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 1.23 2005/12/31 14:08:00 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/thread2.h> 41 42 #include <net/if.h> 43 #include <net/ifq_var.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 <bus/pci/pcireg.h> 58 #include <bus/pci/pcivar.h> 59 60 #include "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, struct ucred *); 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 DECLARE_DUMMY_MODULE(if_sbsh); 205 DRIVER_MODULE(if_sbsh, pci, sbsh_driver, sbsh_devclass, 0, 0); 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; 225 226 sc = device_get_softc(dev); 227 unit = device_get_unit(dev); 228 229 rid = PCIR_MAPS + 4; 230 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 231 0, ~0, 4096, RF_ACTIVE); 232 233 if (sc->mem_res == NULL) { 234 printf ("sbsh%d: couldn't map memory\n", unit); 235 error = ENXIO; 236 goto fail; 237 } 238 239 rid = 0; 240 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 241 RF_SHAREABLE | RF_ACTIVE); 242 243 if (sc->irq_res == NULL) { 244 printf("sbsh%d: couldn't map interrupt\n", unit); 245 error = ENXIO; 246 goto fail; 247 } 248 249 sc->mem_base = rman_get_virtual(sc->mem_res); 250 init_card(sc); 251 /* generate ethernet MAC address */ 252 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192); 253 read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2); 254 255 ifp = &sc->arpcom.ac_if; 256 ifp->if_softc = sc; 257 if_initname(ifp, "sbsh", unit); 258 ifp->if_mtu = ETHERMTU; 259 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 260 ifp->if_ioctl = sbsh_ioctl; 261 ifp->if_start = sbsh_start; 262 ifp->if_watchdog = sbsh_watchdog; 263 ifp->if_init = sbsh_init; 264 ifp->if_baudrate = 4600000; 265 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 266 ifq_set_ready(&ifp->if_snd); 267 268 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL); 269 270 error = bus_setup_intr(dev, sc->irq_res, INTR_NETSAFE, 271 sbsh_intr, sc, &sc->intr_hand, 272 ifp->if_serializer); 273 if (error) { 274 ether_ifdetach(ifp); 275 printf("sbsh%d: couldn't set up irq\n", unit); 276 goto fail; 277 } 278 279 return(0); 280 281 fail: 282 sbsh_detach(dev); 283 return (error); 284 } 285 286 static int 287 sbsh_detach(device_t dev) 288 { 289 struct sbsh_softc *sc = device_get_softc(dev); 290 struct ifnet *ifp = &sc->arpcom.ac_if; 291 292 if (device_is_attached(dev)) { 293 lwkt_serialize_enter(ifp->if_serializer); 294 sbsh_stop(sc); 295 bus_teardown_intr(dev, sc->irq_res, sc->intr_hand); 296 lwkt_serialize_exit(ifp->if_serializer); 297 298 ether_ifdetach(ifp); 299 } 300 301 if (sc->irq_res) 302 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irq_res); 303 if (sc->mem_res) { 304 bus_release_resource(dev, SYS_RES_MEMORY, PCIR_MAPS + 4, 305 sc->mem_res); 306 } 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 if (sc->state == ACTIVE) 318 start_xmit_frames(ifp->if_softc); 319 } 320 321 322 static void 323 sbsh_init(void *xsc) 324 { 325 struct sbsh_softc *sc = xsc; 326 struct ifnet *ifp = &sc->arpcom.ac_if; 327 u_int8_t t; 328 329 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) { 330 return; 331 } 332 333 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 334 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0; 335 sc->head_tdesc = sc->head_rdesc = 0; 336 337 sc->regs->IMR = EXT; 338 t = 2; 339 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1); 340 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) { 341 sc->state = ACTIVATION; 342 343 ifp->if_flags |= IFF_RUNNING; 344 ifp->if_flags &= ~IFF_OACTIVE; 345 } 346 } 347 348 349 static void 350 sbsh_stop(struct sbsh_softc *sc) 351 { 352 u_int8_t t; 353 354 sc->regs->IMR = EXT; 355 356 t = 0; 357 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1); 358 if (sc->state == ACTIVE) { 359 t = 1; 360 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1); 361 /* FIX! activation manager state */ 362 363 /* Is it really must be done here? It calls from intr handler */ 364 deactivate(sc); 365 } 366 367 sc->regs->IMR = 0; 368 sc->state = DOWN; 369 } 370 371 372 static void 373 init_card(struct sbsh_softc *sc) 374 { 375 sc->state = NOT_LOADED; 376 sc->tbd = (struct hw_descr *) sc->mem_base; 377 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400); 378 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800); 379 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00); 380 381 sc->regs->CR = 0; 382 sc->regs->SR = 0xff; 383 sc->regs->IMR = 0; 384 } 385 386 387 static int 388 sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 389 { 390 struct sbsh_softc *sc = ifp->if_softc; 391 struct ifreq *ifr = (struct ifreq *) data; 392 struct cx28975_cfg cfg; 393 struct dsl_stats ds; 394 int error = 0; 395 u_int8_t t; 396 397 switch(cmd) { 398 case SIOCLOADFIRMW: 399 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0) 400 break; 401 if (ifp->if_flags & IFF_UP) 402 error = EBUSY; 403 404 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg); 405 if (start_cx28975(sc, cfg) == 0) { 406 static char *modstr[] = { 407 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" }; 408 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n", 409 cfg.master ? "master" : "slave", 410 cfg.lrate << 3, modstr[cfg.mod]); 411 } else { 412 if_printf(&sc->arpcom.ac_if, 413 "unable to load firmware\n"); 414 error = EIO; 415 } 416 break; 417 418 case SIOCGETSTATS : 419 if ((error = suser_cred(cr, NULL_CRED_OKAY)) != 0) 420 break; 421 422 t = 0; 423 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1)) 424 error = EIO; 425 ds.attenuat = sc->cmdp->out_data[0]; 426 427 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1)) 428 error = EIO; 429 ds.nmr = sc->cmdp->out_data[0]; 430 431 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1)) 432 error = EIO; 433 ds.tpbo = sc->cmdp->out_data[0]; 434 ds.rpbo = sc->cmdp->out_data[1]; 435 436 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) { 437 int i; 438 for (i = 0; i < 10; ++i) 439 ((u_int8_t *) &ds.losw)[i] = 440 sc->cmdp->out_data[i]; 441 } else 442 error = EIO; 443 444 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0]; 445 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2]; 446 447 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats)); 448 bcopy(&ds, (char *)ifr->ifr_data + sizeof(struct sbni16_stats), 449 sizeof(struct dsl_stats)); 450 break; 451 452 case SIOCCLRSTATS : 453 if (!(error = suser_cred(cr, NULL_CRED_OKAY))) { 454 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 455 t = 2; 456 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1)) 457 error = EIO; 458 } 459 break; 460 case SIOCSIFFLAGS: 461 if (ifp->if_flags & IFF_UP) { 462 if (!(ifp->if_flags & IFF_RUNNING)) { 463 if (sc->state == NOT_LOADED) { 464 if_printf(ifp, "firmware wasn't loaded\n"); 465 error = EBUSY; 466 } else 467 sbsh_init(sc); 468 } 469 } else { 470 if (ifp->if_flags & IFF_RUNNING) { 471 sbsh_stop(sc); 472 ifp->if_flags &= ~IFF_RUNNING; 473 } 474 } 475 break; 476 477 case SIOCADDMULTI: 478 case SIOCDELMULTI: 479 error = 0; 480 break; 481 default: 482 error = ether_ioctl(ifp, cmd, data); 483 break; 484 } 485 return (error); 486 } 487 488 489 static void 490 sbsh_shutdown(device_t dev) 491 { 492 struct sbsh_softc *sc = device_get_softc(dev); 493 494 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); 495 sbsh_stop(sc); 496 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); 497 } 498 499 static int 500 sbsh_suspend(device_t dev) 501 { 502 struct sbsh_softc *sc = device_get_softc(dev); 503 504 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); 505 sbsh_stop(sc); 506 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); 507 508 return (0); 509 } 510 511 static int 512 sbsh_resume(device_t dev) 513 { 514 struct sbsh_softc *sc = device_get_softc(dev); 515 struct ifnet *ifp = &sc->arpcom.ac_if; 516 517 if (ifp->if_flags & IFF_UP) 518 sbsh_init(sc); 519 520 return (0); 521 } 522 523 524 static void 525 sbsh_watchdog(struct ifnet *ifp) 526 { 527 struct sbsh_softc *sc = ifp->if_softc; 528 529 if_printf(ifp, "transmit timeout\n"); 530 531 if (sc->regs->SR & TXS) { 532 sc->regs->SR = TXS; 533 if_printf(ifp, "interrupt posted but not delivered\n"); 534 } 535 free_sent_buffers(sc); 536 } 537 538 /* -------------------------------------------------------------------------- */ 539 540 static void 541 sbsh_intr(void *arg) 542 { 543 struct sbsh_softc *sc = (struct sbsh_softc *)arg; 544 u_int8_t status = sc->regs->SR; 545 546 if (status == 0) 547 return; 548 549 if (status & EXT) { 550 cx28975_interrupt(sc); 551 sc->regs->SR = EXT; 552 } 553 554 if (status & UFL) { 555 resume_tx(sc); 556 sc->regs->SR = UFL; 557 ++sc->in_stats.ufl_errs; 558 ++sc->arpcom.ac_if.if_oerrors; 559 } 560 561 if (status & RXS) { 562 sc->regs->SR = RXS; 563 indicate_frames(sc); 564 alloc_rx_buffers(sc); 565 } 566 567 if (status & TXS) { 568 sc->regs->SR = TXS; 569 free_sent_buffers(sc); 570 } 571 572 if (status & CRC) { 573 ++sc->in_stats.crc_errs; 574 ++sc->arpcom.ac_if.if_ierrors; 575 sc->regs->SR = CRC; 576 } 577 578 if (status & OFL) { 579 ++sc->in_stats.ofl_errs; 580 ++sc->arpcom.ac_if.if_ierrors; 581 sc->regs->SR = OFL; 582 } 583 } 584 585 /* 586 * Look for a first descriptor of a next packet, and write it's number 587 * into CTDR. Then enable the transmitter. 588 */ 589 static void 590 resume_tx(struct sbsh_softc *sc) 591 { 592 u_int32_t cur_tbd = sc->regs->CTDR; 593 594 while (cur_tbd != sc->regs->LTDR 595 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0) 596 ; 597 sc->regs->CTDR = cur_tbd; 598 sc->regs->CR |= TXEN; 599 } 600 601 static void 602 start_xmit_frames(struct sbsh_softc *sc) 603 { 604 struct ifnet *ifp = &sc->arpcom.ac_if; 605 struct mbuf *m; 606 607 /* 608 * Check if we have any free descriptor(s) and free space in 609 * our transmit queue. 610 */ 611 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1)) 612 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) { 613 614 m = ifq_dequeue(&ifp->if_snd, NULL); 615 if (m == NULL) 616 break; 617 if (m->m_pkthdr.len) { 618 BPF_MTAP(ifp, m); 619 encap_frame(sc, m); 620 } else 621 m_freem(m); 622 } 623 624 if (sc->regs->CTDR != sc->regs->LTDR) 625 ifp->if_flags |= IFF_OACTIVE; 626 else 627 ifp->if_flags &= ~IFF_OACTIVE; 628 } 629 630 631 static void 632 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head) 633 { 634 struct mbuf *m; 635 u_int32_t cur_tbd; 636 int done; 637 638 look_for_nonzero: 639 for (m = m_head; !m->m_len; m = m->m_next) 640 ; 641 642 cur_tbd = sc->regs->LTDR & 0x7f; 643 done = 0; 644 do { 645 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) { 646 if ((m_head = repack(sc, m_head)) != NULL) 647 goto look_for_nonzero; 648 else 649 return; 650 } 651 652 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t)); 653 sc->tbd[cur_tbd].length = m->m_len; 654 655 do { 656 m = m->m_next; 657 } while (m && !m->m_len); 658 659 if (!m) { /* last fragment has been reached */ 660 sc->tbd[cur_tbd].length |= LAST_FRAG; 661 done = 1; 662 } 663 664 ++cur_tbd; 665 cur_tbd &= 0x7f; 666 } while (!done); 667 668 sc->xq[sc->tail_xq++] = m_head; 669 sc->tail_xq &= (XQLEN - 1); 670 671 sc->regs->LTDR = cur_tbd; 672 ++sc->in_stats.sent_pkts; 673 ++sc->arpcom.ac_if.if_opackets; 674 } 675 676 static struct mbuf * 677 repack(struct sbsh_softc *sc, struct mbuf *m) 678 { 679 struct mbuf *m_new; 680 681 MGETHDR(m_new, MB_DONTWAIT, MT_DATA); 682 if (!m_new) { 683 if_printf (&sc->arpcom.ac_if, 684 "unable to get mbuf.\n"); 685 return (NULL); 686 } 687 688 if (m->m_pkthdr.len > MHLEN) { 689 MCLGET(m_new, MB_DONTWAIT); 690 if (!(m_new->m_flags & M_EXT)) { 691 m_freem(m_new); 692 if_printf (&sc->arpcom.ac_if, 693 "unable to get mbuf cluster.\n"); 694 return (NULL); 695 } 696 } 697 698 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t)); 699 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len; 700 m_freem(m); 701 return (m_new); 702 } 703 704 static void 705 free_sent_buffers(struct sbsh_softc *sc) 706 { 707 u_int32_t cur_tbd; 708 709 cur_tbd = sc->regs->CTDR; 710 711 while (sc->head_tdesc != cur_tbd) { 712 /* 713 * Be careful! one element in xq may correspond to 714 * multiple descriptors. 715 */ 716 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) { 717 m_freem(sc->xq[sc->head_xq++]); 718 sc->head_xq &= (XQLEN - 1); 719 } 720 721 sc->tbd[sc->head_tdesc].length = 0; 722 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f; 723 } 724 725 start_xmit_frames(sc); 726 } 727 728 /* 729 * DON'T use free_sent_buffers to drop the queue! 730 */ 731 static void 732 alloc_rx_buffers(struct sbsh_softc *sc) 733 { 734 unsigned cur_rbd = sc->regs->LRDR & 0x7f; 735 struct mbuf *m; 736 737 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) { 738 MGETHDR(m, MB_DONTWAIT, MT_DATA); 739 if (!m) { 740 if_printf (&sc->arpcom.ac_if, 741 "unable to get mbuf.\n"); 742 return; 743 } 744 745 if (SBNI16_MAX_FRAME > MHLEN) { 746 MCLGET(m, MB_DONTWAIT); 747 if (!(m->m_flags & M_EXT)) { 748 m_freem(m); 749 if_printf (&sc->arpcom.ac_if, 750 "unable to get mbuf cluster.\n"); 751 return; 752 } 753 m->m_pkthdr.len = m->m_len = MCLBYTES; 754 } 755 756 m_adj(m, 2); /* align ip on longword boundaries */ 757 758 sc->rq[sc->tail_rq++] = m; 759 sc->tail_rq &= (RQLEN - 1); 760 761 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t)); 762 sc->rbd[cur_rbd].length = 0; 763 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f; 764 } 765 } 766 767 static void 768 indicate_frames(struct sbsh_softc *sc) 769 { 770 struct ifnet *ifp = &sc->arpcom.ac_if; 771 unsigned cur_rbd = sc->regs->CRDR & 0x7f; 772 773 while (sc->head_rdesc != cur_rbd) { 774 struct mbuf *m = sc->rq[sc->head_rq++]; 775 sc->head_rq &= (RQLEN - 1); 776 777 m->m_pkthdr.len = m->m_len = 778 sc->rbd[sc->head_rdesc].length & 0x7ff; 779 m->m_pkthdr.rcvif = ifp; 780 781 ifp->if_input(ifp, m); 782 ++sc->in_stats.rcvd_pkts; 783 ++ifp->if_ipackets; 784 785 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f; 786 } 787 } 788 789 static void 790 drop_queues(struct sbsh_softc *sc) 791 { 792 while (sc->head_rq != sc->tail_rq) { 793 m_freem(sc->rq[sc->head_rq++]); 794 sc->head_rq &= (RQLEN - 1); 795 } 796 797 while (sc->head_xq != sc->tail_xq) { 798 m_freem(sc->xq[sc->head_xq++]); 799 sc->head_xq &= (XQLEN - 1); 800 } 801 } 802 803 /* -------------------------------------------------------------------------- */ 804 805 static void 806 activate(struct sbsh_softc *sc) 807 { 808 struct timeval tv; 809 810 sc->regs->SR = 0xff; /* clear it! */ 811 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0; 812 813 sc->head_tdesc = sc->head_rdesc = 0; 814 alloc_rx_buffers(sc); 815 816 sc->regs->CRB &= ~RXDE; 817 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL; 818 sc->regs->CR |= TXEN | RXEN; 819 820 sc->state = ACTIVE; 821 ++sc->in_stats.attempts; 822 microtime(&tv); 823 sc->in_stats.last_time = tv.tv_sec; 824 start_xmit_frames(sc); 825 } 826 827 static void 828 deactivate(struct sbsh_softc *sc) 829 { 830 sc->regs->CR &= ~(RXEN | TXEN); 831 sc->regs->CRB |= RXDE; 832 sc->regs->IMR = EXT; 833 sc->regs->CTDR = sc->regs->LTDR; 834 sc->regs->CRDR = sc->regs->LRDR; 835 sc->state = ACTIVATION; 836 837 drop_queues(sc); 838 } 839 840 /* -------------------------------------------------------------------------- */ 841 842 static void 843 cx28975_interrupt(struct sbsh_softc *sc) 844 { 845 volatile struct cx28975_cmdarea *p = sc->cmdp; 846 u_int8_t t; 847 848 if (p->intr_host != 0xfe) 849 return; 850 851 if (p->out_ack & 0x80) { 852 if (*((volatile u_int8_t *)p + 0x3c7) & 2) { 853 if (sc->state != ACTIVE 854 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) { 855 activate(sc); 856 if_printf(&sc->arpcom.ac_if, "connected to peer\n"); 857 } else if (sc->state == ACTIVE 858 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) { 859 deactivate(sc); 860 if_printf(&sc->arpcom.ac_if, "carrier lost\n"); 861 } 862 } 863 864 p->intr_host = 0; 865 t = p->intr_host; 866 p->out_ack = 0; 867 } else { 868 wakeup(sc); 869 870 p->intr_host = 0; 871 t = p->intr_host; 872 } 873 } 874 875 /* -------------------------------------------------------------------------- */ 876 877 static int 878 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg) 879 { 880 static char thresh[] = { +8, -4, -16, -40 }; 881 882 volatile struct cx28975_cmdarea *p = sc->cmdp; 883 u_int8_t t, parm[12]; 884 885 p->intr_host = 0; 886 t = p->intr_host; 887 888 /* reset chip set */ 889 sc->regs->IMR = EXT; 890 sc->regs->CR = 0; 891 sc->regs->SR = 0xff; 892 DELAY(2); 893 sc->regs->CR = XRST; 894 if (cfg.crc16) 895 sc->regs->CR |= CMOD; 896 if (cfg.fill_7e) 897 sc->regs->CR |= FMOD; 898 if (cfg.inv) 899 sc->regs->CR |= PMOD; 900 901 sc->regs->CRB |= RODD | RXDE; 902 if (cfg.rburst) 903 sc->regs->CRB |= RDBE; 904 if (cfg.wburst) 905 sc->regs->CRB |= WTBE; 906 907 tsleep(sc, 0, "sbsh", 0); 908 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP) 909 return (-1); 910 911 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len)) 912 return (-1); 913 914 tsleep(sc, 0, "sbsh", 0); 915 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP) 916 return (-1); 917 918 t = cfg.master ? 1 : 9; 919 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1)) 920 return (-1); 921 922 t = 0x63; 923 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1)) 924 return (-1); 925 926 *(u_int16_t *)parm = cfg.lrate >> 3; 927 parm[2] = parm[3] = parm[0]; 928 parm[5] = cfg.lrate & 7; 929 parm[4] = parm[7] = 1; 930 parm[6] = 0; 931 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8)) 932 return (-1); 933 934 parm[0] = 0x02 | (cfg.mod << 4); 935 parm[1] = 0; 936 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2)) 937 return (-1); 938 939 bzero(parm, 12); 940 parm[0] = 0x04; /* pre-activation: G.hs */ 941 parm[4] = 0x04; /* no remote configuration */ 942 parm[7] = 0x01; /* annex A (default) */ 943 parm[8] = 0xff; /* i-bit mask (all bits) */ 944 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12)) 945 return (-1); 946 947 parm[0] = 0x03; /* dying gasp time - 3 frames */ 948 parm[1] = thresh[cfg.mod]; 949 parm[2] = 0xff; /* attenuation */ 950 parm[3] = 0x04; /* line probe NMR (+2 dB) */ 951 parm[4] = 0x00; /* reserved */ 952 parm[5] = 0x00; 953 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6)) 954 return (-1); 955 956 t = cfg.master ? 0x23 : 0x21; 957 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1)) 958 return (-1); 959 960 t = 0x02; 961 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1)) 962 return (-1); 963 964 sc->state = DOWN; 965 return (0); 966 } 967 968 static int 969 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len) 970 { 971 u_int32_t t; 972 int i; 973 u_int8_t cksum = 0; 974 975 for (i = 0; i < img_len; ++i) 976 cksum += img[i]; 977 978 t = img_len; 979 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4)) 980 return (-1); 981 982 for (i = 0; img_len >= 75; i += 75, img_len -= 75) { 983 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75)) 984 return (-1); 985 } 986 987 if (img_len 988 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len)) 989 return (-1); 990 991 t = (cksum ^ 0xff) + 1; 992 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1)) 993 return (-1); 994 995 return (0); 996 } 997 998 static int 999 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd, 1000 u_int8_t *data, u_int8_t size) 1001 { 1002 volatile struct cx28975_cmdarea *p = sc->cmdp; 1003 u_int8_t *databuf = p->in_data; 1004 int i; 1005 1006 u_int8_t cksum = 0; 1007 1008 p->in_dest = 0xf0; 1009 p->in_opcode = cmd; 1010 p->in_zero = 0; 1011 p->in_length = --size; 1012 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa; 1013 1014 for (i = 0; i <= size; ++i) { 1015 cksum ^= *data; 1016 *databuf++ = *data++; /* only 1 byte per cycle! */ 1017 } 1018 1019 p->in_datasum = cksum ^ 0xaa; 1020 p->out_ack = _ACK_NOT_COMPLETE; 1021 p->intr_8051 = 0xfe; 1022 1023 if (tsleep(sc, 0, "sbsh", hz << 3)) 1024 return (-1); 1025 1026 while (p->out_ack == _ACK_NOT_COMPLETE) 1027 ; /* FIXME ! */ 1028 1029 if ((p->out_ack & 0x1f) == _ACK_PASS) { 1030 p->out_ack = 0; 1031 return (0); 1032 } else { 1033 p->out_ack = 0; 1034 return (-1); 1035 } 1036 } 1037