atw.c revision 1.70
1/* $NetBSD: atw.c,v 1.70 2004/07/23 07:20:44 dyoung Exp $ */ 2 3/*- 4 * Copyright (c) 1998, 1999, 2000, 2002, 2003, 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by David Young, by Jason R. Thorpe, and by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * Device driver for the ADMtek ADM8211 802.11 MAC/BBP. 41 */ 42 43#include <sys/cdefs.h> 44__KERNEL_RCSID(0, "$NetBSD: atw.c,v 1.70 2004/07/23 07:20:44 dyoung Exp $"); 45 46#include "bpfilter.h" 47 48#include <sys/param.h> 49#include <sys/systm.h> 50#include <sys/callout.h> 51#include <sys/mbuf.h> 52#include <sys/malloc.h> 53#include <sys/kernel.h> 54#include <sys/socket.h> 55#include <sys/ioctl.h> 56#include <sys/errno.h> 57#include <sys/device.h> 58#include <sys/time.h> 59 60#include <machine/endian.h> 61 62#include <uvm/uvm_extern.h> 63 64#include <net/if.h> 65#include <net/if_dl.h> 66#include <net/if_media.h> 67#include <net/if_ether.h> 68 69#include <net80211/ieee80211_var.h> 70#include <net80211/ieee80211_compat.h> 71#include <net80211/ieee80211_radiotap.h> 72 73#if NBPFILTER > 0 74#include <net/bpf.h> 75#endif 76 77#include <machine/bus.h> 78#include <machine/intr.h> 79 80#include <dev/ic/atwreg.h> 81#include <dev/ic/rf3000reg.h> 82#include <dev/ic/si4136reg.h> 83#include <dev/ic/atwvar.h> 84#include <dev/ic/smc93cx6var.h> 85 86/* XXX TBD open questions 87 * 88 * 89 * When should I set DSSS PAD in reg 0x15 of RF3000? In 1-2Mbps 90 * modes only, or all modes (5.5-11 Mbps CCK modes, too?) Does the MAC 91 * handle this for me? 92 * 93 */ 94/* device attachment 95 * 96 * print TOFS[012] 97 * 98 * device initialization 99 * 100 * clear ATW_FRCTL_MAXPSP to disable max power saving 101 * set ATW_TXBR_ALCUPDATE to enable ALC 102 * set TOFS[012]? (hope not) 103 * disable rx/tx 104 * set ATW_PAR_SWR (software reset) 105 * wait for ATW_PAR_SWR clear 106 * disable interrupts 107 * ack status register 108 * enable interrupts 109 * 110 * rx/tx initialization 111 * 112 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 113 * allocate and init descriptor rings 114 * write ATW_PAR_DSL (descriptor skip length) 115 * write descriptor base addrs: ATW_TDBD, ATW_TDBP, write ATW_RDB 116 * write ATW_NAR_SQ for one/both transmit descriptor rings 117 * write ATW_NAR_SQ for one/both transmit descriptor rings 118 * enable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 119 * 120 * rx/tx end 121 * 122 * stop DMA 123 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 124 * flush tx w/ ATW_NAR_HF 125 * 126 * scan 127 * 128 * initialize rx/tx 129 * 130 * BSS join: (re)association response 131 * 132 * set ATW_FRCTL_AID 133 * 134 * optimizations ??? 135 * 136 */ 137 138#define ATW_REFSLAVE /* slavishly do what the reference driver does */ 139 140#define VOODOO_DUR_11_ROUNDING 0x01 /* necessary */ 141#define VOODOO_DUR_2_4_SPECIALCASE 0x02 /* NOT necessary */ 142int atw_voodoo = VOODOO_DUR_11_ROUNDING; 143 144int atw_pseudo_milli = 1; 145int atw_magic_delay1 = 100 * 1000; 146int atw_magic_delay2 = 100 * 1000; 147/* more magic multi-millisecond delays (units: microseconds) */ 148int atw_nar_delay = 20 * 1000; 149int atw_magic_delay4 = 10 * 1000; 150int atw_rf_delay1 = 10 * 1000; 151int atw_rf_delay2 = 5 * 1000; 152int atw_plcphd_delay = 2 * 1000; 153int atw_bbp_io_enable_delay = 20 * 1000; 154int atw_bbp_io_disable_delay = 2 * 1000; 155int atw_writewep_delay = 1000; 156int atw_beacon_len_adjust = 4; 157int atw_dwelltime = 200; 158int atw_xindiv2 = 0; 159 160#ifdef ATW_DEBUG 161int atw_debug = 0; 162 163#define ATW_DPRINTF(x) if (atw_debug > 0) printf x 164#define ATW_DPRINTF2(x) if (atw_debug > 1) printf x 165#define ATW_DPRINTF3(x) if (atw_debug > 2) printf x 166#define DPRINTF(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) printf x 167#define DPRINTF2(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF2(x) 168#define DPRINTF3(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF3(x) 169 170static void atw_print_regs(struct atw_softc *, const char *); 171static void atw_dump_pkt(struct ifnet *, struct mbuf *); 172 173/* Note well: I never got atw_rf3000_read or atw_si4126_read to work. */ 174# ifdef ATW_BBPDEBUG 175static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 176static void atw_rf3000_print(struct atw_softc *); 177# endif /* ATW_BBPDEBUG */ 178 179# ifdef ATW_SYNDEBUG 180static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 181static void atw_si4126_print(struct atw_softc *); 182# endif /* ATW_SYNDEBUG */ 183 184#else 185#define ATW_DPRINTF(x) 186#define ATW_DPRINTF2(x) 187#define ATW_DPRINTF3(x) 188#define DPRINTF(sc, x) /* nothing */ 189#define DPRINTF2(sc, x) /* nothing */ 190#define DPRINTF3(sc, x) /* nothing */ 191#endif 192 193/* ifnet methods */ 194void atw_start(struct ifnet *); 195void atw_watchdog(struct ifnet *); 196int atw_ioctl(struct ifnet *, u_long, caddr_t); 197int atw_init(struct ifnet *); 198void atw_stop(struct ifnet *, int); 199 200/* Device attachment */ 201void atw_attach(struct atw_softc *); 202int atw_detach(struct atw_softc *); 203 204/* Rx/Tx process */ 205void atw_rxdrain(struct atw_softc *); 206void atw_txdrain(struct atw_softc *); 207int atw_add_rxbuf(struct atw_softc *, int); 208void atw_idle(struct atw_softc *, u_int32_t); 209 210/* Device (de)activation and power state */ 211int atw_enable(struct atw_softc *); 212void atw_disable(struct atw_softc *); 213void atw_power(int, void *); 214void atw_shutdown(void *); 215void atw_reset(struct atw_softc *); 216 217/* Interrupt handlers */ 218void atw_rxintr(struct atw_softc *); 219void atw_txintr(struct atw_softc *); 220void atw_linkintr(struct atw_softc *, u_int32_t); 221 222/* 802.11 state machine */ 223static int atw_newstate(struct ieee80211com *, enum ieee80211_state, int); 224static int atw_tune(struct atw_softc *); 225static void atw_recv_mgmt(struct ieee80211com *, struct mbuf *, 226 struct ieee80211_node *, int, int, u_int32_t); 227 228/* Device initialization */ 229static void atw_wcsr_init(struct atw_softc *); 230static void atw_cmdr_init(struct atw_softc *); 231static void atw_tofs2_init(struct atw_softc *); 232static void atw_txlmt_init(struct atw_softc *); 233static void atw_test1_init(struct atw_softc *); 234static void atw_rf_reset(struct atw_softc *); 235static void atw_cfp_init(struct atw_softc *); 236static void atw_tofs0_init(struct atw_softc *); 237static void atw_ifs_init(struct atw_softc *); 238static void atw_response_times_init(struct atw_softc *); 239static void atw_bbp_io_init(struct atw_softc *); 240 241/* RAM/ROM utilities */ 242static void atw_clear_sram(struct atw_softc *); 243static void atw_write_sram(struct atw_softc *, u_int, u_int8_t *, u_int); 244static int atw_read_srom(struct atw_softc *); 245 246/* BSS setup */ 247static void atw_tsf(struct atw_softc *); 248static void atw_start_beacon(struct atw_softc *, int); 249static void atw_write_bssid(struct atw_softc *); 250static void atw_write_ssid(struct atw_softc *); 251static void atw_write_sup_rates(struct atw_softc *); 252static void atw_write_wep(struct atw_softc *); 253 254/* Media */ 255static int atw_media_change(struct ifnet *); 256static void atw_media_status(struct ifnet *, struct ifmediareq *); 257 258static void atw_filter_setup(struct atw_softc *); 259 260/* 802.11 utilities */ 261static void atw_frame_setdurs(struct atw_softc *, 262 struct atw_frame *, int, int); 263static struct ieee80211_node *atw_node_alloc(struct ieee80211com *); 264static void atw_node_free(struct ieee80211com *, 265 struct ieee80211_node *); 266static void atw_recv_beacon(struct ieee80211com *, struct mbuf *, 267 struct ieee80211_node *, int, int, 268 u_int32_t); 269static __inline uint32_t atw_last_even_tsft(uint32_t, uint32_t, 270 uint32_t); 271static __inline void atw_tsft(struct atw_softc *, uint32_t *, 272 uint32_t *); 273 274/* 275 * Tuner/transceiver/modem 276 */ 277static void atw_bbp_io_enable(struct atw_softc *, int); 278 279/* RFMD RF3000 Baseband Processor */ 280static int atw_rf3000_init(struct atw_softc *); 281static int atw_rf3000_tune(struct atw_softc *, u_int); 282static int atw_rf3000_write(struct atw_softc *, u_int, u_int); 283 284/* Silicon Laboratories Si4126 RF/IF Synthesizer */ 285static void atw_si4126_tune(struct atw_softc *, u_int); 286static void atw_si4126_write(struct atw_softc *, u_int, u_int); 287 288const struct atw_txthresh_tab atw_txthresh_tab_lo[] = ATW_TXTHRESH_TAB_LO_RATE; 289const struct atw_txthresh_tab atw_txthresh_tab_hi[] = ATW_TXTHRESH_TAB_HI_RATE; 290 291const char *atw_tx_state[] = { 292 "STOPPED", 293 "RUNNING - read descriptor", 294 "RUNNING - transmitting", 295 "RUNNING - filling fifo", /* XXX */ 296 "SUSPENDED", 297 "RUNNING -- write descriptor", 298 "RUNNING -- write last descriptor", 299 "RUNNING - fifo full" 300}; 301 302const char *atw_rx_state[] = { 303 "STOPPED", 304 "RUNNING - read descriptor", 305 "RUNNING - check this packet, pre-fetch next", 306 "RUNNING - wait for reception", 307 "SUSPENDED", 308 "RUNNING - write descriptor", 309 "RUNNING - flush fifo", 310 "RUNNING - fifo drain" 311}; 312 313int 314atw_activate(struct device *self, enum devact act) 315{ 316 struct atw_softc *sc = (struct atw_softc *)self; 317 int rv = 0, s; 318 319 s = splnet(); 320 switch (act) { 321 case DVACT_ACTIVATE: 322 rv = EOPNOTSUPP; 323 break; 324 325 case DVACT_DEACTIVATE: 326 if_deactivate(&sc->sc_ic.ic_if); 327 break; 328 } 329 splx(s); 330 return rv; 331} 332 333/* 334 * atw_enable: 335 * 336 * Enable the ADM8211 chip. 337 */ 338int 339atw_enable(struct atw_softc *sc) 340{ 341 342 if (ATW_IS_ENABLED(sc) == 0) { 343 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 344 printf("%s: device enable failed\n", 345 sc->sc_dev.dv_xname); 346 return (EIO); 347 } 348 sc->sc_flags |= ATWF_ENABLED; 349 } 350 return (0); 351} 352 353/* 354 * atw_disable: 355 * 356 * Disable the ADM8211 chip. 357 */ 358void 359atw_disable(struct atw_softc *sc) 360{ 361 if (!ATW_IS_ENABLED(sc)) 362 return; 363 if (sc->sc_disable != NULL) 364 (*sc->sc_disable)(sc); 365 sc->sc_flags &= ~ATWF_ENABLED; 366} 367 368/* Returns -1 on failure. */ 369static int 370atw_read_srom(struct atw_softc *sc) 371{ 372 struct seeprom_descriptor sd; 373 uint32_t test0, fail_bits; 374 375 (void)memset(&sd, 0, sizeof(sd)); 376 377 test0 = ATW_READ(sc, ATW_TEST0); 378 379 switch (sc->sc_rev) { 380 case ATW_REVISION_BA: 381 case ATW_REVISION_CA: 382 fail_bits = ATW_TEST0_EPNE; 383 break; 384 default: 385 fail_bits = ATW_TEST0_EPNE|ATW_TEST0_EPSNM; 386 break; 387 } 388 if ((test0 & fail_bits) != 0) { 389 printf("%s: bad or missing/bad SROM\n", sc->sc_dev.dv_xname); 390 return -1; 391 } 392 393 switch (test0 & ATW_TEST0_EPTYP_MASK) { 394 case ATW_TEST0_EPTYP_93c66: 395 ATW_DPRINTF(("%s: 93c66 SROM\n", sc->sc_dev.dv_xname)); 396 sc->sc_sromsz = 512; 397 sd.sd_chip = C56_66; 398 break; 399 case ATW_TEST0_EPTYP_93c46: 400 ATW_DPRINTF(("%s: 93c46 SROM\n", sc->sc_dev.dv_xname)); 401 sc->sc_sromsz = 128; 402 sd.sd_chip = C46; 403 break; 404 default: 405 printf("%s: unknown SROM type %d\n", sc->sc_dev.dv_xname, 406 MASK_AND_RSHIFT(test0, ATW_TEST0_EPTYP_MASK)); 407 return -1; 408 } 409 410 sc->sc_srom = malloc(sc->sc_sromsz, M_DEVBUF, M_NOWAIT); 411 412 if (sc->sc_srom == NULL) { 413 printf("%s: unable to allocate SROM buffer\n", 414 sc->sc_dev.dv_xname); 415 return -1; 416 } 417 418 (void)memset(sc->sc_srom, 0, sc->sc_sromsz); 419 420 /* ADM8211 has a single 32-bit register for controlling the 421 * 93cx6 SROM. Bit SRS enables the serial port. There is no 422 * "ready" bit. The ADM8211 input/output sense is the reverse 423 * of read_seeprom's. 424 */ 425 sd.sd_tag = sc->sc_st; 426 sd.sd_bsh = sc->sc_sh; 427 sd.sd_regsize = 4; 428 sd.sd_control_offset = ATW_SPR; 429 sd.sd_status_offset = ATW_SPR; 430 sd.sd_dataout_offset = ATW_SPR; 431 sd.sd_CK = ATW_SPR_SCLK; 432 sd.sd_CS = ATW_SPR_SCS; 433 sd.sd_DI = ATW_SPR_SDO; 434 sd.sd_DO = ATW_SPR_SDI; 435 sd.sd_MS = ATW_SPR_SRS; 436 sd.sd_RDY = 0; 437 438 if (!read_seeprom(&sd, sc->sc_srom, 0, sc->sc_sromsz/2)) { 439 printf("%s: could not read SROM\n", sc->sc_dev.dv_xname); 440 free(sc->sc_srom, M_DEVBUF); 441 return -1; 442 } 443#ifdef ATW_DEBUG 444 { 445 int i; 446 ATW_DPRINTF(("\nSerial EEPROM:\n\t")); 447 for (i = 0; i < sc->sc_sromsz/2; i = i + 1) { 448 if (((i % 8) == 0) && (i != 0)) { 449 ATW_DPRINTF(("\n\t")); 450 } 451 ATW_DPRINTF((" 0x%x", sc->sc_srom[i])); 452 } 453 ATW_DPRINTF(("\n")); 454 } 455#endif /* ATW_DEBUG */ 456 return 0; 457} 458 459#ifdef ATW_DEBUG 460static void 461atw_print_regs(struct atw_softc *sc, const char *where) 462{ 463#define PRINTREG(sc, reg) \ 464 ATW_DPRINTF2(("%s: reg[ " #reg " / %03x ] = %08x\n", \ 465 sc->sc_dev.dv_xname, reg, ATW_READ(sc, reg))) 466 467 ATW_DPRINTF2(("%s: %s\n", sc->sc_dev.dv_xname, where)); 468 469 PRINTREG(sc, ATW_PAR); 470 PRINTREG(sc, ATW_FRCTL); 471 PRINTREG(sc, ATW_TDR); 472 PRINTREG(sc, ATW_WTDP); 473 PRINTREG(sc, ATW_RDR); 474 PRINTREG(sc, ATW_WRDP); 475 PRINTREG(sc, ATW_RDB); 476 PRINTREG(sc, ATW_CSR3A); 477 PRINTREG(sc, ATW_TDBD); 478 PRINTREG(sc, ATW_TDBP); 479 PRINTREG(sc, ATW_STSR); 480 PRINTREG(sc, ATW_CSR5A); 481 PRINTREG(sc, ATW_NAR); 482 PRINTREG(sc, ATW_CSR6A); 483 PRINTREG(sc, ATW_IER); 484 PRINTREG(sc, ATW_CSR7A); 485 PRINTREG(sc, ATW_LPC); 486 PRINTREG(sc, ATW_TEST1); 487 PRINTREG(sc, ATW_SPR); 488 PRINTREG(sc, ATW_TEST0); 489 PRINTREG(sc, ATW_WCSR); 490 PRINTREG(sc, ATW_WPDR); 491 PRINTREG(sc, ATW_GPTMR); 492 PRINTREG(sc, ATW_GPIO); 493 PRINTREG(sc, ATW_BBPCTL); 494 PRINTREG(sc, ATW_SYNCTL); 495 PRINTREG(sc, ATW_PLCPHD); 496 PRINTREG(sc, ATW_MMIWADDR); 497 PRINTREG(sc, ATW_MMIRADDR1); 498 PRINTREG(sc, ATW_MMIRADDR2); 499 PRINTREG(sc, ATW_TXBR); 500 PRINTREG(sc, ATW_CSR15A); 501 PRINTREG(sc, ATW_ALCSTAT); 502 PRINTREG(sc, ATW_TOFS2); 503 PRINTREG(sc, ATW_CMDR); 504 PRINTREG(sc, ATW_PCIC); 505 PRINTREG(sc, ATW_PMCSR); 506 PRINTREG(sc, ATW_PAR0); 507 PRINTREG(sc, ATW_PAR1); 508 PRINTREG(sc, ATW_MAR0); 509 PRINTREG(sc, ATW_MAR1); 510 PRINTREG(sc, ATW_ATIMDA0); 511 PRINTREG(sc, ATW_ABDA1); 512 PRINTREG(sc, ATW_BSSID0); 513 PRINTREG(sc, ATW_TXLMT); 514 PRINTREG(sc, ATW_MIBCNT); 515 PRINTREG(sc, ATW_BCNT); 516 PRINTREG(sc, ATW_TSFTH); 517 PRINTREG(sc, ATW_TSC); 518 PRINTREG(sc, ATW_SYNRF); 519 PRINTREG(sc, ATW_BPLI); 520 PRINTREG(sc, ATW_CAP0); 521 PRINTREG(sc, ATW_CAP1); 522 PRINTREG(sc, ATW_RMD); 523 PRINTREG(sc, ATW_CFPP); 524 PRINTREG(sc, ATW_TOFS0); 525 PRINTREG(sc, ATW_TOFS1); 526 PRINTREG(sc, ATW_IFST); 527 PRINTREG(sc, ATW_RSPT); 528 PRINTREG(sc, ATW_TSFTL); 529 PRINTREG(sc, ATW_WEPCTL); 530 PRINTREG(sc, ATW_WESK); 531 PRINTREG(sc, ATW_WEPCNT); 532 PRINTREG(sc, ATW_MACTEST); 533 PRINTREG(sc, ATW_FER); 534 PRINTREG(sc, ATW_FEMR); 535 PRINTREG(sc, ATW_FPSR); 536 PRINTREG(sc, ATW_FFER); 537#undef PRINTREG 538} 539#endif /* ATW_DEBUG */ 540 541/* 542 * Finish attaching an ADMtek ADM8211 MAC. Called by bus-specific front-end. 543 */ 544void 545atw_attach(struct atw_softc *sc) 546{ 547 static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = { 548 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 549 }; 550 struct ieee80211com *ic = &sc->sc_ic; 551 struct ifnet *ifp = &ic->ic_if; 552 int country_code, error, i, nrate, srom_major; 553 u_int32_t reg; 554 static const char *type_strings[] = {"Intersil (not supported)", 555 "RFMD", "Marvel (not supported)"}; 556 557 sc->sc_txth = atw_txthresh_tab_lo; 558 559 SIMPLEQ_INIT(&sc->sc_txfreeq); 560 SIMPLEQ_INIT(&sc->sc_txdirtyq); 561 562#ifdef ATW_DEBUG 563 atw_print_regs(sc, "atw_attach"); 564#endif /* ATW_DEBUG */ 565 566 /* 567 * Allocate the control data structures, and create and load the 568 * DMA map for it. 569 */ 570 if ((error = bus_dmamem_alloc(sc->sc_dmat, 571 sizeof(struct atw_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 572 1, &sc->sc_cdnseg, 0)) != 0) { 573 printf("%s: unable to allocate control data, error = %d\n", 574 sc->sc_dev.dv_xname, error); 575 goto fail_0; 576 } 577 578 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg, 579 sizeof(struct atw_control_data), (caddr_t *)&sc->sc_control_data, 580 BUS_DMA_COHERENT)) != 0) { 581 printf("%s: unable to map control data, error = %d\n", 582 sc->sc_dev.dv_xname, error); 583 goto fail_1; 584 } 585 586 if ((error = bus_dmamap_create(sc->sc_dmat, 587 sizeof(struct atw_control_data), 1, 588 sizeof(struct atw_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 589 printf("%s: unable to create control data DMA map, " 590 "error = %d\n", sc->sc_dev.dv_xname, error); 591 goto fail_2; 592 } 593 594 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 595 sc->sc_control_data, sizeof(struct atw_control_data), NULL, 596 0)) != 0) { 597 printf("%s: unable to load control data DMA map, error = %d\n", 598 sc->sc_dev.dv_xname, error); 599 goto fail_3; 600 } 601 602 /* 603 * Create the transmit buffer DMA maps. 604 */ 605 sc->sc_ntxsegs = ATW_NTXSEGS; 606 for (i = 0; i < ATW_TXQUEUELEN; i++) { 607 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 608 sc->sc_ntxsegs, MCLBYTES, 0, 0, 609 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 610 printf("%s: unable to create tx DMA map %d, " 611 "error = %d\n", sc->sc_dev.dv_xname, i, error); 612 goto fail_4; 613 } 614 } 615 616 /* 617 * Create the receive buffer DMA maps. 618 */ 619 for (i = 0; i < ATW_NRXDESC; i++) { 620 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 621 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 622 printf("%s: unable to create rx DMA map %d, " 623 "error = %d\n", sc->sc_dev.dv_xname, i, error); 624 goto fail_5; 625 } 626 } 627 for (i = 0; i < ATW_NRXDESC; i++) { 628 sc->sc_rxsoft[i].rxs_mbuf = NULL; 629 } 630 631 switch (sc->sc_rev) { 632 case ATW_REVISION_AB: 633 case ATW_REVISION_AF: 634 sc->sc_sramlen = ATW_SRAM_A_SIZE; 635 break; 636 case ATW_REVISION_BA: 637 case ATW_REVISION_CA: 638 sc->sc_sramlen = ATW_SRAM_B_SIZE; 639 break; 640 } 641 642 /* Reset the chip to a known state. */ 643 atw_reset(sc); 644 645 if (atw_read_srom(sc) == -1) 646 return; 647 648 sc->sc_rftype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 649 ATW_SR_RFTYPE_MASK); 650 651 sc->sc_bbptype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 652 ATW_SR_BBPTYPE_MASK); 653 654 if (sc->sc_rftype > sizeof(type_strings)/sizeof(type_strings[0])) { 655 printf("%s: unknown RF\n", sc->sc_dev.dv_xname); 656 return; 657 } 658 if (sc->sc_bbptype > sizeof(type_strings)/sizeof(type_strings[0])) { 659 printf("%s: unknown BBP\n", sc->sc_dev.dv_xname); 660 return; 661 } 662 663 printf("%s: %s RF, %s BBP", sc->sc_dev.dv_xname, 664 type_strings[sc->sc_rftype], type_strings[sc->sc_bbptype]); 665 666 /* XXX There exists a Linux driver which seems to use RFType = 0 for 667 * MARVEL. My bug, or theirs? 668 */ 669 670 reg = LSHIFT(sc->sc_rftype, ATW_SYNCTL_RFTYPE_MASK); 671 672 switch (sc->sc_rftype) { 673 case ATW_RFTYPE_INTERSIL: 674 reg |= ATW_SYNCTL_CS1; 675 break; 676 case ATW_RFTYPE_RFMD: 677 reg |= ATW_SYNCTL_CS0; 678 break; 679 case ATW_RFTYPE_MARVEL: 680 break; 681 } 682 683 sc->sc_synctl_rd = reg | ATW_SYNCTL_RD; 684 sc->sc_synctl_wr = reg | ATW_SYNCTL_WR; 685 686 reg = LSHIFT(sc->sc_bbptype, ATW_BBPCTL_TYPE_MASK); 687 688 switch (sc->sc_bbptype) { 689 case ATW_BBPTYPE_INTERSIL: 690 reg |= ATW_BBPCTL_TWI; 691 break; 692 case ATW_BBPTYPE_RFMD: 693 reg |= ATW_BBPCTL_RF3KADDR_ADDR | ATW_BBPCTL_NEGEDGE_DO | 694 ATW_BBPCTL_CCA_ACTLO; 695 break; 696 case ATW_BBPTYPE_MARVEL: 697 break; 698 case ATW_C_BBPTYPE_RFMD: 699 printf("%s: ADM8211C MAC/RFMD BBP not supported yet.\n", 700 sc->sc_dev.dv_xname); 701 break; 702 } 703 704 sc->sc_bbpctl_wr = reg | ATW_BBPCTL_WR; 705 sc->sc_bbpctl_rd = reg | ATW_BBPCTL_RD; 706 707 /* 708 * From this point forward, the attachment cannot fail. A failure 709 * before this point releases all resources that may have been 710 * allocated. 711 */ 712 sc->sc_flags |= ATWF_ATTACHED /* | ATWF_RTSCTS */; 713 714 ATW_DPRINTF((" SROM MAC %04x%04x%04x", 715 htole16(sc->sc_srom[ATW_SR_MAC00]), 716 htole16(sc->sc_srom[ATW_SR_MAC01]), 717 htole16(sc->sc_srom[ATW_SR_MAC10]))); 718 719 srom_major = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_FORMAT_VERSION], 720 ATW_SR_MAJOR_MASK); 721 722 if (srom_major < 2) 723 sc->sc_rf3000_options1 = 0; 724 else if (sc->sc_rev == ATW_REVISION_BA) { 725 sc->sc_rf3000_options1 = 726 MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CR28_CR03], 727 ATW_SR_CR28_MASK); 728 } else 729 sc->sc_rf3000_options1 = 0; 730 731 sc->sc_rf3000_options2 = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CTRY_CR29], 732 ATW_SR_CR29_MASK); 733 734 country_code = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CTRY_CR29], 735 ATW_SR_CTRY_MASK); 736 737#define ADD_CHANNEL(_ic, _chan) do { \ 738 _ic->ic_channels[_chan].ic_flags = IEEE80211_CHAN_B; \ 739 _ic->ic_channels[_chan].ic_freq = \ 740 ieee80211_ieee2mhz(_chan, _ic->ic_channels[_chan].ic_flags);\ 741} while (0) 742 743 /* Find available channels */ 744 switch (country_code) { 745 case COUNTRY_MMK2: /* 1-14 */ 746 ADD_CHANNEL(ic, 14); 747 /*FALLTHROUGH*/ 748 case COUNTRY_ETSI: /* 1-13 */ 749 for (i = 1; i <= 13; i++) 750 ADD_CHANNEL(ic, i); 751 break; 752 case COUNTRY_FCC: /* 1-11 */ 753 case COUNTRY_IC: /* 1-11 */ 754 for (i = 1; i <= 11; i++) 755 ADD_CHANNEL(ic, i); 756 break; 757 case COUNTRY_MMK: /* 14 */ 758 ADD_CHANNEL(ic, 14); 759 break; 760 case COUNTRY_FRANCE: /* 10-13 */ 761 for (i = 10; i <= 13; i++) 762 ADD_CHANNEL(ic, i); 763 break; 764 default: /* assume channels 10-11 */ 765 case COUNTRY_SPAIN: /* 10-11 */ 766 for (i = 10; i <= 11; i++) 767 ADD_CHANNEL(ic, i); 768 break; 769 } 770 771 /* Read the MAC address. */ 772 reg = ATW_READ(sc, ATW_PAR0); 773 ic->ic_myaddr[0] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB0_MASK); 774 ic->ic_myaddr[1] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB1_MASK); 775 ic->ic_myaddr[2] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB2_MASK); 776 ic->ic_myaddr[3] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB3_MASK); 777 reg = ATW_READ(sc, ATW_PAR1); 778 ic->ic_myaddr[4] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB4_MASK); 779 ic->ic_myaddr[5] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB5_MASK); 780 781 if (IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) { 782 printf(" could not get mac address, attach failed\n"); 783 return; 784 } 785 786 printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr)); 787 788 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 789 ifp->if_softc = sc; 790 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST | 791 IFF_NOTRAILERS; 792 ifp->if_ioctl = atw_ioctl; 793 ifp->if_start = atw_start; 794 ifp->if_watchdog = atw_watchdog; 795 ifp->if_init = atw_init; 796 ifp->if_stop = atw_stop; 797 IFQ_SET_READY(&ifp->if_snd); 798 799 ic->ic_phytype = IEEE80211_T_DS; 800 ic->ic_opmode = IEEE80211_M_STA; 801 ic->ic_caps = IEEE80211_C_PMGT | IEEE80211_C_IBSS | 802 IEEE80211_C_HOSTAP | IEEE80211_C_MONITOR | IEEE80211_C_WEP; 803 804 nrate = 0; 805 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 2; 806 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 4; 807 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 11; 808 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 22; 809 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate; 810 811 /* 812 * Call MI attach routines. 813 */ 814 815 if_attach(ifp); 816 ieee80211_ifattach(ifp); 817 818 sc->sc_newstate = ic->ic_newstate; 819 ic->ic_newstate = atw_newstate; 820 821 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 822 ic->ic_recv_mgmt = atw_recv_mgmt; 823 824 sc->sc_node_free = ic->ic_node_free; 825 ic->ic_node_free = atw_node_free; 826 827 sc->sc_node_alloc = ic->ic_node_alloc; 828 ic->ic_node_alloc = atw_node_alloc; 829 830 /* possibly we should fill in our own sc_send_prresp, since 831 * the ADM8211 is probably sending probe responses in ad hoc 832 * mode. 833 */ 834 835 /* complete initialization */ 836 ieee80211_media_init(ifp, atw_media_change, atw_media_status); 837 callout_init(&sc->sc_scan_ch); 838 839#if NBPFILTER > 0 840 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 841 sizeof(struct ieee80211_frame) + 64, &sc->sc_radiobpf); 842#endif 843 844 /* 845 * Make sure the interface is shutdown during reboot. 846 */ 847 sc->sc_sdhook = shutdownhook_establish(atw_shutdown, sc); 848 if (sc->sc_sdhook == NULL) 849 printf("%s: WARNING: unable to establish shutdown hook\n", 850 sc->sc_dev.dv_xname); 851 852 /* 853 * Add a suspend hook to make sure we come back up after a 854 * resume. 855 */ 856 sc->sc_powerhook = powerhook_establish(atw_power, sc); 857 if (sc->sc_powerhook == NULL) 858 printf("%s: WARNING: unable to establish power hook\n", 859 sc->sc_dev.dv_xname); 860 861 memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu)); 862 sc->sc_rxtap.ar_ihdr.it_len = sizeof(sc->sc_rxtapu); 863 sc->sc_rxtap.ar_ihdr.it_present = ATW_RX_RADIOTAP_PRESENT; 864 865 memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu)); 866 sc->sc_txtap.at_ihdr.it_len = sizeof(sc->sc_txtapu); 867 sc->sc_txtap.at_ihdr.it_present = ATW_TX_RADIOTAP_PRESENT; 868 869 return; 870 871 /* 872 * Free any resources we've allocated during the failed attach 873 * attempt. Do this in reverse order and fall through. 874 */ 875 fail_5: 876 for (i = 0; i < ATW_NRXDESC; i++) { 877 if (sc->sc_rxsoft[i].rxs_dmamap == NULL) 878 continue; 879 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxsoft[i].rxs_dmamap); 880 } 881 fail_4: 882 for (i = 0; i < ATW_TXQUEUELEN; i++) { 883 if (sc->sc_txsoft[i].txs_dmamap == NULL) 884 continue; 885 bus_dmamap_destroy(sc->sc_dmat, sc->sc_txsoft[i].txs_dmamap); 886 } 887 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 888 fail_3: 889 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 890 fail_2: 891 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 892 sizeof(struct atw_control_data)); 893 fail_1: 894 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 895 fail_0: 896 return; 897} 898 899static struct ieee80211_node * 900atw_node_alloc(struct ieee80211com *ic) 901{ 902 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 903 struct ieee80211_node *ni = (*sc->sc_node_alloc)(ic); 904 905 DPRINTF(sc, ("%s: alloc node %p\n", sc->sc_dev.dv_xname, ni)); 906 return ni; 907} 908 909static void 910atw_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 911{ 912 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 913 914 DPRINTF(sc, ("%s: freeing node %p %s\n", sc->sc_dev.dv_xname, ni, 915 ether_sprintf(ni->ni_bssid))); 916 (*sc->sc_node_free)(ic, ni); 917} 918 919 920static void 921atw_test1_reset(struct atw_softc *sc) 922{ 923 switch (sc->sc_rev) { 924 case ATW_REVISION_BA: 925 if (1 /* XXX condition on transceiver type */) { 926 ATW_SET(sc, ATW_TEST1, ATW_TEST1_TESTMODE_MONITOR); 927 } 928 break; 929 case ATW_REVISION_CA: 930 ATW_CLR(sc, ATW_TEST1, ATW_TEST1_TESTMODE_MASK); 931 break; 932 default: 933 break; 934 } 935} 936 937/* 938 * atw_reset: 939 * 940 * Perform a soft reset on the ADM8211. 941 */ 942void 943atw_reset(struct atw_softc *sc) 944{ 945 int i; 946 uint32_t lpc; 947 948 ATW_WRITE(sc, ATW_NAR, 0x0); 949 DELAY(atw_nar_delay); 950 951 /* Reference driver has a cryptic remark indicating that this might 952 * power-on the chip. I know that it turns off power-saving.... 953 */ 954 ATW_WRITE(sc, ATW_FRCTL, 0x0); 955 956 ATW_WRITE(sc, ATW_PAR, ATW_PAR_SWR); 957 958 for (i = 0; i < 50000 / atw_pseudo_milli; i++) { 959 if (ATW_READ(sc, ATW_PAR) == 0) 960 break; 961 DELAY(atw_pseudo_milli); 962 } 963 964 /* ... and then pause 100ms longer for good measure. */ 965 DELAY(atw_magic_delay1); 966 967 DPRINTF2(sc, ("%s: atw_reset %d iterations\n", sc->sc_dev.dv_xname, i)); 968 969 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR)) 970 printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname); 971 972 atw_test1_reset(sc); 973 /* 974 * Initialize the PCI Access Register. 975 */ 976 sc->sc_busmode = ATW_PAR_PBL_8DW; 977 978 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 979 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 980 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 981 982 /* Turn off maximum power saving, etc. 983 * 984 * XXX Following example of reference driver, should I set 985 * an AID of 1? It didn't seem to help.... 986 */ 987 ATW_WRITE(sc, ATW_FRCTL, 0x0); 988 989 DELAY(atw_magic_delay2); 990 991 /* Recall EEPROM. */ 992 ATW_SET(sc, ATW_TEST0, ATW_TEST0_EPRLD); 993 994 DELAY(atw_magic_delay4); 995 996 lpc = ATW_READ(sc, ATW_LPC); 997 998 DPRINTF(sc, ("%s: ATW_LPC %#08x\n", __func__, lpc)); 999 1000 /* A reset seems to affect the SRAM contents, so put them into 1001 * a known state. 1002 */ 1003 atw_clear_sram(sc); 1004 1005 memset(sc->sc_bssid, 0xff, sizeof(sc->sc_bssid)); 1006} 1007 1008static void 1009atw_clear_sram(struct atw_softc *sc) 1010{ 1011 memset(sc->sc_sram, 0, sizeof(sc->sc_sram)); 1012 /* XXX not for revision 0x20. */ 1013 atw_write_sram(sc, 0, sc->sc_sram, sc->sc_sramlen); 1014} 1015 1016/* TBD atw_init 1017 * 1018 * set MAC based on ic->ic_bss->myaddr 1019 * write WEP keys 1020 * set TX rate 1021 */ 1022 1023/* Tell the ADM8211 to raise ATW_INTR_LINKOFF if 7 beacon intervals pass 1024 * without receiving a beacon with the preferred BSSID & SSID. 1025 * atw_write_bssid & atw_write_ssid set the BSSID & SSID. 1026 */ 1027static void 1028atw_wcsr_init(struct atw_softc *sc) 1029{ 1030 uint32_t wcsr; 1031 1032 wcsr = ATW_READ(sc, ATW_WCSR); 1033 wcsr &= ~(ATW_WCSR_BLN_MASK|ATW_WCSR_LSOE|ATW_WCSR_MPRE|ATW_WCSR_LSOE); 1034 wcsr |= LSHIFT(7, ATW_WCSR_BLN_MASK); 1035 ATW_WRITE(sc, ATW_WCSR, wcsr); /* XXX resets wake-up status bits */ 1036 1037 DPRINTF(sc, ("%s: %s reg[WCSR] = %08x\n", 1038 sc->sc_dev.dv_xname, __func__, ATW_READ(sc, ATW_WCSR))); 1039} 1040 1041/* Turn off power management. Set Rx store-and-forward mode. */ 1042static void 1043atw_cmdr_init(struct atw_softc *sc) 1044{ 1045 uint32_t cmdr; 1046 cmdr = ATW_READ(sc, ATW_CMDR); 1047 cmdr &= ~ATW_CMDR_APM; 1048 cmdr |= ATW_CMDR_RTE; 1049 cmdr &= ~ATW_CMDR_DRT_MASK; 1050 cmdr |= ATW_CMDR_DRT_SF; 1051 1052 ATW_WRITE(sc, ATW_CMDR, cmdr); 1053} 1054 1055static void 1056atw_tofs2_init(struct atw_softc *sc) 1057{ 1058 uint32_t tofs2; 1059 /* XXX this magic can probably be figured out from the RFMD docs */ 1060#ifndef ATW_REFSLAVE 1061 tofs2 = LSHIFT(4, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 1062 LSHIFT(13, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 1063 LSHIFT(8, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 1064 LSHIFT(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 1065 LSHIFT(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 1066 LSHIFT(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 1067 LSHIFT(4, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 1068 LSHIFT(5, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 1069#else 1070 /* XXX new magic from reference driver source */ 1071 tofs2 = LSHIFT(8, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 1072 LSHIFT(8, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 1073 LSHIFT(1, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 1074 LSHIFT(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 1075 LSHIFT(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 1076 LSHIFT(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 1077 LSHIFT(1, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 1078 LSHIFT(8, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 1079#endif 1080 ATW_WRITE(sc, ATW_TOFS2, tofs2); 1081} 1082 1083static void 1084atw_nar_init(struct atw_softc *sc) 1085{ 1086 ATW_WRITE(sc, ATW_NAR, ATW_NAR_SF|ATW_NAR_PB); 1087} 1088 1089static void 1090atw_txlmt_init(struct atw_softc *sc) 1091{ 1092 ATW_WRITE(sc, ATW_TXLMT, LSHIFT(512, ATW_TXLMT_MTMLT_MASK) | 1093 LSHIFT(1, ATW_TXLMT_SRTYLIM_MASK)); 1094} 1095 1096static void 1097atw_test1_init(struct atw_softc *sc) 1098{ 1099 uint32_t test1; 1100 1101 test1 = ATW_READ(sc, ATW_TEST1); 1102 test1 &= ~(ATW_TEST1_DBGREAD_MASK|ATW_TEST1_CONTROL); 1103 /* XXX magic 0x1 */ 1104 test1 |= LSHIFT(0x1, ATW_TEST1_DBGREAD_MASK) | ATW_TEST1_CONTROL; 1105 ATW_WRITE(sc, ATW_TEST1, test1); 1106} 1107 1108static void 1109atw_rf_reset(struct atw_softc *sc) 1110{ 1111 /* XXX this resets an Intersil RF front-end? */ 1112 /* TBD condition on Intersil RFType? */ 1113 ATW_WRITE(sc, ATW_SYNRF, ATW_SYNRF_INTERSIL_EN); 1114 DELAY(atw_rf_delay1); 1115 ATW_WRITE(sc, ATW_SYNRF, 0); 1116 DELAY(atw_rf_delay2); 1117} 1118 1119/* Set 16 TU max duration for the contention-free period (CFP). */ 1120static void 1121atw_cfp_init(struct atw_softc *sc) 1122{ 1123 uint32_t cfpp; 1124 1125 cfpp = ATW_READ(sc, ATW_CFPP); 1126 cfpp &= ~ATW_CFPP_CFPMD; 1127 cfpp |= LSHIFT(16, ATW_CFPP_CFPMD); 1128 ATW_WRITE(sc, ATW_CFPP, cfpp); 1129} 1130 1131static void 1132atw_tofs0_init(struct atw_softc *sc) 1133{ 1134 /* XXX I guess that the Cardbus clock is 22MHz? 1135 * I am assuming that the role of ATW_TOFS0_USCNT is 1136 * to divide the bus clock to get a 1MHz clock---the datasheet is not 1137 * very clear on this point. It says in the datasheet that it is 1138 * possible for the ADM8211 to accomodate bus speeds between 22MHz 1139 * and 33MHz; maybe this is the way? I see a binary-only driver write 1140 * these values. These values are also the power-on default. 1141 */ 1142 ATW_WRITE(sc, ATW_TOFS0, 1143 LSHIFT(22, ATW_TOFS0_USCNT_MASK) | 1144 ATW_TOFS0_TUCNT_MASK /* set all bits in TUCNT */); 1145} 1146 1147/* Initialize interframe spacing: 802.11b slot time, SIFS, DIFS, EIFS. */ 1148static void 1149atw_ifs_init(struct atw_softc *sc) 1150{ 1151 uint32_t ifst; 1152 /* XXX EIFS=0x64, SIFS=110 are used by the reference driver. 1153 * Go figure. 1154 */ 1155 ifst = LSHIFT(IEEE80211_DUR_DS_SLOT, ATW_IFST_SLOT_MASK) | 1156 LSHIFT(22 * 5 /* IEEE80211_DUR_DS_SIFS */ /* # of 22MHz cycles */, 1157 ATW_IFST_SIFS_MASK) | 1158 LSHIFT(IEEE80211_DUR_DS_DIFS, ATW_IFST_DIFS_MASK) | 1159 LSHIFT(0x64 /* IEEE80211_DUR_DS_EIFS */, ATW_IFST_EIFS_MASK); 1160 1161 ATW_WRITE(sc, ATW_IFST, ifst); 1162} 1163 1164static void 1165atw_response_times_init(struct atw_softc *sc) 1166{ 1167 /* XXX More magic. Relates to ACK timing? The datasheet seems to 1168 * indicate that the MAC expects at least SIFS + MIRT microseconds 1169 * to pass after it transmits a frame that requires a response; 1170 * it waits at most SIFS + MART microseconds for the response. 1171 * Surely this is not the ACK timeout? 1172 */ 1173 ATW_WRITE(sc, ATW_RSPT, LSHIFT(0xffff, ATW_RSPT_MART_MASK) | 1174 LSHIFT(0xff, ATW_RSPT_MIRT_MASK)); 1175} 1176 1177/* Set up the MMI read/write addresses for the baseband. The Tx/Rx 1178 * engines read and write baseband registers after Rx and before 1179 * Tx, respectively. 1180 */ 1181static void 1182atw_bbp_io_init(struct atw_softc *sc) 1183{ 1184 uint32_t mmiraddr2; 1185 1186 /* XXX The reference driver does this, but is it *really* 1187 * necessary? 1188 */ 1189 switch (sc->sc_rev) { 1190 case ATW_REVISION_AB: 1191 case ATW_REVISION_AF: 1192 mmiraddr2 = 0x0; 1193 break; 1194 default: 1195 mmiraddr2 = ATW_READ(sc, ATW_MMIRADDR2); 1196 mmiraddr2 &= 1197 ~(ATW_MMIRADDR2_PROREXT|ATW_MMIRADDR2_PRORLEN_MASK); 1198 break; 1199 } 1200 1201 switch (sc->sc_bbptype) { 1202 case ATW_BBPTYPE_INTERSIL: 1203 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_INTERSIL); 1204 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_INTERSIL); 1205 mmiraddr2 |= ATW_MMIRADDR2_INTERSIL; 1206 break; 1207 case ATW_BBPTYPE_MARVEL: 1208 /* TBD find out the Marvel settings. */ 1209 break; 1210 case ATW_BBPTYPE_RFMD: 1211 default: 1212 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_RFMD); 1213 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_RFMD); 1214 mmiraddr2 |= ATW_MMIRADDR2_RFMD; 1215 break; 1216 } 1217 ATW_WRITE(sc, ATW_MMIRADDR2, mmiraddr2); 1218 ATW_WRITE(sc, ATW_MACTEST, ATW_MACTEST_MMI_USETXCLK); 1219} 1220 1221/* 1222 * atw_init: [ ifnet interface function ] 1223 * 1224 * Initialize the interface. Must be called at splnet(). 1225 */ 1226int 1227atw_init(struct ifnet *ifp) 1228{ 1229 struct atw_softc *sc = ifp->if_softc; 1230 struct ieee80211com *ic = &sc->sc_ic; 1231 struct atw_txsoft *txs; 1232 struct atw_rxsoft *rxs; 1233 int i, error = 0; 1234 1235 if ((error = atw_enable(sc)) != 0) 1236 goto out; 1237 1238 /* 1239 * Cancel any pending I/O. This also resets. 1240 */ 1241 atw_stop(ifp, 0); 1242 1243 ic->ic_bss->ni_chan = ic->ic_ibss_chan; 1244 DPRINTF(sc, ("%s: channel %d freq %d flags 0x%04x\n", 1245 __func__, ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 1246 ic->ic_bss->ni_chan->ic_freq, ic->ic_bss->ni_chan->ic_flags)); 1247 1248 atw_wcsr_init(sc); 1249 1250 atw_cmdr_init(sc); 1251 1252 /* Set data rate for PLCP Signal field, 1Mbps = 10 x 100Kb/s. 1253 * 1254 * XXX Set transmit power for ATIM, RTS, Beacon. 1255 */ 1256 ATW_WRITE(sc, ATW_PLCPHD, LSHIFT(10, ATW_PLCPHD_SIGNAL_MASK) | 1257 LSHIFT(0xb0, ATW_PLCPHD_SERVICE_MASK)); 1258 1259 atw_tofs2_init(sc); 1260 1261 atw_nar_init(sc); 1262 1263 atw_txlmt_init(sc); 1264 1265 atw_test1_init(sc); 1266 1267 atw_rf_reset(sc); 1268 1269 atw_cfp_init(sc); 1270 1271 atw_tofs0_init(sc); 1272 1273 atw_ifs_init(sc); 1274 1275 /* XXX Fall asleep after one second of inactivity. 1276 * XXX A frame may only dribble in for 65536us. 1277 */ 1278 ATW_WRITE(sc, ATW_RMD, 1279 LSHIFT(1, ATW_RMD_PCNT) | LSHIFT(0xffff, ATW_RMD_RMRD_MASK)); 1280 1281 atw_response_times_init(sc); 1282 1283 atw_bbp_io_init(sc); 1284 1285 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1286 1287 if ((error = atw_rf3000_init(sc)) != 0) 1288 goto out; 1289 1290 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 1291 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1292 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1293 1294 /* 1295 * Initialize the transmit descriptor ring. 1296 */ 1297 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1298 for (i = 0; i < ATW_NTXDESC; i++) { 1299 sc->sc_txdescs[i].at_ctl = 0; 1300 /* no transmit chaining */ 1301 sc->sc_txdescs[i].at_flags = 0 /* ATW_TXFLAG_TCH */; 1302 sc->sc_txdescs[i].at_buf2 = 1303 htole32(ATW_CDTXADDR(sc, ATW_NEXTTX(i))); 1304 } 1305 /* use ring mode */ 1306 sc->sc_txdescs[ATW_NTXDESC - 1].at_flags |= htole32(ATW_TXFLAG_TER); 1307 ATW_CDTXSYNC(sc, 0, ATW_NTXDESC, 1308 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1309 sc->sc_txfree = ATW_NTXDESC; 1310 sc->sc_txnext = 0; 1311 1312 /* 1313 * Initialize the transmit job descriptors. 1314 */ 1315 SIMPLEQ_INIT(&sc->sc_txfreeq); 1316 SIMPLEQ_INIT(&sc->sc_txdirtyq); 1317 for (i = 0; i < ATW_TXQUEUELEN; i++) { 1318 txs = &sc->sc_txsoft[i]; 1319 txs->txs_mbuf = NULL; 1320 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1321 } 1322 1323 /* 1324 * Initialize the receive descriptor and receive job 1325 * descriptor rings. 1326 */ 1327 for (i = 0; i < ATW_NRXDESC; i++) { 1328 rxs = &sc->sc_rxsoft[i]; 1329 if (rxs->rxs_mbuf == NULL) { 1330 if ((error = atw_add_rxbuf(sc, i)) != 0) { 1331 printf("%s: unable to allocate or map rx " 1332 "buffer %d, error = %d\n", 1333 sc->sc_dev.dv_xname, i, error); 1334 /* 1335 * XXX Should attempt to run with fewer receive 1336 * XXX buffers instead of just failing. 1337 */ 1338 atw_rxdrain(sc); 1339 goto out; 1340 } 1341 } else 1342 ATW_INIT_RXDESC(sc, i); 1343 } 1344 sc->sc_rxptr = 0; 1345 1346 /* 1347 * Initialize the interrupt mask and enable interrupts. 1348 */ 1349 /* normal interrupts */ 1350 sc->sc_inten = ATW_INTR_TCI | ATW_INTR_TDU | ATW_INTR_RCI | 1351 ATW_INTR_NISS | ATW_INTR_LINKON | ATW_INTR_BCNTC; 1352 1353 /* abnormal interrupts */ 1354 sc->sc_inten |= ATW_INTR_TPS | ATW_INTR_TLT | ATW_INTR_TRT | 1355 ATW_INTR_TUF | ATW_INTR_RDU | ATW_INTR_RPS | ATW_INTR_AISS | 1356 ATW_INTR_FBE | ATW_INTR_LINKOFF | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1357 1358 sc->sc_linkint_mask = ATW_INTR_LINKON | ATW_INTR_LINKOFF | 1359 ATW_INTR_BCNTC | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1360 sc->sc_rxint_mask = ATW_INTR_RCI | ATW_INTR_RDU; 1361 sc->sc_txint_mask = ATW_INTR_TCI | ATW_INTR_TUF | ATW_INTR_TLT | 1362 ATW_INTR_TRT; 1363 1364 sc->sc_linkint_mask &= sc->sc_inten; 1365 sc->sc_rxint_mask &= sc->sc_inten; 1366 sc->sc_txint_mask &= sc->sc_inten; 1367 1368 ATW_WRITE(sc, ATW_IER, sc->sc_inten); 1369 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1370 1371 DPRINTF(sc, ("%s: ATW_IER %08x, inten %08x\n", 1372 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_IER), sc->sc_inten)); 1373 1374 /* 1375 * Give the transmit and receive rings to the ADM8211. 1376 */ 1377 ATW_WRITE(sc, ATW_RDB, ATW_CDRXADDR(sc, sc->sc_rxptr)); 1378 ATW_WRITE(sc, ATW_TDBD, ATW_CDTXADDR(sc, sc->sc_txnext)); 1379 1380 sc->sc_txthresh = 0; 1381 sc->sc_opmode = ATW_NAR_SR | ATW_NAR_ST | 1382 sc->sc_txth[sc->sc_txthresh].txth_opmode; 1383 1384 /* common 802.11 configuration */ 1385 ic->ic_flags &= ~IEEE80211_F_IBSSON; 1386 switch (ic->ic_opmode) { 1387 case IEEE80211_M_STA: 1388 break; 1389 case IEEE80211_M_AHDEMO: /* XXX */ 1390 case IEEE80211_M_IBSS: 1391 ic->ic_flags |= IEEE80211_F_IBSSON; 1392 /*FALLTHROUGH*/ 1393 case IEEE80211_M_HOSTAP: /* XXX */ 1394 break; 1395 case IEEE80211_M_MONITOR: /* XXX */ 1396 break; 1397 } 1398 1399 switch (ic->ic_opmode) { 1400 case IEEE80211_M_AHDEMO: 1401 case IEEE80211_M_HOSTAP: 1402 ic->ic_bss->ni_intval = ic->ic_lintval; 1403 ic->ic_bss->ni_rssi = 0; 1404 ic->ic_bss->ni_rstamp = 0; 1405 break; 1406 default: /* XXX */ 1407 break; 1408 } 1409 1410 sc->sc_wepctl = 0; 1411 1412 atw_write_ssid(sc); 1413 atw_write_sup_rates(sc); 1414 if (ic->ic_caps & IEEE80211_C_WEP) 1415 atw_write_wep(sc); 1416 1417 ic->ic_state = IEEE80211_S_INIT; 1418 1419 /* 1420 * Set the receive filter. This will start the transmit and 1421 * receive processes. 1422 */ 1423 atw_filter_setup(sc); 1424 1425 /* 1426 * Start the receive process. 1427 */ 1428 ATW_WRITE(sc, ATW_RDR, 0x1); 1429 1430 /* 1431 * Note that the interface is now running. 1432 */ 1433 ifp->if_flags |= IFF_RUNNING; 1434 ifp->if_flags &= ~IFF_OACTIVE; 1435 1436 /* send no beacons, yet. */ 1437 atw_start_beacon(sc, 0); 1438 1439 if (ic->ic_opmode == IEEE80211_M_MONITOR) 1440 error = ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1441 else 1442 error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1443 out: 1444 if (error) { 1445 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1446 ifp->if_timer = 0; 1447 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1448 } 1449#ifdef ATW_DEBUG 1450 atw_print_regs(sc, "end of init"); 1451#endif /* ATW_DEBUG */ 1452 1453 return (error); 1454} 1455 1456/* enable == 1: host control of RF3000/Si4126 through ATW_SYNCTL. 1457 * 0: MAC control of RF3000/Si4126. 1458 * 1459 * Applies power, or selects RF front-end? Sets reset condition. 1460 * 1461 * TBD support non-RFMD BBP, non-SiLabs synth. 1462 */ 1463static void 1464atw_bbp_io_enable(struct atw_softc *sc, int enable) 1465{ 1466 if (enable) { 1467 ATW_WRITE(sc, ATW_SYNRF, 1468 ATW_SYNRF_SELRF|ATW_SYNRF_PE1|ATW_SYNRF_PHYRST); 1469 DELAY(atw_bbp_io_enable_delay); 1470 } else { 1471 ATW_WRITE(sc, ATW_SYNRF, 0); 1472 DELAY(atw_bbp_io_disable_delay); /* shorter for some reason */ 1473 } 1474} 1475 1476static int 1477atw_tune(struct atw_softc *sc) 1478{ 1479 int rc; 1480 u_int chan; 1481 struct ieee80211com *ic = &sc->sc_ic; 1482 1483 chan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 1484 if (chan == IEEE80211_CHAN_ANY) 1485 panic("%s: chan == IEEE80211_CHAN_ANY\n", __func__); 1486 1487 if (chan == sc->sc_cur_chan) 1488 return 0; 1489 1490 DPRINTF(sc, ("%s: chan %d -> %d\n", sc->sc_dev.dv_xname, 1491 sc->sc_cur_chan, chan)); 1492 1493 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1494 1495 atw_si4126_tune(sc, chan); 1496 if ((rc = atw_rf3000_tune(sc, chan)) != 0) 1497 printf("%s: failed to tune channel %d\n", sc->sc_dev.dv_xname, 1498 chan); 1499 1500 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1501 DELAY(atw_nar_delay); 1502 ATW_WRITE(sc, ATW_RDR, 0x1); 1503 1504 if (rc == 0) 1505 sc->sc_cur_chan = chan; 1506 1507 return rc; 1508} 1509 1510#ifdef ATW_SYNDEBUG 1511static void 1512atw_si4126_print(struct atw_softc *sc) 1513{ 1514 struct ifnet *ifp = &sc->sc_ic.ic_if; 1515 u_int addr, val; 1516 1517 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1518 return; 1519 1520 for (addr = 0; addr <= 8; addr++) { 1521 printf("%s: synth[%d] = ", sc->sc_dev.dv_xname, addr); 1522 if (atw_si4126_read(sc, addr, &val) == 0) { 1523 printf("<unknown> (quitting print-out)\n"); 1524 break; 1525 } 1526 printf("%05x\n", val); 1527 } 1528} 1529#endif /* ATW_SYNDEBUG */ 1530 1531/* Tune to channel chan by adjusting the Si4126 RF/IF synthesizer. 1532 * 1533 * The RF/IF synthesizer produces two reference frequencies for 1534 * the RF2948B transceiver. The first frequency the RF2948B requires 1535 * is two times the so-called "intermediate frequency" (IF). Since 1536 * a SAW filter on the radio fixes the IF at 374MHz, I program the 1537 * Si4126 to generate IF LO = 374MHz x 2 = 748MHz. The second 1538 * frequency required by the transceiver is the radio frequency 1539 * (RF). This is a superheterodyne transceiver; for f(chan) the 1540 * center frequency of the channel we are tuning, RF = f(chan) - 1541 * IF. 1542 * 1543 * XXX I am told by SiLabs that the Si4126 will accept a broader range 1544 * of XIN than the 2-25MHz mentioned by the datasheet, even *without* 1545 * XINDIV2 = 1. I've tried this (it is necessary to double R) and it 1546 * works, but I have still programmed for XINDIV2 = 1 to be safe. 1547 */ 1548static void 1549atw_si4126_tune(struct atw_softc *sc, u_int chan) 1550{ 1551 u_int mhz; 1552 u_int R; 1553 u_int32_t gpio; 1554 u_int16_t gain; 1555 1556#ifdef ATW_SYNDEBUG 1557 atw_si4126_print(sc); 1558#endif /* ATW_SYNDEBUG */ 1559 1560 if (chan == 14) 1561 mhz = 2484; 1562 else 1563 mhz = 2412 + 5 * (chan - 1); 1564 1565 /* Tune IF to 748MHz to suit the IF LO input of the 1566 * RF2494B, which is 2 x IF. No need to set an IF divider 1567 * because an IF in 526MHz - 952MHz is allowed. 1568 * 1569 * XIN is 44.000MHz, so divide it by two to get allowable 1570 * range of 2-25MHz. SiLabs tells me that this is not 1571 * strictly necessary. 1572 */ 1573 1574 if (atw_xindiv2) 1575 R = 44; 1576 else 1577 R = 88; 1578 1579 /* Power-up RF, IF synthesizers. */ 1580 atw_si4126_write(sc, SI4126_POWER, 1581 SI4126_POWER_PDIB|SI4126_POWER_PDRB); 1582 1583 /* set LPWR, too? */ 1584 atw_si4126_write(sc, SI4126_MAIN, 1585 (atw_xindiv2) ? SI4126_MAIN_XINDIV2 : 0); 1586 1587 /* Set the phase-locked loop gain. If RF2 N > 2047, then 1588 * set KP2 to 1. 1589 * 1590 * REFDIF This is different from the reference driver, which 1591 * always sets SI4126_GAIN to 0. 1592 */ 1593 gain = LSHIFT(((mhz - 374) > 2047) ? 1 : 0, SI4126_GAIN_KP2_MASK); 1594 1595 atw_si4126_write(sc, SI4126_GAIN, gain); 1596 1597 /* XIN = 44MHz. 1598 * 1599 * If XINDIV2 = 1, IF = N/(2 * R) * XIN. I choose N = 1496, 1600 * R = 44 so that 1496/(2 * 44) * 44MHz = 748MHz. 1601 * 1602 * If XINDIV2 = 0, IF = N/R * XIN. I choose N = 1496, R = 88 1603 * so that 1496/88 * 44MHz = 748MHz. 1604 */ 1605 atw_si4126_write(sc, SI4126_IFN, 1496); 1606 1607 atw_si4126_write(sc, SI4126_IFR, R); 1608 1609#ifndef ATW_REFSLAVE 1610 /* Set RF1 arbitrarily. DO NOT configure RF1 after RF2, because 1611 * then RF1 becomes the active RF synthesizer, even on the Si4126, 1612 * which has no RF1! 1613 */ 1614 atw_si4126_write(sc, SI4126_RF1R, R); 1615 1616 atw_si4126_write(sc, SI4126_RF1N, mhz - 374); 1617#endif 1618 1619 /* N/R * XIN = RF. XIN = 44MHz. We desire RF = mhz - IF, 1620 * where IF = 374MHz. Let's divide XIN to 1MHz. So R = 44. 1621 * Now let's multiply it to mhz. So mhz - IF = N. 1622 */ 1623 atw_si4126_write(sc, SI4126_RF2R, R); 1624 1625 atw_si4126_write(sc, SI4126_RF2N, mhz - 374); 1626 1627 /* wait 100us from power-up for RF, IF to settle */ 1628 DELAY(100); 1629 1630 gpio = ATW_READ(sc, ATW_GPIO); 1631 gpio &= ~(ATW_GPIO_EN_MASK|ATW_GPIO_O_MASK|ATW_GPIO_I_MASK); 1632 gpio |= LSHIFT(1, ATW_GPIO_EN_MASK); 1633 1634 if ((sc->sc_if.if_flags & IFF_LINK1) != 0 && chan != 14) { 1635 /* Set a Prism RF front-end to a special mode for channel 14? 1636 * 1637 * Apparently the SMC2635W needs this, although I don't think 1638 * it has a Prism RF. 1639 */ 1640 gpio |= LSHIFT(1, ATW_GPIO_O_MASK); 1641 } 1642 ATW_WRITE(sc, ATW_GPIO, gpio); 1643 1644#ifdef ATW_SYNDEBUG 1645 atw_si4126_print(sc); 1646#endif /* ATW_SYNDEBUG */ 1647} 1648 1649/* Baseline initialization of RF3000 BBP: set CCA mode and enable antenna 1650 * diversity. 1651 * 1652 * !!! 1653 * !!! Call this w/ Tx/Rx suspended, atw_idle(, ATW_NAR_ST|ATW_NAR_SR). 1654 * !!! 1655 */ 1656static int 1657atw_rf3000_init(struct atw_softc *sc) 1658{ 1659 int rc = 0; 1660 1661 atw_bbp_io_enable(sc, 1); 1662 1663 /* CCA is acquisition sensitive */ 1664 rc = atw_rf3000_write(sc, RF3000_CCACTL, 1665 LSHIFT(RF3000_CCACTL_MODE_BOTH, RF3000_CCACTL_MODE_MASK)); 1666 1667 if (rc != 0) 1668 goto out; 1669 1670 /* enable diversity */ 1671 rc = atw_rf3000_write(sc, RF3000_DIVCTL, RF3000_DIVCTL_ENABLE); 1672 1673 if (rc != 0) 1674 goto out; 1675 1676 /* sensible setting from a binary-only driver */ 1677 rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1678 LSHIFT(0x1d, RF3000_GAINCTL_TXVGC_MASK)); 1679 1680 if (rc != 0) 1681 goto out; 1682 1683 /* magic from a binary-only driver */ 1684 rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, 1685 LSHIFT(0x38, RF3000_LOGAINCAL_CAL_MASK)); 1686 1687 if (rc != 0) 1688 goto out; 1689 1690 rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, RF3000_HIGAINCAL_DSSSPAD); 1691 1692 if (rc != 0) 1693 goto out; 1694 1695 /* XXX Reference driver remarks that Abocom sets this to 50. 1696 * Meaning 0x50, I think.... 50 = 0x32, which would set a bit 1697 * in the "reserved" area of register RF3000_OPTIONS1. 1698 */ 1699 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, sc->sc_rf3000_options1); 1700 1701 if (rc != 0) 1702 goto out; 1703 1704 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, sc->sc_rf3000_options2); 1705 1706 if (rc != 0) 1707 goto out; 1708 1709out: 1710 atw_bbp_io_enable(sc, 0); 1711 return rc; 1712} 1713 1714#ifdef ATW_BBPDEBUG 1715static void 1716atw_rf3000_print(struct atw_softc *sc) 1717{ 1718 struct ifnet *ifp = &sc->sc_ic.ic_if; 1719 u_int addr, val; 1720 1721 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1722 return; 1723 1724 for (addr = 0x01; addr <= 0x15; addr++) { 1725 printf("%s: bbp[%d] = \n", sc->sc_dev.dv_xname, addr); 1726 if (atw_rf3000_read(sc, addr, &val) != 0) { 1727 printf("<unknown> (quitting print-out)\n"); 1728 break; 1729 } 1730 printf("%08x\n", val); 1731 } 1732} 1733#endif /* ATW_BBPDEBUG */ 1734 1735/* Set the power settings on the BBP for channel `chan'. */ 1736static int 1737atw_rf3000_tune(struct atw_softc *sc, u_int chan) 1738{ 1739 int rc = 0; 1740 u_int32_t reg; 1741 u_int16_t txpower, lpf_cutoff, lna_gs_thresh; 1742 1743 txpower = sc->sc_srom[ATW_SR_TXPOWER(chan)]; 1744 lpf_cutoff = sc->sc_srom[ATW_SR_LPF_CUTOFF(chan)]; 1745 lna_gs_thresh = sc->sc_srom[ATW_SR_LNA_GS_THRESH(chan)]; 1746 1747 /* odd channels: LSB, even channels: MSB */ 1748 if (chan % 2 == 1) { 1749 txpower &= 0xFF; 1750 lpf_cutoff &= 0xFF; 1751 lna_gs_thresh &= 0xFF; 1752 } else { 1753 txpower >>= 8; 1754 lpf_cutoff >>= 8; 1755 lna_gs_thresh >>= 8; 1756 } 1757 1758#ifdef ATW_BBPDEBUG 1759 atw_rf3000_print(sc); 1760#endif /* ATW_BBPDEBUG */ 1761 1762 DPRINTF(sc, ("%s: chan %d txpower %02x, lpf_cutoff %02x, " 1763 "lna_gs_thresh %02x\n", 1764 sc->sc_dev.dv_xname, chan, txpower, lpf_cutoff, lna_gs_thresh)); 1765 1766 atw_bbp_io_enable(sc, 1); 1767 1768 if ((rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1769 LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK))) != 0) 1770 goto out; 1771 1772 if ((rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, lpf_cutoff)) != 0) 1773 goto out; 1774 1775 if ((rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, lna_gs_thresh)) != 0) 1776 goto out; 1777 1778 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, 0x0); 1779 1780 if (rc != 0) 1781 goto out; 1782 1783 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, RF3000_OPTIONS2_LNAGS_DELAY); 1784 1785 if (rc != 0) 1786 goto out; 1787 1788#ifdef ATW_BBPDEBUG 1789 atw_rf3000_print(sc); 1790#endif /* ATW_BBPDEBUG */ 1791 1792out: 1793 atw_bbp_io_enable(sc, 0); 1794 1795 /* set beacon, rts, atim transmit power */ 1796 reg = ATW_READ(sc, ATW_PLCPHD); 1797 reg &= ~ATW_PLCPHD_SERVICE_MASK; 1798 reg |= LSHIFT(LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK), 1799 ATW_PLCPHD_SERVICE_MASK); 1800 ATW_WRITE(sc, ATW_PLCPHD, reg); 1801 DELAY(atw_plcphd_delay); 1802 1803 return rc; 1804} 1805 1806/* Write a register on the RF3000 baseband processor using the 1807 * registers provided by the ADM8211 for this purpose. 1808 * 1809 * Return 0 on success. 1810 */ 1811static int 1812atw_rf3000_write(struct atw_softc *sc, u_int addr, u_int val) 1813{ 1814 u_int32_t reg; 1815 int i; 1816 1817 reg = sc->sc_bbpctl_wr | 1818 LSHIFT(val & 0xff, ATW_BBPCTL_DATA_MASK) | 1819 LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1820 1821 for (i = 20000 / atw_pseudo_milli; --i >= 0; ) { 1822 ATW_WRITE(sc, ATW_BBPCTL, reg); 1823 DELAY(2 * atw_pseudo_milli); 1824 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_WR) == 0) 1825 break; 1826 } 1827 1828 if (i < 0) { 1829 printf("%s: BBPCTL still busy\n", sc->sc_dev.dv_xname); 1830 return ETIMEDOUT; 1831 } 1832 return 0; 1833} 1834 1835/* Read a register on the RF3000 baseband processor using the registers 1836 * the ADM8211 provides for this purpose. 1837 * 1838 * The 7-bit register address is addr. Record the 8-bit data in the register 1839 * in *val. 1840 * 1841 * Return 0 on success. 1842 * 1843 * XXX This does not seem to work. The ADM8211 must require more or 1844 * different magic to read the chip than to write it. Possibly some 1845 * of the magic I have derived from a binary-only driver concerns 1846 * the "chip address" (see the RF3000 manual). 1847 */ 1848#ifdef ATW_BBPDEBUG 1849static int 1850atw_rf3000_read(struct atw_softc *sc, u_int addr, u_int *val) 1851{ 1852 u_int32_t reg; 1853 int i; 1854 1855 for (i = 1000; --i >= 0; ) { 1856 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1857 break; 1858 DELAY(100); 1859 } 1860 1861 if (i < 0) { 1862 printf("%s: start atw_rf3000_read, BBPCTL busy\n", 1863 sc->sc_dev.dv_xname); 1864 return ETIMEDOUT; 1865 } 1866 1867 reg = sc->sc_bbpctl_rd | LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1868 1869 ATW_WRITE(sc, ATW_BBPCTL, reg); 1870 1871 for (i = 1000; --i >= 0; ) { 1872 DELAY(100); 1873 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD) == 0) 1874 break; 1875 } 1876 1877 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_RD); 1878 1879 if (i < 0) { 1880 printf("%s: atw_rf3000_read wrote %08x; BBPCTL still busy\n", 1881 sc->sc_dev.dv_xname, reg); 1882 return ETIMEDOUT; 1883 } 1884 if (val != NULL) 1885 *val = MASK_AND_RSHIFT(reg, ATW_BBPCTL_DATA_MASK); 1886 return 0; 1887} 1888#endif /* ATW_BBPDEBUG */ 1889 1890/* Write a register on the Si4126 RF/IF synthesizer using the registers 1891 * provided by the ADM8211 for that purpose. 1892 * 1893 * val is 18 bits of data, and val is the 4-bit address of the register. 1894 * 1895 * Return 0 on success. 1896 */ 1897static void 1898atw_si4126_write(struct atw_softc *sc, u_int addr, u_int val) 1899{ 1900 uint32_t bits, mask, reg; 1901 const int nbits = 22; 1902 1903 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1904 KASSERT((val & ~PRESHIFT(SI4126_TWI_DATA_MASK)) == 0); 1905 1906 bits = LSHIFT(val, SI4126_TWI_DATA_MASK) | 1907 LSHIFT(addr, SI4126_TWI_ADDR_MASK); 1908 1909 reg = ATW_SYNRF_SELSYN; 1910 /* reference driver: reset Si4126 serial bus to initial 1911 * conditions? 1912 */ 1913 ATW_WRITE(sc, ATW_SYNRF, reg | ATW_SYNRF_LEIF); 1914 ATW_WRITE(sc, ATW_SYNRF, reg); 1915 1916 for (mask = BIT(nbits - 1); mask != 0; mask >>= 1) { 1917 if ((bits & mask) != 0) 1918 reg |= ATW_SYNRF_SYNDATA; 1919 else 1920 reg &= ~ATW_SYNRF_SYNDATA; 1921 ATW_WRITE(sc, ATW_SYNRF, reg); 1922 ATW_WRITE(sc, ATW_SYNRF, reg | ATW_SYNRF_SYNCLK); 1923 ATW_WRITE(sc, ATW_SYNRF, reg); 1924 } 1925 ATW_WRITE(sc, ATW_SYNRF, reg | ATW_SYNRF_LEIF); 1926 ATW_WRITE(sc, ATW_SYNRF, 0x0); 1927} 1928 1929/* Read 18-bit data from the 4-bit address addr in Si4126 1930 * RF synthesizer and write the data to *val. Return 0 on success. 1931 * 1932 * XXX This does not seem to work. The ADM8211 must require more or 1933 * different magic to read the chip than to write it. 1934 */ 1935#ifdef ATW_SYNDEBUG 1936static int 1937atw_si4126_read(struct atw_softc *sc, u_int addr, u_int *val) 1938{ 1939 u_int32_t reg; 1940 int i; 1941 1942 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1943 1944 for (i = 1000; --i >= 0; ) { 1945 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1946 break; 1947 DELAY(100); 1948 } 1949 1950 if (i < 0) { 1951 printf("%s: start atw_si4126_read, SYNCTL busy\n", 1952 sc->sc_dev.dv_xname); 1953 return ETIMEDOUT; 1954 } 1955 1956 reg = sc->sc_synctl_rd | LSHIFT(addr, ATW_SYNCTL_DATA_MASK); 1957 1958 ATW_WRITE(sc, ATW_SYNCTL, reg); 1959 1960 for (i = 1000; --i >= 0; ) { 1961 DELAY(100); 1962 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0) 1963 break; 1964 } 1965 1966 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD); 1967 1968 if (i < 0) { 1969 printf("%s: atw_si4126_read wrote %#08x, SYNCTL still busy\n", 1970 sc->sc_dev.dv_xname, reg); 1971 return ETIMEDOUT; 1972 } 1973 if (val != NULL) 1974 *val = MASK_AND_RSHIFT(ATW_READ(sc, ATW_SYNCTL), 1975 ATW_SYNCTL_DATA_MASK); 1976 return 0; 1977} 1978#endif /* ATW_SYNDEBUG */ 1979 1980/* XXX is the endianness correct? test. */ 1981#define atw_calchash(addr) \ 1982 (ether_crc32_le((addr), IEEE80211_ADDR_LEN) & BITS(5, 0)) 1983 1984/* 1985 * atw_filter_setup: 1986 * 1987 * Set the ADM8211's receive filter. 1988 */ 1989static void 1990atw_filter_setup(struct atw_softc *sc) 1991{ 1992 struct ieee80211com *ic = &sc->sc_ic; 1993 struct ethercom *ec = &ic->ic_ec; 1994 struct ifnet *ifp = &sc->sc_ic.ic_if; 1995 int hash; 1996 u_int32_t hashes[2]; 1997 struct ether_multi *enm; 1998 struct ether_multistep step; 1999 2000 /* According to comments in tlp_al981_filter_setup 2001 * (dev/ic/tulip.c) the ADMtek AL981 does not like for its 2002 * multicast filter to be set while it is running. Hopefully 2003 * the ADM8211 is not the same! 2004 */ 2005 if ((ifp->if_flags & IFF_RUNNING) != 0) 2006 atw_idle(sc, ATW_NAR_SR); 2007 2008 sc->sc_opmode &= ~(ATW_NAR_PR|ATW_NAR_MM); 2009 2010 /* XXX in scan mode, do not filter packets. Maybe this is 2011 * unnecessary. 2012 */ 2013 if (ic->ic_state == IEEE80211_S_SCAN || 2014 (ifp->if_flags & IFF_PROMISC) != 0) { 2015 sc->sc_opmode |= ATW_NAR_PR; 2016 goto allmulti; 2017 } 2018 2019 hashes[0] = hashes[1] = 0x0; 2020 2021 /* 2022 * Program the 64-bit multicast hash filter. 2023 */ 2024 ETHER_FIRST_MULTI(step, ec, enm); 2025 while (enm != NULL) { 2026 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 2027 ETHER_ADDR_LEN) != 0) 2028 goto allmulti; 2029 2030 hash = atw_calchash(enm->enm_addrlo); 2031 hashes[hash >> 5] |= 1 << (hash & 0x1f); 2032 ETHER_NEXT_MULTI(step, enm); 2033 } 2034 ifp->if_flags &= ~IFF_ALLMULTI; 2035 goto setit; 2036 2037allmulti: 2038 ifp->if_flags |= IFF_ALLMULTI; 2039 hashes[0] = hashes[1] = 0xffffffff; 2040 2041setit: 2042 ATW_WRITE(sc, ATW_MAR0, hashes[0]); 2043 ATW_WRITE(sc, ATW_MAR1, hashes[1]); 2044 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2045 DELAY(atw_nar_delay); 2046 2047 DPRINTF(sc, ("%s: ATW_NAR %08x opmode %08x\n", sc->sc_dev.dv_xname, 2048 ATW_READ(sc, ATW_NAR), sc->sc_opmode)); 2049} 2050 2051/* Tell the ADM8211 our preferred BSSID. The ADM8211 must match 2052 * a beacon's BSSID and SSID against the preferred BSSID and SSID 2053 * before it will raise ATW_INTR_LINKON. When the ADM8211 receives 2054 * no beacon with the preferred BSSID and SSID in the number of 2055 * beacon intervals given in ATW_BPLI, then it raises ATW_INTR_LINKOFF. 2056 */ 2057static void 2058atw_write_bssid(struct atw_softc *sc) 2059{ 2060 struct ieee80211com *ic = &sc->sc_ic; 2061 u_int8_t *bssid; 2062 2063 bssid = ic->ic_bss->ni_bssid; 2064 2065 ATW_WRITE(sc, ATW_BSSID0, 2066 LSHIFT(bssid[0], ATW_BSSID0_BSSIDB0_MASK) | 2067 LSHIFT(bssid[1], ATW_BSSID0_BSSIDB1_MASK) | 2068 LSHIFT(bssid[2], ATW_BSSID0_BSSIDB2_MASK) | 2069 LSHIFT(bssid[3], ATW_BSSID0_BSSIDB3_MASK)); 2070 2071 ATW_WRITE(sc, ATW_ABDA1, 2072 (ATW_READ(sc, ATW_ABDA1) & 2073 ~(ATW_ABDA1_BSSIDB4_MASK|ATW_ABDA1_BSSIDB5_MASK)) | 2074 LSHIFT(bssid[4], ATW_ABDA1_BSSIDB4_MASK) | 2075 LSHIFT(bssid[5], ATW_ABDA1_BSSIDB5_MASK)); 2076 2077 DPRINTF(sc, ("%s: BSSID %s -> ", sc->sc_dev.dv_xname, 2078 ether_sprintf(sc->sc_bssid))); 2079 DPRINTF(sc, ("%s\n", ether_sprintf(bssid))); 2080 2081 memcpy(sc->sc_bssid, bssid, sizeof(sc->sc_bssid)); 2082} 2083 2084/* Write buflen bytes from buf to SRAM starting at the SRAM's ofs'th 2085 * 16-bit word. 2086 */ 2087static void 2088atw_write_sram(struct atw_softc *sc, u_int ofs, u_int8_t *buf, u_int buflen) 2089{ 2090 u_int i; 2091 u_int8_t *ptr; 2092 2093 memcpy(&sc->sc_sram[ofs], buf, buflen); 2094 2095 KASSERT(ofs % 2 == 0 && buflen % 2 == 0); 2096 2097 KASSERT(buflen + ofs <= sc->sc_sramlen); 2098 2099 ptr = &sc->sc_sram[ofs]; 2100 2101 for (i = 0; i < buflen; i += 2) { 2102 ATW_WRITE(sc, ATW_WEPCTL, ATW_WEPCTL_WR | 2103 LSHIFT((ofs + i) / 2, ATW_WEPCTL_TBLADD_MASK)); 2104 DELAY(atw_writewep_delay); 2105 2106 ATW_WRITE(sc, ATW_WESK, 2107 LSHIFT((ptr[i + 1] << 8) | ptr[i], ATW_WESK_DATA_MASK)); 2108 DELAY(atw_writewep_delay); 2109 } 2110 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); /* restore WEP condition */ 2111 2112 if (sc->sc_if.if_flags & IFF_DEBUG) { 2113 int n_octets = 0; 2114 printf("%s: wrote %d bytes at 0x%x wepctl 0x%08x\n", 2115 sc->sc_dev.dv_xname, buflen, ofs, sc->sc_wepctl); 2116 for (i = 0; i < buflen; i++) { 2117 printf(" %02x", ptr[i]); 2118 if (++n_octets % 24 == 0) 2119 printf("\n"); 2120 } 2121 if (n_octets % 24 != 0) 2122 printf("\n"); 2123 } 2124} 2125 2126/* Write WEP keys from the ieee80211com to the ADM8211's SRAM. */ 2127static void 2128atw_write_wep(struct atw_softc *sc) 2129{ 2130 struct ieee80211com *ic = &sc->sc_ic; 2131 /* SRAM shared-key record format: key0 flags key1 ... key12 */ 2132 u_int8_t buf[IEEE80211_WEP_NKID] 2133 [1 /* key[0] */ + 1 /* flags */ + 12 /* key[1 .. 12] */]; 2134 u_int32_t reg; 2135 int i; 2136 2137 sc->sc_wepctl = 0; 2138 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); 2139 2140 if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) 2141 return; 2142 2143 memset(&buf[0][0], 0, sizeof(buf)); 2144 2145 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 2146 if (ic->ic_nw_keys[i].wk_len > 5) { 2147 buf[i][1] = ATW_WEP_ENABLED | ATW_WEP_104BIT; 2148 } else if (ic->ic_nw_keys[i].wk_len != 0) { 2149 buf[i][1] = ATW_WEP_ENABLED; 2150 } else { 2151 buf[i][1] = 0; 2152 continue; 2153 } 2154 buf[i][0] = ic->ic_nw_keys[i].wk_key[0]; 2155 memcpy(&buf[i][2], &ic->ic_nw_keys[i].wk_key[1], 2156 ic->ic_nw_keys[i].wk_len - 1); 2157 } 2158 2159 reg = ATW_READ(sc, ATW_MACTEST); 2160 reg |= ATW_MACTEST_MMI_USETXCLK | ATW_MACTEST_FORCE_KEYID; 2161 reg &= ~ATW_MACTEST_KEYID_MASK; 2162 reg |= LSHIFT(ic->ic_wep_txkey, ATW_MACTEST_KEYID_MASK); 2163 ATW_WRITE(sc, ATW_MACTEST, reg); 2164 2165 sc->sc_wepctl = ATW_WEPCTL_WEPENABLE; 2166 2167 switch (sc->sc_rev) { 2168 case ATW_REVISION_AB: 2169 case ATW_REVISION_AF: 2170 /* Bypass WEP on Rx. */ 2171 sc->sc_wepctl |= ATW_WEPCTL_WEPRXBYP; 2172 break; 2173 default: 2174 break; 2175 } 2176 2177 atw_write_sram(sc, ATW_SRAM_ADDR_SHARED_KEY, (u_int8_t*)&buf[0][0], 2178 sizeof(buf)); 2179} 2180 2181const struct timeval atw_beacon_mininterval = {.tv_sec = 1, .tv_usec = 0}; 2182 2183static void 2184atw_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2185 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2186{ 2187 struct atw_softc *sc = (struct atw_softc*)ic->ic_softc; 2188 2189 switch (subtype) { 2190 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2191 /* do nothing: hardware answers probe request */ 2192 break; 2193 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2194 case IEEE80211_FC0_SUBTYPE_BEACON: 2195 atw_recv_beacon(ic, m, ni, subtype, rssi, rstamp); 2196 break; 2197 default: 2198 (*sc->sc_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 2199 break; 2200 } 2201 return; 2202} 2203 2204static int 2205do_slow_print(struct atw_softc *sc, int *did_print) 2206{ 2207 if ((sc->sc_if.if_flags & IFF_LINK0) == 0) 2208 return 0; 2209 if (!*did_print && (sc->sc_if.if_flags & IFF_DEBUG) == 0 && 2210 !ratecheck(&sc->sc_last_beacon, &atw_beacon_mininterval)) 2211 return 0; 2212 2213 *did_print = 1; 2214 return 1; 2215} 2216 2217/* In ad hoc mode, atw_recv_beacon is responsible for the coalescence 2218 * of IBSSs with like SSID/channel but different BSSID. It joins the 2219 * oldest IBSS (i.e., with greatest TSF time), since that is the WECA 2220 * convention. Possibly the ADMtek chip does this for us; I will have 2221 * to test to find out. 2222 * 2223 * XXX we should add the duration field of the received beacon to 2224 * the TSF time it contains before comparing it with the ADM8211's 2225 * TSF. 2226 */ 2227static void 2228atw_recv_beacon(struct ieee80211com *ic, struct mbuf *m0, 2229 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2230{ 2231 struct atw_softc *sc; 2232 struct ieee80211_frame *wh; 2233 uint32_t tsftl, tsfth; 2234 uint32_t bcn_tsftl, bcn_tsfth; 2235 int did_print = 0, sign; 2236 union { 2237 uint32_t words[2]; 2238 uint8_t tstamp[8]; 2239 } u; 2240 2241 sc = (struct atw_softc*)ic->ic_if.if_softc; 2242 2243 (*sc->sc_recv_mgmt)(ic, m0, ni, subtype, rssi, rstamp); 2244 2245 if (ic->ic_state != IEEE80211_S_RUN) 2246 return; 2247 2248 atw_tsft(sc, &tsfth, &tsftl); 2249 2250 (void)memcpy(&u, &ni->ni_tstamp[0], sizeof(u)); 2251 bcn_tsftl = le32toh(u.words[0]); 2252 bcn_tsfth = le32toh(u.words[1]); 2253 2254 /* we are faster, let the other guy catch up */ 2255 if (bcn_tsfth < tsfth) 2256 sign = -1; 2257 else if (bcn_tsfth == tsfth && bcn_tsftl < tsftl) 2258 sign = -1; 2259 else 2260 sign = 1; 2261 2262 if (memcmp(ni->ni_bssid, ic->ic_bss->ni_bssid, 2263 IEEE80211_ADDR_LEN) == 0) { 2264 if (!do_slow_print(sc, &did_print)) 2265 return; 2266 printf("%s: tsft offset %s%" PRIu64 "\n", sc->sc_dev.dv_xname, 2267 (sign < 0) ? "-" : "", 2268 (sign < 0) 2269 ? ((((uint64_t)tsfth << 32) | tsftl) - 2270 (((uint64_t)bcn_tsfth << 32) | bcn_tsftl)) 2271 : ((((uint64_t)bcn_tsfth << 32) | bcn_tsftl) - 2272 (((uint64_t)tsfth << 32) | tsftl))); 2273 return; 2274 } 2275 2276 if (sign < 0) 2277 return; 2278 2279 if (ieee80211_match_bss(ic, ni) != 0) 2280 return; 2281 2282 if (do_slow_print(sc, &did_print)) { 2283 printf("%s: atw_recv_beacon: bssid mismatch %s\n", 2284 sc->sc_dev.dv_xname, ether_sprintf(ni->ni_bssid)); 2285 } 2286 2287 if (ic->ic_opmode != IEEE80211_M_IBSS) 2288 return; 2289 2290 if (do_slow_print(sc, &did_print)) { 2291 printf("%s: my tsft %" PRIu64 " beacon tsft %" PRIu64 "\n", 2292 sc->sc_dev.dv_xname, ((uint64_t)tsfth << 32) | tsftl, 2293 ((uint64_t)bcn_tsfth << 32) | bcn_tsftl); 2294 } 2295 2296 wh = mtod(m0, struct ieee80211_frame *); 2297 2298 if (do_slow_print(sc, &did_print)) { 2299 printf("%s: sync TSF with %s\n", 2300 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2301 } 2302 2303 ic->ic_flags &= ~IEEE80211_F_SIBSS; 2304 2305 (void)memcpy(&ic->ic_bss->ni_tstamp[0], &u, sizeof(u)); 2306 2307 atw_tsf(sc); 2308 2309 /* negotiate rates with new IBSS */ 2310 ieee80211_fix_rate(ic, ni, IEEE80211_F_DOFRATE | 2311 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2312 if (ni->ni_rates.rs_nrates == 0) { 2313 if (do_slow_print(sc, &did_print)) { 2314 printf("%s: rates mismatch, BSSID %s\n", 2315 sc->sc_dev.dv_xname, ether_sprintf(ni->ni_bssid)); 2316 } 2317 return; 2318 } 2319 2320 if (do_slow_print(sc, &did_print)) { 2321 printf("%s: sync BSSID %s -> ", 2322 sc->sc_dev.dv_xname, ether_sprintf(ic->ic_bss->ni_bssid)); 2323 printf("%s ", ether_sprintf(ni->ni_bssid)); 2324 printf("(from %s)\n", ether_sprintf(wh->i_addr2)); 2325 } 2326 2327 (*ic->ic_node_copy)(ic, ic->ic_bss, ni); 2328 2329 atw_write_bssid(sc); 2330 atw_start_beacon(sc, 1); 2331} 2332 2333/* Write the SSID in the ieee80211com to the SRAM on the ADM8211. 2334 * In ad hoc mode, the SSID is written to the beacons sent by the 2335 * ADM8211. In both ad hoc and infrastructure mode, beacons received 2336 * with matching SSID affect ATW_INTR_LINKON/ATW_INTR_LINKOFF 2337 * indications. 2338 */ 2339static void 2340atw_write_ssid(struct atw_softc *sc) 2341{ 2342 struct ieee80211com *ic = &sc->sc_ic; 2343 /* 34 bytes are reserved in ADM8211 SRAM for the SSID, but 2344 * it only expects the element length, not its ID. 2345 */ 2346 u_int8_t buf[roundup(1 /* length */ + IEEE80211_NWID_LEN, 2)]; 2347 2348 memset(buf, 0, sizeof(buf)); 2349 buf[0] = ic->ic_bss->ni_esslen; 2350 memcpy(&buf[1], ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen); 2351 2352 atw_write_sram(sc, ATW_SRAM_ADDR_SSID, buf, 2353 roundup(1 + ic->ic_bss->ni_esslen, 2)); 2354} 2355 2356/* Write the supported rates in the ieee80211com to the SRAM of the ADM8211. 2357 * In ad hoc mode, the supported rates are written to beacons sent by the 2358 * ADM8211. 2359 */ 2360static void 2361atw_write_sup_rates(struct atw_softc *sc) 2362{ 2363 struct ieee80211com *ic = &sc->sc_ic; 2364 /* 14 bytes are probably (XXX) reserved in the ADM8211 SRAM for 2365 * supported rates 2366 */ 2367 u_int8_t buf[roundup(1 /* length */ + IEEE80211_RATE_SIZE, 2)]; 2368 2369 memset(buf, 0, sizeof(buf)); 2370 2371 buf[0] = ic->ic_bss->ni_rates.rs_nrates; 2372 2373 memcpy(&buf[1], ic->ic_bss->ni_rates.rs_rates, 2374 ic->ic_bss->ni_rates.rs_nrates); 2375 2376 atw_write_sram(sc, ATW_SRAM_ADDR_SUPRATES, buf, sizeof(buf)); 2377} 2378 2379/* Start/stop sending beacons. */ 2380void 2381atw_start_beacon(struct atw_softc *sc, int start) 2382{ 2383 struct ieee80211com *ic = &sc->sc_ic; 2384 uint16_t chan; 2385 uint32_t bcnt, bpli, cap0, cap1, capinfo; 2386 size_t len; 2387 2388 if (ATW_IS_ENABLED(sc) == 0) 2389 return; 2390 2391 /* start beacons */ 2392 len = sizeof(struct ieee80211_frame) + 2393 8 /* timestamp */ + 2 /* beacon interval */ + 2394 2 /* capability info */ + 2395 2 + ic->ic_bss->ni_esslen /* SSID element */ + 2396 2 + ic->ic_bss->ni_rates.rs_nrates /* rates element */ + 2397 3 /* DS parameters */ + 2398 IEEE80211_CRC_LEN; 2399 2400 bcnt = ATW_READ(sc, ATW_BCNT) & ~ATW_BCNT_BCNT_MASK; 2401 cap0 = ATW_READ(sc, ATW_CAP0) & ~ATW_CAP0_CHN_MASK; 2402 cap1 = ATW_READ(sc, ATW_CAP1) & ~ATW_CAP1_CAPI_MASK; 2403 2404 ATW_WRITE(sc, ATW_BCNT, bcnt); 2405 ATW_WRITE(sc, ATW_CAP1, cap1); 2406 2407 if (!start) 2408 return; 2409 2410 /* TBD use ni_capinfo */ 2411 2412 capinfo = 0; 2413 if (sc->sc_flags & ATWF_SHORT_PREAMBLE) 2414 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2415 if (ic->ic_flags & IEEE80211_F_WEPON) 2416 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2417 2418 switch (ic->ic_opmode) { 2419 case IEEE80211_M_IBSS: 2420 len += 4; /* IBSS parameters */ 2421 capinfo |= IEEE80211_CAPINFO_IBSS; 2422 break; 2423 case IEEE80211_M_HOSTAP: 2424 /* XXX 6-byte minimum TIM */ 2425 len += atw_beacon_len_adjust; 2426 capinfo |= IEEE80211_CAPINFO_ESS; 2427 break; 2428 default: 2429 return; 2430 } 2431 2432 /* set listen interval 2433 * XXX do software units agree w/ hardware? 2434 */ 2435 bpli = LSHIFT(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2436 LSHIFT(ic->ic_lintval / ic->ic_bss->ni_intval, ATW_BPLI_LI_MASK); 2437 2438 chan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 2439 2440 bcnt |= LSHIFT(len, ATW_BCNT_BCNT_MASK); 2441 cap0 |= LSHIFT(chan, ATW_CAP0_CHN_MASK); 2442 cap1 |= LSHIFT(capinfo, ATW_CAP1_CAPI_MASK); 2443 2444 ATW_WRITE(sc, ATW_BCNT, bcnt); 2445 ATW_WRITE(sc, ATW_BPLI, bpli); 2446 ATW_WRITE(sc, ATW_CAP0, cap0); 2447 ATW_WRITE(sc, ATW_CAP1, cap1); 2448 2449 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_BCNT] = %08x\n", 2450 sc->sc_dev.dv_xname, bcnt)); 2451 2452 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_CAP1] = %08x\n", 2453 sc->sc_dev.dv_xname, cap1)); 2454} 2455 2456/* Return the 32 lsb of the last TSFT divisible by ival. */ 2457static __inline uint32_t 2458atw_last_even_tsft(uint32_t tsfth, uint32_t tsftl, uint32_t ival) 2459{ 2460 /* Following the reference driver's lead, I compute 2461 * 2462 * (uint32_t)((((uint64_t)tsfth << 32) | tsftl) % ival) 2463 * 2464 * without using 64-bit arithmetic, using the following 2465 * relationship: 2466 * 2467 * (0x100000000 * H + L) % m 2468 * = ((0x100000000 % m) * H + L) % m 2469 * = (((0xffffffff + 1) % m) * H + L) % m 2470 * = ((0xffffffff % m + 1 % m) * H + L) % m 2471 * = ((0xffffffff % m + 1) * H + L) % m 2472 */ 2473 return ((0xFFFFFFFF % ival + 1) * tsfth + tsftl) % ival; 2474} 2475 2476static __inline void 2477atw_tsft(struct atw_softc *sc, uint32_t *tsfth, uint32_t *tsftl) 2478{ 2479 int i; 2480 for (i = 0; i < 2; i++) { 2481 *tsfth = ATW_READ(sc, ATW_TSFTH); 2482 *tsftl = ATW_READ(sc, ATW_TSFTL); 2483 if (ATW_READ(sc, ATW_TSFTH) == *tsfth) 2484 break; 2485 } 2486} 2487 2488/* If we've created an IBSS, write the TSF time in the ADM8211 to 2489 * the ieee80211com. 2490 * 2491 * Predict the next target beacon transmission time (TBTT) and 2492 * write it to the ADM8211. 2493 */ 2494static void 2495atw_tsf(struct atw_softc *sc) 2496{ 2497#define TBTTOFS 20 /* TU */ 2498 2499 struct ieee80211com *ic = &sc->sc_ic; 2500 uint32_t ival, past_even, tbtt, tsfth, tsftl; 2501 union { 2502 uint32_t words[2]; 2503 uint8_t tstamp[8]; 2504 } u; 2505 2506 if ((ic->ic_opmode == IEEE80211_M_HOSTAP) || 2507 ((ic->ic_opmode == IEEE80211_M_IBSS) && 2508 (ic->ic_flags & IEEE80211_F_SIBSS))) { 2509 atw_tsft(sc, &tsfth, &tsftl); 2510 u.words[0] = htole32(tsftl); 2511 u.words[1] = htole32(tsfth); 2512 (void)memcpy(&ic->ic_bss->ni_tstamp[0], &u, 2513 sizeof(ic->ic_bss->ni_tstamp)); 2514 } else { 2515 (void)memcpy(&u, &ic->ic_bss->ni_tstamp[0], sizeof(u)); 2516 tsftl = le32toh(u.words[0]); 2517 tsfth = le32toh(u.words[1]); 2518 } 2519 2520 ival = ic->ic_bss->ni_intval * IEEE80211_DUR_TU; 2521 2522 /* We sent/received the last beacon `past' microseconds 2523 * after the interval divided the TSF timer. 2524 */ 2525 past_even = tsftl - atw_last_even_tsft(tsfth, tsftl, ival); 2526 2527 /* Skip ten beacons so that the TBTT cannot pass before 2528 * we've programmed it. Ten is an arbitrary number. 2529 */ 2530 tbtt = past_even + ival * 10; 2531 2532 ATW_WRITE(sc, ATW_TOFS1, 2533 LSHIFT(1, ATW_TOFS1_TSFTOFSR_MASK) | 2534 LSHIFT(TBTTOFS, ATW_TOFS1_TBTTOFS_MASK) | 2535 LSHIFT(MASK_AND_RSHIFT(tbtt - TBTTOFS * IEEE80211_DUR_TU, 2536 ATW_TBTTPRE_MASK), ATW_TOFS1_TBTTPRE_MASK)); 2537#undef TBTTOFS 2538} 2539 2540static void 2541atw_next_scan(void *arg) 2542{ 2543 struct atw_softc *sc = arg; 2544 struct ieee80211com *ic = &sc->sc_ic; 2545 struct ifnet *ifp = &ic->ic_if; 2546 int s; 2547 2548 /* don't call atw_start w/o network interrupts blocked */ 2549 s = splnet(); 2550 if (ic->ic_state == IEEE80211_S_SCAN) 2551 ieee80211_next_scan(ifp); 2552 splx(s); 2553} 2554 2555/* Synchronize the hardware state with the software state. */ 2556static int 2557atw_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 2558{ 2559 struct ifnet *ifp = &ic->ic_if; 2560 struct atw_softc *sc = ifp->if_softc; 2561 enum ieee80211_state ostate; 2562 int error; 2563 2564 ostate = ic->ic_state; 2565 2566 if (nstate == IEEE80211_S_INIT) { 2567 callout_stop(&sc->sc_scan_ch); 2568 sc->sc_cur_chan = IEEE80211_CHAN_ANY; 2569 atw_start_beacon(sc, 0); 2570 return (*sc->sc_newstate)(ic, nstate, arg); 2571 } 2572 2573 if ((error = atw_tune(sc)) != 0) 2574 return error; 2575 2576 switch (nstate) { 2577 case IEEE80211_S_ASSOC: 2578 break; 2579 case IEEE80211_S_INIT: 2580 panic("%s: unexpected state IEEE80211_S_INIT\n", __func__); 2581 break; 2582 case IEEE80211_S_SCAN: 2583 callout_reset(&sc->sc_scan_ch, atw_dwelltime * hz / 1000, 2584 atw_next_scan, sc); 2585 2586 break; 2587 case IEEE80211_S_RUN: 2588 if (ic->ic_opmode == IEEE80211_M_STA) 2589 break; 2590 /*FALLTHROUGH*/ 2591 case IEEE80211_S_AUTH: 2592 atw_write_bssid(sc); 2593 atw_write_ssid(sc); 2594 atw_write_sup_rates(sc); 2595 2596 if (ic->ic_opmode == IEEE80211_M_AHDEMO || 2597 ic->ic_opmode == IEEE80211_M_MONITOR) 2598 break; 2599 2600 /* set listen interval 2601 * XXX do software units agree w/ hardware? 2602 */ 2603 ATW_WRITE(sc, ATW_BPLI, 2604 LSHIFT(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2605 LSHIFT(ic->ic_lintval / ic->ic_bss->ni_intval, 2606 ATW_BPLI_LI_MASK)); 2607 2608 DPRINTF(sc, ("%s: reg[ATW_BPLI] = %08x\n", 2609 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_BPLI))); 2610 2611 atw_tsf(sc); 2612 break; 2613 } 2614 2615 if (nstate != IEEE80211_S_SCAN) 2616 callout_stop(&sc->sc_scan_ch); 2617 2618 if (nstate == IEEE80211_S_RUN && 2619 (ic->ic_opmode == IEEE80211_M_HOSTAP || 2620 ic->ic_opmode == IEEE80211_M_IBSS)) 2621 atw_start_beacon(sc, 1); 2622 else 2623 atw_start_beacon(sc, 0); 2624 2625 error = (*sc->sc_newstate)(ic, nstate, arg); 2626 2627 if (ostate == IEEE80211_S_INIT && nstate == IEEE80211_S_SCAN) 2628 atw_write_bssid(sc); 2629 2630 return error; 2631} 2632 2633/* 2634 * atw_add_rxbuf: 2635 * 2636 * Add a receive buffer to the indicated descriptor. 2637 */ 2638int 2639atw_add_rxbuf(struct atw_softc *sc, int idx) 2640{ 2641 struct atw_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2642 struct mbuf *m; 2643 int error; 2644 2645 MGETHDR(m, M_DONTWAIT, MT_DATA); 2646 if (m == NULL) 2647 return (ENOBUFS); 2648 2649 MCLGET(m, M_DONTWAIT); 2650 if ((m->m_flags & M_EXT) == 0) { 2651 m_freem(m); 2652 return (ENOBUFS); 2653 } 2654 2655 if (rxs->rxs_mbuf != NULL) 2656 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2657 2658 rxs->rxs_mbuf = m; 2659 2660 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 2661 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 2662 BUS_DMA_READ|BUS_DMA_NOWAIT); 2663 if (error) { 2664 printf("%s: can't load rx DMA map %d, error = %d\n", 2665 sc->sc_dev.dv_xname, idx, error); 2666 panic("atw_add_rxbuf"); /* XXX */ 2667 } 2668 2669 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2670 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2671 2672 ATW_INIT_RXDESC(sc, idx); 2673 2674 return (0); 2675} 2676 2677/* 2678 * Release any queued transmit buffers. 2679 */ 2680void 2681atw_txdrain(struct atw_softc *sc) 2682{ 2683 struct atw_txsoft *txs; 2684 2685 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 2686 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 2687 if (txs->txs_mbuf != NULL) { 2688 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2689 m_freem(txs->txs_mbuf); 2690 txs->txs_mbuf = NULL; 2691 } 2692 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 2693 } 2694 sc->sc_tx_timer = 0; 2695} 2696 2697/* 2698 * atw_stop: [ ifnet interface function ] 2699 * 2700 * Stop transmission on the interface. 2701 */ 2702void 2703atw_stop(struct ifnet *ifp, int disable) 2704{ 2705 struct atw_softc *sc = ifp->if_softc; 2706 struct ieee80211com *ic = &sc->sc_ic; 2707 2708 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2709 2710 /* Disable interrupts. */ 2711 ATW_WRITE(sc, ATW_IER, 0); 2712 2713 /* Stop the transmit and receive processes. */ 2714 sc->sc_opmode = 0; 2715 ATW_WRITE(sc, ATW_NAR, 0); 2716 DELAY(atw_nar_delay); 2717 ATW_WRITE(sc, ATW_TDBD, 0); 2718 ATW_WRITE(sc, ATW_TDBP, 0); 2719 ATW_WRITE(sc, ATW_RDB, 0); 2720 2721 atw_txdrain(sc); 2722 2723 if (disable) { 2724 atw_rxdrain(sc); 2725 atw_disable(sc); 2726 } 2727 2728 /* 2729 * Mark the interface down and cancel the watchdog timer. 2730 */ 2731 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2732 ifp->if_timer = 0; 2733 2734 if (!disable) 2735 atw_reset(sc); 2736} 2737 2738/* 2739 * atw_rxdrain: 2740 * 2741 * Drain the receive queue. 2742 */ 2743void 2744atw_rxdrain(struct atw_softc *sc) 2745{ 2746 struct atw_rxsoft *rxs; 2747 int i; 2748 2749 for (i = 0; i < ATW_NRXDESC; i++) { 2750 rxs = &sc->sc_rxsoft[i]; 2751 if (rxs->rxs_mbuf == NULL) 2752 continue; 2753 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2754 m_freem(rxs->rxs_mbuf); 2755 rxs->rxs_mbuf = NULL; 2756 } 2757} 2758 2759/* 2760 * atw_detach: 2761 * 2762 * Detach an ADM8211 interface. 2763 */ 2764int 2765atw_detach(struct atw_softc *sc) 2766{ 2767 struct ifnet *ifp = &sc->sc_ic.ic_if; 2768 struct atw_rxsoft *rxs; 2769 struct atw_txsoft *txs; 2770 int i; 2771 2772 /* 2773 * Succeed now if there isn't any work to do. 2774 */ 2775 if ((sc->sc_flags & ATWF_ATTACHED) == 0) 2776 return (0); 2777 2778 ieee80211_ifdetach(ifp); 2779 if_detach(ifp); 2780 2781 for (i = 0; i < ATW_NRXDESC; i++) { 2782 rxs = &sc->sc_rxsoft[i]; 2783 if (rxs->rxs_mbuf != NULL) { 2784 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2785 m_freem(rxs->rxs_mbuf); 2786 rxs->rxs_mbuf = NULL; 2787 } 2788 bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap); 2789 } 2790 for (i = 0; i < ATW_TXQUEUELEN; i++) { 2791 txs = &sc->sc_txsoft[i]; 2792 if (txs->txs_mbuf != NULL) { 2793 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2794 m_freem(txs->txs_mbuf); 2795 txs->txs_mbuf = NULL; 2796 } 2797 bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap); 2798 } 2799 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 2800 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 2801 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 2802 sizeof(struct atw_control_data)); 2803 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 2804 2805 shutdownhook_disestablish(sc->sc_sdhook); 2806 powerhook_disestablish(sc->sc_powerhook); 2807 2808 if (sc->sc_srom) 2809 free(sc->sc_srom, M_DEVBUF); 2810 2811 return (0); 2812} 2813 2814/* atw_shutdown: make sure the interface is stopped at reboot time. */ 2815void 2816atw_shutdown(void *arg) 2817{ 2818 struct atw_softc *sc = arg; 2819 2820 atw_stop(&sc->sc_ic.ic_if, 1); 2821} 2822 2823int 2824atw_intr(void *arg) 2825{ 2826 struct atw_softc *sc = arg; 2827 struct ifnet *ifp = &sc->sc_ic.ic_if; 2828 u_int32_t status, rxstatus, txstatus, linkstatus; 2829 int handled = 0, txthresh; 2830 2831#ifdef DEBUG 2832 if (ATW_IS_ENABLED(sc) == 0) 2833 panic("%s: atw_intr: not enabled", sc->sc_dev.dv_xname); 2834#endif 2835 2836 /* 2837 * If the interface isn't running, the interrupt couldn't 2838 * possibly have come from us. 2839 */ 2840 if ((ifp->if_flags & IFF_RUNNING) == 0 || 2841 (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 2842 return (0); 2843 2844 for (;;) { 2845 status = ATW_READ(sc, ATW_STSR); 2846 2847 if (status) 2848 ATW_WRITE(sc, ATW_STSR, status); 2849 2850#ifdef ATW_DEBUG 2851#define PRINTINTR(flag) do { \ 2852 if ((status & flag) != 0) { \ 2853 printf("%s" #flag, delim); \ 2854 delim = ","; \ 2855 } \ 2856} while (0) 2857 2858 if (atw_debug > 1 && status) { 2859 const char *delim = "<"; 2860 2861 printf("%s: reg[STSR] = %x", 2862 sc->sc_dev.dv_xname, status); 2863 2864 PRINTINTR(ATW_INTR_FBE); 2865 PRINTINTR(ATW_INTR_LINKOFF); 2866 PRINTINTR(ATW_INTR_LINKON); 2867 PRINTINTR(ATW_INTR_RCI); 2868 PRINTINTR(ATW_INTR_RDU); 2869 PRINTINTR(ATW_INTR_REIS); 2870 PRINTINTR(ATW_INTR_RPS); 2871 PRINTINTR(ATW_INTR_TCI); 2872 PRINTINTR(ATW_INTR_TDU); 2873 PRINTINTR(ATW_INTR_TLT); 2874 PRINTINTR(ATW_INTR_TPS); 2875 PRINTINTR(ATW_INTR_TRT); 2876 PRINTINTR(ATW_INTR_TUF); 2877 PRINTINTR(ATW_INTR_BCNTC); 2878 PRINTINTR(ATW_INTR_ATIME); 2879 PRINTINTR(ATW_INTR_TBTT); 2880 PRINTINTR(ATW_INTR_TSCZ); 2881 PRINTINTR(ATW_INTR_TSFTF); 2882 printf(">\n"); 2883 } 2884#undef PRINTINTR 2885#endif /* ATW_DEBUG */ 2886 2887 if ((status & sc->sc_inten) == 0) 2888 break; 2889 2890 handled = 1; 2891 2892 rxstatus = status & sc->sc_rxint_mask; 2893 txstatus = status & sc->sc_txint_mask; 2894 linkstatus = status & sc->sc_linkint_mask; 2895 2896 if (linkstatus) { 2897 atw_linkintr(sc, linkstatus); 2898 } 2899 2900 if (rxstatus) { 2901 /* Grab any new packets. */ 2902 atw_rxintr(sc); 2903 2904 if (rxstatus & ATW_INTR_RDU) { 2905 printf("%s: receive ring overrun\n", 2906 sc->sc_dev.dv_xname); 2907 /* Get the receive process going again. */ 2908 ATW_WRITE(sc, ATW_RDR, 0x1); 2909 break; 2910 } 2911 } 2912 2913 if (txstatus) { 2914 /* Sweep up transmit descriptors. */ 2915 atw_txintr(sc); 2916 2917 if (txstatus & ATW_INTR_TLT) 2918 DPRINTF(sc, ("%s: tx lifetime exceeded\n", 2919 sc->sc_dev.dv_xname)); 2920 2921 if (txstatus & ATW_INTR_TRT) 2922 DPRINTF(sc, ("%s: tx retry limit exceeded\n", 2923 sc->sc_dev.dv_xname)); 2924 2925 /* If Tx under-run, increase our transmit threshold 2926 * if another is available. 2927 */ 2928 txthresh = sc->sc_txthresh + 1; 2929 if ((txstatus & ATW_INTR_TUF) && 2930 sc->sc_txth[txthresh].txth_name != NULL) { 2931 /* Idle the transmit process. */ 2932 atw_idle(sc, ATW_NAR_ST); 2933 2934 sc->sc_txthresh = txthresh; 2935 sc->sc_opmode &= ~(ATW_NAR_TR_MASK|ATW_NAR_SF); 2936 sc->sc_opmode |= 2937 sc->sc_txth[txthresh].txth_opmode; 2938 printf("%s: transmit underrun; new " 2939 "threshold: %s\n", sc->sc_dev.dv_xname, 2940 sc->sc_txth[txthresh].txth_name); 2941 2942 /* Set the new threshold and restart 2943 * the transmit process. 2944 */ 2945 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2946 DELAY(atw_nar_delay); 2947 ATW_WRITE(sc, ATW_RDR, 0x1); 2948 /* XXX Log every Nth underrun from 2949 * XXX now on? 2950 */ 2951 } 2952 } 2953 2954 if (status & (ATW_INTR_TPS|ATW_INTR_RPS)) { 2955 if (status & ATW_INTR_TPS) 2956 printf("%s: transmit process stopped\n", 2957 sc->sc_dev.dv_xname); 2958 if (status & ATW_INTR_RPS) 2959 printf("%s: receive process stopped\n", 2960 sc->sc_dev.dv_xname); 2961 (void)atw_init(ifp); 2962 break; 2963 } 2964 2965 if (status & ATW_INTR_FBE) { 2966 printf("%s: fatal bus error\n", sc->sc_dev.dv_xname); 2967 (void)atw_init(ifp); 2968 break; 2969 } 2970 2971 /* 2972 * Not handled: 2973 * 2974 * Transmit buffer unavailable -- normal 2975 * condition, nothing to do, really. 2976 * 2977 * Early receive interrupt -- not available on 2978 * all chips, we just use RI. We also only 2979 * use single-segment receive DMA, so this 2980 * is mostly useless. 2981 * 2982 * TBD others 2983 */ 2984 } 2985 2986 /* Try to get more packets going. */ 2987 atw_start(ifp); 2988 2989 return (handled); 2990} 2991 2992/* 2993 * atw_idle: 2994 * 2995 * Cause the transmit and/or receive processes to go idle. 2996 * 2997 * XXX It seems that the ADM8211 will not signal the end of the Rx/Tx 2998 * process in STSR if I clear SR or ST after the process has already 2999 * ceased. Fair enough. But the Rx process status bits in ATW_TEST0 3000 * do not seem to be too reliable. Perhaps I have the sense of the 3001 * Rx bits switched with the Tx bits? 3002 */ 3003void 3004atw_idle(struct atw_softc *sc, u_int32_t bits) 3005{ 3006 u_int32_t ackmask = 0, opmode, stsr, test0; 3007 int i, s; 3008 3009 s = splnet(); 3010 3011 opmode = sc->sc_opmode & ~bits; 3012 3013 if (bits & ATW_NAR_SR) 3014 ackmask |= ATW_INTR_RPS; 3015 3016 if (bits & ATW_NAR_ST) { 3017 ackmask |= ATW_INTR_TPS; 3018 /* set ATW_NAR_HF to flush TX FIFO. */ 3019 opmode |= ATW_NAR_HF; 3020 } 3021 3022 ATW_WRITE(sc, ATW_NAR, opmode); 3023 DELAY(atw_nar_delay); 3024 3025 for (i = 0; i < 1000; i++) { 3026 stsr = ATW_READ(sc, ATW_STSR); 3027 if ((stsr & ackmask) == ackmask) 3028 break; 3029 DELAY(10); 3030 } 3031 3032 ATW_WRITE(sc, ATW_STSR, stsr & ackmask); 3033 3034 if ((stsr & ackmask) == ackmask) 3035 goto out; 3036 3037 test0 = ATW_READ(sc, ATW_TEST0); 3038 3039 if ((bits & ATW_NAR_ST) != 0 && (stsr & ATW_INTR_TPS) == 0 && 3040 (test0 & ATW_TEST0_TS_MASK) != ATW_TEST0_TS_STOPPED) { 3041 printf("%s: transmit process not idle [%s]\n", 3042 sc->sc_dev.dv_xname, 3043 atw_tx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_TS_MASK)]); 3044 printf("%s: bits %08x test0 %08x stsr %08x\n", 3045 sc->sc_dev.dv_xname, bits, test0, stsr); 3046 } 3047 3048 if ((bits & ATW_NAR_SR) != 0 && (stsr & ATW_INTR_RPS) == 0 && 3049 (test0 & ATW_TEST0_RS_MASK) != ATW_TEST0_RS_STOPPED) { 3050 DPRINTF2(sc, ("%s: receive process not idle [%s]\n", 3051 sc->sc_dev.dv_xname, 3052 atw_rx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_RS_MASK)])); 3053 DPRINTF2(sc, ("%s: bits %08x test0 %08x stsr %08x\n", 3054 sc->sc_dev.dv_xname, bits, test0, stsr)); 3055 } 3056out: 3057 if ((bits & ATW_NAR_ST) != 0) 3058 atw_txdrain(sc); 3059 splx(s); 3060 return; 3061} 3062 3063/* 3064 * atw_linkintr: 3065 * 3066 * Helper; handle link-status interrupts. 3067 */ 3068void 3069atw_linkintr(struct atw_softc *sc, u_int32_t linkstatus) 3070{ 3071 struct ieee80211com *ic = &sc->sc_ic; 3072 3073 if (ic->ic_state != IEEE80211_S_RUN) 3074 return; 3075 3076 if (linkstatus & ATW_INTR_LINKON) { 3077 DPRINTF(sc, ("%s: link on\n", sc->sc_dev.dv_xname)); 3078 sc->sc_rescan_timer = 0; 3079 } else if (linkstatus & ATW_INTR_LINKOFF) { 3080 DPRINTF(sc, ("%s: link off\n", sc->sc_dev.dv_xname)); 3081 if (ic->ic_opmode != IEEE80211_M_STA) 3082 return; 3083 sc->sc_rescan_timer = 3; 3084 ic->ic_if.if_timer = 1; 3085 } 3086} 3087 3088static __inline int 3089atw_hw_decrypted(struct atw_softc *sc, struct ieee80211_frame *wh) 3090{ 3091 if ((sc->sc_ic.ic_flags & IEEE80211_F_WEPON) == 0) 3092 return 0; 3093 if ((wh->i_fc[1] & IEEE80211_FC1_WEP) == 0) 3094 return 0; 3095 return (sc->sc_wepctl & ATW_WEPCTL_WEPRXBYP) == 0; 3096} 3097 3098/* 3099 * atw_rxintr: 3100 * 3101 * Helper; handle receive interrupts. 3102 */ 3103void 3104atw_rxintr(struct atw_softc *sc) 3105{ 3106 static int rate_tbl[] = {2, 4, 11, 22, 44}; 3107 struct ieee80211com *ic = &sc->sc_ic; 3108 struct ieee80211_node *ni; 3109 struct ieee80211_frame *wh; 3110 struct ifnet *ifp = &ic->ic_if; 3111 struct atw_rxsoft *rxs; 3112 struct mbuf *m; 3113 u_int32_t rxstat; 3114 int i, len, rate, rate0; 3115 u_int32_t rssi, rssi0; 3116 3117 for (i = sc->sc_rxptr;; i = ATW_NEXTRX(i)) { 3118 rxs = &sc->sc_rxsoft[i]; 3119 3120 ATW_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3121 3122 rxstat = le32toh(sc->sc_rxdescs[i].ar_stat); 3123 rssi0 = le32toh(sc->sc_rxdescs[i].ar_rssi); 3124 rate0 = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_RXDR_MASK); 3125 3126 if (rxstat & ATW_RXSTAT_OWN) 3127 break; /* We have processed all receive buffers. */ 3128 3129 DPRINTF3(sc, 3130 ("%s: rx stat %08x rssi0 %08x buf1 %08x buf2 %08x\n", 3131 sc->sc_dev.dv_xname, 3132 rxstat, rssi0, 3133 le32toh(sc->sc_rxdescs[i].ar_buf1), 3134 le32toh(sc->sc_rxdescs[i].ar_buf2))); 3135 3136 /* 3137 * Make sure the packet fits in one buffer. This should 3138 * always be the case. 3139 */ 3140 if ((rxstat & (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) != 3141 (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) { 3142 printf("%s: incoming packet spilled, resetting\n", 3143 sc->sc_dev.dv_xname); 3144 (void)atw_init(ifp); 3145 return; 3146 } 3147 3148 /* 3149 * If an error occurred, update stats, clear the status 3150 * word, and leave the packet buffer in place. It will 3151 * simply be reused the next time the ring comes around. 3152 * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long 3153 * error. 3154 */ 3155 3156 if ((rxstat & ATW_RXSTAT_ES) != 0 && 3157 ((sc->sc_ic.ic_ec.ec_capenable & ETHERCAP_VLAN_MTU) == 0 || 3158 (rxstat & (ATW_RXSTAT_DE | ATW_RXSTAT_SFDE | 3159 ATW_RXSTAT_SIGE | ATW_RXSTAT_CRC16E | 3160 ATW_RXSTAT_RXTOE | ATW_RXSTAT_CRC32E | 3161 ATW_RXSTAT_ICVE)) != 0)) { 3162#define PRINTERR(bit, str) \ 3163 if (rxstat & (bit)) \ 3164 printf("%s: receive error: %s\n", \ 3165 sc->sc_dev.dv_xname, str) 3166 ifp->if_ierrors++; 3167 PRINTERR(ATW_RXSTAT_DE, "descriptor error"); 3168 PRINTERR(ATW_RXSTAT_SFDE, "PLCP SFD error"); 3169 PRINTERR(ATW_RXSTAT_SIGE, "PLCP signal error"); 3170 PRINTERR(ATW_RXSTAT_CRC16E, "PLCP CRC16 error"); 3171 PRINTERR(ATW_RXSTAT_RXTOE, "time-out"); 3172 PRINTERR(ATW_RXSTAT_CRC32E, "FCS error"); 3173 PRINTERR(ATW_RXSTAT_ICVE, "WEP ICV error"); 3174#undef PRINTERR 3175 ATW_INIT_RXDESC(sc, i); 3176 continue; 3177 } 3178 3179 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3180 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 3181 3182 /* 3183 * No errors; receive the packet. Note the ADM8211 3184 * includes the CRC in promiscuous mode. 3185 */ 3186 len = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_FL_MASK); 3187 3188 /* 3189 * Allocate a new mbuf cluster. If that fails, we are 3190 * out of memory, and must drop the packet and recycle 3191 * the buffer that's already attached to this descriptor. 3192 */ 3193 m = rxs->rxs_mbuf; 3194 if (atw_add_rxbuf(sc, i) != 0) { 3195 ifp->if_ierrors++; 3196 ATW_INIT_RXDESC(sc, i); 3197 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3198 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 3199 continue; 3200 } 3201 3202 ifp->if_ipackets++; 3203 if (sc->sc_opmode & ATW_NAR_PR) 3204 m->m_flags |= M_HASFCS; 3205 m->m_pkthdr.rcvif = ifp; 3206 m->m_pkthdr.len = m->m_len = MIN(m->m_ext.ext_size, len); 3207 3208 if (rate0 >= sizeof(rate_tbl) / sizeof(rate_tbl[0])) 3209 rate = 0; 3210 else 3211 rate = rate_tbl[rate0]; 3212 3213 /* The RSSI comes straight from a register in the 3214 * baseband processor. I know that for the RF3000, 3215 * the RSSI register also contains the antenna-selection 3216 * bits. Mask those off. 3217 * 3218 * TBD Treat other basebands. 3219 */ 3220 if (sc->sc_bbptype == ATW_BBPTYPE_RFMD) 3221 rssi = rssi0 & RF3000_RSSI_MASK; 3222 else 3223 rssi = rssi0; 3224 3225 #if NBPFILTER > 0 3226 /* Pass this up to any BPF listeners. */ 3227 if (sc->sc_radiobpf != NULL) { 3228 struct atw_rx_radiotap_header *tap = &sc->sc_rxtap; 3229 3230 tap->ar_rate = rate; 3231 tap->ar_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3232 tap->ar_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3233 3234 /* TBD verify units are dB */ 3235 tap->ar_antsignal = (int)rssi; 3236 /* TBD tap->ar_flags */ 3237 3238 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3239 tap->ar_ihdr.it_len, m); 3240 } 3241 #endif /* NPBFILTER > 0 */ 3242 3243 wh = mtod(m, struct ieee80211_frame *); 3244 ni = ieee80211_find_rxnode(ic, wh); 3245 if (atw_hw_decrypted(sc, wh)) 3246 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 3247 ieee80211_input(ifp, m, ni, (int)rssi, 0); 3248 /* 3249 * The frame may have caused the node to be marked for 3250 * reclamation (e.g. in response to a DEAUTH message) 3251 * so use free_node here instead of unref_node. 3252 */ 3253 if (ni == ic->ic_bss) 3254 ieee80211_unref_node(&ni); 3255 else 3256 ieee80211_free_node(ic, ni); 3257 } 3258 3259 /* Update the receive pointer. */ 3260 sc->sc_rxptr = i; 3261} 3262 3263/* 3264 * atw_txintr: 3265 * 3266 * Helper; handle transmit interrupts. 3267 */ 3268void 3269atw_txintr(struct atw_softc *sc) 3270{ 3271#define TXSTAT_ERRMASK (ATW_TXSTAT_TUF | ATW_TXSTAT_TLT | ATW_TXSTAT_TRT | \ 3272 ATW_TXSTAT_TRO | ATW_TXSTAT_SOFBR) 3273#define TXSTAT_FMT "\20\31ATW_TXSTAT_SOFBR\32ATW_TXSTAT_TRO\33ATW_TXSTAT_TUF" \ 3274 "\34ATW_TXSTAT_TRT\35ATW_TXSTAT_TLT" 3275 3276 static char txstat_buf[sizeof("ffffffff<>" TXSTAT_FMT)]; 3277 struct ifnet *ifp = &sc->sc_ic.ic_if; 3278 struct atw_txsoft *txs; 3279 u_int32_t txstat; 3280 3281 DPRINTF3(sc, ("%s: atw_txintr: sc_flags 0x%08x\n", 3282 sc->sc_dev.dv_xname, sc->sc_flags)); 3283 3284 ifp->if_flags &= ~IFF_OACTIVE; 3285 3286 /* 3287 * Go through our Tx list and free mbufs for those 3288 * frames that have been transmitted. 3289 */ 3290 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 3291 ATW_CDTXSYNC(sc, txs->txs_lastdesc, 1, 3292 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3293 3294#ifdef ATW_DEBUG 3295 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3296 int i; 3297 printf(" txsoft %p transmit chain:\n", txs); 3298 ATW_CDTXSYNC(sc, txs->txs_firstdesc, 3299 txs->txs_ndescs - 1, 3300 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3301 for (i = txs->txs_firstdesc;; i = ATW_NEXTTX(i)) { 3302 printf(" descriptor %d:\n", i); 3303 printf(" at_status: 0x%08x\n", 3304 le32toh(sc->sc_txdescs[i].at_stat)); 3305 printf(" at_flags: 0x%08x\n", 3306 le32toh(sc->sc_txdescs[i].at_flags)); 3307 printf(" at_buf1: 0x%08x\n", 3308 le32toh(sc->sc_txdescs[i].at_buf1)); 3309 printf(" at_buf2: 0x%08x\n", 3310 le32toh(sc->sc_txdescs[i].at_buf2)); 3311 if (i == txs->txs_lastdesc) 3312 break; 3313 } 3314 } 3315#endif 3316 3317 txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].at_stat); 3318 if (txstat & ATW_TXSTAT_OWN) 3319 break; 3320 3321 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 3322 3323 sc->sc_txfree += txs->txs_ndescs; 3324 3325 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 3326 0, txs->txs_dmamap->dm_mapsize, 3327 BUS_DMASYNC_POSTWRITE); 3328 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 3329 m_freem(txs->txs_mbuf); 3330 txs->txs_mbuf = NULL; 3331 3332 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 3333 3334 if ((ifp->if_flags & IFF_DEBUG) != 0 && 3335 (txstat & TXSTAT_ERRMASK) != 0) { 3336 bitmask_snprintf(txstat & TXSTAT_ERRMASK, TXSTAT_FMT, 3337 txstat_buf, sizeof(txstat_buf)); 3338 printf("%s: txstat %s %d\n", sc->sc_dev.dv_xname, 3339 txstat_buf, 3340 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK)); 3341 } 3342 3343 /* 3344 * Check for errors and collisions. 3345 */ 3346 if (txstat & ATW_TXSTAT_TUF) 3347 sc->sc_stats.ts_tx_tuf++; 3348 if (txstat & ATW_TXSTAT_TLT) 3349 sc->sc_stats.ts_tx_tlt++; 3350 if (txstat & ATW_TXSTAT_TRT) 3351 sc->sc_stats.ts_tx_trt++; 3352 if (txstat & ATW_TXSTAT_TRO) 3353 sc->sc_stats.ts_tx_tro++; 3354 if (txstat & ATW_TXSTAT_SOFBR) { 3355 sc->sc_stats.ts_tx_sofbr++; 3356 } 3357 3358 if ((txstat & ATW_TXSTAT_ES) == 0) 3359 ifp->if_collisions += 3360 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK); 3361 else 3362 ifp->if_oerrors++; 3363 3364 ifp->if_opackets++; 3365 } 3366 3367 /* 3368 * If there are no more pending transmissions, cancel the watchdog 3369 * timer. 3370 */ 3371 if (txs == NULL) 3372 sc->sc_tx_timer = 0; 3373#undef TXSTAT_ERRMASK 3374#undef TXSTAT_FMT 3375} 3376 3377/* 3378 * atw_watchdog: [ifnet interface function] 3379 * 3380 * Watchdog timer handler. 3381 */ 3382void 3383atw_watchdog(struct ifnet *ifp) 3384{ 3385 struct atw_softc *sc = ifp->if_softc; 3386 struct ieee80211com *ic = &sc->sc_ic; 3387 3388 ifp->if_timer = 0; 3389 if (ATW_IS_ENABLED(sc) == 0) 3390 return; 3391 3392 if (sc->sc_rescan_timer) { 3393 if (--sc->sc_rescan_timer == 0) 3394 (void)ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3395 } 3396 if (sc->sc_tx_timer) { 3397 if (--sc->sc_tx_timer == 0 && 3398 !SIMPLEQ_EMPTY(&sc->sc_txdirtyq)) { 3399 printf("%s: transmit timeout\n", ifp->if_xname); 3400 ifp->if_oerrors++; 3401 (void)atw_init(ifp); 3402 atw_start(ifp); 3403 } 3404 } 3405 if (sc->sc_tx_timer != 0 || sc->sc_rescan_timer != 0) 3406 ifp->if_timer = 1; 3407 ieee80211_watchdog(ifp); 3408} 3409 3410/* Compute the 802.11 Duration field and the PLCP Length fields for 3411 * a len-byte frame (HEADER + PAYLOAD + FCS) sent at rate * 500Kbps. 3412 * Write the fields to the ADM8211 Tx header, frm. 3413 * 3414 * TBD use the fragmentation threshold to find the right duration for 3415 * the first & last fragments. 3416 * 3417 * TBD make certain of the duration fields applied by the ADM8211 to each 3418 * fragment. I think that the ADM8211 knows how to subtract the CTS 3419 * duration when ATW_HDRCTL_RTSCTS is clear; that is why I add it regardless. 3420 * I also think that the ADM8211 does *some* arithmetic for us, because 3421 * otherwise I think we would have to set a first duration for CTS/first 3422 * fragment, a second duration for fragments between the first and the 3423 * last, and a third duration for the last fragment. 3424 * 3425 * TBD make certain that duration fields reflect addition of FCS/WEP 3426 * and correct duration arithmetic as necessary. 3427 */ 3428static void 3429atw_frame_setdurs(struct atw_softc *sc, struct atw_frame *frm, int rate, 3430 int len) 3431{ 3432 int remainder; 3433 3434 /* deal also with encrypted fragments */ 3435 if (frm->atw_hdrctl & htole16(ATW_HDRCTL_WEP)) { 3436 DPRINTF2(sc, ("%s: atw_frame_setdurs len += 8\n", 3437 sc->sc_dev.dv_xname)); 3438 len += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + 3439 IEEE80211_WEP_CRCLEN; 3440 } 3441 3442 /* 802.11 Duration Field for CTS/Data/ACK sequence minus FCS & WEP 3443 * duration (XXX added by MAC?). 3444 */ 3445 frm->atw_head_dur = (16 * (len - IEEE80211_CRC_LEN)) / rate; 3446 remainder = (16 * (len - IEEE80211_CRC_LEN)) % rate; 3447 3448 if (rate <= 4) 3449 /* 1-2Mbps WLAN: send ACK/CTS at 1Mbps */ 3450 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3451 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3452 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3453 IEEE80211_DUR_DS_SLOW_CTS + IEEE80211_DUR_DS_SLOW_ACK; 3454 else 3455 /* 5-11Mbps WLAN: send ACK/CTS at 2Mbps */ 3456 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3457 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3458 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3459 IEEE80211_DUR_DS_FAST_CTS + IEEE80211_DUR_DS_FAST_ACK; 3460 3461 /* lengthen duration if long preamble */ 3462 if ((sc->sc_flags & ATWF_SHORT_PREAMBLE) == 0) 3463 frm->atw_head_dur += 3464 3 * (IEEE80211_DUR_DS_LONG_PREAMBLE - 3465 IEEE80211_DUR_DS_SHORT_PREAMBLE) + 3466 3 * (IEEE80211_DUR_DS_SLOW_PLCPHDR - 3467 IEEE80211_DUR_DS_FAST_PLCPHDR); 3468 3469 if (remainder != 0) 3470 frm->atw_head_dur++; 3471 3472 if ((atw_voodoo & VOODOO_DUR_2_4_SPECIALCASE) && 3473 (rate == 2 || rate == 4)) { 3474 /* derived from Linux: how could this be right? */ 3475 frm->atw_head_plcplen = frm->atw_head_dur; 3476 } else { 3477 frm->atw_head_plcplen = (16 * len) / rate; 3478 remainder = (80 * len) % (rate * 5); 3479 3480 if (remainder != 0) { 3481 frm->atw_head_plcplen++; 3482 3483 /* XXX magic */ 3484 if ((atw_voodoo & VOODOO_DUR_11_ROUNDING) && 3485 rate == 22 && remainder <= 30) 3486 frm->atw_head_plcplen |= 0x8000; 3487 } 3488 } 3489 frm->atw_tail_plcplen = frm->atw_head_plcplen = 3490 htole16(frm->atw_head_plcplen); 3491 frm->atw_tail_dur = frm->atw_head_dur = htole16(frm->atw_head_dur); 3492} 3493 3494#ifdef ATW_DEBUG 3495static void 3496atw_dump_pkt(struct ifnet *ifp, struct mbuf *m0) 3497{ 3498 struct atw_softc *sc = ifp->if_softc; 3499 struct mbuf *m; 3500 int i, noctets = 0; 3501 3502 printf("%s: %d-byte packet\n", sc->sc_dev.dv_xname, 3503 m0->m_pkthdr.len); 3504 3505 for (m = m0; m; m = m->m_next) { 3506 if (m->m_len == 0) 3507 continue; 3508 for (i = 0; i < m->m_len; i++) { 3509 printf(" %02x", ((u_int8_t*)m->m_data)[i]); 3510 if (++noctets % 24 == 0) 3511 printf("\n"); 3512 } 3513 } 3514 printf("%s%s: %d bytes emitted\n", 3515 (noctets % 24 != 0) ? "\n" : "", sc->sc_dev.dv_xname, noctets); 3516} 3517#endif /* ATW_DEBUG */ 3518 3519/* 3520 * atw_start: [ifnet interface function] 3521 * 3522 * Start packet transmission on the interface. 3523 */ 3524void 3525atw_start(struct ifnet *ifp) 3526{ 3527 struct atw_softc *sc = ifp->if_softc; 3528 struct ieee80211com *ic = &sc->sc_ic; 3529 struct ieee80211_node *ni; 3530 struct ieee80211_frame *wh; 3531 struct atw_frame *hh; 3532 struct mbuf *m0, *m; 3533 struct atw_txsoft *txs, *last_txs; 3534 struct atw_txdesc *txd; 3535 int do_encrypt, rate; 3536 bus_dmamap_t dmamap; 3537 int ctl, error, firsttx, nexttx, lasttx = -1, first, ofree, seg; 3538 3539 DPRINTF2(sc, ("%s: atw_start: sc_flags 0x%08x, if_flags 0x%08x\n", 3540 sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags)); 3541 3542 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 3543 return; 3544 3545 /* 3546 * Remember the previous number of free descriptors and 3547 * the first descriptor we'll use. 3548 */ 3549 ofree = sc->sc_txfree; 3550 firsttx = sc->sc_txnext; 3551 3552 DPRINTF2(sc, ("%s: atw_start: txfree %d, txnext %d\n", 3553 sc->sc_dev.dv_xname, ofree, firsttx)); 3554 3555 /* 3556 * Loop through the send queue, setting up transmit descriptors 3557 * until we drain the queue, or use up all available transmit 3558 * descriptors. 3559 */ 3560 while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && 3561 sc->sc_txfree != 0) { 3562 3563 /* 3564 * Grab a packet off the management queue, if it 3565 * is not empty. Otherwise, from the data queue. 3566 */ 3567 IF_DEQUEUE(&ic->ic_mgtq, m0); 3568 if (m0 != NULL) { 3569 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 3570 m0->m_pkthdr.rcvif = NULL; 3571 } else { 3572 /* send no data packets until we are associated */ 3573 if (ic->ic_state != IEEE80211_S_RUN) 3574 break; 3575 IFQ_DEQUEUE(&ifp->if_snd, m0); 3576 if (m0 == NULL) 3577 break; 3578#if NBPFILTER > 0 3579 if (ifp->if_bpf != NULL) 3580 bpf_mtap(ifp->if_bpf, m0); 3581#endif /* NBPFILTER > 0 */ 3582 if ((m0 = ieee80211_encap(ifp, m0, &ni)) == NULL) { 3583 ifp->if_oerrors++; 3584 break; 3585 } 3586 } 3587 3588 rate = MAX(ieee80211_get_rate(ic), 2); 3589 3590#if NBPFILTER > 0 3591 /* 3592 * Pass the packet to any BPF listeners. 3593 */ 3594 if (ic->ic_rawbpf != NULL) 3595 bpf_mtap((caddr_t)ic->ic_rawbpf, m0); 3596 3597 if (sc->sc_radiobpf != NULL) { 3598 struct atw_tx_radiotap_header *tap = &sc->sc_txtap; 3599 3600 tap->at_rate = rate; 3601 tap->at_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3602 tap->at_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3603 3604 /* TBD tap->at_flags */ 3605 3606 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3607 tap->at_ihdr.it_len, m0); 3608 } 3609#endif /* NBPFILTER > 0 */ 3610 3611 M_PREPEND(m0, offsetof(struct atw_frame, atw_ihdr), M_DONTWAIT); 3612 3613 if (ni != NULL && ni != ic->ic_bss) 3614 ieee80211_free_node(ic, ni); 3615 3616 if (m0 == NULL) { 3617 ifp->if_oerrors++; 3618 break; 3619 } 3620 3621 /* just to make sure. */ 3622 m0 = m_pullup(m0, sizeof(struct atw_frame)); 3623 3624 if (m0 == NULL) { 3625 ifp->if_oerrors++; 3626 break; 3627 } 3628 3629 hh = mtod(m0, struct atw_frame *); 3630 wh = &hh->atw_ihdr; 3631 3632 do_encrypt = ((wh->i_fc[1] & IEEE80211_FC1_WEP) != 0) ? 1 : 0; 3633 3634 /* Copy everything we need from the 802.11 header: 3635 * Frame Control; address 1, address 3, or addresses 3636 * 3 and 4. NIC fills in BSSID, SA. 3637 */ 3638 if (wh->i_fc[1] & IEEE80211_FC1_DIR_TODS) { 3639 if (wh->i_fc[1] & IEEE80211_FC1_DIR_FROMDS) 3640 panic("%s: illegal WDS frame", 3641 sc->sc_dev.dv_xname); 3642 memcpy(hh->atw_dst, wh->i_addr3, IEEE80211_ADDR_LEN); 3643 } else 3644 memcpy(hh->atw_dst, wh->i_addr1, IEEE80211_ADDR_LEN); 3645 3646 *(u_int16_t*)hh->atw_fc = *(u_int16_t*)wh->i_fc; 3647 3648 /* initialize remaining Tx parameters */ 3649 memset(&hh->u, 0, sizeof(hh->u)); 3650 3651 hh->atw_rate = rate * 5; 3652 /* XXX this could be incorrect if M_FCS. _encap should 3653 * probably strip FCS just in case it sticks around in 3654 * bridged packets. 3655 */ 3656 hh->atw_service = IEEE80211_PLCP_SERVICE; /* XXX guess */ 3657 hh->atw_paylen = htole16(m0->m_pkthdr.len - 3658 sizeof(struct atw_frame)); 3659 3660 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3661 hh->atw_rtylmt = 3; 3662 hh->atw_hdrctl = htole16(ATW_HDRCTL_UNKNOWN1); 3663 if (do_encrypt) { 3664 hh->atw_hdrctl |= htole16(ATW_HDRCTL_WEP); 3665 hh->atw_keyid = ic->ic_wep_txkey; 3666 } 3667 3668 /* TBD 4-addr frames */ 3669 atw_frame_setdurs(sc, hh, rate, 3670 m0->m_pkthdr.len - sizeof(struct atw_frame) + 3671 sizeof(struct ieee80211_frame) + IEEE80211_CRC_LEN); 3672 3673 /* never fragment multicast frames */ 3674 if (IEEE80211_IS_MULTICAST(hh->atw_dst)) { 3675 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3676 } else if (sc->sc_flags & ATWF_RTSCTS) { 3677 hh->atw_hdrctl |= htole16(ATW_HDRCTL_RTSCTS); 3678 } 3679 3680#ifdef ATW_DEBUG 3681 hh->atw_fragnum = 0; 3682 3683 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3684 printf("%s: dst = %s, rate = 0x%02x, " 3685 "service = 0x%02x, paylen = 0x%04x\n", 3686 sc->sc_dev.dv_xname, ether_sprintf(hh->atw_dst), 3687 hh->atw_rate, hh->atw_service, hh->atw_paylen); 3688 3689 printf("%s: fc[0] = 0x%02x, fc[1] = 0x%02x, " 3690 "dur1 = 0x%04x, dur2 = 0x%04x, " 3691 "dur3 = 0x%04x, rts_dur = 0x%04x\n", 3692 sc->sc_dev.dv_xname, hh->atw_fc[0], hh->atw_fc[1], 3693 hh->atw_tail_plcplen, hh->atw_head_plcplen, 3694 hh->atw_tail_dur, hh->atw_head_dur); 3695 3696 printf("%s: hdrctl = 0x%04x, fragthr = 0x%04x, " 3697 "fragnum = 0x%02x, rtylmt = 0x%04x\n", 3698 sc->sc_dev.dv_xname, hh->atw_hdrctl, 3699 hh->atw_fragthr, hh->atw_fragnum, hh->atw_rtylmt); 3700 3701 printf("%s: keyid = %d\n", 3702 sc->sc_dev.dv_xname, hh->atw_keyid); 3703 3704 atw_dump_pkt(ifp, m0); 3705 } 3706#endif /* ATW_DEBUG */ 3707 3708 dmamap = txs->txs_dmamap; 3709 3710 /* 3711 * Load the DMA map. Copy and try (once) again if the packet 3712 * didn't fit in the alloted number of segments. 3713 */ 3714 for (first = 1; 3715 (error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 3716 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 && first; 3717 first = 0) { 3718 MGETHDR(m, M_DONTWAIT, MT_DATA); 3719 if (m == NULL) { 3720 printf("%s: unable to allocate Tx mbuf\n", 3721 sc->sc_dev.dv_xname); 3722 break; 3723 } 3724 if (m0->m_pkthdr.len > MHLEN) { 3725 MCLGET(m, M_DONTWAIT); 3726 if ((m->m_flags & M_EXT) == 0) { 3727 printf("%s: unable to allocate Tx " 3728 "cluster\n", sc->sc_dev.dv_xname); 3729 m_freem(m); 3730 break; 3731 } 3732 } 3733 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 3734 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 3735 m_freem(m0); 3736 m0 = m; 3737 m = NULL; 3738 } 3739 if (error != 0) { 3740 printf("%s: unable to load Tx buffer, " 3741 "error = %d\n", sc->sc_dev.dv_xname, error); 3742 m_freem(m0); 3743 break; 3744 } 3745 3746 /* 3747 * Ensure we have enough descriptors free to describe 3748 * the packet. 3749 */ 3750 if (dmamap->dm_nsegs > sc->sc_txfree) { 3751 /* 3752 * Not enough free descriptors to transmit 3753 * this packet. Unload the DMA map and 3754 * drop the packet. Notify the upper layer 3755 * that there are no more slots left. 3756 * 3757 * XXX We could allocate an mbuf and copy, but 3758 * XXX it is worth it? 3759 */ 3760 ifp->if_flags |= IFF_OACTIVE; 3761 bus_dmamap_unload(sc->sc_dmat, dmamap); 3762 m_freem(m0); 3763 break; 3764 } 3765 3766 /* 3767 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 3768 */ 3769 3770 /* Sync the DMA map. */ 3771 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 3772 BUS_DMASYNC_PREWRITE); 3773 3774 /* XXX arbitrary retry limit; 8 because I have seen it in 3775 * use already and maybe 0 means "no tries" ! 3776 */ 3777 ctl = htole32(LSHIFT(8, ATW_TXCTL_TL_MASK)); 3778 3779 DPRINTF2(sc, ("%s: TXDR <- max(10, %d)\n", 3780 sc->sc_dev.dv_xname, rate * 5)); 3781 ctl |= htole32(LSHIFT(MAX(10, rate * 5), ATW_TXCTL_TXDR_MASK)); 3782 3783 /* 3784 * Initialize the transmit descriptors. 3785 */ 3786 for (nexttx = sc->sc_txnext, seg = 0; 3787 seg < dmamap->dm_nsegs; 3788 seg++, nexttx = ATW_NEXTTX(nexttx)) { 3789 /* 3790 * If this is the first descriptor we're 3791 * enqueueing, don't set the OWN bit just 3792 * yet. That could cause a race condition. 3793 * We'll do it below. 3794 */ 3795 txd = &sc->sc_txdescs[nexttx]; 3796 txd->at_ctl = ctl | 3797 ((nexttx == firsttx) ? 0 : htole32(ATW_TXCTL_OWN)); 3798 3799 txd->at_buf1 = htole32(dmamap->dm_segs[seg].ds_addr); 3800 txd->at_flags = 3801 htole32(LSHIFT(dmamap->dm_segs[seg].ds_len, 3802 ATW_TXFLAG_TBS1_MASK)) | 3803 ((nexttx == (ATW_NTXDESC - 1)) 3804 ? htole32(ATW_TXFLAG_TER) : 0); 3805 lasttx = nexttx; 3806 } 3807 3808 IASSERT(lasttx != -1, ("bad lastx")); 3809 /* Set `first segment' and `last segment' appropriately. */ 3810 sc->sc_txdescs[sc->sc_txnext].at_flags |= 3811 htole32(ATW_TXFLAG_FS); 3812 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_LS); 3813 3814#ifdef ATW_DEBUG 3815 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3816 printf(" txsoft %p transmit chain:\n", txs); 3817 for (seg = sc->sc_txnext;; seg = ATW_NEXTTX(seg)) { 3818 printf(" descriptor %d:\n", seg); 3819 printf(" at_ctl: 0x%08x\n", 3820 le32toh(sc->sc_txdescs[seg].at_ctl)); 3821 printf(" at_flags: 0x%08x\n", 3822 le32toh(sc->sc_txdescs[seg].at_flags)); 3823 printf(" at_buf1: 0x%08x\n", 3824 le32toh(sc->sc_txdescs[seg].at_buf1)); 3825 printf(" at_buf2: 0x%08x\n", 3826 le32toh(sc->sc_txdescs[seg].at_buf2)); 3827 if (seg == lasttx) 3828 break; 3829 } 3830 } 3831#endif 3832 3833 /* Sync the descriptors we're using. */ 3834 ATW_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 3835 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3836 3837 /* 3838 * Store a pointer to the packet so we can free it later, 3839 * and remember what txdirty will be once the packet is 3840 * done. 3841 */ 3842 txs->txs_mbuf = m0; 3843 txs->txs_firstdesc = sc->sc_txnext; 3844 txs->txs_lastdesc = lasttx; 3845 txs->txs_ndescs = dmamap->dm_nsegs; 3846 3847 /* Advance the tx pointer. */ 3848 sc->sc_txfree -= dmamap->dm_nsegs; 3849 sc->sc_txnext = nexttx; 3850 3851 SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 3852 SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 3853 3854 last_txs = txs; 3855 } 3856 3857 if (txs == NULL || sc->sc_txfree == 0) { 3858 /* No more slots left; notify upper layer. */ 3859 ifp->if_flags |= IFF_OACTIVE; 3860 } 3861 3862 if (sc->sc_txfree != ofree) { 3863 DPRINTF2(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", 3864 sc->sc_dev.dv_xname, lasttx, firsttx)); 3865 /* 3866 * Cause a transmit interrupt to happen on the 3867 * last packet we enqueued. 3868 */ 3869 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_IC); 3870 ATW_CDTXSYNC(sc, lasttx, 1, 3871 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3872 3873 /* 3874 * The entire packet chain is set up. Give the 3875 * first descriptor to the chip now. 3876 */ 3877 sc->sc_txdescs[firsttx].at_ctl |= htole32(ATW_TXCTL_OWN); 3878 ATW_CDTXSYNC(sc, firsttx, 1, 3879 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3880 3881 /* Wake up the transmitter. */ 3882 ATW_WRITE(sc, ATW_TDR, 0x1); 3883 3884 /* Set a watchdog timer in case the chip flakes out. */ 3885 sc->sc_tx_timer = 5; 3886 ifp->if_timer = 1; 3887 } 3888} 3889 3890/* 3891 * atw_power: 3892 * 3893 * Power management (suspend/resume) hook. 3894 */ 3895void 3896atw_power(int why, void *arg) 3897{ 3898 struct atw_softc *sc = arg; 3899 struct ifnet *ifp = &sc->sc_ic.ic_if; 3900 int s; 3901 3902 DPRINTF(sc, ("%s: atw_power(%d,)\n", sc->sc_dev.dv_xname, why)); 3903 3904 s = splnet(); 3905 switch (why) { 3906 case PWR_STANDBY: 3907 /* XXX do nothing. */ 3908 break; 3909 case PWR_SUSPEND: 3910 atw_stop(ifp, 0); 3911 if (sc->sc_power != NULL) 3912 (*sc->sc_power)(sc, why); 3913 break; 3914 case PWR_RESUME: 3915 if (ifp->if_flags & IFF_UP) { 3916 if (sc->sc_power != NULL) 3917 (*sc->sc_power)(sc, why); 3918 atw_init(ifp); 3919 } 3920 break; 3921 case PWR_SOFTSUSPEND: 3922 case PWR_SOFTSTANDBY: 3923 case PWR_SOFTRESUME: 3924 break; 3925 } 3926 splx(s); 3927} 3928 3929/* 3930 * atw_ioctl: [ifnet interface function] 3931 * 3932 * Handle control requests from the operator. 3933 */ 3934int 3935atw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 3936{ 3937 struct atw_softc *sc = ifp->if_softc; 3938 struct ifreq *ifr = (struct ifreq *)data; 3939 int s, error = 0; 3940 3941 /* XXX monkey see, monkey do. comes from wi_ioctl. */ 3942 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 3943 return ENXIO; 3944 3945 s = splnet(); 3946 3947 switch (cmd) { 3948 case SIOCSIFFLAGS: 3949 if (ifp->if_flags & IFF_UP) { 3950 if (ATW_IS_ENABLED(sc)) { 3951 /* 3952 * To avoid rescanning another access point, 3953 * do not call atw_init() here. Instead, 3954 * only reflect media settings. 3955 */ 3956 atw_filter_setup(sc); 3957 } else 3958 error = atw_init(ifp); 3959 } else if (ATW_IS_ENABLED(sc)) 3960 atw_stop(ifp, 1); 3961 break; 3962 case SIOCADDMULTI: 3963 case SIOCDELMULTI: 3964 error = (cmd == SIOCADDMULTI) ? 3965 ether_addmulti(ifr, &sc->sc_ic.ic_ec) : 3966 ether_delmulti(ifr, &sc->sc_ic.ic_ec); 3967 if (error == ENETRESET) { 3968 if (ATW_IS_ENABLED(sc)) 3969 atw_filter_setup(sc); /* do not rescan */ 3970 error = 0; 3971 } 3972 break; 3973 default: 3974 error = ieee80211_ioctl(ifp, cmd, data); 3975 if (error == ENETRESET) { 3976 if (ATW_IS_ENABLED(sc)) 3977 error = atw_init(ifp); 3978 else 3979 error = 0; 3980 } 3981 break; 3982 } 3983 3984 /* Try to get more packets going. */ 3985 if (ATW_IS_ENABLED(sc)) 3986 atw_start(ifp); 3987 3988 splx(s); 3989 return (error); 3990} 3991 3992static int 3993atw_media_change(struct ifnet *ifp) 3994{ 3995 int error; 3996 3997 error = ieee80211_media_change(ifp); 3998 if (error == ENETRESET) { 3999 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == 4000 (IFF_RUNNING|IFF_UP)) 4001 atw_init(ifp); /* XXX lose error */ 4002 error = 0; 4003 } 4004 return error; 4005} 4006 4007static void 4008atw_media_status(struct ifnet *ifp, struct ifmediareq *imr) 4009{ 4010 struct atw_softc *sc = ifp->if_softc; 4011 4012 if (ATW_IS_ENABLED(sc) == 0) { 4013 imr->ifm_active = IFM_IEEE80211 | IFM_NONE; 4014 imr->ifm_status = 0; 4015 return; 4016 } 4017 ieee80211_media_status(ifp, imr); 4018} 4019