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 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/sockio.h> 32 #include <sys/mbuf.h> 33 #include <sys/malloc.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/priv.h> 37 #include <sys/socket.h> 38 #include <sys/random.h> 39 #include <sys/serialize.h> 40 #include <sys/bus.h> 41 #include <sys/rman.h> 42 #include <sys/interrupt.h> 43 44 #include <net/if.h> 45 #include <net/ifq_var.h> 46 #include <net/if_arp.h> 47 #include <net/ethernet.h> 48 #include <net/if_media.h> 49 50 #include <net/bpf.h> 51 52 #include <vm/vm.h> 53 #include <vm/pmap.h> 54 55 #include <bus/pci/pcireg.h> 56 #include <bus/pci/pcivar.h> 57 58 #include "if_sbshreg.h" 59 60 /* -------------------------------------------------------------------------- */ 61 62 struct sbni16_hw_regs { 63 u_int8_t CR, CRB, SR, IMR, CTDR, LTDR, CRDR, LRDR; 64 }; 65 66 struct hw_descr { 67 u_int32_t address; 68 u_int32_t length; 69 }; 70 71 struct cx28975_cmdarea { 72 u_int8_t intr_host; 73 u_int8_t intr_8051; 74 u_int8_t map_version; 75 76 u_int8_t in_dest; 77 u_int8_t in_opcode; 78 u_int8_t in_zero; 79 u_int8_t in_length; 80 u_int8_t in_csum; 81 u_int8_t in_data[75]; 82 u_int8_t in_datasum; 83 84 u_int8_t out_dest; 85 u_int8_t out_opcode; 86 u_int8_t out_ack; 87 u_int8_t out_length; 88 u_int8_t out_csum; 89 u_int8_t out_data[75]; 90 u_int8_t out_datasum; 91 }; 92 93 #define XQLEN 8 94 #define RQLEN 8 95 96 struct sbsh_softc { 97 struct arpcom arpcom; /* ethernet common */ 98 99 struct resource *mem_res; 100 struct resource *irq_res; 101 void *intr_hand; 102 103 void *mem_base; /* mapped memory address */ 104 105 volatile struct sbni16_hw_regs *regs; 106 volatile struct hw_descr *tbd; 107 volatile struct hw_descr *rbd; 108 volatile struct cx28975_cmdarea *cmdp; 109 110 /* SBNI16 controller statistics */ 111 struct sbni16_stats { 112 u_int32_t sent_pkts, rcvd_pkts; 113 u_int32_t crc_errs, ufl_errs, ofl_errs, attempts, last_time; 114 } in_stats; 115 116 /* transmit and reception queues */ 117 struct mbuf *xq[XQLEN], *rq[RQLEN]; 118 unsigned head_xq, tail_xq, head_rq, tail_rq; 119 120 /* the descriptors mapped onto the first buffers in xq and rq */ 121 unsigned head_tdesc, head_rdesc; 122 u_int8_t state; 123 }; 124 125 struct cx28975_cfg { 126 u_int8_t *firmw_image; 127 u_int32_t firmw_len; 128 u_int32_t lrate: 10; 129 u_int32_t master: 1; 130 u_int32_t mod: 2; 131 u_int32_t crc16: 1; 132 u_int32_t fill_7e: 1; 133 u_int32_t inv: 1; 134 u_int32_t rburst: 1; 135 u_int32_t wburst: 1; 136 u_int32_t : 14; 137 }; 138 139 /* SHDSL transceiver statistics */ 140 struct dsl_stats { 141 u_int8_t status_1, status_3; 142 u_int8_t attenuat, nmr, tpbo, rpbo; 143 u_int16_t losw, segd, crc, sega, losd; 144 }; 145 146 enum State { NOT_LOADED, DOWN, ACTIVATION, ACTIVE }; 147 148 #define SIOCLOADFIRMW _IOWR('i', 67, struct ifreq) 149 #define SIOCGETSTATS _IOWR('i', 68, struct ifreq) 150 #define SIOCCLRSTATS _IOWR('i', 69, struct ifreq) 151 152 static int sbsh_probe(device_t); 153 static int sbsh_attach(device_t); 154 static int sbsh_detach(device_t); 155 static int sbsh_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *); 156 static void sbsh_shutdown(device_t); 157 static int sbsh_suspend(device_t); 158 static int sbsh_resume(device_t); 159 static void sbsh_watchdog(struct ifnet *); 160 161 static void sbsh_start(struct ifnet *, struct ifaltq_subque *); 162 static void sbsh_init(void *); 163 static void sbsh_stop(struct sbsh_softc *); 164 static void init_card(struct sbsh_softc *); 165 static void sbsh_intr(void *); 166 static void resume_tx(struct sbsh_softc *); 167 static void start_xmit_frames(struct sbsh_softc *); 168 static void encap_frame(struct sbsh_softc *, struct mbuf *); 169 static struct mbuf * repack(struct sbsh_softc *, struct mbuf *); 170 static void free_sent_buffers(struct sbsh_softc *); 171 static void alloc_rx_buffers(struct sbsh_softc *); 172 static void indicate_frames(struct sbsh_softc *); 173 static void drop_queues(struct sbsh_softc *); 174 static void activate(struct sbsh_softc *); 175 static void deactivate(struct sbsh_softc *); 176 static void cx28975_interrupt(struct sbsh_softc *); 177 static int start_cx28975(struct sbsh_softc *, struct cx28975_cfg); 178 static int download_firmware(struct sbsh_softc *, u_int8_t *, u_int32_t); 179 static int issue_cx28975_cmd(struct sbsh_softc *, u_int8_t, 180 u_int8_t *, u_int8_t); 181 182 static device_method_t sbsh_methods[] = { 183 /* Device interface */ 184 DEVMETHOD(device_probe, sbsh_probe), 185 DEVMETHOD(device_attach, sbsh_attach), 186 DEVMETHOD(device_detach, sbsh_detach), 187 DEVMETHOD(device_shutdown, sbsh_shutdown), 188 DEVMETHOD(device_suspend, sbsh_suspend), 189 DEVMETHOD(device_resume, sbsh_resume), 190 191 DEVMETHOD_END 192 }; 193 194 static driver_t sbsh_driver = { 195 "sbsh", 196 sbsh_methods, 197 sizeof(struct sbsh_softc) 198 }; 199 200 static devclass_t sbsh_devclass; 201 202 DECLARE_DUMMY_MODULE(if_sbsh); 203 DRIVER_MODULE(if_sbsh, pci, sbsh_driver, sbsh_devclass, NULL, NULL); 204 205 static int 206 sbsh_probe(device_t dev) 207 { 208 if (pci_get_vendor(dev) != SBNI16_VENDOR 209 || pci_get_device(dev) != SBNI16_DEVICE 210 || pci_get_subdevice(dev) != SBNI16_SUBDEV) 211 return (ENXIO); 212 213 device_set_desc(dev, "Granch SBNI16 G.SHDSL Modem"); 214 return (0); 215 } 216 217 static int 218 sbsh_attach(device_t dev) 219 { 220 struct sbsh_softc *sc; 221 struct ifnet *ifp; 222 int unit, error = 0, rid; 223 224 sc = device_get_softc(dev); 225 unit = device_get_unit(dev); 226 227 rid = PCIR_MAPS + 4; 228 sc->mem_res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 229 0, ~0, 4096, RF_ACTIVE); 230 231 if (sc->mem_res == NULL) { 232 kprintf ("sbsh%d: couldn't map memory\n", unit); 233 error = ENXIO; 234 goto fail; 235 } 236 237 rid = 0; 238 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 239 RF_SHAREABLE | RF_ACTIVE); 240 241 if (sc->irq_res == NULL) { 242 kprintf("sbsh%d: couldn't map interrupt\n", unit); 243 error = ENXIO; 244 goto fail; 245 } 246 247 sc->mem_base = rman_get_virtual(sc->mem_res); 248 init_card(sc); 249 /* generate ethernet MAC address */ 250 *(u_int32_t *)sc->arpcom.ac_enaddr = htonl(0x00ff0192); 251 read_random_unlimited(sc->arpcom.ac_enaddr + 4, 2); 252 253 ifp = &sc->arpcom.ac_if; 254 ifp->if_softc = sc; 255 if_initname(ifp, "sbsh", unit); 256 ifp->if_mtu = ETHERMTU; 257 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 258 ifp->if_ioctl = sbsh_ioctl; 259 ifp->if_start = sbsh_start; 260 ifp->if_watchdog = sbsh_watchdog; 261 ifp->if_init = sbsh_init; 262 ifp->if_baudrate = 4600000; 263 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 264 ifq_set_ready(&ifp->if_snd); 265 266 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL); 267 268 ifq_set_cpuid(&ifp->if_snd, rman_get_cpuid(sc->irq_res)); 269 270 error = bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE, 271 sbsh_intr, sc, &sc->intr_hand, 272 ifp->if_serializer); 273 if (error) { 274 ether_ifdetach(ifp); 275 kprintf("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, struct ifaltq_subque *ifsq) 314 { 315 struct sbsh_softc *sc = ifp->if_softc; 316 317 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); 318 319 if (sc->state == ACTIVE) 320 start_xmit_frames(ifp->if_softc); 321 } 322 323 324 static void 325 sbsh_init(void *xsc) 326 { 327 struct sbsh_softc *sc = xsc; 328 struct ifnet *ifp = &sc->arpcom.ac_if; 329 u_int8_t t; 330 331 if ((ifp->if_flags & IFF_RUNNING) || sc->state == NOT_LOADED) { 332 return; 333 } 334 335 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 336 sc->head_xq = sc->tail_xq = sc->head_rq = sc->tail_rq = 0; 337 sc->head_tdesc = sc->head_rdesc = 0; 338 339 sc->regs->IMR = EXT; 340 t = 2; 341 issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1); 342 if (issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1) == 0) { 343 sc->state = ACTIVATION; 344 345 ifp->if_flags |= IFF_RUNNING; 346 ifq_clr_oactive(&ifp->if_snd); 347 } 348 } 349 350 351 static void 352 sbsh_stop(struct sbsh_softc *sc) 353 { 354 u_int8_t t; 355 356 sc->regs->IMR = EXT; 357 358 t = 0; 359 issue_cx28975_cmd(sc, _DSL_ACTIVATION, &t, 1); 360 if (sc->state == ACTIVE) { 361 t = 1; 362 issue_cx28975_cmd(sc, _DSL_FORCE_DEACTIVATE, &t, 1); 363 /* FIX! activation manager state */ 364 365 /* Is it really must be done here? It calls from intr handler */ 366 deactivate(sc); 367 } 368 369 sc->regs->IMR = 0; 370 sc->state = DOWN; 371 } 372 373 374 static void 375 init_card(struct sbsh_softc *sc) 376 { 377 sc->state = NOT_LOADED; 378 sc->tbd = (struct hw_descr *) sc->mem_base; 379 sc->rbd = (struct hw_descr *) ((u_int8_t *)sc->mem_base + 0x400); 380 sc->regs = (struct sbni16_hw_regs *) ((u_int8_t *)sc->mem_base + 0x800); 381 sc->cmdp = (struct cx28975_cmdarea *) ((u_int8_t *)sc->mem_base + 0xc00); 382 383 sc->regs->CR = 0; 384 sc->regs->SR = 0xff; 385 sc->regs->IMR = 0; 386 } 387 388 389 static int 390 sbsh_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 391 { 392 struct sbsh_softc *sc = ifp->if_softc; 393 struct ifreq *ifr = (struct ifreq *) data; 394 struct cx28975_cfg cfg; 395 struct dsl_stats ds; 396 int error = 0; 397 u_int8_t t; 398 399 switch(cmd) { 400 case SIOCLOADFIRMW: 401 if ((error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY)) != 0) 402 break; 403 if (ifp->if_flags & IFF_UP) 404 error = EBUSY; 405 406 bcopy((caddr_t)ifr->ifr_data, (caddr_t)&cfg, sizeof cfg); 407 if (start_cx28975(sc, cfg) == 0) { 408 static char *modstr[] = { 409 "TCPAM32", "TCPAM16", "TCPAM8", "TCPAM4" }; 410 if_printf(&sc->arpcom.ac_if, "%s, rate %d, %s\n", 411 cfg.master ? "master" : "slave", 412 cfg.lrate << 3, modstr[cfg.mod]); 413 } else { 414 if_printf(&sc->arpcom.ac_if, 415 "unable to load firmware\n"); 416 error = EIO; 417 } 418 break; 419 420 case SIOCGETSTATS : 421 if ((error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY)) != 0) 422 break; 423 424 t = 0; 425 if (issue_cx28975_cmd(sc, _DSL_FAR_END_ATTEN, &t, 1)) 426 error = EIO; 427 ds.attenuat = sc->cmdp->out_data[0]; 428 429 if (issue_cx28975_cmd(sc, _DSL_NOISE_MARGIN, &t, 1)) 430 error = EIO; 431 ds.nmr = sc->cmdp->out_data[0]; 432 433 if (issue_cx28975_cmd(sc, _DSL_POWER_BACK_OFF_RESULT, &t, 1)) 434 error = EIO; 435 ds.tpbo = sc->cmdp->out_data[0]; 436 ds.rpbo = sc->cmdp->out_data[1]; 437 438 if (!issue_cx28975_cmd(sc, _DSL_HDSL_PERF_ERR_CTRS, &t, 1)) { 439 int i; 440 for (i = 0; i < 10; ++i) 441 ((u_int8_t *) &ds.losw)[i] = 442 sc->cmdp->out_data[i]; 443 } else 444 error = EIO; 445 446 ds.status_1 = ((volatile u_int8_t *)sc->cmdp)[0x3c0]; 447 ds.status_3 = ((volatile u_int8_t *)sc->cmdp)[0x3c2]; 448 449 bcopy(&sc->in_stats, ifr->ifr_data, sizeof(struct sbni16_stats)); 450 bcopy(&ds, (char *)ifr->ifr_data + sizeof(struct sbni16_stats), 451 sizeof(struct dsl_stats)); 452 break; 453 454 case SIOCCLRSTATS : 455 if (!(error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY))) { 456 bzero(&sc->in_stats, sizeof(struct sbni16_stats)); 457 t = 2; 458 if (issue_cx28975_cmd(sc, _DSL_CLEAR_ERROR_CTRS, &t, 1)) 459 error = EIO; 460 } 461 break; 462 case SIOCSIFFLAGS: 463 if (ifp->if_flags & IFF_UP) { 464 if (!(ifp->if_flags & IFF_RUNNING)) { 465 if (sc->state == NOT_LOADED) { 466 if_printf(ifp, "firmware wasn't loaded\n"); 467 error = EBUSY; 468 } else 469 sbsh_init(sc); 470 } 471 } else { 472 if (ifp->if_flags & IFF_RUNNING) { 473 sbsh_stop(sc); 474 ifp->if_flags &= ~IFF_RUNNING; 475 } 476 } 477 break; 478 479 case SIOCADDMULTI: 480 case SIOCDELMULTI: 481 error = 0; 482 break; 483 default: 484 error = ether_ioctl(ifp, cmd, data); 485 break; 486 } 487 return (error); 488 } 489 490 491 static void 492 sbsh_shutdown(device_t dev) 493 { 494 struct sbsh_softc *sc = device_get_softc(dev); 495 496 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); 497 sbsh_stop(sc); 498 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); 499 } 500 501 static int 502 sbsh_suspend(device_t dev) 503 { 504 struct sbsh_softc *sc = device_get_softc(dev); 505 506 lwkt_serialize_enter(sc->arpcom.ac_if.if_serializer); 507 sbsh_stop(sc); 508 lwkt_serialize_exit(sc->arpcom.ac_if.if_serializer); 509 510 return (0); 511 } 512 513 static int 514 sbsh_resume(device_t dev) 515 { 516 struct sbsh_softc *sc = device_get_softc(dev); 517 struct ifnet *ifp = &sc->arpcom.ac_if; 518 519 if (ifp->if_flags & IFF_UP) 520 sbsh_init(sc); 521 522 return (0); 523 } 524 525 526 static void 527 sbsh_watchdog(struct ifnet *ifp) 528 { 529 struct sbsh_softc *sc = ifp->if_softc; 530 531 if_printf(ifp, "transmit timeout\n"); 532 533 if (sc->regs->SR & TXS) { 534 sc->regs->SR = TXS; 535 if_printf(ifp, "interrupt posted but not delivered\n"); 536 } 537 free_sent_buffers(sc); 538 } 539 540 /* -------------------------------------------------------------------------- */ 541 542 static void 543 sbsh_intr(void *arg) 544 { 545 struct sbsh_softc *sc = (struct sbsh_softc *)arg; 546 u_int8_t status = sc->regs->SR; 547 548 if (status == 0) 549 return; 550 551 if (status & EXT) { 552 cx28975_interrupt(sc); 553 sc->regs->SR = EXT; 554 } 555 556 if (status & UFL) { 557 resume_tx(sc); 558 sc->regs->SR = UFL; 559 ++sc->in_stats.ufl_errs; 560 IFNET_STAT_INC(&sc->arpcom.ac_if, oerrors, 1); 561 } 562 563 if (status & RXS) { 564 sc->regs->SR = RXS; 565 indicate_frames(sc); 566 alloc_rx_buffers(sc); 567 } 568 569 if (status & TXS) { 570 sc->regs->SR = TXS; 571 free_sent_buffers(sc); 572 } 573 574 if (status & CRC) { 575 ++sc->in_stats.crc_errs; 576 IFNET_STAT_INC(&sc->arpcom.ac_if, ierrors, 1); 577 sc->regs->SR = CRC; 578 } 579 580 if (status & OFL) { 581 ++sc->in_stats.ofl_errs; 582 IFNET_STAT_INC(&sc->arpcom.ac_if, ierrors, 1); 583 sc->regs->SR = OFL; 584 } 585 } 586 587 /* 588 * Look for a first descriptor of a next packet, and write it's number 589 * into CTDR. Then enable the transmitter. 590 */ 591 static void 592 resume_tx(struct sbsh_softc *sc) 593 { 594 u_int32_t cur_tbd = sc->regs->CTDR; 595 596 while (cur_tbd != sc->regs->LTDR 597 && (sc->tbd[cur_tbd++].length & LAST_FRAG) == 0) 598 ; 599 sc->regs->CTDR = cur_tbd; 600 sc->regs->CR |= TXEN; 601 } 602 603 static void 604 start_xmit_frames(struct sbsh_softc *sc) 605 { 606 struct ifnet *ifp = &sc->arpcom.ac_if; 607 struct mbuf *m; 608 609 /* 610 * Check if we have any free descriptor(s) and free space in 611 * our transmit queue. 612 */ 613 while (sc->tail_xq != ((sc->head_xq - 1) & (XQLEN - 1)) 614 && sc->regs->LTDR != ((sc->head_tdesc - 1) & 0x7f)) { 615 616 m = ifq_dequeue(&ifp->if_snd); 617 if (m == NULL) 618 break; 619 if (m->m_pkthdr.len) { 620 BPF_MTAP(ifp, m); 621 encap_frame(sc, m); 622 } else 623 m_freem(m); 624 } 625 626 if (sc->regs->CTDR != sc->regs->LTDR) 627 ifq_set_oactive(&ifp->if_snd); 628 else 629 ifq_clr_oactive(&ifp->if_snd); 630 } 631 632 633 static void 634 encap_frame(struct sbsh_softc *sc, struct mbuf *m_head) 635 { 636 struct mbuf *m; 637 u_int32_t cur_tbd; 638 int done; 639 640 look_for_nonzero: 641 for (m = m_head; !m->m_len; m = m->m_next) 642 ; 643 644 cur_tbd = sc->regs->LTDR & 0x7f; 645 done = 0; 646 do { 647 if (m->m_len < 5 || cur_tbd == ((sc->head_tdesc - 1) & 0x7f)) { 648 if ((m_head = repack(sc, m_head)) != NULL) 649 goto look_for_nonzero; 650 else 651 return; 652 } 653 654 sc->tbd[cur_tbd].address = vtophys(mtod(m, vm_offset_t)); 655 sc->tbd[cur_tbd].length = m->m_len; 656 657 do { 658 m = m->m_next; 659 } while (m && !m->m_len); 660 661 if (!m) { /* last fragment has been reached */ 662 sc->tbd[cur_tbd].length |= LAST_FRAG; 663 done = 1; 664 } 665 666 ++cur_tbd; 667 cur_tbd &= 0x7f; 668 } while (!done); 669 670 sc->xq[sc->tail_xq++] = m_head; 671 sc->tail_xq &= (XQLEN - 1); 672 673 sc->regs->LTDR = cur_tbd; 674 ++sc->in_stats.sent_pkts; 675 IFNET_STAT_INC(&sc->arpcom.ac_if, opackets, 1); 676 } 677 678 static struct mbuf * 679 repack(struct sbsh_softc *sc, struct mbuf *m) 680 { 681 struct mbuf *m_new; 682 683 MGETHDR(m_new, M_NOWAIT, MT_DATA); 684 if (!m_new) { 685 if_printf (&sc->arpcom.ac_if, 686 "unable to get mbuf.\n"); 687 return (NULL); 688 } 689 690 if (m->m_pkthdr.len > MHLEN) { 691 MCLGET(m_new, M_NOWAIT); 692 if (!(m_new->m_flags & M_EXT)) { 693 m_freem(m_new); 694 if_printf (&sc->arpcom.ac_if, 695 "unable to get mbuf cluster.\n"); 696 return (NULL); 697 } 698 } 699 700 m_copydata(m, 0, m->m_pkthdr.len, mtod(m_new, caddr_t)); 701 m_new->m_pkthdr.len = m_new->m_len = m->m_pkthdr.len; 702 m_freem(m); 703 return (m_new); 704 } 705 706 static void 707 free_sent_buffers(struct sbsh_softc *sc) 708 { 709 u_int32_t cur_tbd; 710 711 cur_tbd = sc->regs->CTDR; 712 713 while (sc->head_tdesc != cur_tbd) { 714 /* 715 * Be careful! one element in xq may correspond to 716 * multiple descriptors. 717 */ 718 if (sc->tbd[sc->head_tdesc].length & LAST_FRAG) { 719 m_freem(sc->xq[sc->head_xq++]); 720 sc->head_xq &= (XQLEN - 1); 721 } 722 723 sc->tbd[sc->head_tdesc].length = 0; 724 sc->head_tdesc = (sc->head_tdesc + 1) & 0x7f; 725 } 726 727 start_xmit_frames(sc); 728 } 729 730 /* 731 * DON'T use free_sent_buffers to drop the queue! 732 */ 733 static void 734 alloc_rx_buffers(struct sbsh_softc *sc) 735 { 736 unsigned cur_rbd = sc->regs->LRDR & 0x7f; 737 struct mbuf *m; 738 739 while (sc->tail_rq != ((sc->head_rq - 1) & (RQLEN - 1))) { 740 MGETHDR(m, M_NOWAIT, MT_DATA); 741 if (!m) { 742 if_printf (&sc->arpcom.ac_if, 743 "unable to get mbuf.\n"); 744 return; 745 } 746 747 if (SBNI16_MAX_FRAME > MHLEN) { 748 MCLGET(m, M_NOWAIT); 749 if (!(m->m_flags & M_EXT)) { 750 m_freem(m); 751 if_printf (&sc->arpcom.ac_if, 752 "unable to get mbuf cluster.\n"); 753 return; 754 } 755 m->m_pkthdr.len = m->m_len = MCLBYTES; 756 } 757 758 m_adj(m, 2); /* align ip on longword boundaries */ 759 760 sc->rq[sc->tail_rq++] = m; 761 sc->tail_rq &= (RQLEN - 1); 762 763 sc->rbd[cur_rbd].address = vtophys(mtod(m, vm_offset_t)); 764 sc->rbd[cur_rbd].length = 0; 765 sc->regs->LRDR = cur_rbd = (cur_rbd + 1) & 0x7f; 766 } 767 } 768 769 static void 770 indicate_frames(struct sbsh_softc *sc) 771 { 772 struct ifnet *ifp = &sc->arpcom.ac_if; 773 unsigned cur_rbd = sc->regs->CRDR & 0x7f; 774 775 while (sc->head_rdesc != cur_rbd) { 776 struct mbuf *m = sc->rq[sc->head_rq++]; 777 sc->head_rq &= (RQLEN - 1); 778 779 m->m_pkthdr.len = m->m_len = 780 sc->rbd[sc->head_rdesc].length & 0x7ff; 781 m->m_pkthdr.rcvif = ifp; 782 783 ifp->if_input(ifp, m, NULL, -1); 784 ++sc->in_stats.rcvd_pkts; 785 IFNET_STAT_INC(ifp, ipackets, 1); 786 787 sc->head_rdesc = (sc->head_rdesc + 1) & 0x7f; 788 } 789 } 790 791 static void 792 drop_queues(struct sbsh_softc *sc) 793 { 794 while (sc->head_rq != sc->tail_rq) { 795 m_freem(sc->rq[sc->head_rq++]); 796 sc->head_rq &= (RQLEN - 1); 797 } 798 799 while (sc->head_xq != sc->tail_xq) { 800 m_freem(sc->xq[sc->head_xq++]); 801 sc->head_xq &= (XQLEN - 1); 802 } 803 } 804 805 /* -------------------------------------------------------------------------- */ 806 807 static void 808 activate(struct sbsh_softc *sc) 809 { 810 struct timeval tv; 811 812 sc->regs->SR = 0xff; /* clear it! */ 813 sc->regs->CTDR = sc->regs->LTDR = sc->regs->CRDR = sc->regs->LRDR = 0; 814 815 sc->head_tdesc = sc->head_rdesc = 0; 816 alloc_rx_buffers(sc); 817 818 sc->regs->CRB &= ~RXDE; 819 sc->regs->IMR = EXT | RXS | TXS | CRC | OFL | UFL; 820 sc->regs->CR |= TXEN | RXEN; 821 822 sc->state = ACTIVE; 823 ++sc->in_stats.attempts; 824 microtime(&tv); 825 sc->in_stats.last_time = tv.tv_sec; 826 start_xmit_frames(sc); 827 } 828 829 static void 830 deactivate(struct sbsh_softc *sc) 831 { 832 sc->regs->CR &= ~(RXEN | TXEN); 833 sc->regs->CRB |= RXDE; 834 sc->regs->IMR = EXT; 835 sc->regs->CTDR = sc->regs->LTDR; 836 sc->regs->CRDR = sc->regs->LRDR; 837 sc->state = ACTIVATION; 838 839 drop_queues(sc); 840 } 841 842 /* -------------------------------------------------------------------------- */ 843 844 static void 845 cx28975_interrupt(struct sbsh_softc *sc) 846 { 847 volatile struct cx28975_cmdarea *p = sc->cmdp; 848 849 if (p->intr_host != 0xfe) 850 return; 851 852 if (p->out_ack & 0x80) { 853 if (*((volatile u_int8_t *)p + 0x3c7) & 2) { 854 if (sc->state != ACTIVE 855 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) == 0x40) { 856 activate(sc); 857 if_printf(&sc->arpcom.ac_if, "connected to peer\n"); 858 } else if (sc->state == ACTIVE 859 && (*((volatile u_int8_t *)p + 0x3c0) & 0xc0) != 0x40) { 860 deactivate(sc); 861 if_printf(&sc->arpcom.ac_if, "carrier lost\n"); 862 } 863 } 864 865 p->intr_host = 0; 866 p->out_ack = 0; 867 } else { 868 wakeup(sc); 869 870 p->intr_host = 0; 871 } 872 } 873 874 /* -------------------------------------------------------------------------- */ 875 876 static int 877 start_cx28975(struct sbsh_softc *sc, struct cx28975_cfg cfg) 878 { 879 static char thresh[] = { +8, -4, -16, -40 }; 880 881 volatile struct cx28975_cmdarea *p = sc->cmdp; 882 u_int8_t t, parm[12]; 883 884 p->intr_host = 0; 885 t = p->intr_host; 886 887 /* reset chip set */ 888 sc->regs->IMR = EXT; 889 sc->regs->CR = 0; 890 sc->regs->SR = 0xff; 891 DELAY(2); 892 sc->regs->CR = XRST; 893 if (cfg.crc16) 894 sc->regs->CR |= CMOD; 895 if (cfg.fill_7e) 896 sc->regs->CR |= FMOD; 897 if (cfg.inv) 898 sc->regs->CR |= PMOD; 899 900 sc->regs->CRB |= RODD | RXDE; 901 if (cfg.rburst) 902 sc->regs->CRB |= RDBE; 903 if (cfg.wburst) 904 sc->regs->CRB |= WTBE; 905 906 tsleep(sc, 0, "sbsh", 0); 907 if ((p->out_ack & 0x1f) != _ACK_BOOT_WAKE_UP) 908 return (-1); 909 910 if (download_firmware(sc, cfg.firmw_image, cfg.firmw_len)) 911 return (-1); 912 913 tsleep(sc, 0, "sbsh", 0); 914 if ((p->out_ack & 0x1f) != _ACK_OPER_WAKE_UP) 915 return (-1); 916 917 t = cfg.master ? 1 : 9; 918 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_ENABLE, &t, 1)) 919 return (-1); 920 921 t = 0x63; 922 if (issue_cx28975_cmd(sc, _DSL_SYSTEM_CONFIG, &t, 1)) 923 return (-1); 924 925 *(u_int16_t *)parm = cfg.lrate >> 3; 926 parm[2] = parm[3] = parm[0]; 927 parm[5] = cfg.lrate & 7; 928 parm[4] = parm[7] = 1; 929 parm[6] = 0; 930 if (issue_cx28975_cmd(sc, _DSL_MULTI_RATE_CONFIG, parm, 8)) 931 return (-1); 932 933 parm[0] = 0x02 | (cfg.mod << 4); 934 parm[1] = 0; 935 if (issue_cx28975_cmd(sc, _DSL_TRAINING_MODE, parm, 2)) 936 return (-1); 937 938 bzero(parm, 12); 939 parm[0] = 0x04; /* pre-activation: G.hs */ 940 parm[4] = 0x04; /* no remote configuration */ 941 parm[7] = 0x01; /* annex A (default) */ 942 parm[8] = 0xff; /* i-bit mask (all bits) */ 943 if (issue_cx28975_cmd(sc, _DSL_PREACTIVATION_CFG, parm, 12)) 944 return (-1); 945 946 parm[0] = 0x03; /* dying gasp time - 3 frames */ 947 parm[1] = thresh[cfg.mod]; 948 parm[2] = 0xff; /* attenuation */ 949 parm[3] = 0x04; /* line probe NMR (+2 dB) */ 950 parm[4] = 0x00; /* reserved */ 951 parm[5] = 0x00; 952 if (issue_cx28975_cmd(sc, _DSL_THRESHOLDS, parm, 6)) 953 return (-1); 954 955 t = cfg.master ? 0x23 : 0x21; 956 if (issue_cx28975_cmd(sc, _DSL_FR_PCM_CONFIG, &t, 1)) 957 return (-1); 958 959 t = 0x02; 960 if (issue_cx28975_cmd(sc, _DSL_INTR_HOST_MASK, &t, 1)) 961 return (-1); 962 963 sc->state = DOWN; 964 return (0); 965 } 966 967 static int 968 download_firmware(struct sbsh_softc *sc, u_int8_t *img, u_int32_t img_len) 969 { 970 u_int32_t t; 971 int i; 972 u_int8_t cksum = 0; 973 974 for (i = 0; i < img_len; ++i) 975 cksum += img[i]; 976 977 t = img_len; 978 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_START, (u_int8_t *) &t, 4)) 979 return (-1); 980 981 for (i = 0; img_len >= 75; i += 75, img_len -= 75) { 982 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, 75)) 983 return (-1); 984 } 985 986 if (img_len 987 && issue_cx28975_cmd(sc, _DSL_DOWNLOAD_DATA, img + i, img_len)) 988 return (-1); 989 990 t = (cksum ^ 0xff) + 1; 991 if (issue_cx28975_cmd(sc, _DSL_DOWNLOAD_END, (u_int8_t *) &t, 1)) 992 return (-1); 993 994 return (0); 995 } 996 997 static int 998 issue_cx28975_cmd(struct sbsh_softc *sc, u_int8_t cmd, 999 u_int8_t *data, u_int8_t size) 1000 { 1001 volatile struct cx28975_cmdarea *p = sc->cmdp; 1002 volatile u_int8_t *databuf = p->in_data; 1003 int i; 1004 1005 u_int8_t cksum = 0; 1006 1007 p->in_dest = 0xf0; 1008 p->in_opcode = cmd; 1009 p->in_zero = 0; 1010 p->in_length = --size; 1011 p->in_csum = 0xf0 ^ cmd ^ size ^ 0xaa; 1012 1013 for (i = 0; i <= size; ++i) { 1014 cksum ^= *data; 1015 *databuf++ = *data++; /* only 1 byte per cycle! */ 1016 } 1017 1018 p->in_datasum = cksum ^ 0xaa; 1019 p->out_ack = _ACK_NOT_COMPLETE; 1020 p->intr_8051 = 0xfe; 1021 1022 if (tsleep(sc, 0, "sbsh", hz << 3)) 1023 return (-1); 1024 1025 while (p->out_ack == _ACK_NOT_COMPLETE) 1026 ; /* FIXME ! */ 1027 1028 if ((p->out_ack & 0x1f) == _ACK_PASS) { 1029 p->out_ack = 0; 1030 return (0); 1031 } else { 1032 p->out_ack = 0; 1033 return (-1); 1034 } 1035 } 1036