atw.c revision 1.54
1 /* $NetBSD: atw.c,v 1.54 2004/07/15 07:00:43 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 1.54 2004/07/15 07:00:43 dyoung Exp $"); 45 46 #include "bpfilter.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/callout.h> 51 #include <sys/mbuf.h> 52 #include <sys/malloc.h> 53 #include <sys/kernel.h> 54 #include <sys/socket.h> 55 #include <sys/ioctl.h> 56 #include <sys/errno.h> 57 #include <sys/device.h> 58 #include <sys/time.h> 59 60 #include <machine/endian.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <net/if.h> 65 #include <net/if_dl.h> 66 #include <net/if_media.h> 67 #include <net/if_ether.h> 68 69 #include <net80211/ieee80211_var.h> 70 #include <net80211/ieee80211_compat.h> 71 #include <net80211/ieee80211_radiotap.h> 72 73 #if NBPFILTER > 0 74 #include <net/bpf.h> 75 #endif 76 77 #include <machine/bus.h> 78 #include <machine/intr.h> 79 80 #include <dev/ic/atwreg.h> 81 #include <dev/ic/rf3000reg.h> 82 #include <dev/ic/si4136reg.h> 83 #include <dev/ic/atwvar.h> 84 #include <dev/ic/smc93cx6var.h> 85 86 /* XXX TBD open questions 87 * 88 * 89 * When should I set DSSS PAD in reg 0x15 of RF3000? In 1-2Mbps 90 * modes only, or all modes (5.5-11 Mbps CCK modes, too?) Does the MAC 91 * handle this for me? 92 * 93 */ 94 /* device attachment 95 * 96 * print TOFS[012] 97 * 98 * device initialization 99 * 100 * clear ATW_FRCTL_MAXPSP to disable max power saving 101 * set ATW_TXBR_ALCUPDATE to enable ALC 102 * set TOFS[012]? (hope not) 103 * disable rx/tx 104 * set ATW_PAR_SWR (software reset) 105 * wait for ATW_PAR_SWR clear 106 * disable interrupts 107 * ack status register 108 * enable interrupts 109 * 110 * rx/tx initialization 111 * 112 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 113 * allocate and init descriptor rings 114 * write ATW_PAR_DSL (descriptor skip length) 115 * write descriptor base addrs: ATW_TDBD, ATW_TDBP, write ATW_RDB 116 * write ATW_NAR_SQ for one/both transmit descriptor rings 117 * write ATW_NAR_SQ for one/both transmit descriptor rings 118 * enable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 119 * 120 * rx/tx end 121 * 122 * stop DMA 123 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 124 * flush tx w/ ATW_NAR_HF 125 * 126 * scan 127 * 128 * initialize rx/tx 129 * 130 * BSS join: (re)association response 131 * 132 * set ATW_FRCTL_AID 133 * 134 * optimizations ??? 135 * 136 */ 137 138 #define VOODOO_DUR_11_ROUNDING 0x01 /* necessary */ 139 #define VOODOO_DUR_2_4_SPECIALCASE 0x02 /* NOT necessary */ 140 int atw_voodoo = VOODOO_DUR_11_ROUNDING; 141 142 int atw_rfio_enable_delay = 20 * 1000; 143 int atw_rfio_disable_delay = 2 * 1000; 144 int atw_writewep_delay = 5; 145 int atw_beacon_len_adjust = 4; 146 int atw_dwelltime = 200; 147 148 #ifdef ATW_DEBUG 149 int atw_debug = 0; 150 151 #define ATW_DPRINTF(x) if (atw_debug > 0) printf x 152 #define ATW_DPRINTF2(x) if (atw_debug > 1) printf x 153 #define ATW_DPRINTF3(x) if (atw_debug > 2) printf x 154 #define DPRINTF(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) printf x 155 #define DPRINTF2(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF2(x) 156 #define DPRINTF3(sc, x) if ((sc)->sc_ic.ic_if.if_flags & IFF_DEBUG) ATW_DPRINTF3(x) 157 158 static void atw_print_regs(struct atw_softc *, const char *); 159 static void atw_dump_pkt(struct ifnet *, struct mbuf *); 160 161 /* Note well: I never got atw_rf3000_read or atw_si4126_read to work. */ 162 # ifdef ATW_BBPDEBUG 163 static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 164 static void atw_rf3000_print(struct atw_softc *); 165 # endif /* ATW_BBPDEBUG */ 166 167 # ifdef ATW_SYNDEBUG 168 static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 169 static void atw_si4126_print(struct atw_softc *); 170 # endif /* ATW_SYNDEBUG */ 171 172 #else 173 #define ATW_DPRINTF(x) 174 #define ATW_DPRINTF2(x) 175 #define ATW_DPRINTF3(x) 176 #define DPRINTF(sc, x) /* nothing */ 177 #define DPRINTF2(sc, x) /* nothing */ 178 #define DPRINTF3(sc, x) /* nothing */ 179 #endif 180 181 #ifdef ATW_STATS 182 void atw_print_stats(struct atw_softc *); 183 #endif 184 185 void atw_start(struct ifnet *); 186 void atw_watchdog(struct ifnet *); 187 int atw_ioctl(struct ifnet *, u_long, caddr_t); 188 int atw_init(struct ifnet *); 189 void atw_txdrain(struct atw_softc *); 190 void atw_stop(struct ifnet *, int); 191 192 void atw_reset(struct atw_softc *); 193 int atw_read_srom(struct atw_softc *); 194 195 void atw_shutdown(void *); 196 197 void atw_rxdrain(struct atw_softc *); 198 int atw_add_rxbuf(struct atw_softc *, int); 199 void atw_idle(struct atw_softc *, u_int32_t); 200 201 int atw_enable(struct atw_softc *); 202 void atw_disable(struct atw_softc *); 203 void atw_power(int, void *); 204 205 void atw_rxintr(struct atw_softc *); 206 void atw_txintr(struct atw_softc *); 207 void atw_linkintr(struct atw_softc *, u_int32_t); 208 209 static int atw_newstate(struct ieee80211com *, enum ieee80211_state, int); 210 static void atw_tsf(struct atw_softc *); 211 static void atw_start_beacon(struct atw_softc *, int); 212 static void atw_write_wep(struct atw_softc *); 213 static void atw_write_bssid(struct atw_softc *); 214 static void atw_write_ssid(struct atw_softc *); 215 static void atw_write_sup_rates(struct atw_softc *); 216 static void atw_clear_sram(struct atw_softc *); 217 static void atw_write_sram(struct atw_softc *, u_int, u_int8_t *, u_int); 218 static int atw_media_change(struct ifnet *); 219 static void atw_media_status(struct ifnet *, struct ifmediareq *); 220 static void atw_filter_setup(struct atw_softc *); 221 static void atw_frame_setdurs(struct atw_softc *, struct atw_frame *, int, int); 222 static __inline u_int64_t atw_predict_beacon(u_int64_t, u_int32_t); 223 static void atw_recv_beacon(struct ieee80211com *, struct mbuf *, 224 struct ieee80211_node *, int, int, u_int32_t); 225 static void atw_recv_mgmt(struct ieee80211com *, struct mbuf *, 226 struct ieee80211_node *, int, int, u_int32_t); 227 static void atw_node_free(struct ieee80211com *, struct ieee80211_node *); 228 static struct ieee80211_node *atw_node_alloc(struct ieee80211com *); 229 230 static int atw_tune(struct atw_softc *); 231 232 static void atw_rfio_enable(struct atw_softc *, int); 233 234 /* RFMD RF3000 Baseband Processor */ 235 static int atw_rf3000_init(struct atw_softc *); 236 static int atw_rf3000_tune(struct atw_softc *, u_int8_t); 237 static int atw_rf3000_write(struct atw_softc *, u_int, u_int); 238 #ifdef ATW_DEBUG 239 static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 240 #endif /* ATW_DEBUG */ 241 242 /* Silicon Laboratories Si4126 RF/IF Synthesizer */ 243 static int atw_si4126_tune(struct atw_softc *, u_int8_t); 244 static int atw_si4126_write(struct atw_softc *, u_int, u_int); 245 #ifdef ATW_DEBUG 246 static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 247 #endif /* ATW_DEBUG */ 248 249 const struct atw_txthresh_tab atw_txthresh_tab_lo[] = ATW_TXTHRESH_TAB_LO_RATE; 250 const struct atw_txthresh_tab atw_txthresh_tab_hi[] = ATW_TXTHRESH_TAB_HI_RATE; 251 252 const char *atw_tx_state[] = { 253 "STOPPED", 254 "RUNNING - read descriptor", 255 "RUNNING - transmitting", 256 "RUNNING - filling fifo", /* XXX */ 257 "SUSPENDED", 258 "RUNNING -- write descriptor", 259 "RUNNING -- write last descriptor", 260 "RUNNING - fifo full" 261 }; 262 263 const char *atw_rx_state[] = { 264 "STOPPED", 265 "RUNNING - read descriptor", 266 "RUNNING - check this packet, pre-fetch next", 267 "RUNNING - wait for reception", 268 "SUSPENDED", 269 "RUNNING - write descriptor", 270 "RUNNING - flush fifo", 271 "RUNNING - fifo drain" 272 }; 273 274 int 275 atw_activate(struct device *self, enum devact act) 276 { 277 struct atw_softc *sc = (struct atw_softc *)self; 278 int rv = 0, s; 279 280 s = splnet(); 281 switch (act) { 282 case DVACT_ACTIVATE: 283 rv = EOPNOTSUPP; 284 break; 285 286 case DVACT_DEACTIVATE: 287 if_deactivate(&sc->sc_ic.ic_if); 288 break; 289 } 290 splx(s); 291 return rv; 292 } 293 294 /* 295 * atw_enable: 296 * 297 * Enable the ADM8211 chip. 298 */ 299 int 300 atw_enable(struct atw_softc *sc) 301 { 302 303 if (ATW_IS_ENABLED(sc) == 0) { 304 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 305 printf("%s: device enable failed\n", 306 sc->sc_dev.dv_xname); 307 return (EIO); 308 } 309 sc->sc_flags |= ATWF_ENABLED; 310 } 311 return (0); 312 } 313 314 /* 315 * atw_disable: 316 * 317 * Disable the ADM8211 chip. 318 */ 319 void 320 atw_disable(struct atw_softc *sc) 321 { 322 if (!ATW_IS_ENABLED(sc)) 323 return; 324 if (sc->sc_disable != NULL) 325 (*sc->sc_disable)(sc); 326 sc->sc_flags &= ~ATWF_ENABLED; 327 } 328 329 /* Returns -1 on failure. */ 330 int 331 atw_read_srom(struct atw_softc *sc) 332 { 333 struct seeprom_descriptor sd; 334 u_int32_t reg; 335 336 (void)memset(&sd, 0, sizeof(sd)); 337 338 reg = ATW_READ(sc, ATW_TEST0); 339 340 if ((reg & (ATW_TEST0_EPNE|ATW_TEST0_EPSNM)) != 0) { 341 printf("%s: bad or missing/bad SROM\n", sc->sc_dev.dv_xname); 342 return -1; 343 } 344 345 switch (reg & ATW_TEST0_EPTYP_MASK) { 346 case ATW_TEST0_EPTYP_93c66: 347 ATW_DPRINTF(("%s: 93c66 SROM\n", sc->sc_dev.dv_xname)); 348 sc->sc_sromsz = 512; 349 sd.sd_chip = C56_66; 350 break; 351 case ATW_TEST0_EPTYP_93c46: 352 ATW_DPRINTF(("%s: 93c46 SROM\n", sc->sc_dev.dv_xname)); 353 sc->sc_sromsz = 128; 354 sd.sd_chip = C46; 355 break; 356 default: 357 printf("%s: unknown SROM type %d\n", sc->sc_dev.dv_xname, 358 MASK_AND_RSHIFT(reg, ATW_TEST0_EPTYP_MASK)); 359 return -1; 360 } 361 362 sc->sc_srom = malloc(sc->sc_sromsz, M_DEVBUF, M_NOWAIT); 363 364 if (sc->sc_srom == NULL) { 365 printf("%s: unable to allocate SROM buffer\n", 366 sc->sc_dev.dv_xname); 367 return -1; 368 } 369 370 (void)memset(sc->sc_srom, 0, sc->sc_sromsz); 371 372 /* ADM8211 has a single 32-bit register for controlling the 373 * 93cx6 SROM. Bit SRS enables the serial port. There is no 374 * "ready" bit. The ADM8211 input/output sense is the reverse 375 * of read_seeprom's. 376 */ 377 sd.sd_tag = sc->sc_st; 378 sd.sd_bsh = sc->sc_sh; 379 sd.sd_regsize = 4; 380 sd.sd_control_offset = ATW_SPR; 381 sd.sd_status_offset = ATW_SPR; 382 sd.sd_dataout_offset = ATW_SPR; 383 sd.sd_CK = ATW_SPR_SCLK; 384 sd.sd_CS = ATW_SPR_SCS; 385 sd.sd_DI = ATW_SPR_SDO; 386 sd.sd_DO = ATW_SPR_SDI; 387 sd.sd_MS = ATW_SPR_SRS; 388 sd.sd_RDY = 0; 389 390 if (!read_seeprom(&sd, sc->sc_srom, 0, sc->sc_sromsz/2)) { 391 printf("%s: could not read SROM\n", sc->sc_dev.dv_xname); 392 free(sc->sc_srom, M_DEVBUF); 393 return -1; 394 } 395 #ifdef ATW_DEBUG 396 { 397 int i; 398 ATW_DPRINTF(("\nSerial EEPROM:\n\t")); 399 for (i = 0; i < sc->sc_sromsz/2; i = i + 1) { 400 if (((i % 8) == 0) && (i != 0)) { 401 ATW_DPRINTF(("\n\t")); 402 } 403 ATW_DPRINTF((" 0x%x", sc->sc_srom[i])); 404 } 405 ATW_DPRINTF(("\n")); 406 } 407 #endif /* ATW_DEBUG */ 408 return 0; 409 } 410 411 #ifdef ATW_DEBUG 412 static void 413 atw_print_regs(struct atw_softc *sc, const char *where) 414 { 415 #define PRINTREG(sc, reg) \ 416 ATW_DPRINTF2(("%s: reg[ " #reg " / %03x ] = %08x\n", \ 417 sc->sc_dev.dv_xname, reg, ATW_READ(sc, reg))) 418 419 ATW_DPRINTF2(("%s: %s\n", sc->sc_dev.dv_xname, where)); 420 421 PRINTREG(sc, ATW_PAR); 422 PRINTREG(sc, ATW_FRCTL); 423 PRINTREG(sc, ATW_TDR); 424 PRINTREG(sc, ATW_WTDP); 425 PRINTREG(sc, ATW_RDR); 426 PRINTREG(sc, ATW_WRDP); 427 PRINTREG(sc, ATW_RDB); 428 PRINTREG(sc, ATW_CSR3A); 429 PRINTREG(sc, ATW_TDBD); 430 PRINTREG(sc, ATW_TDBP); 431 PRINTREG(sc, ATW_STSR); 432 PRINTREG(sc, ATW_CSR5A); 433 PRINTREG(sc, ATW_NAR); 434 PRINTREG(sc, ATW_CSR6A); 435 PRINTREG(sc, ATW_IER); 436 PRINTREG(sc, ATW_CSR7A); 437 PRINTREG(sc, ATW_LPC); 438 PRINTREG(sc, ATW_TEST1); 439 PRINTREG(sc, ATW_SPR); 440 PRINTREG(sc, ATW_TEST0); 441 PRINTREG(sc, ATW_WCSR); 442 PRINTREG(sc, ATW_WPDR); 443 PRINTREG(sc, ATW_GPTMR); 444 PRINTREG(sc, ATW_GPIO); 445 PRINTREG(sc, ATW_BBPCTL); 446 PRINTREG(sc, ATW_SYNCTL); 447 PRINTREG(sc, ATW_PLCPHD); 448 PRINTREG(sc, ATW_MMIWADDR); 449 PRINTREG(sc, ATW_MMIRADDR1); 450 PRINTREG(sc, ATW_MMIRADDR2); 451 PRINTREG(sc, ATW_TXBR); 452 PRINTREG(sc, ATW_CSR15A); 453 PRINTREG(sc, ATW_ALCSTAT); 454 PRINTREG(sc, ATW_TOFS2); 455 PRINTREG(sc, ATW_CMDR); 456 PRINTREG(sc, ATW_PCIC); 457 PRINTREG(sc, ATW_PMCSR); 458 PRINTREG(sc, ATW_PAR0); 459 PRINTREG(sc, ATW_PAR1); 460 PRINTREG(sc, ATW_MAR0); 461 PRINTREG(sc, ATW_MAR1); 462 PRINTREG(sc, ATW_ATIMDA0); 463 PRINTREG(sc, ATW_ABDA1); 464 PRINTREG(sc, ATW_BSSID0); 465 PRINTREG(sc, ATW_TXLMT); 466 PRINTREG(sc, ATW_MIBCNT); 467 PRINTREG(sc, ATW_BCNT); 468 PRINTREG(sc, ATW_TSFTH); 469 PRINTREG(sc, ATW_TSC); 470 PRINTREG(sc, ATW_SYNRF); 471 PRINTREG(sc, ATW_BPLI); 472 PRINTREG(sc, ATW_CAP0); 473 PRINTREG(sc, ATW_CAP1); 474 PRINTREG(sc, ATW_RMD); 475 PRINTREG(sc, ATW_CFPP); 476 PRINTREG(sc, ATW_TOFS0); 477 PRINTREG(sc, ATW_TOFS1); 478 PRINTREG(sc, ATW_IFST); 479 PRINTREG(sc, ATW_RSPT); 480 PRINTREG(sc, ATW_TSFTL); 481 PRINTREG(sc, ATW_WEPCTL); 482 PRINTREG(sc, ATW_WESK); 483 PRINTREG(sc, ATW_WEPCNT); 484 PRINTREG(sc, ATW_MACTEST); 485 PRINTREG(sc, ATW_FER); 486 PRINTREG(sc, ATW_FEMR); 487 PRINTREG(sc, ATW_FPSR); 488 PRINTREG(sc, ATW_FFER); 489 #undef PRINTREG 490 } 491 #endif /* ATW_DEBUG */ 492 493 /* 494 * Finish attaching an ADMtek ADM8211 MAC. Called by bus-specific front-end. 495 */ 496 void 497 atw_attach(struct atw_softc *sc) 498 { 499 static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = { 500 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 501 }; 502 struct ieee80211com *ic = &sc->sc_ic; 503 struct ifnet *ifp = &ic->ic_if; 504 int country_code, error, i, nrate; 505 u_int32_t reg; 506 static const char *type_strings[] = {"Intersil (not supported)", 507 "RFMD", "Marvel (not supported)"}; 508 509 sc->sc_txth = atw_txthresh_tab_lo; 510 511 SIMPLEQ_INIT(&sc->sc_txfreeq); 512 SIMPLEQ_INIT(&sc->sc_txdirtyq); 513 514 #ifdef ATW_DEBUG 515 atw_print_regs(sc, "atw_attach"); 516 #endif /* ATW_DEBUG */ 517 518 /* 519 * Allocate the control data structures, and create and load the 520 * DMA map for it. 521 */ 522 if ((error = bus_dmamem_alloc(sc->sc_dmat, 523 sizeof(struct atw_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 524 1, &sc->sc_cdnseg, 0)) != 0) { 525 printf("%s: unable to allocate control data, error = %d\n", 526 sc->sc_dev.dv_xname, error); 527 goto fail_0; 528 } 529 530 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg, 531 sizeof(struct atw_control_data), (caddr_t *)&sc->sc_control_data, 532 BUS_DMA_COHERENT)) != 0) { 533 printf("%s: unable to map control data, error = %d\n", 534 sc->sc_dev.dv_xname, error); 535 goto fail_1; 536 } 537 538 if ((error = bus_dmamap_create(sc->sc_dmat, 539 sizeof(struct atw_control_data), 1, 540 sizeof(struct atw_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 541 printf("%s: unable to create control data DMA map, " 542 "error = %d\n", sc->sc_dev.dv_xname, error); 543 goto fail_2; 544 } 545 546 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 547 sc->sc_control_data, sizeof(struct atw_control_data), NULL, 548 0)) != 0) { 549 printf("%s: unable to load control data DMA map, error = %d\n", 550 sc->sc_dev.dv_xname, error); 551 goto fail_3; 552 } 553 554 /* 555 * Create the transmit buffer DMA maps. 556 */ 557 sc->sc_ntxsegs = ATW_NTXSEGS; 558 for (i = 0; i < ATW_TXQUEUELEN; i++) { 559 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 560 sc->sc_ntxsegs, MCLBYTES, 0, 0, 561 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 562 printf("%s: unable to create tx DMA map %d, " 563 "error = %d\n", sc->sc_dev.dv_xname, i, error); 564 goto fail_4; 565 } 566 } 567 568 /* 569 * Create the receive buffer DMA maps. 570 */ 571 for (i = 0; i < ATW_NRXDESC; i++) { 572 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 573 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 574 printf("%s: unable to create rx DMA map %d, " 575 "error = %d\n", sc->sc_dev.dv_xname, i, error); 576 goto fail_5; 577 } 578 } 579 for (i = 0; i < ATW_NRXDESC; i++) { 580 sc->sc_rxsoft[i].rxs_mbuf = NULL; 581 } 582 583 /* Reset the chip to a known state. */ 584 atw_reset(sc); 585 586 if (atw_read_srom(sc) == -1) 587 return; 588 589 sc->sc_rftype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 590 ATW_SR_RFTYPE_MASK); 591 592 sc->sc_bbptype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 593 ATW_SR_BBPTYPE_MASK); 594 595 if (sc->sc_rftype > sizeof(type_strings)/sizeof(type_strings[0])) { 596 printf("%s: unknown RF\n", sc->sc_dev.dv_xname); 597 return; 598 } 599 if (sc->sc_bbptype > sizeof(type_strings)/sizeof(type_strings[0])) { 600 printf("%s: unknown BBP\n", sc->sc_dev.dv_xname); 601 return; 602 } 603 604 printf("%s: %s RF, %s BBP", sc->sc_dev.dv_xname, 605 type_strings[sc->sc_rftype], type_strings[sc->sc_bbptype]); 606 607 /* XXX There exists a Linux driver which seems to use RFType = 0 for 608 * MARVEL. My bug, or theirs? 609 */ 610 611 reg = LSHIFT(sc->sc_rftype, ATW_SYNCTL_RFTYPE_MASK); 612 613 switch (sc->sc_rftype) { 614 case ATW_RFTYPE_INTERSIL: 615 reg |= ATW_SYNCTL_CS1; 616 break; 617 case ATW_RFTYPE_RFMD: 618 reg |= ATW_SYNCTL_CS0; 619 break; 620 case ATW_RFTYPE_MARVEL: 621 break; 622 } 623 624 sc->sc_synctl_rd = reg | ATW_SYNCTL_RD; 625 sc->sc_synctl_wr = reg | ATW_SYNCTL_WR; 626 627 reg = LSHIFT(sc->sc_bbptype, ATW_BBPCTL_TYPE_MASK); 628 629 switch (sc->sc_bbptype) { 630 case ATW_BBPTYPE_INTERSIL: 631 reg |= ATW_BBPCTL_TWI; 632 break; 633 case ATW_BBPTYPE_RFMD: 634 reg |= ATW_BBPCTL_RF3KADDR_ADDR | ATW_BBPCTL_NEGEDGE_DO | 635 ATW_BBPCTL_CCA_ACTLO; 636 break; 637 case ATW_BBPTYPE_MARVEL: 638 break; 639 case ATW_C_BBPTYPE_RFMD: 640 printf("%s: ADM8211C MAC/RFMD BBP not supported yet.\n", 641 sc->sc_dev.dv_xname); 642 break; 643 } 644 645 sc->sc_bbpctl_wr = reg | ATW_BBPCTL_WR; 646 sc->sc_bbpctl_rd = reg | ATW_BBPCTL_RD; 647 648 /* 649 * From this point forward, the attachment cannot fail. A failure 650 * before this point releases all resources that may have been 651 * allocated. 652 */ 653 sc->sc_flags |= ATWF_ATTACHED /* | ATWF_RTSCTS */; 654 655 ATW_DPRINTF((" SROM MAC %04x%04x%04x", 656 htole16(sc->sc_srom[ATW_SR_MAC00]), 657 htole16(sc->sc_srom[ATW_SR_MAC01]), 658 htole16(sc->sc_srom[ATW_SR_MAC10]))); 659 660 country_code = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CTRY_CR29], 661 ATW_SR_CTRY_MASK); 662 663 #define ADD_CHANNEL(_ic, _chan) do { \ 664 _ic->ic_channels[_chan].ic_flags = IEEE80211_CHAN_B; \ 665 _ic->ic_channels[_chan].ic_freq = \ 666 ieee80211_ieee2mhz(_chan, _ic->ic_channels[_chan].ic_flags);\ 667 } while (0) 668 669 /* Find available channels */ 670 switch (country_code) { 671 case COUNTRY_MMK2: /* 1-14 */ 672 ADD_CHANNEL(ic, 14); 673 /*FALLTHROUGH*/ 674 case COUNTRY_ETSI: /* 1-13 */ 675 for (i = 1; i <= 13; i++) 676 ADD_CHANNEL(ic, i); 677 break; 678 case COUNTRY_FCC: /* 1-11 */ 679 case COUNTRY_IC: /* 1-11 */ 680 for (i = 1; i <= 11; i++) 681 ADD_CHANNEL(ic, i); 682 break; 683 case COUNTRY_MMK: /* 14 */ 684 ADD_CHANNEL(ic, 14); 685 break; 686 case COUNTRY_FRANCE: /* 10-13 */ 687 for (i = 10; i <= 13; i++) 688 ADD_CHANNEL(ic, i); 689 break; 690 default: /* assume channels 10-11 */ 691 case COUNTRY_SPAIN: /* 10-11 */ 692 for (i = 10; i <= 11; i++) 693 ADD_CHANNEL(ic, i); 694 break; 695 } 696 697 /* Read the MAC address. */ 698 reg = ATW_READ(sc, ATW_PAR0); 699 ic->ic_myaddr[0] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB0_MASK); 700 ic->ic_myaddr[1] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB1_MASK); 701 ic->ic_myaddr[2] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB2_MASK); 702 ic->ic_myaddr[3] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB3_MASK); 703 reg = ATW_READ(sc, ATW_PAR1); 704 ic->ic_myaddr[4] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB4_MASK); 705 ic->ic_myaddr[5] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB5_MASK); 706 707 if (IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) { 708 printf(" could not get mac address, attach failed\n"); 709 return; 710 } 711 712 printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr)); 713 714 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 715 ifp->if_softc = sc; 716 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST | 717 IFF_NOTRAILERS; 718 ifp->if_ioctl = atw_ioctl; 719 ifp->if_start = atw_start; 720 ifp->if_watchdog = atw_watchdog; 721 ifp->if_init = atw_init; 722 ifp->if_stop = atw_stop; 723 IFQ_SET_READY(&ifp->if_snd); 724 725 ic->ic_phytype = IEEE80211_T_DS; 726 ic->ic_opmode = IEEE80211_M_STA; 727 ic->ic_caps = IEEE80211_C_PMGT | IEEE80211_C_IBSS | 728 IEEE80211_C_HOSTAP | IEEE80211_C_MONITOR | IEEE80211_C_WEP; 729 730 nrate = 0; 731 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 2; 732 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 4; 733 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 11; 734 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 22; 735 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate; 736 737 /* 738 * Call MI attach routines. 739 */ 740 741 if_attach(ifp); 742 ieee80211_ifattach(ifp); 743 744 sc->sc_newstate = ic->ic_newstate; 745 ic->ic_newstate = atw_newstate; 746 747 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 748 ic->ic_recv_mgmt = atw_recv_mgmt; 749 750 sc->sc_node_free = ic->ic_node_free; 751 ic->ic_node_free = atw_node_free; 752 753 sc->sc_node_alloc = ic->ic_node_alloc; 754 ic->ic_node_alloc = atw_node_alloc; 755 756 /* possibly we should fill in our own sc_send_prresp, since 757 * the ADM8211 is probably sending probe responses in ad hoc 758 * mode. 759 */ 760 761 /* complete initialization */ 762 ieee80211_media_init(ifp, atw_media_change, atw_media_status); 763 callout_init(&sc->sc_scan_ch); 764 765 #if NBPFILTER > 0 766 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 767 sizeof(struct ieee80211_frame) + 64, &sc->sc_radiobpf); 768 #endif 769 770 /* 771 * Make sure the interface is shutdown during reboot. 772 */ 773 sc->sc_sdhook = shutdownhook_establish(atw_shutdown, sc); 774 if (sc->sc_sdhook == NULL) 775 printf("%s: WARNING: unable to establish shutdown hook\n", 776 sc->sc_dev.dv_xname); 777 778 /* 779 * Add a suspend hook to make sure we come back up after a 780 * resume. 781 */ 782 sc->sc_powerhook = powerhook_establish(atw_power, sc); 783 if (sc->sc_powerhook == NULL) 784 printf("%s: WARNING: unable to establish power hook\n", 785 sc->sc_dev.dv_xname); 786 787 memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu)); 788 sc->sc_rxtap.ar_ihdr.it_len = sizeof(sc->sc_rxtapu); 789 sc->sc_rxtap.ar_ihdr.it_present = ATW_RX_RADIOTAP_PRESENT; 790 791 memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu)); 792 sc->sc_txtap.at_ihdr.it_len = sizeof(sc->sc_txtapu); 793 sc->sc_txtap.at_ihdr.it_present = ATW_TX_RADIOTAP_PRESENT; 794 795 return; 796 797 /* 798 * Free any resources we've allocated during the failed attach 799 * attempt. Do this in reverse order and fall through. 800 */ 801 fail_5: 802 for (i = 0; i < ATW_NRXDESC; i++) { 803 if (sc->sc_rxsoft[i].rxs_dmamap == NULL) 804 continue; 805 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxsoft[i].rxs_dmamap); 806 } 807 fail_4: 808 for (i = 0; i < ATW_TXQUEUELEN; i++) { 809 if (sc->sc_txsoft[i].txs_dmamap == NULL) 810 continue; 811 bus_dmamap_destroy(sc->sc_dmat, sc->sc_txsoft[i].txs_dmamap); 812 } 813 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 814 fail_3: 815 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 816 fail_2: 817 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 818 sizeof(struct atw_control_data)); 819 fail_1: 820 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 821 fail_0: 822 return; 823 } 824 825 static struct ieee80211_node * 826 atw_node_alloc(struct ieee80211com *ic) 827 { 828 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 829 struct ieee80211_node *ni = (*sc->sc_node_alloc)(ic); 830 831 DPRINTF(sc, ("%s: alloc node %p\n", sc->sc_dev.dv_xname, ni)); 832 return ni; 833 } 834 835 static void 836 atw_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 837 { 838 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 839 840 DPRINTF(sc, ("%s: freeing node %p %s\n", sc->sc_dev.dv_xname, ni, 841 ether_sprintf(ni->ni_bssid))); 842 (*sc->sc_node_free)(ic, ni); 843 } 844 845 /* 846 * atw_reset: 847 * 848 * Perform a soft reset on the ADM8211. 849 */ 850 void 851 atw_reset(struct atw_softc *sc) 852 { 853 int i; 854 855 ATW_WRITE(sc, ATW_PAR, ATW_PAR_SWR); 856 857 for (i = 0; i < 10000; i++) { 858 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR) == 0) 859 break; 860 DELAY(1); 861 } 862 863 DPRINTF2(sc, ("%s: atw_reset %d iterations\n", sc->sc_dev.dv_xname, i)); 864 865 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR)) 866 printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname); 867 868 /* Turn off maximum power saving. */ 869 ATW_CLR(sc, ATW_FRCTL, ATW_FRCTL_MAXPSP); 870 871 /* Recall EEPROM. */ 872 ATW_SET(sc, ATW_TEST0, ATW_TEST0_EPRLD); 873 874 DELAY(10 * 1000); 875 876 /* A reset seems to affect the SRAM contents, so put them into 877 * a known state. 878 */ 879 atw_clear_sram(sc); 880 881 memset(sc->sc_bssid, 0, sizeof(sc->sc_bssid)); 882 } 883 884 static void 885 atw_clear_sram(struct atw_softc *sc) 886 { 887 memset(sc->sc_sram, 0, sizeof(sc->sc_sram)); 888 /* XXX not for revision 0x20. */ 889 atw_write_sram(sc, 0, sc->sc_sram, sizeof(sc->sc_sram)); 890 } 891 892 /* TBD atw_init 893 * 894 * set MAC based on ic->ic_bss->myaddr 895 * write WEP keys 896 * set TX rate 897 */ 898 899 /* 900 * atw_init: [ ifnet interface function ] 901 * 902 * Initialize the interface. Must be called at splnet(). 903 */ 904 int 905 atw_init(struct ifnet *ifp) 906 { 907 struct atw_softc *sc = ifp->if_softc; 908 struct ieee80211com *ic = &sc->sc_ic; 909 struct atw_txsoft *txs; 910 struct atw_rxsoft *rxs; 911 u_int32_t reg; 912 int i, error = 0; 913 914 if ((error = atw_enable(sc)) != 0) 915 goto out; 916 917 /* 918 * Cancel any pending I/O. This also resets. 919 */ 920 atw_stop(ifp, 0); 921 922 ic->ic_bss->ni_chan = ic->ic_ibss_chan; 923 DPRINTF(sc, ("%s: channel %d freq %d flags 0x%04x\n", 924 __func__, ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 925 ic->ic_bss->ni_chan->ic_freq, ic->ic_bss->ni_chan->ic_flags)); 926 927 /* Turn off APM??? (A binary-only driver does this.) 928 * 929 * Set Rx store-and-forward mode. 930 */ 931 reg = ATW_READ(sc, ATW_CMDR); 932 reg &= ~ATW_CMDR_APM; 933 reg &= ~ATW_CMDR_DRT_MASK; 934 reg |= ATW_CMDR_RTE | LSHIFT(0x2, ATW_CMDR_DRT_MASK); 935 936 ATW_WRITE(sc, ATW_CMDR, reg); 937 938 /* Set data rate for PLCP Signal field, 1Mbps = 10 x 100Kb/s. 939 * 940 * XXX a binary-only driver sets a different service field than 941 * 0. why? 942 */ 943 reg = ATW_READ(sc, ATW_PLCPHD); 944 reg &= ~(ATW_PLCPHD_SERVICE_MASK|ATW_PLCPHD_SIGNAL_MASK); 945 reg |= LSHIFT(10, ATW_PLCPHD_SIGNAL_MASK) | 946 LSHIFT(0xb0, ATW_PLCPHD_SERVICE_MASK); 947 ATW_WRITE(sc, ATW_PLCPHD, reg); 948 949 /* XXX this magic can probably be figured out from the RFMD docs */ 950 reg = LSHIFT(4, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 951 LSHIFT(13, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 952 LSHIFT(8, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 953 LSHIFT(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 954 LSHIFT(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 955 LSHIFT(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 956 LSHIFT(4, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 957 LSHIFT(5, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 958 ATW_WRITE(sc, ATW_TOFS2, reg); 959 960 ATW_WRITE(sc, ATW_TXLMT, LSHIFT(512, ATW_TXLMT_MTMLT_MASK) | 961 LSHIFT(224, ATW_TXLMT_SRTYLIM_MASK)); 962 963 /* XXX this resets an Intersil RF front-end? */ 964 /* TBD condition on Intersil RFType? */ 965 ATW_WRITE(sc, ATW_SYNRF, ATW_SYNRF_INTERSIL_EN); 966 DELAY(10 * 1000); 967 ATW_WRITE(sc, ATW_SYNRF, 0); 968 DELAY(5 * 1000); 969 970 /* 16 TU max duration for contention-free period */ 971 reg = ATW_READ(sc, ATW_CFPP) & ~ATW_CFPP_CFPMD; 972 ATW_WRITE(sc, ATW_CFPP, reg | LSHIFT(16, ATW_CFPP_CFPMD)); 973 974 /* XXX I guess that the Cardbus clock is 22MHz? 975 * I am assuming that the role of ATW_TOFS0_USCNT is 976 * to divide the bus clock to get a 1MHz clock---the datasheet is not 977 * very clear on this point. It says in the datasheet that it is 978 * possible for the ADM8211 to accomodate bus speeds between 22MHz 979 * and 33MHz; maybe this is the way? I see a binary-only driver write 980 * these values. These values are also the power-on default. 981 */ 982 ATW_WRITE(sc, ATW_TOFS0, 983 LSHIFT(22, ATW_TOFS0_USCNT_MASK) | 984 ATW_TOFS0_TUCNT_MASK /* set all bits in TUCNT */); 985 986 /* Initialize interframe spacing. EIFS=0x64 is used by a binary-only 987 * driver. Go figure. 988 */ 989 reg = LSHIFT(IEEE80211_DUR_DS_SLOT, ATW_IFST_SLOT_MASK) | 990 LSHIFT(22 * IEEE80211_DUR_DS_SIFS /* # of 22MHz cycles */, 991 ATW_IFST_SIFS_MASK) | 992 LSHIFT(IEEE80211_DUR_DS_DIFS, ATW_IFST_DIFS_MASK) | 993 LSHIFT(0x64 /* IEEE80211_DUR_DS_EIFS */, ATW_IFST_EIFS_MASK); 994 995 ATW_WRITE(sc, ATW_IFST, reg); 996 997 /* XXX More magic. Might relate to ACK timing. */ 998 ATW_WRITE(sc, ATW_RSPT, LSHIFT(0xffff, ATW_RSPT_MART_MASK) | 999 LSHIFT(0xff, ATW_RSPT_MIRT_MASK)); 1000 1001 /* Set up the MMI read/write addresses for the BBP. 1002 * 1003 * TBD find out the Marvel settings. 1004 */ 1005 switch (sc->sc_bbptype) { 1006 case ATW_BBPTYPE_INTERSIL: 1007 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_INTERSIL); 1008 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_INTERSIL); 1009 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_INTERSIL); 1010 break; 1011 case ATW_BBPTYPE_MARVEL: 1012 break; 1013 case ATW_BBPTYPE_RFMD: 1014 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_RFMD); 1015 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_RFMD); 1016 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_RFMD); 1017 default: 1018 break; 1019 } 1020 1021 sc->sc_wepctl = 0; 1022 ATW_WRITE(sc, ATW_MACTEST, ATW_MACTEST_MMI_USETXCLK); 1023 1024 if ((error = atw_rf3000_init(sc)) != 0) 1025 goto out; 1026 1027 /* 1028 * Initialize the PCI Access Register. 1029 */ 1030 sc->sc_busmode = ATW_PAR_BAR; /* XXX what is this? */ 1031 1032 /* 1033 * If we're allowed to do so, use Memory Read Line 1034 * and Memory Read Multiple. 1035 * 1036 * XXX Should we use Memory Write and Invalidate? 1037 */ 1038 if (sc->sc_flags & ATWF_MRL) 1039 sc->sc_busmode |= ATW_PAR_MRLE; 1040 if (sc->sc_flags & ATWF_MRM) 1041 sc->sc_busmode |= ATW_PAR_MRME; 1042 if (sc->sc_flags & ATWF_MWI) 1043 sc->sc_busmode |= ATW_PAR_MWIE; 1044 if (sc->sc_maxburst == 0) 1045 sc->sc_maxburst = 8; /* ADM8211 default */ 1046 1047 switch (sc->sc_cacheline) { 1048 default: 1049 /* Use burst length. */ 1050 break; 1051 case 8: 1052 sc->sc_busmode |= ATW_PAR_CAL_8DW; 1053 break; 1054 case 16: 1055 sc->sc_busmode |= ATW_PAR_CAL_16DW; 1056 break; 1057 case 32: 1058 sc->sc_busmode |= ATW_PAR_CAL_32DW; 1059 break; 1060 } 1061 switch (sc->sc_maxburst) { 1062 case 1: 1063 sc->sc_busmode |= ATW_PAR_PBL_1DW; 1064 break; 1065 case 2: 1066 sc->sc_busmode |= ATW_PAR_PBL_2DW; 1067 break; 1068 case 4: 1069 sc->sc_busmode |= ATW_PAR_PBL_4DW; 1070 break; 1071 case 8: 1072 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1073 break; 1074 case 16: 1075 sc->sc_busmode |= ATW_PAR_PBL_16DW; 1076 break; 1077 case 32: 1078 sc->sc_busmode |= ATW_PAR_PBL_32DW; 1079 break; 1080 default: 1081 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1082 break; 1083 } 1084 1085 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 1086 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1087 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1088 1089 /* 1090 * Initialize the OPMODE register. We don't write it until 1091 * we're ready to begin the transmit and receive processes. 1092 */ 1093 sc->sc_opmode = ATW_NAR_SR | ATW_NAR_ST | 1094 sc->sc_txth[sc->sc_txthresh].txth_opmode; 1095 1096 /* 1097 * Initialize the transmit descriptor ring. 1098 */ 1099 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1100 for (i = 0; i < ATW_NTXDESC; i++) { 1101 sc->sc_txdescs[i].at_ctl = 0; 1102 /* no transmit chaining */ 1103 sc->sc_txdescs[i].at_flags = 0 /* ATW_TXFLAG_TCH */; 1104 sc->sc_txdescs[i].at_buf2 = 1105 htole32(ATW_CDTXADDR(sc, ATW_NEXTTX(i))); 1106 } 1107 /* use ring mode */ 1108 sc->sc_txdescs[ATW_NTXDESC - 1].at_flags |= htole32(ATW_TXFLAG_TER); 1109 ATW_CDTXSYNC(sc, 0, ATW_NTXDESC, 1110 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1111 sc->sc_txfree = ATW_NTXDESC; 1112 sc->sc_txnext = 0; 1113 1114 /* 1115 * Initialize the transmit job descriptors. 1116 */ 1117 SIMPLEQ_INIT(&sc->sc_txfreeq); 1118 SIMPLEQ_INIT(&sc->sc_txdirtyq); 1119 for (i = 0; i < ATW_TXQUEUELEN; i++) { 1120 txs = &sc->sc_txsoft[i]; 1121 txs->txs_mbuf = NULL; 1122 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1123 } 1124 1125 /* 1126 * Initialize the receive descriptor and receive job 1127 * descriptor rings. 1128 */ 1129 for (i = 0; i < ATW_NRXDESC; i++) { 1130 rxs = &sc->sc_rxsoft[i]; 1131 if (rxs->rxs_mbuf == NULL) { 1132 if ((error = atw_add_rxbuf(sc, i)) != 0) { 1133 printf("%s: unable to allocate or map rx " 1134 "buffer %d, error = %d\n", 1135 sc->sc_dev.dv_xname, i, error); 1136 /* 1137 * XXX Should attempt to run with fewer receive 1138 * XXX buffers instead of just failing. 1139 */ 1140 atw_rxdrain(sc); 1141 goto out; 1142 } 1143 } else 1144 ATW_INIT_RXDESC(sc, i); 1145 } 1146 sc->sc_rxptr = 0; 1147 1148 /* disable all wake-up events */ 1149 ATW_CLR(sc, ATW_WCSR, ATW_WCSR_WP1E|ATW_WCSR_WP2E|ATW_WCSR_WP3E| 1150 ATW_WCSR_WP4E|ATW_WCSR_WP5E|ATW_WCSR_TSFTWE| 1151 ATW_WCSR_TIMWE|ATW_WCSR_ATIMWE|ATW_WCSR_KEYWE| 1152 ATW_WCSR_WFRE|ATW_WCSR_MPRE|ATW_WCSR_LSOE); 1153 1154 /* ack all wake-up events */ 1155 ATW_SET(sc, ATW_WCSR, 0); 1156 1157 /* 1158 * Initialize the interrupt mask and enable interrupts. 1159 */ 1160 /* normal interrupts */ 1161 sc->sc_inten = ATW_INTR_TCI | ATW_INTR_TDU | ATW_INTR_RCI | 1162 ATW_INTR_NISS | ATW_INTR_LINKON | ATW_INTR_BCNTC; 1163 1164 /* abnormal interrupts */ 1165 sc->sc_inten |= ATW_INTR_TPS | ATW_INTR_TLT | ATW_INTR_TRT | 1166 ATW_INTR_TUF | ATW_INTR_RDU | ATW_INTR_RPS | ATW_INTR_AISS | 1167 ATW_INTR_FBE | ATW_INTR_LINKOFF | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1168 1169 sc->sc_linkint_mask = ATW_INTR_LINKON | ATW_INTR_LINKOFF | 1170 ATW_INTR_BCNTC | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1171 sc->sc_rxint_mask = ATW_INTR_RCI | ATW_INTR_RDU; 1172 sc->sc_txint_mask = ATW_INTR_TCI | ATW_INTR_TUF | ATW_INTR_TLT | 1173 ATW_INTR_TRT; 1174 1175 sc->sc_linkint_mask &= sc->sc_inten; 1176 sc->sc_rxint_mask &= sc->sc_inten; 1177 sc->sc_txint_mask &= sc->sc_inten; 1178 1179 ATW_WRITE(sc, ATW_IER, sc->sc_inten); 1180 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1181 if (sc->sc_intr_ack != NULL) 1182 (*sc->sc_intr_ack)(sc); 1183 1184 DPRINTF(sc, ("%s: ATW_IER %08x, inten %08x\n", 1185 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_IER), sc->sc_inten)); 1186 1187 /* 1188 * Give the transmit and receive rings to the ADM8211. 1189 */ 1190 ATW_WRITE(sc, ATW_TDBD, ATW_CDTXADDR(sc, sc->sc_txnext)); 1191 ATW_WRITE(sc, ATW_RDB, ATW_CDRXADDR(sc, sc->sc_rxptr)); 1192 1193 /* common 802.11 configuration */ 1194 ic->ic_flags &= ~IEEE80211_F_IBSSON; 1195 switch (ic->ic_opmode) { 1196 case IEEE80211_M_STA: 1197 break; 1198 case IEEE80211_M_AHDEMO: /* XXX */ 1199 case IEEE80211_M_IBSS: 1200 ic->ic_flags |= IEEE80211_F_IBSSON; 1201 /*FALLTHROUGH*/ 1202 case IEEE80211_M_HOSTAP: /* XXX */ 1203 break; 1204 case IEEE80211_M_MONITOR: /* XXX */ 1205 break; 1206 } 1207 1208 atw_start_beacon(sc, 0); 1209 1210 switch (ic->ic_opmode) { 1211 case IEEE80211_M_AHDEMO: 1212 case IEEE80211_M_HOSTAP: 1213 ic->ic_bss->ni_intval = ic->ic_lintval; 1214 ic->ic_bss->ni_rssi = 0; 1215 ic->ic_bss->ni_rstamp = 0; 1216 break; 1217 default: /* XXX */ 1218 break; 1219 } 1220 1221 atw_write_ssid(sc); 1222 atw_write_sup_rates(sc); 1223 if (ic->ic_caps & IEEE80211_C_WEP) 1224 atw_write_wep(sc); 1225 1226 /* 1227 * Set the receive filter. This will start the transmit and 1228 * receive processes. 1229 */ 1230 atw_filter_setup(sc); 1231 1232 /* 1233 * Start the receive process. 1234 */ 1235 ATW_WRITE(sc, ATW_RDR, 0x1); 1236 1237 /* 1238 * Note that the interface is now running. 1239 */ 1240 ifp->if_flags |= IFF_RUNNING; 1241 ifp->if_flags &= ~IFF_OACTIVE; 1242 ic->ic_state = IEEE80211_S_INIT; 1243 1244 if (ic->ic_opmode != IEEE80211_M_MONITOR) 1245 error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1246 else 1247 error = ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1248 out: 1249 if (error) { 1250 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1251 ifp->if_timer = 0; 1252 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1253 } 1254 #ifdef ATW_DEBUG 1255 atw_print_regs(sc, "end of init"); 1256 #endif /* ATW_DEBUG */ 1257 1258 return (error); 1259 } 1260 1261 /* enable == 1: host control of RF3000/Si4126 through ATW_SYNCTL. 1262 * 0: MAC control of RF3000/Si4126. 1263 * 1264 * Applies power, or selects RF front-end? Sets reset condition. 1265 * 1266 * TBD support non-RFMD BBP, non-SiLabs synth. 1267 */ 1268 static void 1269 atw_rfio_enable(struct atw_softc *sc, int enable) 1270 { 1271 if (enable) { 1272 ATW_WRITE(sc, ATW_SYNRF, 1273 ATW_SYNRF_SELRF|ATW_SYNRF_PE1|ATW_SYNRF_PHYRST); 1274 DELAY(atw_rfio_enable_delay); 1275 } else { 1276 ATW_WRITE(sc, ATW_SYNRF, 0); 1277 DELAY(atw_rfio_disable_delay); /* shorter for some reason */ 1278 } 1279 } 1280 1281 static int 1282 atw_tune(struct atw_softc *sc) 1283 { 1284 int rc; 1285 u_int32_t reg; 1286 int chan; 1287 struct ieee80211com *ic = &sc->sc_ic; 1288 1289 chan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 1290 if (chan == IEEE80211_CHAN_ANY) 1291 panic("%s: chan == IEEE80211_CHAN_ANY\n", __func__); 1292 1293 if (chan == sc->sc_cur_chan) 1294 return 0; 1295 1296 DPRINTF(sc, ("%s: chan %d -> %d\n", sc->sc_dev.dv_xname, 1297 sc->sc_cur_chan, chan)); 1298 1299 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1300 1301 if ((rc = atw_si4126_tune(sc, chan)) != 0 || 1302 (rc = atw_rf3000_tune(sc, chan)) != 0) 1303 printf("%s: failed to tune channel %d\n", sc->sc_dev.dv_xname, 1304 chan); 1305 1306 reg = ATW_READ(sc, ATW_CAP0) & ~ATW_CAP0_CHN_MASK; 1307 ATW_WRITE(sc, ATW_CAP0, 1308 reg | LSHIFT(chan, ATW_CAP0_CHN_MASK)); 1309 1310 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1311 1312 if (rc == 0) 1313 sc->sc_cur_chan = chan; 1314 1315 return rc; 1316 } 1317 1318 #ifdef ATW_DEBUG 1319 static void 1320 atw_si4126_print(struct atw_softc *sc) 1321 { 1322 struct ifnet *ifp = &sc->sc_ic.ic_if; 1323 u_int addr, val; 1324 1325 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1326 return; 1327 1328 for (addr = 0; addr <= 8; addr++) { 1329 printf("%s: synth[%d] = ", sc->sc_dev.dv_xname, addr); 1330 if (atw_si4126_read(sc, addr, &val) == 0) { 1331 printf("<unknown> (quitting print-out)\n"); 1332 break; 1333 } 1334 printf("%05x\n", val); 1335 } 1336 } 1337 #endif /* ATW_DEBUG */ 1338 1339 /* Tune to channel chan by adjusting the Si4126 RF/IF synthesizer. 1340 * 1341 * The RF/IF synthesizer produces two reference frequencies for 1342 * the RF2948B transceiver. The first frequency the RF2948B requires 1343 * is two times the so-called "intermediate frequency" (IF). Since 1344 * a SAW filter on the radio fixes the IF at 374MHz, I program the 1345 * Si4126 to generate IF LO = 374MHz x 2 = 748MHz. The second 1346 * frequency required by the transceiver is the radio frequency 1347 * (RF). This is a superheterodyne transceiver; for f(chan) the 1348 * center frequency of the channel we are tuning, RF = f(chan) - 1349 * IF. 1350 * 1351 * XXX I am told by SiLabs that the Si4126 will accept a broader range 1352 * of XIN than the 2-25MHz mentioned by the datasheet, even *without* 1353 * XINDIV2 = 1. I've tried this (it is necessary to double R) and it 1354 * works, but I have still programmed for XINDIV2 = 1 to be safe. 1355 */ 1356 static int 1357 atw_si4126_tune(struct atw_softc *sc, u_int8_t chan) 1358 { 1359 int rc = 0; 1360 u_int mhz; 1361 u_int R; 1362 u_int32_t reg; 1363 u_int16_t gain; 1364 1365 #ifdef ATW_DEBUG 1366 atw_si4126_print(sc); 1367 #endif /* ATW_DEBUG */ 1368 1369 if (chan == 14) 1370 mhz = 2484; 1371 else 1372 mhz = 2412 + 5 * (chan - 1); 1373 1374 /* Tune IF to 748MHz to suit the IF LO input of the 1375 * RF2494B, which is 2 x IF. No need to set an IF divider 1376 * because an IF in 526MHz - 952MHz is allowed. 1377 * 1378 * XIN is 44.000MHz, so divide it by two to get allowable 1379 * range of 2-25MHz. SiLabs tells me that this is not 1380 * strictly necessary. 1381 */ 1382 1383 R = 44; 1384 1385 atw_rfio_enable(sc, 1); 1386 1387 /* Power-up RF, IF synthesizers. */ 1388 if ((rc = atw_si4126_write(sc, SI4126_POWER, 1389 SI4126_POWER_PDIB|SI4126_POWER_PDRB)) != 0) 1390 goto out; 1391 1392 /* If RF2 N > 2047, then set KP2 to 1. */ 1393 gain = LSHIFT(((mhz - 374) > 2047) ? 1 : 0, SI4126_GAIN_KP2_MASK); 1394 1395 if ((rc = atw_si4126_write(sc, SI4126_GAIN, gain)) != 0) 1396 goto out; 1397 1398 /* set LPWR, too? */ 1399 if ((rc = atw_si4126_write(sc, SI4126_MAIN, 1400 SI4126_MAIN_XINDIV2)) != 0) 1401 goto out; 1402 1403 /* We set XINDIV2 = 1, so IF = N/(2 * R) * XIN. XIN = 44MHz. 1404 * I choose N = 1496, R = 44 so that 1496/(2 * 44) * 44MHz = 748MHz. 1405 */ 1406 if ((rc = atw_si4126_write(sc, SI4126_IFN, 1496)) != 0) 1407 goto out; 1408 1409 if ((rc = atw_si4126_write(sc, SI4126_IFR, R)) != 0) 1410 goto out; 1411 1412 /* Set RF1 arbitrarily. DO NOT configure RF1 after RF2, because 1413 * then RF1 becomes the active RF synthesizer, even on the Si4126, 1414 * which has no RF1! 1415 */ 1416 if ((rc = atw_si4126_write(sc, SI4126_RF1R, R)) != 0) 1417 goto out; 1418 1419 if ((rc = atw_si4126_write(sc, SI4126_RF1N, mhz - 374)) != 0) 1420 goto out; 1421 1422 /* N/R * XIN = RF. XIN = 44MHz. We desire RF = mhz - IF, 1423 * where IF = 374MHz. Let's divide XIN to 1MHz. So R = 44. 1424 * Now let's multiply it to mhz. So mhz - IF = N. 1425 */ 1426 if ((rc = atw_si4126_write(sc, SI4126_RF2R, R)) != 0) 1427 goto out; 1428 1429 if ((rc = atw_si4126_write(sc, SI4126_RF2N, mhz - 374)) != 0) 1430 goto out; 1431 1432 /* wait 100us from power-up for RF, IF to settle */ 1433 DELAY(100); 1434 1435 if ((sc->sc_if.if_flags & IFF_LINK1) == 0 || chan == 14) { 1436 /* XXX there is a binary driver which sends 1437 * ATW_GPIO_EN_MASK = 1, ATW_GPIO_O_MASK = 1. I had speculated 1438 * that this enables the Si4126 by raising its PWDN#, but I 1439 * think that it actually sets the Prism RF front-end 1440 * to a special mode for channel 14. 1441 */ 1442 reg = ATW_READ(sc, ATW_GPIO); 1443 reg &= ~(ATW_GPIO_EN_MASK|ATW_GPIO_O_MASK|ATW_GPIO_I_MASK); 1444 reg |= LSHIFT(1, ATW_GPIO_EN_MASK) | LSHIFT(1, ATW_GPIO_O_MASK); 1445 ATW_WRITE(sc, ATW_GPIO, reg); 1446 } 1447 1448 #ifdef ATW_DEBUG 1449 atw_si4126_print(sc); 1450 #endif /* ATW_DEBUG */ 1451 1452 out: 1453 atw_rfio_enable(sc, 0); 1454 1455 return rc; 1456 } 1457 1458 /* Baseline initialization of RF3000 BBP: set CCA mode and enable antenna 1459 * diversity. 1460 * 1461 * Call this w/ Tx/Rx suspended. 1462 */ 1463 static int 1464 atw_rf3000_init(struct atw_softc *sc) 1465 { 1466 int rc = 0; 1467 1468 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1469 1470 atw_rfio_enable(sc, 1); 1471 1472 /* enable diversity */ 1473 rc = atw_rf3000_write(sc, RF3000_DIVCTL, RF3000_DIVCTL_ENABLE); 1474 1475 if (rc != 0) 1476 goto out; 1477 1478 /* sensible setting from a binary-only driver */ 1479 rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1480 LSHIFT(0x1d, RF3000_GAINCTL_TXVGC_MASK)); 1481 1482 if (rc != 0) 1483 goto out; 1484 1485 /* magic from a binary-only driver */ 1486 rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, 1487 LSHIFT(0x38, RF3000_LOGAINCAL_CAL_MASK)); 1488 1489 if (rc != 0) 1490 goto out; 1491 1492 rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, RF3000_HIGAINCAL_DSSSPAD); 1493 1494 if (rc != 0) 1495 goto out; 1496 1497 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, 0x0); 1498 1499 if (rc != 0) 1500 goto out; 1501 1502 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, RF3000_OPTIONS2_LNAGS_DELAY); 1503 1504 if (rc != 0) 1505 goto out; 1506 1507 /* CCA is acquisition sensitive */ 1508 rc = atw_rf3000_write(sc, RF3000_CCACTL, 1509 LSHIFT(RF3000_CCACTL_MODE_ACQ, RF3000_CCACTL_MODE_MASK)); 1510 1511 if (rc != 0) 1512 goto out; 1513 1514 out: 1515 atw_rfio_enable(sc, 0); 1516 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1517 return rc; 1518 } 1519 1520 #ifdef ATW_DEBUG 1521 static void 1522 atw_rf3000_print(struct atw_softc *sc) 1523 { 1524 struct ifnet *ifp = &sc->sc_ic.ic_if; 1525 u_int addr, val; 1526 1527 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1528 return; 1529 1530 for (addr = 0x01; addr <= 0x15; addr++) { 1531 printf("%s: bbp[%d] = \n", sc->sc_dev.dv_xname, addr); 1532 if (atw_rf3000_read(sc, addr, &val) != 0) { 1533 printf("<unknown> (quitting print-out)\n"); 1534 break; 1535 } 1536 printf("%08x\n", val); 1537 } 1538 } 1539 #endif /* ATW_DEBUG */ 1540 1541 /* Set the power settings on the BBP for channel `chan'. */ 1542 static int 1543 atw_rf3000_tune(struct atw_softc *sc, u_int8_t chan) 1544 { 1545 int rc = 0; 1546 u_int32_t reg; 1547 u_int16_t txpower, lpf_cutoff, lna_gs_thresh; 1548 1549 txpower = sc->sc_srom[ATW_SR_TXPOWER(chan)]; 1550 lpf_cutoff = sc->sc_srom[ATW_SR_LPF_CUTOFF(chan)]; 1551 lna_gs_thresh = sc->sc_srom[ATW_SR_LNA_GS_THRESH(chan)]; 1552 1553 /* odd channels: LSB, even channels: MSB */ 1554 if (chan % 2 == 1) { 1555 txpower &= 0xFF; 1556 lpf_cutoff &= 0xFF; 1557 lna_gs_thresh &= 0xFF; 1558 } else { 1559 txpower >>= 8; 1560 lpf_cutoff >>= 8; 1561 lna_gs_thresh >>= 8; 1562 } 1563 1564 #ifdef ATW_DEBUG 1565 atw_rf3000_print(sc); 1566 #endif /* ATW_DEBUG */ 1567 1568 DPRINTF(sc, ("%s: chan %d txpower %02x, lpf_cutoff %02x, " 1569 "lna_gs_thresh %02x\n", 1570 sc->sc_dev.dv_xname, chan, txpower, lpf_cutoff, lna_gs_thresh)); 1571 1572 atw_rfio_enable(sc, 1); 1573 1574 if ((rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1575 LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK))) != 0) 1576 goto out; 1577 1578 if ((rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, lpf_cutoff)) != 0) 1579 goto out; 1580 1581 if ((rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, lna_gs_thresh)) != 0) 1582 goto out; 1583 1584 /* from a binary-only driver. */ 1585 reg = ATW_READ(sc, ATW_PLCPHD); 1586 reg &= ~ATW_PLCPHD_SERVICE_MASK; 1587 reg |= LSHIFT(LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK), 1588 ATW_PLCPHD_SERVICE_MASK); 1589 ATW_WRITE(sc, ATW_PLCPHD, reg); 1590 1591 #ifdef ATW_DEBUG 1592 atw_rf3000_print(sc); 1593 #endif /* ATW_DEBUG */ 1594 1595 out: 1596 atw_rfio_enable(sc, 0); 1597 1598 return rc; 1599 } 1600 1601 /* Write a register on the RF3000 baseband processor using the 1602 * registers provided by the ADM8211 for this purpose. 1603 * 1604 * Return 0 on success. 1605 */ 1606 static int 1607 atw_rf3000_write(struct atw_softc *sc, u_int addr, u_int val) 1608 { 1609 u_int32_t reg; 1610 int i; 1611 1612 for (i = 1000; --i >= 0; ) { 1613 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1614 break; 1615 DELAY(100); 1616 } 1617 1618 if (i < 0) { 1619 printf("%s: BBPCTL busy (pre-write)\n", sc->sc_dev.dv_xname); 1620 return ETIMEDOUT; 1621 } 1622 1623 reg = sc->sc_bbpctl_wr | 1624 LSHIFT(val & 0xff, ATW_BBPCTL_DATA_MASK) | 1625 LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1626 1627 ATW_WRITE(sc, ATW_BBPCTL, reg); 1628 1629 for (i = 1000; --i >= 0; ) { 1630 DELAY(100); 1631 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_WR) == 0) 1632 break; 1633 } 1634 1635 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_WR); 1636 1637 if (i < 0) { 1638 printf("%s: BBPCTL busy (post-write)\n", sc->sc_dev.dv_xname); 1639 return ETIMEDOUT; 1640 } 1641 return 0; 1642 } 1643 1644 /* Read a register on the RF3000 baseband processor using the registers 1645 * the ADM8211 provides for this purpose. 1646 * 1647 * The 7-bit register address is addr. Record the 8-bit data in the register 1648 * in *val. 1649 * 1650 * Return 0 on success. 1651 * 1652 * XXX This does not seem to work. The ADM8211 must require more or 1653 * different magic to read the chip than to write it. Possibly some 1654 * of the magic I have derived from a binary-only driver concerns 1655 * the "chip address" (see the RF3000 manual). 1656 */ 1657 #ifdef ATW_DEBUG 1658 static int 1659 atw_rf3000_read(struct atw_softc *sc, u_int addr, u_int *val) 1660 { 1661 u_int32_t reg; 1662 int i; 1663 1664 for (i = 1000; --i >= 0; ) { 1665 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1666 break; 1667 DELAY(100); 1668 } 1669 1670 if (i < 0) { 1671 printf("%s: start atw_rf3000_read, BBPCTL busy\n", 1672 sc->sc_dev.dv_xname); 1673 return ETIMEDOUT; 1674 } 1675 1676 reg = sc->sc_bbpctl_rd | LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1677 1678 ATW_WRITE(sc, ATW_BBPCTL, reg); 1679 1680 for (i = 1000; --i >= 0; ) { 1681 DELAY(100); 1682 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD) == 0) 1683 break; 1684 } 1685 1686 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_RD); 1687 1688 if (i < 0) { 1689 printf("%s: atw_rf3000_read wrote %08x; BBPCTL still busy\n", 1690 sc->sc_dev.dv_xname, reg); 1691 return ETIMEDOUT; 1692 } 1693 if (val != NULL) 1694 *val = MASK_AND_RSHIFT(reg, ATW_BBPCTL_DATA_MASK); 1695 return 0; 1696 } 1697 #endif /* ATW_DEBUG */ 1698 1699 /* Write a register on the Si4126 RF/IF synthesizer using the registers 1700 * provided by the ADM8211 for that purpose. 1701 * 1702 * val is 18 bits of data, and val is the 4-bit address of the register. 1703 * 1704 * Return 0 on success. 1705 */ 1706 static int 1707 atw_si4126_write(struct atw_softc *sc, u_int addr, u_int val) 1708 { 1709 u_int32_t bits, reg; 1710 int i; 1711 1712 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1713 KASSERT((val & ~PRESHIFT(SI4126_TWI_DATA_MASK)) == 0); 1714 1715 for (i = 1000; --i >= 0; ) { 1716 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1717 break; 1718 DELAY(100); 1719 } 1720 1721 if (i < 0) { 1722 printf("%s: start atw_si4126_write, SYNCTL busy\n", 1723 sc->sc_dev.dv_xname); 1724 return ETIMEDOUT; 1725 } 1726 1727 bits = LSHIFT(val, SI4126_TWI_DATA_MASK) | 1728 LSHIFT(addr, SI4126_TWI_ADDR_MASK); 1729 1730 reg = sc->sc_synctl_wr | LSHIFT(bits, ATW_SYNCTL_DATA_MASK); 1731 1732 ATW_WRITE(sc, ATW_SYNCTL, reg); 1733 1734 for (i = 1000; --i >= 0; ) { 1735 DELAY(100); 1736 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_WR) == 0) 1737 break; 1738 } 1739 1740 /* restore to acceptable starting condition */ 1741 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_WR); 1742 1743 if (i < 0) { 1744 printf("%s: atw_si4126_write wrote %08x, SYNCTL still busy\n", 1745 sc->sc_dev.dv_xname, reg); 1746 return ETIMEDOUT; 1747 } 1748 return 0; 1749 } 1750 1751 /* Read 18-bit data from the 4-bit address addr in Si4126 1752 * RF synthesizer and write the data to *val. Return 0 on success. 1753 * 1754 * XXX This does not seem to work. The ADM8211 must require more or 1755 * different magic to read the chip than to write it. 1756 */ 1757 #ifdef ATW_DEBUG 1758 static int 1759 atw_si4126_read(struct atw_softc *sc, u_int addr, u_int *val) 1760 { 1761 u_int32_t reg; 1762 int i; 1763 1764 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1765 1766 for (i = 1000; --i >= 0; ) { 1767 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1768 break; 1769 DELAY(100); 1770 } 1771 1772 if (i < 0) { 1773 printf("%s: start atw_si4126_read, SYNCTL busy\n", 1774 sc->sc_dev.dv_xname); 1775 return ETIMEDOUT; 1776 } 1777 1778 reg = sc->sc_synctl_rd | LSHIFT(addr, ATW_SYNCTL_DATA_MASK); 1779 1780 ATW_WRITE(sc, ATW_SYNCTL, reg); 1781 1782 for (i = 1000; --i >= 0; ) { 1783 DELAY(100); 1784 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0) 1785 break; 1786 } 1787 1788 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD); 1789 1790 if (i < 0) { 1791 printf("%s: atw_si4126_read wrote %08x, SYNCTL still busy\n", 1792 sc->sc_dev.dv_xname, reg); 1793 return ETIMEDOUT; 1794 } 1795 if (val != NULL) 1796 *val = MASK_AND_RSHIFT(ATW_READ(sc, ATW_SYNCTL), 1797 ATW_SYNCTL_DATA_MASK); 1798 return 0; 1799 } 1800 #endif /* ATW_DEBUG */ 1801 1802 /* XXX is the endianness correct? test. */ 1803 #define atw_calchash(addr) \ 1804 (ether_crc32_le((addr), IEEE80211_ADDR_LEN) & BITS(5, 0)) 1805 1806 /* 1807 * atw_filter_setup: 1808 * 1809 * Set the ADM8211's receive filter. 1810 */ 1811 static void 1812 atw_filter_setup(struct atw_softc *sc) 1813 { 1814 struct ieee80211com *ic = &sc->sc_ic; 1815 struct ethercom *ec = &ic->ic_ec; 1816 struct ifnet *ifp = &sc->sc_ic.ic_if; 1817 int hash; 1818 u_int32_t hashes[2] = { 0, 0 }; 1819 struct ether_multi *enm; 1820 struct ether_multistep step; 1821 1822 DPRINTF(sc, ("%s: atw_filter_setup: sc_flags 0x%08x\n", 1823 sc->sc_dev.dv_xname, sc->sc_flags)); 1824 1825 /* 1826 * If we're running, idle the receive engine. If we're NOT running, 1827 * we're being called from atw_init(), and our writing ATW_NAR will 1828 * start the transmit and receive processes in motion. 1829 */ 1830 if (ifp->if_flags & IFF_RUNNING) 1831 atw_idle(sc, ATW_NAR_SR); 1832 1833 sc->sc_opmode &= ~(ATW_NAR_PR|ATW_NAR_MM); 1834 1835 ifp->if_flags &= ~IFF_ALLMULTI; 1836 1837 if (ifp->if_flags & IFF_PROMISC) { 1838 sc->sc_opmode |= ATW_NAR_PR; 1839 allmulti: 1840 ifp->if_flags |= IFF_ALLMULTI; 1841 goto setit; 1842 } 1843 1844 /* 1845 * Program the 64-bit multicast hash filter. 1846 */ 1847 ETHER_FIRST_MULTI(step, ec, enm); 1848 while (enm != NULL) { 1849 /* XXX */ 1850 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 1851 ETHER_ADDR_LEN) != 0) 1852 goto allmulti; 1853 1854 hash = atw_calchash(enm->enm_addrlo); 1855 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1856 ETHER_NEXT_MULTI(step, enm); 1857 } 1858 1859 if (ifp->if_flags & IFF_BROADCAST) { 1860 hash = atw_calchash(etherbroadcastaddr); 1861 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1862 } 1863 1864 /* all bits set => hash is useless */ 1865 if (~(hashes[0] & hashes[1]) == 0) 1866 goto allmulti; 1867 1868 setit: 1869 if (ifp->if_flags & IFF_ALLMULTI) 1870 sc->sc_opmode |= ATW_NAR_MM; 1871 1872 /* XXX in scan mode, do not filter packets. maybe this is 1873 * unnecessary. 1874 */ 1875 if (ic->ic_state == IEEE80211_S_SCAN) 1876 sc->sc_opmode |= ATW_NAR_PR; 1877 1878 ATW_WRITE(sc, ATW_MAR0, hashes[0]); 1879 ATW_WRITE(sc, ATW_MAR1, hashes[1]); 1880 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1881 DPRINTF(sc, ("%s: ATW_NAR %08x opmode %08x\n", sc->sc_dev.dv_xname, 1882 ATW_READ(sc, ATW_NAR), sc->sc_opmode)); 1883 1884 DPRINTF(sc, ("%s: atw_filter_setup: returning\n", sc->sc_dev.dv_xname)); 1885 } 1886 1887 /* Tell the ADM8211 our preferred BSSID. The ADM8211 must match 1888 * a beacon's BSSID and SSID against the preferred BSSID and SSID 1889 * before it will raise ATW_INTR_LINKON. When the ADM8211 receives 1890 * no beacon with the preferred BSSID and SSID in the number of 1891 * beacon intervals given in ATW_BPLI, then it raises ATW_INTR_LINKOFF. 1892 */ 1893 static void 1894 atw_write_bssid(struct atw_softc *sc) 1895 { 1896 struct ieee80211com *ic = &sc->sc_ic; 1897 u_int8_t *bssid; 1898 1899 bssid = ic->ic_bss->ni_bssid; 1900 1901 ATW_WRITE(sc, ATW_BSSID0, 1902 LSHIFT(bssid[0], ATW_BSSID0_BSSIDB0_MASK) | 1903 LSHIFT(bssid[1], ATW_BSSID0_BSSIDB1_MASK) | 1904 LSHIFT(bssid[2], ATW_BSSID0_BSSIDB2_MASK) | 1905 LSHIFT(bssid[3], ATW_BSSID0_BSSIDB3_MASK)); 1906 1907 ATW_WRITE(sc, ATW_ABDA1, 1908 (ATW_READ(sc, ATW_ABDA1) & 1909 ~(ATW_ABDA1_BSSIDB4_MASK|ATW_ABDA1_BSSIDB5_MASK)) | 1910 LSHIFT(bssid[4], ATW_ABDA1_BSSIDB4_MASK) | 1911 LSHIFT(bssid[5], ATW_ABDA1_BSSIDB5_MASK)); 1912 1913 DPRINTF(sc, ("%s: BSSID %s -> ", sc->sc_dev.dv_xname, 1914 ether_sprintf(sc->sc_bssid))); 1915 DPRINTF(sc, ("%s\n", ether_sprintf(bssid))); 1916 1917 memcpy(sc->sc_bssid, bssid, sizeof(sc->sc_bssid)); 1918 } 1919 1920 /* Write buflen bytes from buf to SRAM starting at the SRAM's ofs'th 1921 * 16-bit word. 1922 */ 1923 static void 1924 atw_write_sram(struct atw_softc *sc, u_int ofs, u_int8_t *buf, u_int buflen) 1925 { 1926 u_int i; 1927 u_int8_t *ptr; 1928 1929 memcpy(&sc->sc_sram[ofs], buf, buflen); 1930 1931 if (ofs % 2 != 0) { 1932 ofs--; 1933 buflen++; 1934 } 1935 1936 if (buflen % 2 != 0) 1937 buflen++; 1938 1939 assert(buflen + ofs <= ATW_SRAM_SIZE); 1940 1941 ptr = &sc->sc_sram[ofs]; 1942 1943 for (i = 0; i < buflen; i += 2) { 1944 ATW_WRITE(sc, ATW_WEPCTL, ATW_WEPCTL_WR | 1945 LSHIFT((ofs + i) / 2, ATW_WEPCTL_TBLADD_MASK)); 1946 DELAY(atw_writewep_delay); 1947 1948 ATW_WRITE(sc, ATW_WESK, 1949 LSHIFT((ptr[i + 1] << 8) | ptr[i], ATW_WESK_DATA_MASK)); 1950 DELAY(atw_writewep_delay); 1951 } 1952 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); /* restore WEP condition */ 1953 1954 if (sc->sc_if.if_flags & IFF_DEBUG) { 1955 int n_octets = 0; 1956 printf("%s: wrote %d bytes at 0x%x wepctl 0x%08x\n", 1957 sc->sc_dev.dv_xname, buflen, ofs, sc->sc_wepctl); 1958 for (i = 0; i < buflen; i++) { 1959 printf(" %02x", ptr[i]); 1960 if (++n_octets % 24 == 0) 1961 printf("\n"); 1962 } 1963 if (n_octets % 24 != 0) 1964 printf("\n"); 1965 } 1966 } 1967 1968 /* Write WEP keys from the ieee80211com to the ADM8211's SRAM. */ 1969 static void 1970 atw_write_wep(struct atw_softc *sc) 1971 { 1972 struct ieee80211com *ic = &sc->sc_ic; 1973 /* SRAM shared-key record format: key0 flags key1 ... key12 */ 1974 u_int8_t buf[IEEE80211_WEP_NKID] 1975 [1 /* key[0] */ + 1 /* flags */ + 12 /* key[1 .. 12] */]; 1976 u_int32_t reg; 1977 int i; 1978 1979 sc->sc_wepctl = 0; 1980 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); 1981 1982 if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) 1983 return; 1984 1985 memset(&buf[0][0], 0, sizeof(buf)); 1986 1987 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 1988 if (ic->ic_nw_keys[i].wk_len > 5) { 1989 buf[i][1] = ATW_WEP_ENABLED | ATW_WEP_104BIT; 1990 } else if (ic->ic_nw_keys[i].wk_len != 0) { 1991 buf[i][1] = ATW_WEP_ENABLED; 1992 } else { 1993 buf[i][1] = 0; 1994 continue; 1995 } 1996 buf[i][0] = ic->ic_nw_keys[i].wk_key[0]; 1997 memcpy(&buf[i][2], &ic->ic_nw_keys[i].wk_key[1], 1998 ic->ic_nw_keys[i].wk_len - 1); 1999 } 2000 2001 reg = ATW_READ(sc, ATW_MACTEST); 2002 reg |= ATW_MACTEST_MMI_USETXCLK | ATW_MACTEST_FORCE_KEYID; 2003 reg &= ~ATW_MACTEST_KEYID_MASK; 2004 reg |= LSHIFT(ic->ic_wep_txkey, ATW_MACTEST_KEYID_MASK); 2005 ATW_WRITE(sc, ATW_MACTEST, reg); 2006 2007 /* RX bypass WEP if revision != 0x20. (I assume revision != 0x20 2008 * throughout.) 2009 */ 2010 sc->sc_wepctl = ATW_WEPCTL_WEPENABLE | ATW_WEPCTL_WEPRXBYP; 2011 if (sc->sc_if.if_flags & IFF_LINK2) 2012 sc->sc_wepctl &= ~ATW_WEPCTL_WEPRXBYP; 2013 2014 atw_write_sram(sc, ATW_SRAM_ADDR_SHARED_KEY, (u_int8_t*)&buf[0][0], 2015 sizeof(buf)); 2016 } 2017 2018 const struct timeval atw_beacon_mininterval = {1, 0}; /* 1s */ 2019 2020 static void 2021 atw_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2022 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2023 { 2024 struct atw_softc *sc = (struct atw_softc*)ic->ic_softc; 2025 2026 switch (subtype) { 2027 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2028 /* do nothing: hardware answers probe request */ 2029 break; 2030 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2031 case IEEE80211_FC0_SUBTYPE_BEACON: 2032 atw_recv_beacon(ic, m, ni, subtype, rssi, rstamp); 2033 break; 2034 default: 2035 (*sc->sc_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 2036 break; 2037 } 2038 return; 2039 } 2040 2041 /* In ad hoc mode, atw_recv_beacon is responsible for the coalescence 2042 * of IBSSs with like SSID/channel but different BSSID. It joins the 2043 * oldest IBSS (i.e., with greatest TSF time), since that is the WECA 2044 * convention. Possibly the ADMtek chip does this for us; I will have 2045 * to test to find out. 2046 * 2047 * XXX we should add the duration field of the received beacon to 2048 * the TSF time it contains before comparing it with the ADM8211's 2049 * TSF. 2050 */ 2051 static void 2052 atw_recv_beacon(struct ieee80211com *ic, struct mbuf *m0, 2053 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2054 { 2055 struct atw_softc *sc; 2056 struct ieee80211_frame *wh; 2057 u_int64_t tsft, bcn_tsft; 2058 u_int32_t tsftl, tsfth; 2059 int do_print = 0; 2060 2061 sc = (struct atw_softc*)ic->ic_if.if_softc; 2062 2063 if (ic->ic_if.if_flags & IFF_LINK0) { 2064 do_print = (ic->ic_if.if_flags & IFF_DEBUG) 2065 ? 1 : ratecheck(&sc->sc_last_beacon, 2066 &atw_beacon_mininterval); 2067 } 2068 2069 wh = mtod(m0, struct ieee80211_frame *); 2070 2071 (*sc->sc_recv_mgmt)(ic, m0, ni, subtype, rssi, rstamp); 2072 2073 if (ic->ic_state != IEEE80211_S_RUN) 2074 return; 2075 2076 if ((ni = ieee80211_lookup_node(ic, wh->i_addr2, 2077 ic->ic_bss->ni_chan)) == NULL) { 2078 if (do_print) 2079 printf("%s: atw_recv_beacon: no node %s\n", 2080 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2081 return; 2082 } 2083 2084 if (ieee80211_match_bss(ic, ni) != 0) 2085 return; 2086 2087 if (memcmp(ni->ni_bssid, ic->ic_bss->ni_bssid, IEEE80211_ADDR_LEN) == 0) 2088 return; 2089 2090 if (do_print) 2091 printf("%s: atw_recv_beacon: bssid mismatch %s\n", 2092 sc->sc_dev.dv_xname, ether_sprintf(ni->ni_bssid)); 2093 2094 if (ic->ic_opmode != IEEE80211_M_IBSS) 2095 return; 2096 2097 /* If we read TSFTL right before rollover, we read a TSF timer 2098 * that is too high rather than too low. This prevents a spurious 2099 * synchronization down the line, however, our IBSS could suffer 2100 * from a creeping TSF.... 2101 */ 2102 tsftl = ATW_READ(sc, ATW_TSFTL); 2103 tsfth = ATW_READ(sc, ATW_TSFTH); 2104 2105 tsft = (u_int64_t)tsfth << 32 | tsftl; 2106 bcn_tsft = le64toh(*(u_int64_t*)ni->ni_tstamp); 2107 2108 if (do_print) 2109 printf("%s: my tsft %" PRIu64 " beacon tsft %" PRIu64 "\n", 2110 sc->sc_dev.dv_xname, tsft, bcn_tsft); 2111 2112 /* we are faster, let the other guy catch up */ 2113 if (bcn_tsft < tsft) 2114 return; 2115 2116 if (do_print) 2117 printf("%s: sync TSF with %s\n", sc->sc_dev.dv_xname, 2118 ether_sprintf(wh->i_addr2)); 2119 2120 ic->ic_flags &= ~IEEE80211_F_SIBSS; 2121 2122 atw_tsf(sc); 2123 2124 /* negotiate rates with new IBSS */ 2125 ieee80211_fix_rate(ic, ni, IEEE80211_F_DOFRATE | 2126 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2127 if (ni->ni_rates.rs_nrates == 0) { 2128 printf("%s: rates mismatch, BSSID %s\n", sc->sc_dev.dv_xname, 2129 ether_sprintf(ni->ni_bssid)); 2130 return; 2131 } 2132 2133 if (do_print) { 2134 printf("%s: sync BSSID %s -> ", sc->sc_dev.dv_xname, 2135 ether_sprintf(ic->ic_bss->ni_bssid)); 2136 printf("%s ", ether_sprintf(ni->ni_bssid)); 2137 printf("(from %s)\n", ether_sprintf(wh->i_addr2)); 2138 } 2139 2140 (*ic->ic_node_copy)(ic, ic->ic_bss, ni); 2141 2142 atw_write_bssid(sc); 2143 atw_start_beacon(sc, 1); 2144 } 2145 2146 /* Write the SSID in the ieee80211com to the SRAM on the ADM8211. 2147 * In ad hoc mode, the SSID is written to the beacons sent by the 2148 * ADM8211. In both ad hoc and infrastructure mode, beacons received 2149 * with matching SSID affect ATW_INTR_LINKON/ATW_INTR_LINKOFF 2150 * indications. 2151 */ 2152 static void 2153 atw_write_ssid(struct atw_softc *sc) 2154 { 2155 struct ieee80211com *ic = &sc->sc_ic; 2156 /* 34 bytes are reserved in ADM8211 SRAM for the SSID, but 2157 * it only expects the element length, not its ID. 2158 */ 2159 u_int8_t buf[roundup(1 /* length */ + IEEE80211_NWID_LEN, 2)]; 2160 2161 memset(buf, 0, sizeof(buf)); 2162 buf[0] = ic->ic_bss->ni_esslen; 2163 memcpy(&buf[1], ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen); 2164 2165 atw_write_sram(sc, ATW_SRAM_ADDR_SSID, buf, 2166 roundup(1 + ic->ic_bss->ni_esslen, 2)); 2167 } 2168 2169 /* Write the supported rates in the ieee80211com to the SRAM of the ADM8211. 2170 * In ad hoc mode, the supported rates are written to beacons sent by the 2171 * ADM8211. 2172 */ 2173 static void 2174 atw_write_sup_rates(struct atw_softc *sc) 2175 { 2176 struct ieee80211com *ic = &sc->sc_ic; 2177 /* 14 bytes are probably (XXX) reserved in the ADM8211 SRAM for 2178 * supported rates 2179 */ 2180 u_int8_t buf[roundup(1 /* length */ + IEEE80211_RATE_SIZE, 2)]; 2181 2182 memset(buf, 0, sizeof(buf)); 2183 2184 buf[0] = ic->ic_bss->ni_rates.rs_nrates; 2185 2186 memcpy(&buf[1], ic->ic_bss->ni_rates.rs_rates, 2187 ic->ic_bss->ni_rates.rs_nrates); 2188 2189 atw_write_sram(sc, ATW_SRAM_ADDR_SUPRATES, buf, sizeof(buf)); 2190 } 2191 2192 /* Start/stop sending beacons. */ 2193 void 2194 atw_start_beacon(struct atw_softc *sc, int start) 2195 { 2196 struct ieee80211com *ic = &sc->sc_ic; 2197 u_int32_t len, capinfo, reg_bcnt, reg_cap1; 2198 2199 if (ATW_IS_ENABLED(sc) == 0) 2200 return; 2201 2202 len = capinfo = 0; 2203 2204 /* start beacons */ 2205 len = sizeof(struct ieee80211_frame) + 2206 8 /* timestamp */ + 2 /* beacon interval */ + 2207 2 /* capability info */ + 2208 2 + ic->ic_bss->ni_esslen /* SSID element */ + 2209 2 + ic->ic_bss->ni_rates.rs_nrates /* rates element */ + 2210 3 /* DS parameters */ + 2211 IEEE80211_CRC_LEN; 2212 2213 reg_bcnt = ATW_READ(sc, ATW_BCNT) & ~ATW_BCNT_BCNT_MASK; 2214 2215 reg_cap1 = ATW_READ(sc, ATW_CAP1) & ~ATW_CAP1_CAPI_MASK; 2216 2217 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2218 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2219 2220 if (!start) 2221 return; 2222 2223 /* TBD use ni_capinfo */ 2224 2225 if (sc->sc_flags & ATWF_SHORT_PREAMBLE) 2226 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2227 if (ic->ic_flags & IEEE80211_F_WEPON) 2228 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2229 2230 switch (ic->ic_opmode) { 2231 case IEEE80211_M_IBSS: 2232 len += 4; /* IBSS parameters */ 2233 capinfo |= IEEE80211_CAPINFO_IBSS; 2234 break; 2235 case IEEE80211_M_HOSTAP: 2236 /* XXX 6-byte minimum TIM */ 2237 len += atw_beacon_len_adjust; 2238 capinfo |= IEEE80211_CAPINFO_ESS; 2239 break; 2240 default: 2241 return; 2242 } 2243 2244 reg_bcnt |= LSHIFT(len, ATW_BCNT_BCNT_MASK); 2245 reg_cap1 |= LSHIFT(capinfo, ATW_CAP1_CAPI_MASK); 2246 2247 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2248 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2249 2250 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_BCNT] = %08x\n", 2251 sc->sc_dev.dv_xname, reg_bcnt)); 2252 2253 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_CAP1] = %08x\n", 2254 sc->sc_dev.dv_xname, reg_cap1)); 2255 } 2256 2257 /* First beacon was sent at time 0 microseconds, current time is 2258 * tsfth << 32 | tsftl microseconds, and beacon interval is tbtt 2259 * microseconds. Return the expected time in microseconds for the 2260 * beacon after next. 2261 */ 2262 static __inline u_int64_t 2263 atw_predict_beacon(u_int64_t tsft, u_int32_t tbtt) 2264 { 2265 return tsft + (tbtt - tsft % tbtt); 2266 } 2267 2268 /* If we've created an IBSS, write the TSF time in the ADM8211 to 2269 * the ieee80211com. 2270 * 2271 * Predict the next target beacon transmission time (TBTT) and 2272 * write it to the ADM8211. 2273 */ 2274 static void 2275 atw_tsf(struct atw_softc *sc) 2276 { 2277 #define TBTTOFS 20 /* TU */ 2278 2279 struct ieee80211com *ic = &sc->sc_ic; 2280 u_int64_t tsft, tbtt; 2281 2282 if ((ic->ic_opmode == IEEE80211_M_HOSTAP) || 2283 ((ic->ic_opmode == IEEE80211_M_IBSS) && 2284 (ic->ic_flags & IEEE80211_F_SIBSS))) { 2285 tsft = ATW_READ(sc, ATW_TSFTH); 2286 tsft <<= 32; 2287 tsft |= ATW_READ(sc, ATW_TSFTL); 2288 *(u_int64_t*)&ic->ic_bss->ni_tstamp[0] = htole64(tsft); 2289 } else 2290 tsft = le64toh(*(u_int64_t*)&ic->ic_bss->ni_tstamp[0]); 2291 2292 tbtt = atw_predict_beacon(tsft, 2293 ic->ic_bss->ni_intval * IEEE80211_DUR_TU); 2294 2295 /* skip one more beacon so that the TBTT cannot pass before 2296 * we've programmed it, and also so that we can subtract a 2297 * few TU so that we wake a little before TBTT. 2298 */ 2299 tbtt += ic->ic_bss->ni_intval * IEEE80211_DUR_TU; 2300 2301 /* wake up a little early */ 2302 tbtt -= TBTTOFS * IEEE80211_DUR_TU; 2303 2304 DPRINTF(sc, ("%s: tsft %" PRIu64 " tbtt %" PRIu64 "\n", 2305 sc->sc_dev.dv_xname, tsft, tbtt)); 2306 2307 ATW_WRITE(sc, ATW_TOFS1, 2308 LSHIFT(1, ATW_TOFS1_TSFTOFSR_MASK) | 2309 LSHIFT(TBTTOFS, ATW_TOFS1_TBTTOFS_MASK) | 2310 LSHIFT( 2311 MASK_AND_RSHIFT((u_int32_t)tbtt, BITS(25, 10)), 2312 ATW_TOFS1_TBTTPRE_MASK)); 2313 #undef TBTTOFS 2314 } 2315 2316 static void 2317 atw_next_scan(void *arg) 2318 { 2319 struct atw_softc *sc = arg; 2320 struct ieee80211com *ic = &sc->sc_ic; 2321 struct ifnet *ifp = &ic->ic_if; 2322 int s; 2323 2324 /* don't call atw_start w/o network interrupts blocked */ 2325 s = splnet(); 2326 if (ic->ic_state == IEEE80211_S_SCAN) 2327 ieee80211_next_scan(ifp); 2328 splx(s); 2329 } 2330 2331 /* Synchronize the hardware state with the software state. */ 2332 static int 2333 atw_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 2334 { 2335 struct ifnet *ifp = &ic->ic_if; 2336 struct atw_softc *sc = ifp->if_softc; 2337 enum ieee80211_state ostate; 2338 int error; 2339 2340 ostate = ic->ic_state; 2341 2342 if (nstate == IEEE80211_S_INIT) { 2343 callout_stop(&sc->sc_scan_ch); 2344 sc->sc_cur_chan = IEEE80211_CHAN_ANY; 2345 atw_start_beacon(sc, 0); 2346 return (*sc->sc_newstate)(ic, nstate, arg); 2347 } 2348 2349 if ((error = atw_tune(sc)) != 0) 2350 return error; 2351 2352 switch (nstate) { 2353 case IEEE80211_S_ASSOC: 2354 break; 2355 case IEEE80211_S_INIT: 2356 panic("%s: unexpected state IEEE80211_S_INIT\n", __func__); 2357 break; 2358 case IEEE80211_S_SCAN: 2359 callout_reset(&sc->sc_scan_ch, atw_dwelltime * hz / 1000, 2360 atw_next_scan, sc); 2361 2362 break; 2363 case IEEE80211_S_RUN: 2364 if (ic->ic_opmode == IEEE80211_M_STA) 2365 break; 2366 /*FALLTHROUGH*/ 2367 case IEEE80211_S_AUTH: 2368 atw_write_bssid(sc); 2369 atw_write_ssid(sc); 2370 atw_write_sup_rates(sc); 2371 2372 if (ic->ic_opmode == IEEE80211_M_AHDEMO || 2373 ic->ic_opmode == IEEE80211_M_MONITOR) 2374 break; 2375 2376 /* set listen interval 2377 * XXX do software units agree w/ hardware? 2378 */ 2379 ATW_WRITE(sc, ATW_BPLI, 2380 LSHIFT(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2381 LSHIFT(ic->ic_lintval / ic->ic_bss->ni_intval, 2382 ATW_BPLI_LI_MASK)); 2383 2384 DPRINTF(sc, ("%s: reg[ATW_BPLI] = %08x\n", 2385 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_BPLI))); 2386 2387 atw_tsf(sc); 2388 break; 2389 } 2390 2391 if (nstate != IEEE80211_S_SCAN) 2392 callout_stop(&sc->sc_scan_ch); 2393 2394 if (nstate == IEEE80211_S_RUN && 2395 (ic->ic_opmode == IEEE80211_M_HOSTAP || 2396 ic->ic_opmode == IEEE80211_M_IBSS)) 2397 atw_start_beacon(sc, 1); 2398 else 2399 atw_start_beacon(sc, 0); 2400 2401 error = (*sc->sc_newstate)(ic, nstate, arg); 2402 2403 if (ostate == IEEE80211_S_INIT && nstate == IEEE80211_S_SCAN) 2404 atw_write_bssid(sc); 2405 2406 return error; 2407 } 2408 2409 /* 2410 * atw_add_rxbuf: 2411 * 2412 * Add a receive buffer to the indicated descriptor. 2413 */ 2414 int 2415 atw_add_rxbuf(struct atw_softc *sc, int idx) 2416 { 2417 struct atw_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2418 struct mbuf *m; 2419 int error; 2420 2421 MGETHDR(m, M_DONTWAIT, MT_DATA); 2422 if (m == NULL) 2423 return (ENOBUFS); 2424 2425 MCLGET(m, M_DONTWAIT); 2426 if ((m->m_flags & M_EXT) == 0) { 2427 m_freem(m); 2428 return (ENOBUFS); 2429 } 2430 2431 if (rxs->rxs_mbuf != NULL) 2432 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2433 2434 rxs->rxs_mbuf = m; 2435 2436 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 2437 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 2438 BUS_DMA_READ|BUS_DMA_NOWAIT); 2439 if (error) { 2440 printf("%s: can't load rx DMA map %d, error = %d\n", 2441 sc->sc_dev.dv_xname, idx, error); 2442 panic("atw_add_rxbuf"); /* XXX */ 2443 } 2444 2445 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2446 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2447 2448 ATW_INIT_RXDESC(sc, idx); 2449 2450 return (0); 2451 } 2452 2453 /* 2454 * Release any queued transmit buffers. 2455 */ 2456 void 2457 atw_txdrain(struct atw_softc *sc) 2458 { 2459 struct atw_txsoft *txs; 2460 2461 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 2462 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 2463 if (txs->txs_mbuf != NULL) { 2464 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2465 m_freem(txs->txs_mbuf); 2466 txs->txs_mbuf = NULL; 2467 } 2468 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 2469 } 2470 sc->sc_tx_timer = 0; 2471 } 2472 2473 /* 2474 * atw_stop: [ ifnet interface function ] 2475 * 2476 * Stop transmission on the interface. 2477 */ 2478 void 2479 atw_stop(struct ifnet *ifp, int disable) 2480 { 2481 struct atw_softc *sc = ifp->if_softc; 2482 struct ieee80211com *ic = &sc->sc_ic; 2483 2484 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2485 2486 /* Disable interrupts. */ 2487 ATW_WRITE(sc, ATW_IER, 0); 2488 2489 /* Stop the transmit and receive processes. */ 2490 sc->sc_opmode = 0; 2491 ATW_WRITE(sc, ATW_NAR, 0); 2492 DELAY(20 * 1000); 2493 ATW_WRITE(sc, ATW_TDBD, 0); 2494 ATW_WRITE(sc, ATW_TDBP, 0); 2495 ATW_WRITE(sc, ATW_RDB, 0); 2496 2497 atw_txdrain(sc); 2498 2499 if (disable) { 2500 atw_rxdrain(sc); 2501 atw_disable(sc); 2502 } 2503 2504 /* 2505 * Mark the interface down and cancel the watchdog timer. 2506 */ 2507 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2508 ifp->if_timer = 0; 2509 2510 if (!disable) 2511 atw_reset(sc); 2512 } 2513 2514 /* 2515 * atw_rxdrain: 2516 * 2517 * Drain the receive queue. 2518 */ 2519 void 2520 atw_rxdrain(struct atw_softc *sc) 2521 { 2522 struct atw_rxsoft *rxs; 2523 int i; 2524 2525 for (i = 0; i < ATW_NRXDESC; i++) { 2526 rxs = &sc->sc_rxsoft[i]; 2527 if (rxs->rxs_mbuf == NULL) 2528 continue; 2529 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2530 m_freem(rxs->rxs_mbuf); 2531 rxs->rxs_mbuf = NULL; 2532 } 2533 } 2534 2535 /* 2536 * atw_detach: 2537 * 2538 * Detach an ADM8211 interface. 2539 */ 2540 int 2541 atw_detach(struct atw_softc *sc) 2542 { 2543 struct ifnet *ifp = &sc->sc_ic.ic_if; 2544 struct atw_rxsoft *rxs; 2545 struct atw_txsoft *txs; 2546 int i; 2547 2548 /* 2549 * Succeed now if there isn't any work to do. 2550 */ 2551 if ((sc->sc_flags & ATWF_ATTACHED) == 0) 2552 return (0); 2553 2554 ieee80211_ifdetach(ifp); 2555 if_detach(ifp); 2556 2557 for (i = 0; i < ATW_NRXDESC; i++) { 2558 rxs = &sc->sc_rxsoft[i]; 2559 if (rxs->rxs_mbuf != NULL) { 2560 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2561 m_freem(rxs->rxs_mbuf); 2562 rxs->rxs_mbuf = NULL; 2563 } 2564 bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap); 2565 } 2566 for (i = 0; i < ATW_TXQUEUELEN; i++) { 2567 txs = &sc->sc_txsoft[i]; 2568 if (txs->txs_mbuf != NULL) { 2569 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2570 m_freem(txs->txs_mbuf); 2571 txs->txs_mbuf = NULL; 2572 } 2573 bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap); 2574 } 2575 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 2576 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 2577 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 2578 sizeof(struct atw_control_data)); 2579 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 2580 2581 shutdownhook_disestablish(sc->sc_sdhook); 2582 powerhook_disestablish(sc->sc_powerhook); 2583 2584 if (sc->sc_srom) 2585 free(sc->sc_srom, M_DEVBUF); 2586 2587 return (0); 2588 } 2589 2590 /* atw_shutdown: make sure the interface is stopped at reboot time. */ 2591 void 2592 atw_shutdown(void *arg) 2593 { 2594 struct atw_softc *sc = arg; 2595 2596 atw_stop(&sc->sc_ic.ic_if, 1); 2597 } 2598 2599 int 2600 atw_intr(void *arg) 2601 { 2602 struct atw_softc *sc = arg; 2603 struct ifnet *ifp = &sc->sc_ic.ic_if; 2604 u_int32_t status, rxstatus, txstatus, linkstatus; 2605 int handled = 0, txthresh; 2606 2607 #ifdef DEBUG 2608 if (ATW_IS_ENABLED(sc) == 0) 2609 panic("%s: atw_intr: not enabled", sc->sc_dev.dv_xname); 2610 #endif 2611 2612 /* 2613 * If the interface isn't running, the interrupt couldn't 2614 * possibly have come from us. 2615 */ 2616 if ((ifp->if_flags & IFF_RUNNING) == 0 || 2617 (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 2618 return (0); 2619 2620 for (;;) { 2621 status = ATW_READ(sc, ATW_STSR); 2622 2623 if (status) 2624 ATW_WRITE(sc, ATW_STSR, status); 2625 2626 #ifdef ATW_DEBUG 2627 #define PRINTINTR(flag) do { \ 2628 if ((status & flag) != 0) { \ 2629 printf("%s" #flag, delim); \ 2630 delim = ","; \ 2631 } \ 2632 } while (0) 2633 2634 if (atw_debug > 1 && status) { 2635 const char *delim = "<"; 2636 2637 printf("%s: reg[STSR] = %x", 2638 sc->sc_dev.dv_xname, status); 2639 2640 PRINTINTR(ATW_INTR_FBE); 2641 PRINTINTR(ATW_INTR_LINKOFF); 2642 PRINTINTR(ATW_INTR_LINKON); 2643 PRINTINTR(ATW_INTR_RCI); 2644 PRINTINTR(ATW_INTR_RDU); 2645 PRINTINTR(ATW_INTR_REIS); 2646 PRINTINTR(ATW_INTR_RPS); 2647 PRINTINTR(ATW_INTR_TCI); 2648 PRINTINTR(ATW_INTR_TDU); 2649 PRINTINTR(ATW_INTR_TLT); 2650 PRINTINTR(ATW_INTR_TPS); 2651 PRINTINTR(ATW_INTR_TRT); 2652 PRINTINTR(ATW_INTR_TUF); 2653 PRINTINTR(ATW_INTR_BCNTC); 2654 PRINTINTR(ATW_INTR_ATIME); 2655 PRINTINTR(ATW_INTR_TBTT); 2656 PRINTINTR(ATW_INTR_TSCZ); 2657 PRINTINTR(ATW_INTR_TSFTF); 2658 printf(">\n"); 2659 } 2660 #undef PRINTINTR 2661 #endif /* ATW_DEBUG */ 2662 2663 if ((status & sc->sc_inten) == 0) 2664 break; 2665 2666 handled = 1; 2667 2668 rxstatus = status & sc->sc_rxint_mask; 2669 txstatus = status & sc->sc_txint_mask; 2670 linkstatus = status & sc->sc_linkint_mask; 2671 2672 if (linkstatus) { 2673 atw_linkintr(sc, linkstatus); 2674 } 2675 2676 if (rxstatus) { 2677 /* Grab any new packets. */ 2678 atw_rxintr(sc); 2679 2680 if (rxstatus & ATW_INTR_RDU) { 2681 printf("%s: receive ring overrun\n", 2682 sc->sc_dev.dv_xname); 2683 /* Get the receive process going again. */ 2684 ATW_WRITE(sc, ATW_RDR, 0x1); 2685 break; 2686 } 2687 } 2688 2689 if (txstatus) { 2690 /* Sweep up transmit descriptors. */ 2691 atw_txintr(sc); 2692 2693 if (txstatus & ATW_INTR_TLT) 2694 DPRINTF(sc, ("%s: tx lifetime exceeded\n", 2695 sc->sc_dev.dv_xname)); 2696 2697 if (txstatus & ATW_INTR_TRT) 2698 DPRINTF(sc, ("%s: tx retry limit exceeded\n", 2699 sc->sc_dev.dv_xname)); 2700 2701 /* If Tx under-run, increase our transmit threshold 2702 * if another is available. 2703 */ 2704 txthresh = sc->sc_txthresh + 1; 2705 if ((txstatus & ATW_INTR_TUF) && 2706 sc->sc_txth[txthresh].txth_name != NULL) { 2707 /* Idle the transmit process. */ 2708 atw_idle(sc, ATW_NAR_ST); 2709 2710 sc->sc_txthresh = txthresh; 2711 sc->sc_opmode &= ~(ATW_NAR_TR_MASK|ATW_NAR_SF); 2712 sc->sc_opmode |= 2713 sc->sc_txth[txthresh].txth_opmode; 2714 printf("%s: transmit underrun; new " 2715 "threshold: %s\n", sc->sc_dev.dv_xname, 2716 sc->sc_txth[txthresh].txth_name); 2717 2718 /* Set the new threshold and restart 2719 * the transmit process. 2720 */ 2721 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2722 DELAY(20 * 1000); 2723 ATW_WRITE(sc, ATW_RDR, 0x1); 2724 /* XXX Log every Nth underrun from 2725 * XXX now on? 2726 */ 2727 } 2728 } 2729 2730 if (status & (ATW_INTR_TPS|ATW_INTR_RPS)) { 2731 if (status & ATW_INTR_TPS) 2732 printf("%s: transmit process stopped\n", 2733 sc->sc_dev.dv_xname); 2734 if (status & ATW_INTR_RPS) 2735 printf("%s: receive process stopped\n", 2736 sc->sc_dev.dv_xname); 2737 (void)atw_init(ifp); 2738 break; 2739 } 2740 2741 if (status & ATW_INTR_FBE) { 2742 printf("%s: fatal bus error\n", sc->sc_dev.dv_xname); 2743 (void)atw_init(ifp); 2744 break; 2745 } 2746 2747 /* 2748 * Not handled: 2749 * 2750 * Transmit buffer unavailable -- normal 2751 * condition, nothing to do, really. 2752 * 2753 * Early receive interrupt -- not available on 2754 * all chips, we just use RI. We also only 2755 * use single-segment receive DMA, so this 2756 * is mostly useless. 2757 * 2758 * TBD others 2759 */ 2760 } 2761 2762 /* Try to get more packets going. */ 2763 atw_start(ifp); 2764 2765 return (handled); 2766 } 2767 2768 /* 2769 * atw_idle: 2770 * 2771 * Cause the transmit and/or receive processes to go idle. 2772 * 2773 * XXX It seems that the ADM8211 will not signal the end of the Rx/Tx 2774 * process in STSR if I clear SR or ST after the process has already 2775 * ceased. Fair enough. But the Rx process status bits in ATW_TEST0 2776 * do not seem to be too reliable. Perhaps I have the sense of the 2777 * Rx bits switched with the Tx bits? 2778 */ 2779 void 2780 atw_idle(struct atw_softc *sc, u_int32_t bits) 2781 { 2782 u_int32_t ackmask = 0, opmode, stsr, test0; 2783 int i, s; 2784 2785 s = splnet(); 2786 2787 opmode = sc->sc_opmode & ~bits; 2788 2789 if (bits & ATW_NAR_SR) 2790 ackmask |= ATW_INTR_RPS; 2791 2792 if (bits & ATW_NAR_ST) { 2793 ackmask |= ATW_INTR_TPS; 2794 /* set ATW_NAR_HF to flush TX FIFO. */ 2795 opmode |= ATW_NAR_HF; 2796 } 2797 2798 ATW_WRITE(sc, ATW_NAR, opmode); 2799 DELAY(20 * 1000); 2800 2801 for (i = 0; i < 10; i++) { 2802 stsr = ATW_READ(sc, ATW_STSR); 2803 if ((stsr & ackmask) == ackmask) 2804 break; 2805 DELAY(1000); 2806 } 2807 2808 ATW_WRITE(sc, ATW_STSR, stsr & ackmask); 2809 2810 if ((stsr & ackmask) == ackmask) 2811 goto out; 2812 2813 test0 = ATW_READ(sc, ATW_TEST0); 2814 2815 if ((bits & ATW_NAR_ST) != 0 && (stsr & ATW_INTR_TPS) == 0 && 2816 (test0 & ATW_TEST0_TS_MASK) != ATW_TEST0_TS_STOPPED) { 2817 printf("%s: transmit process not idle [%s]\n", 2818 sc->sc_dev.dv_xname, 2819 atw_tx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_TS_MASK)]); 2820 printf("%s: bits %08x test0 %08x stsr %08x\n", 2821 sc->sc_dev.dv_xname, bits, test0, stsr); 2822 } 2823 2824 if ((bits & ATW_NAR_SR) != 0 && (stsr & ATW_INTR_RPS) == 0 && 2825 (test0 & ATW_TEST0_RS_MASK) != ATW_TEST0_RS_STOPPED) { 2826 DPRINTF2(sc, ("%s: receive process not idle [%s]\n", 2827 sc->sc_dev.dv_xname, 2828 atw_rx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_RS_MASK)])); 2829 DPRINTF2(sc, ("%s: bits %08x test0 %08x stsr %08x\n", 2830 sc->sc_dev.dv_xname, bits, test0, stsr)); 2831 } 2832 out: 2833 if ((bits & ATW_NAR_ST) != 0) 2834 atw_txdrain(sc); 2835 splx(s); 2836 return; 2837 } 2838 2839 /* 2840 * atw_linkintr: 2841 * 2842 * Helper; handle link-status interrupts. 2843 */ 2844 void 2845 atw_linkintr(struct atw_softc *sc, u_int32_t linkstatus) 2846 { 2847 struct ieee80211com *ic = &sc->sc_ic; 2848 2849 if (ic->ic_state != IEEE80211_S_RUN) 2850 return; 2851 2852 if (linkstatus & ATW_INTR_LINKON) { 2853 DPRINTF(sc, ("%s: link on\n", sc->sc_dev.dv_xname)); 2854 sc->sc_rescan_timer = 0; 2855 } else if (linkstatus & ATW_INTR_LINKOFF) { 2856 DPRINTF(sc, ("%s: link off\n", sc->sc_dev.dv_xname)); 2857 if (ic->ic_opmode != IEEE80211_M_STA) 2858 return; 2859 sc->sc_rescan_timer = 3; 2860 ic->ic_if.if_timer = 1; 2861 } 2862 } 2863 2864 /* 2865 * atw_rxintr: 2866 * 2867 * Helper; handle receive interrupts. 2868 */ 2869 void 2870 atw_rxintr(struct atw_softc *sc) 2871 { 2872 static int rate_tbl[] = {2, 4, 11, 22, 44}; 2873 struct ieee80211com *ic = &sc->sc_ic; 2874 struct ieee80211_node *ni; 2875 struct ieee80211_frame *wh; 2876 struct ifnet *ifp = &ic->ic_if; 2877 struct atw_rxsoft *rxs; 2878 struct mbuf *m; 2879 u_int32_t rxstat; 2880 int i, len, rate, rate0; 2881 u_int32_t rssi; 2882 2883 for (i = sc->sc_rxptr;; i = ATW_NEXTRX(i)) { 2884 rxs = &sc->sc_rxsoft[i]; 2885 2886 ATW_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 2887 2888 rxstat = le32toh(sc->sc_rxdescs[i].ar_stat); 2889 rssi = le32toh(sc->sc_rxdescs[i].ar_rssi); 2890 rate0 = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_RXDR_MASK); 2891 2892 if (rxstat & ATW_RXSTAT_OWN) 2893 break; /* We have processed all receive buffers. */ 2894 2895 DPRINTF3(sc, 2896 ("%s: rx stat %08x rssi %08x buf1 %08x buf2 %08x\n", 2897 sc->sc_dev.dv_xname, 2898 le32toh(sc->sc_rxdescs[i].ar_stat), 2899 le32toh(sc->sc_rxdescs[i].ar_rssi), 2900 le32toh(sc->sc_rxdescs[i].ar_buf1), 2901 le32toh(sc->sc_rxdescs[i].ar_buf2))); 2902 2903 /* 2904 * Make sure the packet fits in one buffer. This should 2905 * always be the case. 2906 */ 2907 if ((rxstat & (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) != 2908 (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) { 2909 printf("%s: incoming packet spilled, resetting\n", 2910 sc->sc_dev.dv_xname); 2911 (void)atw_init(ifp); 2912 return; 2913 } 2914 2915 /* 2916 * If an error occurred, update stats, clear the status 2917 * word, and leave the packet buffer in place. It will 2918 * simply be reused the next time the ring comes around. 2919 * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long 2920 * error. 2921 */ 2922 2923 if ((rxstat & ATW_RXSTAT_ES) != 0 && 2924 ((sc->sc_ic.ic_ec.ec_capenable & ETHERCAP_VLAN_MTU) == 0 || 2925 (rxstat & (ATW_RXSTAT_DE | ATW_RXSTAT_SFDE | 2926 ATW_RXSTAT_SIGE | ATW_RXSTAT_CRC16E | 2927 ATW_RXSTAT_RXTOE | ATW_RXSTAT_CRC32E | 2928 ATW_RXSTAT_ICVE)) != 0)) { 2929 #define PRINTERR(bit, str) \ 2930 if (rxstat & (bit)) \ 2931 printf("%s: receive error: %s\n", \ 2932 sc->sc_dev.dv_xname, str) 2933 ifp->if_ierrors++; 2934 PRINTERR(ATW_RXSTAT_DE, "descriptor error"); 2935 PRINTERR(ATW_RXSTAT_SFDE, "PLCP SFD error"); 2936 PRINTERR(ATW_RXSTAT_SIGE, "PLCP signal error"); 2937 PRINTERR(ATW_RXSTAT_CRC16E, "PLCP CRC16 error"); 2938 PRINTERR(ATW_RXSTAT_RXTOE, "time-out"); 2939 PRINTERR(ATW_RXSTAT_CRC32E, "FCS error"); 2940 PRINTERR(ATW_RXSTAT_ICVE, "WEP ICV error"); 2941 #undef PRINTERR 2942 ATW_INIT_RXDESC(sc, i); 2943 continue; 2944 } 2945 2946 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2947 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 2948 2949 /* 2950 * No errors; receive the packet. Note the ADM8211 2951 * includes the CRC in promiscuous mode. 2952 */ 2953 len = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_FL_MASK); 2954 2955 /* 2956 * Allocate a new mbuf cluster. If that fails, we are 2957 * out of memory, and must drop the packet and recycle 2958 * the buffer that's already attached to this descriptor. 2959 */ 2960 m = rxs->rxs_mbuf; 2961 if (atw_add_rxbuf(sc, i) != 0) { 2962 ifp->if_ierrors++; 2963 ATW_INIT_RXDESC(sc, i); 2964 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2965 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2966 continue; 2967 } 2968 2969 ifp->if_ipackets++; 2970 if (sc->sc_opmode & ATW_NAR_PR) 2971 m->m_flags |= M_HASFCS; 2972 m->m_pkthdr.rcvif = ifp; 2973 m->m_pkthdr.len = m->m_len = MIN(m->m_ext.ext_size, len); 2974 2975 if (rate0 >= sizeof(rate_tbl) / sizeof(rate_tbl[0])) 2976 rate = 0; 2977 else 2978 rate = rate_tbl[rate0]; 2979 2980 #if NBPFILTER > 0 2981 /* Pass this up to any BPF listeners. */ 2982 if (sc->sc_radiobpf != NULL) { 2983 struct atw_rx_radiotap_header *tap = &sc->sc_rxtap; 2984 2985 tap->ar_rate = rate; 2986 tap->ar_chan_freq = ic->ic_bss->ni_chan->ic_freq; 2987 tap->ar_chan_flags = ic->ic_bss->ni_chan->ic_flags; 2988 2989 /* TBD verify units are dB */ 2990 tap->ar_antsignal = (int)rssi; 2991 /* TBD tap->ar_flags */ 2992 2993 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 2994 tap->ar_ihdr.it_len, m); 2995 } 2996 #endif /* NPBFILTER > 0 */ 2997 2998 wh = mtod(m, struct ieee80211_frame *); 2999 ni = ieee80211_find_rxnode(ic, wh); 3000 ieee80211_input(ifp, m, ni, (int)rssi, 0); 3001 /* 3002 * The frame may have caused the node to be marked for 3003 * reclamation (e.g. in response to a DEAUTH message) 3004 * so use free_node here instead of unref_node. 3005 */ 3006 if (ni == ic->ic_bss) 3007 ieee80211_unref_node(&ni); 3008 else 3009 ieee80211_free_node(ic, ni); 3010 } 3011 3012 /* Update the receive pointer. */ 3013 sc->sc_rxptr = i; 3014 } 3015 3016 /* 3017 * atw_txintr: 3018 * 3019 * Helper; handle transmit interrupts. 3020 */ 3021 void 3022 atw_txintr(struct atw_softc *sc) 3023 { 3024 #define TXSTAT_ERRMASK (ATW_TXSTAT_TUF | ATW_TXSTAT_TLT | ATW_TXSTAT_TRT | \ 3025 ATW_TXSTAT_TRO | ATW_TXSTAT_SOFBR) 3026 #define TXSTAT_FMT "\20\31ATW_TXSTAT_SOFBR\32ATW_TXSTAT_TRO\33ATW_TXSTAT_TUF" \ 3027 "\34ATW_TXSTAT_TRT\35ATW_TXSTAT_TLT" 3028 3029 static char txstat_buf[sizeof("ffffffff<>" TXSTAT_FMT)]; 3030 struct ifnet *ifp = &sc->sc_ic.ic_if; 3031 struct atw_txsoft *txs; 3032 u_int32_t txstat; 3033 3034 DPRINTF3(sc, ("%s: atw_txintr: sc_flags 0x%08x\n", 3035 sc->sc_dev.dv_xname, sc->sc_flags)); 3036 3037 ifp->if_flags &= ~IFF_OACTIVE; 3038 3039 /* 3040 * Go through our Tx list and free mbufs for those 3041 * frames that have been transmitted. 3042 */ 3043 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 3044 ATW_CDTXSYNC(sc, txs->txs_lastdesc, 1, 3045 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3046 3047 #ifdef ATW_DEBUG 3048 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3049 int i; 3050 printf(" txsoft %p transmit chain:\n", txs); 3051 ATW_CDTXSYNC(sc, txs->txs_firstdesc, 3052 txs->txs_ndescs - 1, 3053 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3054 for (i = txs->txs_firstdesc;; i = ATW_NEXTTX(i)) { 3055 printf(" descriptor %d:\n", i); 3056 printf(" at_status: 0x%08x\n", 3057 le32toh(sc->sc_txdescs[i].at_stat)); 3058 printf(" at_flags: 0x%08x\n", 3059 le32toh(sc->sc_txdescs[i].at_flags)); 3060 printf(" at_buf1: 0x%08x\n", 3061 le32toh(sc->sc_txdescs[i].at_buf1)); 3062 printf(" at_buf2: 0x%08x\n", 3063 le32toh(sc->sc_txdescs[i].at_buf2)); 3064 if (i == txs->txs_lastdesc) 3065 break; 3066 } 3067 } 3068 #endif 3069 3070 txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].at_stat); 3071 if (txstat & ATW_TXSTAT_OWN) 3072 break; 3073 3074 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 3075 3076 sc->sc_txfree += txs->txs_ndescs; 3077 3078 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 3079 0, txs->txs_dmamap->dm_mapsize, 3080 BUS_DMASYNC_POSTWRITE); 3081 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 3082 m_freem(txs->txs_mbuf); 3083 txs->txs_mbuf = NULL; 3084 3085 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 3086 3087 if ((ifp->if_flags & IFF_DEBUG) != 0 && 3088 (txstat & TXSTAT_ERRMASK) != 0) { 3089 bitmask_snprintf(txstat & TXSTAT_ERRMASK, TXSTAT_FMT, 3090 txstat_buf, sizeof(txstat_buf)); 3091 printf("%s: txstat %s %d\n", sc->sc_dev.dv_xname, 3092 txstat_buf, 3093 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK)); 3094 } 3095 3096 /* 3097 * Check for errors and collisions. 3098 */ 3099 if (txstat & ATW_TXSTAT_TUF) 3100 sc->sc_stats.ts_tx_tuf++; 3101 if (txstat & ATW_TXSTAT_TLT) 3102 sc->sc_stats.ts_tx_tlt++; 3103 if (txstat & ATW_TXSTAT_TRT) 3104 sc->sc_stats.ts_tx_trt++; 3105 if (txstat & ATW_TXSTAT_TRO) 3106 sc->sc_stats.ts_tx_tro++; 3107 if (txstat & ATW_TXSTAT_SOFBR) { 3108 sc->sc_stats.ts_tx_sofbr++; 3109 } 3110 3111 if ((txstat & ATW_TXSTAT_ES) == 0) 3112 ifp->if_collisions += 3113 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK); 3114 else 3115 ifp->if_oerrors++; 3116 3117 ifp->if_opackets++; 3118 } 3119 3120 /* 3121 * If there are no more pending transmissions, cancel the watchdog 3122 * timer. 3123 */ 3124 if (txs == NULL) 3125 sc->sc_tx_timer = 0; 3126 #undef TXSTAT_ERRMASK 3127 #undef TXSTAT_FMT 3128 } 3129 3130 /* 3131 * atw_watchdog: [ifnet interface function] 3132 * 3133 * Watchdog timer handler. 3134 */ 3135 void 3136 atw_watchdog(struct ifnet *ifp) 3137 { 3138 struct atw_softc *sc = ifp->if_softc; 3139 struct ieee80211com *ic = &sc->sc_ic; 3140 3141 ifp->if_timer = 0; 3142 if (ATW_IS_ENABLED(sc) == 0) 3143 return; 3144 3145 if (sc->sc_rescan_timer) { 3146 if (--sc->sc_rescan_timer == 0) 3147 (void)ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3148 } 3149 if (sc->sc_tx_timer) { 3150 if (--sc->sc_tx_timer == 0 && 3151 !SIMPLEQ_EMPTY(&sc->sc_txdirtyq)) { 3152 printf("%s: transmit timeout\n", ifp->if_xname); 3153 ifp->if_oerrors++; 3154 (void)atw_init(ifp); 3155 atw_start(ifp); 3156 } 3157 } 3158 if (sc->sc_tx_timer != 0 || sc->sc_rescan_timer != 0) 3159 ifp->if_timer = 1; 3160 ieee80211_watchdog(ifp); 3161 } 3162 3163 /* Compute the 802.11 Duration field and the PLCP Length fields for 3164 * a len-byte frame (HEADER + PAYLOAD + FCS) sent at rate * 500Kbps. 3165 * Write the fields to the ADM8211 Tx header, frm. 3166 * 3167 * TBD use the fragmentation threshold to find the right duration for 3168 * the first & last fragments. 3169 * 3170 * TBD make certain of the duration fields applied by the ADM8211 to each 3171 * fragment. I think that the ADM8211 knows how to subtract the CTS 3172 * duration when ATW_HDRCTL_RTSCTS is clear; that is why I add it regardless. 3173 * I also think that the ADM8211 does *some* arithmetic for us, because 3174 * otherwise I think we would have to set a first duration for CTS/first 3175 * fragment, a second duration for fragments between the first and the 3176 * last, and a third duration for the last fragment. 3177 * 3178 * TBD make certain that duration fields reflect addition of FCS/WEP 3179 * and correct duration arithmetic as necessary. 3180 */ 3181 static void 3182 atw_frame_setdurs(struct atw_softc *sc, struct atw_frame *frm, int rate, 3183 int len) 3184 { 3185 int remainder; 3186 3187 /* deal also with encrypted fragments */ 3188 if (frm->atw_hdrctl & htole16(ATW_HDRCTL_WEP)) { 3189 DPRINTF2(sc, ("%s: atw_frame_setdurs len += 8\n", 3190 sc->sc_dev.dv_xname)); 3191 len += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + 3192 IEEE80211_WEP_CRCLEN; 3193 } 3194 3195 /* 802.11 Duration Field for CTS/Data/ACK sequence minus FCS & WEP 3196 * duration (XXX added by MAC?). 3197 */ 3198 frm->atw_head_dur = (16 * (len - IEEE80211_CRC_LEN)) / rate; 3199 remainder = (16 * (len - IEEE80211_CRC_LEN)) % rate; 3200 3201 if (rate <= 4) 3202 /* 1-2Mbps WLAN: send ACK/CTS at 1Mbps */ 3203 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3204 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3205 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3206 IEEE80211_DUR_DS_SLOW_CTS + IEEE80211_DUR_DS_SLOW_ACK; 3207 else 3208 /* 5-11Mbps WLAN: send ACK/CTS at 2Mbps */ 3209 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3210 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3211 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3212 IEEE80211_DUR_DS_FAST_CTS + IEEE80211_DUR_DS_FAST_ACK; 3213 3214 /* lengthen duration if long preamble */ 3215 if ((sc->sc_flags & ATWF_SHORT_PREAMBLE) == 0) 3216 frm->atw_head_dur += 3217 3 * (IEEE80211_DUR_DS_LONG_PREAMBLE - 3218 IEEE80211_DUR_DS_SHORT_PREAMBLE) + 3219 3 * (IEEE80211_DUR_DS_SLOW_PLCPHDR - 3220 IEEE80211_DUR_DS_FAST_PLCPHDR); 3221 3222 if (remainder != 0) 3223 frm->atw_head_dur++; 3224 3225 if ((atw_voodoo & VOODOO_DUR_2_4_SPECIALCASE) && 3226 (rate == 2 || rate == 4)) { 3227 /* derived from Linux: how could this be right? */ 3228 frm->atw_head_plcplen = frm->atw_head_dur; 3229 } else { 3230 frm->atw_head_plcplen = (16 * len) / rate; 3231 remainder = (80 * len) % (rate * 5); 3232 3233 if (remainder != 0) { 3234 frm->atw_head_plcplen++; 3235 3236 /* XXX magic */ 3237 if ((atw_voodoo & VOODOO_DUR_11_ROUNDING) && 3238 rate == 22 && remainder <= 30) 3239 frm->atw_head_plcplen |= 0x8000; 3240 } 3241 } 3242 frm->atw_tail_plcplen = frm->atw_head_plcplen = 3243 htole16(frm->atw_head_plcplen); 3244 frm->atw_tail_dur = frm->atw_head_dur = htole16(frm->atw_head_dur); 3245 } 3246 3247 #ifdef ATW_DEBUG 3248 static void 3249 atw_dump_pkt(struct ifnet *ifp, struct mbuf *m0) 3250 { 3251 struct atw_softc *sc = ifp->if_softc; 3252 struct mbuf *m; 3253 int i, noctets = 0; 3254 3255 printf("%s: %d-byte packet\n", sc->sc_dev.dv_xname, 3256 m0->m_pkthdr.len); 3257 3258 for (m = m0; m; m = m->m_next) { 3259 if (m->m_len == 0) 3260 continue; 3261 for (i = 0; i < m->m_len; i++) { 3262 printf(" %02x", ((u_int8_t*)m->m_data)[i]); 3263 if (++noctets % 24 == 0) 3264 printf("\n"); 3265 } 3266 } 3267 printf("%s%s: %d bytes emitted\n", 3268 (noctets % 24 != 0) ? "\n" : "", sc->sc_dev.dv_xname, noctets); 3269 } 3270 #endif /* ATW_DEBUG */ 3271 3272 /* 3273 * atw_start: [ifnet interface function] 3274 * 3275 * Start packet transmission on the interface. 3276 */ 3277 void 3278 atw_start(struct ifnet *ifp) 3279 { 3280 struct atw_softc *sc = ifp->if_softc; 3281 struct ieee80211com *ic = &sc->sc_ic; 3282 struct ieee80211_node *ni; 3283 struct ieee80211_frame *wh; 3284 struct atw_frame *hh; 3285 struct mbuf *m0, *m; 3286 struct atw_txsoft *txs, *last_txs; 3287 struct atw_txdesc *txd; 3288 int do_encrypt, rate; 3289 bus_dmamap_t dmamap; 3290 int ctl, error, firsttx, nexttx, lasttx = -1, first, ofree, seg; 3291 3292 DPRINTF2(sc, ("%s: atw_start: sc_flags 0x%08x, if_flags 0x%08x\n", 3293 sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags)); 3294 3295 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 3296 return; 3297 3298 /* 3299 * Remember the previous number of free descriptors and 3300 * the first descriptor we'll use. 3301 */ 3302 ofree = sc->sc_txfree; 3303 firsttx = sc->sc_txnext; 3304 3305 DPRINTF2(sc, ("%s: atw_start: txfree %d, txnext %d\n", 3306 sc->sc_dev.dv_xname, ofree, firsttx)); 3307 3308 /* 3309 * Loop through the send queue, setting up transmit descriptors 3310 * until we drain the queue, or use up all available transmit 3311 * descriptors. 3312 */ 3313 while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && 3314 sc->sc_txfree != 0) { 3315 3316 /* 3317 * Grab a packet off the management queue, if it 3318 * is not empty. Otherwise, from the data queue. 3319 */ 3320 IF_DEQUEUE(&ic->ic_mgtq, m0); 3321 if (m0 != NULL) { 3322 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 3323 m0->m_pkthdr.rcvif = NULL; 3324 } else { 3325 /* send no data packets until we are associated */ 3326 if (ic->ic_state != IEEE80211_S_RUN) 3327 break; 3328 IFQ_DEQUEUE(&ifp->if_snd, m0); 3329 if (m0 == NULL) 3330 break; 3331 #if NBPFILTER > 0 3332 if (ifp->if_bpf != NULL) 3333 bpf_mtap(ifp->if_bpf, m0); 3334 #endif /* NBPFILTER > 0 */ 3335 if ((m0 = ieee80211_encap(ifp, m0, &ni)) == NULL) { 3336 ifp->if_oerrors++; 3337 break; 3338 } 3339 } 3340 3341 rate = MAX(ieee80211_get_rate(ic), 2); 3342 3343 #if NBPFILTER > 0 3344 /* 3345 * Pass the packet to any BPF listeners. 3346 */ 3347 if (ic->ic_rawbpf != NULL) 3348 bpf_mtap((caddr_t)ic->ic_rawbpf, m0); 3349 3350 if (sc->sc_radiobpf != NULL) { 3351 struct atw_tx_radiotap_header *tap = &sc->sc_txtap; 3352 3353 tap->at_rate = rate; 3354 tap->at_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3355 tap->at_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3356 3357 /* TBD tap->at_flags */ 3358 3359 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3360 tap->at_ihdr.it_len, m0); 3361 } 3362 #endif /* NBPFILTER > 0 */ 3363 3364 M_PREPEND(m0, offsetof(struct atw_frame, atw_ihdr), M_DONTWAIT); 3365 3366 if (ni != NULL && ni != ic->ic_bss) 3367 ieee80211_free_node(ic, ni); 3368 3369 if (m0 == NULL) { 3370 ifp->if_oerrors++; 3371 break; 3372 } 3373 3374 /* just to make sure. */ 3375 m0 = m_pullup(m0, sizeof(struct atw_frame)); 3376 3377 if (m0 == NULL) { 3378 ifp->if_oerrors++; 3379 break; 3380 } 3381 3382 hh = mtod(m0, struct atw_frame *); 3383 wh = &hh->atw_ihdr; 3384 3385 do_encrypt = ((wh->i_fc[1] & IEEE80211_FC1_WEP) != 0) ? 1 : 0; 3386 3387 /* Copy everything we need from the 802.11 header: 3388 * Frame Control; address 1, address 3, or addresses 3389 * 3 and 4. NIC fills in BSSID, SA. 3390 */ 3391 if (wh->i_fc[1] & IEEE80211_FC1_DIR_TODS) { 3392 if (wh->i_fc[1] & IEEE80211_FC1_DIR_FROMDS) 3393 panic("%s: illegal WDS frame", 3394 sc->sc_dev.dv_xname); 3395 memcpy(hh->atw_dst, wh->i_addr3, IEEE80211_ADDR_LEN); 3396 } else 3397 memcpy(hh->atw_dst, wh->i_addr1, IEEE80211_ADDR_LEN); 3398 3399 *(u_int16_t*)hh->atw_fc = *(u_int16_t*)wh->i_fc; 3400 3401 /* initialize remaining Tx parameters */ 3402 memset(&hh->u, 0, sizeof(hh->u)); 3403 3404 hh->atw_rate = rate * 5; 3405 /* XXX this could be incorrect if M_FCS. _encap should 3406 * probably strip FCS just in case it sticks around in 3407 * bridged packets. 3408 */ 3409 hh->atw_service = IEEE80211_PLCP_SERVICE; /* XXX guess */ 3410 hh->atw_paylen = htole16(m0->m_pkthdr.len - 3411 sizeof(struct atw_frame)); 3412 3413 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3414 hh->atw_rtylmt = 3; 3415 hh->atw_hdrctl = htole16(ATW_HDRCTL_UNKNOWN1); 3416 if (do_encrypt) { 3417 hh->atw_hdrctl |= htole16(ATW_HDRCTL_WEP); 3418 hh->atw_keyid = ic->ic_wep_txkey; 3419 } 3420 3421 /* TBD 4-addr frames */ 3422 atw_frame_setdurs(sc, hh, rate, 3423 m0->m_pkthdr.len - sizeof(struct atw_frame) + 3424 sizeof(struct ieee80211_frame) + IEEE80211_CRC_LEN); 3425 3426 /* never fragment multicast frames */ 3427 if (IEEE80211_IS_MULTICAST(hh->atw_dst)) { 3428 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3429 } else if (sc->sc_flags & ATWF_RTSCTS) { 3430 hh->atw_hdrctl |= htole16(ATW_HDRCTL_RTSCTS); 3431 } 3432 3433 #ifdef ATW_DEBUG 3434 hh->atw_fragnum = 0; 3435 3436 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3437 printf("%s: dst = %s, rate = 0x%02x, " 3438 "service = 0x%02x, paylen = 0x%04x\n", 3439 sc->sc_dev.dv_xname, ether_sprintf(hh->atw_dst), 3440 hh->atw_rate, hh->atw_service, hh->atw_paylen); 3441 3442 printf("%s: fc[0] = 0x%02x, fc[1] = 0x%02x, " 3443 "dur1 = 0x%04x, dur2 = 0x%04x, " 3444 "dur3 = 0x%04x, rts_dur = 0x%04x\n", 3445 sc->sc_dev.dv_xname, hh->atw_fc[0], hh->atw_fc[1], 3446 hh->atw_tail_plcplen, hh->atw_head_plcplen, 3447 hh->atw_tail_dur, hh->atw_head_dur); 3448 3449 printf("%s: hdrctl = 0x%04x, fragthr = 0x%04x, " 3450 "fragnum = 0x%02x, rtylmt = 0x%04x\n", 3451 sc->sc_dev.dv_xname, hh->atw_hdrctl, 3452 hh->atw_fragthr, hh->atw_fragnum, hh->atw_rtylmt); 3453 3454 printf("%s: keyid = %d\n", 3455 sc->sc_dev.dv_xname, hh->atw_keyid); 3456 3457 atw_dump_pkt(ifp, m0); 3458 } 3459 #endif /* ATW_DEBUG */ 3460 3461 dmamap = txs->txs_dmamap; 3462 3463 /* 3464 * Load the DMA map. Copy and try (once) again if the packet 3465 * didn't fit in the alloted number of segments. 3466 */ 3467 for (first = 1; 3468 (error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 3469 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 && first; 3470 first = 0) { 3471 MGETHDR(m, M_DONTWAIT, MT_DATA); 3472 if (m == NULL) { 3473 printf("%s: unable to allocate Tx mbuf\n", 3474 sc->sc_dev.dv_xname); 3475 break; 3476 } 3477 if (m0->m_pkthdr.len > MHLEN) { 3478 MCLGET(m, M_DONTWAIT); 3479 if ((m->m_flags & M_EXT) == 0) { 3480 printf("%s: unable to allocate Tx " 3481 "cluster\n", sc->sc_dev.dv_xname); 3482 m_freem(m); 3483 break; 3484 } 3485 } 3486 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 3487 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 3488 m_freem(m0); 3489 m0 = m; 3490 m = NULL; 3491 } 3492 if (error != 0) { 3493 printf("%s: unable to load Tx buffer, " 3494 "error = %d\n", sc->sc_dev.dv_xname, error); 3495 m_freem(m0); 3496 break; 3497 } 3498 3499 /* 3500 * Ensure we have enough descriptors free to describe 3501 * the packet. 3502 */ 3503 if (dmamap->dm_nsegs > sc->sc_txfree) { 3504 /* 3505 * Not enough free descriptors to transmit 3506 * this packet. Unload the DMA map and 3507 * drop the packet. Notify the upper layer 3508 * that there are no more slots left. 3509 * 3510 * XXX We could allocate an mbuf and copy, but 3511 * XXX it is worth it? 3512 */ 3513 ifp->if_flags |= IFF_OACTIVE; 3514 bus_dmamap_unload(sc->sc_dmat, dmamap); 3515 m_freem(m0); 3516 break; 3517 } 3518 3519 /* 3520 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 3521 */ 3522 3523 /* Sync the DMA map. */ 3524 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 3525 BUS_DMASYNC_PREWRITE); 3526 3527 /* XXX arbitrary retry limit; 8 because I have seen it in 3528 * use already and maybe 0 means "no tries" ! 3529 */ 3530 ctl = htole32(LSHIFT(8, ATW_TXCTL_TL_MASK)); 3531 3532 DPRINTF2(sc, ("%s: TXDR <- max(10, %d)\n", 3533 sc->sc_dev.dv_xname, rate * 5)); 3534 ctl |= htole32(LSHIFT(MAX(10, rate * 5), ATW_TXCTL_TXDR_MASK)); 3535 3536 /* 3537 * Initialize the transmit descriptors. 3538 */ 3539 for (nexttx = sc->sc_txnext, seg = 0; 3540 seg < dmamap->dm_nsegs; 3541 seg++, nexttx = ATW_NEXTTX(nexttx)) { 3542 /* 3543 * If this is the first descriptor we're 3544 * enqueueing, don't set the OWN bit just 3545 * yet. That could cause a race condition. 3546 * We'll do it below. 3547 */ 3548 txd = &sc->sc_txdescs[nexttx]; 3549 txd->at_ctl = ctl | 3550 ((nexttx == firsttx) ? 0 : htole32(ATW_TXCTL_OWN)); 3551 3552 txd->at_buf1 = htole32(dmamap->dm_segs[seg].ds_addr); 3553 txd->at_flags = 3554 htole32(LSHIFT(dmamap->dm_segs[seg].ds_len, 3555 ATW_TXFLAG_TBS1_MASK)) | 3556 ((nexttx == (ATW_NTXDESC - 1)) 3557 ? htole32(ATW_TXFLAG_TER) : 0); 3558 lasttx = nexttx; 3559 } 3560 3561 IASSERT(lasttx != -1, ("bad lastx")); 3562 /* Set `first segment' and `last segment' appropriately. */ 3563 sc->sc_txdescs[sc->sc_txnext].at_flags |= 3564 htole32(ATW_TXFLAG_FS); 3565 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_LS); 3566 3567 #ifdef ATW_DEBUG 3568 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3569 printf(" txsoft %p transmit chain:\n", txs); 3570 for (seg = sc->sc_txnext;; seg = ATW_NEXTTX(seg)) { 3571 printf(" descriptor %d:\n", seg); 3572 printf(" at_ctl: 0x%08x\n", 3573 le32toh(sc->sc_txdescs[seg].at_ctl)); 3574 printf(" at_flags: 0x%08x\n", 3575 le32toh(sc->sc_txdescs[seg].at_flags)); 3576 printf(" at_buf1: 0x%08x\n", 3577 le32toh(sc->sc_txdescs[seg].at_buf1)); 3578 printf(" at_buf2: 0x%08x\n", 3579 le32toh(sc->sc_txdescs[seg].at_buf2)); 3580 if (seg == lasttx) 3581 break; 3582 } 3583 } 3584 #endif 3585 3586 /* Sync the descriptors we're using. */ 3587 ATW_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 3588 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3589 3590 /* 3591 * Store a pointer to the packet so we can free it later, 3592 * and remember what txdirty will be once the packet is 3593 * done. 3594 */ 3595 txs->txs_mbuf = m0; 3596 txs->txs_firstdesc = sc->sc_txnext; 3597 txs->txs_lastdesc = lasttx; 3598 txs->txs_ndescs = dmamap->dm_nsegs; 3599 3600 /* Advance the tx pointer. */ 3601 sc->sc_txfree -= dmamap->dm_nsegs; 3602 sc->sc_txnext = nexttx; 3603 3604 SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 3605 SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 3606 3607 last_txs = txs; 3608 } 3609 3610 if (txs == NULL || sc->sc_txfree == 0) { 3611 /* No more slots left; notify upper layer. */ 3612 ifp->if_flags |= IFF_OACTIVE; 3613 } 3614 3615 if (sc->sc_txfree != ofree) { 3616 DPRINTF2(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", 3617 sc->sc_dev.dv_xname, lasttx, firsttx)); 3618 /* 3619 * Cause a transmit interrupt to happen on the 3620 * last packet we enqueued. 3621 */ 3622 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_IC); 3623 ATW_CDTXSYNC(sc, lasttx, 1, 3624 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3625 3626 /* 3627 * The entire packet chain is set up. Give the 3628 * first descriptor to the chip now. 3629 */ 3630 sc->sc_txdescs[firsttx].at_ctl |= htole32(ATW_TXCTL_OWN); 3631 ATW_CDTXSYNC(sc, firsttx, 1, 3632 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3633 3634 /* Wake up the transmitter. */ 3635 ATW_WRITE(sc, ATW_TDR, 0x1); 3636 3637 /* Set a watchdog timer in case the chip flakes out. */ 3638 sc->sc_tx_timer = 5; 3639 ifp->if_timer = 1; 3640 } 3641 } 3642 3643 /* 3644 * atw_power: 3645 * 3646 * Power management (suspend/resume) hook. 3647 */ 3648 void 3649 atw_power(int why, void *arg) 3650 { 3651 struct atw_softc *sc = arg; 3652 struct ifnet *ifp = &sc->sc_ic.ic_if; 3653 int s; 3654 3655 DPRINTF(sc, ("%s: atw_power(%d,)\n", sc->sc_dev.dv_xname, why)); 3656 3657 s = splnet(); 3658 switch (why) { 3659 case PWR_STANDBY: 3660 /* XXX do nothing. */ 3661 break; 3662 case PWR_SUSPEND: 3663 atw_stop(ifp, 0); 3664 if (sc->sc_power != NULL) 3665 (*sc->sc_power)(sc, why); 3666 break; 3667 case PWR_RESUME: 3668 if (ifp->if_flags & IFF_UP) { 3669 if (sc->sc_power != NULL) 3670 (*sc->sc_power)(sc, why); 3671 atw_init(ifp); 3672 } 3673 break; 3674 case PWR_SOFTSUSPEND: 3675 case PWR_SOFTSTANDBY: 3676 case PWR_SOFTRESUME: 3677 break; 3678 } 3679 splx(s); 3680 } 3681 3682 /* 3683 * atw_ioctl: [ifnet interface function] 3684 * 3685 * Handle control requests from the operator. 3686 */ 3687 int 3688 atw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 3689 { 3690 struct atw_softc *sc = ifp->if_softc; 3691 struct ifreq *ifr = (struct ifreq *)data; 3692 int s, error = 0; 3693 3694 /* XXX monkey see, monkey do. comes from wi_ioctl. */ 3695 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 3696 return ENXIO; 3697 3698 s = splnet(); 3699 3700 switch (cmd) { 3701 case SIOCSIFFLAGS: 3702 if (ifp->if_flags & IFF_UP) { 3703 if (ATW_IS_ENABLED(sc)) { 3704 /* 3705 * To avoid rescanning another access point, 3706 * do not call atw_init() here. Instead, 3707 * only reflect media settings. 3708 */ 3709 atw_filter_setup(sc); 3710 } else 3711 error = atw_init(ifp); 3712 } else if (ATW_IS_ENABLED(sc)) 3713 atw_stop(ifp, 1); 3714 break; 3715 case SIOCADDMULTI: 3716 case SIOCDELMULTI: 3717 error = (cmd == SIOCADDMULTI) ? 3718 ether_addmulti(ifr, &sc->sc_ic.ic_ec) : 3719 ether_delmulti(ifr, &sc->sc_ic.ic_ec); 3720 if (error == ENETRESET) { 3721 if (ATW_IS_ENABLED(sc)) 3722 atw_filter_setup(sc); /* do not rescan */ 3723 error = 0; 3724 } 3725 break; 3726 default: 3727 error = ieee80211_ioctl(ifp, cmd, data); 3728 if (error == ENETRESET) { 3729 if (ATW_IS_ENABLED(sc)) 3730 error = atw_init(ifp); 3731 else 3732 error = 0; 3733 } 3734 break; 3735 } 3736 3737 /* Try to get more packets going. */ 3738 if (ATW_IS_ENABLED(sc)) 3739 atw_start(ifp); 3740 3741 splx(s); 3742 return (error); 3743 } 3744 3745 static int 3746 atw_media_change(struct ifnet *ifp) 3747 { 3748 int error; 3749 3750 error = ieee80211_media_change(ifp); 3751 if (error == ENETRESET) { 3752 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == 3753 (IFF_RUNNING|IFF_UP)) 3754 atw_init(ifp); /* XXX lose error */ 3755 error = 0; 3756 } 3757 return error; 3758 } 3759 3760 static void 3761 atw_media_status(struct ifnet *ifp, struct ifmediareq *imr) 3762 { 3763 struct atw_softc *sc = ifp->if_softc; 3764 3765 if (ATW_IS_ENABLED(sc) == 0) { 3766 imr->ifm_active = IFM_IEEE80211 | IFM_NONE; 3767 imr->ifm_status = 0; 3768 return; 3769 } 3770 ieee80211_media_status(ifp, imr); 3771 } 3772
Indexes created Thu Sep 25 16:09:42 GMT 2025