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sys/dev/sbsh/if_sbsh.c
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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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 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/module.h> 37 #include <sys/proc.h> 38 #include <sys/socket.h> 39 #include <sys/random.h> 40 #include <machine/clock.h> 41 #include <machine/stdarg.h> 42 43 #include <net/if.h> 44 #include <net/if_arp.h> 45 #include <net/ethernet.h> 46 #include <net/if_media.h> 47 48 #include <net/bpf.h> 49 50 #include <vm/vm.h> 51 #include <vm/pmap.h> 52 #include <machine/bus.h> 53 #include <machine/resource.h> 54 #include <sys/bus.h> 55 #include <sys/rman.h> 56 57 #include <dev/pci/pcireg.h> 58 #include <dev/pci/pcivar.h> 59 60 #include <dev/sbsh/if_sbshreg.h> 61 62 /* -------------------------------------------------------------------------- */ 63 64 struct sbni16_hw_regs { 65 u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR; 66 }; 67 68 struct hw_descr { 69 u_int32_t address; 70 u_int32_t length; 71 }; 72 73 struct cx28975_cmdarea { 74 u_int8_t intr_host; 75 u_int8_t intr_8051; 76 u_int8_t map_version; 77 78 u_int8_t in_dest; 79 u_int8_t in_opcode; 80 u_int8_t in_zero; 81 u_int8_t in_length; 82 u_int8_t in_csum; 83 u_int8_t in_data[75]; 84 u_int8_t in_datasum; 85 86 u_int8_t out_dest; 87 u_int8_t out_opcode; 88 u_int8_t out_ack; 89 u_int8_t out_length; 90 u_int8_t out_csum; 91 u_int8_t out_data[75]; 92 u_int8_t out_datasum; 93 }; 94 95 #define XQLEN 8 96 #define RQLEN 8 97 98 struct sbsh_softc { 99 struct arpcom arpcom; /* ethernet common */ 100 101 struct resource *mem_res; 102 struct resource *irq_res; 103 void *intr_hand; 104 105 void *mem_base; /* mapped memory address */ 106 107 volatile struct sbni16_hw_regs *regs; 108 volatile struct hw_descr *tbd; 109 volatile struct hw_descr *rbd; 110 volatile struct cx28975_cmdarea *cmdp; 111 112 /* SBNI16 controller statistics */ 113 struct sbni16_stats { 114 u_int32_t sent_pkts, rcvd_pkts; 115 u_int32_t crc_errs, ufl_errs, ofl_errs, attempts, last_time; 116 } in_stats; 117 118 /* transmit and reception queues */ 119 struct mbuf *xq[XQLEN], *rq[RQLEN]; 120 unsigned head_xq, tail_xq, head_rq, tail_rq; 121 122 /* the descriptors mapped onto the first buffers in xq and rq */ 123 unsigned head_tdesc, head_rdesc; 124 u_int8_t state; 125 }; 126 127 struct cx28975_cfg { 128 u_int8_t *firmw_image; 129 u_int32_t firmw_len; 130 u_int32_t lrate: 10; 131 u_int32_t master: 1; 132 u_int32_t mod: 2; 133 u_int32_t crc16: 1; 134 u_int32_t fill_7e: 1; 135 u_int32_t inv: 1; 136 u_int32_t rburst: 1; 137 u_int32_t wburst: 1; 138 u_int32_t : 14; 139 }; 140 141 /* SHDSL transceiver statistics */ 142 struct dsl_stats { 143 u_int8_t status_1, status_3; 144 u_int8_t attenuat, nmr, tpbo, rpbo; 145 u_int16_t losw, segd, crc, sega, losd; 146 }; 147 148 enum State { NOT_LOADED, DOWN, ACTIVATION, ACTIVE }; 149 150 #define SIOCLOADFIRMW _IOWR('i', 67, struct ifreq) 151 #define SIOCGETSTATS _IOWR('i', 68, struct ifreq) 152 #define SIOCCLRSTATS _IOWR('i', 69, struct ifreq) 153 154 static int sbsh_probe(device_t); 155 static int sbsh_attach(device_t); 156 static int sbsh_detach(device_t); 157 static int sbsh_ioctl(struct ifnet *, u_long, caddr_t); 158 static void sbsh_shutdown(device_t); 159 static int sbsh_suspend(device_t); 160 static int sbsh_resume(device_t); 161 static void sbsh_watchdog(struct ifnet *); 162 163 static void sbsh_start(struct ifnet *); 164 static void sbsh_init(void *); 165 static void sbsh_stop(struct sbsh_softc *); 166 static void init_card(struct sbsh_softc *); 167 static void sbsh_intr(void *); 168 static void resume_tx(struct sbsh_softc *); 169 static void start_xmit_frames(struct sbsh_softc *); 170 static void encap_frame(struct sbsh_softc *, struct mbuf *); 171 static struct mbuf * repack(struct sbsh_softc *, struct mbuf *); 172 static void free_sent_buffers(struct sbsh_softc *); 173 static void alloc_rx_buffers(struct sbsh_softc *); 174 static void indicate_frames(struct sbsh_softc *); 175 static void drop_queues(struct sbsh_softc *); 176 static void activate(struct sbsh_softc *); 177 static void deactivate(struct sbsh_softc *); 178 static void cx28975_interrupt(struct sbsh_softc *); 179 static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg); 180 static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t); 181 static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t, 182 u_int8_t *, u_int8_t); 183 184 static device_method_t sbsh_methods[] = { 185 /* Device interface */ 186 DEVMETHOD(device_probe, sbsh_probe), 187 DEVMETHOD(device_attach, sbsh_attach), 188 DEVMETHOD(device_detach, sbsh_detach), 189 DEVMETHOD(device_shutdown, sbsh_shutdown), 190 DEVMETHOD(device_suspend, sbsh_suspend), 191 DEVMETHOD(device_resume, sbsh_resume), 192 193 { 0, 0 } 194 }; 195 196 static driver_t sbsh_driver = { 197 "sbsh", 198 sbsh_methods, 199 sizeof(struct sbsh_softc) 200 }; 201 202 static devclass_t sbsh_devclass; 203 204 DRIVER_MODULE(sbsh, pci, sbsh_driver, sbsh_devclass, 0, 0); 205 MODULE_DEPEND(sbsh, pci, 1, 1, 1); 206 207 static int 208 sbsh_probe(device_t dev) 209 { 210 if (pci_get_vendor(dev) != SBNI16_VENDOR 211 || pci_get_device(dev) != SBNI16_DEVICE 212 || pci_get_subdevice(dev) != SBNI16_SUBDEV) 213 return (ENXIO); 214 215 device_set_desc(dev, "Granch SBNI16 G.SHDSL Modem"); 216 return (0); 217 } 218 219 static int 220 sbsh_attach(device_t dev) 221 { 222 struct sbsh_softc *sc; 223 struct ifnet *ifp; 224 int unit, error = 0, rid, s; 225 226 s = splimp(); 227 228 sc = device_get_softc(dev); 229 unit = device_get_unit(dev); 230 231 rid = PCIR_BAR(1); 232 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 233 0, ~0, 4096, RF_ACTIVE); 234 235 if (sc->mem_res == NULL) { 236 printf ("sbsh%d: couldn't map memory\n", unit); 237 error = ENXIO; 238 goto fail; 239 } 240 241 rid = 0; 242 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 243 RF_SHAREABLE | RF_ACTIVE); 244 245 if (sc->irq_res == NULL) { 246 printf("sbsh%d: couldn't map interrupt\n", unit); 247 bus_release_resource(dev, SYS_RES_MEMORY, 248 PCIR_BAR(1), sc->mem_res); 249 error = ENXIO; 250 goto fail; 251 } 252 253 sc->mem_base = rman_get_virtual(sc->mem_res); 254 init_card(sc); 255 256 error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, 257 sbsh_intr, sc, &sc->intr_hand); 258 if (error) { 259 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 260 bus_release_resource(dev, SYS_RES_MEMORY, 261 PCIR_BAR(1), sc->mem_res); 262 printf("sbsh%d: couldn't set up irq\n", unit); 263 goto fail; 264 } 265 266 /* generate ethernet MAC address */ 267 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192); 268 read_random(sc->arpcom.ac_enaddr + 4, 2); 269 270 ifp = &sc->arpcom.ac_if; 271 ifp->if_softc = sc; 272 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 273 ifp->if_mtu = ETHERMTU; 274 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST | 275 IFF_NEEDSGIANT; 276 ifp->if_ioctl = sbsh_ioctl; 277 ifp->if_start = sbsh_start; 278 ifp->if_watchdog = sbsh_watchdog; 279 ifp->if_init = sbsh_init; 280 ifp->if_baudrate = 4600000; 281 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN; 282 283 ether_ifattach(ifp, sc->arpcom.ac_enaddr); 284 285 fail: 286 splx(s); 287 return (error); 288 } 289 290 static int 291 sbsh_detach(device_t dev) 292 { 293 struct sbsh_softc *sc; 294 struct ifnet *ifp; 295 int s; 296 297 s = splimp(); 298 299 sc = device_get_softc(dev); 300 ifp = &sc->arpcom.ac_if; 301 302 sbsh_stop(sc); 303 ether_ifdetach(ifp); 304 305 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand); 306 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 307 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_BAR(1), sc->mem_res); 308 309 splx(s); 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 int s; 319 320 if (sc->state != ACTIVE) 321 return; 322 323 s = splimp(); 324 start_xmit_frames(ifp->if_softc); 325 splx(s); 326 } 327 328 329 static void 330 sbsh_init(void *xsc) 331 { 332 struct sbsh_softc *sc = xsc; 333 struct ifnet *ifp = &sc->arpcom.ac_if; 334 int s; 335 u_int8_t t; 336 337 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) 338 return; 339 340 s = splimp(); 341 342 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 343 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0; 344 sc->head_tdesc = sc->head_rdesc = 0; 345 346 sc->regs->IMR = EXT; 347 t = 2; 348 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1); 349 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) { 350 sc->state = ACTIVATION; 351 352 ifp->if_flags |= IFF_RUNNING; 353 ifp->if_flags &= ~IFF_OACTIVE; 354 } 355 356 splx(s); 357 } 358 359 360 static void 361 sbsh_stop(struct sbsh_softc *sc) 362 { 363 int s; 364 u_int8_t t; 365 366 s = splimp(); 367 sc->regs->IMR = EXT; 368 369 t = 0; 370 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1); 371 if (sc->state == ACTIVE) { 372 t = 1; 373 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1); 374 /* FIX! activation manager state */ 375 376 /* Is it really must be done here? It calls from intr handler */ 377 deactivate(sc); 378 } 379 380 sc->regs->IMR = 0; 381 sc->state = DOWN; 382 splx(s); 383 } 384 385 386 static void 387 init_card(struct sbsh_softc *sc) 388 { 389 sc->state = NOT_LOADED; 390 sc->tbd = (struct hw_descr *) sc->mem_base; 391 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400); 392 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800); 393 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00); 394 395 sc->regs->CR = 0; 396 sc->regs->SR = 0xff; 397 sc->regs->IMR = 0; 398 } 399 400 401 static int 402 sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 403 { 404 struct sbsh_softc *sc = ifp->if_softc; 405 struct ifreq *ifr = (struct ifreq *) data; 406 struct cx28975_cfg cfg; 407 struct dsl_stats ds; 408 409 int s, error = 0; 410 u_int8_t t; 411 412 s = splimp(); 413 414 switch(cmd) { 415 case SIOCLOADFIRMW: 416 if ((error = suser(curthread)) != 0) 417 break; 418 if (ifp->if_flags & IFF_UP) 419 error = EBUSY; 420 421 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg); 422 if (start_cx28975(sc, cfg) == 0) { 423 static char *modstr[] = { 424 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" }; 425 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n", 426 cfg.master ? "master" : "slave", 427 cfg.lrate << 3, modstr[cfg.mod]); 428 } else { 429 if_printf(&sc->arpcom.ac_if, 430 "unable to load firmware\n"); 431 error = EIO; 432 } 433 break; 434 435 case SIOCGETSTATS : 436 if ((error = suser(curthread)) != 0) 437 break; 438 439 t = 0; 440 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1)) 441 error = EIO; 442 ds.attenuat = sc->cmdp->out_data[0]; 443 444 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1)) 445 error = EIO; 446 ds.nmr = sc->cmdp->out_data[0]; 447 448 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1)) 449 error = EIO; 450 ds.tpbo = sc->cmdp->out_data[0]; 451 ds.rpbo = sc->cmdp->out_data[1]; 452 453 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) { 454 int i; 455 for (i = 0; i < 10; ++i) 456 ((u_int8_t *) &ds.losw)[i] = 457 sc->cmdp->out_data[i]; 458 } else 459 error = EIO; 460 461 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0]; 462 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2]; 463 464 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats)); 465 bcopy(&ds, ifr->ifr_data + sizeof(struct sbni16_stats), 466 sizeof(struct dsl_stats)); 467 break; 468 469 case SIOCCLRSTATS : 470 if (!(error = suser(curthread))) { 471 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 472 t = 2; 473 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1)) 474 error = EIO; 475 } 476 break; 477 478 case SIOCSIFFLAGS: 479 if (ifp->if_flags & IFF_UP) { 480 if (!(ifp->if_flags & IFF_RUNNING)) { 481 if (sc->state == NOT_LOADED) { 482 if_printf(ifp, "firmware wasn't loaded\n"); 483 error = EBUSY; 484 } else 485 sbsh_init(sc); 486 } 487 } else { 488 if (ifp->if_flags & IFF_RUNNING) { 489 sbsh_stop(sc); 490 ifp->if_flags &= ~IFF_RUNNING; 491 } 492 } 493 break; 494 495 case SIOCADDMULTI: 496 case SIOCDELMULTI: 497 error = 0; 498 break; 499 500 default: 501 error = ether_ioctl(ifp, cmd, data); 502 break; 503 } 504 505 splx(s); 506 return (error); 507 } 508 509 510 static void 511 sbsh_shutdown(device_t dev) 512 { 513 struct sbsh_softc *sc = device_get_softc(dev); 514 515 sbsh_stop(sc); 516 } 517 518 static int 519 sbsh_suspend(device_t dev) 520 { 521 struct sbsh_softc *sc = device_get_softc(dev); 522 int s; 523 524 s = splimp(); 525 sbsh_stop(sc); 526 splx(s); 527 528 return (0); 529 } 530 531 static int 532 sbsh_resume(device_t dev) 533 { 534 struct sbsh_softc *sc = device_get_softc(dev); 535 struct ifnet *ifp; 536 int s; 537 538 s = splimp(); 539 ifp = &sc->arpcom.ac_if; 540 541 if (ifp->if_flags & IFF_UP) 542 sbsh_init(sc); 543 544 splx(s); 545 return (0); 546 } 547 548 549 static void 550 sbsh_watchdog(struct ifnet *ifp) 551 { 552 struct sbsh_softc *sc = ifp->if_softc; 553 554 if_printf(ifp, "transmit timeout\n"); 555 556 if (sc->regs->SR & TXS) { 557 sc->regs->SR = TXS; 558 if_printf(ifp, "interrupt posted but not delivered\n"); 559 } 560 free_sent_buffers(sc); 561 } 562 563 /* -------------------------------------------------------------------------- */ 564 565 static void 566 sbsh_intr(void *arg) 567 { 568 struct sbsh_softc *sc = (struct sbsh_softc *)arg; 569 u_int8_t status = sc->regs->SR; 570 571 if (status == 0) 572 return; 573 574 if (status & EXT) { 575 cx28975_interrupt(sc); 576 sc->regs->SR = EXT; 577 } 578 579 if (status & UFL) { 580 resume_tx(sc); 581 sc->regs->SR = UFL; 582 ++sc->in_stats.ufl_errs; 583 ++sc->arpcom.ac_if.if_oerrors; 584 } 585 586 if (status & RXS) { 587 sc->regs->SR = RXS; 588 indicate_frames(sc); 589 alloc_rx_buffers(sc); 590 } 591 592 if (status & TXS) { 593 sc->regs->SR = TXS; 594 free_sent_buffers(sc); 595 } 596 597 if (status & CRC) { 598 ++sc->in_stats.crc_errs; 599 ++sc->arpcom.ac_if.if_ierrors; 600 sc->regs->SR = CRC; 601 } 602 603 if (status & OFL) { 604 ++sc->in_stats.ofl_errs; 605 ++sc->arpcom.ac_if.if_ierrors; 606 sc->regs->SR = OFL; 607 } 608 } 609 610 /* 611 * Look for a first descriptor of a next packet, and write it's number 612 * into CTDR. Then enable the transmitter. 613 */ 614 static void 615 resume_tx(struct sbsh_softc *sc) 616 { 617 u_int32_t cur_tbd = sc->regs->CTDR; 618 619 while (cur_tbd != sc->regs->LTDR 620 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0) 621 ; 622 sc->regs->CTDR = cur_tbd; 623 sc->regs->CR |= TXEN; 624 } 625 626 static void 627 start_xmit_frames(struct sbsh_softc *sc) 628 { 629 struct ifnet *ifp = &sc->arpcom.ac_if; 630 struct mbuf *m; 631 632 /* 633 * Check if we have any free descriptor(s) and free space in 634 * our transmit queue. 635 */ 636 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1)) 637 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) { 638 639 IF_DEQUEUE(&ifp->if_snd, m); 640 if (!m) 641 break; 642 if (m->m_pkthdr.len) { 643 BPF_MTAP(ifp, m); 644 encap_frame(sc, m); 645 } else 646 m_freem(m); 647 } 648 649 if (sc->regs->CTDR != sc->regs->LTDR) 650 ifp->if_flags |= IFF_OACTIVE; 651 else 652 ifp->if_flags &= ~IFF_OACTIVE; 653 } 654 655 656 /* 657 * MUST be called at splimp 658 */ 659 static void 660 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head) 661 { 662 struct mbuf *m; 663 u_int32_t cur_tbd; 664 int done; 665 666 look_for_nonzero: 667 for (m = m_head; !m->m_len; m = m->m_next) 668 ; 669 670 cur_tbd = sc->regs->LTDR & 0x7f; 671 done = 0; 672 do { 673 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) { 674 if ((m_head = repack(sc, m_head)) != NULL) 675 goto look_for_nonzero; 676 else 677 return; 678 } 679 680 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t)); 681 sc->tbd[cur_tbd].length = m->m_len; 682 683 do { 684 m = m->m_next; 685 } while (m && !m->m_len); 686 687 if (!m) { /* last fragment has been reached */ 688 sc->tbd[cur_tbd].length |= LAST_FRAG; 689 done = 1; 690 } 691 692 ++cur_tbd; 693 cur_tbd &= 0x7f; 694 } while (!done); 695 696 sc->xq[sc->tail_xq++] = m_head; 697 sc->tail_xq &= (XQLEN - 1); 698 699 sc->regs->LTDR = cur_tbd; 700 ++sc->in_stats.sent_pkts; 701 ++sc->arpcom.ac_if.if_opackets; 702 } 703 704 static struct mbuf * 705 repack(struct sbsh_softc *sc, struct mbuf *m) 706 { 707 struct mbuf *m_new; 708 709 MGETHDR(m_new, M_DONTWAIT, MT_DATA); 710 if (!m_new) { 711 if_printf (&sc->arpcom.ac_if, 712 "unable to get mbuf.\n"); 713 return (NULL); 714 } 715 716 if (m->m_pkthdr.len > MHLEN) { 717 MCLGET(m_new, M_DONTWAIT); 718 if (!(m_new->m_flags & M_EXT)) { 719 m_freem(m_new); 720 if_printf (&sc->arpcom.ac_if, 721 "unable to get mbuf cluster.\n"); 722 return (NULL); 723 } 724 } 725 726 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t)); 727 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len; 728 m_freem(m); 729 return (m_new); 730 } 731 732 static void 733 free_sent_buffers(struct sbsh_softc *sc) 734 { 735 u_int32_t cur_tbd; 736 737 cur_tbd = sc->regs->CTDR; 738 739 while (sc->head_tdesc != cur_tbd) { 740 /* 741 * Be careful! one element in xq may correspond to 742 * multiple descriptors. 743 */ 744 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) { 745 m_freem(sc->xq[sc->head_xq++]); 746 sc->head_xq &= (XQLEN - 1); 747 } 748 749 sc->tbd[sc->head_tdesc].length = 0; 750 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f; 751 } 752 753 start_xmit_frames(sc); 754 } 755 756 /* 757 * DON'T use free_sent_buffers to drop the queue! 758 */ 759 static void 760 alloc_rx_buffers(struct sbsh_softc *sc) 761 { 762 unsigned cur_rbd = sc->regs->LRDR & 0x7f; 763 struct mbuf *m; 764 765 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) { 766 MGETHDR(m, M_DONTWAIT, MT_DATA); 767 if (!m) { 768 if_printf (&sc->arpcom.ac_if, 769 "unable to get mbuf.\n"); 770 return; 771 } 772 773 if (SBNI16_MAX_FRAME > MHLEN) { 774 MCLGET(m, M_DONTWAIT); 775 if (!(m->m_flags & M_EXT)) { 776 m_freem(m); 777 if_printf (&sc->arpcom.ac_if, 778 "unable to get mbuf cluster.\n"); 779 return; 780 } 781 m->m_pkthdr.len = m->m_len = MCLBYTES; 782 } 783 784 m_adj(m, 2); /* align ip on longword boundaries */ 785 786 sc->rq[sc->tail_rq++] = m; 787 sc->tail_rq &= (RQLEN - 1); 788 789 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t)); 790 sc->rbd[cur_rbd].length = 0; 791 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f; 792 } 793 } 794 795 static void 796 indicate_frames(struct sbsh_softc *sc) 797 { 798 unsigned cur_rbd = sc->regs->CRDR & 0x7f; 799 800 while (sc->head_rdesc != cur_rbd) { 801 struct mbuf *m = sc->rq[sc->head_rq++]; 802 sc->head_rq &= (RQLEN - 1); 803 804 m->m_pkthdr.len = m->m_len = 805 sc->rbd[sc->head_rdesc].length & 0x7ff; 806 m->m_pkthdr.rcvif = &sc->arpcom.ac_if; 807 808 (*sc->arpcom.ac_if.if_input)(&sc->arpcom.ac_if, m); 809 ++sc->in_stats.rcvd_pkts; 810 ++sc->arpcom.ac_if.if_ipackets; 811 812 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f; 813 } 814 } 815 816 static void 817 drop_queues(struct sbsh_softc *sc) 818 { 819 while (sc->head_rq != sc->tail_rq) { 820 m_freem(sc->rq[sc->head_rq++]); 821 sc->head_rq &= (RQLEN - 1); 822 } 823 824 while (sc->head_xq != sc->tail_xq) { 825 m_freem(sc->xq[sc->head_xq++]); 826 sc->head_xq &= (XQLEN - 1); 827 } 828 } 829 830 /* -------------------------------------------------------------------------- */ 831 832 static void 833 activate(struct sbsh_softc *sc) 834 { 835 struct timeval tv; 836 837 sc->regs->SR = 0xff; /* clear it! */ 838 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0; 839 840 sc->head_tdesc = sc->head_rdesc = 0; 841 alloc_rx_buffers(sc); 842 843 sc->regs->CRB &= ~RXDE; 844 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL; 845 sc->regs->CR |= TXEN | RXEN; 846 847 sc->state = ACTIVE; 848 ++sc->in_stats.attempts; 849 microtime(&tv); 850 sc->in_stats.last_time = tv.tv_sec; 851 start_xmit_frames(sc); 852 } 853 854 static void 855 deactivate(struct sbsh_softc *sc) 856 { 857 sc->regs->CR &= ~(RXEN | TXEN); 858 sc->regs->CRB |= RXDE; 859 sc->regs->IMR = EXT; 860 sc->regs->CTDR = sc->regs->LTDR; 861 sc->regs->CRDR = sc->regs->LRDR; 862 sc->state = ACTIVATION; 863 864 drop_queues(sc); 865 } 866 867 /* -------------------------------------------------------------------------- */ 868 869 static void 870 cx28975_interrupt(struct sbsh_softc *sc) 871 { 872 volatile struct cx28975_cmdarea *p = sc->cmdp; 873 u_int8_t t; 874 875 if (p->intr_host != 0xfe) 876 return; 877 878 if (p->out_ack & 0x80) { 879 if (*((volatile u_int8_t *)p + 0x3c7) & 2) { 880 if (sc->state != ACTIVE 881 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) { 882 activate(sc); 883 if_printf(&sc->arpcom.ac_if, "connected to peer\n"); 884 } else if (sc->state == ACTIVE 885 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) { 886 deactivate(sc); 887 if_printf(&sc->arpcom.ac_if, "carrier lost\n"); 888 } 889 } 890 891 p->intr_host = 0; 892 t = p->intr_host; 893 p->out_ack = 0; 894 } else { 895 wakeup(sc); 896 897 p->intr_host = 0; 898 t = p->intr_host; 899 } 900 } 901 902 /* -------------------------------------------------------------------------- */ 903 904 static int 905 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg) 906 { 907 static char thresh[] = { +8, -4, -16, -40 }; 908 909 volatile struct cx28975_cmdarea *p = sc->cmdp; 910 u_int8_t t, parm[12]; 911 912 p->intr_host = 0; 913 t = p->intr_host; 914 915 /* reset chip set */ 916 sc->regs->IMR = EXT; 917 sc->regs->CR = 0; 918 sc->regs->SR = 0xff; 919 DELAY(2); 920 sc->regs->CR = XRST; 921 if (cfg.crc16) 922 sc->regs->CR |= CMOD; 923 if (cfg.fill_7e) 924 sc->regs->CR |= FMOD; 925 if (cfg.inv) 926 sc->regs->CR |= PMOD; 927 928 sc->regs->CRB |= RODD | RXDE; 929 if (cfg.rburst) 930 sc->regs->CRB |= RDBE; 931 if (cfg.wburst) 932 sc->regs->CRB |= WTBE; 933 934 tsleep(sc, PWAIT, "sbsh", 0); 935 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP) 936 return (-1); 937 938 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len)) 939 return (-1); 940 941 tsleep(sc, PWAIT, "sbsh", 0); 942 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP) 943 return (-1); 944 945 t = cfg.master ? 1 : 9; 946 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1)) 947 return (-1); 948 949 t = 0x63; 950 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1)) 951 return (-1); 952 953 *(u_int16_t *)parm = cfg.lrate >> 3; 954 parm[2] = parm[3] = parm[0]; 955 parm[5] = cfg.lrate & 7; 956 parm[4] = parm[7] = 1; 957 parm[6] = 0; 958 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8)) 959 return (-1); 960 961 parm[0] = 0x02 | (cfg.mod << 4); 962 parm[1] = 0; 963 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2)) 964 return (-1); 965 966 bzero(parm, 12); 967 parm[0] = 0x04; /* pre-activation: G.hs */ 968 parm[4] = 0x04; /* no remote configuration */ 969 parm[7] = 0x01; /* annex A (default) */ 970 parm[8] = 0xff; /* i-bit mask (all bits) */ 971 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12)) 972 return (-1); 973 974 parm[0] = 0x03; /* dying gasp time - 3 frames */ 975 parm[1] = thresh[cfg.mod]; 976 parm[2] = 0xff; /* attenuation */ 977 parm[3] = 0x04; /* line probe NMR (+2 dB) */ 978 parm[4] = 0x00; /* reserved */ 979 parm[5] = 0x00; 980 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6)) 981 return (-1); 982 983 t = cfg.master ? 0x23 : 0x21; 984 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1)) 985 return (-1); 986 987 t = 0x02; 988 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1)) 989 return (-1); 990 991 sc->state = DOWN; 992 return (0); 993 } 994 995 static int 996 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len) 997 { 998 u_int32_t t; 999 int i; 1000 u_int8_t cksum = 0; 1001 1002 for (i = 0; i < img_len; ++i) 1003 cksum += img[i]; 1004 1005 t = img_len; 1006 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4)) 1007 return (-1); 1008 1009 for (i = 0; img_len >= 75; i += 75, img_len -= 75) { 1010 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75)) 1011 return (-1); 1012 } 1013 1014 if (img_len 1015 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len)) 1016 return (-1); 1017 1018 t = (cksum ^ 0xff) + 1; 1019 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1)) 1020 return (-1); 1021 1022 return (0); 1023 } 1024 1025 static int 1026 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd, 1027 u_int8_t *data, u_int8_t size) 1028 { 1029 volatile struct cx28975_cmdarea *p = sc->cmdp; 1030 u_int8_t *databuf = p->in_data; 1031 int i; 1032 1033 u_int8_t cksum = 0; 1034 1035 p->in_dest = 0xf0; 1036 p->in_opcode = cmd; 1037 p->in_zero = 0; 1038 p->in_length = --size; 1039 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa; 1040 1041 for (i = 0; i <= size; ++i) { 1042 cksum ^= *data; 1043 *databuf++ = *data++; /* only 1 byte per cycle! */ 1044 } 1045 1046 p->in_datasum = cksum ^ 0xaa; 1047 p->out_ack = _ACK_NOT_COMPLETE; 1048 p->intr_8051 = 0xfe; 1049 1050 if (tsleep(sc, PWAIT, "sbsh", hz << 3)) 1051 return (-1); 1052 1053 while (p->out_ack == _ACK_NOT_COMPLETE) 1054 ; /* FIXME ! */ 1055 1056 if ((p->out_ack & 0x1f) == _ACK_PASS) { 1057 p->out_ack = 0; 1058 return (0); 1059 } else { 1060 p->out_ack = 0; 1061 return (-1); 1062 } 1063 }
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