atw.c revision 1.21
1 /* $NetBSD: atw.c,v 1.21 2004/01/29 10:01:14 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 1.21 2004/01/29 10:01:14 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/atwvar.h> 82 #include <dev/ic/smc93cx6var.h> 83 84 /* XXX TBD open questions 85 * 86 * 87 * When should I set DSSS PAD in reg 0x15 of RF3000? In 1-2Mbps 88 * modes only, or all modes (5.5-11 Mbps CCK modes, too?) Does the MAC 89 * handle this for me? 90 * 91 */ 92 /* device attachment 93 * 94 * print TOFS[012] 95 * 96 * device initialization 97 * 98 * clear ATW_FRCTL_MAXPSP to disable max power saving 99 * set ATW_TXBR_ALCUPDATE to enable ALC 100 * set TOFS[012]? (hope not) 101 * disable rx/tx 102 * set ATW_PAR_SWR (software reset) 103 * wait for ATW_PAR_SWR clear 104 * disable interrupts 105 * ack status register 106 * enable interrupts 107 * 108 * rx/tx initialization 109 * 110 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 111 * allocate and init descriptor rings 112 * write ATW_PAR_DSL (descriptor skip length) 113 * write descriptor base addrs: ATW_TDBD, ATW_TDBP, write ATW_RDB 114 * write ATW_NAR_SQ for one/both transmit descriptor rings 115 * write ATW_NAR_SQ for one/both transmit descriptor rings 116 * enable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 117 * 118 * rx/tx end 119 * 120 * stop DMA 121 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 122 * flush tx w/ ATW_NAR_HF 123 * 124 * scan 125 * 126 * initialize rx/tx 127 * 128 * IBSS join/create 129 * 130 * set ATW_NAR_EA (is set by ASIC?) 131 * 132 * BSS join: (re)association response 133 * 134 * set ATW_FRCTL_AID 135 * 136 * optimizations ??? 137 * 138 */ 139 140 #define VOODOO_DUR_11_ROUNDING 0x01 /* necessary */ 141 #define VOODOO_DUR_2_4_SPECIALCASE 0x02 /* NOT necessary */ 142 int atw_voodoo = VOODOO_DUR_11_ROUNDING; 143 144 int atw_rfio_enable_delay = 20 * 1000; 145 int atw_rfio_disable_delay = 2 * 1000; 146 int atw_writewep_delay = 5; 147 int atw_beacon_len_adjust = 4; 148 int atw_dwelltime = 200; 149 150 #ifdef ATW_DEBUG 151 int atw_xhdrctl = 0; 152 int atw_xrtylmt = ~0; 153 int atw_xservice = IEEE80211_PLCP_SERVICE; 154 int atw_xpaylen = 0; 155 156 int atw_debug = 0; 157 158 #define ATW_DPRINTF(x) if (atw_debug > 0) printf x 159 #define ATW_DPRINTF2(x) if (atw_debug > 1) printf x 160 #define ATW_DPRINTF3(x) if (atw_debug > 2) printf x 161 #define DPRINTF(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) printf x 162 #define DPRINTF2(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF2(x) 163 #define DPRINTF3(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF3(x) 164 static void atw_print_regs(struct atw_softc *, const char *); 165 static void atw_rf3000_print(struct atw_softc *); 166 static void atw_si4126_print(struct atw_softc *); 167 static void atw_dump_pkt(struct ifnet *, struct mbuf *); 168 #else 169 #define ATW_DPRINTF(x) 170 #define ATW_DPRINTF2(x) 171 #define ATW_DPRINTF3(x) 172 #define DPRINTF(sc, x) /* nothing */ 173 #define DPRINTF2(sc, x) /* nothing */ 174 #define DPRINTF3(sc, x) /* nothing */ 175 #endif 176 177 #ifdef ATW_STATS 178 void atw_print_stats __P((struct atw_softc *)); 179 #endif 180 181 void atw_start __P((struct ifnet *)); 182 void atw_watchdog __P((struct ifnet *)); 183 int atw_ioctl __P((struct ifnet *, u_long, caddr_t)); 184 int atw_init __P((struct ifnet *)); 185 void atw_stop __P((struct ifnet *, int)); 186 187 void atw_reset __P((struct atw_softc *)); 188 int atw_read_srom __P((struct atw_softc *)); 189 190 void atw_shutdown __P((void *)); 191 192 void atw_rxdrain __P((struct atw_softc *)); 193 int atw_add_rxbuf __P((struct atw_softc *, int)); 194 void atw_idle __P((struct atw_softc *, u_int32_t)); 195 196 int atw_enable __P((struct atw_softc *)); 197 void atw_disable __P((struct atw_softc *)); 198 void atw_power __P((int, void *)); 199 200 void atw_rxintr __P((struct atw_softc *)); 201 void atw_txintr __P((struct atw_softc *)); 202 void atw_linkintr __P((struct atw_softc *, u_int32_t)); 203 204 static int atw_newstate(struct ieee80211com *, enum ieee80211_state, int); 205 static void atw_tsf(struct atw_softc *); 206 static void atw_start_beacon(struct atw_softc *, int); 207 static void atw_write_wep(struct atw_softc *); 208 static void atw_write_bssid(struct atw_softc *); 209 static void atw_write_bcn_thresh(struct atw_softc *); 210 static void atw_write_ssid(struct atw_softc *); 211 static void atw_write_sup_rates(struct atw_softc *); 212 static void atw_clear_sram(struct atw_softc *); 213 static void atw_write_sram(struct atw_softc *, u_int, u_int8_t *, u_int); 214 static int atw_media_change(struct ifnet *); 215 static void atw_media_status(struct ifnet *, struct ifmediareq *); 216 static void atw_filter_setup(struct atw_softc *); 217 static void atw_frame_setdurs(struct atw_softc *, struct atw_frame *, int, int); 218 static __inline u_int64_t atw_predict_beacon(u_int64_t, u_int32_t); 219 static void atw_recv_beacon(struct ieee80211com *, struct mbuf *, 220 struct ieee80211_node *, int, int, u_int32_t); 221 static void atw_recv_mgmt(struct ieee80211com *, struct mbuf *, 222 struct ieee80211_node *, int, int, u_int32_t); 223 static void atw_node_free(struct ieee80211com *, struct ieee80211_node *); 224 static struct ieee80211_node *atw_node_alloc(struct ieee80211com *); 225 226 static int atw_tune(struct atw_softc *); 227 228 static void atw_rfio_enable(struct atw_softc *, int); 229 230 /* RFMD RF3000 Baseband Processor */ 231 static int atw_rf3000_init(struct atw_softc *); 232 static int atw_rf3000_tune(struct atw_softc *, u_int8_t); 233 static int atw_rf3000_write(struct atw_softc *, u_int, u_int); 234 #ifdef ATW_DEBUG 235 static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 236 #endif /* ATW_DEBUG */ 237 238 /* Silicon Laboratories Si4126 RF/IF Synthesizer */ 239 static int atw_si4126_tune(struct atw_softc *, u_int8_t); 240 static int atw_si4126_write(struct atw_softc *, u_int, u_int); 241 #ifdef ATW_DEBUG 242 static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 243 #endif /* ATW_DEBUG */ 244 245 const struct atw_txthresh_tab atw_txthresh_tab_lo[] = ATW_TXTHRESH_TAB_LO_RATE; 246 const struct atw_txthresh_tab atw_txthresh_tab_hi[] = ATW_TXTHRESH_TAB_HI_RATE; 247 248 const char *atw_tx_state[] = { 249 "STOPPED", 250 "RUNNING - FETCH", 251 "RUNNING - WAIT", 252 "RUNNING - READING", 253 "-- RESERVED1 --", 254 "-- RESERVED2 --", 255 "SUSPENDED", 256 "RUNNING - CLOSE" 257 }; 258 259 const char *atw_rx_state[] = { 260 "STOPPED", 261 "RUNNING - FETCH", 262 "RUNNING - CHECK", 263 "RUNNING - WAIT", 264 "SUSPENDED", 265 "RUNNING - CLOSE", 266 "RUNNING - FLUSH", 267 "RUNNING - QUEUE" 268 }; 269 270 int 271 atw_activate(struct device *self, enum devact act) 272 { 273 struct atw_softc *sc = (struct atw_softc *)self; 274 int rv = 0, s; 275 276 s = splnet(); 277 switch (act) { 278 case DVACT_ACTIVATE: 279 rv = EOPNOTSUPP; 280 break; 281 282 case DVACT_DEACTIVATE: 283 if_deactivate(&sc->sc_ic.ic_if); 284 break; 285 } 286 splx(s); 287 return rv; 288 } 289 290 /* 291 * atw_enable: 292 * 293 * Enable the ADM8211 chip. 294 */ 295 int 296 atw_enable(sc) 297 struct atw_softc *sc; 298 { 299 300 if (ATW_IS_ENABLED(sc) == 0) { 301 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 302 printf("%s: device enable failed\n", 303 sc->sc_dev.dv_xname); 304 return (EIO); 305 } 306 sc->sc_flags |= ATWF_ENABLED; 307 } 308 return (0); 309 } 310 311 /* 312 * atw_disable: 313 * 314 * Disable the ADM8211 chip. 315 */ 316 void 317 atw_disable(sc) 318 struct atw_softc *sc; 319 { 320 if (!ATW_IS_ENABLED(sc)) 321 return; 322 if (sc->sc_disable != NULL) 323 (*sc->sc_disable)(sc); 324 sc->sc_flags &= ~ATWF_ENABLED; 325 } 326 327 /* Returns -1 on failure. */ 328 int 329 atw_read_srom(struct atw_softc *sc) 330 { 331 struct seeprom_descriptor sd; 332 u_int32_t reg; 333 334 (void)memset(&sd, 0, sizeof(sd)); 335 336 reg = ATW_READ(sc, ATW_TEST0); 337 338 if ((reg & (ATW_TEST0_EPNE|ATW_TEST0_EPSNM)) != 0) { 339 printf("%s: bad or missing/bad SROM\n", sc->sc_dev.dv_xname); 340 return -1; 341 } 342 343 switch (reg & ATW_TEST0_EPTYP_MASK) { 344 case ATW_TEST0_EPTYP_93c66: 345 ATW_DPRINTF(("%s: 93c66 SROM\n", sc->sc_dev.dv_xname)); 346 sc->sc_sromsz = 512; 347 sd.sd_chip = C56_66; 348 break; 349 case ATW_TEST0_EPTYP_93c46: 350 ATW_DPRINTF(("%s: 93c46 SROM\n", sc->sc_dev.dv_xname)); 351 sc->sc_sromsz = 128; 352 sd.sd_chip = C46; 353 break; 354 default: 355 printf("%s: unknown SROM type %d\n", sc->sc_dev.dv_xname, 356 MASK_AND_RSHIFT(reg, ATW_TEST0_EPTYP_MASK)); 357 return -1; 358 } 359 360 sc->sc_srom = malloc(sc->sc_sromsz, M_DEVBUF, M_NOWAIT); 361 362 if (sc->sc_srom == NULL) { 363 printf("%s: unable to allocate SROM buffer\n", 364 sc->sc_dev.dv_xname); 365 return -1; 366 } 367 368 (void)memset(sc->sc_srom, 0, sc->sc_sromsz); 369 370 /* ADM8211 has a single 32-bit register for controlling the 371 * 93cx6 SROM. Bit SRS enables the serial port. There is no 372 * "ready" bit. The ADM8211 input/output sense is the reverse 373 * of read_seeprom's. 374 */ 375 sd.sd_tag = sc->sc_st; 376 sd.sd_bsh = sc->sc_sh; 377 sd.sd_regsize = 4; 378 sd.sd_control_offset = ATW_SPR; 379 sd.sd_status_offset = ATW_SPR; 380 sd.sd_dataout_offset = ATW_SPR; 381 sd.sd_CK = ATW_SPR_SCLK; 382 sd.sd_CS = ATW_SPR_SCS; 383 sd.sd_DI = ATW_SPR_SDO; 384 sd.sd_DO = ATW_SPR_SDI; 385 sd.sd_MS = ATW_SPR_SRS; 386 sd.sd_RDY = 0; 387 388 if (!read_seeprom(&sd, sc->sc_srom, 0, sc->sc_sromsz/2)) { 389 printf("%s: could not read SROM\n", sc->sc_dev.dv_xname); 390 free(sc->sc_srom, M_DEVBUF); 391 return -1; 392 } 393 #ifdef ATW_DEBUG 394 { 395 int i; 396 ATW_DPRINTF(("\nSerial EEPROM:\n\t")); 397 for (i = 0; i < sc->sc_sromsz/2; i = i + 1) { 398 if (((i % 8) == 0) && (i != 0)) { 399 ATW_DPRINTF(("\n\t")); 400 } 401 ATW_DPRINTF((" 0x%x", sc->sc_srom[i])); 402 } 403 ATW_DPRINTF(("\n")); 404 } 405 #endif /* ATW_DEBUG */ 406 return 0; 407 } 408 409 #ifdef ATW_DEBUG 410 static void 411 atw_print_regs(struct atw_softc *sc, const char *where) 412 { 413 #define PRINTREG(sc, reg) \ 414 ATW_DPRINTF2(("%s: reg[ " #reg " / %03x ] = %08x\n", \ 415 sc->sc_dev.dv_xname, reg, ATW_READ(sc, reg))) 416 417 ATW_DPRINTF2(("%s: %s\n", sc->sc_dev.dv_xname, where)); 418 419 PRINTREG(sc, ATW_PAR); 420 PRINTREG(sc, ATW_FRCTL); 421 PRINTREG(sc, ATW_TDR); 422 PRINTREG(sc, ATW_WTDP); 423 PRINTREG(sc, ATW_RDR); 424 PRINTREG(sc, ATW_WRDP); 425 PRINTREG(sc, ATW_RDB); 426 PRINTREG(sc, ATW_CSR3A); 427 PRINTREG(sc, ATW_TDBD); 428 PRINTREG(sc, ATW_TDBP); 429 PRINTREG(sc, ATW_STSR); 430 PRINTREG(sc, ATW_CSR5A); 431 PRINTREG(sc, ATW_NAR); 432 PRINTREG(sc, ATW_CSR6A); 433 PRINTREG(sc, ATW_IER); 434 PRINTREG(sc, ATW_CSR7A); 435 PRINTREG(sc, ATW_LPC); 436 PRINTREG(sc, ATW_TEST1); 437 PRINTREG(sc, ATW_SPR); 438 PRINTREG(sc, ATW_TEST0); 439 PRINTREG(sc, ATW_WCSR); 440 PRINTREG(sc, ATW_WPDR); 441 PRINTREG(sc, ATW_GPTMR); 442 PRINTREG(sc, ATW_GPIO); 443 PRINTREG(sc, ATW_BBPCTL); 444 PRINTREG(sc, ATW_SYNCTL); 445 PRINTREG(sc, ATW_PLCPHD); 446 PRINTREG(sc, ATW_MMIWADDR); 447 PRINTREG(sc, ATW_MMIRADDR1); 448 PRINTREG(sc, ATW_MMIRADDR2); 449 PRINTREG(sc, ATW_TXBR); 450 PRINTREG(sc, ATW_CSR15A); 451 PRINTREG(sc, ATW_ALCSTAT); 452 PRINTREG(sc, ATW_TOFS2); 453 PRINTREG(sc, ATW_CMDR); 454 PRINTREG(sc, ATW_PCIC); 455 PRINTREG(sc, ATW_PMCSR); 456 PRINTREG(sc, ATW_PAR0); 457 PRINTREG(sc, ATW_PAR1); 458 PRINTREG(sc, ATW_MAR0); 459 PRINTREG(sc, ATW_MAR1); 460 PRINTREG(sc, ATW_ATIMDA0); 461 PRINTREG(sc, ATW_ABDA1); 462 PRINTREG(sc, ATW_BSSID0); 463 PRINTREG(sc, ATW_TXLMT); 464 PRINTREG(sc, ATW_MIBCNT); 465 PRINTREG(sc, ATW_BCNT); 466 PRINTREG(sc, ATW_TSFTH); 467 PRINTREG(sc, ATW_TSC); 468 PRINTREG(sc, ATW_SYNRF); 469 PRINTREG(sc, ATW_BPLI); 470 PRINTREG(sc, ATW_CAP0); 471 PRINTREG(sc, ATW_CAP1); 472 PRINTREG(sc, ATW_RMD); 473 PRINTREG(sc, ATW_CFPP); 474 PRINTREG(sc, ATW_TOFS0); 475 PRINTREG(sc, ATW_TOFS1); 476 PRINTREG(sc, ATW_IFST); 477 PRINTREG(sc, ATW_RSPT); 478 PRINTREG(sc, ATW_TSFTL); 479 PRINTREG(sc, ATW_WEPCTL); 480 PRINTREG(sc, ATW_WESK); 481 PRINTREG(sc, ATW_WEPCNT); 482 PRINTREG(sc, ATW_MACTEST); 483 PRINTREG(sc, ATW_FER); 484 PRINTREG(sc, ATW_FEMR); 485 PRINTREG(sc, ATW_FPSR); 486 PRINTREG(sc, ATW_FFER); 487 #undef PRINTREG 488 } 489 #endif /* ATW_DEBUG */ 490 491 /* 492 * Finish attaching an ADMtek ADM8211 MAC. Called by bus-specific front-end. 493 */ 494 void 495 atw_attach(struct atw_softc *sc) 496 { 497 static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = { 498 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 499 }; 500 struct ieee80211com *ic = &sc->sc_ic; 501 struct ifnet *ifp = &ic->ic_if; 502 int country_code, error, i, nrate; 503 u_int32_t reg; 504 static const char *type_strings[] = {"Intersil (not supported)", 505 "RFMD", "Marvel (not supported)"}; 506 507 sc->sc_txth = atw_txthresh_tab_lo; 508 509 SIMPLEQ_INIT(&sc->sc_txfreeq); 510 SIMPLEQ_INIT(&sc->sc_txdirtyq); 511 512 #ifdef ATW_DEBUG 513 atw_print_regs(sc, "atw_attach"); 514 #endif /* ATW_DEBUG */ 515 516 /* 517 * Allocate the control data structures, and create and load the 518 * DMA map for it. 519 */ 520 if ((error = bus_dmamem_alloc(sc->sc_dmat, 521 sizeof(struct atw_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 522 1, &sc->sc_cdnseg, 0)) != 0) { 523 printf("%s: unable to allocate control data, error = %d\n", 524 sc->sc_dev.dv_xname, error); 525 goto fail_0; 526 } 527 528 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg, 529 sizeof(struct atw_control_data), (caddr_t *)&sc->sc_control_data, 530 BUS_DMA_COHERENT)) != 0) { 531 printf("%s: unable to map control data, error = %d\n", 532 sc->sc_dev.dv_xname, error); 533 goto fail_1; 534 } 535 536 if ((error = bus_dmamap_create(sc->sc_dmat, 537 sizeof(struct atw_control_data), 1, 538 sizeof(struct atw_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 539 printf("%s: unable to create control data DMA map, " 540 "error = %d\n", sc->sc_dev.dv_xname, error); 541 goto fail_2; 542 } 543 544 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 545 sc->sc_control_data, sizeof(struct atw_control_data), NULL, 546 0)) != 0) { 547 printf("%s: unable to load control data DMA map, error = %d\n", 548 sc->sc_dev.dv_xname, error); 549 goto fail_3; 550 } 551 552 /* 553 * Create the transmit buffer DMA maps. 554 */ 555 sc->sc_ntxsegs = ATW_NTXSEGS; 556 for (i = 0; i < ATW_TXQUEUELEN; i++) { 557 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 558 sc->sc_ntxsegs, MCLBYTES, 0, 0, 559 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 560 printf("%s: unable to create tx DMA map %d, " 561 "error = %d\n", sc->sc_dev.dv_xname, i, error); 562 goto fail_4; 563 } 564 } 565 566 /* 567 * Create the receive buffer DMA maps. 568 */ 569 for (i = 0; i < ATW_NRXDESC; i++) { 570 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 571 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 572 printf("%s: unable to create rx DMA map %d, " 573 "error = %d\n", sc->sc_dev.dv_xname, i, error); 574 goto fail_5; 575 } 576 } 577 for (i = 0; i < ATW_NRXDESC; i++) { 578 sc->sc_rxsoft[i].rxs_mbuf = NULL; 579 } 580 581 /* Reset the chip to a known state. */ 582 atw_reset(sc); 583 584 if (atw_read_srom(sc) == -1) 585 return; 586 587 sc->sc_rftype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 588 ATW_SR_RFTYPE_MASK); 589 590 sc->sc_bbptype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 591 ATW_SR_BBPTYPE_MASK); 592 593 if (sc->sc_rftype > sizeof(type_strings)/sizeof(type_strings[0])) { 594 printf("%s: unknown RF\n", sc->sc_dev.dv_xname); 595 return; 596 } 597 if (sc->sc_bbptype > sizeof(type_strings)/sizeof(type_strings[0])) { 598 printf("%s: unknown BBP\n", sc->sc_dev.dv_xname); 599 return; 600 } 601 602 printf("%s: %s RF, %s BBP", sc->sc_dev.dv_xname, 603 type_strings[sc->sc_rftype], type_strings[sc->sc_bbptype]); 604 605 /* XXX There exists a Linux driver which seems to use RFType = 0 for 606 * MARVEL. My bug, or theirs? 607 */ 608 609 reg = LSHIFT(sc->sc_rftype, ATW_SYNCTL_RFTYPE_MASK); 610 611 switch (sc->sc_rftype) { 612 case ATW_RFTYPE_INTERSIL: 613 reg |= ATW_SYNCTL_CS1; 614 break; 615 case ATW_RFTYPE_RFMD: 616 reg |= ATW_SYNCTL_CS0; 617 break; 618 case ATW_RFTYPE_MARVEL: 619 break; 620 } 621 622 sc->sc_synctl_rd = reg | ATW_SYNCTL_RD; 623 sc->sc_synctl_wr = reg | ATW_SYNCTL_WR; 624 625 reg = LSHIFT(sc->sc_bbptype, ATW_BBPCTL_TYPE_MASK); 626 627 switch (sc->sc_bbptype) { 628 case ATW_RFTYPE_INTERSIL: 629 reg |= ATW_BBPCTL_TWI; 630 break; 631 case ATW_RFTYPE_RFMD: 632 reg |= ATW_BBPCTL_RF3KADDR_ADDR | ATW_BBPCTL_NEGEDGE_DO | 633 ATW_BBPCTL_CCA_ACTLO; 634 break; 635 case ATW_RFTYPE_MARVEL: 636 break; 637 } 638 639 sc->sc_bbpctl_wr = reg | ATW_BBPCTL_WR; 640 sc->sc_bbpctl_rd = reg | ATW_BBPCTL_RD; 641 642 /* 643 * From this point forward, the attachment cannot fail. A failure 644 * before this point releases all resources that may have been 645 * allocated. 646 */ 647 sc->sc_flags |= ATWF_ATTACHED /* | ATWF_RTSCTS */; 648 649 ATW_DPRINTF((" SROM MAC %04x%04x%04x", 650 htole16(sc->sc_srom[ATW_SR_MAC00]), 651 htole16(sc->sc_srom[ATW_SR_MAC01]), 652 htole16(sc->sc_srom[ATW_SR_MAC10]))); 653 654 country_code = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CTRY_CR29], 655 ATW_SR_CTRY_MASK); 656 657 #define ADD_CHANNEL(_ic, _chan) do { \ 658 _ic->ic_channels[_chan].ic_flags = IEEE80211_CHAN_B; \ 659 _ic->ic_channels[_chan].ic_freq = \ 660 ieee80211_ieee2mhz(_chan, _ic->ic_channels[_chan].ic_flags);\ 661 } while (0) 662 663 /* Find available channels */ 664 switch (country_code) { 665 case COUNTRY_MMK2: /* 1-14 */ 666 ADD_CHANNEL(ic, 14); 667 /*FALLTHROUGH*/ 668 case COUNTRY_ETSI: /* 1-13 */ 669 for (i = 1; i <= 13; i++) 670 ADD_CHANNEL(ic, i); 671 break; 672 case COUNTRY_FCC: /* 1-11 */ 673 case COUNTRY_IC: /* 1-11 */ 674 for (i = 1; i <= 11; i++) 675 ADD_CHANNEL(ic, i); 676 break; 677 case COUNTRY_MMK: /* 14 */ 678 ADD_CHANNEL(ic, 14); 679 break; 680 case COUNTRY_FRANCE: /* 10-13 */ 681 for (i = 10; i <= 13; i++) 682 ADD_CHANNEL(ic, i); 683 break; 684 default: /* assume channels 10-11 */ 685 case COUNTRY_SPAIN: /* 10-11 */ 686 for (i = 10; i <= 11; i++) 687 ADD_CHANNEL(ic, i); 688 break; 689 } 690 691 /* Read the MAC address. */ 692 reg = ATW_READ(sc, ATW_PAR0); 693 ic->ic_myaddr[0] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB0_MASK); 694 ic->ic_myaddr[1] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB1_MASK); 695 ic->ic_myaddr[2] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB2_MASK); 696 ic->ic_myaddr[3] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB3_MASK); 697 reg = ATW_READ(sc, ATW_PAR1); 698 ic->ic_myaddr[4] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB4_MASK); 699 ic->ic_myaddr[5] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB5_MASK); 700 701 if (IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) { 702 printf(" could not get mac address, attach failed\n"); 703 return; 704 } 705 706 printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr)); 707 708 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 709 ifp->if_softc = sc; 710 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST | 711 IFF_NOTRAILERS; 712 ifp->if_ioctl = atw_ioctl; 713 ifp->if_start = atw_start; 714 ifp->if_watchdog = atw_watchdog; 715 ifp->if_init = atw_init; 716 ifp->if_stop = atw_stop; 717 IFQ_SET_READY(&ifp->if_snd); 718 719 ic->ic_phytype = IEEE80211_T_DS; 720 ic->ic_opmode = IEEE80211_M_STA; 721 ic->ic_caps = IEEE80211_C_PMGT | IEEE80211_C_IBSS | 722 IEEE80211_C_HOSTAP | IEEE80211_C_MONITOR | IEEE80211_C_WEP; 723 724 nrate = 0; 725 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 2; 726 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 4; 727 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 11; 728 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 22; 729 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate; 730 731 /* 732 * Call MI attach routines. 733 */ 734 735 if_attach(ifp); 736 ieee80211_ifattach(ifp); 737 738 sc->sc_newstate = ic->ic_newstate; 739 ic->ic_newstate = atw_newstate; 740 741 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 742 ic->ic_recv_mgmt = atw_recv_mgmt; 743 744 sc->sc_node_free = ic->ic_node_free; 745 ic->ic_node_free = atw_node_free; 746 747 sc->sc_node_alloc = ic->ic_node_alloc; 748 ic->ic_node_alloc = atw_node_alloc; 749 750 /* possibly we should fill in our own sc_send_prresp, since 751 * the ADM8211 is probably sending probe responses in ad hoc 752 * mode. 753 */ 754 755 /* complete initialization */ 756 ieee80211_media_init(ifp, atw_media_change, atw_media_status); 757 callout_init(&sc->sc_scan_ch); 758 759 #if NBPFILTER > 0 760 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 761 sizeof(struct ieee80211_frame) + 64, &sc->sc_radiobpf); 762 #endif 763 764 /* 765 * Make sure the interface is shutdown during reboot. 766 */ 767 sc->sc_sdhook = shutdownhook_establish(atw_shutdown, sc); 768 if (sc->sc_sdhook == NULL) 769 printf("%s: WARNING: unable to establish shutdown hook\n", 770 sc->sc_dev.dv_xname); 771 772 /* 773 * Add a suspend hook to make sure we come back up after a 774 * resume. 775 */ 776 sc->sc_powerhook = powerhook_establish(atw_power, sc); 777 if (sc->sc_powerhook == NULL) 778 printf("%s: WARNING: unable to establish power hook\n", 779 sc->sc_dev.dv_xname); 780 781 memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu)); 782 sc->sc_rxtap.ar_ihdr.it_len = sizeof(sc->sc_rxtapu); 783 sc->sc_rxtap.ar_ihdr.it_present = ATW_RX_RADIOTAP_PRESENT; 784 785 memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu)); 786 sc->sc_txtap.at_ihdr.it_len = sizeof(sc->sc_txtapu); 787 sc->sc_txtap.at_ihdr.it_present = ATW_TX_RADIOTAP_PRESENT; 788 789 return; 790 791 /* 792 * Free any resources we've allocated during the failed attach 793 * attempt. Do this in reverse order and fall through. 794 */ 795 fail_5: 796 for (i = 0; i < ATW_NRXDESC; i++) { 797 if (sc->sc_rxsoft[i].rxs_dmamap == NULL) 798 continue; 799 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxsoft[i].rxs_dmamap); 800 } 801 fail_4: 802 for (i = 0; i < ATW_TXQUEUELEN; i++) { 803 if (sc->sc_txsoft[i].txs_dmamap == NULL) 804 continue; 805 bus_dmamap_destroy(sc->sc_dmat, sc->sc_txsoft[i].txs_dmamap); 806 } 807 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 808 fail_3: 809 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 810 fail_2: 811 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 812 sizeof(struct atw_control_data)); 813 fail_1: 814 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 815 fail_0: 816 return; 817 } 818 819 static struct ieee80211_node * 820 atw_node_alloc(struct ieee80211com *ic) 821 { 822 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 823 struct ieee80211_node *ni = (*sc->sc_node_alloc)(ic); 824 825 DPRINTF(sc, ("%s: alloc node %p\n", sc->sc_dev.dv_xname, ni)); 826 return ni; 827 } 828 829 static void 830 atw_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 831 { 832 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 833 834 DPRINTF(sc, ("%s: freeing node %p %s\n", sc->sc_dev.dv_xname, ni, 835 ether_sprintf(ni->ni_bssid))); 836 (*sc->sc_node_free)(ic, ni); 837 } 838 839 /* 840 * atw_reset: 841 * 842 * Perform a soft reset on the ADM8211. 843 */ 844 void 845 atw_reset(sc) 846 struct atw_softc *sc; 847 { 848 int i; 849 850 if (ATW_IS_ENABLED(sc) == 0) 851 return; 852 853 ATW_WRITE(sc, ATW_PAR, ATW_PAR_SWR); 854 855 for (i = 0; i < 10000; i++) { 856 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR) == 0) 857 break; 858 DELAY(1); 859 } 860 861 DPRINTF2(sc, ("%s: atw_reset %d iterations\n", sc->sc_dev.dv_xname, i)); 862 863 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR)) 864 printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname); 865 866 /* Turn off maximum power saving. */ 867 ATW_CLR(sc, ATW_FRCTL, ATW_FRCTL_MAXPSP); 868 869 /* Recall EEPROM. */ 870 ATW_SET(sc, ATW_TEST0, ATW_TEST0_EPRLD); 871 872 DELAY(10 * 1000); 873 874 /* A reset seems to affect the SRAM contents, so put them into 875 * a known state. 876 */ 877 atw_clear_sram(sc); 878 879 memset(sc->sc_bssid, 0, sizeof(sc->sc_bssid)); 880 881 sc->sc_lost_bcn_thresh = 0; 882 } 883 884 static void 885 atw_clear_sram(sc) 886 struct atw_softc *sc; 887 { 888 #if 0 889 for (addr = 0; addr < 448; addr++) { 890 ATW_WRITE(sc, ATW_WEPCTL, 891 ATW_WEPCTL_WR | ATW_WEPCTL_UNKNOWN0 | addr); 892 DELAY(1000); 893 ATW_WRITE(sc, ATW_WESK, 0); 894 DELAY(1000); /* paranoia */ 895 } 896 return; 897 #endif 898 memset(sc->sc_sram, 0, sizeof(sc->sc_sram)); 899 /* XXX not for revision 0x20. */ 900 atw_write_sram(sc, 0, sc->sc_sram, sizeof(sc->sc_sram)); 901 } 902 903 /* TBD atw_init 904 * 905 * set MAC based on ic->ic_bss->myaddr 906 * write WEP keys 907 * set TX rate 908 */ 909 910 /* 911 * atw_init: [ ifnet interface function ] 912 * 913 * Initialize the interface. Must be called at splnet(). 914 */ 915 int 916 atw_init(ifp) 917 struct ifnet *ifp; 918 { 919 struct atw_softc *sc = ifp->if_softc; 920 struct ieee80211com *ic = &sc->sc_ic; 921 struct atw_txsoft *txs; 922 struct atw_rxsoft *rxs; 923 u_int32_t reg; 924 int i, error = 0; 925 926 if ((error = atw_enable(sc)) != 0) 927 goto out; 928 929 /* 930 * Cancel any pending I/O. This also resets. 931 */ 932 atw_stop(ifp, 0); 933 934 ic->ic_bss->ni_chan = ic->ic_ibss_chan; 935 DPRINTF(sc, ("%s: channel %d freq %d flags 0x%04x\n", 936 __func__, ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 937 ic->ic_bss->ni_chan->ic_freq, ic->ic_bss->ni_chan->ic_flags)); 938 939 /* Turn off APM??? (A binary-only driver does this.) 940 * 941 * Set Rx store-and-forward mode. 942 */ 943 reg = ATW_READ(sc, ATW_CMDR); 944 reg &= ~ATW_CMDR_APM; 945 reg &= ~ATW_CMDR_DRT_MASK; 946 reg |= ATW_CMDR_RTE | LSHIFT(0x2, ATW_CMDR_DRT_MASK); 947 948 ATW_WRITE(sc, ATW_CMDR, reg); 949 950 /* Set data rate for PLCP Signal field, 1Mbps = 10 x 100Kb/s. 951 * 952 * XXX a binary-only driver sets a different service field than 953 * 0. why? 954 */ 955 reg = ATW_READ(sc, ATW_PLCPHD); 956 reg &= ~(ATW_PLCPHD_SERVICE_MASK|ATW_PLCPHD_SIGNAL_MASK); 957 reg |= LSHIFT(10, ATW_PLCPHD_SIGNAL_MASK) | 958 LSHIFT(0xb0, ATW_PLCPHD_SERVICE_MASK); 959 ATW_WRITE(sc, ATW_PLCPHD, reg); 960 961 /* XXX this magic can probably be figured out from the RFMD docs */ 962 reg = LSHIFT(4, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 963 LSHIFT(13, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 964 LSHIFT(8, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 965 LSHIFT(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 966 LSHIFT(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 967 LSHIFT(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 968 LSHIFT(4, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 969 LSHIFT(5, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 970 ATW_WRITE(sc, ATW_TOFS2, reg); 971 972 ATW_WRITE(sc, ATW_TXLMT, LSHIFT(512, ATW_TXLMT_MTMLT_MASK) | 973 LSHIFT(224, ATW_TXLMT_SRTYLIM_MASK)); 974 975 /* XXX this resets an Intersil RF front-end? */ 976 /* TBD condition on Intersil RFType? */ 977 ATW_WRITE(sc, ATW_SYNRF, ATW_SYNRF_INTERSIL_EN); 978 DELAY(10 * 1000); 979 ATW_WRITE(sc, ATW_SYNRF, 0); 980 DELAY(5 * 1000); 981 982 /* 16 TU max duration for contention-free period */ 983 reg = ATW_READ(sc, ATW_CFPP) & ~ATW_CFPP_CFPMD; 984 ATW_WRITE(sc, ATW_CFPP, reg | LSHIFT(16, ATW_CFPP_CFPMD)); 985 986 /* XXX I guess that the Cardbus clock is 22MHz? 987 * I am assuming that the role of ATW_TOFS0_USCNT is 988 * to divide the bus clock to get a 1MHz clock---the datasheet is not 989 * very clear on this point. It says in the datasheet that it is 990 * possible for the ADM8211 to accomodate bus speeds between 22MHz 991 * and 33MHz; maybe this is the way? I see a binary-only driver write 992 * these values. These values are also the power-on default. 993 */ 994 ATW_WRITE(sc, ATW_TOFS0, 995 LSHIFT(22, ATW_TOFS0_USCNT_MASK) | 996 ATW_TOFS0_TUCNT_MASK /* set all bits in TUCNT */); 997 998 /* Initialize interframe spacing. EIFS=0x64 is used by a binary-only 999 * driver. Go figure. 1000 */ 1001 reg = LSHIFT(IEEE80211_DUR_DS_SLOT, ATW_IFST_SLOT_MASK) | 1002 LSHIFT(22 * IEEE80211_DUR_DS_SIFS /* # of 22MHz cycles */, 1003 ATW_IFST_SIFS_MASK) | 1004 LSHIFT(IEEE80211_DUR_DS_DIFS, ATW_IFST_DIFS_MASK) | 1005 LSHIFT(0x64 /* IEEE80211_DUR_DS_EIFS */, ATW_IFST_EIFS_MASK); 1006 1007 ATW_WRITE(sc, ATW_IFST, reg); 1008 1009 /* XXX More magic. Might relate to ACK timing. */ 1010 ATW_WRITE(sc, ATW_RSPT, LSHIFT(0xffff, ATW_RSPT_MART_MASK) | 1011 LSHIFT(0xff, ATW_RSPT_MIRT_MASK)); 1012 1013 /* Set up the MMI read/write addresses for the BBP. 1014 * 1015 * TBD find out the Marvel settings. 1016 */ 1017 switch (sc->sc_bbptype) { 1018 case ATW_BBPTYPE_INTERSIL: 1019 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_INTERSIL); 1020 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_INTERSIL); 1021 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_INTERSIL); 1022 break; 1023 case ATW_BBPTYPE_MARVEL: 1024 break; 1025 case ATW_BBPTYPE_RFMD: 1026 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_RFMD); 1027 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_RFMD); 1028 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_RFMD); 1029 default: 1030 break; 1031 } 1032 1033 sc->sc_wepctl = 0; 1034 ATW_WRITE(sc, ATW_MACTEST, ATW_MACTEST_MMI_USETXCLK); 1035 1036 if ((error = atw_rf3000_init(sc)) != 0) 1037 goto out; 1038 1039 /* 1040 * Initialize the PCI Access Register. 1041 */ 1042 sc->sc_busmode = ATW_PAR_BAR; /* XXX what is this? */ 1043 1044 /* 1045 * If we're allowed to do so, use Memory Read Line 1046 * and Memory Read Multiple. 1047 * 1048 * XXX Should we use Memory Write and Invalidate? 1049 */ 1050 if (sc->sc_flags & ATWF_MRL) 1051 sc->sc_busmode |= ATW_PAR_MRLE; 1052 if (sc->sc_flags & ATWF_MRM) 1053 sc->sc_busmode |= ATW_PAR_MRME; 1054 if (sc->sc_flags & ATWF_MWI) 1055 sc->sc_busmode |= ATW_PAR_MWIE; 1056 if (sc->sc_maxburst == 0) 1057 sc->sc_maxburst = 8; /* ADM8211 default */ 1058 1059 switch (sc->sc_cacheline) { 1060 default: 1061 /* Use burst length. */ 1062 break; 1063 case 8: 1064 sc->sc_busmode |= ATW_PAR_CAL_8DW; 1065 break; 1066 case 16: 1067 sc->sc_busmode |= ATW_PAR_CAL_16DW; 1068 break; 1069 case 32: 1070 sc->sc_busmode |= ATW_PAR_CAL_32DW; 1071 break; 1072 } 1073 switch (sc->sc_maxburst) { 1074 case 1: 1075 sc->sc_busmode |= ATW_PAR_PBL_1DW; 1076 break; 1077 case 2: 1078 sc->sc_busmode |= ATW_PAR_PBL_2DW; 1079 break; 1080 case 4: 1081 sc->sc_busmode |= ATW_PAR_PBL_4DW; 1082 break; 1083 case 8: 1084 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1085 break; 1086 case 16: 1087 sc->sc_busmode |= ATW_PAR_PBL_16DW; 1088 break; 1089 case 32: 1090 sc->sc_busmode |= ATW_PAR_PBL_32DW; 1091 break; 1092 default: 1093 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1094 break; 1095 } 1096 1097 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 1098 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1099 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1100 1101 /* 1102 * Initialize the OPMODE register. We don't write it until 1103 * we're ready to begin the transmit and receive processes. 1104 */ 1105 sc->sc_opmode = ATW_NAR_SR | ATW_NAR_ST | 1106 sc->sc_txth[sc->sc_txthresh].txth_opmode; 1107 1108 /* 1109 * Initialize the transmit descriptor ring. 1110 */ 1111 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1112 for (i = 0; i < ATW_NTXDESC; i++) { 1113 /* no transmit chaining */ 1114 sc->sc_txdescs[i].at_ctl = 0 /* ATW_TXFLAG_TCH */; 1115 sc->sc_txdescs[i].at_buf2 = 1116 htole32(ATW_CDTXADDR(sc, ATW_NEXTTX(i))); 1117 } 1118 /* use ring mode */ 1119 sc->sc_txdescs[ATW_NTXDESC - 1].at_ctl |= ATW_TXFLAG_TER; 1120 ATW_CDTXSYNC(sc, 0, ATW_NTXDESC, 1121 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1122 sc->sc_txfree = ATW_NTXDESC; 1123 sc->sc_txnext = 0; 1124 1125 /* 1126 * Initialize the transmit job descriptors. 1127 */ 1128 SIMPLEQ_INIT(&sc->sc_txfreeq); 1129 SIMPLEQ_INIT(&sc->sc_txdirtyq); 1130 for (i = 0; i < ATW_TXQUEUELEN; i++) { 1131 txs = &sc->sc_txsoft[i]; 1132 txs->txs_mbuf = NULL; 1133 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1134 } 1135 1136 /* 1137 * Initialize the receive descriptor and receive job 1138 * descriptor rings. 1139 */ 1140 for (i = 0; i < ATW_NRXDESC; i++) { 1141 rxs = &sc->sc_rxsoft[i]; 1142 if (rxs->rxs_mbuf == NULL) { 1143 if ((error = atw_add_rxbuf(sc, i)) != 0) { 1144 printf("%s: unable to allocate or map rx " 1145 "buffer %d, error = %d\n", 1146 sc->sc_dev.dv_xname, i, error); 1147 /* 1148 * XXX Should attempt to run with fewer receive 1149 * XXX buffers instead of just failing. 1150 */ 1151 atw_rxdrain(sc); 1152 goto out; 1153 } 1154 } else 1155 ATW_INIT_RXDESC(sc, i); 1156 } 1157 sc->sc_rxptr = 0; 1158 1159 /* disable all wake-up events */ 1160 ATW_CLR(sc, ATW_WCSR, ATW_WCSR_WP1E|ATW_WCSR_WP2E|ATW_WCSR_WP3E| 1161 ATW_WCSR_WP4E|ATW_WCSR_WP5E|ATW_WCSR_TSFTWE| 1162 ATW_WCSR_TIMWE|ATW_WCSR_ATIMWE|ATW_WCSR_KEYWE| 1163 ATW_WCSR_WFRE|ATW_WCSR_MPRE|ATW_WCSR_LSOE); 1164 1165 /* ack all wake-up events */ 1166 ATW_SET(sc, ATW_WCSR, 0); 1167 1168 /* 1169 * Initialize the interrupt mask and enable interrupts. 1170 */ 1171 /* normal interrupts */ 1172 sc->sc_inten = ATW_INTR_TCI | ATW_INTR_TDU | ATW_INTR_RCI | 1173 ATW_INTR_NISS | ATW_INTR_LINKON | ATW_INTR_BCNTC; 1174 1175 /* abnormal interrupts */ 1176 sc->sc_inten |= ATW_INTR_TPS | ATW_INTR_TLT | ATW_INTR_TRT | 1177 ATW_INTR_TUF | ATW_INTR_RDU | ATW_INTR_RPS | ATW_INTR_AISS | 1178 ATW_INTR_FBE | ATW_INTR_LINKOFF | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1179 1180 sc->sc_linkint_mask = ATW_INTR_LINKON | ATW_INTR_LINKOFF | 1181 ATW_INTR_BCNTC | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1182 sc->sc_rxint_mask = ATW_INTR_RCI | ATW_INTR_RDU; 1183 sc->sc_txint_mask = ATW_INTR_TCI | ATW_INTR_TUF | ATW_INTR_TLT | 1184 ATW_INTR_TRT; 1185 1186 sc->sc_linkint_mask &= sc->sc_inten; 1187 sc->sc_rxint_mask &= sc->sc_inten; 1188 sc->sc_txint_mask &= sc->sc_inten; 1189 1190 ATW_WRITE(sc, ATW_IER, sc->sc_inten); 1191 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1192 if (sc->sc_intr_ack != NULL) 1193 (*sc->sc_intr_ack)(sc); 1194 1195 DPRINTF(sc, ("%s: ATW_IER %08x, inten %08x\n", 1196 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_IER), sc->sc_inten)); 1197 1198 /* 1199 * Give the transmit and receive rings to the ADM8211. 1200 */ 1201 ATW_WRITE(sc, ATW_TDBD, ATW_CDTXADDR(sc, sc->sc_txnext)); 1202 ATW_WRITE(sc, ATW_RDB, ATW_CDRXADDR(sc, sc->sc_rxptr)); 1203 1204 /* common 802.11 configuration */ 1205 ic->ic_flags &= ~IEEE80211_F_IBSSON; 1206 switch (ic->ic_opmode) { 1207 case IEEE80211_M_STA: 1208 sc->sc_opmode &= ~ATW_NAR_EA; 1209 break; 1210 case IEEE80211_M_AHDEMO: /* XXX */ 1211 case IEEE80211_M_IBSS: 1212 ic->ic_flags |= IEEE80211_F_IBSSON; 1213 /*FALLTHROUGH*/ 1214 case IEEE80211_M_HOSTAP: /* XXX */ 1215 /* EA bit seems important for ad hoc reception. */ 1216 sc->sc_opmode |= ATW_NAR_EA; 1217 break; 1218 case IEEE80211_M_MONITOR: /* XXX */ 1219 break; 1220 } 1221 1222 atw_start_beacon(sc, 0); 1223 1224 switch (ic->ic_opmode) { 1225 case IEEE80211_M_AHDEMO: 1226 case IEEE80211_M_HOSTAP: 1227 ic->ic_bss->ni_intval = ic->ic_lintval; 1228 ic->ic_bss->ni_rssi = 0; 1229 ic->ic_bss->ni_rstamp = 0; 1230 break; 1231 default: /* XXX */ 1232 break; 1233 } 1234 1235 atw_write_ssid(sc); 1236 atw_write_sup_rates(sc); 1237 if (ic->ic_caps & IEEE80211_C_WEP) 1238 atw_write_wep(sc); 1239 1240 /* 1241 * Set the receive filter. This will start the transmit and 1242 * receive processes. 1243 */ 1244 atw_filter_setup(sc); 1245 1246 /* 1247 * Start the receive process. 1248 */ 1249 ATW_WRITE(sc, ATW_RDR, 0x1); 1250 1251 /* 1252 * Note that the interface is now running. 1253 */ 1254 ifp->if_flags |= IFF_RUNNING; 1255 ifp->if_flags &= ~IFF_OACTIVE; 1256 ic->ic_state = IEEE80211_S_INIT; 1257 1258 if (ic->ic_opmode != IEEE80211_M_MONITOR) 1259 error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1260 else 1261 error = ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1262 out: 1263 if (error) { 1264 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1265 ifp->if_timer = 0; 1266 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1267 } 1268 #ifdef ATW_DEBUG 1269 atw_print_regs(sc, "end of init"); 1270 #endif /* ATW_DEBUG */ 1271 1272 return (error); 1273 } 1274 1275 /* enable == 1: host control of RF3000/Si4126 through ATW_SYNCTL. 1276 * 0: MAC control of RF3000/Si4126. 1277 * 1278 * Applies power, or selects RF front-end? Sets reset condition. 1279 * 1280 * TBD support non-RFMD BBP, non-SiLabs synth. 1281 */ 1282 static void 1283 atw_rfio_enable(struct atw_softc *sc, int enable) 1284 { 1285 if (enable) { 1286 ATW_WRITE(sc, ATW_SYNRF, 1287 ATW_SYNRF_SELRF|ATW_SYNRF_PE1|ATW_SYNRF_PHYRST); 1288 DELAY(atw_rfio_enable_delay); 1289 } else { 1290 ATW_WRITE(sc, ATW_SYNRF, 0); 1291 DELAY(atw_rfio_disable_delay); /* shorter for some reason */ 1292 } 1293 } 1294 1295 static int 1296 atw_tune(sc) 1297 struct atw_softc *sc; 1298 { 1299 int rc; 1300 u_int32_t reg; 1301 int chan; 1302 struct ieee80211com *ic = &sc->sc_ic; 1303 1304 chan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 1305 if (chan == IEEE80211_CHAN_ANY) 1306 panic("%s: chan == IEEE80211_CHAN_ANY\n", __func__); 1307 1308 if (chan == sc->sc_cur_chan) 1309 return 0; 1310 1311 DPRINTF(sc, ("%s: chan %d -> %d\n", sc->sc_dev.dv_xname, 1312 sc->sc_cur_chan, chan)); 1313 1314 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1315 1316 if ((rc = atw_si4126_tune(sc, chan)) != 0 || 1317 (rc = atw_rf3000_tune(sc, chan)) != 0) 1318 printf("%s: failed to tune channel %d\n", sc->sc_dev.dv_xname, 1319 chan); 1320 1321 reg = ATW_READ(sc, ATW_CAP0) & ~ATW_CAP0_CHN_MASK; 1322 ATW_WRITE(sc, ATW_CAP0, 1323 reg | LSHIFT(chan, ATW_CAP0_CHN_MASK)); 1324 1325 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1326 1327 if (rc == 0) 1328 sc->sc_cur_chan = chan; 1329 1330 return rc; 1331 } 1332 1333 #ifdef ATW_DEBUG 1334 static void 1335 atw_si4126_print(sc) 1336 struct atw_softc *sc; 1337 { 1338 struct ifnet *ifp = &sc->sc_ic.ic_if; 1339 u_int addr, val; 1340 1341 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1342 return; 1343 1344 for (addr = 0; addr <= 8; addr++) { 1345 printf("%s: synth[%d] = ", sc->sc_dev.dv_xname, addr); 1346 if (atw_si4126_read(sc, addr, &val) == 0) { 1347 printf("<unknown> (quitting print-out)\n"); 1348 break; 1349 } 1350 printf("%05x\n", val); 1351 } 1352 } 1353 #endif /* ATW_DEBUG */ 1354 1355 /* Tune to channel chan by adjusting the Si4126 RF/IF synthesizer. 1356 * 1357 * The RF/IF synthesizer produces two reference frequencies for 1358 * the RF2948B transceiver. The first frequency the RF2948B requires 1359 * is two times the so-called "intermediate frequency" (IF). Since 1360 * a SAW filter on the radio fixes the IF at 374MHz, I program the 1361 * Si4126 to generate IF LO = 374MHz x 2 = 748MHz. The second 1362 * frequency required by the transceiver is the radio frequency 1363 * (RF). This is a superheterodyne transceiver; for f(chan) the 1364 * center frequency of the channel we are tuning, RF = f(chan) - 1365 * IF. 1366 * 1367 * XXX I am told by SiLabs that the Si4126 will accept a broader range 1368 * of XIN than the 2-25MHz mentioned by the datasheet, even *without* 1369 * XINDIV2 = 1. I've tried this (it is necessary to double R) and it 1370 * works, but I have still programmed for XINDIV2 = 1 to be safe. 1371 */ 1372 static int 1373 atw_si4126_tune(sc, chan) 1374 struct atw_softc *sc; 1375 u_int8_t chan; 1376 { 1377 int rc = 0; 1378 u_int mhz; 1379 u_int R; 1380 u_int32_t reg; 1381 u_int16_t gain; 1382 1383 #ifdef ATW_DEBUG 1384 atw_si4126_print(sc); 1385 #endif /* ATW_DEBUG */ 1386 1387 if (chan == 14) 1388 mhz = 2484; 1389 else 1390 mhz = 2412 + 5 * (chan - 1); 1391 1392 /* Tune IF to 748MHz to suit the IF LO input of the 1393 * RF2494B, which is 2 x IF. No need to set an IF divider 1394 * because an IF in 526MHz - 952MHz is allowed. 1395 * 1396 * XIN is 44.000MHz, so divide it by two to get allowable 1397 * range of 2-25MHz. SiLabs tells me that this is not 1398 * strictly necessary. 1399 */ 1400 1401 R = 44; 1402 1403 atw_rfio_enable(sc, 1); 1404 1405 /* Power-up RF, IF synthesizers. */ 1406 if ((rc = atw_si4126_write(sc, SI4126_POWER, 1407 SI4126_POWER_PDIB|SI4126_POWER_PDRB)) != 0) 1408 goto out; 1409 1410 /* If RF2 N > 2047, then set KP2 to 1. */ 1411 gain = LSHIFT(((mhz - 374) > 2047) ? 1 : 0, SI4126_GAIN_KP2_MASK); 1412 1413 if ((rc = atw_si4126_write(sc, SI4126_GAIN, gain)) != 0) 1414 goto out; 1415 1416 /* set LPWR, too? */ 1417 if ((rc = atw_si4126_write(sc, SI4126_MAIN, 1418 SI4126_MAIN_XINDIV2)) != 0) 1419 goto out; 1420 1421 /* We set XINDIV2 = 1, so IF = N/(2 * R) * XIN. XIN = 44MHz. 1422 * I choose N = 1496, R = 44 so that 1496/(2 * 44) * 44MHz = 748MHz. 1423 */ 1424 if ((rc = atw_si4126_write(sc, SI4126_IFN, 1496)) != 0) 1425 goto out; 1426 1427 if ((rc = atw_si4126_write(sc, SI4126_IFR, R)) != 0) 1428 goto out; 1429 1430 /* Set RF1 arbitrarily. DO NOT configure RF1 after RF2, because 1431 * then RF1 becomes the active RF synthesizer, even on the Si4126, 1432 * which has no RF1! 1433 */ 1434 if ((rc = atw_si4126_write(sc, SI4126_RF1R, R)) != 0) 1435 goto out; 1436 1437 if ((rc = atw_si4126_write(sc, SI4126_RF1N, mhz - 374)) != 0) 1438 goto out; 1439 1440 /* N/R * XIN = RF. XIN = 44MHz. We desire RF = mhz - IF, 1441 * where IF = 374MHz. Let's divide XIN to 1MHz. So R = 44. 1442 * Now let's multiply it to mhz. So mhz - IF = N. 1443 */ 1444 if ((rc = atw_si4126_write(sc, SI4126_RF2R, R)) != 0) 1445 goto out; 1446 1447 if ((rc = atw_si4126_write(sc, SI4126_RF2N, mhz - 374)) != 0) 1448 goto out; 1449 1450 /* wait 100us from power-up for RF, IF to settle */ 1451 DELAY(100); 1452 1453 if ((sc->sc_if.if_flags & IFF_LINK1) == 0 || chan == 14) { 1454 /* XXX there is a binary driver which sends 1455 * ATW_GPIO_EN_MASK = 1, ATW_GPIO_O_MASK = 1. I had speculated 1456 * that this enables the Si4126 by raising its PWDN#, but I 1457 * think that it actually sets the Prism RF front-end 1458 * to a special mode for channel 14. 1459 */ 1460 reg = ATW_READ(sc, ATW_GPIO); 1461 reg &= ~(ATW_GPIO_EN_MASK|ATW_GPIO_O_MASK|ATW_GPIO_I_MASK); 1462 reg |= LSHIFT(1, ATW_GPIO_EN_MASK) | LSHIFT(1, ATW_GPIO_O_MASK); 1463 ATW_WRITE(sc, ATW_GPIO, reg); 1464 } 1465 1466 #ifdef ATW_DEBUG 1467 atw_si4126_print(sc); 1468 #endif /* ATW_DEBUG */ 1469 1470 out: 1471 atw_rfio_enable(sc, 0); 1472 1473 return rc; 1474 } 1475 1476 /* Baseline initialization of RF3000 BBP: set CCA mode and enable antenna 1477 * diversity. 1478 * 1479 * Call this w/ Tx/Rx suspended. 1480 */ 1481 static int 1482 atw_rf3000_init(sc) 1483 struct atw_softc *sc; 1484 { 1485 int rc = 0; 1486 1487 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1488 1489 atw_rfio_enable(sc, 1); 1490 1491 /* enable diversity */ 1492 rc = atw_rf3000_write(sc, RF3000_DIVCTL, RF3000_DIVCTL_ENABLE); 1493 1494 if (rc != 0) 1495 goto out; 1496 1497 /* sensible setting from a binary-only driver */ 1498 rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1499 LSHIFT(0x1d, RF3000_GAINCTL_TXVGC_MASK)); 1500 1501 if (rc != 0) 1502 goto out; 1503 1504 /* magic from a binary-only driver */ 1505 rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, 1506 LSHIFT(0x38, RF3000_LOGAINCAL_CAL_MASK)); 1507 1508 if (rc != 0) 1509 goto out; 1510 1511 rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, RF3000_HIGAINCAL_DSSSPAD); 1512 1513 if (rc != 0) 1514 goto out; 1515 1516 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, 0x0); 1517 1518 if (rc != 0) 1519 goto out; 1520 1521 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, RF3000_OPTIONS2_LNAGS_DELAY); 1522 1523 if (rc != 0) 1524 goto out; 1525 1526 /* CCA is acquisition sensitive */ 1527 rc = atw_rf3000_write(sc, RF3000_CCACTL, 1528 LSHIFT(RF3000_CCACTL_MODE_ACQ, RF3000_CCACTL_MODE_MASK)); 1529 1530 if (rc != 0) 1531 goto out; 1532 1533 out: 1534 atw_rfio_enable(sc, 0); 1535 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1536 return rc; 1537 } 1538 1539 #ifdef ATW_DEBUG 1540 static void 1541 atw_rf3000_print(sc) 1542 struct atw_softc *sc; 1543 { 1544 struct ifnet *ifp = &sc->sc_ic.ic_if; 1545 u_int addr, val; 1546 1547 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1548 return; 1549 1550 for (addr = 0x01; addr <= 0x15; addr++) { 1551 printf("%s: bbp[%d] = \n", sc->sc_dev.dv_xname, addr); 1552 if (atw_rf3000_read(sc, addr, &val) != 0) { 1553 printf("<unknown> (quitting print-out)\n"); 1554 break; 1555 } 1556 printf("%08x\n", val); 1557 } 1558 } 1559 #endif /* ATW_DEBUG */ 1560 1561 /* Set the power settings on the BBP for channel `chan'. */ 1562 static int 1563 atw_rf3000_tune(sc, chan) 1564 struct atw_softc *sc; 1565 u_int8_t chan; 1566 { 1567 int rc = 0; 1568 u_int32_t reg; 1569 u_int16_t txpower, lpf_cutoff, lna_gs_thresh; 1570 1571 txpower = sc->sc_srom[ATW_SR_TXPOWER(chan)]; 1572 lpf_cutoff = sc->sc_srom[ATW_SR_LPF_CUTOFF(chan)]; 1573 lna_gs_thresh = sc->sc_srom[ATW_SR_LNA_GS_THRESH(chan)]; 1574 1575 /* odd channels: LSB, even channels: MSB */ 1576 if (chan % 2 == 1) { 1577 txpower &= 0xFF; 1578 lpf_cutoff &= 0xFF; 1579 lna_gs_thresh &= 0xFF; 1580 } else { 1581 txpower >>= 8; 1582 lpf_cutoff >>= 8; 1583 lna_gs_thresh >>= 8; 1584 } 1585 1586 #ifdef ATW_DEBUG 1587 atw_rf3000_print(sc); 1588 #endif /* ATW_DEBUG */ 1589 1590 DPRINTF(sc, ("%s: chan %d txpower %02x, lpf_cutoff %02x, " 1591 "lna_gs_thresh %02x\n", 1592 sc->sc_dev.dv_xname, chan, txpower, lpf_cutoff, lna_gs_thresh)); 1593 1594 atw_rfio_enable(sc, 1); 1595 1596 if ((rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1597 LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK))) != 0) 1598 goto out; 1599 1600 if ((rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, lpf_cutoff)) != 0) 1601 goto out; 1602 1603 if ((rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, lna_gs_thresh)) != 0) 1604 goto out; 1605 1606 /* from a binary-only driver. */ 1607 reg = ATW_READ(sc, ATW_PLCPHD); 1608 reg &= ~ATW_PLCPHD_SERVICE_MASK; 1609 reg |= LSHIFT(txpower << 2, ATW_PLCPHD_SERVICE_MASK); 1610 ATW_WRITE(sc, ATW_PLCPHD, reg); 1611 1612 #ifdef ATW_DEBUG 1613 atw_rf3000_print(sc); 1614 #endif /* ATW_DEBUG */ 1615 1616 out: 1617 atw_rfio_enable(sc, 0); 1618 1619 return rc; 1620 } 1621 1622 /* Write a register on the RF3000 baseband processor using the 1623 * registers provided by the ADM8211 for this purpose. 1624 * 1625 * Return 0 on success. 1626 */ 1627 static int 1628 atw_rf3000_write(sc, addr, val) 1629 struct atw_softc *sc; 1630 u_int addr, val; 1631 { 1632 u_int32_t reg; 1633 int i; 1634 1635 for (i = 1000; --i >= 0; ) { 1636 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1637 break; 1638 DELAY(100); 1639 } 1640 1641 if (i < 0) { 1642 printf("%s: BBPCTL busy (pre-write)\n", sc->sc_dev.dv_xname); 1643 return ETIMEDOUT; 1644 } 1645 1646 reg = sc->sc_bbpctl_wr | 1647 LSHIFT(val & 0xff, ATW_BBPCTL_DATA_MASK) | 1648 LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1649 1650 ATW_WRITE(sc, ATW_BBPCTL, reg); 1651 1652 for (i = 1000; --i >= 0; ) { 1653 DELAY(100); 1654 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_WR) == 0) 1655 break; 1656 } 1657 1658 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_WR); 1659 1660 if (i < 0) { 1661 printf("%s: BBPCTL busy (post-write)\n", sc->sc_dev.dv_xname); 1662 return ETIMEDOUT; 1663 } 1664 return 0; 1665 } 1666 1667 /* Read a register on the RF3000 baseband processor using the registers 1668 * the ADM8211 provides for this purpose. 1669 * 1670 * The 7-bit register address is addr. Record the 8-bit data in the register 1671 * in *val. 1672 * 1673 * Return 0 on success. 1674 * 1675 * XXX This does not seem to work. The ADM8211 must require more or 1676 * different magic to read the chip than to write it. Possibly some 1677 * of the magic I have derived from a binary-only driver concerns 1678 * the "chip address" (see the RF3000 manual). 1679 */ 1680 #ifdef ATW_DEBUG 1681 static int 1682 atw_rf3000_read(sc, addr, val) 1683 struct atw_softc *sc; 1684 u_int addr, *val; 1685 { 1686 u_int32_t reg; 1687 int i; 1688 1689 for (i = 1000; --i >= 0; ) { 1690 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1691 break; 1692 DELAY(100); 1693 } 1694 1695 if (i < 0) { 1696 printf("%s: start atw_rf3000_read, BBPCTL busy\n", 1697 sc->sc_dev.dv_xname); 1698 return ETIMEDOUT; 1699 } 1700 1701 reg = sc->sc_bbpctl_rd | LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1702 1703 ATW_WRITE(sc, ATW_BBPCTL, reg); 1704 1705 for (i = 1000; --i >= 0; ) { 1706 DELAY(100); 1707 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD) == 0) 1708 break; 1709 } 1710 1711 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_RD); 1712 1713 if (i < 0) { 1714 printf("%s: atw_rf3000_read wrote %08x; BBPCTL still busy\n", 1715 sc->sc_dev.dv_xname, reg); 1716 return ETIMEDOUT; 1717 } 1718 if (val != NULL) 1719 *val = MASK_AND_RSHIFT(reg, ATW_BBPCTL_DATA_MASK); 1720 return 0; 1721 } 1722 #endif /* ATW_DEBUG */ 1723 1724 /* Write a register on the Si4126 RF/IF synthesizer using the registers 1725 * provided by the ADM8211 for that purpose. 1726 * 1727 * val is 18 bits of data, and val is the 4-bit address of the register. 1728 * 1729 * Return 0 on success. 1730 */ 1731 static int 1732 atw_si4126_write(sc, addr, val) 1733 struct atw_softc *sc; 1734 u_int addr, val; 1735 { 1736 u_int32_t reg; 1737 int i; 1738 1739 for (i = 1000; --i >= 0; ) { 1740 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1741 break; 1742 DELAY(100); 1743 } 1744 1745 if (i < 0) { 1746 printf("%s: start atw_si4126_write, SYNCTL busy\n", 1747 sc->sc_dev.dv_xname); 1748 return ETIMEDOUT; 1749 } 1750 1751 reg = sc->sc_synctl_wr | 1752 LSHIFT(((val & 0x3ffff) << 4) | (addr & 0xf), ATW_SYNCTL_DATA_MASK); 1753 1754 ATW_WRITE(sc, ATW_SYNCTL, reg); 1755 1756 for (i = 1000; --i >= 0; ) { 1757 DELAY(100); 1758 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_WR) == 0) 1759 break; 1760 } 1761 1762 /* restore to acceptable starting condition */ 1763 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_WR); 1764 1765 if (i < 0) { 1766 printf("%s: atw_si4126_write wrote %08x, SYNCTL still busy\n", 1767 sc->sc_dev.dv_xname, reg); 1768 return ETIMEDOUT; 1769 } 1770 return 0; 1771 } 1772 1773 /* Read 18-bit data from the 4-bit address addr in Si4126 1774 * RF synthesizer and write the data to *val. Return 0 on success. 1775 * 1776 * XXX This does not seem to work. The ADM8211 must require more or 1777 * different magic to read the chip than to write it. 1778 */ 1779 #ifdef ATW_DEBUG 1780 static int 1781 atw_si4126_read(sc, addr, val) 1782 struct atw_softc *sc; 1783 u_int addr; 1784 u_int *val; 1785 { 1786 u_int32_t reg; 1787 int i; 1788 1789 for (i = 1000; --i >= 0; ) { 1790 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1791 break; 1792 DELAY(100); 1793 } 1794 1795 if (i < 0) { 1796 printf("%s: start atw_si4126_read, SYNCTL busy\n", 1797 sc->sc_dev.dv_xname); 1798 return ETIMEDOUT; 1799 } 1800 1801 reg = sc->sc_synctl_rd | LSHIFT(addr & 0xf, ATW_SYNCTL_DATA_MASK); 1802 1803 ATW_WRITE(sc, ATW_SYNCTL, reg); 1804 1805 for (i = 1000; --i >= 0; ) { 1806 DELAY(100); 1807 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0) 1808 break; 1809 } 1810 1811 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD); 1812 1813 if (i < 0) { 1814 printf("%s: atw_si4126_read wrote %08x, SYNCTL still busy\n", 1815 sc->sc_dev.dv_xname, reg); 1816 return ETIMEDOUT; 1817 } 1818 if (val != NULL) 1819 *val = MASK_AND_RSHIFT(ATW_READ(sc, ATW_SYNCTL), 1820 ATW_SYNCTL_DATA_MASK); 1821 return 0; 1822 } 1823 #endif /* ATW_DEBUG */ 1824 1825 /* XXX is the endianness correct? test. */ 1826 #define atw_calchash(addr) \ 1827 (ether_crc32_le((addr), IEEE80211_ADDR_LEN) & BITS(5, 0)) 1828 1829 /* 1830 * atw_filter_setup: 1831 * 1832 * Set the ADM8211's receive filter. 1833 */ 1834 static void 1835 atw_filter_setup(sc) 1836 struct atw_softc *sc; 1837 { 1838 struct ieee80211com *ic = &sc->sc_ic; 1839 struct ethercom *ec = &ic->ic_ec; 1840 struct ifnet *ifp = &sc->sc_ic.ic_if; 1841 int hash; 1842 u_int32_t hashes[2] = { 0, 0 }; 1843 struct ether_multi *enm; 1844 struct ether_multistep step; 1845 1846 DPRINTF(sc, ("%s: atw_filter_setup: sc_flags 0x%08x\n", 1847 sc->sc_dev.dv_xname, sc->sc_flags)); 1848 1849 /* 1850 * If we're running, idle the receive engine. If we're NOT running, 1851 * we're being called from atw_init(), and our writing ATW_NAR will 1852 * start the transmit and receive processes in motion. 1853 */ 1854 if (ifp->if_flags & IFF_RUNNING) 1855 atw_idle(sc, ATW_NAR_SR); 1856 1857 sc->sc_opmode &= ~(ATW_NAR_PR|ATW_NAR_MM); 1858 1859 ifp->if_flags &= ~IFF_ALLMULTI; 1860 1861 if (ifp->if_flags & IFF_PROMISC) { 1862 sc->sc_opmode |= ATW_NAR_PR; 1863 allmulti: 1864 ifp->if_flags |= IFF_ALLMULTI; 1865 goto setit; 1866 } 1867 1868 /* 1869 * Program the 64-bit multicast hash filter. 1870 */ 1871 ETHER_FIRST_MULTI(step, ec, enm); 1872 while (enm != NULL) { 1873 /* XXX */ 1874 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 1875 ETHER_ADDR_LEN) != 0) 1876 goto allmulti; 1877 1878 hash = atw_calchash(enm->enm_addrlo); 1879 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1880 ETHER_NEXT_MULTI(step, enm); 1881 } 1882 1883 if (ifp->if_flags & IFF_BROADCAST) { 1884 hash = atw_calchash(etherbroadcastaddr); 1885 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1886 } 1887 1888 /* all bits set => hash is useless */ 1889 if (~(hashes[0] & hashes[1]) == 0) 1890 goto allmulti; 1891 1892 setit: 1893 if (ifp->if_flags & IFF_ALLMULTI) 1894 sc->sc_opmode |= ATW_NAR_MM; 1895 1896 /* XXX in scan mode, do not filter packets. maybe this is 1897 * unnecessary. 1898 */ 1899 if (ic->ic_state == IEEE80211_S_SCAN) 1900 sc->sc_opmode |= ATW_NAR_PR; 1901 1902 ATW_WRITE(sc, ATW_MAR0, hashes[0]); 1903 ATW_WRITE(sc, ATW_MAR1, hashes[1]); 1904 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1905 DPRINTF(sc, ("%s: ATW_NAR %08x opmode %08x\n", sc->sc_dev.dv_xname, 1906 ATW_READ(sc, ATW_NAR), sc->sc_opmode)); 1907 1908 DPRINTF(sc, ("%s: atw_filter_setup: returning\n", sc->sc_dev.dv_xname)); 1909 } 1910 1911 /* Tell the ADM8211 our preferred BSSID. The ADM8211 must match 1912 * a beacon's BSSID and SSID against the preferred BSSID and SSID 1913 * before it will raise ATW_INTR_LINKON. When the ADM8211 receives 1914 * no beacon with the preferred BSSID and SSID in the number of 1915 * beacon intervals given in ATW_BPLI, then it raises ATW_INTR_LINKOFF. 1916 */ 1917 static void 1918 atw_write_bssid(sc) 1919 struct atw_softc *sc; 1920 { 1921 struct ieee80211com *ic = &sc->sc_ic; 1922 u_int8_t *bssid; 1923 1924 bssid = ic->ic_bss->ni_bssid; 1925 1926 ATW_WRITE(sc, ATW_ABDA1, 1927 (ATW_READ(sc, ATW_ABDA1) & 1928 ~(ATW_ABDA1_BSSIDB4_MASK|ATW_ABDA1_BSSIDB5_MASK)) | 1929 LSHIFT(bssid[4], ATW_ABDA1_BSSIDB4_MASK) | 1930 LSHIFT(bssid[5], ATW_ABDA1_BSSIDB5_MASK)); 1931 1932 ATW_WRITE(sc, ATW_BSSID0, 1933 LSHIFT(bssid[0], ATW_BSSID0_BSSIDB0_MASK) | 1934 LSHIFT(bssid[1], ATW_BSSID0_BSSIDB1_MASK) | 1935 LSHIFT(bssid[2], ATW_BSSID0_BSSIDB2_MASK) | 1936 LSHIFT(bssid[3], ATW_BSSID0_BSSIDB3_MASK)); 1937 1938 DPRINTF(sc, ("%s: BSSID %s -> ", sc->sc_dev.dv_xname, 1939 ether_sprintf(sc->sc_bssid))); 1940 DPRINTF(sc, ("%s\n", ether_sprintf(bssid))); 1941 1942 memcpy(sc->sc_bssid, bssid, sizeof(sc->sc_bssid)); 1943 } 1944 1945 /* Tell the ADM8211 how many beacon intervals must pass without 1946 * receiving a beacon with the preferred BSSID & SSID set by 1947 * atw_write_bssid and atw_write_ssid before ATW_INTR_LINKOFF 1948 * raised. 1949 */ 1950 static void 1951 atw_write_bcn_thresh(sc) 1952 struct atw_softc *sc; 1953 { 1954 struct ieee80211com *ic = &sc->sc_ic; 1955 int lost_bcn_thresh; 1956 1957 /* Lose link after one second or 7 beacons, whichever comes 1958 * first, but do not lose link before 2 beacons are lost. 1959 * 1960 * In host AP mode, set the lost-beacon threshold to 0. 1961 */ 1962 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1963 lost_bcn_thresh = 0; 1964 else { 1965 int beacons_per_second = 1966 1000000 / (IEEE80211_DUR_TU * MAX(1,ic->ic_bss->ni_intval)); 1967 lost_bcn_thresh = MAX(2, MIN(7, beacons_per_second)); 1968 } 1969 1970 /* XXX resets wake-up status bits */ 1971 ATW_WRITE(sc, ATW_WCSR, 1972 (ATW_READ(sc, ATW_WCSR) & ~ATW_WCSR_BLN_MASK) | 1973 (LSHIFT(lost_bcn_thresh, ATW_WCSR_BLN_MASK) & ATW_WCSR_BLN_MASK)); 1974 1975 DPRINTF(sc, ("%s: lost-beacon threshold %d -> %d\n", 1976 sc->sc_dev.dv_xname, sc->sc_lost_bcn_thresh, lost_bcn_thresh)); 1977 1978 sc->sc_lost_bcn_thresh = lost_bcn_thresh; 1979 1980 DPRINTF(sc, ("%s: atw_write_bcn_thresh reg[WCSR] = %08x\n", 1981 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_WCSR))); 1982 } 1983 1984 /* Write buflen bytes from buf to SRAM starting at the SRAM's ofs'th 1985 * 16-bit word. 1986 */ 1987 static void 1988 atw_write_sram(sc, ofs, buf, buflen) 1989 struct atw_softc *sc; 1990 u_int ofs; 1991 u_int8_t *buf; 1992 u_int buflen; 1993 { 1994 u_int i; 1995 u_int8_t *ptr; 1996 1997 memcpy(&sc->sc_sram[ofs], buf, buflen); 1998 1999 if (ofs % 2 != 0) { 2000 ofs--; 2001 buflen++; 2002 } 2003 2004 if (buflen % 2 != 0) 2005 buflen++; 2006 2007 assert(buflen + ofs <= ATW_SRAM_SIZE); 2008 2009 ptr = &sc->sc_sram[ofs]; 2010 2011 for (i = 0; i < buflen; i += 2) { 2012 ATW_WRITE(sc, ATW_WEPCTL, ATW_WEPCTL_WR | 2013 LSHIFT((ofs + i) / 2, ATW_WEPCTL_TBLADD_MASK)); 2014 DELAY(atw_writewep_delay); 2015 2016 ATW_WRITE(sc, ATW_WESK, 2017 LSHIFT((ptr[i + 1] << 8) | ptr[i], ATW_WESK_DATA_MASK)); 2018 DELAY(atw_writewep_delay); 2019 } 2020 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); /* restore WEP condition */ 2021 2022 if (sc->sc_if.if_flags & IFF_DEBUG) { 2023 int n_octets = 0; 2024 printf("%s: wrote %d bytes at 0x%x wepctl 0x%08x\n", 2025 sc->sc_dev.dv_xname, buflen, ofs, sc->sc_wepctl); 2026 for (i = 0; i < buflen; i++) { 2027 printf(" %02x", ptr[i]); 2028 if (++n_octets % 24 == 0) 2029 printf("\n"); 2030 } 2031 if (n_octets % 24 != 0) 2032 printf("\n"); 2033 } 2034 } 2035 2036 /* Write WEP keys from the ieee80211com to the ADM8211's SRAM. */ 2037 static void 2038 atw_write_wep(sc) 2039 struct atw_softc *sc; 2040 { 2041 struct ieee80211com *ic = &sc->sc_ic; 2042 /* SRAM shared-key record format: key0 flags key1 ... key12 */ 2043 u_int8_t buf[IEEE80211_WEP_NKID] 2044 [1 /* key[0] */ + 1 /* flags */ + 12 /* key[1 .. 12] */]; 2045 u_int32_t reg; 2046 int i; 2047 2048 sc->sc_wepctl = 0; 2049 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); 2050 2051 if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) 2052 return; 2053 2054 memset(&buf[0][0], 0, sizeof(buf)); 2055 2056 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 2057 if (ic->ic_nw_keys[i].wk_len > 5) { 2058 buf[i][1] = ATW_WEP_ENABLED | ATW_WEP_104BIT; 2059 } else if (ic->ic_nw_keys[i].wk_len != 0) { 2060 buf[i][1] = ATW_WEP_ENABLED; 2061 } else { 2062 buf[i][1] = 0; 2063 continue; 2064 } 2065 buf[i][0] = ic->ic_nw_keys[i].wk_key[0]; 2066 memcpy(&buf[i][2], &ic->ic_nw_keys[i].wk_key[1], 2067 ic->ic_nw_keys[i].wk_len - 1); 2068 } 2069 2070 reg = ATW_READ(sc, ATW_MACTEST); 2071 reg |= ATW_MACTEST_MMI_USETXCLK | ATW_MACTEST_FORCE_KEYID; 2072 reg &= ~ATW_MACTEST_KEYID_MASK; 2073 reg |= LSHIFT(ic->ic_wep_txkey, ATW_MACTEST_KEYID_MASK); 2074 ATW_WRITE(sc, ATW_MACTEST, reg); 2075 2076 /* RX bypass WEP if revision != 0x20. (I assume revision != 0x20 2077 * throughout.) 2078 */ 2079 sc->sc_wepctl = ATW_WEPCTL_WEPENABLE | ATW_WEPCTL_WEPRXBYP; 2080 if (sc->sc_if.if_flags & IFF_LINK2) 2081 sc->sc_wepctl &= ~ATW_WEPCTL_WEPRXBYP; 2082 2083 atw_write_sram(sc, ATW_SRAM_ADDR_SHARED_KEY, (u_int8_t*)&buf[0][0], 2084 sizeof(buf)); 2085 } 2086 2087 const struct timeval atw_beacon_mininterval = {1, 0}; /* 1s */ 2088 2089 static void 2090 atw_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2091 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2092 { 2093 struct atw_softc *sc = (struct atw_softc*)ic->ic_softc; 2094 2095 switch (subtype) { 2096 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2097 /* do nothing: hardware answers probe request */ 2098 break; 2099 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2100 case IEEE80211_FC0_SUBTYPE_BEACON: 2101 atw_recv_beacon(ic, m, ni, subtype, rssi, rstamp); 2102 break; 2103 default: 2104 (*sc->sc_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 2105 break; 2106 } 2107 return; 2108 } 2109 2110 /* In ad hoc mode, atw_recv_beacon is responsible for the coalescence 2111 * of IBSSs with like SSID/channel but different BSSID. It joins the 2112 * oldest IBSS (i.e., with greatest TSF time), since that is the WECA 2113 * convention. Possibly the ADMtek chip does this for us; I will have 2114 * to test to find out. 2115 * 2116 * XXX we should add the duration field of the received beacon to 2117 * the TSF time it contains before comparing it with the ADM8211's 2118 * TSF. 2119 */ 2120 static void 2121 atw_recv_beacon(struct ieee80211com *ic, struct mbuf *m0, 2122 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2123 { 2124 struct atw_softc *sc; 2125 struct ieee80211_frame *wh; 2126 u_int64_t tsft, bcn_tsft; 2127 u_int32_t tsftl, tsfth; 2128 int do_print = 0; 2129 2130 sc = (struct atw_softc*)ic->ic_if.if_softc; 2131 2132 if (ic->ic_if.if_flags & IFF_DEBUG) 2133 do_print = (ic->ic_if.if_flags & IFF_LINK0) 2134 ? 1 : ratecheck(&sc->sc_last_beacon, &atw_beacon_mininterval); 2135 2136 wh = mtod(m0, struct ieee80211_frame *); 2137 2138 (*sc->sc_recv_mgmt)(ic, m0, ni, subtype, rssi, rstamp); 2139 2140 if (ic->ic_state != IEEE80211_S_RUN) { 2141 if (do_print) 2142 printf("%s: atw_recv_beacon: not running\n", 2143 sc->sc_dev.dv_xname); 2144 return; 2145 } 2146 2147 if ((ni = ieee80211_lookup_node(ic, wh->i_addr2, 2148 ic->ic_bss->ni_chan)) == NULL) { 2149 if (do_print) 2150 printf("%s: atw_recv_beacon: no node %s\n", 2151 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2152 return; 2153 } 2154 2155 if (ieee80211_match_bss(ic, ni) != 0) { 2156 if (do_print) 2157 printf("%s: atw_recv_beacon: ssid mismatch %s\n", 2158 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2159 return; 2160 } 2161 2162 if (memcmp(ni->ni_bssid, ic->ic_bss->ni_bssid, IEEE80211_ADDR_LEN) == 0) 2163 return; 2164 2165 if (do_print) 2166 printf("%s: atw_recv_beacon: bssid mismatch %s\n", 2167 sc->sc_dev.dv_xname, ether_sprintf(ni->ni_bssid)); 2168 2169 if (ic->ic_opmode != IEEE80211_M_IBSS) 2170 return; 2171 2172 /* If we read TSFTL right before rollover, we read a TSF timer 2173 * that is too high rather than too low. This prevents a spurious 2174 * synchronization down the line, however, our IBSS could suffer 2175 * from a creeping TSF.... 2176 */ 2177 tsftl = ATW_READ(sc, ATW_TSFTL); 2178 tsfth = ATW_READ(sc, ATW_TSFTH); 2179 2180 tsft = (u_int64_t)tsfth << 32 | tsftl; 2181 bcn_tsft = le64toh(*(u_int64_t*)ni->ni_tstamp); 2182 2183 if (do_print) 2184 printf("%s: my tsft %" PRIu64 " beacon tsft %" PRIu64 "\n", 2185 sc->sc_dev.dv_xname, tsft, bcn_tsft); 2186 2187 /* we are faster, let the other guy catch up */ 2188 if (bcn_tsft < tsft) 2189 return; 2190 2191 if (do_print) 2192 printf("%s: sync TSF with %s\n", sc->sc_dev.dv_xname, 2193 ether_sprintf(wh->i_addr2)); 2194 2195 ic->ic_flags &= ~IEEE80211_F_SIBSS; 2196 2197 #if 0 2198 atw_tsf(sc); 2199 #endif 2200 2201 /* negotiate rates with new IBSS */ 2202 ieee80211_fix_rate(ic, ni, IEEE80211_F_DOFRATE | 2203 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2204 if (ni->ni_rates.rs_nrates == 0) { 2205 printf("%s: rates mismatch, BSSID %s\n", sc->sc_dev.dv_xname, 2206 ether_sprintf(ni->ni_bssid)); 2207 return; 2208 } 2209 2210 if (do_print) { 2211 printf("%s: sync BSSID %s -> ", sc->sc_dev.dv_xname, 2212 ether_sprintf(ic->ic_bss->ni_bssid)); 2213 printf("%s ", ether_sprintf(ni->ni_bssid)); 2214 printf("(from %s)\n", ether_sprintf(wh->i_addr2)); 2215 } 2216 2217 (*ic->ic_node_copy)(ic, ic->ic_bss, ni); 2218 2219 atw_write_bssid(sc); 2220 atw_write_bcn_thresh(sc); 2221 atw_start_beacon(sc, 1); 2222 } 2223 2224 /* Write the SSID in the ieee80211com to the SRAM on the ADM8211. 2225 * In ad hoc mode, the SSID is written to the beacons sent by the 2226 * ADM8211. In both ad hoc and infrastructure mode, beacons received 2227 * with matching SSID affect ATW_INTR_LINKON/ATW_INTR_LINKOFF 2228 * indications. 2229 */ 2230 static void 2231 atw_write_ssid(sc) 2232 struct atw_softc *sc; 2233 { 2234 struct ieee80211com *ic = &sc->sc_ic; 2235 /* 34 bytes are reserved in ADM8211 SRAM for the SSID */ 2236 u_int8_t buf[roundup(1 /* length */ + IEEE80211_NWID_LEN, 2)]; 2237 2238 memset(buf, 0, sizeof(buf)); 2239 buf[0] = ic->ic_bss->ni_esslen; 2240 memcpy(&buf[1], ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen); 2241 2242 atw_write_sram(sc, ATW_SRAM_ADDR_SSID, buf, sizeof(buf)); 2243 } 2244 2245 /* Write the supported rates in the ieee80211com to the SRAM of the ADM8211. 2246 * In ad hoc mode, the supported rates are written to beacons sent by the 2247 * ADM8211. 2248 */ 2249 static void 2250 atw_write_sup_rates(sc) 2251 struct atw_softc *sc; 2252 { 2253 struct ieee80211com *ic = &sc->sc_ic; 2254 /* 14 bytes are probably (XXX) reserved in the ADM8211 SRAM for 2255 * supported rates 2256 */ 2257 u_int8_t buf[roundup(1 /* length */ + IEEE80211_RATE_SIZE, 2)]; 2258 2259 memset(buf, 0, sizeof(buf)); 2260 2261 buf[0] = ic->ic_bss->ni_rates.rs_nrates; 2262 2263 memcpy(&buf[1], ic->ic_bss->ni_rates.rs_rates, 2264 ic->ic_bss->ni_rates.rs_nrates); 2265 2266 atw_write_sram(sc, ATW_SRAM_ADDR_SUPRATES, buf, sizeof(buf)); 2267 } 2268 2269 /* Start/stop sending beacons. */ 2270 void 2271 atw_start_beacon(struct atw_softc *sc, int start) 2272 { 2273 struct ieee80211com *ic = &sc->sc_ic; 2274 u_int32_t len, capinfo, reg_bcnt, reg_cap1; 2275 2276 if (ATW_IS_ENABLED(sc) == 0) 2277 return; 2278 2279 len = capinfo = 0; 2280 2281 /* start beacons */ 2282 len = sizeof(struct ieee80211_frame) + 2283 8 /* timestamp */ + 2 /* beacon interval */ + 2284 2 /* capability info */ + 2285 2 + ic->ic_bss->ni_esslen /* SSID element */ + 2286 2 + ic->ic_bss->ni_rates.rs_nrates /* rates element */ + 2287 3 /* DS parameters */ + 2288 IEEE80211_CRC_LEN; 2289 2290 reg_bcnt = ATW_READ(sc, ATW_BCNT) & ~ATW_BCNT_BCNT_MASK; 2291 2292 reg_cap1 = ATW_READ(sc, ATW_CAP1) & ~ATW_CAP1_CAPI_MASK; 2293 2294 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2295 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2296 2297 if (!start) 2298 return; 2299 2300 /* TBD use ni_capinfo */ 2301 2302 if (sc->sc_flags & ATWF_SHORT_PREAMBLE) 2303 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2304 if (ic->ic_flags & IEEE80211_F_WEPON) 2305 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2306 2307 switch (ic->ic_opmode) { 2308 case IEEE80211_M_IBSS: 2309 len += 4; /* IBSS parameters */ 2310 capinfo |= IEEE80211_CAPINFO_IBSS; 2311 break; 2312 case IEEE80211_M_HOSTAP: 2313 /* XXX 6-byte minimum TIM */ 2314 len += atw_beacon_len_adjust; 2315 capinfo |= IEEE80211_CAPINFO_ESS; 2316 break; 2317 default: 2318 return; 2319 } 2320 2321 reg_bcnt |= LSHIFT(len, ATW_BCNT_BCNT_MASK); 2322 reg_cap1 |= LSHIFT(capinfo, ATW_CAP1_CAPI_MASK); 2323 2324 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2325 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2326 2327 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_BCNT] = %08x\n", 2328 sc->sc_dev.dv_xname, reg_bcnt)); 2329 2330 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_CAP1] = %08x\n", 2331 sc->sc_dev.dv_xname, reg_cap1)); 2332 } 2333 2334 /* First beacon was sent at time 0 microseconds, current time is 2335 * tsfth << 32 | tsftl microseconds, and beacon interval is tbtt 2336 * microseconds. Return the expected time in microseconds for the 2337 * beacon after next. 2338 */ 2339 static __inline u_int64_t 2340 atw_predict_beacon(u_int64_t tsft, u_int32_t tbtt) 2341 { 2342 return tsft + (tbtt - tsft % tbtt); 2343 } 2344 2345 /* If we've created an IBSS, write the TSF time in the ADM8211 to 2346 * the ieee80211com. 2347 * 2348 * Predict the next target beacon transmission time (TBTT) and 2349 * write it to the ADM8211. 2350 */ 2351 static void 2352 atw_tsf(struct atw_softc *sc) 2353 { 2354 #define TBTTOFS 20 /* TU */ 2355 2356 struct ieee80211com *ic = &sc->sc_ic; 2357 u_int64_t tsft, tbtt; 2358 2359 if ((ic->ic_opmode == IEEE80211_M_HOSTAP) || 2360 ((ic->ic_opmode == IEEE80211_M_IBSS) && 2361 (ic->ic_flags & IEEE80211_F_SIBSS))) { 2362 tsft = ATW_READ(sc, ATW_TSFTH); 2363 tsft <<= 32; 2364 tsft |= ATW_READ(sc, ATW_TSFTL); 2365 *(u_int64_t*)&ic->ic_bss->ni_tstamp[0] = htole64(tsft); 2366 } else 2367 tsft = le64toh(*(u_int64_t*)&ic->ic_bss->ni_tstamp[0]); 2368 2369 tbtt = atw_predict_beacon(tsft, 2370 ic->ic_bss->ni_intval * IEEE80211_DUR_TU); 2371 2372 /* skip one more beacon so that the TBTT cannot pass before 2373 * we've programmed it, and also so that we can subtract a 2374 * few TU so that we wake a little before TBTT. 2375 */ 2376 tbtt += ic->ic_bss->ni_intval * IEEE80211_DUR_TU; 2377 2378 /* wake up a little early */ 2379 tbtt -= TBTTOFS * IEEE80211_DUR_TU; 2380 2381 DPRINTF(sc, ("%s: tsft %" PRIu64 " tbtt %" PRIu64 "\n", 2382 sc->sc_dev.dv_xname, tsft, tbtt)); 2383 2384 ATW_WRITE(sc, ATW_TOFS1, 2385 LSHIFT(1, ATW_TOFS1_TSFTOFSR_MASK) | 2386 LSHIFT(TBTTOFS, ATW_TOFS1_TBTTOFS_MASK) | 2387 LSHIFT( 2388 MASK_AND_RSHIFT((u_int32_t)tbtt, BITS(25, 10)), 2389 ATW_TOFS1_TBTTPRE_MASK)); 2390 #undef TBTTOFS 2391 } 2392 2393 static void 2394 atw_next_scan(void *arg) 2395 { 2396 struct atw_softc *sc = arg; 2397 struct ieee80211com *ic = &sc->sc_ic; 2398 struct ifnet *ifp = &ic->ic_if; 2399 int s; 2400 2401 /* don't call atw_start w/o network interrupts blocked */ 2402 s = splnet(); 2403 if (ic->ic_state == IEEE80211_S_SCAN) 2404 ieee80211_next_scan(ifp); 2405 splx(s); 2406 } 2407 2408 /* Synchronize the hardware state with the software state. */ 2409 static int 2410 atw_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 2411 { 2412 struct ifnet *ifp = &ic->ic_if; 2413 struct atw_softc *sc = ifp->if_softc; 2414 enum ieee80211_state ostate; 2415 int error; 2416 2417 ostate = ic->ic_state; 2418 2419 if (nstate == IEEE80211_S_INIT) { 2420 callout_stop(&sc->sc_scan_ch); 2421 sc->sc_cur_chan = IEEE80211_CHAN_ANY; 2422 atw_start_beacon(sc, 0); 2423 return (*sc->sc_newstate)(ic, nstate, arg); 2424 } 2425 2426 if ((error = atw_tune(sc)) != 0) 2427 return error; 2428 2429 switch (nstate) { 2430 case IEEE80211_S_ASSOC: 2431 break; 2432 case IEEE80211_S_INIT: 2433 panic("%s: unexpected state IEEE80211_S_INIT\n", __func__); 2434 break; 2435 case IEEE80211_S_SCAN: 2436 memset(sc->sc_bssid, 0, IEEE80211_ADDR_LEN); 2437 atw_write_bssid(sc); 2438 2439 callout_reset(&sc->sc_scan_ch, atw_dwelltime * hz / 1000, 2440 atw_next_scan, sc); 2441 2442 break; 2443 case IEEE80211_S_RUN: 2444 if (ic->ic_opmode == IEEE80211_M_STA) 2445 break; 2446 /*FALLTHROUGH*/ 2447 case IEEE80211_S_AUTH: 2448 atw_write_bssid(sc); 2449 atw_write_bcn_thresh(sc); 2450 atw_write_ssid(sc); 2451 atw_write_sup_rates(sc); 2452 2453 if (ic->ic_opmode == IEEE80211_M_AHDEMO || 2454 ic->ic_opmode == IEEE80211_M_MONITOR) 2455 break; 2456 2457 /* set listen interval 2458 * XXX do software units agree w/ hardware? 2459 */ 2460 ATW_WRITE(sc, ATW_BPLI, 2461 LSHIFT(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2462 LSHIFT(ic->ic_lintval / ic->ic_bss->ni_intval, 2463 ATW_BPLI_LI_MASK)); 2464 2465 DPRINTF(sc, ("%s: reg[ATW_BPLI] = %08x\n", 2466 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_BPLI))); 2467 2468 atw_tsf(sc); 2469 break; 2470 } 2471 2472 if (nstate != IEEE80211_S_SCAN) 2473 callout_stop(&sc->sc_scan_ch); 2474 2475 if (nstate == IEEE80211_S_RUN && 2476 (ic->ic_opmode == IEEE80211_M_HOSTAP || 2477 ic->ic_opmode == IEEE80211_M_IBSS)) 2478 atw_start_beacon(sc, 1); 2479 else 2480 atw_start_beacon(sc, 0); 2481 2482 return (*sc->sc_newstate)(ic, nstate, arg); 2483 } 2484 2485 /* 2486 * atw_add_rxbuf: 2487 * 2488 * Add a receive buffer to the indicated descriptor. 2489 */ 2490 int 2491 atw_add_rxbuf(sc, idx) 2492 struct atw_softc *sc; 2493 int idx; 2494 { 2495 struct atw_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2496 struct mbuf *m; 2497 int error; 2498 2499 MGETHDR(m, M_DONTWAIT, MT_DATA); 2500 if (m == NULL) 2501 return (ENOBUFS); 2502 2503 MCLGET(m, M_DONTWAIT); 2504 if ((m->m_flags & M_EXT) == 0) { 2505 m_freem(m); 2506 return (ENOBUFS); 2507 } 2508 2509 if (rxs->rxs_mbuf != NULL) 2510 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2511 2512 rxs->rxs_mbuf = m; 2513 2514 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 2515 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 2516 BUS_DMA_READ|BUS_DMA_NOWAIT); 2517 if (error) { 2518 printf("%s: can't load rx DMA map %d, error = %d\n", 2519 sc->sc_dev.dv_xname, idx, error); 2520 panic("atw_add_rxbuf"); /* XXX */ 2521 } 2522 2523 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2524 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2525 2526 ATW_INIT_RXDESC(sc, idx); 2527 2528 return (0); 2529 } 2530 2531 /* 2532 * atw_stop: [ ifnet interface function ] 2533 * 2534 * Stop transmission on the interface. 2535 */ 2536 void 2537 atw_stop(ifp, disable) 2538 struct ifnet *ifp; 2539 int disable; 2540 { 2541 struct atw_softc *sc = ifp->if_softc; 2542 struct ieee80211com *ic = &sc->sc_ic; 2543 struct atw_txsoft *txs; 2544 2545 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2546 2547 /* Disable interrupts. */ 2548 ATW_WRITE(sc, ATW_IER, 0); 2549 2550 /* Stop the transmit and receive processes. */ 2551 sc->sc_opmode = 0; 2552 ATW_WRITE(sc, ATW_NAR, 0); 2553 ATW_WRITE(sc, ATW_TDBD, 0); 2554 ATW_WRITE(sc, ATW_TDBP, 0); 2555 ATW_WRITE(sc, ATW_RDB, 0); 2556 2557 /* 2558 * Release any queued transmit buffers. 2559 */ 2560 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 2561 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 2562 if (txs->txs_mbuf != NULL) { 2563 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2564 m_freem(txs->txs_mbuf); 2565 txs->txs_mbuf = NULL; 2566 } 2567 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 2568 } 2569 2570 if (disable) { 2571 atw_rxdrain(sc); 2572 atw_disable(sc); 2573 } 2574 2575 /* 2576 * Mark the interface down and cancel the watchdog timer. 2577 */ 2578 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2579 ifp->if_timer = 0; 2580 2581 /* XXX */ 2582 atw_reset(sc); 2583 } 2584 2585 /* 2586 * atw_rxdrain: 2587 * 2588 * Drain the receive queue. 2589 */ 2590 void 2591 atw_rxdrain(sc) 2592 struct atw_softc *sc; 2593 { 2594 struct atw_rxsoft *rxs; 2595 int i; 2596 2597 for (i = 0; i < ATW_NRXDESC; i++) { 2598 rxs = &sc->sc_rxsoft[i]; 2599 if (rxs->rxs_mbuf == NULL) 2600 continue; 2601 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2602 m_freem(rxs->rxs_mbuf); 2603 rxs->rxs_mbuf = NULL; 2604 } 2605 } 2606 2607 /* 2608 * atw_detach: 2609 * 2610 * Detach an ADM8211 interface. 2611 */ 2612 int 2613 atw_detach(sc) 2614 struct atw_softc *sc; 2615 { 2616 struct ifnet *ifp = &sc->sc_ic.ic_if; 2617 struct atw_rxsoft *rxs; 2618 struct atw_txsoft *txs; 2619 int i; 2620 2621 /* 2622 * Succeed now if there isn't any work to do. 2623 */ 2624 if ((sc->sc_flags & ATWF_ATTACHED) == 0) 2625 return (0); 2626 2627 ieee80211_ifdetach(ifp); 2628 if_detach(ifp); 2629 2630 for (i = 0; i < ATW_NRXDESC; i++) { 2631 rxs = &sc->sc_rxsoft[i]; 2632 if (rxs->rxs_mbuf != NULL) { 2633 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2634 m_freem(rxs->rxs_mbuf); 2635 rxs->rxs_mbuf = NULL; 2636 } 2637 bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap); 2638 } 2639 for (i = 0; i < ATW_TXQUEUELEN; i++) { 2640 txs = &sc->sc_txsoft[i]; 2641 if (txs->txs_mbuf != NULL) { 2642 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2643 m_freem(txs->txs_mbuf); 2644 txs->txs_mbuf = NULL; 2645 } 2646 bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap); 2647 } 2648 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 2649 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 2650 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 2651 sizeof(struct atw_control_data)); 2652 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 2653 2654 shutdownhook_disestablish(sc->sc_sdhook); 2655 powerhook_disestablish(sc->sc_powerhook); 2656 2657 if (sc->sc_srom) 2658 free(sc->sc_srom, M_DEVBUF); 2659 2660 return (0); 2661 } 2662 2663 /* atw_shutdown: make sure the interface is stopped at reboot time. */ 2664 void 2665 atw_shutdown(arg) 2666 void *arg; 2667 { 2668 struct atw_softc *sc = arg; 2669 2670 atw_stop(&sc->sc_ic.ic_if, 1); 2671 } 2672 2673 int 2674 atw_intr(arg) 2675 void *arg; 2676 { 2677 struct atw_softc *sc = arg; 2678 struct ifnet *ifp = &sc->sc_ic.ic_if; 2679 u_int32_t status, rxstatus, txstatus, linkstatus; 2680 int handled = 0, txthresh; 2681 2682 #ifdef DEBUG 2683 if (ATW_IS_ENABLED(sc) == 0) 2684 panic("%s: atw_intr: not enabled", sc->sc_dev.dv_xname); 2685 #endif 2686 2687 /* 2688 * If the interface isn't running, the interrupt couldn't 2689 * possibly have come from us. 2690 */ 2691 if ((ifp->if_flags & IFF_RUNNING) == 0 || 2692 (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 2693 return (0); 2694 2695 for (;;) { 2696 status = ATW_READ(sc, ATW_STSR); 2697 2698 if (status) 2699 ATW_WRITE(sc, ATW_STSR, status); 2700 2701 if (sc->sc_intr_ack != NULL) 2702 (*sc->sc_intr_ack)(sc); 2703 2704 #ifdef ATW_DEBUG 2705 #define PRINTINTR(flag) do { \ 2706 if ((status & flag) != 0) { \ 2707 printf("%s" #flag, delim); \ 2708 delim = ","; \ 2709 } \ 2710 } while (0) 2711 2712 if (atw_debug > 1 && status) { 2713 const char *delim = "<"; 2714 2715 printf("%s: reg[STSR] = %x", 2716 sc->sc_dev.dv_xname, status); 2717 2718 PRINTINTR(ATW_INTR_FBE); 2719 PRINTINTR(ATW_INTR_LINKOFF); 2720 PRINTINTR(ATW_INTR_LINKON); 2721 PRINTINTR(ATW_INTR_RCI); 2722 PRINTINTR(ATW_INTR_RDU); 2723 PRINTINTR(ATW_INTR_REIS); 2724 PRINTINTR(ATW_INTR_RPS); 2725 PRINTINTR(ATW_INTR_TCI); 2726 PRINTINTR(ATW_INTR_TDU); 2727 PRINTINTR(ATW_INTR_TLT); 2728 PRINTINTR(ATW_INTR_TPS); 2729 PRINTINTR(ATW_INTR_TRT); 2730 PRINTINTR(ATW_INTR_TUF); 2731 PRINTINTR(ATW_INTR_BCNTC); 2732 PRINTINTR(ATW_INTR_ATIME); 2733 PRINTINTR(ATW_INTR_TBTT); 2734 PRINTINTR(ATW_INTR_TSCZ); 2735 PRINTINTR(ATW_INTR_TSFTF); 2736 printf(">\n"); 2737 } 2738 #undef PRINTINTR 2739 #endif /* ATW_DEBUG */ 2740 2741 if ((status & sc->sc_inten) == 0) 2742 break; 2743 2744 handled = 1; 2745 2746 rxstatus = status & sc->sc_rxint_mask; 2747 txstatus = status & sc->sc_txint_mask; 2748 linkstatus = status & sc->sc_linkint_mask; 2749 2750 if (linkstatus) { 2751 atw_linkintr(sc, linkstatus); 2752 } 2753 2754 if (rxstatus) { 2755 /* Grab any new packets. */ 2756 atw_rxintr(sc); 2757 2758 if (rxstatus & ATW_INTR_RDU) { 2759 printf("%s: receive ring overrun\n", 2760 sc->sc_dev.dv_xname); 2761 /* Get the receive process going again. */ 2762 ATW_WRITE(sc, ATW_RDR, 0x1); 2763 break; 2764 } 2765 } 2766 2767 if (txstatus) { 2768 /* Sweep up transmit descriptors. */ 2769 atw_txintr(sc); 2770 2771 if (txstatus & ATW_INTR_TLT) 2772 DPRINTF(sc, ("%s: tx lifetime exceeded\n", 2773 sc->sc_dev.dv_xname)); 2774 2775 if (txstatus & ATW_INTR_TRT) 2776 DPRINTF(sc, ("%s: tx retry limit exceeded\n", 2777 sc->sc_dev.dv_xname)); 2778 2779 /* If Tx under-run, increase our transmit threshold 2780 * if another is available. 2781 */ 2782 txthresh = sc->sc_txthresh + 1; 2783 if ((txstatus & ATW_INTR_TUF) && 2784 sc->sc_txth[txthresh].txth_name != NULL) { 2785 /* Idle the transmit process. */ 2786 atw_idle(sc, ATW_NAR_ST); 2787 2788 sc->sc_txthresh = txthresh; 2789 sc->sc_opmode &= ~(ATW_NAR_TR_MASK|ATW_NAR_SF); 2790 sc->sc_opmode |= 2791 sc->sc_txth[txthresh].txth_opmode; 2792 printf("%s: transmit underrun; new " 2793 "threshold: %s\n", sc->sc_dev.dv_xname, 2794 sc->sc_txth[txthresh].txth_name); 2795 2796 /* Set the new threshold and restart 2797 * the transmit process. 2798 */ 2799 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2800 /* XXX Log every Nth underrun from 2801 * XXX now on? 2802 */ 2803 } 2804 } 2805 2806 if (status & (ATW_INTR_TPS|ATW_INTR_RPS)) { 2807 if (status & ATW_INTR_TPS) 2808 printf("%s: transmit process stopped\n", 2809 sc->sc_dev.dv_xname); 2810 if (status & ATW_INTR_RPS) 2811 printf("%s: receive process stopped\n", 2812 sc->sc_dev.dv_xname); 2813 (void)atw_init(ifp); 2814 break; 2815 } 2816 2817 if (status & ATW_INTR_FBE) { 2818 printf("%s: fatal bus error\n", sc->sc_dev.dv_xname); 2819 (void)atw_init(ifp); 2820 break; 2821 } 2822 2823 /* 2824 * Not handled: 2825 * 2826 * Transmit buffer unavailable -- normal 2827 * condition, nothing to do, really. 2828 * 2829 * Early receive interrupt -- not available on 2830 * all chips, we just use RI. We also only 2831 * use single-segment receive DMA, so this 2832 * is mostly useless. 2833 * 2834 * TBD others 2835 */ 2836 } 2837 2838 /* Try to get more packets going. */ 2839 atw_start(ifp); 2840 2841 return (handled); 2842 } 2843 2844 /* 2845 * atw_idle: 2846 * 2847 * Cause the transmit and/or receive processes to go idle. 2848 * 2849 * XXX It seems that the ADM8211 will not signal the end of the Rx/Tx 2850 * process in STSR if I clear SR or ST after the process has already 2851 * ceased. Fair enough. But the Rx process status bits in ATW_TEST0 2852 * do not seem to be too reliable. Perhaps I have the sense of the 2853 * Rx bits switched with the Tx bits? 2854 */ 2855 void 2856 atw_idle(sc, bits) 2857 struct atw_softc *sc; 2858 u_int32_t bits; 2859 { 2860 u_int32_t ackmask = 0, opmode, stsr, test0; 2861 int i, s; 2862 2863 /* without this, somehow we run concurrently w/ interrupt handler */ 2864 s = splnet(); 2865 2866 opmode = sc->sc_opmode & ~bits; 2867 2868 if (bits & ATW_NAR_SR) 2869 ackmask |= ATW_INTR_RPS; 2870 2871 if (bits & ATW_NAR_ST) { 2872 ackmask |= ATW_INTR_TPS; 2873 /* set ATW_NAR_HF to flush TX FIFO. */ 2874 opmode |= ATW_NAR_HF; 2875 } 2876 2877 ATW_WRITE(sc, ATW_NAR, opmode); 2878 2879 for (i = 0; i < 1000; i++) { 2880 stsr = ATW_READ(sc, ATW_STSR); 2881 if ((stsr & ackmask) == ackmask) 2882 break; 2883 DELAY(10); 2884 } 2885 2886 ATW_WRITE(sc, ATW_STSR, stsr & ackmask); 2887 2888 if ((stsr & ackmask) == ackmask) 2889 goto out; 2890 2891 test0 = ATW_READ(sc, ATW_TEST0); 2892 2893 if ((bits & ATW_NAR_ST) != 0 && (stsr & ATW_INTR_TPS) == 0 && 2894 (test0 & ATW_TEST0_TS_MASK) != ATW_TEST0_TS_STOPPED) { 2895 printf("%s: transmit process not idle [%s]\n", 2896 sc->sc_dev.dv_xname, 2897 atw_tx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_TS_MASK)]); 2898 printf("%s: bits %08x test0 %08x stsr %08x\n", 2899 sc->sc_dev.dv_xname, bits, test0, stsr); 2900 } 2901 2902 if ((bits & ATW_NAR_SR) != 0 && (stsr & ATW_INTR_RPS) == 0 && 2903 (test0 & ATW_TEST0_RS_MASK) != ATW_TEST0_RS_STOPPED) { 2904 DPRINTF2(sc, ("%s: receive process not idle [%s]\n", 2905 sc->sc_dev.dv_xname, 2906 atw_rx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_RS_MASK)])); 2907 DPRINTF2(sc, ("%s: bits %08x test0 %08x stsr %08x\n", 2908 sc->sc_dev.dv_xname, bits, test0, stsr)); 2909 } 2910 out: 2911 splx(s); 2912 return; 2913 } 2914 2915 /* 2916 * atw_linkintr: 2917 * 2918 * Helper; handle link-status interrupts. 2919 */ 2920 void 2921 atw_linkintr(sc, linkstatus) 2922 struct atw_softc *sc; 2923 u_int32_t linkstatus; 2924 { 2925 struct ieee80211com *ic = &sc->sc_ic; 2926 2927 if (ic->ic_state != IEEE80211_S_RUN) 2928 return; 2929 2930 if (linkstatus & ATW_INTR_LINKON) { 2931 DPRINTF(sc, ("%s: link on\n", sc->sc_dev.dv_xname)); 2932 sc->sc_rescan_timer = 0; 2933 } else if (linkstatus & ATW_INTR_LINKOFF) { 2934 DPRINTF(sc, ("%s: link off\n", sc->sc_dev.dv_xname)); 2935 switch (ic->ic_opmode) { 2936 case IEEE80211_M_HOSTAP: 2937 return; 2938 case IEEE80211_M_IBSS: 2939 if (ic->ic_flags & IEEE80211_F_SIBSS) 2940 return; 2941 /*FALLTHROUGH*/ 2942 case IEEE80211_M_STA: 2943 sc->sc_rescan_timer = 3; 2944 ic->ic_if.if_timer = 1; 2945 break; 2946 default: 2947 break; 2948 } 2949 } 2950 } 2951 2952 /* 2953 * atw_rxintr: 2954 * 2955 * Helper; handle receive interrupts. 2956 */ 2957 void 2958 atw_rxintr(sc) 2959 struct atw_softc *sc; 2960 { 2961 static int rate_tbl[] = {2, 4, 11, 22, 44}; 2962 struct ieee80211com *ic = &sc->sc_ic; 2963 struct ieee80211_node *ni; 2964 struct ieee80211_frame *wh; 2965 struct ifnet *ifp = &ic->ic_if; 2966 struct atw_rxsoft *rxs; 2967 struct mbuf *m; 2968 u_int32_t rxstat; 2969 int i, len, rate, rate0; 2970 u_int32_t rssi; 2971 2972 for (i = sc->sc_rxptr;; i = ATW_NEXTRX(i)) { 2973 rxs = &sc->sc_rxsoft[i]; 2974 2975 ATW_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 2976 2977 rxstat = le32toh(sc->sc_rxdescs[i].ar_stat); 2978 rssi = le32toh(sc->sc_rxdescs[i].ar_rssi); 2979 rate0 = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_RXDR_MASK); 2980 2981 if (rxstat & ATW_RXSTAT_OWN) 2982 break; /* We have processed all receive buffers. */ 2983 2984 DPRINTF3(sc, 2985 ("%s: rx stat %08x rssi %08x buf1 %08x buf2 %08x\n", 2986 sc->sc_dev.dv_xname, 2987 sc->sc_rxdescs[i].ar_stat, 2988 sc->sc_rxdescs[i].ar_rssi, 2989 sc->sc_rxdescs[i].ar_buf1, 2990 sc->sc_rxdescs[i].ar_buf2)); 2991 2992 /* 2993 * Make sure the packet fit in one buffer. This should 2994 * always be the case. 2995 */ 2996 if ((rxstat & (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) != 2997 (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) { 2998 printf("%s: incoming packet spilled, resetting\n", 2999 sc->sc_dev.dv_xname); 3000 (void)atw_init(ifp); 3001 return; 3002 } 3003 3004 /* 3005 * If an error occurred, update stats, clear the status 3006 * word, and leave the packet buffer in place. It will 3007 * simply be reused the next time the ring comes around. 3008 * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long 3009 * error. 3010 */ 3011 3012 if ((rxstat & ATW_RXSTAT_ES) != 0 && 3013 ((sc->sc_ic.ic_ec.ec_capenable & ETHERCAP_VLAN_MTU) == 0 || 3014 (rxstat & (ATW_RXSTAT_DE | ATW_RXSTAT_SFDE | 3015 ATW_RXSTAT_SIGE | ATW_RXSTAT_CRC16E | 3016 ATW_RXSTAT_RXTOE | ATW_RXSTAT_CRC32E | 3017 ATW_RXSTAT_ICVE)) != 0)) { 3018 #define PRINTERR(bit, str) \ 3019 if (rxstat & (bit)) \ 3020 printf("%s: receive error: %s\n", \ 3021 sc->sc_dev.dv_xname, str) 3022 ifp->if_ierrors++; 3023 PRINTERR(ATW_RXSTAT_DE, "descriptor error"); 3024 PRINTERR(ATW_RXSTAT_SFDE, "PLCP SFD error"); 3025 PRINTERR(ATW_RXSTAT_SIGE, "PLCP signal error"); 3026 PRINTERR(ATW_RXSTAT_CRC16E, "PLCP CRC16 error"); 3027 PRINTERR(ATW_RXSTAT_RXTOE, "time-out"); 3028 PRINTERR(ATW_RXSTAT_CRC32E, "FCS error"); 3029 PRINTERR(ATW_RXSTAT_ICVE, "WEP ICV error"); 3030 #undef PRINTERR 3031 ATW_INIT_RXDESC(sc, i); 3032 continue; 3033 } 3034 3035 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3036 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 3037 3038 /* 3039 * No errors; receive the packet. Note the ADM8211 3040 * includes the CRC in promiscuous mode. 3041 */ 3042 len = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_FL_MASK); 3043 3044 /* 3045 * Allocate a new mbuf cluster. If that fails, we are 3046 * out of memory, and must drop the packet and recycle 3047 * the buffer that's already attached to this descriptor. 3048 */ 3049 m = rxs->rxs_mbuf; 3050 if (atw_add_rxbuf(sc, i) != 0) { 3051 ifp->if_ierrors++; 3052 ATW_INIT_RXDESC(sc, i); 3053 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3054 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 3055 continue; 3056 } 3057 3058 ifp->if_ipackets++; 3059 if (sc->sc_opmode & ATW_NAR_PR) 3060 m->m_flags |= M_HASFCS; 3061 m->m_pkthdr.rcvif = ifp; 3062 m->m_pkthdr.len = m->m_len = len; 3063 3064 if (rate0 >= sizeof(rate_tbl) / sizeof(rate_tbl[0])) 3065 rate = 0; 3066 else 3067 rate = rate_tbl[rate0]; 3068 3069 #if NBPFILTER > 0 3070 /* Pass this up to any BPF listeners. */ 3071 if (sc->sc_radiobpf != NULL) { 3072 struct mbuf mb; 3073 3074 struct atw_rx_radiotap_header *tap = &sc->sc_rxtap; 3075 3076 tap->ar_rate = rate; 3077 tap->ar_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3078 tap->ar_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3079 3080 /* TBD verify units are dB */ 3081 tap->ar_antsignal = (int)rssi; 3082 /* TBD tap->ar_flags */ 3083 3084 M_COPY_PKTHDR(&mb, m); 3085 mb.m_data = (caddr_t)tap; 3086 mb.m_len = tap->ar_ihdr.it_len; 3087 mb.m_next = m; 3088 mb.m_pkthdr.len += mb.m_len; 3089 bpf_mtap(sc->sc_radiobpf, &mb); 3090 } 3091 #endif /* NPBFILTER > 0 */ 3092 3093 wh = mtod(m, struct ieee80211_frame *); 3094 ni = ieee80211_find_rxnode(ic, wh); 3095 ieee80211_input(ifp, m, ni, rssi, 0); 3096 /* 3097 * The frame may have caused the node to be marked for 3098 * reclamation (e.g. in response to a DEAUTH message) 3099 * so use free_node here instead of unref_node. 3100 */ 3101 if (ni == ic->ic_bss) 3102 ieee80211_unref_node(&ni); 3103 else 3104 ieee80211_free_node(ic, ni); 3105 } 3106 3107 /* Update the receive pointer. */ 3108 sc->sc_rxptr = i; 3109 } 3110 3111 /* 3112 * atw_txintr: 3113 * 3114 * Helper; handle transmit interrupts. 3115 */ 3116 void 3117 atw_txintr(sc) 3118 struct atw_softc *sc; 3119 { 3120 #define TXSTAT_ERRMASK (ATW_TXSTAT_TUF | ATW_TXSTAT_TLT | ATW_TXSTAT_TRT | \ 3121 ATW_TXSTAT_TRO | ATW_TXSTAT_SOFBR) 3122 #define TXSTAT_FMT "\20\31ATW_TXSTAT_SOFBR\32ATW_TXSTAT_TRO\33ATW_TXSTAT_TUF" \ 3123 "\34ATW_TXSTAT_TRT\35ATW_TXSTAT_TLT" 3124 3125 static char txstat_buf[sizeof("ffffffff<>" TXSTAT_FMT)]; 3126 struct ifnet *ifp = &sc->sc_ic.ic_if; 3127 struct atw_txsoft *txs; 3128 u_int32_t txstat; 3129 3130 DPRINTF3(sc, ("%s: atw_txintr: sc_flags 0x%08x\n", 3131 sc->sc_dev.dv_xname, sc->sc_flags)); 3132 3133 ifp->if_flags &= ~IFF_OACTIVE; 3134 3135 /* 3136 * Go through our Tx list and free mbufs for those 3137 * frames that have been transmitted. 3138 */ 3139 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 3140 ATW_CDTXSYNC(sc, txs->txs_lastdesc, 3141 txs->txs_ndescs, 3142 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3143 3144 #ifdef ATW_DEBUG 3145 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3146 int i; 3147 printf(" txsoft %p transmit chain:\n", txs); 3148 for (i = txs->txs_firstdesc;; i = ATW_NEXTTX(i)) { 3149 printf(" descriptor %d:\n", i); 3150 printf(" at_status: 0x%08x\n", 3151 le32toh(sc->sc_txdescs[i].at_stat)); 3152 printf(" at_flags: 0x%08x\n", 3153 le32toh(sc->sc_txdescs[i].at_flags)); 3154 printf(" at_buf1: 0x%08x\n", 3155 le32toh(sc->sc_txdescs[i].at_buf1)); 3156 printf(" at_buf2: 0x%08x\n", 3157 le32toh(sc->sc_txdescs[i].at_buf2)); 3158 if (i == txs->txs_lastdesc) 3159 break; 3160 } 3161 } 3162 #endif 3163 3164 txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].at_stat); 3165 if (txstat & ATW_TXSTAT_OWN) 3166 break; 3167 3168 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 3169 3170 sc->sc_txfree += txs->txs_ndescs; 3171 3172 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 3173 0, txs->txs_dmamap->dm_mapsize, 3174 BUS_DMASYNC_POSTWRITE); 3175 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 3176 m_freem(txs->txs_mbuf); 3177 txs->txs_mbuf = NULL; 3178 3179 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 3180 3181 if ((ifp->if_flags & IFF_DEBUG) != 0 && 3182 (txstat & TXSTAT_ERRMASK) != 0) { 3183 bitmask_snprintf(txstat & TXSTAT_ERRMASK, TXSTAT_FMT, 3184 txstat_buf, sizeof(txstat_buf)); 3185 printf("%s: txstat %s %d\n", sc->sc_dev.dv_xname, 3186 txstat_buf, 3187 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK)); 3188 } 3189 3190 /* 3191 * Check for errors and collisions. 3192 */ 3193 if (txstat & ATW_TXSTAT_TUF) 3194 sc->sc_stats.ts_tx_tuf++; 3195 if (txstat & ATW_TXSTAT_TLT) 3196 sc->sc_stats.ts_tx_tlt++; 3197 if (txstat & ATW_TXSTAT_TRT) 3198 sc->sc_stats.ts_tx_trt++; 3199 if (txstat & ATW_TXSTAT_TRO) 3200 sc->sc_stats.ts_tx_tro++; 3201 if (txstat & ATW_TXSTAT_SOFBR) { 3202 sc->sc_stats.ts_tx_sofbr++; 3203 } 3204 3205 if ((txstat & ATW_TXSTAT_ES) == 0) 3206 ifp->if_collisions += 3207 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK); 3208 else 3209 ifp->if_oerrors++; 3210 3211 ifp->if_opackets++; 3212 } 3213 3214 /* 3215 * If there are no more pending transmissions, cancel the watchdog 3216 * timer. 3217 */ 3218 if (txs == NULL) 3219 sc->sc_tx_timer = 0; 3220 #undef TXSTAT_ERRMASK 3221 #undef TXSTAT_FMT 3222 } 3223 3224 /* 3225 * atw_watchdog: [ifnet interface function] 3226 * 3227 * Watchdog timer handler. 3228 */ 3229 void 3230 atw_watchdog(ifp) 3231 struct ifnet *ifp; 3232 { 3233 struct atw_softc *sc = ifp->if_softc; 3234 struct ieee80211com *ic = &sc->sc_ic; 3235 3236 ifp->if_timer = 0; 3237 if (ATW_IS_ENABLED(sc) == 0) 3238 return; 3239 3240 if (sc->sc_rescan_timer) { 3241 if (--sc->sc_rescan_timer == 0) 3242 (void)ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3243 } 3244 if (sc->sc_tx_timer) { 3245 if (--sc->sc_tx_timer == 0 && 3246 !SIMPLEQ_EMPTY(&sc->sc_txdirtyq)) { 3247 printf("%s: transmit timeout\n", ifp->if_xname); 3248 ifp->if_oerrors++; 3249 (void)atw_init(ifp); 3250 atw_start(ifp); 3251 } 3252 } 3253 if (sc->sc_tx_timer != 0 || sc->sc_rescan_timer != 0) 3254 ifp->if_timer = 1; 3255 ieee80211_watchdog(ifp); 3256 } 3257 3258 /* Compute the 802.11 Duration field and the PLCP Length fields for 3259 * a len-byte frame (HEADER + PAYLOAD + FCS) sent at rate * 500Kbps. 3260 * Write the fields to the ADM8211 Tx header, frm. 3261 * 3262 * TBD use the fragmentation threshold to find the right duration for 3263 * the first & last fragments. 3264 * 3265 * TBD make certain of the duration fields applied by the ADM8211 to each 3266 * fragment. I think that the ADM8211 knows how to subtract the CTS 3267 * duration when ATW_HDRCTL_RTSCTS is clear; that is why I add it regardless. 3268 * I also think that the ADM8211 does *some* arithmetic for us, because 3269 * otherwise I think we would have to set a first duration for CTS/first 3270 * fragment, a second duration for fragments between the first and the 3271 * last, and a third duration for the last fragment. 3272 * 3273 * TBD make certain that duration fields reflect addition of FCS/WEP 3274 * and correct duration arithmetic as necessary. 3275 */ 3276 static void 3277 atw_frame_setdurs(struct atw_softc *sc, struct atw_frame *frm, int rate, 3278 int len) 3279 { 3280 int remainder; 3281 3282 /* deal also with encrypted fragments */ 3283 if (frm->atw_hdrctl & htole16(ATW_HDRCTL_WEP)) { 3284 DPRINTF2(sc, ("%s: atw_frame_setdurs len += 8\n", 3285 sc->sc_dev.dv_xname)); 3286 len += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + 3287 IEEE80211_WEP_CRCLEN; 3288 } 3289 3290 /* 802.11 Duration Field for CTS/Data/ACK sequence minus FCS & WEP 3291 * duration (XXX added by MAC?). 3292 */ 3293 frm->atw_head_dur = (16 * (len - IEEE80211_CRC_LEN)) / rate; 3294 remainder = (16 * (len - IEEE80211_CRC_LEN)) % rate; 3295 3296 if (rate <= 4) 3297 /* 1-2Mbps WLAN: send ACK/CTS at 1Mbps */ 3298 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3299 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3300 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3301 IEEE80211_DUR_DS_SLOW_CTS + IEEE80211_DUR_DS_SLOW_ACK; 3302 else 3303 /* 5-11Mbps WLAN: send ACK/CTS at 2Mbps */ 3304 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3305 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3306 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3307 IEEE80211_DUR_DS_FAST_CTS + IEEE80211_DUR_DS_FAST_ACK; 3308 3309 /* lengthen duration if long preamble */ 3310 if ((sc->sc_flags & ATWF_SHORT_PREAMBLE) == 0) 3311 frm->atw_head_dur += 3312 3 * (IEEE80211_DUR_DS_LONG_PREAMBLE - 3313 IEEE80211_DUR_DS_SHORT_PREAMBLE) + 3314 3 * (IEEE80211_DUR_DS_SLOW_PLCPHDR - 3315 IEEE80211_DUR_DS_FAST_PLCPHDR); 3316 3317 if (remainder != 0) 3318 frm->atw_head_dur++; 3319 3320 if ((atw_voodoo & VOODOO_DUR_2_4_SPECIALCASE) && 3321 (rate == 2 || rate == 4)) { 3322 /* derived from Linux: how could this be right? */ 3323 frm->atw_head_plcplen = frm->atw_head_dur; 3324 } else { 3325 frm->atw_head_plcplen = (16 * len) / rate; 3326 remainder = (80 * len) % (rate * 5); 3327 3328 if (remainder != 0) { 3329 frm->atw_head_plcplen++; 3330 3331 /* XXX magic */ 3332 if ((atw_voodoo & VOODOO_DUR_11_ROUNDING) && 3333 rate == 22 && remainder <= 30) 3334 frm->atw_head_plcplen |= 0x8000; 3335 } 3336 } 3337 frm->atw_tail_plcplen = frm->atw_head_plcplen = 3338 htole16(frm->atw_head_plcplen); 3339 frm->atw_tail_dur = frm->atw_head_dur = htole16(frm->atw_head_dur); 3340 } 3341 3342 #ifdef ATW_DEBUG 3343 static void 3344 atw_dump_pkt(struct ifnet *ifp, struct mbuf *m0) 3345 { 3346 struct atw_softc *sc = ifp->if_softc; 3347 struct mbuf *m; 3348 int i, noctets = 0; 3349 3350 printf("%s: %d-byte packet\n", sc->sc_dev.dv_xname, 3351 m0->m_pkthdr.len); 3352 3353 for (m = m0; m; m = m->m_next) { 3354 if (m->m_len == 0) 3355 continue; 3356 for (i = 0; i < m->m_len; i++) { 3357 printf(" %02x", ((u_int8_t*)m->m_data)[i]); 3358 if (++noctets % 24 == 0) 3359 printf("\n"); 3360 } 3361 } 3362 printf("%s%s: %d bytes emitted\n", 3363 (noctets % 24 != 0) ? "\n" : "", sc->sc_dev.dv_xname, noctets); 3364 } 3365 #endif /* ATW_DEBUG */ 3366 3367 /* 3368 * atw_start: [ifnet interface function] 3369 * 3370 * Start packet transmission on the interface. 3371 */ 3372 void 3373 atw_start(ifp) 3374 struct ifnet *ifp; 3375 { 3376 struct atw_softc *sc = ifp->if_softc; 3377 struct ieee80211com *ic = &sc->sc_ic; 3378 struct ieee80211_node *ni; 3379 struct ieee80211_frame *wh; 3380 struct atw_frame *hh; 3381 struct mbuf *m0, *m; 3382 struct atw_txsoft *txs, *last_txs; 3383 struct atw_txdesc *txd; 3384 int do_encrypt, rate; 3385 bus_dmamap_t dmamap; 3386 int ctl, error, firsttx, nexttx, lasttx = -1, first, ofree, seg; 3387 3388 DPRINTF2(sc, ("%s: atw_start: sc_flags 0x%08x, if_flags 0x%08x\n", 3389 sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags)); 3390 3391 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 3392 return; 3393 3394 #if 0 /* TBD ??? */ 3395 if ((sc->sc_flags & ATWF_LINK_UP) == 0 && ifp->if_snd.ifq_len < 10) 3396 return; 3397 #endif 3398 3399 /* 3400 * Remember the previous number of free descriptors and 3401 * the first descriptor we'll use. 3402 */ 3403 ofree = sc->sc_txfree; 3404 firsttx = sc->sc_txnext; 3405 3406 DPRINTF2(sc, ("%s: atw_start: txfree %d, txnext %d\n", 3407 sc->sc_dev.dv_xname, ofree, firsttx)); 3408 3409 /* 3410 * Loop through the send queue, setting up transmit descriptors 3411 * until we drain the queue, or use up all available transmit 3412 * descriptors. 3413 */ 3414 while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && 3415 sc->sc_txfree != 0) { 3416 3417 do_encrypt = 0; 3418 /* 3419 * Grab a packet off the management queue, if it 3420 * is not empty. Otherwise, from the data queue. 3421 */ 3422 IF_DEQUEUE(&ic->ic_mgtq, m0); 3423 if (m0 != NULL) { 3424 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 3425 m0->m_pkthdr.rcvif = NULL; 3426 } else { 3427 IFQ_DEQUEUE(&ifp->if_snd, m0); 3428 if (m0 == NULL) 3429 break; 3430 #if NBPFILTER > 0 3431 if (ifp->if_bpf != NULL) 3432 bpf_mtap(ifp->if_bpf, m0); 3433 #endif /* NBPFILTER > 0 */ 3434 if ((m0 = ieee80211_encap(ifp, m0, &ni)) == NULL) { 3435 ifp->if_oerrors++; 3436 break; 3437 } 3438 } 3439 3440 rate = MAX(ieee80211_get_rate(ic), 2); 3441 3442 #if NBPFILTER > 0 3443 /* 3444 * Pass the packet to any BPF listeners. 3445 */ 3446 if (ic->ic_rawbpf != NULL) 3447 bpf_mtap((caddr_t)ic->ic_rawbpf, m0); 3448 3449 if (sc->sc_radiobpf != NULL) { 3450 struct mbuf mb; 3451 struct atw_tx_radiotap_header *tap = &sc->sc_txtap; 3452 3453 tap->at_rate = rate; 3454 tap->at_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3455 tap->at_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3456 3457 /* TBD tap->at_flags */ 3458 3459 M_COPY_PKTHDR(&mb, m0); 3460 mb.m_data = (caddr_t)tap; 3461 mb.m_len = tap->at_ihdr.it_len; 3462 mb.m_next = m0; 3463 mb.m_pkthdr.len += mb.m_len; 3464 bpf_mtap(sc->sc_radiobpf, &mb); 3465 } 3466 #endif /* NBPFILTER > 0 */ 3467 3468 M_PREPEND(m0, offsetof(struct atw_frame, atw_ihdr), M_DONTWAIT); 3469 3470 if (ni != NULL && ni != ic->ic_bss) 3471 ieee80211_free_node(ic, ni); 3472 3473 if (m0 == NULL) { 3474 ifp->if_oerrors++; 3475 break; 3476 } 3477 3478 /* just to make sure. */ 3479 m0 = m_pullup(m0, sizeof(struct atw_frame)); 3480 3481 if (m0 == NULL) { 3482 ifp->if_oerrors++; 3483 break; 3484 } 3485 3486 hh = mtod(m0, struct atw_frame *); 3487 wh = &hh->atw_ihdr; 3488 3489 do_encrypt = (wh->i_fc[1] & IEEE80211_FC1_WEP) ? 1 : 0; 3490 3491 /* Copy everything we need from the 802.11 header: 3492 * Frame Control; address 1, address 3, or addresses 3493 * 3 and 4. NIC fills in BSSID, SA. 3494 */ 3495 if (wh->i_fc[1] & IEEE80211_FC1_DIR_TODS) { 3496 if (wh->i_fc[1] & IEEE80211_FC1_DIR_FROMDS) 3497 panic("%s: illegal WDS frame", 3498 sc->sc_dev.dv_xname); 3499 memcpy(hh->atw_dst, wh->i_addr3, IEEE80211_ADDR_LEN); 3500 } else 3501 memcpy(hh->atw_dst, wh->i_addr1, IEEE80211_ADDR_LEN); 3502 3503 *(u_int16_t*)hh->atw_fc = *(u_int16_t*)wh->i_fc; 3504 3505 /* initialize remaining Tx parameters */ 3506 memset(&hh->u, 0, sizeof(hh->u)); 3507 3508 hh->atw_rate = rate * 5; 3509 /* XXX this could be incorrect if M_FCS. _encap should 3510 * probably strip FCS just in case it sticks around in 3511 * bridged packets. 3512 */ 3513 hh->atw_service = IEEE80211_PLCP_SERVICE; /* XXX guess */ 3514 hh->atw_paylen = htole16(m0->m_pkthdr.len - 3515 sizeof(struct atw_frame)); 3516 3517 #if 0 3518 /* this virtually guaranteed that WEP-encrypted frames 3519 * are fragmented. oops. 3520 */ 3521 hh->atw_fragthr = htole16(m0->m_pkthdr.len - 3522 sizeof(struct atw_frame) + sizeof(struct ieee80211_frame)); 3523 hh->atw_fragthr &= htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3524 #else 3525 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3526 #endif 3527 3528 hh->atw_rtylmt = 3; 3529 hh->atw_hdrctl = htole16(ATW_HDRCTL_UNKNOWN1); 3530 if (do_encrypt) { 3531 hh->atw_hdrctl |= htole16(ATW_HDRCTL_WEP); 3532 hh->atw_keyid = ic->ic_wep_txkey; 3533 } 3534 3535 /* TBD 4-addr frames */ 3536 atw_frame_setdurs(sc, hh, rate, 3537 m0->m_pkthdr.len - sizeof(struct atw_frame) + 3538 sizeof(struct ieee80211_frame) + IEEE80211_CRC_LEN); 3539 3540 /* never fragment multicast frames */ 3541 if (IEEE80211_IS_MULTICAST(hh->atw_dst)) { 3542 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3543 } else if (sc->sc_flags & ATWF_RTSCTS) { 3544 hh->atw_hdrctl |= htole16(ATW_HDRCTL_RTSCTS); 3545 } 3546 3547 #ifdef ATW_DEBUG 3548 /* experimental stuff */ 3549 if (atw_xrtylmt != ~0) 3550 hh->atw_rtylmt = atw_xrtylmt; 3551 if (atw_xhdrctl != 0) 3552 hh->atw_hdrctl |= htole16(atw_xhdrctl); 3553 if (atw_xservice != IEEE80211_PLCP_SERVICE) 3554 hh->atw_service = atw_xservice; 3555 if (atw_xpaylen != 0) 3556 hh->atw_paylen = htole16(atw_xpaylen); 3557 hh->atw_fragnum = 0; 3558 3559 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3560 printf("%s: dst = %s, rate = 0x%02x, " 3561 "service = 0x%02x, paylen = 0x%04x\n", 3562 sc->sc_dev.dv_xname, ether_sprintf(hh->atw_dst), 3563 hh->atw_rate, hh->atw_service, hh->atw_paylen); 3564 3565 printf("%s: fc[0] = 0x%02x, fc[1] = 0x%02x, " 3566 "dur1 = 0x%04x, dur2 = 0x%04x, " 3567 "dur3 = 0x%04x, rts_dur = 0x%04x\n", 3568 sc->sc_dev.dv_xname, hh->atw_fc[0], hh->atw_fc[1], 3569 hh->atw_tail_plcplen, hh->atw_head_plcplen, 3570 hh->atw_tail_dur, hh->atw_head_dur); 3571 3572 printf("%s: hdrctl = 0x%04x, fragthr = 0x%04x, " 3573 "fragnum = 0x%02x, rtylmt = 0x%04x\n", 3574 sc->sc_dev.dv_xname, hh->atw_hdrctl, 3575 hh->atw_fragthr, hh->atw_fragnum, hh->atw_rtylmt); 3576 3577 printf("%s: keyid = %d\n", 3578 sc->sc_dev.dv_xname, hh->atw_keyid); 3579 3580 atw_dump_pkt(ifp, m0); 3581 } 3582 #endif /* ATW_DEBUG */ 3583 3584 dmamap = txs->txs_dmamap; 3585 3586 /* 3587 * Load the DMA map. Copy and try (once) again if the packet 3588 * didn't fit in the alloted number of segments. 3589 */ 3590 for (first = 1; 3591 (error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 3592 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 && first; 3593 first = 0) { 3594 MGETHDR(m, M_DONTWAIT, MT_DATA); 3595 if (m == NULL) { 3596 printf("%s: unable to allocate Tx mbuf\n", 3597 sc->sc_dev.dv_xname); 3598 break; 3599 } 3600 if (m0->m_pkthdr.len > MHLEN) { 3601 MCLGET(m, M_DONTWAIT); 3602 if ((m->m_flags & M_EXT) == 0) { 3603 printf("%s: unable to allocate Tx " 3604 "cluster\n", sc->sc_dev.dv_xname); 3605 m_freem(m); 3606 break; 3607 } 3608 } 3609 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 3610 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 3611 m_freem(m0); 3612 m0 = m; 3613 m = NULL; 3614 } 3615 if (error != 0) { 3616 printf("%s: unable to load Tx buffer, " 3617 "error = %d\n", sc->sc_dev.dv_xname, error); 3618 m_freem(m0); 3619 break; 3620 } 3621 3622 /* 3623 * Ensure we have enough descriptors free to describe 3624 * the packet. 3625 */ 3626 if (dmamap->dm_nsegs > sc->sc_txfree) { 3627 /* 3628 * Not enough free descriptors to transmit 3629 * this packet. Unload the DMA map and 3630 * drop the packet. Notify the upper layer 3631 * that there are no more slots left. 3632 * 3633 * XXX We could allocate an mbuf and copy, but 3634 * XXX it is worth it? 3635 */ 3636 ifp->if_flags |= IFF_OACTIVE; 3637 bus_dmamap_unload(sc->sc_dmat, dmamap); 3638 m_freem(m0); 3639 break; 3640 } 3641 3642 /* 3643 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 3644 */ 3645 3646 /* Sync the DMA map. */ 3647 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 3648 BUS_DMASYNC_PREWRITE); 3649 3650 /* XXX arbitrary retry limit; 8 because I have seen it in 3651 * use already and maybe 0 means "no tries" ! 3652 */ 3653 ctl = htole32(LSHIFT(8, ATW_TXCTL_TL_MASK)); 3654 3655 DPRINTF2(sc, ("%s: TXDR <- max(10, %d)\n", 3656 sc->sc_dev.dv_xname, rate * 5)); 3657 ctl |= htole32(LSHIFT(MAX(10, rate * 5), ATW_TXCTL_TXDR_MASK)); 3658 3659 /* 3660 * Initialize the transmit descriptors. 3661 */ 3662 for (nexttx = sc->sc_txnext, seg = 0; 3663 seg < dmamap->dm_nsegs; 3664 seg++, nexttx = ATW_NEXTTX(nexttx)) { 3665 /* 3666 * If this is the first descriptor we're 3667 * enqueueing, don't set the OWN bit just 3668 * yet. That could cause a race condition. 3669 * We'll do it below. 3670 */ 3671 txd = &sc->sc_txdescs[nexttx]; 3672 txd->at_ctl = ctl | 3673 ((nexttx == firsttx) ? 0 : htole32(ATW_TXCTL_OWN)); 3674 3675 txd->at_buf1 = htole32(dmamap->dm_segs[seg].ds_addr); 3676 txd->at_flags = 3677 htole32(LSHIFT(dmamap->dm_segs[seg].ds_len, 3678 ATW_TXFLAG_TBS1_MASK)) | 3679 ((nexttx == (ATW_NTXDESC - 1)) 3680 ? htole32(ATW_TXFLAG_TER) : 0); 3681 lasttx = nexttx; 3682 } 3683 3684 IASSERT(lasttx != -1, ("bad lastx")); 3685 /* Set `first segment' and `last segment' appropriately. */ 3686 sc->sc_txdescs[sc->sc_txnext].at_flags |= 3687 htole32(ATW_TXFLAG_FS); 3688 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_LS); 3689 3690 #ifdef ATW_DEBUG 3691 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3692 printf(" txsoft %p transmit chain:\n", txs); 3693 for (seg = sc->sc_txnext;; seg = ATW_NEXTTX(seg)) { 3694 printf(" descriptor %d:\n", seg); 3695 printf(" at_ctl: 0x%08x\n", 3696 le32toh(sc->sc_txdescs[seg].at_ctl)); 3697 printf(" at_flags: 0x%08x\n", 3698 le32toh(sc->sc_txdescs[seg].at_flags)); 3699 printf(" at_buf1: 0x%08x\n", 3700 le32toh(sc->sc_txdescs[seg].at_buf1)); 3701 printf(" at_buf2: 0x%08x\n", 3702 le32toh(sc->sc_txdescs[seg].at_buf2)); 3703 if (seg == lasttx) 3704 break; 3705 } 3706 } 3707 #endif 3708 3709 /* Sync the descriptors we're using. */ 3710 ATW_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 3711 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3712 3713 /* 3714 * Store a pointer to the packet so we can free it later, 3715 * and remember what txdirty will be once the packet is 3716 * done. 3717 */ 3718 txs->txs_mbuf = m0; 3719 txs->txs_firstdesc = sc->sc_txnext; 3720 txs->txs_lastdesc = lasttx; 3721 txs->txs_ndescs = dmamap->dm_nsegs; 3722 3723 /* Advance the tx pointer. */ 3724 sc->sc_txfree -= dmamap->dm_nsegs; 3725 sc->sc_txnext = nexttx; 3726 3727 SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 3728 SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 3729 3730 last_txs = txs; 3731 } 3732 3733 if (txs == NULL || sc->sc_txfree == 0) { 3734 /* No more slots left; notify upper layer. */ 3735 ifp->if_flags |= IFF_OACTIVE; 3736 } 3737 3738 if (sc->sc_txfree != ofree) { 3739 DPRINTF2(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", 3740 sc->sc_dev.dv_xname, lasttx, firsttx)); 3741 /* 3742 * Cause a transmit interrupt to happen on the 3743 * last packet we enqueued. 3744 */ 3745 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_IC); 3746 ATW_CDTXSYNC(sc, lasttx, 1, 3747 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3748 3749 /* 3750 * The entire packet chain is set up. Give the 3751 * first descriptor to the chip now. 3752 */ 3753 sc->sc_txdescs[firsttx].at_ctl |= htole32(ATW_TXCTL_OWN); 3754 ATW_CDTXSYNC(sc, firsttx, 1, 3755 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3756 3757 /* Wake up the transmitter. */ 3758 /* XXX USE AUTOPOLLING? */ 3759 ATW_WRITE(sc, ATW_TDR, 0x1); 3760 3761 /* Set a watchdog timer in case the chip flakes out. */ 3762 sc->sc_tx_timer = 5; 3763 ifp->if_timer = 1; 3764 } 3765 } 3766 3767 /* 3768 * atw_power: 3769 * 3770 * Power management (suspend/resume) hook. 3771 */ 3772 void 3773 atw_power(why, arg) 3774 int why; 3775 void *arg; 3776 { 3777 struct atw_softc *sc = arg; 3778 struct ifnet *ifp = &sc->sc_ic.ic_if; 3779 int s; 3780 3781 DPRINTF(sc, ("%s: atw_power(%d,)\n", sc->sc_dev.dv_xname, why)); 3782 3783 s = splnet(); 3784 switch (why) { 3785 case PWR_STANDBY: 3786 /* XXX do nothing. */ 3787 break; 3788 case PWR_SUSPEND: 3789 atw_stop(ifp, 0); 3790 if (sc->sc_power != NULL) 3791 (*sc->sc_power)(sc, why); 3792 break; 3793 case PWR_RESUME: 3794 if (ifp->if_flags & IFF_UP) { 3795 if (sc->sc_power != NULL) 3796 (*sc->sc_power)(sc, why); 3797 atw_init(ifp); 3798 } 3799 break; 3800 case PWR_SOFTSUSPEND: 3801 case PWR_SOFTSTANDBY: 3802 case PWR_SOFTRESUME: 3803 break; 3804 } 3805 splx(s); 3806 } 3807 3808 /* 3809 * atw_ioctl: [ifnet interface function] 3810 * 3811 * Handle control requests from the operator. 3812 */ 3813 int 3814 atw_ioctl(ifp, cmd, data) 3815 struct ifnet *ifp; 3816 u_long cmd; 3817 caddr_t data; 3818 { 3819 struct atw_softc *sc = ifp->if_softc; 3820 struct ifreq *ifr = (struct ifreq *)data; 3821 int s, error = 0; 3822 3823 /* XXX monkey see, monkey do. comes from wi_ioctl. */ 3824 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 3825 return ENXIO; 3826 3827 s = splnet(); 3828 3829 switch (cmd) { 3830 case SIOCSIFFLAGS: 3831 if (ifp->if_flags & IFF_UP) { 3832 if (ATW_IS_ENABLED(sc)) { 3833 /* 3834 * To avoid rescanning another access point, 3835 * do not call atw_init() here. Instead, 3836 * only reflect media settings. 3837 */ 3838 atw_filter_setup(sc); 3839 } else 3840 error = atw_init(ifp); 3841 } else if (ATW_IS_ENABLED(sc)) 3842 atw_stop(ifp, 1); 3843 break; 3844 case SIOCADDMULTI: 3845 case SIOCDELMULTI: 3846 error = (cmd == SIOCADDMULTI) ? 3847 ether_addmulti(ifr, &sc->sc_ic.ic_ec) : 3848 ether_delmulti(ifr, &sc->sc_ic.ic_ec); 3849 if (error == ENETRESET) { 3850 if (ATW_IS_ENABLED(sc)) 3851 atw_filter_setup(sc); /* do not rescan */ 3852 error = 0; 3853 } 3854 break; 3855 default: 3856 error = ieee80211_ioctl(ifp, cmd, data); 3857 if (error == ENETRESET) { 3858 if (ATW_IS_ENABLED(sc)) 3859 error = atw_init(ifp); 3860 else 3861 error = 0; 3862 } 3863 break; 3864 } 3865 3866 /* Try to get more packets going. */ 3867 if (ATW_IS_ENABLED(sc)) 3868 atw_start(ifp); 3869 3870 splx(s); 3871 return (error); 3872 } 3873 3874 static int 3875 atw_media_change(struct ifnet *ifp) 3876 { 3877 int error; 3878 3879 error = ieee80211_media_change(ifp); 3880 if (error == ENETRESET) { 3881 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == 3882 (IFF_RUNNING|IFF_UP)) 3883 atw_init(ifp); /* XXX lose error */ 3884 error = 0; 3885 } 3886 return error; 3887 } 3888 3889 static void 3890 atw_media_status(struct ifnet *ifp, struct ifmediareq *imr) 3891 { 3892 struct atw_softc *sc = ifp->if_softc; 3893 3894 if (ATW_IS_ENABLED(sc) == 0) { 3895 imr->ifm_active = IFM_IEEE80211 | IFM_NONE; 3896 imr->ifm_status = 0; 3897 return; 3898 } 3899 ieee80211_media_status(ifp, imr); 3900 } 3901
Indexes created Tue Sep 23 20:09:58 GMT 2025