atw.c revision 1.39
1 /* $NetBSD: atw.c,v 1.39 2004/07/15 05:54:13 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 1.39 2004/07/15 05:54:13 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_bcn_thresh(struct atw_softc *); 215 static void atw_write_ssid(struct atw_softc *); 216 static void atw_write_sup_rates(struct atw_softc *); 217 static void atw_clear_sram(struct atw_softc *); 218 static void atw_write_sram(struct atw_softc *, u_int, u_int8_t *, u_int); 219 static int atw_media_change(struct ifnet *); 220 static void atw_media_status(struct ifnet *, struct ifmediareq *); 221 static void atw_filter_setup(struct atw_softc *); 222 static void atw_frame_setdurs(struct atw_softc *, struct atw_frame *, int, int); 223 static __inline u_int64_t atw_predict_beacon(u_int64_t, u_int32_t); 224 static void atw_recv_beacon(struct ieee80211com *, struct mbuf *, 225 struct ieee80211_node *, int, int, u_int32_t); 226 static void atw_recv_mgmt(struct ieee80211com *, struct mbuf *, 227 struct ieee80211_node *, int, int, u_int32_t); 228 static void atw_node_free(struct ieee80211com *, struct ieee80211_node *); 229 static struct ieee80211_node *atw_node_alloc(struct ieee80211com *); 230 231 static int atw_tune(struct atw_softc *); 232 233 static void atw_rfio_enable(struct atw_softc *, int); 234 235 /* RFMD RF3000 Baseband Processor */ 236 static int atw_rf3000_init(struct atw_softc *); 237 static int atw_rf3000_tune(struct atw_softc *, u_int8_t); 238 static int atw_rf3000_write(struct atw_softc *, u_int, u_int); 239 #ifdef ATW_DEBUG 240 static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 241 #endif /* ATW_DEBUG */ 242 243 /* Silicon Laboratories Si4126 RF/IF Synthesizer */ 244 static int atw_si4126_tune(struct atw_softc *, u_int8_t); 245 static int atw_si4126_write(struct atw_softc *, u_int, u_int); 246 #ifdef ATW_DEBUG 247 static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 248 #endif /* ATW_DEBUG */ 249 250 const struct atw_txthresh_tab atw_txthresh_tab_lo[] = ATW_TXTHRESH_TAB_LO_RATE; 251 const struct atw_txthresh_tab atw_txthresh_tab_hi[] = ATW_TXTHRESH_TAB_HI_RATE; 252 253 const char *atw_tx_state[] = { 254 "STOPPED", 255 "RUNNING - read descriptor", 256 "RUNNING - transmitting", 257 "RUNNING - filling fifo", /* XXX */ 258 "SUSPENDED", 259 "RUNNING -- write descriptor", 260 "RUNNING -- write last descriptor", 261 "RUNNING - fifo full" 262 }; 263 264 const char *atw_rx_state[] = { 265 "STOPPED", 266 "RUNNING - read descriptor", 267 "RUNNING - check this packet, pre-fetch next", 268 "RUNNING - wait for reception", 269 "SUSPENDED", 270 "RUNNING - write descriptor", 271 "RUNNING - flush fifo", 272 "RUNNING - fifo drain" 273 }; 274 275 int 276 atw_activate(struct device *self, enum devact act) 277 { 278 struct atw_softc *sc = (struct atw_softc *)self; 279 int rv = 0, s; 280 281 s = splnet(); 282 switch (act) { 283 case DVACT_ACTIVATE: 284 rv = EOPNOTSUPP; 285 break; 286 287 case DVACT_DEACTIVATE: 288 if_deactivate(&sc->sc_ic.ic_if); 289 break; 290 } 291 splx(s); 292 return rv; 293 } 294 295 /* 296 * atw_enable: 297 * 298 * Enable the ADM8211 chip. 299 */ 300 int 301 atw_enable(struct atw_softc *sc) 302 { 303 304 if (ATW_IS_ENABLED(sc) == 0) { 305 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 306 printf("%s: device enable failed\n", 307 sc->sc_dev.dv_xname); 308 return (EIO); 309 } 310 sc->sc_flags |= ATWF_ENABLED; 311 } 312 return (0); 313 } 314 315 /* 316 * atw_disable: 317 * 318 * Disable the ADM8211 chip. 319 */ 320 void 321 atw_disable(struct atw_softc *sc) 322 { 323 if (!ATW_IS_ENABLED(sc)) 324 return; 325 if (sc->sc_disable != NULL) 326 (*sc->sc_disable)(sc); 327 sc->sc_flags &= ~ATWF_ENABLED; 328 } 329 330 /* Returns -1 on failure. */ 331 int 332 atw_read_srom(struct atw_softc *sc) 333 { 334 struct seeprom_descriptor sd; 335 u_int32_t reg; 336 337 (void)memset(&sd, 0, sizeof(sd)); 338 339 reg = ATW_READ(sc, ATW_TEST0); 340 341 if ((reg & (ATW_TEST0_EPNE|ATW_TEST0_EPSNM)) != 0) { 342 printf("%s: bad or missing/bad SROM\n", sc->sc_dev.dv_xname); 343 return -1; 344 } 345 346 switch (reg & ATW_TEST0_EPTYP_MASK) { 347 case ATW_TEST0_EPTYP_93c66: 348 ATW_DPRINTF(("%s: 93c66 SROM\n", sc->sc_dev.dv_xname)); 349 sc->sc_sromsz = 512; 350 sd.sd_chip = C56_66; 351 break; 352 case ATW_TEST0_EPTYP_93c46: 353 ATW_DPRINTF(("%s: 93c46 SROM\n", sc->sc_dev.dv_xname)); 354 sc->sc_sromsz = 128; 355 sd.sd_chip = C46; 356 break; 357 default: 358 printf("%s: unknown SROM type %d\n", sc->sc_dev.dv_xname, 359 MASK_AND_RSHIFT(reg, ATW_TEST0_EPTYP_MASK)); 360 return -1; 361 } 362 363 sc->sc_srom = malloc(sc->sc_sromsz, M_DEVBUF, M_NOWAIT); 364 365 if (sc->sc_srom == NULL) { 366 printf("%s: unable to allocate SROM buffer\n", 367 sc->sc_dev.dv_xname); 368 return -1; 369 } 370 371 (void)memset(sc->sc_srom, 0, sc->sc_sromsz); 372 373 /* ADM8211 has a single 32-bit register for controlling the 374 * 93cx6 SROM. Bit SRS enables the serial port. There is no 375 * "ready" bit. The ADM8211 input/output sense is the reverse 376 * of read_seeprom's. 377 */ 378 sd.sd_tag = sc->sc_st; 379 sd.sd_bsh = sc->sc_sh; 380 sd.sd_regsize = 4; 381 sd.sd_control_offset = ATW_SPR; 382 sd.sd_status_offset = ATW_SPR; 383 sd.sd_dataout_offset = ATW_SPR; 384 sd.sd_CK = ATW_SPR_SCLK; 385 sd.sd_CS = ATW_SPR_SCS; 386 sd.sd_DI = ATW_SPR_SDO; 387 sd.sd_DO = ATW_SPR_SDI; 388 sd.sd_MS = ATW_SPR_SRS; 389 sd.sd_RDY = 0; 390 391 if (!read_seeprom(&sd, sc->sc_srom, 0, sc->sc_sromsz/2)) { 392 printf("%s: could not read SROM\n", sc->sc_dev.dv_xname); 393 free(sc->sc_srom, M_DEVBUF); 394 return -1; 395 } 396 #ifdef ATW_DEBUG 397 { 398 int i; 399 ATW_DPRINTF(("\nSerial EEPROM:\n\t")); 400 for (i = 0; i < sc->sc_sromsz/2; i = i + 1) { 401 if (((i % 8) == 0) && (i != 0)) { 402 ATW_DPRINTF(("\n\t")); 403 } 404 ATW_DPRINTF((" 0x%x", sc->sc_srom[i])); 405 } 406 ATW_DPRINTF(("\n")); 407 } 408 #endif /* ATW_DEBUG */ 409 return 0; 410 } 411 412 #ifdef ATW_DEBUG 413 static void 414 atw_print_regs(struct atw_softc *sc, const char *where) 415 { 416 #define PRINTREG(sc, reg) \ 417 ATW_DPRINTF2(("%s: reg[ " #reg " / %03x ] = %08x\n", \ 418 sc->sc_dev.dv_xname, reg, ATW_READ(sc, reg))) 419 420 ATW_DPRINTF2(("%s: %s\n", sc->sc_dev.dv_xname, where)); 421 422 PRINTREG(sc, ATW_PAR); 423 PRINTREG(sc, ATW_FRCTL); 424 PRINTREG(sc, ATW_TDR); 425 PRINTREG(sc, ATW_WTDP); 426 PRINTREG(sc, ATW_RDR); 427 PRINTREG(sc, ATW_WRDP); 428 PRINTREG(sc, ATW_RDB); 429 PRINTREG(sc, ATW_CSR3A); 430 PRINTREG(sc, ATW_TDBD); 431 PRINTREG(sc, ATW_TDBP); 432 PRINTREG(sc, ATW_STSR); 433 PRINTREG(sc, ATW_CSR5A); 434 PRINTREG(sc, ATW_NAR); 435 PRINTREG(sc, ATW_CSR6A); 436 PRINTREG(sc, ATW_IER); 437 PRINTREG(sc, ATW_CSR7A); 438 PRINTREG(sc, ATW_LPC); 439 PRINTREG(sc, ATW_TEST1); 440 PRINTREG(sc, ATW_SPR); 441 PRINTREG(sc, ATW_TEST0); 442 PRINTREG(sc, ATW_WCSR); 443 PRINTREG(sc, ATW_WPDR); 444 PRINTREG(sc, ATW_GPTMR); 445 PRINTREG(sc, ATW_GPIO); 446 PRINTREG(sc, ATW_BBPCTL); 447 PRINTREG(sc, ATW_SYNCTL); 448 PRINTREG(sc, ATW_PLCPHD); 449 PRINTREG(sc, ATW_MMIWADDR); 450 PRINTREG(sc, ATW_MMIRADDR1); 451 PRINTREG(sc, ATW_MMIRADDR2); 452 PRINTREG(sc, ATW_TXBR); 453 PRINTREG(sc, ATW_CSR15A); 454 PRINTREG(sc, ATW_ALCSTAT); 455 PRINTREG(sc, ATW_TOFS2); 456 PRINTREG(sc, ATW_CMDR); 457 PRINTREG(sc, ATW_PCIC); 458 PRINTREG(sc, ATW_PMCSR); 459 PRINTREG(sc, ATW_PAR0); 460 PRINTREG(sc, ATW_PAR1); 461 PRINTREG(sc, ATW_MAR0); 462 PRINTREG(sc, ATW_MAR1); 463 PRINTREG(sc, ATW_ATIMDA0); 464 PRINTREG(sc, ATW_ABDA1); 465 PRINTREG(sc, ATW_BSSID0); 466 PRINTREG(sc, ATW_TXLMT); 467 PRINTREG(sc, ATW_MIBCNT); 468 PRINTREG(sc, ATW_BCNT); 469 PRINTREG(sc, ATW_TSFTH); 470 PRINTREG(sc, ATW_TSC); 471 PRINTREG(sc, ATW_SYNRF); 472 PRINTREG(sc, ATW_BPLI); 473 PRINTREG(sc, ATW_CAP0); 474 PRINTREG(sc, ATW_CAP1); 475 PRINTREG(sc, ATW_RMD); 476 PRINTREG(sc, ATW_CFPP); 477 PRINTREG(sc, ATW_TOFS0); 478 PRINTREG(sc, ATW_TOFS1); 479 PRINTREG(sc, ATW_IFST); 480 PRINTREG(sc, ATW_RSPT); 481 PRINTREG(sc, ATW_TSFTL); 482 PRINTREG(sc, ATW_WEPCTL); 483 PRINTREG(sc, ATW_WESK); 484 PRINTREG(sc, ATW_WEPCNT); 485 PRINTREG(sc, ATW_MACTEST); 486 PRINTREG(sc, ATW_FER); 487 PRINTREG(sc, ATW_FEMR); 488 PRINTREG(sc, ATW_FPSR); 489 PRINTREG(sc, ATW_FFER); 490 #undef PRINTREG 491 } 492 #endif /* ATW_DEBUG */ 493 494 /* 495 * Finish attaching an ADMtek ADM8211 MAC. Called by bus-specific front-end. 496 */ 497 void 498 atw_attach(struct atw_softc *sc) 499 { 500 static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = { 501 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 502 }; 503 struct ieee80211com *ic = &sc->sc_ic; 504 struct ifnet *ifp = &ic->ic_if; 505 int country_code, error, i, nrate; 506 u_int32_t reg; 507 static const char *type_strings[] = {"Intersil (not supported)", 508 "RFMD", "Marvel (not supported)"}; 509 510 sc->sc_txth = atw_txthresh_tab_lo; 511 512 SIMPLEQ_INIT(&sc->sc_txfreeq); 513 SIMPLEQ_INIT(&sc->sc_txdirtyq); 514 515 #ifdef ATW_DEBUG 516 atw_print_regs(sc, "atw_attach"); 517 #endif /* ATW_DEBUG */ 518 519 /* 520 * Allocate the control data structures, and create and load the 521 * DMA map for it. 522 */ 523 if ((error = bus_dmamem_alloc(sc->sc_dmat, 524 sizeof(struct atw_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 525 1, &sc->sc_cdnseg, 0)) != 0) { 526 printf("%s: unable to allocate control data, error = %d\n", 527 sc->sc_dev.dv_xname, error); 528 goto fail_0; 529 } 530 531 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg, 532 sizeof(struct atw_control_data), (caddr_t *)&sc->sc_control_data, 533 BUS_DMA_COHERENT)) != 0) { 534 printf("%s: unable to map control data, error = %d\n", 535 sc->sc_dev.dv_xname, error); 536 goto fail_1; 537 } 538 539 if ((error = bus_dmamap_create(sc->sc_dmat, 540 sizeof(struct atw_control_data), 1, 541 sizeof(struct atw_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 542 printf("%s: unable to create control data DMA map, " 543 "error = %d\n", sc->sc_dev.dv_xname, error); 544 goto fail_2; 545 } 546 547 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 548 sc->sc_control_data, sizeof(struct atw_control_data), NULL, 549 0)) != 0) { 550 printf("%s: unable to load control data DMA map, error = %d\n", 551 sc->sc_dev.dv_xname, error); 552 goto fail_3; 553 } 554 555 /* 556 * Create the transmit buffer DMA maps. 557 */ 558 sc->sc_ntxsegs = ATW_NTXSEGS; 559 for (i = 0; i < ATW_TXQUEUELEN; i++) { 560 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 561 sc->sc_ntxsegs, MCLBYTES, 0, 0, 562 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 563 printf("%s: unable to create tx DMA map %d, " 564 "error = %d\n", sc->sc_dev.dv_xname, i, error); 565 goto fail_4; 566 } 567 } 568 569 /* 570 * Create the receive buffer DMA maps. 571 */ 572 for (i = 0; i < ATW_NRXDESC; i++) { 573 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 574 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 575 printf("%s: unable to create rx DMA map %d, " 576 "error = %d\n", sc->sc_dev.dv_xname, i, error); 577 goto fail_5; 578 } 579 } 580 for (i = 0; i < ATW_NRXDESC; i++) { 581 sc->sc_rxsoft[i].rxs_mbuf = NULL; 582 } 583 584 /* Reset the chip to a known state. */ 585 atw_reset(sc); 586 587 if (atw_read_srom(sc) == -1) 588 return; 589 590 sc->sc_rftype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 591 ATW_SR_RFTYPE_MASK); 592 593 sc->sc_bbptype = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CSR20], 594 ATW_SR_BBPTYPE_MASK); 595 596 if (sc->sc_rftype > sizeof(type_strings)/sizeof(type_strings[0])) { 597 printf("%s: unknown RF\n", sc->sc_dev.dv_xname); 598 return; 599 } 600 if (sc->sc_bbptype > sizeof(type_strings)/sizeof(type_strings[0])) { 601 printf("%s: unknown BBP\n", sc->sc_dev.dv_xname); 602 return; 603 } 604 605 printf("%s: %s RF, %s BBP", sc->sc_dev.dv_xname, 606 type_strings[sc->sc_rftype], type_strings[sc->sc_bbptype]); 607 608 /* XXX There exists a Linux driver which seems to use RFType = 0 for 609 * MARVEL. My bug, or theirs? 610 */ 611 612 reg = LSHIFT(sc->sc_rftype, ATW_SYNCTL_RFTYPE_MASK); 613 614 switch (sc->sc_rftype) { 615 case ATW_RFTYPE_INTERSIL: 616 reg |= ATW_SYNCTL_CS1; 617 break; 618 case ATW_RFTYPE_RFMD: 619 reg |= ATW_SYNCTL_CS0; 620 break; 621 case ATW_RFTYPE_MARVEL: 622 break; 623 } 624 625 sc->sc_synctl_rd = reg | ATW_SYNCTL_RD; 626 sc->sc_synctl_wr = reg | ATW_SYNCTL_WR; 627 628 reg = LSHIFT(sc->sc_bbptype, ATW_BBPCTL_TYPE_MASK); 629 630 switch (sc->sc_bbptype) { 631 case ATW_BBPTYPE_INTERSIL: 632 reg |= ATW_BBPCTL_TWI; 633 break; 634 case ATW_BBPTYPE_RFMD: 635 reg |= ATW_BBPCTL_RF3KADDR_ADDR | ATW_BBPCTL_NEGEDGE_DO | 636 ATW_BBPCTL_CCA_ACTLO; 637 break; 638 case ATW_BBPTYPE_MARVEL: 639 break; 640 case ATW_C_BBPTYPE_RFMD: 641 printf("%s: ADM8211C MAC/RFMD BBP not supported yet.\n", 642 sc->sc_dev.dv_xname); 643 break; 644 } 645 646 sc->sc_bbpctl_wr = reg | ATW_BBPCTL_WR; 647 sc->sc_bbpctl_rd = reg | ATW_BBPCTL_RD; 648 649 /* 650 * From this point forward, the attachment cannot fail. A failure 651 * before this point releases all resources that may have been 652 * allocated. 653 */ 654 sc->sc_flags |= ATWF_ATTACHED /* | ATWF_RTSCTS */; 655 656 ATW_DPRINTF((" SROM MAC %04x%04x%04x", 657 htole16(sc->sc_srom[ATW_SR_MAC00]), 658 htole16(sc->sc_srom[ATW_SR_MAC01]), 659 htole16(sc->sc_srom[ATW_SR_MAC10]))); 660 661 country_code = MASK_AND_RSHIFT(sc->sc_srom[ATW_SR_CTRY_CR29], 662 ATW_SR_CTRY_MASK); 663 664 #define ADD_CHANNEL(_ic, _chan) do { \ 665 _ic->ic_channels[_chan].ic_flags = IEEE80211_CHAN_B; \ 666 _ic->ic_channels[_chan].ic_freq = \ 667 ieee80211_ieee2mhz(_chan, _ic->ic_channels[_chan].ic_flags);\ 668 } while (0) 669 670 /* Find available channels */ 671 switch (country_code) { 672 case COUNTRY_MMK2: /* 1-14 */ 673 ADD_CHANNEL(ic, 14); 674 /*FALLTHROUGH*/ 675 case COUNTRY_ETSI: /* 1-13 */ 676 for (i = 1; i <= 13; i++) 677 ADD_CHANNEL(ic, i); 678 break; 679 case COUNTRY_FCC: /* 1-11 */ 680 case COUNTRY_IC: /* 1-11 */ 681 for (i = 1; i <= 11; i++) 682 ADD_CHANNEL(ic, i); 683 break; 684 case COUNTRY_MMK: /* 14 */ 685 ADD_CHANNEL(ic, 14); 686 break; 687 case COUNTRY_FRANCE: /* 10-13 */ 688 for (i = 10; i <= 13; i++) 689 ADD_CHANNEL(ic, i); 690 break; 691 default: /* assume channels 10-11 */ 692 case COUNTRY_SPAIN: /* 10-11 */ 693 for (i = 10; i <= 11; i++) 694 ADD_CHANNEL(ic, i); 695 break; 696 } 697 698 /* Read the MAC address. */ 699 reg = ATW_READ(sc, ATW_PAR0); 700 ic->ic_myaddr[0] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB0_MASK); 701 ic->ic_myaddr[1] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB1_MASK); 702 ic->ic_myaddr[2] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB2_MASK); 703 ic->ic_myaddr[3] = MASK_AND_RSHIFT(reg, ATW_PAR0_PAB3_MASK); 704 reg = ATW_READ(sc, ATW_PAR1); 705 ic->ic_myaddr[4] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB4_MASK); 706 ic->ic_myaddr[5] = MASK_AND_RSHIFT(reg, ATW_PAR1_PAB5_MASK); 707 708 if (IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) { 709 printf(" could not get mac address, attach failed\n"); 710 return; 711 } 712 713 printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr)); 714 715 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 716 ifp->if_softc = sc; 717 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST | 718 IFF_NOTRAILERS; 719 ifp->if_ioctl = atw_ioctl; 720 ifp->if_start = atw_start; 721 ifp->if_watchdog = atw_watchdog; 722 ifp->if_init = atw_init; 723 ifp->if_stop = atw_stop; 724 IFQ_SET_READY(&ifp->if_snd); 725 726 ic->ic_phytype = IEEE80211_T_DS; 727 ic->ic_opmode = IEEE80211_M_STA; 728 ic->ic_caps = IEEE80211_C_PMGT | IEEE80211_C_IBSS | 729 IEEE80211_C_HOSTAP | IEEE80211_C_MONITOR | IEEE80211_C_WEP; 730 731 nrate = 0; 732 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 2; 733 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 4; 734 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 11; 735 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 22; 736 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate; 737 738 /* 739 * Call MI attach routines. 740 */ 741 742 if_attach(ifp); 743 ieee80211_ifattach(ifp); 744 745 sc->sc_newstate = ic->ic_newstate; 746 ic->ic_newstate = atw_newstate; 747 748 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 749 ic->ic_recv_mgmt = atw_recv_mgmt; 750 751 sc->sc_node_free = ic->ic_node_free; 752 ic->ic_node_free = atw_node_free; 753 754 sc->sc_node_alloc = ic->ic_node_alloc; 755 ic->ic_node_alloc = atw_node_alloc; 756 757 /* possibly we should fill in our own sc_send_prresp, since 758 * the ADM8211 is probably sending probe responses in ad hoc 759 * mode. 760 */ 761 762 /* complete initialization */ 763 ieee80211_media_init(ifp, atw_media_change, atw_media_status); 764 callout_init(&sc->sc_scan_ch); 765 766 #if NBPFILTER > 0 767 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 768 sizeof(struct ieee80211_frame) + 64, &sc->sc_radiobpf); 769 #endif 770 771 /* 772 * Make sure the interface is shutdown during reboot. 773 */ 774 sc->sc_sdhook = shutdownhook_establish(atw_shutdown, sc); 775 if (sc->sc_sdhook == NULL) 776 printf("%s: WARNING: unable to establish shutdown hook\n", 777 sc->sc_dev.dv_xname); 778 779 /* 780 * Add a suspend hook to make sure we come back up after a 781 * resume. 782 */ 783 sc->sc_powerhook = powerhook_establish(atw_power, sc); 784 if (sc->sc_powerhook == NULL) 785 printf("%s: WARNING: unable to establish power hook\n", 786 sc->sc_dev.dv_xname); 787 788 memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu)); 789 sc->sc_rxtap.ar_ihdr.it_len = sizeof(sc->sc_rxtapu); 790 sc->sc_rxtap.ar_ihdr.it_present = ATW_RX_RADIOTAP_PRESENT; 791 792 memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu)); 793 sc->sc_txtap.at_ihdr.it_len = sizeof(sc->sc_txtapu); 794 sc->sc_txtap.at_ihdr.it_present = ATW_TX_RADIOTAP_PRESENT; 795 796 return; 797 798 /* 799 * Free any resources we've allocated during the failed attach 800 * attempt. Do this in reverse order and fall through. 801 */ 802 fail_5: 803 for (i = 0; i < ATW_NRXDESC; i++) { 804 if (sc->sc_rxsoft[i].rxs_dmamap == NULL) 805 continue; 806 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxsoft[i].rxs_dmamap); 807 } 808 fail_4: 809 for (i = 0; i < ATW_TXQUEUELEN; i++) { 810 if (sc->sc_txsoft[i].txs_dmamap == NULL) 811 continue; 812 bus_dmamap_destroy(sc->sc_dmat, sc->sc_txsoft[i].txs_dmamap); 813 } 814 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 815 fail_3: 816 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 817 fail_2: 818 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 819 sizeof(struct atw_control_data)); 820 fail_1: 821 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 822 fail_0: 823 return; 824 } 825 826 static struct ieee80211_node * 827 atw_node_alloc(struct ieee80211com *ic) 828 { 829 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 830 struct ieee80211_node *ni = (*sc->sc_node_alloc)(ic); 831 832 DPRINTF(sc, ("%s: alloc node %p\n", sc->sc_dev.dv_xname, ni)); 833 return ni; 834 } 835 836 static void 837 atw_node_free(struct ieee80211com *ic, struct ieee80211_node *ni) 838 { 839 struct atw_softc *sc = (struct atw_softc *)ic->ic_if.if_softc; 840 841 DPRINTF(sc, ("%s: freeing node %p %s\n", sc->sc_dev.dv_xname, ni, 842 ether_sprintf(ni->ni_bssid))); 843 (*sc->sc_node_free)(ic, ni); 844 } 845 846 /* 847 * atw_reset: 848 * 849 * Perform a soft reset on the ADM8211. 850 */ 851 void 852 atw_reset(struct atw_softc *sc) 853 { 854 int i; 855 856 ATW_WRITE(sc, ATW_PAR, ATW_PAR_SWR); 857 858 for (i = 0; i < 10000; i++) { 859 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR) == 0) 860 break; 861 DELAY(1); 862 } 863 864 DPRINTF2(sc, ("%s: atw_reset %d iterations\n", sc->sc_dev.dv_xname, i)); 865 866 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR)) 867 printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname); 868 869 /* Turn off maximum power saving. */ 870 ATW_CLR(sc, ATW_FRCTL, ATW_FRCTL_MAXPSP); 871 872 /* Recall EEPROM. */ 873 ATW_SET(sc, ATW_TEST0, ATW_TEST0_EPRLD); 874 875 DELAY(10 * 1000); 876 877 /* A reset seems to affect the SRAM contents, so put them into 878 * a known state. 879 */ 880 atw_clear_sram(sc); 881 882 memset(sc->sc_bssid, 0, sizeof(sc->sc_bssid)); 883 884 sc->sc_lost_bcn_thresh = 0; 885 } 886 887 static void 888 atw_clear_sram(struct atw_softc *sc) 889 { 890 #if 0 891 for (addr = 0; addr < 448; addr++) { 892 ATW_WRITE(sc, ATW_WEPCTL, 893 ATW_WEPCTL_WR | ATW_WEPCTL_UNKNOWN0 | addr); 894 DELAY(1000); 895 ATW_WRITE(sc, ATW_WESK, 0); 896 DELAY(1000); /* paranoia */ 897 } 898 return; 899 #endif 900 memset(sc->sc_sram, 0, sizeof(sc->sc_sram)); 901 /* XXX not for revision 0x20. */ 902 atw_write_sram(sc, 0, sc->sc_sram, sizeof(sc->sc_sram)); 903 } 904 905 /* TBD atw_init 906 * 907 * set MAC based on ic->ic_bss->myaddr 908 * write WEP keys 909 * set TX rate 910 */ 911 912 /* 913 * atw_init: [ ifnet interface function ] 914 * 915 * Initialize the interface. Must be called at splnet(). 916 */ 917 int 918 atw_init(struct ifnet *ifp) 919 { 920 struct atw_softc *sc = ifp->if_softc; 921 struct ieee80211com *ic = &sc->sc_ic; 922 struct atw_txsoft *txs; 923 struct atw_rxsoft *rxs; 924 u_int32_t reg; 925 int i, error = 0; 926 927 if ((error = atw_enable(sc)) != 0) 928 goto out; 929 930 /* 931 * Cancel any pending I/O. This also resets. 932 */ 933 atw_stop(ifp, 0); 934 935 ic->ic_bss->ni_chan = ic->ic_ibss_chan; 936 DPRINTF(sc, ("%s: channel %d freq %d flags 0x%04x\n", 937 __func__, ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan), 938 ic->ic_bss->ni_chan->ic_freq, ic->ic_bss->ni_chan->ic_flags)); 939 940 /* Turn off APM??? (A binary-only driver does this.) 941 * 942 * Set Rx store-and-forward mode. 943 */ 944 reg = ATW_READ(sc, ATW_CMDR); 945 reg &= ~ATW_CMDR_APM; 946 reg &= ~ATW_CMDR_DRT_MASK; 947 reg |= ATW_CMDR_RTE | LSHIFT(0x2, ATW_CMDR_DRT_MASK); 948 949 ATW_WRITE(sc, ATW_CMDR, reg); 950 951 /* Set data rate for PLCP Signal field, 1Mbps = 10 x 100Kb/s. 952 * 953 * XXX a binary-only driver sets a different service field than 954 * 0. why? 955 */ 956 reg = ATW_READ(sc, ATW_PLCPHD); 957 reg &= ~(ATW_PLCPHD_SERVICE_MASK|ATW_PLCPHD_SIGNAL_MASK); 958 reg |= LSHIFT(10, ATW_PLCPHD_SIGNAL_MASK) | 959 LSHIFT(0xb0, ATW_PLCPHD_SERVICE_MASK); 960 ATW_WRITE(sc, ATW_PLCPHD, reg); 961 962 /* XXX this magic can probably be figured out from the RFMD docs */ 963 reg = LSHIFT(4, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 964 LSHIFT(13, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 965 LSHIFT(8, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 966 LSHIFT(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 967 LSHIFT(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 968 LSHIFT(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 969 LSHIFT(4, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 970 LSHIFT(5, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 971 ATW_WRITE(sc, ATW_TOFS2, reg); 972 973 ATW_WRITE(sc, ATW_TXLMT, LSHIFT(512, ATW_TXLMT_MTMLT_MASK) | 974 LSHIFT(224, ATW_TXLMT_SRTYLIM_MASK)); 975 976 /* XXX this resets an Intersil RF front-end? */ 977 /* TBD condition on Intersil RFType? */ 978 ATW_WRITE(sc, ATW_SYNRF, ATW_SYNRF_INTERSIL_EN); 979 DELAY(10 * 1000); 980 ATW_WRITE(sc, ATW_SYNRF, 0); 981 DELAY(5 * 1000); 982 983 /* 16 TU max duration for contention-free period */ 984 reg = ATW_READ(sc, ATW_CFPP) & ~ATW_CFPP_CFPMD; 985 ATW_WRITE(sc, ATW_CFPP, reg | LSHIFT(16, ATW_CFPP_CFPMD)); 986 987 /* XXX I guess that the Cardbus clock is 22MHz? 988 * I am assuming that the role of ATW_TOFS0_USCNT is 989 * to divide the bus clock to get a 1MHz clock---the datasheet is not 990 * very clear on this point. It says in the datasheet that it is 991 * possible for the ADM8211 to accomodate bus speeds between 22MHz 992 * and 33MHz; maybe this is the way? I see a binary-only driver write 993 * these values. These values are also the power-on default. 994 */ 995 ATW_WRITE(sc, ATW_TOFS0, 996 LSHIFT(22, ATW_TOFS0_USCNT_MASK) | 997 ATW_TOFS0_TUCNT_MASK /* set all bits in TUCNT */); 998 999 /* Initialize interframe spacing. EIFS=0x64 is used by a binary-only 1000 * driver. Go figure. 1001 */ 1002 reg = LSHIFT(IEEE80211_DUR_DS_SLOT, ATW_IFST_SLOT_MASK) | 1003 LSHIFT(22 * IEEE80211_DUR_DS_SIFS /* # of 22MHz cycles */, 1004 ATW_IFST_SIFS_MASK) | 1005 LSHIFT(IEEE80211_DUR_DS_DIFS, ATW_IFST_DIFS_MASK) | 1006 LSHIFT(0x64 /* IEEE80211_DUR_DS_EIFS */, ATW_IFST_EIFS_MASK); 1007 1008 ATW_WRITE(sc, ATW_IFST, reg); 1009 1010 /* XXX More magic. Might relate to ACK timing. */ 1011 ATW_WRITE(sc, ATW_RSPT, LSHIFT(0xffff, ATW_RSPT_MART_MASK) | 1012 LSHIFT(0xff, ATW_RSPT_MIRT_MASK)); 1013 1014 /* Set up the MMI read/write addresses for the BBP. 1015 * 1016 * TBD find out the Marvel settings. 1017 */ 1018 switch (sc->sc_bbptype) { 1019 case ATW_BBPTYPE_INTERSIL: 1020 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_INTERSIL); 1021 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_INTERSIL); 1022 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_INTERSIL); 1023 break; 1024 case ATW_BBPTYPE_MARVEL: 1025 break; 1026 case ATW_BBPTYPE_RFMD: 1027 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_RFMD); 1028 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_RFMD); 1029 ATW_WRITE(sc, ATW_MMIRADDR2, ATW_MMIRADDR2_RFMD); 1030 default: 1031 break; 1032 } 1033 1034 sc->sc_wepctl = 0; 1035 ATW_WRITE(sc, ATW_MACTEST, ATW_MACTEST_MMI_USETXCLK); 1036 1037 if ((error = atw_rf3000_init(sc)) != 0) 1038 goto out; 1039 1040 /* 1041 * Initialize the PCI Access Register. 1042 */ 1043 sc->sc_busmode = ATW_PAR_BAR; /* XXX what is this? */ 1044 1045 /* 1046 * If we're allowed to do so, use Memory Read Line 1047 * and Memory Read Multiple. 1048 * 1049 * XXX Should we use Memory Write and Invalidate? 1050 */ 1051 if (sc->sc_flags & ATWF_MRL) 1052 sc->sc_busmode |= ATW_PAR_MRLE; 1053 if (sc->sc_flags & ATWF_MRM) 1054 sc->sc_busmode |= ATW_PAR_MRME; 1055 if (sc->sc_flags & ATWF_MWI) 1056 sc->sc_busmode |= ATW_PAR_MWIE; 1057 if (sc->sc_maxburst == 0) 1058 sc->sc_maxburst = 8; /* ADM8211 default */ 1059 1060 switch (sc->sc_cacheline) { 1061 default: 1062 /* Use burst length. */ 1063 break; 1064 case 8: 1065 sc->sc_busmode |= ATW_PAR_CAL_8DW; 1066 break; 1067 case 16: 1068 sc->sc_busmode |= ATW_PAR_CAL_16DW; 1069 break; 1070 case 32: 1071 sc->sc_busmode |= ATW_PAR_CAL_32DW; 1072 break; 1073 } 1074 switch (sc->sc_maxburst) { 1075 case 1: 1076 sc->sc_busmode |= ATW_PAR_PBL_1DW; 1077 break; 1078 case 2: 1079 sc->sc_busmode |= ATW_PAR_PBL_2DW; 1080 break; 1081 case 4: 1082 sc->sc_busmode |= ATW_PAR_PBL_4DW; 1083 break; 1084 case 8: 1085 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1086 break; 1087 case 16: 1088 sc->sc_busmode |= ATW_PAR_PBL_16DW; 1089 break; 1090 case 32: 1091 sc->sc_busmode |= ATW_PAR_PBL_32DW; 1092 break; 1093 default: 1094 sc->sc_busmode |= ATW_PAR_PBL_8DW; 1095 break; 1096 } 1097 1098 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 1099 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1100 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1101 1102 /* 1103 * Initialize the OPMODE register. We don't write it until 1104 * we're ready to begin the transmit and receive processes. 1105 */ 1106 sc->sc_opmode = ATW_NAR_SR | ATW_NAR_ST | 1107 sc->sc_txth[sc->sc_txthresh].txth_opmode; 1108 1109 /* 1110 * Initialize the transmit descriptor ring. 1111 */ 1112 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1113 for (i = 0; i < ATW_NTXDESC; i++) { 1114 /* no transmit chaining */ 1115 sc->sc_txdescs[i].at_ctl = 0 /* ATW_TXFLAG_TCH */; 1116 sc->sc_txdescs[i].at_buf2 = 1117 htole32(ATW_CDTXADDR(sc, ATW_NEXTTX(i))); 1118 } 1119 /* use ring mode */ 1120 sc->sc_txdescs[ATW_NTXDESC - 1].at_ctl |= ATW_TXFLAG_TER; 1121 ATW_CDTXSYNC(sc, 0, ATW_NTXDESC, 1122 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1123 sc->sc_txfree = ATW_NTXDESC; 1124 sc->sc_txnext = 0; 1125 1126 /* 1127 * Initialize the transmit job descriptors. 1128 */ 1129 SIMPLEQ_INIT(&sc->sc_txfreeq); 1130 SIMPLEQ_INIT(&sc->sc_txdirtyq); 1131 for (i = 0; i < ATW_TXQUEUELEN; i++) { 1132 txs = &sc->sc_txsoft[i]; 1133 txs->txs_mbuf = NULL; 1134 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1135 } 1136 1137 /* 1138 * Initialize the receive descriptor and receive job 1139 * descriptor rings. 1140 */ 1141 for (i = 0; i < ATW_NRXDESC; i++) { 1142 rxs = &sc->sc_rxsoft[i]; 1143 if (rxs->rxs_mbuf == NULL) { 1144 if ((error = atw_add_rxbuf(sc, i)) != 0) { 1145 printf("%s: unable to allocate or map rx " 1146 "buffer %d, error = %d\n", 1147 sc->sc_dev.dv_xname, i, error); 1148 /* 1149 * XXX Should attempt to run with fewer receive 1150 * XXX buffers instead of just failing. 1151 */ 1152 atw_rxdrain(sc); 1153 goto out; 1154 } 1155 } else 1156 ATW_INIT_RXDESC(sc, i); 1157 } 1158 sc->sc_rxptr = 0; 1159 1160 /* disable all wake-up events */ 1161 ATW_CLR(sc, ATW_WCSR, ATW_WCSR_WP1E|ATW_WCSR_WP2E|ATW_WCSR_WP3E| 1162 ATW_WCSR_WP4E|ATW_WCSR_WP5E|ATW_WCSR_TSFTWE| 1163 ATW_WCSR_TIMWE|ATW_WCSR_ATIMWE|ATW_WCSR_KEYWE| 1164 ATW_WCSR_WFRE|ATW_WCSR_MPRE|ATW_WCSR_LSOE); 1165 1166 /* ack all wake-up events */ 1167 ATW_SET(sc, ATW_WCSR, 0); 1168 1169 /* 1170 * Initialize the interrupt mask and enable interrupts. 1171 */ 1172 /* normal interrupts */ 1173 sc->sc_inten = ATW_INTR_TCI | ATW_INTR_TDU | ATW_INTR_RCI | 1174 ATW_INTR_NISS | ATW_INTR_LINKON | ATW_INTR_BCNTC; 1175 1176 /* abnormal interrupts */ 1177 sc->sc_inten |= ATW_INTR_TPS | ATW_INTR_TLT | ATW_INTR_TRT | 1178 ATW_INTR_TUF | ATW_INTR_RDU | ATW_INTR_RPS | ATW_INTR_AISS | 1179 ATW_INTR_FBE | ATW_INTR_LINKOFF | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1180 1181 sc->sc_linkint_mask = ATW_INTR_LINKON | ATW_INTR_LINKOFF | 1182 ATW_INTR_BCNTC | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1183 sc->sc_rxint_mask = ATW_INTR_RCI | ATW_INTR_RDU; 1184 sc->sc_txint_mask = ATW_INTR_TCI | ATW_INTR_TUF | ATW_INTR_TLT | 1185 ATW_INTR_TRT; 1186 1187 sc->sc_linkint_mask &= sc->sc_inten; 1188 sc->sc_rxint_mask &= sc->sc_inten; 1189 sc->sc_txint_mask &= sc->sc_inten; 1190 1191 ATW_WRITE(sc, ATW_IER, sc->sc_inten); 1192 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1193 if (sc->sc_intr_ack != NULL) 1194 (*sc->sc_intr_ack)(sc); 1195 1196 DPRINTF(sc, ("%s: ATW_IER %08x, inten %08x\n", 1197 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_IER), sc->sc_inten)); 1198 1199 /* 1200 * Give the transmit and receive rings to the ADM8211. 1201 */ 1202 ATW_WRITE(sc, ATW_TDBD, ATW_CDTXADDR(sc, sc->sc_txnext)); 1203 ATW_WRITE(sc, ATW_RDB, ATW_CDRXADDR(sc, sc->sc_rxptr)); 1204 1205 /* common 802.11 configuration */ 1206 ic->ic_flags &= ~IEEE80211_F_IBSSON; 1207 switch (ic->ic_opmode) { 1208 case IEEE80211_M_STA: 1209 break; 1210 case IEEE80211_M_AHDEMO: /* XXX */ 1211 case IEEE80211_M_IBSS: 1212 ic->ic_flags |= IEEE80211_F_IBSSON; 1213 /*FALLTHROUGH*/ 1214 case IEEE80211_M_HOSTAP: /* XXX */ 1215 break; 1216 case IEEE80211_M_MONITOR: /* XXX */ 1217 break; 1218 } 1219 1220 atw_start_beacon(sc, 0); 1221 1222 switch (ic->ic_opmode) { 1223 case IEEE80211_M_AHDEMO: 1224 case IEEE80211_M_HOSTAP: 1225 ic->ic_bss->ni_intval = ic->ic_lintval; 1226 ic->ic_bss->ni_rssi = 0; 1227 ic->ic_bss->ni_rstamp = 0; 1228 break; 1229 default: /* XXX */ 1230 break; 1231 } 1232 1233 atw_write_ssid(sc); 1234 atw_write_sup_rates(sc); 1235 if (ic->ic_caps & IEEE80211_C_WEP) 1236 atw_write_wep(sc); 1237 1238 /* 1239 * Set the receive filter. This will start the transmit and 1240 * receive processes. 1241 */ 1242 atw_filter_setup(sc); 1243 1244 /* 1245 * Start the receive process. 1246 */ 1247 ATW_WRITE(sc, ATW_RDR, 0x1); 1248 1249 /* 1250 * Note that the interface is now running. 1251 */ 1252 ifp->if_flags |= IFF_RUNNING; 1253 ifp->if_flags &= ~IFF_OACTIVE; 1254 ic->ic_state = IEEE80211_S_INIT; 1255 1256 if (ic->ic_opmode != IEEE80211_M_MONITOR) 1257 error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1258 else 1259 error = ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1260 out: 1261 if (error) { 1262 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1263 ifp->if_timer = 0; 1264 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1265 } 1266 #ifdef ATW_DEBUG 1267 atw_print_regs(sc, "end of init"); 1268 #endif /* ATW_DEBUG */ 1269 1270 return (error); 1271 } 1272 1273 /* enable == 1: host control of RF3000/Si4126 through ATW_SYNCTL. 1274 * 0: MAC control of RF3000/Si4126. 1275 * 1276 * Applies power, or selects RF front-end? Sets reset condition. 1277 * 1278 * TBD support non-RFMD BBP, non-SiLabs synth. 1279 */ 1280 static void 1281 atw_rfio_enable(struct atw_softc *sc, int enable) 1282 { 1283 if (enable) { 1284 ATW_WRITE(sc, ATW_SYNRF, 1285 ATW_SYNRF_SELRF|ATW_SYNRF_PE1|ATW_SYNRF_PHYRST); 1286 DELAY(atw_rfio_enable_delay); 1287 } else { 1288 ATW_WRITE(sc, ATW_SYNRF, 0); 1289 DELAY(atw_rfio_disable_delay); /* shorter for some reason */ 1290 } 1291 } 1292 1293 static int 1294 atw_tune(struct atw_softc *sc) 1295 { 1296 int rc; 1297 u_int32_t reg; 1298 int chan; 1299 struct ieee80211com *ic = &sc->sc_ic; 1300 1301 chan = ieee80211_chan2ieee(ic, ic->ic_bss->ni_chan); 1302 if (chan == IEEE80211_CHAN_ANY) 1303 panic("%s: chan == IEEE80211_CHAN_ANY\n", __func__); 1304 1305 if (chan == sc->sc_cur_chan) 1306 return 0; 1307 1308 DPRINTF(sc, ("%s: chan %d -> %d\n", sc->sc_dev.dv_xname, 1309 sc->sc_cur_chan, chan)); 1310 1311 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1312 1313 if ((rc = atw_si4126_tune(sc, chan)) != 0 || 1314 (rc = atw_rf3000_tune(sc, chan)) != 0) 1315 printf("%s: failed to tune channel %d\n", sc->sc_dev.dv_xname, 1316 chan); 1317 1318 reg = ATW_READ(sc, ATW_CAP0) & ~ATW_CAP0_CHN_MASK; 1319 ATW_WRITE(sc, ATW_CAP0, 1320 reg | LSHIFT(chan, ATW_CAP0_CHN_MASK)); 1321 1322 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1323 1324 if (rc == 0) 1325 sc->sc_cur_chan = chan; 1326 1327 return rc; 1328 } 1329 1330 #ifdef ATW_DEBUG 1331 static void 1332 atw_si4126_print(struct atw_softc *sc) 1333 { 1334 struct ifnet *ifp = &sc->sc_ic.ic_if; 1335 u_int addr, val; 1336 1337 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1338 return; 1339 1340 for (addr = 0; addr <= 8; addr++) { 1341 printf("%s: synth[%d] = ", sc->sc_dev.dv_xname, addr); 1342 if (atw_si4126_read(sc, addr, &val) == 0) { 1343 printf("<unknown> (quitting print-out)\n"); 1344 break; 1345 } 1346 printf("%05x\n", val); 1347 } 1348 } 1349 #endif /* ATW_DEBUG */ 1350 1351 /* Tune to channel chan by adjusting the Si4126 RF/IF synthesizer. 1352 * 1353 * The RF/IF synthesizer produces two reference frequencies for 1354 * the RF2948B transceiver. The first frequency the RF2948B requires 1355 * is two times the so-called "intermediate frequency" (IF). Since 1356 * a SAW filter on the radio fixes the IF at 374MHz, I program the 1357 * Si4126 to generate IF LO = 374MHz x 2 = 748MHz. The second 1358 * frequency required by the transceiver is the radio frequency 1359 * (RF). This is a superheterodyne transceiver; for f(chan) the 1360 * center frequency of the channel we are tuning, RF = f(chan) - 1361 * IF. 1362 * 1363 * XXX I am told by SiLabs that the Si4126 will accept a broader range 1364 * of XIN than the 2-25MHz mentioned by the datasheet, even *without* 1365 * XINDIV2 = 1. I've tried this (it is necessary to double R) and it 1366 * works, but I have still programmed for XINDIV2 = 1 to be safe. 1367 */ 1368 static int 1369 atw_si4126_tune(struct atw_softc *sc, u_int8_t chan) 1370 { 1371 int rc = 0; 1372 u_int mhz; 1373 u_int R; 1374 u_int32_t reg; 1375 u_int16_t gain; 1376 1377 #ifdef ATW_DEBUG 1378 atw_si4126_print(sc); 1379 #endif /* ATW_DEBUG */ 1380 1381 if (chan == 14) 1382 mhz = 2484; 1383 else 1384 mhz = 2412 + 5 * (chan - 1); 1385 1386 /* Tune IF to 748MHz to suit the IF LO input of the 1387 * RF2494B, which is 2 x IF. No need to set an IF divider 1388 * because an IF in 526MHz - 952MHz is allowed. 1389 * 1390 * XIN is 44.000MHz, so divide it by two to get allowable 1391 * range of 2-25MHz. SiLabs tells me that this is not 1392 * strictly necessary. 1393 */ 1394 1395 R = 44; 1396 1397 atw_rfio_enable(sc, 1); 1398 1399 /* Power-up RF, IF synthesizers. */ 1400 if ((rc = atw_si4126_write(sc, SI4126_POWER, 1401 SI4126_POWER_PDIB|SI4126_POWER_PDRB)) != 0) 1402 goto out; 1403 1404 /* If RF2 N > 2047, then set KP2 to 1. */ 1405 gain = LSHIFT(((mhz - 374) > 2047) ? 1 : 0, SI4126_GAIN_KP2_MASK); 1406 1407 if ((rc = atw_si4126_write(sc, SI4126_GAIN, gain)) != 0) 1408 goto out; 1409 1410 /* set LPWR, too? */ 1411 if ((rc = atw_si4126_write(sc, SI4126_MAIN, 1412 SI4126_MAIN_XINDIV2)) != 0) 1413 goto out; 1414 1415 /* We set XINDIV2 = 1, so IF = N/(2 * R) * XIN. XIN = 44MHz. 1416 * I choose N = 1496, R = 44 so that 1496/(2 * 44) * 44MHz = 748MHz. 1417 */ 1418 if ((rc = atw_si4126_write(sc, SI4126_IFN, 1496)) != 0) 1419 goto out; 1420 1421 if ((rc = atw_si4126_write(sc, SI4126_IFR, R)) != 0) 1422 goto out; 1423 1424 /* Set RF1 arbitrarily. DO NOT configure RF1 after RF2, because 1425 * then RF1 becomes the active RF synthesizer, even on the Si4126, 1426 * which has no RF1! 1427 */ 1428 if ((rc = atw_si4126_write(sc, SI4126_RF1R, R)) != 0) 1429 goto out; 1430 1431 if ((rc = atw_si4126_write(sc, SI4126_RF1N, mhz - 374)) != 0) 1432 goto out; 1433 1434 /* N/R * XIN = RF. XIN = 44MHz. We desire RF = mhz - IF, 1435 * where IF = 374MHz. Let's divide XIN to 1MHz. So R = 44. 1436 * Now let's multiply it to mhz. So mhz - IF = N. 1437 */ 1438 if ((rc = atw_si4126_write(sc, SI4126_RF2R, R)) != 0) 1439 goto out; 1440 1441 if ((rc = atw_si4126_write(sc, SI4126_RF2N, mhz - 374)) != 0) 1442 goto out; 1443 1444 /* wait 100us from power-up for RF, IF to settle */ 1445 DELAY(100); 1446 1447 if ((sc->sc_if.if_flags & IFF_LINK1) == 0 || chan == 14) { 1448 /* XXX there is a binary driver which sends 1449 * ATW_GPIO_EN_MASK = 1, ATW_GPIO_O_MASK = 1. I had speculated 1450 * that this enables the Si4126 by raising its PWDN#, but I 1451 * think that it actually sets the Prism RF front-end 1452 * to a special mode for channel 14. 1453 */ 1454 reg = ATW_READ(sc, ATW_GPIO); 1455 reg &= ~(ATW_GPIO_EN_MASK|ATW_GPIO_O_MASK|ATW_GPIO_I_MASK); 1456 reg |= LSHIFT(1, ATW_GPIO_EN_MASK) | LSHIFT(1, ATW_GPIO_O_MASK); 1457 ATW_WRITE(sc, ATW_GPIO, reg); 1458 } 1459 1460 #ifdef ATW_DEBUG 1461 atw_si4126_print(sc); 1462 #endif /* ATW_DEBUG */ 1463 1464 out: 1465 atw_rfio_enable(sc, 0); 1466 1467 return rc; 1468 } 1469 1470 /* Baseline initialization of RF3000 BBP: set CCA mode and enable antenna 1471 * diversity. 1472 * 1473 * Call this w/ Tx/Rx suspended. 1474 */ 1475 static int 1476 atw_rf3000_init(struct atw_softc *sc) 1477 { 1478 int rc = 0; 1479 1480 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1481 1482 atw_rfio_enable(sc, 1); 1483 1484 /* enable diversity */ 1485 rc = atw_rf3000_write(sc, RF3000_DIVCTL, RF3000_DIVCTL_ENABLE); 1486 1487 if (rc != 0) 1488 goto out; 1489 1490 /* sensible setting from a binary-only driver */ 1491 rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1492 LSHIFT(0x1d, RF3000_GAINCTL_TXVGC_MASK)); 1493 1494 if (rc != 0) 1495 goto out; 1496 1497 /* magic from a binary-only driver */ 1498 rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, 1499 LSHIFT(0x38, RF3000_LOGAINCAL_CAL_MASK)); 1500 1501 if (rc != 0) 1502 goto out; 1503 1504 rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, RF3000_HIGAINCAL_DSSSPAD); 1505 1506 if (rc != 0) 1507 goto out; 1508 1509 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, 0x0); 1510 1511 if (rc != 0) 1512 goto out; 1513 1514 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, RF3000_OPTIONS2_LNAGS_DELAY); 1515 1516 if (rc != 0) 1517 goto out; 1518 1519 /* CCA is acquisition sensitive */ 1520 rc = atw_rf3000_write(sc, RF3000_CCACTL, 1521 LSHIFT(RF3000_CCACTL_MODE_ACQ, RF3000_CCACTL_MODE_MASK)); 1522 1523 if (rc != 0) 1524 goto out; 1525 1526 out: 1527 atw_rfio_enable(sc, 0); 1528 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1529 return rc; 1530 } 1531 1532 #ifdef ATW_DEBUG 1533 static void 1534 atw_rf3000_print(struct atw_softc *sc) 1535 { 1536 struct ifnet *ifp = &sc->sc_ic.ic_if; 1537 u_int addr, val; 1538 1539 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1540 return; 1541 1542 for (addr = 0x01; addr <= 0x15; addr++) { 1543 printf("%s: bbp[%d] = \n", sc->sc_dev.dv_xname, addr); 1544 if (atw_rf3000_read(sc, addr, &val) != 0) { 1545 printf("<unknown> (quitting print-out)\n"); 1546 break; 1547 } 1548 printf("%08x\n", val); 1549 } 1550 } 1551 #endif /* ATW_DEBUG */ 1552 1553 /* Set the power settings on the BBP for channel `chan'. */ 1554 static int 1555 atw_rf3000_tune(struct atw_softc *sc, u_int8_t chan) 1556 { 1557 int rc = 0; 1558 u_int32_t reg; 1559 u_int16_t txpower, lpf_cutoff, lna_gs_thresh; 1560 1561 txpower = sc->sc_srom[ATW_SR_TXPOWER(chan)]; 1562 lpf_cutoff = sc->sc_srom[ATW_SR_LPF_CUTOFF(chan)]; 1563 lna_gs_thresh = sc->sc_srom[ATW_SR_LNA_GS_THRESH(chan)]; 1564 1565 /* odd channels: LSB, even channels: MSB */ 1566 if (chan % 2 == 1) { 1567 txpower &= 0xFF; 1568 lpf_cutoff &= 0xFF; 1569 lna_gs_thresh &= 0xFF; 1570 } else { 1571 txpower >>= 8; 1572 lpf_cutoff >>= 8; 1573 lna_gs_thresh >>= 8; 1574 } 1575 1576 #ifdef ATW_DEBUG 1577 atw_rf3000_print(sc); 1578 #endif /* ATW_DEBUG */ 1579 1580 DPRINTF(sc, ("%s: chan %d txpower %02x, lpf_cutoff %02x, " 1581 "lna_gs_thresh %02x\n", 1582 sc->sc_dev.dv_xname, chan, txpower, lpf_cutoff, lna_gs_thresh)); 1583 1584 atw_rfio_enable(sc, 1); 1585 1586 if ((rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1587 LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK))) != 0) 1588 goto out; 1589 1590 if ((rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, lpf_cutoff)) != 0) 1591 goto out; 1592 1593 if ((rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, lna_gs_thresh)) != 0) 1594 goto out; 1595 1596 /* from a binary-only driver. */ 1597 reg = ATW_READ(sc, ATW_PLCPHD); 1598 reg &= ~ATW_PLCPHD_SERVICE_MASK; 1599 reg |= LSHIFT(LSHIFT(txpower, RF3000_GAINCTL_TXVGC_MASK), 1600 ATW_PLCPHD_SERVICE_MASK); 1601 ATW_WRITE(sc, ATW_PLCPHD, reg); 1602 1603 #ifdef ATW_DEBUG 1604 atw_rf3000_print(sc); 1605 #endif /* ATW_DEBUG */ 1606 1607 out: 1608 atw_rfio_enable(sc, 0); 1609 1610 return rc; 1611 } 1612 1613 /* Write a register on the RF3000 baseband processor using the 1614 * registers provided by the ADM8211 for this purpose. 1615 * 1616 * Return 0 on success. 1617 */ 1618 static int 1619 atw_rf3000_write(struct atw_softc *sc, u_int addr, u_int val) 1620 { 1621 u_int32_t reg; 1622 int i; 1623 1624 for (i = 1000; --i >= 0; ) { 1625 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1626 break; 1627 DELAY(100); 1628 } 1629 1630 if (i < 0) { 1631 printf("%s: BBPCTL busy (pre-write)\n", sc->sc_dev.dv_xname); 1632 return ETIMEDOUT; 1633 } 1634 1635 reg = sc->sc_bbpctl_wr | 1636 LSHIFT(val & 0xff, ATW_BBPCTL_DATA_MASK) | 1637 LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1638 1639 ATW_WRITE(sc, ATW_BBPCTL, reg); 1640 1641 for (i = 1000; --i >= 0; ) { 1642 DELAY(100); 1643 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_WR) == 0) 1644 break; 1645 } 1646 1647 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_WR); 1648 1649 if (i < 0) { 1650 printf("%s: BBPCTL busy (post-write)\n", sc->sc_dev.dv_xname); 1651 return ETIMEDOUT; 1652 } 1653 return 0; 1654 } 1655 1656 /* Read a register on the RF3000 baseband processor using the registers 1657 * the ADM8211 provides for this purpose. 1658 * 1659 * The 7-bit register address is addr. Record the 8-bit data in the register 1660 * in *val. 1661 * 1662 * Return 0 on success. 1663 * 1664 * XXX This does not seem to work. The ADM8211 must require more or 1665 * different magic to read the chip than to write it. Possibly some 1666 * of the magic I have derived from a binary-only driver concerns 1667 * the "chip address" (see the RF3000 manual). 1668 */ 1669 #ifdef ATW_DEBUG 1670 static int 1671 atw_rf3000_read(struct atw_softc *sc, u_int addr, u_int *val) 1672 { 1673 u_int32_t reg; 1674 int i; 1675 1676 for (i = 1000; --i >= 0; ) { 1677 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1678 break; 1679 DELAY(100); 1680 } 1681 1682 if (i < 0) { 1683 printf("%s: start atw_rf3000_read, BBPCTL busy\n", 1684 sc->sc_dev.dv_xname); 1685 return ETIMEDOUT; 1686 } 1687 1688 reg = sc->sc_bbpctl_rd | LSHIFT(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1689 1690 ATW_WRITE(sc, ATW_BBPCTL, reg); 1691 1692 for (i = 1000; --i >= 0; ) { 1693 DELAY(100); 1694 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD) == 0) 1695 break; 1696 } 1697 1698 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_RD); 1699 1700 if (i < 0) { 1701 printf("%s: atw_rf3000_read wrote %08x; BBPCTL still busy\n", 1702 sc->sc_dev.dv_xname, reg); 1703 return ETIMEDOUT; 1704 } 1705 if (val != NULL) 1706 *val = MASK_AND_RSHIFT(reg, ATW_BBPCTL_DATA_MASK); 1707 return 0; 1708 } 1709 #endif /* ATW_DEBUG */ 1710 1711 /* Write a register on the Si4126 RF/IF synthesizer using the registers 1712 * provided by the ADM8211 for that purpose. 1713 * 1714 * val is 18 bits of data, and val is the 4-bit address of the register. 1715 * 1716 * Return 0 on success. 1717 */ 1718 static int 1719 atw_si4126_write(struct atw_softc *sc, u_int addr, u_int val) 1720 { 1721 u_int32_t bits, reg; 1722 int i; 1723 1724 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1725 KASSERT((val & ~PRESHIFT(SI4126_TWI_DATA_MASK)) == 0); 1726 1727 for (i = 1000; --i >= 0; ) { 1728 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1729 break; 1730 DELAY(100); 1731 } 1732 1733 if (i < 0) { 1734 printf("%s: start atw_si4126_write, SYNCTL busy\n", 1735 sc->sc_dev.dv_xname); 1736 return ETIMEDOUT; 1737 } 1738 1739 bits = LSHIFT(val, SI4126_TWI_DATA_MASK) | 1740 LSHIFT(addr, SI4126_TWI_ADDR_MASK); 1741 1742 reg = sc->sc_synctl_wr | LSHIFT(bits, ATW_SYNCTL_DATA_MASK); 1743 1744 ATW_WRITE(sc, ATW_SYNCTL, reg); 1745 1746 for (i = 1000; --i >= 0; ) { 1747 DELAY(100); 1748 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_WR) == 0) 1749 break; 1750 } 1751 1752 /* restore to acceptable starting condition */ 1753 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_WR); 1754 1755 if (i < 0) { 1756 printf("%s: atw_si4126_write wrote %08x, SYNCTL still busy\n", 1757 sc->sc_dev.dv_xname, reg); 1758 return ETIMEDOUT; 1759 } 1760 return 0; 1761 } 1762 1763 /* Read 18-bit data from the 4-bit address addr in Si4126 1764 * RF synthesizer and write the data to *val. Return 0 on success. 1765 * 1766 * XXX This does not seem to work. The ADM8211 must require more or 1767 * different magic to read the chip than to write it. 1768 */ 1769 #ifdef ATW_DEBUG 1770 static int 1771 atw_si4126_read(struct atw_softc *sc, u_int addr, u_int *val) 1772 { 1773 u_int32_t reg; 1774 int i; 1775 1776 KASSERT((addr & ~PRESHIFT(SI4126_TWI_ADDR_MASK)) == 0); 1777 1778 for (i = 1000; --i >= 0; ) { 1779 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1780 break; 1781 DELAY(100); 1782 } 1783 1784 if (i < 0) { 1785 printf("%s: start atw_si4126_read, SYNCTL busy\n", 1786 sc->sc_dev.dv_xname); 1787 return ETIMEDOUT; 1788 } 1789 1790 reg = sc->sc_synctl_rd | LSHIFT(addr, ATW_SYNCTL_DATA_MASK); 1791 1792 ATW_WRITE(sc, ATW_SYNCTL, reg); 1793 1794 for (i = 1000; --i >= 0; ) { 1795 DELAY(100); 1796 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0) 1797 break; 1798 } 1799 1800 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD); 1801 1802 if (i < 0) { 1803 printf("%s: atw_si4126_read wrote %08x, SYNCTL still busy\n", 1804 sc->sc_dev.dv_xname, reg); 1805 return ETIMEDOUT; 1806 } 1807 if (val != NULL) 1808 *val = MASK_AND_RSHIFT(ATW_READ(sc, ATW_SYNCTL), 1809 ATW_SYNCTL_DATA_MASK); 1810 return 0; 1811 } 1812 #endif /* ATW_DEBUG */ 1813 1814 /* XXX is the endianness correct? test. */ 1815 #define atw_calchash(addr) \ 1816 (ether_crc32_le((addr), IEEE80211_ADDR_LEN) & BITS(5, 0)) 1817 1818 /* 1819 * atw_filter_setup: 1820 * 1821 * Set the ADM8211's receive filter. 1822 */ 1823 static void 1824 atw_filter_setup(struct atw_softc *sc) 1825 { 1826 struct ieee80211com *ic = &sc->sc_ic; 1827 struct ethercom *ec = &ic->ic_ec; 1828 struct ifnet *ifp = &sc->sc_ic.ic_if; 1829 int hash; 1830 u_int32_t hashes[2] = { 0, 0 }; 1831 struct ether_multi *enm; 1832 struct ether_multistep step; 1833 1834 DPRINTF(sc, ("%s: atw_filter_setup: sc_flags 0x%08x\n", 1835 sc->sc_dev.dv_xname, sc->sc_flags)); 1836 1837 /* 1838 * If we're running, idle the receive engine. If we're NOT running, 1839 * we're being called from atw_init(), and our writing ATW_NAR will 1840 * start the transmit and receive processes in motion. 1841 */ 1842 if (ifp->if_flags & IFF_RUNNING) 1843 atw_idle(sc, ATW_NAR_SR); 1844 1845 sc->sc_opmode &= ~(ATW_NAR_PR|ATW_NAR_MM); 1846 1847 ifp->if_flags &= ~IFF_ALLMULTI; 1848 1849 if (ifp->if_flags & IFF_PROMISC) { 1850 sc->sc_opmode |= ATW_NAR_PR; 1851 allmulti: 1852 ifp->if_flags |= IFF_ALLMULTI; 1853 goto setit; 1854 } 1855 1856 /* 1857 * Program the 64-bit multicast hash filter. 1858 */ 1859 ETHER_FIRST_MULTI(step, ec, enm); 1860 while (enm != NULL) { 1861 /* XXX */ 1862 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 1863 ETHER_ADDR_LEN) != 0) 1864 goto allmulti; 1865 1866 hash = atw_calchash(enm->enm_addrlo); 1867 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1868 ETHER_NEXT_MULTI(step, enm); 1869 } 1870 1871 if (ifp->if_flags & IFF_BROADCAST) { 1872 hash = atw_calchash(etherbroadcastaddr); 1873 hashes[hash >> 5] |= 1 << (hash & 0x1f); 1874 } 1875 1876 /* all bits set => hash is useless */ 1877 if (~(hashes[0] & hashes[1]) == 0) 1878 goto allmulti; 1879 1880 setit: 1881 if (ifp->if_flags & IFF_ALLMULTI) 1882 sc->sc_opmode |= ATW_NAR_MM; 1883 1884 /* XXX in scan mode, do not filter packets. maybe this is 1885 * unnecessary. 1886 */ 1887 if (ic->ic_state == IEEE80211_S_SCAN) 1888 sc->sc_opmode |= ATW_NAR_PR; 1889 1890 ATW_WRITE(sc, ATW_MAR0, hashes[0]); 1891 ATW_WRITE(sc, ATW_MAR1, hashes[1]); 1892 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1893 DPRINTF(sc, ("%s: ATW_NAR %08x opmode %08x\n", sc->sc_dev.dv_xname, 1894 ATW_READ(sc, ATW_NAR), sc->sc_opmode)); 1895 1896 DPRINTF(sc, ("%s: atw_filter_setup: returning\n", sc->sc_dev.dv_xname)); 1897 } 1898 1899 /* Tell the ADM8211 our preferred BSSID. The ADM8211 must match 1900 * a beacon's BSSID and SSID against the preferred BSSID and SSID 1901 * before it will raise ATW_INTR_LINKON. When the ADM8211 receives 1902 * no beacon with the preferred BSSID and SSID in the number of 1903 * beacon intervals given in ATW_BPLI, then it raises ATW_INTR_LINKOFF. 1904 */ 1905 static void 1906 atw_write_bssid(struct atw_softc *sc) 1907 { 1908 struct ieee80211com *ic = &sc->sc_ic; 1909 u_int8_t *bssid; 1910 1911 bssid = ic->ic_bss->ni_bssid; 1912 1913 ATW_WRITE(sc, ATW_ABDA1, 1914 (ATW_READ(sc, ATW_ABDA1) & 1915 ~(ATW_ABDA1_BSSIDB4_MASK|ATW_ABDA1_BSSIDB5_MASK)) | 1916 LSHIFT(bssid[4], ATW_ABDA1_BSSIDB4_MASK) | 1917 LSHIFT(bssid[5], ATW_ABDA1_BSSIDB5_MASK)); 1918 1919 ATW_WRITE(sc, ATW_BSSID0, 1920 LSHIFT(bssid[0], ATW_BSSID0_BSSIDB0_MASK) | 1921 LSHIFT(bssid[1], ATW_BSSID0_BSSIDB1_MASK) | 1922 LSHIFT(bssid[2], ATW_BSSID0_BSSIDB2_MASK) | 1923 LSHIFT(bssid[3], ATW_BSSID0_BSSIDB3_MASK)); 1924 1925 DPRINTF(sc, ("%s: BSSID %s -> ", sc->sc_dev.dv_xname, 1926 ether_sprintf(sc->sc_bssid))); 1927 DPRINTF(sc, ("%s\n", ether_sprintf(bssid))); 1928 1929 memcpy(sc->sc_bssid, bssid, sizeof(sc->sc_bssid)); 1930 } 1931 1932 /* Tell the ADM8211 how many beacon intervals must pass without 1933 * receiving a beacon with the preferred BSSID & SSID set by 1934 * atw_write_bssid and atw_write_ssid before ATW_INTR_LINKOFF 1935 * raised. 1936 */ 1937 static void 1938 atw_write_bcn_thresh(struct atw_softc *sc) 1939 { 1940 struct ieee80211com *ic = &sc->sc_ic; 1941 int lost_bcn_thresh; 1942 1943 /* Lose link after one second or 7 beacons, whichever comes 1944 * first, but do not lose link before 2 beacons are lost. 1945 * 1946 * In host AP mode, set the lost-beacon threshold to 0. 1947 */ 1948 if (ic->ic_opmode == IEEE80211_M_HOSTAP) 1949 lost_bcn_thresh = 0; 1950 else { 1951 int beacons_per_second = 1952 1000000 / (IEEE80211_DUR_TU * MAX(1,ic->ic_bss->ni_intval)); 1953 lost_bcn_thresh = MAX(2, MIN(7, beacons_per_second)); 1954 } 1955 1956 /* XXX resets wake-up status bits */ 1957 ATW_WRITE(sc, ATW_WCSR, 1958 (ATW_READ(sc, ATW_WCSR) & ~ATW_WCSR_BLN_MASK) | 1959 (LSHIFT(lost_bcn_thresh, ATW_WCSR_BLN_MASK) & ATW_WCSR_BLN_MASK)); 1960 1961 DPRINTF(sc, ("%s: lost-beacon threshold %d -> %d\n", 1962 sc->sc_dev.dv_xname, sc->sc_lost_bcn_thresh, lost_bcn_thresh)); 1963 1964 sc->sc_lost_bcn_thresh = lost_bcn_thresh; 1965 1966 DPRINTF(sc, ("%s: atw_write_bcn_thresh reg[WCSR] = %08x\n", 1967 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_WCSR))); 1968 } 1969 1970 /* Write buflen bytes from buf to SRAM starting at the SRAM's ofs'th 1971 * 16-bit word. 1972 */ 1973 static void 1974 atw_write_sram(struct atw_softc *sc, u_int ofs, u_int8_t *buf, u_int buflen) 1975 { 1976 u_int i; 1977 u_int8_t *ptr; 1978 1979 memcpy(&sc->sc_sram[ofs], buf, buflen); 1980 1981 if (ofs % 2 != 0) { 1982 ofs--; 1983 buflen++; 1984 } 1985 1986 if (buflen % 2 != 0) 1987 buflen++; 1988 1989 assert(buflen + ofs <= ATW_SRAM_SIZE); 1990 1991 ptr = &sc->sc_sram[ofs]; 1992 1993 for (i = 0; i < buflen; i += 2) { 1994 ATW_WRITE(sc, ATW_WEPCTL, ATW_WEPCTL_WR | 1995 LSHIFT((ofs + i) / 2, ATW_WEPCTL_TBLADD_MASK)); 1996 DELAY(atw_writewep_delay); 1997 1998 ATW_WRITE(sc, ATW_WESK, 1999 LSHIFT((ptr[i + 1] << 8) | ptr[i], ATW_WESK_DATA_MASK)); 2000 DELAY(atw_writewep_delay); 2001 } 2002 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); /* restore WEP condition */ 2003 2004 if (sc->sc_if.if_flags & IFF_DEBUG) { 2005 int n_octets = 0; 2006 printf("%s: wrote %d bytes at 0x%x wepctl 0x%08x\n", 2007 sc->sc_dev.dv_xname, buflen, ofs, sc->sc_wepctl); 2008 for (i = 0; i < buflen; i++) { 2009 printf(" %02x", ptr[i]); 2010 if (++n_octets % 24 == 0) 2011 printf("\n"); 2012 } 2013 if (n_octets % 24 != 0) 2014 printf("\n"); 2015 } 2016 } 2017 2018 /* Write WEP keys from the ieee80211com to the ADM8211's SRAM. */ 2019 static void 2020 atw_write_wep(struct atw_softc *sc) 2021 { 2022 struct ieee80211com *ic = &sc->sc_ic; 2023 /* SRAM shared-key record format: key0 flags key1 ... key12 */ 2024 u_int8_t buf[IEEE80211_WEP_NKID] 2025 [1 /* key[0] */ + 1 /* flags */ + 12 /* key[1 .. 12] */]; 2026 u_int32_t reg; 2027 int i; 2028 2029 sc->sc_wepctl = 0; 2030 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); 2031 2032 if ((ic->ic_flags & IEEE80211_F_WEPON) == 0) 2033 return; 2034 2035 memset(&buf[0][0], 0, sizeof(buf)); 2036 2037 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 2038 if (ic->ic_nw_keys[i].wk_len > 5) { 2039 buf[i][1] = ATW_WEP_ENABLED | ATW_WEP_104BIT; 2040 } else if (ic->ic_nw_keys[i].wk_len != 0) { 2041 buf[i][1] = ATW_WEP_ENABLED; 2042 } else { 2043 buf[i][1] = 0; 2044 continue; 2045 } 2046 buf[i][0] = ic->ic_nw_keys[i].wk_key[0]; 2047 memcpy(&buf[i][2], &ic->ic_nw_keys[i].wk_key[1], 2048 ic->ic_nw_keys[i].wk_len - 1); 2049 } 2050 2051 reg = ATW_READ(sc, ATW_MACTEST); 2052 reg |= ATW_MACTEST_MMI_USETXCLK | ATW_MACTEST_FORCE_KEYID; 2053 reg &= ~ATW_MACTEST_KEYID_MASK; 2054 reg |= LSHIFT(ic->ic_wep_txkey, ATW_MACTEST_KEYID_MASK); 2055 ATW_WRITE(sc, ATW_MACTEST, reg); 2056 2057 /* RX bypass WEP if revision != 0x20. (I assume revision != 0x20 2058 * throughout.) 2059 */ 2060 sc->sc_wepctl = ATW_WEPCTL_WEPENABLE | ATW_WEPCTL_WEPRXBYP; 2061 if (sc->sc_if.if_flags & IFF_LINK2) 2062 sc->sc_wepctl &= ~ATW_WEPCTL_WEPRXBYP; 2063 2064 atw_write_sram(sc, ATW_SRAM_ADDR_SHARED_KEY, (u_int8_t*)&buf[0][0], 2065 sizeof(buf)); 2066 } 2067 2068 const struct timeval atw_beacon_mininterval = {1, 0}; /* 1s */ 2069 2070 static void 2071 atw_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2072 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2073 { 2074 struct atw_softc *sc = (struct atw_softc*)ic->ic_softc; 2075 2076 switch (subtype) { 2077 case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 2078 /* do nothing: hardware answers probe request */ 2079 break; 2080 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2081 case IEEE80211_FC0_SUBTYPE_BEACON: 2082 atw_recv_beacon(ic, m, ni, subtype, rssi, rstamp); 2083 break; 2084 default: 2085 (*sc->sc_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 2086 break; 2087 } 2088 return; 2089 } 2090 2091 /* In ad hoc mode, atw_recv_beacon is responsible for the coalescence 2092 * of IBSSs with like SSID/channel but different BSSID. It joins the 2093 * oldest IBSS (i.e., with greatest TSF time), since that is the WECA 2094 * convention. Possibly the ADMtek chip does this for us; I will have 2095 * to test to find out. 2096 * 2097 * XXX we should add the duration field of the received beacon to 2098 * the TSF time it contains before comparing it with the ADM8211's 2099 * TSF. 2100 */ 2101 static void 2102 atw_recv_beacon(struct ieee80211com *ic, struct mbuf *m0, 2103 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2104 { 2105 struct atw_softc *sc; 2106 struct ieee80211_frame *wh; 2107 u_int64_t tsft, bcn_tsft; 2108 u_int32_t tsftl, tsfth; 2109 int do_print = 0; 2110 2111 sc = (struct atw_softc*)ic->ic_if.if_softc; 2112 2113 if (ic->ic_if.if_flags & IFF_DEBUG) 2114 do_print = (ic->ic_if.if_flags & IFF_LINK0) 2115 ? 1 : ratecheck(&sc->sc_last_beacon, 2116 &atw_beacon_mininterval); 2117 2118 wh = mtod(m0, struct ieee80211_frame *); 2119 2120 (*sc->sc_recv_mgmt)(ic, m0, ni, subtype, rssi, rstamp); 2121 2122 if (ic->ic_state != IEEE80211_S_RUN) { 2123 if (do_print) 2124 printf("%s: atw_recv_beacon: not running\n", 2125 sc->sc_dev.dv_xname); 2126 return; 2127 } 2128 2129 if ((ni = ieee80211_lookup_node(ic, wh->i_addr2, 2130 ic->ic_bss->ni_chan)) == NULL) { 2131 if (do_print) 2132 printf("%s: atw_recv_beacon: no node %s\n", 2133 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2134 return; 2135 } 2136 2137 if (ieee80211_match_bss(ic, ni) != 0) { 2138 if (do_print) 2139 printf("%s: atw_recv_beacon: ssid mismatch %s\n", 2140 sc->sc_dev.dv_xname, ether_sprintf(wh->i_addr2)); 2141 return; 2142 } 2143 2144 if (memcmp(ni->ni_bssid, ic->ic_bss->ni_bssid, IEEE80211_ADDR_LEN) == 0) 2145 return; 2146 2147 if (do_print) 2148 printf("%s: atw_recv_beacon: bssid mismatch %s\n", 2149 sc->sc_dev.dv_xname, ether_sprintf(ni->ni_bssid)); 2150 2151 if (ic->ic_opmode != IEEE80211_M_IBSS) 2152 return; 2153 2154 /* If we read TSFTL right before rollover, we read a TSF timer 2155 * that is too high rather than too low. This prevents a spurious 2156 * synchronization down the line, however, our IBSS could suffer 2157 * from a creeping TSF.... 2158 */ 2159 tsftl = ATW_READ(sc, ATW_TSFTL); 2160 tsfth = ATW_READ(sc, ATW_TSFTH); 2161 2162 tsft = (u_int64_t)tsfth << 32 | tsftl; 2163 bcn_tsft = le64toh(*(u_int64_t*)ni->ni_tstamp); 2164 2165 if (do_print) 2166 printf("%s: my tsft %" PRIu64 " beacon tsft %" PRIu64 "\n", 2167 sc->sc_dev.dv_xname, tsft, bcn_tsft); 2168 2169 /* we are faster, let the other guy catch up */ 2170 if (bcn_tsft < tsft) 2171 return; 2172 2173 if (do_print) 2174 printf("%s: sync TSF with %s\n", sc->sc_dev.dv_xname, 2175 ether_sprintf(wh->i_addr2)); 2176 2177 ic->ic_flags &= ~IEEE80211_F_SIBSS; 2178 2179 #if 0 2180 atw_tsf(sc); 2181 #endif 2182 2183 /* negotiate rates with new IBSS */ 2184 ieee80211_fix_rate(ic, ni, IEEE80211_F_DOFRATE | 2185 IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 2186 if (ni->ni_rates.rs_nrates == 0) { 2187 printf("%s: rates mismatch, BSSID %s\n", sc->sc_dev.dv_xname, 2188 ether_sprintf(ni->ni_bssid)); 2189 return; 2190 } 2191 2192 if (do_print) { 2193 printf("%s: sync BSSID %s -> ", sc->sc_dev.dv_xname, 2194 ether_sprintf(ic->ic_bss->ni_bssid)); 2195 printf("%s ", ether_sprintf(ni->ni_bssid)); 2196 printf("(from %s)\n", ether_sprintf(wh->i_addr2)); 2197 } 2198 2199 (*ic->ic_node_copy)(ic, ic->ic_bss, ni); 2200 2201 atw_write_bssid(sc); 2202 atw_write_bcn_thresh(sc); 2203 atw_start_beacon(sc, 1); 2204 } 2205 2206 /* Write the SSID in the ieee80211com to the SRAM on the ADM8211. 2207 * In ad hoc mode, the SSID is written to the beacons sent by the 2208 * ADM8211. In both ad hoc and infrastructure mode, beacons received 2209 * with matching SSID affect ATW_INTR_LINKON/ATW_INTR_LINKOFF 2210 * indications. 2211 */ 2212 static void 2213 atw_write_ssid(struct atw_softc *sc) 2214 { 2215 struct ieee80211com *ic = &sc->sc_ic; 2216 /* 34 bytes are reserved in ADM8211 SRAM for the SSID */ 2217 u_int8_t buf[roundup(1 /* length */ + IEEE80211_NWID_LEN, 2)]; 2218 2219 memset(buf, 0, sizeof(buf)); 2220 buf[0] = ic->ic_bss->ni_esslen; 2221 memcpy(&buf[1], ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen); 2222 2223 atw_write_sram(sc, ATW_SRAM_ADDR_SSID, buf, sizeof(buf)); 2224 } 2225 2226 /* Write the supported rates in the ieee80211com to the SRAM of the ADM8211. 2227 * In ad hoc mode, the supported rates are written to beacons sent by the 2228 * ADM8211. 2229 */ 2230 static void 2231 atw_write_sup_rates(struct atw_softc *sc) 2232 { 2233 struct ieee80211com *ic = &sc->sc_ic; 2234 /* 14 bytes are probably (XXX) reserved in the ADM8211 SRAM for 2235 * supported rates 2236 */ 2237 u_int8_t buf[roundup(1 /* length */ + IEEE80211_RATE_SIZE, 2)]; 2238 2239 memset(buf, 0, sizeof(buf)); 2240 2241 buf[0] = ic->ic_bss->ni_rates.rs_nrates; 2242 2243 memcpy(&buf[1], ic->ic_bss->ni_rates.rs_rates, 2244 ic->ic_bss->ni_rates.rs_nrates); 2245 2246 atw_write_sram(sc, ATW_SRAM_ADDR_SUPRATES, buf, sizeof(buf)); 2247 } 2248 2249 /* Start/stop sending beacons. */ 2250 void 2251 atw_start_beacon(struct atw_softc *sc, int start) 2252 { 2253 struct ieee80211com *ic = &sc->sc_ic; 2254 u_int32_t len, capinfo, reg_bcnt, reg_cap1; 2255 2256 if (ATW_IS_ENABLED(sc) == 0) 2257 return; 2258 2259 len = capinfo = 0; 2260 2261 /* start beacons */ 2262 len = sizeof(struct ieee80211_frame) + 2263 8 /* timestamp */ + 2 /* beacon interval */ + 2264 2 /* capability info */ + 2265 2 + ic->ic_bss->ni_esslen /* SSID element */ + 2266 2 + ic->ic_bss->ni_rates.rs_nrates /* rates element */ + 2267 3 /* DS parameters */ + 2268 IEEE80211_CRC_LEN; 2269 2270 reg_bcnt = ATW_READ(sc, ATW_BCNT) & ~ATW_BCNT_BCNT_MASK; 2271 2272 reg_cap1 = ATW_READ(sc, ATW_CAP1) & ~ATW_CAP1_CAPI_MASK; 2273 2274 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2275 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2276 2277 if (!start) 2278 return; 2279 2280 /* TBD use ni_capinfo */ 2281 2282 if (sc->sc_flags & ATWF_SHORT_PREAMBLE) 2283 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2284 if (ic->ic_flags & IEEE80211_F_WEPON) 2285 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2286 2287 switch (ic->ic_opmode) { 2288 case IEEE80211_M_IBSS: 2289 len += 4; /* IBSS parameters */ 2290 capinfo |= IEEE80211_CAPINFO_IBSS; 2291 break; 2292 case IEEE80211_M_HOSTAP: 2293 /* XXX 6-byte minimum TIM */ 2294 len += atw_beacon_len_adjust; 2295 capinfo |= IEEE80211_CAPINFO_ESS; 2296 break; 2297 default: 2298 return; 2299 } 2300 2301 reg_bcnt |= LSHIFT(len, ATW_BCNT_BCNT_MASK); 2302 reg_cap1 |= LSHIFT(capinfo, ATW_CAP1_CAPI_MASK); 2303 2304 ATW_WRITE(sc, ATW_BCNT, reg_bcnt); 2305 ATW_WRITE(sc, ATW_CAP1, reg_cap1); 2306 2307 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_BCNT] = %08x\n", 2308 sc->sc_dev.dv_xname, reg_bcnt)); 2309 2310 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_CAP1] = %08x\n", 2311 sc->sc_dev.dv_xname, reg_cap1)); 2312 } 2313 2314 /* First beacon was sent at time 0 microseconds, current time is 2315 * tsfth << 32 | tsftl microseconds, and beacon interval is tbtt 2316 * microseconds. Return the expected time in microseconds for the 2317 * beacon after next. 2318 */ 2319 static __inline u_int64_t 2320 atw_predict_beacon(u_int64_t tsft, u_int32_t tbtt) 2321 { 2322 return tsft + (tbtt - tsft % tbtt); 2323 } 2324 2325 /* If we've created an IBSS, write the TSF time in the ADM8211 to 2326 * the ieee80211com. 2327 * 2328 * Predict the next target beacon transmission time (TBTT) and 2329 * write it to the ADM8211. 2330 */ 2331 static void 2332 atw_tsf(struct atw_softc *sc) 2333 { 2334 #define TBTTOFS 20 /* TU */ 2335 2336 struct ieee80211com *ic = &sc->sc_ic; 2337 u_int64_t tsft, tbtt; 2338 2339 if ((ic->ic_opmode == IEEE80211_M_HOSTAP) || 2340 ((ic->ic_opmode == IEEE80211_M_IBSS) && 2341 (ic->ic_flags & IEEE80211_F_SIBSS))) { 2342 tsft = ATW_READ(sc, ATW_TSFTH); 2343 tsft <<= 32; 2344 tsft |= ATW_READ(sc, ATW_TSFTL); 2345 *(u_int64_t*)&ic->ic_bss->ni_tstamp[0] = htole64(tsft); 2346 } else 2347 tsft = le64toh(*(u_int64_t*)&ic->ic_bss->ni_tstamp[0]); 2348 2349 tbtt = atw_predict_beacon(tsft, 2350 ic->ic_bss->ni_intval * IEEE80211_DUR_TU); 2351 2352 /* skip one more beacon so that the TBTT cannot pass before 2353 * we've programmed it, and also so that we can subtract a 2354 * few TU so that we wake a little before TBTT. 2355 */ 2356 tbtt += ic->ic_bss->ni_intval * IEEE80211_DUR_TU; 2357 2358 /* wake up a little early */ 2359 tbtt -= TBTTOFS * IEEE80211_DUR_TU; 2360 2361 DPRINTF(sc, ("%s: tsft %" PRIu64 " tbtt %" PRIu64 "\n", 2362 sc->sc_dev.dv_xname, tsft, tbtt)); 2363 2364 ATW_WRITE(sc, ATW_TOFS1, 2365 LSHIFT(1, ATW_TOFS1_TSFTOFSR_MASK) | 2366 LSHIFT(TBTTOFS, ATW_TOFS1_TBTTOFS_MASK) | 2367 LSHIFT( 2368 MASK_AND_RSHIFT((u_int32_t)tbtt, BITS(25, 10)), 2369 ATW_TOFS1_TBTTPRE_MASK)); 2370 #undef TBTTOFS 2371 } 2372 2373 static void 2374 atw_next_scan(void *arg) 2375 { 2376 struct atw_softc *sc = arg; 2377 struct ieee80211com *ic = &sc->sc_ic; 2378 struct ifnet *ifp = &ic->ic_if; 2379 int s; 2380 2381 /* don't call atw_start w/o network interrupts blocked */ 2382 s = splnet(); 2383 if (ic->ic_state == IEEE80211_S_SCAN) 2384 ieee80211_next_scan(ifp); 2385 splx(s); 2386 } 2387 2388 /* Synchronize the hardware state with the software state. */ 2389 static int 2390 atw_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 2391 { 2392 struct ifnet *ifp = &ic->ic_if; 2393 struct atw_softc *sc = ifp->if_softc; 2394 enum ieee80211_state ostate; 2395 int error; 2396 2397 ostate = ic->ic_state; 2398 2399 if (nstate == IEEE80211_S_INIT) { 2400 callout_stop(&sc->sc_scan_ch); 2401 sc->sc_cur_chan = IEEE80211_CHAN_ANY; 2402 atw_start_beacon(sc, 0); 2403 return (*sc->sc_newstate)(ic, nstate, arg); 2404 } 2405 2406 if ((error = atw_tune(sc)) != 0) 2407 return error; 2408 2409 switch (nstate) { 2410 case IEEE80211_S_ASSOC: 2411 break; 2412 case IEEE80211_S_INIT: 2413 panic("%s: unexpected state IEEE80211_S_INIT\n", __func__); 2414 break; 2415 case IEEE80211_S_SCAN: 2416 memset(sc->sc_bssid, 0, IEEE80211_ADDR_LEN); 2417 atw_write_bssid(sc); 2418 2419 callout_reset(&sc->sc_scan_ch, atw_dwelltime * hz / 1000, 2420 atw_next_scan, sc); 2421 2422 break; 2423 case IEEE80211_S_RUN: 2424 if (ic->ic_opmode == IEEE80211_M_STA) 2425 break; 2426 /*FALLTHROUGH*/ 2427 case IEEE80211_S_AUTH: 2428 atw_write_bssid(sc); 2429 atw_write_bcn_thresh(sc); 2430 atw_write_ssid(sc); 2431 atw_write_sup_rates(sc); 2432 2433 if (ic->ic_opmode == IEEE80211_M_AHDEMO || 2434 ic->ic_opmode == IEEE80211_M_MONITOR) 2435 break; 2436 2437 /* set listen interval 2438 * XXX do software units agree w/ hardware? 2439 */ 2440 ATW_WRITE(sc, ATW_BPLI, 2441 LSHIFT(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2442 LSHIFT(ic->ic_lintval / ic->ic_bss->ni_intval, 2443 ATW_BPLI_LI_MASK)); 2444 2445 DPRINTF(sc, ("%s: reg[ATW_BPLI] = %08x\n", 2446 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_BPLI))); 2447 2448 atw_tsf(sc); 2449 break; 2450 } 2451 2452 if (nstate != IEEE80211_S_SCAN) 2453 callout_stop(&sc->sc_scan_ch); 2454 2455 if (nstate == IEEE80211_S_RUN && 2456 (ic->ic_opmode == IEEE80211_M_HOSTAP || 2457 ic->ic_opmode == IEEE80211_M_IBSS)) 2458 atw_start_beacon(sc, 1); 2459 else 2460 atw_start_beacon(sc, 0); 2461 2462 return (*sc->sc_newstate)(ic, nstate, arg); 2463 } 2464 2465 /* 2466 * atw_add_rxbuf: 2467 * 2468 * Add a receive buffer to the indicated descriptor. 2469 */ 2470 int 2471 atw_add_rxbuf(struct atw_softc *sc, int idx) 2472 { 2473 struct atw_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2474 struct mbuf *m; 2475 int error; 2476 2477 MGETHDR(m, M_DONTWAIT, MT_DATA); 2478 if (m == NULL) 2479 return (ENOBUFS); 2480 2481 MCLGET(m, M_DONTWAIT); 2482 if ((m->m_flags & M_EXT) == 0) { 2483 m_freem(m); 2484 return (ENOBUFS); 2485 } 2486 2487 if (rxs->rxs_mbuf != NULL) 2488 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2489 2490 rxs->rxs_mbuf = m; 2491 2492 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 2493 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 2494 BUS_DMA_READ|BUS_DMA_NOWAIT); 2495 if (error) { 2496 printf("%s: can't load rx DMA map %d, error = %d\n", 2497 sc->sc_dev.dv_xname, idx, error); 2498 panic("atw_add_rxbuf"); /* XXX */ 2499 } 2500 2501 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2502 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2503 2504 ATW_INIT_RXDESC(sc, idx); 2505 2506 return (0); 2507 } 2508 2509 /* 2510 * Release any queued transmit buffers. 2511 */ 2512 void 2513 atw_txdrain(struct atw_softc *sc) 2514 { 2515 struct atw_txsoft *txs; 2516 2517 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 2518 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 2519 if (txs->txs_mbuf != NULL) { 2520 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2521 m_freem(txs->txs_mbuf); 2522 txs->txs_mbuf = NULL; 2523 } 2524 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 2525 } 2526 sc->sc_tx_timer = 0; 2527 } 2528 2529 /* 2530 * atw_stop: [ ifnet interface function ] 2531 * 2532 * Stop transmission on the interface. 2533 */ 2534 void 2535 atw_stop(struct ifnet *ifp, int disable) 2536 { 2537 struct atw_softc *sc = ifp->if_softc; 2538 struct ieee80211com *ic = &sc->sc_ic; 2539 2540 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2541 2542 /* Disable interrupts. */ 2543 ATW_WRITE(sc, ATW_IER, 0); 2544 2545 /* Stop the transmit and receive processes. */ 2546 sc->sc_opmode = 0; 2547 ATW_WRITE(sc, ATW_NAR, 0); 2548 ATW_WRITE(sc, ATW_TDBD, 0); 2549 ATW_WRITE(sc, ATW_TDBP, 0); 2550 ATW_WRITE(sc, ATW_RDB, 0); 2551 2552 atw_txdrain(sc); 2553 2554 if (disable) { 2555 atw_rxdrain(sc); 2556 atw_disable(sc); 2557 } 2558 2559 /* 2560 * Mark the interface down and cancel the watchdog timer. 2561 */ 2562 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2563 ifp->if_timer = 0; 2564 2565 if (!disable) 2566 atw_reset(sc); 2567 } 2568 2569 /* 2570 * atw_rxdrain: 2571 * 2572 * Drain the receive queue. 2573 */ 2574 void 2575 atw_rxdrain(struct atw_softc *sc) 2576 { 2577 struct atw_rxsoft *rxs; 2578 int i; 2579 2580 for (i = 0; i < ATW_NRXDESC; i++) { 2581 rxs = &sc->sc_rxsoft[i]; 2582 if (rxs->rxs_mbuf == NULL) 2583 continue; 2584 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2585 m_freem(rxs->rxs_mbuf); 2586 rxs->rxs_mbuf = NULL; 2587 } 2588 } 2589 2590 /* 2591 * atw_detach: 2592 * 2593 * Detach an ADM8211 interface. 2594 */ 2595 int 2596 atw_detach(struct atw_softc *sc) 2597 { 2598 struct ifnet *ifp = &sc->sc_ic.ic_if; 2599 struct atw_rxsoft *rxs; 2600 struct atw_txsoft *txs; 2601 int i; 2602 2603 /* 2604 * Succeed now if there isn't any work to do. 2605 */ 2606 if ((sc->sc_flags & ATWF_ATTACHED) == 0) 2607 return (0); 2608 2609 ieee80211_ifdetach(ifp); 2610 if_detach(ifp); 2611 2612 for (i = 0; i < ATW_NRXDESC; i++) { 2613 rxs = &sc->sc_rxsoft[i]; 2614 if (rxs->rxs_mbuf != NULL) { 2615 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2616 m_freem(rxs->rxs_mbuf); 2617 rxs->rxs_mbuf = NULL; 2618 } 2619 bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap); 2620 } 2621 for (i = 0; i < ATW_TXQUEUELEN; i++) { 2622 txs = &sc->sc_txsoft[i]; 2623 if (txs->txs_mbuf != NULL) { 2624 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2625 m_freem(txs->txs_mbuf); 2626 txs->txs_mbuf = NULL; 2627 } 2628 bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap); 2629 } 2630 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 2631 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 2632 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 2633 sizeof(struct atw_control_data)); 2634 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 2635 2636 shutdownhook_disestablish(sc->sc_sdhook); 2637 powerhook_disestablish(sc->sc_powerhook); 2638 2639 if (sc->sc_srom) 2640 free(sc->sc_srom, M_DEVBUF); 2641 2642 return (0); 2643 } 2644 2645 /* atw_shutdown: make sure the interface is stopped at reboot time. */ 2646 void 2647 atw_shutdown(void *arg) 2648 { 2649 struct atw_softc *sc = arg; 2650 2651 atw_stop(&sc->sc_ic.ic_if, 1); 2652 } 2653 2654 int 2655 atw_intr(void *arg) 2656 { 2657 struct atw_softc *sc = arg; 2658 struct ifnet *ifp = &sc->sc_ic.ic_if; 2659 u_int32_t status, rxstatus, txstatus, linkstatus; 2660 int handled = 0, txthresh; 2661 2662 #ifdef DEBUG 2663 if (ATW_IS_ENABLED(sc) == 0) 2664 panic("%s: atw_intr: not enabled", sc->sc_dev.dv_xname); 2665 #endif 2666 2667 /* 2668 * If the interface isn't running, the interrupt couldn't 2669 * possibly have come from us. 2670 */ 2671 if ((ifp->if_flags & IFF_RUNNING) == 0 || 2672 (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 2673 return (0); 2674 2675 for (;;) { 2676 status = ATW_READ(sc, ATW_STSR); 2677 2678 if (status) 2679 ATW_WRITE(sc, ATW_STSR, status); 2680 2681 if (sc->sc_intr_ack != NULL) 2682 (*sc->sc_intr_ack)(sc); 2683 2684 #ifdef ATW_DEBUG 2685 #define PRINTINTR(flag) do { \ 2686 if ((status & flag) != 0) { \ 2687 printf("%s" #flag, delim); \ 2688 delim = ","; \ 2689 } \ 2690 } while (0) 2691 2692 if (atw_debug > 1 && status) { 2693 const char *delim = "<"; 2694 2695 printf("%s: reg[STSR] = %x", 2696 sc->sc_dev.dv_xname, status); 2697 2698 PRINTINTR(ATW_INTR_FBE); 2699 PRINTINTR(ATW_INTR_LINKOFF); 2700 PRINTINTR(ATW_INTR_LINKON); 2701 PRINTINTR(ATW_INTR_RCI); 2702 PRINTINTR(ATW_INTR_RDU); 2703 PRINTINTR(ATW_INTR_REIS); 2704 PRINTINTR(ATW_INTR_RPS); 2705 PRINTINTR(ATW_INTR_TCI); 2706 PRINTINTR(ATW_INTR_TDU); 2707 PRINTINTR(ATW_INTR_TLT); 2708 PRINTINTR(ATW_INTR_TPS); 2709 PRINTINTR(ATW_INTR_TRT); 2710 PRINTINTR(ATW_INTR_TUF); 2711 PRINTINTR(ATW_INTR_BCNTC); 2712 PRINTINTR(ATW_INTR_ATIME); 2713 PRINTINTR(ATW_INTR_TBTT); 2714 PRINTINTR(ATW_INTR_TSCZ); 2715 PRINTINTR(ATW_INTR_TSFTF); 2716 printf(">\n"); 2717 } 2718 #undef PRINTINTR 2719 #endif /* ATW_DEBUG */ 2720 2721 if ((status & sc->sc_inten) == 0) 2722 break; 2723 2724 handled = 1; 2725 2726 rxstatus = status & sc->sc_rxint_mask; 2727 txstatus = status & sc->sc_txint_mask; 2728 linkstatus = status & sc->sc_linkint_mask; 2729 2730 if (linkstatus) { 2731 atw_linkintr(sc, linkstatus); 2732 } 2733 2734 if (rxstatus) { 2735 /* Grab any new packets. */ 2736 atw_rxintr(sc); 2737 2738 if (rxstatus & ATW_INTR_RDU) { 2739 printf("%s: receive ring overrun\n", 2740 sc->sc_dev.dv_xname); 2741 /* Get the receive process going again. */ 2742 ATW_WRITE(sc, ATW_RDR, 0x1); 2743 break; 2744 } 2745 } 2746 2747 if (txstatus) { 2748 /* Sweep up transmit descriptors. */ 2749 atw_txintr(sc); 2750 2751 if (txstatus & ATW_INTR_TLT) 2752 DPRINTF(sc, ("%s: tx lifetime exceeded\n", 2753 sc->sc_dev.dv_xname)); 2754 2755 if (txstatus & ATW_INTR_TRT) 2756 DPRINTF(sc, ("%s: tx retry limit exceeded\n", 2757 sc->sc_dev.dv_xname)); 2758 2759 /* If Tx under-run, increase our transmit threshold 2760 * if another is available. 2761 */ 2762 txthresh = sc->sc_txthresh + 1; 2763 if ((txstatus & ATW_INTR_TUF) && 2764 sc->sc_txth[txthresh].txth_name != NULL) { 2765 /* Idle the transmit process. */ 2766 atw_idle(sc, ATW_NAR_ST); 2767 2768 sc->sc_txthresh = txthresh; 2769 sc->sc_opmode &= ~(ATW_NAR_TR_MASK|ATW_NAR_SF); 2770 sc->sc_opmode |= 2771 sc->sc_txth[txthresh].txth_opmode; 2772 printf("%s: transmit underrun; new " 2773 "threshold: %s\n", sc->sc_dev.dv_xname, 2774 sc->sc_txth[txthresh].txth_name); 2775 2776 /* Set the new threshold and restart 2777 * the transmit process. 2778 */ 2779 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2780 /* XXX Log every Nth underrun from 2781 * XXX now on? 2782 */ 2783 } 2784 } 2785 2786 if (status & (ATW_INTR_TPS|ATW_INTR_RPS)) { 2787 if (status & ATW_INTR_TPS) 2788 printf("%s: transmit process stopped\n", 2789 sc->sc_dev.dv_xname); 2790 if (status & ATW_INTR_RPS) 2791 printf("%s: receive process stopped\n", 2792 sc->sc_dev.dv_xname); 2793 (void)atw_init(ifp); 2794 break; 2795 } 2796 2797 if (status & ATW_INTR_FBE) { 2798 printf("%s: fatal bus error\n", sc->sc_dev.dv_xname); 2799 (void)atw_init(ifp); 2800 break; 2801 } 2802 2803 /* 2804 * Not handled: 2805 * 2806 * Transmit buffer unavailable -- normal 2807 * condition, nothing to do, really. 2808 * 2809 * Early receive interrupt -- not available on 2810 * all chips, we just use RI. We also only 2811 * use single-segment receive DMA, so this 2812 * is mostly useless. 2813 * 2814 * TBD others 2815 */ 2816 } 2817 2818 /* Try to get more packets going. */ 2819 atw_start(ifp); 2820 2821 return (handled); 2822 } 2823 2824 /* 2825 * atw_idle: 2826 * 2827 * Cause the transmit and/or receive processes to go idle. 2828 * 2829 * XXX It seems that the ADM8211 will not signal the end of the Rx/Tx 2830 * process in STSR if I clear SR or ST after the process has already 2831 * ceased. Fair enough. But the Rx process status bits in ATW_TEST0 2832 * do not seem to be too reliable. Perhaps I have the sense of the 2833 * Rx bits switched with the Tx bits? 2834 */ 2835 void 2836 atw_idle(struct atw_softc *sc, u_int32_t bits) 2837 { 2838 u_int32_t ackmask = 0, opmode, stsr, test0; 2839 int i, s; 2840 2841 /* without this, somehow we run concurrently w/ interrupt handler */ 2842 s = splnet(); 2843 2844 opmode = sc->sc_opmode & ~bits; 2845 2846 if (bits & ATW_NAR_SR) 2847 ackmask |= ATW_INTR_RPS; 2848 2849 if (bits & ATW_NAR_ST) { 2850 ackmask |= ATW_INTR_TPS; 2851 /* set ATW_NAR_HF to flush TX FIFO. */ 2852 opmode |= ATW_NAR_HF; 2853 } 2854 2855 ATW_WRITE(sc, ATW_NAR, opmode); 2856 2857 for (i = 0; i < 1000; i++) { 2858 stsr = ATW_READ(sc, ATW_STSR); 2859 if ((stsr & ackmask) == ackmask) 2860 break; 2861 DELAY(10); 2862 } 2863 2864 ATW_WRITE(sc, ATW_STSR, stsr & ackmask); 2865 2866 if ((stsr & ackmask) == ackmask) 2867 goto out; 2868 2869 test0 = ATW_READ(sc, ATW_TEST0); 2870 2871 if ((bits & ATW_NAR_ST) != 0 && (stsr & ATW_INTR_TPS) == 0 && 2872 (test0 & ATW_TEST0_TS_MASK) != ATW_TEST0_TS_STOPPED) { 2873 printf("%s: transmit process not idle [%s]\n", 2874 sc->sc_dev.dv_xname, 2875 atw_tx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_TS_MASK)]); 2876 printf("%s: bits %08x test0 %08x stsr %08x\n", 2877 sc->sc_dev.dv_xname, bits, test0, stsr); 2878 } 2879 2880 if ((bits & ATW_NAR_SR) != 0 && (stsr & ATW_INTR_RPS) == 0 && 2881 (test0 & ATW_TEST0_RS_MASK) != ATW_TEST0_RS_STOPPED) { 2882 DPRINTF2(sc, ("%s: receive process not idle [%s]\n", 2883 sc->sc_dev.dv_xname, 2884 atw_rx_state[MASK_AND_RSHIFT(test0, ATW_TEST0_RS_MASK)])); 2885 DPRINTF2(sc, ("%s: bits %08x test0 %08x stsr %08x\n", 2886 sc->sc_dev.dv_xname, bits, test0, stsr)); 2887 } 2888 out: 2889 if ((bits & ATW_NAR_ST) != 0) 2890 atw_txdrain(sc); 2891 splx(s); 2892 return; 2893 } 2894 2895 /* 2896 * atw_linkintr: 2897 * 2898 * Helper; handle link-status interrupts. 2899 */ 2900 void 2901 atw_linkintr(struct atw_softc *sc, u_int32_t linkstatus) 2902 { 2903 struct ieee80211com *ic = &sc->sc_ic; 2904 2905 if (ic->ic_state != IEEE80211_S_RUN) 2906 return; 2907 2908 if (linkstatus & ATW_INTR_LINKON) { 2909 DPRINTF(sc, ("%s: link on\n", sc->sc_dev.dv_xname)); 2910 sc->sc_rescan_timer = 0; 2911 } else if (linkstatus & ATW_INTR_LINKOFF) { 2912 DPRINTF(sc, ("%s: link off\n", sc->sc_dev.dv_xname)); 2913 if (ic->ic_opmode != IEEE80211_M_STA) 2914 return; 2915 sc->sc_rescan_timer = 3; 2916 ic->ic_if.if_timer = 1; 2917 } 2918 } 2919 2920 /* 2921 * atw_rxintr: 2922 * 2923 * Helper; handle receive interrupts. 2924 */ 2925 void 2926 atw_rxintr(struct atw_softc *sc) 2927 { 2928 static int rate_tbl[] = {2, 4, 11, 22, 44}; 2929 struct ieee80211com *ic = &sc->sc_ic; 2930 struct ieee80211_node *ni; 2931 struct ieee80211_frame *wh; 2932 struct ifnet *ifp = &ic->ic_if; 2933 struct atw_rxsoft *rxs; 2934 struct mbuf *m; 2935 u_int32_t rxstat; 2936 int i, len, rate, rate0; 2937 u_int32_t rssi; 2938 2939 for (i = sc->sc_rxptr;; i = ATW_NEXTRX(i)) { 2940 rxs = &sc->sc_rxsoft[i]; 2941 2942 ATW_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 2943 2944 rxstat = le32toh(sc->sc_rxdescs[i].ar_stat); 2945 rssi = le32toh(sc->sc_rxdescs[i].ar_rssi); 2946 rate0 = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_RXDR_MASK); 2947 2948 if (rxstat & ATW_RXSTAT_OWN) 2949 break; /* We have processed all receive buffers. */ 2950 2951 DPRINTF3(sc, 2952 ("%s: rx stat %08x rssi %08x buf1 %08x buf2 %08x\n", 2953 sc->sc_dev.dv_xname, 2954 sc->sc_rxdescs[i].ar_stat, 2955 sc->sc_rxdescs[i].ar_rssi, 2956 sc->sc_rxdescs[i].ar_buf1, 2957 sc->sc_rxdescs[i].ar_buf2)); 2958 2959 /* 2960 * Make sure the packet fits in one buffer. This should 2961 * always be the case. 2962 */ 2963 if ((rxstat & (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) != 2964 (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) { 2965 printf("%s: incoming packet spilled, resetting\n", 2966 sc->sc_dev.dv_xname); 2967 (void)atw_init(ifp); 2968 return; 2969 } 2970 2971 /* 2972 * If an error occurred, update stats, clear the status 2973 * word, and leave the packet buffer in place. It will 2974 * simply be reused the next time the ring comes around. 2975 * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long 2976 * error. 2977 */ 2978 2979 if ((rxstat & ATW_RXSTAT_ES) != 0 && 2980 ((sc->sc_ic.ic_ec.ec_capenable & ETHERCAP_VLAN_MTU) == 0 || 2981 (rxstat & (ATW_RXSTAT_DE | ATW_RXSTAT_SFDE | 2982 ATW_RXSTAT_SIGE | ATW_RXSTAT_CRC16E | 2983 ATW_RXSTAT_RXTOE | ATW_RXSTAT_CRC32E | 2984 ATW_RXSTAT_ICVE)) != 0)) { 2985 #define PRINTERR(bit, str) \ 2986 if (rxstat & (bit)) \ 2987 printf("%s: receive error: %s\n", \ 2988 sc->sc_dev.dv_xname, str) 2989 ifp->if_ierrors++; 2990 PRINTERR(ATW_RXSTAT_DE, "descriptor error"); 2991 PRINTERR(ATW_RXSTAT_SFDE, "PLCP SFD error"); 2992 PRINTERR(ATW_RXSTAT_SIGE, "PLCP signal error"); 2993 PRINTERR(ATW_RXSTAT_CRC16E, "PLCP CRC16 error"); 2994 PRINTERR(ATW_RXSTAT_RXTOE, "time-out"); 2995 PRINTERR(ATW_RXSTAT_CRC32E, "FCS error"); 2996 PRINTERR(ATW_RXSTAT_ICVE, "WEP ICV error"); 2997 #undef PRINTERR 2998 ATW_INIT_RXDESC(sc, i); 2999 continue; 3000 } 3001 3002 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3003 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 3004 3005 /* 3006 * No errors; receive the packet. Note the ADM8211 3007 * includes the CRC in promiscuous mode. 3008 */ 3009 len = MASK_AND_RSHIFT(rxstat, ATW_RXSTAT_FL_MASK); 3010 3011 /* 3012 * Allocate a new mbuf cluster. If that fails, we are 3013 * out of memory, and must drop the packet and recycle 3014 * the buffer that's already attached to this descriptor. 3015 */ 3016 m = rxs->rxs_mbuf; 3017 if (atw_add_rxbuf(sc, i) != 0) { 3018 ifp->if_ierrors++; 3019 ATW_INIT_RXDESC(sc, i); 3020 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3021 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 3022 continue; 3023 } 3024 3025 ifp->if_ipackets++; 3026 if (sc->sc_opmode & ATW_NAR_PR) 3027 m->m_flags |= M_HASFCS; 3028 m->m_pkthdr.rcvif = ifp; 3029 m->m_pkthdr.len = m->m_len = len; 3030 3031 if (rate0 >= sizeof(rate_tbl) / sizeof(rate_tbl[0])) 3032 rate = 0; 3033 else 3034 rate = rate_tbl[rate0]; 3035 3036 #if NBPFILTER > 0 3037 /* Pass this up to any BPF listeners. */ 3038 if (sc->sc_radiobpf != NULL) { 3039 struct atw_rx_radiotap_header *tap = &sc->sc_rxtap; 3040 3041 tap->ar_rate = rate; 3042 tap->ar_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3043 tap->ar_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3044 3045 /* TBD verify units are dB */ 3046 tap->ar_antsignal = (int)rssi; 3047 /* TBD tap->ar_flags */ 3048 3049 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3050 tap->ar_ihdr.it_len, m); 3051 } 3052 #endif /* NPBFILTER > 0 */ 3053 3054 wh = mtod(m, struct ieee80211_frame *); 3055 ni = ieee80211_find_rxnode(ic, wh); 3056 ieee80211_input(ifp, m, ni, (int)rssi, 0); 3057 /* 3058 * The frame may have caused the node to be marked for 3059 * reclamation (e.g. in response to a DEAUTH message) 3060 * so use free_node here instead of unref_node. 3061 */ 3062 if (ni == ic->ic_bss) 3063 ieee80211_unref_node(&ni); 3064 else 3065 ieee80211_free_node(ic, ni); 3066 } 3067 3068 /* Update the receive pointer. */ 3069 sc->sc_rxptr = i; 3070 } 3071 3072 /* 3073 * atw_txintr: 3074 * 3075 * Helper; handle transmit interrupts. 3076 */ 3077 void 3078 atw_txintr(struct atw_softc *sc) 3079 { 3080 #define TXSTAT_ERRMASK (ATW_TXSTAT_TUF | ATW_TXSTAT_TLT | ATW_TXSTAT_TRT | \ 3081 ATW_TXSTAT_TRO | ATW_TXSTAT_SOFBR) 3082 #define TXSTAT_FMT "\20\31ATW_TXSTAT_SOFBR\32ATW_TXSTAT_TRO\33ATW_TXSTAT_TUF" \ 3083 "\34ATW_TXSTAT_TRT\35ATW_TXSTAT_TLT" 3084 3085 static char txstat_buf[sizeof("ffffffff<>" TXSTAT_FMT)]; 3086 struct ifnet *ifp = &sc->sc_ic.ic_if; 3087 struct atw_txsoft *txs; 3088 u_int32_t txstat; 3089 3090 DPRINTF3(sc, ("%s: atw_txintr: sc_flags 0x%08x\n", 3091 sc->sc_dev.dv_xname, sc->sc_flags)); 3092 3093 ifp->if_flags &= ~IFF_OACTIVE; 3094 3095 /* 3096 * Go through our Tx list and free mbufs for those 3097 * frames that have been transmitted. 3098 */ 3099 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 3100 ATW_CDTXSYNC(sc, txs->txs_lastdesc, 3101 txs->txs_ndescs, 3102 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3103 3104 #ifdef ATW_DEBUG 3105 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3106 int i; 3107 printf(" txsoft %p transmit chain:\n", txs); 3108 for (i = txs->txs_firstdesc;; i = ATW_NEXTTX(i)) { 3109 printf(" descriptor %d:\n", i); 3110 printf(" at_status: 0x%08x\n", 3111 le32toh(sc->sc_txdescs[i].at_stat)); 3112 printf(" at_flags: 0x%08x\n", 3113 le32toh(sc->sc_txdescs[i].at_flags)); 3114 printf(" at_buf1: 0x%08x\n", 3115 le32toh(sc->sc_txdescs[i].at_buf1)); 3116 printf(" at_buf2: 0x%08x\n", 3117 le32toh(sc->sc_txdescs[i].at_buf2)); 3118 if (i == txs->txs_lastdesc) 3119 break; 3120 } 3121 } 3122 #endif 3123 3124 txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].at_stat); 3125 if (txstat & ATW_TXSTAT_OWN) 3126 break; 3127 3128 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 3129 3130 sc->sc_txfree += txs->txs_ndescs; 3131 3132 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 3133 0, txs->txs_dmamap->dm_mapsize, 3134 BUS_DMASYNC_POSTWRITE); 3135 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 3136 m_freem(txs->txs_mbuf); 3137 txs->txs_mbuf = NULL; 3138 3139 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 3140 3141 if ((ifp->if_flags & IFF_DEBUG) != 0 && 3142 (txstat & TXSTAT_ERRMASK) != 0) { 3143 bitmask_snprintf(txstat & TXSTAT_ERRMASK, TXSTAT_FMT, 3144 txstat_buf, sizeof(txstat_buf)); 3145 printf("%s: txstat %s %d\n", sc->sc_dev.dv_xname, 3146 txstat_buf, 3147 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK)); 3148 } 3149 3150 /* 3151 * Check for errors and collisions. 3152 */ 3153 if (txstat & ATW_TXSTAT_TUF) 3154 sc->sc_stats.ts_tx_tuf++; 3155 if (txstat & ATW_TXSTAT_TLT) 3156 sc->sc_stats.ts_tx_tlt++; 3157 if (txstat & ATW_TXSTAT_TRT) 3158 sc->sc_stats.ts_tx_trt++; 3159 if (txstat & ATW_TXSTAT_TRO) 3160 sc->sc_stats.ts_tx_tro++; 3161 if (txstat & ATW_TXSTAT_SOFBR) { 3162 sc->sc_stats.ts_tx_sofbr++; 3163 } 3164 3165 if ((txstat & ATW_TXSTAT_ES) == 0) 3166 ifp->if_collisions += 3167 MASK_AND_RSHIFT(txstat, ATW_TXSTAT_ARC_MASK); 3168 else 3169 ifp->if_oerrors++; 3170 3171 ifp->if_opackets++; 3172 } 3173 3174 /* 3175 * If there are no more pending transmissions, cancel the watchdog 3176 * timer. 3177 */ 3178 if (txs == NULL) 3179 sc->sc_tx_timer = 0; 3180 #undef TXSTAT_ERRMASK 3181 #undef TXSTAT_FMT 3182 } 3183 3184 /* 3185 * atw_watchdog: [ifnet interface function] 3186 * 3187 * Watchdog timer handler. 3188 */ 3189 void 3190 atw_watchdog(struct ifnet *ifp) 3191 { 3192 struct atw_softc *sc = ifp->if_softc; 3193 struct ieee80211com *ic = &sc->sc_ic; 3194 3195 ifp->if_timer = 0; 3196 if (ATW_IS_ENABLED(sc) == 0) 3197 return; 3198 3199 if (sc->sc_rescan_timer) { 3200 if (--sc->sc_rescan_timer == 0) 3201 (void)ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3202 } 3203 if (sc->sc_tx_timer) { 3204 if (--sc->sc_tx_timer == 0 && 3205 !SIMPLEQ_EMPTY(&sc->sc_txdirtyq)) { 3206 printf("%s: transmit timeout\n", ifp->if_xname); 3207 ifp->if_oerrors++; 3208 (void)atw_init(ifp); 3209 atw_start(ifp); 3210 } 3211 } 3212 if (sc->sc_tx_timer != 0 || sc->sc_rescan_timer != 0) 3213 ifp->if_timer = 1; 3214 ieee80211_watchdog(ifp); 3215 } 3216 3217 /* Compute the 802.11 Duration field and the PLCP Length fields for 3218 * a len-byte frame (HEADER + PAYLOAD + FCS) sent at rate * 500Kbps. 3219 * Write the fields to the ADM8211 Tx header, frm. 3220 * 3221 * TBD use the fragmentation threshold to find the right duration for 3222 * the first & last fragments. 3223 * 3224 * TBD make certain of the duration fields applied by the ADM8211 to each 3225 * fragment. I think that the ADM8211 knows how to subtract the CTS 3226 * duration when ATW_HDRCTL_RTSCTS is clear; that is why I add it regardless. 3227 * I also think that the ADM8211 does *some* arithmetic for us, because 3228 * otherwise I think we would have to set a first duration for CTS/first 3229 * fragment, a second duration for fragments between the first and the 3230 * last, and a third duration for the last fragment. 3231 * 3232 * TBD make certain that duration fields reflect addition of FCS/WEP 3233 * and correct duration arithmetic as necessary. 3234 */ 3235 static void 3236 atw_frame_setdurs(struct atw_softc *sc, struct atw_frame *frm, int rate, 3237 int len) 3238 { 3239 int remainder; 3240 3241 /* deal also with encrypted fragments */ 3242 if (frm->atw_hdrctl & htole16(ATW_HDRCTL_WEP)) { 3243 DPRINTF2(sc, ("%s: atw_frame_setdurs len += 8\n", 3244 sc->sc_dev.dv_xname)); 3245 len += IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN + 3246 IEEE80211_WEP_CRCLEN; 3247 } 3248 3249 /* 802.11 Duration Field for CTS/Data/ACK sequence minus FCS & WEP 3250 * duration (XXX added by MAC?). 3251 */ 3252 frm->atw_head_dur = (16 * (len - IEEE80211_CRC_LEN)) / rate; 3253 remainder = (16 * (len - IEEE80211_CRC_LEN)) % rate; 3254 3255 if (rate <= 4) 3256 /* 1-2Mbps WLAN: send ACK/CTS at 1Mbps */ 3257 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3258 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3259 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3260 IEEE80211_DUR_DS_SLOW_CTS + IEEE80211_DUR_DS_SLOW_ACK; 3261 else 3262 /* 5-11Mbps WLAN: send ACK/CTS at 2Mbps */ 3263 frm->atw_head_dur += 3 * (IEEE80211_DUR_DS_SIFS + 3264 IEEE80211_DUR_DS_SHORT_PREAMBLE + 3265 IEEE80211_DUR_DS_FAST_PLCPHDR) + 3266 IEEE80211_DUR_DS_FAST_CTS + IEEE80211_DUR_DS_FAST_ACK; 3267 3268 /* lengthen duration if long preamble */ 3269 if ((sc->sc_flags & ATWF_SHORT_PREAMBLE) == 0) 3270 frm->atw_head_dur += 3271 3 * (IEEE80211_DUR_DS_LONG_PREAMBLE - 3272 IEEE80211_DUR_DS_SHORT_PREAMBLE) + 3273 3 * (IEEE80211_DUR_DS_SLOW_PLCPHDR - 3274 IEEE80211_DUR_DS_FAST_PLCPHDR); 3275 3276 if (remainder != 0) 3277 frm->atw_head_dur++; 3278 3279 if ((atw_voodoo & VOODOO_DUR_2_4_SPECIALCASE) && 3280 (rate == 2 || rate == 4)) { 3281 /* derived from Linux: how could this be right? */ 3282 frm->atw_head_plcplen = frm->atw_head_dur; 3283 } else { 3284 frm->atw_head_plcplen = (16 * len) / rate; 3285 remainder = (80 * len) % (rate * 5); 3286 3287 if (remainder != 0) { 3288 frm->atw_head_plcplen++; 3289 3290 /* XXX magic */ 3291 if ((atw_voodoo & VOODOO_DUR_11_ROUNDING) && 3292 rate == 22 && remainder <= 30) 3293 frm->atw_head_plcplen |= 0x8000; 3294 } 3295 } 3296 frm->atw_tail_plcplen = frm->atw_head_plcplen = 3297 htole16(frm->atw_head_plcplen); 3298 frm->atw_tail_dur = frm->atw_head_dur = htole16(frm->atw_head_dur); 3299 } 3300 3301 #ifdef ATW_DEBUG 3302 static void 3303 atw_dump_pkt(struct ifnet *ifp, struct mbuf *m0) 3304 { 3305 struct atw_softc *sc = ifp->if_softc; 3306 struct mbuf *m; 3307 int i, noctets = 0; 3308 3309 printf("%s: %d-byte packet\n", sc->sc_dev.dv_xname, 3310 m0->m_pkthdr.len); 3311 3312 for (m = m0; m; m = m->m_next) { 3313 if (m->m_len == 0) 3314 continue; 3315 for (i = 0; i < m->m_len; i++) { 3316 printf(" %02x", ((u_int8_t*)m->m_data)[i]); 3317 if (++noctets % 24 == 0) 3318 printf("\n"); 3319 } 3320 } 3321 printf("%s%s: %d bytes emitted\n", 3322 (noctets % 24 != 0) ? "\n" : "", sc->sc_dev.dv_xname, noctets); 3323 } 3324 #endif /* ATW_DEBUG */ 3325 3326 /* 3327 * atw_start: [ifnet interface function] 3328 * 3329 * Start packet transmission on the interface. 3330 */ 3331 void 3332 atw_start(struct ifnet *ifp) 3333 { 3334 struct atw_softc *sc = ifp->if_softc; 3335 struct ieee80211com *ic = &sc->sc_ic; 3336 struct ieee80211_node *ni; 3337 struct ieee80211_frame *wh; 3338 struct atw_frame *hh; 3339 struct mbuf *m0, *m; 3340 struct atw_txsoft *txs, *last_txs; 3341 struct atw_txdesc *txd; 3342 int do_encrypt, rate; 3343 bus_dmamap_t dmamap; 3344 int ctl, error, firsttx, nexttx, lasttx = -1, first, ofree, seg; 3345 3346 DPRINTF2(sc, ("%s: atw_start: sc_flags 0x%08x, if_flags 0x%08x\n", 3347 sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags)); 3348 3349 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 3350 return; 3351 3352 #if 0 /* TBD ??? */ 3353 if ((sc->sc_flags & ATWF_LINK_UP) == 0 && ifp->if_snd.ifq_len < 10) 3354 return; 3355 #endif 3356 3357 /* 3358 * Remember the previous number of free descriptors and 3359 * the first descriptor we'll use. 3360 */ 3361 ofree = sc->sc_txfree; 3362 firsttx = sc->sc_txnext; 3363 3364 DPRINTF2(sc, ("%s: atw_start: txfree %d, txnext %d\n", 3365 sc->sc_dev.dv_xname, ofree, firsttx)); 3366 3367 /* 3368 * Loop through the send queue, setting up transmit descriptors 3369 * until we drain the queue, or use up all available transmit 3370 * descriptors. 3371 */ 3372 while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && 3373 sc->sc_txfree != 0) { 3374 3375 /* 3376 * Grab a packet off the management queue, if it 3377 * is not empty. Otherwise, from the data queue. 3378 */ 3379 IF_DEQUEUE(&ic->ic_mgtq, m0); 3380 if (m0 != NULL) { 3381 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 3382 m0->m_pkthdr.rcvif = NULL; 3383 } else { 3384 IFQ_DEQUEUE(&ifp->if_snd, m0); 3385 if (m0 == NULL) 3386 break; 3387 #if NBPFILTER > 0 3388 if (ifp->if_bpf != NULL) 3389 bpf_mtap(ifp->if_bpf, m0); 3390 #endif /* NBPFILTER > 0 */ 3391 if ((m0 = ieee80211_encap(ifp, m0, &ni)) == NULL) { 3392 ifp->if_oerrors++; 3393 break; 3394 } 3395 } 3396 3397 rate = MAX(ieee80211_get_rate(ic), 2); 3398 3399 #if NBPFILTER > 0 3400 /* 3401 * Pass the packet to any BPF listeners. 3402 */ 3403 if (ic->ic_rawbpf != NULL) 3404 bpf_mtap((caddr_t)ic->ic_rawbpf, m0); 3405 3406 if (sc->sc_radiobpf != NULL) { 3407 struct atw_tx_radiotap_header *tap = &sc->sc_txtap; 3408 3409 tap->at_rate = rate; 3410 tap->at_chan_freq = ic->ic_bss->ni_chan->ic_freq; 3411 tap->at_chan_flags = ic->ic_bss->ni_chan->ic_flags; 3412 3413 /* TBD tap->at_flags */ 3414 3415 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3416 tap->at_ihdr.it_len, m0); 3417 } 3418 #endif /* NBPFILTER > 0 */ 3419 3420 M_PREPEND(m0, offsetof(struct atw_frame, atw_ihdr), M_DONTWAIT); 3421 3422 if (ni != NULL && ni != ic->ic_bss) 3423 ieee80211_free_node(ic, ni); 3424 3425 if (m0 == NULL) { 3426 ifp->if_oerrors++; 3427 break; 3428 } 3429 3430 /* just to make sure. */ 3431 m0 = m_pullup(m0, sizeof(struct atw_frame)); 3432 3433 if (m0 == NULL) { 3434 ifp->if_oerrors++; 3435 break; 3436 } 3437 3438 hh = mtod(m0, struct atw_frame *); 3439 wh = &hh->atw_ihdr; 3440 3441 do_encrypt = ((wh->i_fc[1] & IEEE80211_FC1_WEP) != 0) ? 1 : 0; 3442 3443 /* Copy everything we need from the 802.11 header: 3444 * Frame Control; address 1, address 3, or addresses 3445 * 3 and 4. NIC fills in BSSID, SA. 3446 */ 3447 if (wh->i_fc[1] & IEEE80211_FC1_DIR_TODS) { 3448 if (wh->i_fc[1] & IEEE80211_FC1_DIR_FROMDS) 3449 panic("%s: illegal WDS frame", 3450 sc->sc_dev.dv_xname); 3451 memcpy(hh->atw_dst, wh->i_addr3, IEEE80211_ADDR_LEN); 3452 } else 3453 memcpy(hh->atw_dst, wh->i_addr1, IEEE80211_ADDR_LEN); 3454 3455 *(u_int16_t*)hh->atw_fc = *(u_int16_t*)wh->i_fc; 3456 3457 /* initialize remaining Tx parameters */ 3458 memset(&hh->u, 0, sizeof(hh->u)); 3459 3460 hh->atw_rate = rate * 5; 3461 /* XXX this could be incorrect if M_FCS. _encap should 3462 * probably strip FCS just in case it sticks around in 3463 * bridged packets. 3464 */ 3465 hh->atw_service = IEEE80211_PLCP_SERVICE; /* XXX guess */ 3466 hh->atw_paylen = htole16(m0->m_pkthdr.len - 3467 sizeof(struct atw_frame)); 3468 3469 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3470 hh->atw_rtylmt = 3; 3471 hh->atw_hdrctl = htole16(ATW_HDRCTL_UNKNOWN1); 3472 if (do_encrypt) { 3473 hh->atw_hdrctl |= htole16(ATW_HDRCTL_WEP); 3474 hh->atw_keyid = ic->ic_wep_txkey; 3475 } 3476 3477 /* TBD 4-addr frames */ 3478 atw_frame_setdurs(sc, hh, rate, 3479 m0->m_pkthdr.len - sizeof(struct atw_frame) + 3480 sizeof(struct ieee80211_frame) + IEEE80211_CRC_LEN); 3481 3482 /* never fragment multicast frames */ 3483 if (IEEE80211_IS_MULTICAST(hh->atw_dst)) { 3484 hh->atw_fragthr = htole16(ATW_FRAGTHR_FRAGTHR_MASK); 3485 } else if (sc->sc_flags & ATWF_RTSCTS) { 3486 hh->atw_hdrctl |= htole16(ATW_HDRCTL_RTSCTS); 3487 } 3488 3489 #ifdef ATW_DEBUG 3490 hh->atw_fragnum = 0; 3491 3492 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3493 printf("%s: dst = %s, rate = 0x%02x, " 3494 "service = 0x%02x, paylen = 0x%04x\n", 3495 sc->sc_dev.dv_xname, ether_sprintf(hh->atw_dst), 3496 hh->atw_rate, hh->atw_service, hh->atw_paylen); 3497 3498 printf("%s: fc[0] = 0x%02x, fc[1] = 0x%02x, " 3499 "dur1 = 0x%04x, dur2 = 0x%04x, " 3500 "dur3 = 0x%04x, rts_dur = 0x%04x\n", 3501 sc->sc_dev.dv_xname, hh->atw_fc[0], hh->atw_fc[1], 3502 hh->atw_tail_plcplen, hh->atw_head_plcplen, 3503 hh->atw_tail_dur, hh->atw_head_dur); 3504 3505 printf("%s: hdrctl = 0x%04x, fragthr = 0x%04x, " 3506 "fragnum = 0x%02x, rtylmt = 0x%04x\n", 3507 sc->sc_dev.dv_xname, hh->atw_hdrctl, 3508 hh->atw_fragthr, hh->atw_fragnum, hh->atw_rtylmt); 3509 3510 printf("%s: keyid = %d\n", 3511 sc->sc_dev.dv_xname, hh->atw_keyid); 3512 3513 atw_dump_pkt(ifp, m0); 3514 } 3515 #endif /* ATW_DEBUG */ 3516 3517 dmamap = txs->txs_dmamap; 3518 3519 /* 3520 * Load the DMA map. Copy and try (once) again if the packet 3521 * didn't fit in the alloted number of segments. 3522 */ 3523 for (first = 1; 3524 (error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 3525 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 && first; 3526 first = 0) { 3527 MGETHDR(m, M_DONTWAIT, MT_DATA); 3528 if (m == NULL) { 3529 printf("%s: unable to allocate Tx mbuf\n", 3530 sc->sc_dev.dv_xname); 3531 break; 3532 } 3533 if (m0->m_pkthdr.len > MHLEN) { 3534 MCLGET(m, M_DONTWAIT); 3535 if ((m->m_flags & M_EXT) == 0) { 3536 printf("%s: unable to allocate Tx " 3537 "cluster\n", sc->sc_dev.dv_xname); 3538 m_freem(m); 3539 break; 3540 } 3541 } 3542 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 3543 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 3544 m_freem(m0); 3545 m0 = m; 3546 m = NULL; 3547 } 3548 if (error != 0) { 3549 printf("%s: unable to load Tx buffer, " 3550 "error = %d\n", sc->sc_dev.dv_xname, error); 3551 m_freem(m0); 3552 break; 3553 } 3554 3555 /* 3556 * Ensure we have enough descriptors free to describe 3557 * the packet. 3558 */ 3559 if (dmamap->dm_nsegs > sc->sc_txfree) { 3560 /* 3561 * Not enough free descriptors to transmit 3562 * this packet. Unload the DMA map and 3563 * drop the packet. Notify the upper layer 3564 * that there are no more slots left. 3565 * 3566 * XXX We could allocate an mbuf and copy, but 3567 * XXX it is worth it? 3568 */ 3569 ifp->if_flags |= IFF_OACTIVE; 3570 bus_dmamap_unload(sc->sc_dmat, dmamap); 3571 m_freem(m0); 3572 break; 3573 } 3574 3575 /* 3576 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 3577 */ 3578 3579 /* Sync the DMA map. */ 3580 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 3581 BUS_DMASYNC_PREWRITE); 3582 3583 /* XXX arbitrary retry limit; 8 because I have seen it in 3584 * use already and maybe 0 means "no tries" ! 3585 */ 3586 ctl = htole32(LSHIFT(8, ATW_TXCTL_TL_MASK)); 3587 3588 DPRINTF2(sc, ("%s: TXDR <- max(10, %d)\n", 3589 sc->sc_dev.dv_xname, rate * 5)); 3590 ctl |= htole32(LSHIFT(MAX(10, rate * 5), ATW_TXCTL_TXDR_MASK)); 3591 3592 /* 3593 * Initialize the transmit descriptors. 3594 */ 3595 for (nexttx = sc->sc_txnext, seg = 0; 3596 seg < dmamap->dm_nsegs; 3597 seg++, nexttx = ATW_NEXTTX(nexttx)) { 3598 /* 3599 * If this is the first descriptor we're 3600 * enqueueing, don't set the OWN bit just 3601 * yet. That could cause a race condition. 3602 * We'll do it below. 3603 */ 3604 txd = &sc->sc_txdescs[nexttx]; 3605 txd->at_ctl = ctl | 3606 ((nexttx == firsttx) ? 0 : htole32(ATW_TXCTL_OWN)); 3607 3608 txd->at_buf1 = htole32(dmamap->dm_segs[seg].ds_addr); 3609 txd->at_flags = 3610 htole32(LSHIFT(dmamap->dm_segs[seg].ds_len, 3611 ATW_TXFLAG_TBS1_MASK)) | 3612 ((nexttx == (ATW_NTXDESC - 1)) 3613 ? htole32(ATW_TXFLAG_TER) : 0); 3614 lasttx = nexttx; 3615 } 3616 3617 IASSERT(lasttx != -1, ("bad lastx")); 3618 /* Set `first segment' and `last segment' appropriately. */ 3619 sc->sc_txdescs[sc->sc_txnext].at_flags |= 3620 htole32(ATW_TXFLAG_FS); 3621 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_LS); 3622 3623 #ifdef ATW_DEBUG 3624 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3625 printf(" txsoft %p transmit chain:\n", txs); 3626 for (seg = sc->sc_txnext;; seg = ATW_NEXTTX(seg)) { 3627 printf(" descriptor %d:\n", seg); 3628 printf(" at_ctl: 0x%08x\n", 3629 le32toh(sc->sc_txdescs[seg].at_ctl)); 3630 printf(" at_flags: 0x%08x\n", 3631 le32toh(sc->sc_txdescs[seg].at_flags)); 3632 printf(" at_buf1: 0x%08x\n", 3633 le32toh(sc->sc_txdescs[seg].at_buf1)); 3634 printf(" at_buf2: 0x%08x\n", 3635 le32toh(sc->sc_txdescs[seg].at_buf2)); 3636 if (seg == lasttx) 3637 break; 3638 } 3639 } 3640 #endif 3641 3642 /* Sync the descriptors we're using. */ 3643 ATW_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 3644 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3645 3646 /* 3647 * Store a pointer to the packet so we can free it later, 3648 * and remember what txdirty will be once the packet is 3649 * done. 3650 */ 3651 txs->txs_mbuf = m0; 3652 txs->txs_firstdesc = sc->sc_txnext; 3653 txs->txs_lastdesc = lasttx; 3654 txs->txs_ndescs = dmamap->dm_nsegs; 3655 3656 /* Advance the tx pointer. */ 3657 sc->sc_txfree -= dmamap->dm_nsegs; 3658 sc->sc_txnext = nexttx; 3659 3660 SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 3661 SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 3662 3663 last_txs = txs; 3664 } 3665 3666 if (txs == NULL || sc->sc_txfree == 0) { 3667 /* No more slots left; notify upper layer. */ 3668 ifp->if_flags |= IFF_OACTIVE; 3669 } 3670 3671 if (sc->sc_txfree != ofree) { 3672 DPRINTF2(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", 3673 sc->sc_dev.dv_xname, lasttx, firsttx)); 3674 /* 3675 * Cause a transmit interrupt to happen on the 3676 * last packet we enqueued. 3677 */ 3678 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_IC); 3679 ATW_CDTXSYNC(sc, lasttx, 1, 3680 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3681 3682 /* 3683 * The entire packet chain is set up. Give the 3684 * first descriptor to the chip now. 3685 */ 3686 sc->sc_txdescs[firsttx].at_ctl |= htole32(ATW_TXCTL_OWN); 3687 ATW_CDTXSYNC(sc, firsttx, 1, 3688 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3689 3690 /* Wake up the transmitter. */ 3691 ATW_WRITE(sc, ATW_TDR, 0x1); 3692 3693 /* Set a watchdog timer in case the chip flakes out. */ 3694 sc->sc_tx_timer = 5; 3695 ifp->if_timer = 1; 3696 } 3697 } 3698 3699 /* 3700 * atw_power: 3701 * 3702 * Power management (suspend/resume) hook. 3703 */ 3704 void 3705 atw_power(int why, void *arg) 3706 { 3707 struct atw_softc *sc = arg; 3708 struct ifnet *ifp = &sc->sc_ic.ic_if; 3709 int s; 3710 3711 DPRINTF(sc, ("%s: atw_power(%d,)\n", sc->sc_dev.dv_xname, why)); 3712 3713 s = splnet(); 3714 switch (why) { 3715 case PWR_STANDBY: 3716 /* XXX do nothing. */ 3717 break; 3718 case PWR_SUSPEND: 3719 atw_stop(ifp, 0); 3720 if (sc->sc_power != NULL) 3721 (*sc->sc_power)(sc, why); 3722 break; 3723 case PWR_RESUME: 3724 if (ifp->if_flags & IFF_UP) { 3725 if (sc->sc_power != NULL) 3726 (*sc->sc_power)(sc, why); 3727 atw_init(ifp); 3728 } 3729 break; 3730 case PWR_SOFTSUSPEND: 3731 case PWR_SOFTSTANDBY: 3732 case PWR_SOFTRESUME: 3733 break; 3734 } 3735 splx(s); 3736 } 3737 3738 /* 3739 * atw_ioctl: [ifnet interface function] 3740 * 3741 * Handle control requests from the operator. 3742 */ 3743 int 3744 atw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 3745 { 3746 struct atw_softc *sc = ifp->if_softc; 3747 struct ifreq *ifr = (struct ifreq *)data; 3748 int s, error = 0; 3749 3750 /* XXX monkey see, monkey do. comes from wi_ioctl. */ 3751 if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0) 3752 return ENXIO; 3753 3754 s = splnet(); 3755 3756 switch (cmd) { 3757 case SIOCSIFFLAGS: 3758 if (ifp->if_flags & IFF_UP) { 3759 if (ATW_IS_ENABLED(sc)) { 3760 /* 3761 * To avoid rescanning another access point, 3762 * do not call atw_init() here. Instead, 3763 * only reflect media settings. 3764 */ 3765 atw_filter_setup(sc); 3766 } else 3767 error = atw_init(ifp); 3768 } else if (ATW_IS_ENABLED(sc)) 3769 atw_stop(ifp, 1); 3770 break; 3771 case SIOCADDMULTI: 3772 case SIOCDELMULTI: 3773 error = (cmd == SIOCADDMULTI) ? 3774 ether_addmulti(ifr, &sc->sc_ic.ic_ec) : 3775 ether_delmulti(ifr, &sc->sc_ic.ic_ec); 3776 if (error == ENETRESET) { 3777 if (ATW_IS_ENABLED(sc)) 3778 atw_filter_setup(sc); /* do not rescan */ 3779 error = 0; 3780 } 3781 break; 3782 default: 3783 error = ieee80211_ioctl(ifp, cmd, data); 3784 if (error == ENETRESET) { 3785 if (ATW_IS_ENABLED(sc)) 3786 error = atw_init(ifp); 3787 else 3788 error = 0; 3789 } 3790 break; 3791 } 3792 3793 /* Try to get more packets going. */ 3794 if (ATW_IS_ENABLED(sc)) 3795 atw_start(ifp); 3796 3797 splx(s); 3798 return (error); 3799 } 3800 3801 static int 3802 atw_media_change(struct ifnet *ifp) 3803 { 3804 int error; 3805 3806 error = ieee80211_media_change(ifp); 3807 if (error == ENETRESET) { 3808 if ((ifp->if_flags & (IFF_RUNNING|IFF_UP)) == 3809 (IFF_RUNNING|IFF_UP)) 3810 atw_init(ifp); /* XXX lose error */ 3811 error = 0; 3812 } 3813 return error; 3814 } 3815 3816 static void 3817 atw_media_status(struct ifnet *ifp, struct ifmediareq *imr) 3818 { 3819 struct atw_softc *sc = ifp->if_softc; 3820 3821 if (ATW_IS_ENABLED(sc) == 0) { 3822 imr->ifm_active = IFM_IEEE80211 | IFM_NONE; 3823 imr->ifm_status = 0; 3824 return; 3825 } 3826 ieee80211_media_status(ifp, imr); 3827 } 3828
Indexes created Fri Sep 26 20:09:58 GMT 2025