIT); 780 if (!(m->m_flags & M_EXT)) { 781 m_freem(m); 782 if_printf (&sc->arpcom.ac_if, 783 "unable to get mbuf cluster.\n"); 784 return; 785 } 786 m->m_pkthdr.len = m->m_len = MCLBYTES; 787 } 788 789 m_adj(m, 2); /* align ip on longword boundaries */ 790 791 sc->rq[sc->tail_rq++] = m; 792 sc->tail_rq &= (RQLEN - 1); 793 794 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t)); 795 sc->rbd[cur_rbd].length = 0; 796 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f; 797 } 798 } 799 800 static void 801 indicate_frames(struct sbsh_softc *sc) 802 { 803 struct ether_header *eh; 804 unsigned cur_rbd = sc->regs->CRDR & 0x7f; 805 806 while (sc->head_rdesc != cur_rbd) { 807 struct mbuf *m = sc->rq[sc->head_rq++]; 808 sc->head_rq &= (RQLEN - 1); 809 810 m->m_pkthdr.len = m->m_len = 811 sc->rbd[sc->head_rdesc].length & 0x7ff; 812 m->m_pkthdr.rcvif = &sc->arpcom.ac_if; 813 814 eh = mtod(m, struct ether_header *); 815 m_adj(m, sizeof(struct ether_header)); 816 ether_input(&sc->arpcom.ac_if, eh, m); 817 ++sc->in_stats.rcvd_pkts; 818 ++sc->arpcom.ac_if.if_ipackets; 819 820 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f; 821 } 822 } 823 824 static void 825 drop_queues(struct sbsh_softc *sc) 826 { 827 while (sc->head_rq != sc->tail_rq) { 828 m_freem(sc->rq[sc->head_rq++]); 829 sc->head_rq &= (RQLEN - 1); 830 } 831 832 while (sc->head_xq != sc->tail_xq) { 833 m_freem(sc->xq[sc->head_xq++]); 834 sc->head_xq &= (XQLEN - 1); 835 } 836 } 837 838 /* -------------------------------------------------------------------------- */ 839 840 static void 841 activate(struct sbsh_softc *sc) 842 { 843 struct timeval tv; 844 845 sc->regs->SR = 0xff; /* clear it! */ 846 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0; 847 848 sc->head_tdesc = sc->head_rdesc = 0; 849 alloc_rx_buffers(sc); 850 851 sc->regs->CRB &= ~RXDE; 852 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL; 853 sc->regs->CR |= TXEN | RXEN; 854 855 sc->state = ACTIVE; 856 ++sc->in_stats.attempts; 857 microtime(&tv); 858 sc->in_stats.last_time = tv.tv_sec; 859 start_xmit_frames(sc); 860 } 861 862 static void 863 deactivate(struct sbsh_softc *sc) 864 { 865 sc->regs->CR &= ~(RXEN | TXEN); 866 sc->regs->CRB |= RXDE; 867 sc->regs->IMR = EXT; 868 sc->regs->CTDR = sc->regs->LTDR; 869 sc->regs->CRDR = sc->regs->LRDR; 870 sc->state = ACTIVATION; 871 872 drop_queues(sc); 873 } 874 875 /* -------------------------------------------------------------------------- */ 876 877 static void 878 cx28975_interrupt(struct sbsh_softc *sc) 879 { 880 volatile struct cx28975_cmdarea *p = sc->cmdp; 881 u_int8_t t; 882 883 if (p->intr_host != 0xfe) 884 return; 885 886 if (p->out_ack & 0x80) { 887 if (*((volatile u_int8_t *)p + 0x3c7) & 2) { 888 if (sc->state != ACTIVE 889 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) { 890 activate(sc); 891 if_printf(&sc->arpcom.ac_if, "connected to peer\n"); 892 } else if (sc->state == ACTIVE 893 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) { 894 deactivate(sc); 895 if_printf(&sc->arpcom.ac_if, "carrier lost\n"); 896 } 897 } 898 899 p->intr_host = 0; 900 t = p->intr_host; 901 p->out_ack = 0; 902 } else { 903 wakeup(sc); 904 905 p->intr_host = 0; 906 t = p->intr_host; 907 } 908 } 909 910 /* -------------------------------------------------------------------------- */ 911 912 static int 913 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg) 914 { 915 static char thresh[] = { +8, -4, -16, -40 }; 916 917 volatile struct cx28975_cmdarea *p = sc->cmdp; 918 u_int8_t t, parm[12]; 919 920 p->intr_host = 0; 921 t = p->intr_host; 922 923 /* reset chip set */ 924 sc->regs->IMR = EXT; 925 sc->regs->CR = 0; 926 sc->regs->SR = 0xff; 927 DELAY(2); 928 sc->regs->CR = XRST; 929 if (cfg.crc16) 930 sc->regs->CR |= CMOD; 931 if (cfg.fill_7e) 932 sc->regs->CR |= FMOD; 933 if (cfg.inv) 934 sc->regs->CR |= PMOD; 935 936 sc->regs->CRB |= RODD | RXDE; 937 if (cfg.rburst) 938 sc->regs->CRB |= RDBE; 939 if (cfg.wburst) 940 sc->regs->CRB |= WTBE; 941 942 tsleep(sc, 0, "sbsh", 0); 943 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP) 944 return (-1); 945 946 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len)) 947 return (-1); 948 949 tsleep(sc, 0, "sbsh", 0); 950 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP) 951 return (-1); 952 953 t = cfg.master ? 1 : 9; 954 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1)) 955 return (-1); 956 957 t = 0x63; 958 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1)) 959 return (-1); 960 961 *(u_int16_t *)parm = cfg.lrate >> 3; 962 parm[2] = parm[3] = parm[0]; 963 parm[5] = cfg.lrate & 7; 964 parm[4] = parm[7] = 1; 965 parm[6] = 0; 966 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8)) 967 return (-1); 968 969 parm[0] = 0x02 | (cfg.mod << 4); 970 parm[1] = 0; 971 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2)) 972 return (-1); 973 974 bzero(parm, 12); 975 parm[0] = 0x04; /* pre-activation: G.hs */ 976 parm[4] = 0x04; /* no remote configuration */ 977 parm[7] = 0x01; /* annex A (default) */ 978 parm[8] = 0xff; /* i-bit mask (all bits) */ 979 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12)) 980 return (-1); 981 982 parm[0] = 0x03; /* dying gasp time - 3 frames */ 983 parm[1] = thresh[cfg.mod]; 984 parm[2] = 0xff; /* attenuation */ 985 parm[3] = 0x04; /* line probe NMR (+2 dB) */ 986 parm[4] = 0x00; /* reserved */ 987 parm[5] = 0x00; 988 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6)) 989 return (-1); 990 991 t = cfg.master ? 0x23 : 0x21; 992 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1)) 993 return (-1); 994 995 t = 0x02; 996 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1)) 997 return (-1); 998 999 sc->state = DOWN; 1000 return (0); 1001 } 1002 1003 static int 1004 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len) 1005 { 1006 u_int32_t t; 1007 int i; 1008 u_int8_t cksum = 0; 1009 1010 for (i = 0; i < img_len; ++i) 1011 cksum += img[i]; 1012 1013 t = img_len; 1014 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4)) 1015 return (-1); 1016 1017 for (i = 0; img_len >= 75; i += 75, img_len -= 75) { 1018 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75)) 1019 return (-1); 1020 } 1021 1022 if (img_len 1023 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len)) 1024 return (-1); 1025 1026 t = (cksum ^ 0xff) + 1; 1027 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1)) 1028 return (-1); 1029 1030 return (0); 1031 } 1032 1033 static int 1034 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd, 1035 u_int8_t *data, u_int8_t size) 1036 { 1037 volatile struct cx28975_cmdarea *p = sc->cmdp; 1038 u_int8_t *databuf = p->in_data; 1039 int i; 1040 1041 u_int8_t cksum = 0; 1042 1043 p->in_dest = 0xf0; 1044 p->in_opcode = cmd; 1045 p->in_zero = 0; 1046 p->in_length = --size; 1047 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa; 1048 1049 for (i = 0; i <= size; ++i) { 1050 cksum ^= *data; 1051 *databuf++ = *data++; /* only 1 byte per cycle! */ 1052 } 1053 1054 p->in_datasum = cksum ^ 0xaa; 1055 p->out_ack = _ACK_NOT_COMPLETE; 1056 p->intr_8051 = 0xfe; 1057 1058 if (tsleep(sc, 0, "sbsh", hz << 3)) 1059 return (-1); 1060 1061 while (p->out_ack == _ACK_NOT_COMPLETE) 1062 ; /* FIXME ! */ 1063 1064 if ((p->out_ack & 0x1f) == _ACK_PASS) { 1065 p->out_ack = 0; 1066 return (0); 1067 } else { 1068 p->out_ack = 0; 1069 return (-1); 1070 } 1071 } 1072