Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/atw.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $NetBSD: atw.c,v 1.125 2006/11/24 19:46:59 christos 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 1.125 2006/11/24 19:46:59 christos 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 #include <lib/libkern/libkern.h> 60 61 #include <machine/endian.h> 62 63 #include <uvm/uvm_extern.h> 64 65 #include <net/if.h> 66 #include <net/if_dl.h> 67 #include <net/if_media.h> 68 #include <net/if_ether.h> 69 70 #include <net80211/ieee80211_netbsd.h> 71 #include <net80211/ieee80211_var.h> 72 #include <net80211/ieee80211_radiotap.h> 73 74 #if NBPFILTER > 0 75 #include <net/bpf.h> 76 #endif 77 78 #include <machine/bus.h> 79 #include <machine/intr.h> 80 81 #include <dev/ic/atwreg.h> 82 #include <dev/ic/rf3000reg.h> 83 #include <dev/ic/si4136reg.h> 84 #include <dev/ic/atwvar.h> 85 #include <dev/ic/smc93cx6var.h> 86 87 /* XXX TBD open questions 88 * 89 * 90 * When should I set DSSS PAD in reg 0x15 of RF3000? In 1-2Mbps 91 * modes only, or all modes (5.5-11 Mbps CCK modes, too?) Does the MAC 92 * handle this for me? 93 * 94 */ 95 /* device attachment 96 * 97 * print TOFS[012] 98 * 99 * device initialization 100 * 101 * clear ATW_FRCTL_MAXPSP to disable max power saving 102 * set ATW_TXBR_ALCUPDATE to enable ALC 103 * set TOFS[012]? (hope not) 104 * disable rx/tx 105 * set ATW_PAR_SWR (software reset) 106 * wait for ATW_PAR_SWR clear 107 * disable interrupts 108 * ack status register 109 * enable interrupts 110 * 111 * rx/tx initialization 112 * 113 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 114 * allocate and init descriptor rings 115 * write ATW_PAR_DSL (descriptor skip length) 116 * write descriptor base addrs: ATW_TDBD, ATW_TDBP, write ATW_RDB 117 * write ATW_NAR_SQ for one/both transmit descriptor rings 118 * write ATW_NAR_SQ for one/both transmit descriptor rings 119 * enable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 120 * 121 * rx/tx end 122 * 123 * stop DMA 124 * disable rx/tx w/ ATW_NAR_SR, ATW_NAR_ST 125 * flush tx w/ ATW_NAR_HF 126 * 127 * scan 128 * 129 * initialize rx/tx 130 * 131 * BSS join: (re)association response 132 * 133 * set ATW_FRCTL_AID 134 * 135 * optimizations ??? 136 * 137 */ 138 139 #define ATW_REFSLAVE /* slavishly do what the reference driver does */ 140 141 #define VOODOO_DUR_11_ROUNDING 0x01 /* necessary */ 142 #define VOODOO_DUR_2_4_SPECIALCASE 0x02 /* NOT necessary */ 143 int atw_voodoo = VOODOO_DUR_11_ROUNDING; 144 145 int atw_pseudo_milli = 1; 146 int atw_magic_delay1 = 100 * 1000; 147 int atw_magic_delay2 = 100 * 1000; 148 /* more magic multi-millisecond delays (units: microseconds) */ 149 int atw_nar_delay = 20 * 1000; 150 int atw_magic_delay4 = 10 * 1000; 151 int atw_rf_delay1 = 10 * 1000; 152 int atw_rf_delay2 = 5 * 1000; 153 int atw_plcphd_delay = 2 * 1000; 154 int atw_bbp_io_enable_delay = 20 * 1000; 155 int atw_bbp_io_disable_delay = 2 * 1000; 156 int atw_writewep_delay = 1000; 157 int atw_beacon_len_adjust = 4; 158 int atw_dwelltime = 200; 159 int atw_xindiv2 = 0; 160 161 #ifdef ATW_DEBUG 162 int atw_debug = 0; 163 164 #define ATW_DPRINTF(x) if (atw_debug > 0) printf x 165 #define ATW_DPRINTF2(x) if (atw_debug > 1) printf x 166 #define ATW_DPRINTF3(x) if (atw_debug > 2) printf x 167 #define DPRINTF(sc, x) if ((sc)->sc_if.if_flags & IFF_DEBUG) printf x 168 #define DPRINTF2(sc, x) if ((sc)->sc_if.if_flags & IFF_DEBUG) ATW_DPRINTF2(x) 169 #define DPRINTF3(sc, x) if ((sc)->sc_if.if_flags & IFF_DEBUG) ATW_DPRINTF3(x) 170 171 static void atw_dump_pkt(struct ifnet *, struct mbuf *); 172 static void atw_print_regs(struct atw_softc *, const char *); 173 174 /* Note well: I never got atw_rf3000_read or atw_si4126_read to work. */ 175 # ifdef ATW_BBPDEBUG 176 static void atw_rf3000_print(struct atw_softc *); 177 static int atw_rf3000_read(struct atw_softc *sc, u_int, u_int *); 178 # endif /* ATW_BBPDEBUG */ 179 180 # ifdef ATW_SYNDEBUG 181 static void atw_si4126_print(struct atw_softc *); 182 static int atw_si4126_read(struct atw_softc *, u_int, u_int *); 183 # endif /* ATW_SYNDEBUG */ 184 185 #else 186 #define ATW_DPRINTF(x) 187 #define ATW_DPRINTF2(x) 188 #define ATW_DPRINTF3(x) 189 #define DPRINTF(sc, x) /* nothing */ 190 #define DPRINTF2(sc, x) /* nothing */ 191 #define DPRINTF3(sc, x) /* nothing */ 192 #endif 193 194 /* ifnet methods */ 195 int atw_init(struct ifnet *); 196 int atw_ioctl(struct ifnet *, u_long, caddr_t); 197 void atw_start(struct ifnet *); 198 void atw_stop(struct ifnet *, int); 199 void atw_watchdog(struct ifnet *); 200 201 /* Device attachment */ 202 void atw_attach(struct atw_softc *); 203 int atw_detach(struct atw_softc *); 204 205 /* Rx/Tx process */ 206 int atw_add_rxbuf(struct atw_softc *, int); 207 void atw_idle(struct atw_softc *, u_int32_t); 208 void atw_rxdrain(struct atw_softc *); 209 void atw_txdrain(struct atw_softc *); 210 211 /* Device (de)activation and power state */ 212 void atw_disable(struct atw_softc *); 213 int atw_enable(struct atw_softc *); 214 void atw_power(int, void *); 215 void atw_reset(struct atw_softc *); 216 void atw_shutdown(void *); 217 218 /* Interrupt handlers */ 219 void atw_linkintr(struct atw_softc *, u_int32_t); 220 void atw_rxintr(struct atw_softc *); 221 void atw_txintr(struct atw_softc *); 222 223 /* 802.11 state machine */ 224 static int atw_newstate(struct ieee80211com *, enum ieee80211_state, int); 225 static void atw_next_scan(void *); 226 static void atw_recv_mgmt(struct ieee80211com *, struct mbuf *, 227 struct ieee80211_node *, int, int, u_int32_t); 228 static int atw_tune(struct atw_softc *); 229 230 /* Device initialization */ 231 static void atw_bbp_io_init(struct atw_softc *); 232 static void atw_cfp_init(struct atw_softc *); 233 static void atw_cmdr_init(struct atw_softc *); 234 static void atw_ifs_init(struct atw_softc *); 235 static void atw_nar_init(struct atw_softc *); 236 static void atw_response_times_init(struct atw_softc *); 237 static void atw_rf_reset(struct atw_softc *); 238 static void atw_test1_init(struct atw_softc *); 239 static void atw_tofs0_init(struct atw_softc *); 240 static void atw_tofs2_init(struct atw_softc *); 241 static void atw_txlmt_init(struct atw_softc *); 242 static void atw_wcsr_init(struct atw_softc *); 243 244 /* Key management */ 245 static int atw_key_delete(struct ieee80211com *, const struct ieee80211_key *); 246 static int atw_key_set(struct ieee80211com *, const struct ieee80211_key *, 247 const u_int8_t[IEEE80211_ADDR_LEN]); 248 static void atw_key_update_begin(struct ieee80211com *); 249 static void atw_key_update_end(struct ieee80211com *); 250 251 /* RAM/ROM utilities */ 252 static void atw_clear_sram(struct atw_softc *); 253 static void atw_write_sram(struct atw_softc *, u_int, u_int8_t *, u_int); 254 static int atw_read_srom(struct atw_softc *); 255 256 /* BSS setup */ 257 static void atw_predict_beacon(struct atw_softc *); 258 static void atw_start_beacon(struct atw_softc *, int); 259 static void atw_write_bssid(struct atw_softc *); 260 static void atw_write_ssid(struct atw_softc *); 261 static void atw_write_sup_rates(struct atw_softc *); 262 static void atw_write_wep(struct atw_softc *); 263 264 /* Media */ 265 static int atw_media_change(struct ifnet *); 266 267 static void atw_filter_setup(struct atw_softc *); 268 269 /* 802.11 utilities */ 270 static uint64_t atw_get_tsft(struct atw_softc *); 271 static inline uint32_t atw_last_even_tsft(uint32_t, uint32_t, 272 uint32_t); 273 static struct ieee80211_node *atw_node_alloc(struct ieee80211_node_table *); 274 static void atw_node_free(struct ieee80211_node *); 275 276 /* 277 * Tuner/transceiver/modem 278 */ 279 static void atw_bbp_io_enable(struct atw_softc *, int); 280 281 /* RFMD RF3000 Baseband Processor */ 282 static int atw_rf3000_init(struct atw_softc *); 283 static int atw_rf3000_tune(struct atw_softc *, u_int); 284 static int atw_rf3000_write(struct atw_softc *, u_int, u_int); 285 286 /* Silicon Laboratories Si4126 RF/IF Synthesizer */ 287 static void atw_si4126_tune(struct atw_softc *, u_int); 288 static void atw_si4126_write(struct atw_softc *, u_int, u_int); 289 290 const struct atw_txthresh_tab atw_txthresh_tab_lo[] = ATW_TXTHRESH_TAB_LO_RATE; 291 const struct atw_txthresh_tab atw_txthresh_tab_hi[] = ATW_TXTHRESH_TAB_HI_RATE; 292 293 const char *atw_tx_state[] = { 294 "STOPPED", 295 "RUNNING - read descriptor", 296 "RUNNING - transmitting", 297 "RUNNING - filling fifo", /* XXX */ 298 "SUSPENDED", 299 "RUNNING -- write descriptor", 300 "RUNNING -- write last descriptor", 301 "RUNNING - fifo full" 302 }; 303 304 const char *atw_rx_state[] = { 305 "STOPPED", 306 "RUNNING - read descriptor", 307 "RUNNING - check this packet, pre-fetch next", 308 "RUNNING - wait for reception", 309 "SUSPENDED", 310 "RUNNING - write descriptor", 311 "RUNNING - flush fifo", 312 "RUNNING - fifo drain" 313 }; 314 315 static inline int 316 is_running(struct ifnet *ifp) 317 { 318 return (ifp->if_flags & (IFF_RUNNING|IFF_UP)) == (IFF_RUNNING|IFF_UP); 319 } 320 321 int 322 atw_activate(struct device *self, enum devact act) 323 { 324 struct atw_softc *sc = (struct atw_softc *)self; 325 int rv = 0, s; 326 327 s = splnet(); 328 switch (act) { 329 case DVACT_ACTIVATE: 330 rv = EOPNOTSUPP; 331 break; 332 333 case DVACT_DEACTIVATE: 334 if_deactivate(&sc->sc_if); 335 break; 336 } 337 splx(s); 338 return rv; 339 } 340 341 /* 342 * atw_enable: 343 * 344 * Enable the ADM8211 chip. 345 */ 346 int 347 atw_enable(struct atw_softc *sc) 348 { 349 350 if (ATW_IS_ENABLED(sc) == 0) { 351 if (sc->sc_enable != NULL && (*sc->sc_enable)(sc) != 0) { 352 printf("%s: device enable failed\n", 353 sc->sc_dev.dv_xname); 354 return (EIO); 355 } 356 sc->sc_flags |= ATWF_ENABLED; 357 /* Power may have been removed, and WEP keys thus 358 * reset. 359 */ 360 sc->sc_flags &= ~ATWF_WEP_SRAM_VALID; 361 } 362 return (0); 363 } 364 365 /* 366 * atw_disable: 367 * 368 * Disable the ADM8211 chip. 369 */ 370 void 371 atw_disable(struct atw_softc *sc) 372 { 373 if (!ATW_IS_ENABLED(sc)) 374 return; 375 if (sc->sc_disable != NULL) 376 (*sc->sc_disable)(sc); 377 sc->sc_flags &= ~ATWF_ENABLED; 378 } 379 380 /* Returns -1 on failure. */ 381 static int 382 atw_read_srom(struct atw_softc *sc) 383 { 384 struct seeprom_descriptor sd; 385 uint32_t test0, fail_bits; 386 387 (void)memset(&sd, 0, sizeof(sd)); 388 389 test0 = ATW_READ(sc, ATW_TEST0); 390 391 switch (sc->sc_rev) { 392 case ATW_REVISION_BA: 393 case ATW_REVISION_CA: 394 fail_bits = ATW_TEST0_EPNE; 395 break; 396 default: 397 fail_bits = ATW_TEST0_EPNE|ATW_TEST0_EPSNM; 398 break; 399 } 400 if ((test0 & fail_bits) != 0) { 401 printf("%s: bad or missing/bad SROM\n", sc->sc_dev.dv_xname); 402 return -1; 403 } 404 405 switch (test0 & ATW_TEST0_EPTYP_MASK) { 406 case ATW_TEST0_EPTYP_93c66: 407 ATW_DPRINTF(("%s: 93c66 SROM\n", sc->sc_dev.dv_xname)); 408 sc->sc_sromsz = 512; 409 sd.sd_chip = C56_66; 410 break; 411 case ATW_TEST0_EPTYP_93c46: 412 ATW_DPRINTF(("%s: 93c46 SROM\n", sc->sc_dev.dv_xname)); 413 sc->sc_sromsz = 128; 414 sd.sd_chip = C46; 415 break; 416 default: 417 printf("%s: unknown SROM type %" __PRIuBITS "\n", 418 sc->sc_dev.dv_xname, 419 __SHIFTOUT(test0, ATW_TEST0_EPTYP_MASK)); 420 return -1; 421 } 422 423 sc->sc_srom = malloc(sc->sc_sromsz, M_DEVBUF, M_NOWAIT); 424 425 if (sc->sc_srom == NULL) { 426 printf("%s: unable to allocate SROM buffer\n", 427 sc->sc_dev.dv_xname); 428 return -1; 429 } 430 431 (void)memset(sc->sc_srom, 0, sc->sc_sromsz); 432 433 /* ADM8211 has a single 32-bit register for controlling the 434 * 93cx6 SROM. Bit SRS enables the serial port. There is no 435 * "ready" bit. The ADM8211 input/output sense is the reverse 436 * of read_seeprom's. 437 */ 438 sd.sd_tag = sc->sc_st; 439 sd.sd_bsh = sc->sc_sh; 440 sd.sd_regsize = 4; 441 sd.sd_control_offset = ATW_SPR; 442 sd.sd_status_offset = ATW_SPR; 443 sd.sd_dataout_offset = ATW_SPR; 444 sd.sd_CK = ATW_SPR_SCLK; 445 sd.sd_CS = ATW_SPR_SCS; 446 sd.sd_DI = ATW_SPR_SDO; 447 sd.sd_DO = ATW_SPR_SDI; 448 sd.sd_MS = ATW_SPR_SRS; 449 sd.sd_RDY = 0; 450 451 if (!read_seeprom(&sd, sc->sc_srom, 0, sc->sc_sromsz/2)) { 452 printf("%s: could not read SROM\n", sc->sc_dev.dv_xname); 453 free(sc->sc_srom, M_DEVBUF); 454 return -1; 455 } 456 #ifdef ATW_DEBUG 457 { 458 int i; 459 ATW_DPRINTF(("\nSerial EEPROM:\n\t")); 460 for (i = 0; i < sc->sc_sromsz/2; i = i + 1) { 461 if (((i % 8) == 0) && (i != 0)) { 462 ATW_DPRINTF(("\n\t")); 463 } 464 ATW_DPRINTF((" 0x%x", sc->sc_srom[i])); 465 } 466 ATW_DPRINTF(("\n")); 467 } 468 #endif /* ATW_DEBUG */ 469 return 0; 470 } 471 472 #ifdef ATW_DEBUG 473 static void 474 atw_print_regs(struct atw_softc *sc, const char *where) 475 { 476 #define PRINTREG(sc, reg) \ 477 ATW_DPRINTF2(("%s: reg[ " #reg " / %03x ] = %08x\n", \ 478 sc->sc_dev.dv_xname, reg, ATW_READ(sc, reg))) 479 480 ATW_DPRINTF2(("%s: %s\n", sc->sc_dev.dv_xname, where)); 481 482 PRINTREG(sc, ATW_PAR); 483 PRINTREG(sc, ATW_FRCTL); 484 PRINTREG(sc, ATW_TDR); 485 PRINTREG(sc, ATW_WTDP); 486 PRINTREG(sc, ATW_RDR); 487 PRINTREG(sc, ATW_WRDP); 488 PRINTREG(sc, ATW_RDB); 489 PRINTREG(sc, ATW_CSR3A); 490 PRINTREG(sc, ATW_TDBD); 491 PRINTREG(sc, ATW_TDBP); 492 PRINTREG(sc, ATW_STSR); 493 PRINTREG(sc, ATW_CSR5A); 494 PRINTREG(sc, ATW_NAR); 495 PRINTREG(sc, ATW_CSR6A); 496 PRINTREG(sc, ATW_IER); 497 PRINTREG(sc, ATW_CSR7A); 498 PRINTREG(sc, ATW_LPC); 499 PRINTREG(sc, ATW_TEST1); 500 PRINTREG(sc, ATW_SPR); 501 PRINTREG(sc, ATW_TEST0); 502 PRINTREG(sc, ATW_WCSR); 503 PRINTREG(sc, ATW_WPDR); 504 PRINTREG(sc, ATW_GPTMR); 505 PRINTREG(sc, ATW_GPIO); 506 PRINTREG(sc, ATW_BBPCTL); 507 PRINTREG(sc, ATW_SYNCTL); 508 PRINTREG(sc, ATW_PLCPHD); 509 PRINTREG(sc, ATW_MMIWADDR); 510 PRINTREG(sc, ATW_MMIRADDR1); 511 PRINTREG(sc, ATW_MMIRADDR2); 512 PRINTREG(sc, ATW_TXBR); 513 PRINTREG(sc, ATW_CSR15A); 514 PRINTREG(sc, ATW_ALCSTAT); 515 PRINTREG(sc, ATW_TOFS2); 516 PRINTREG(sc, ATW_CMDR); 517 PRINTREG(sc, ATW_PCIC); 518 PRINTREG(sc, ATW_PMCSR); 519 PRINTREG(sc, ATW_PAR0); 520 PRINTREG(sc, ATW_PAR1); 521 PRINTREG(sc, ATW_MAR0); 522 PRINTREG(sc, ATW_MAR1); 523 PRINTREG(sc, ATW_ATIMDA0); 524 PRINTREG(sc, ATW_ABDA1); 525 PRINTREG(sc, ATW_BSSID0); 526 PRINTREG(sc, ATW_TXLMT); 527 PRINTREG(sc, ATW_MIBCNT); 528 PRINTREG(sc, ATW_BCNT); 529 PRINTREG(sc, ATW_TSFTH); 530 PRINTREG(sc, ATW_TSC); 531 PRINTREG(sc, ATW_SYNRF); 532 PRINTREG(sc, ATW_BPLI); 533 PRINTREG(sc, ATW_CAP0); 534 PRINTREG(sc, ATW_CAP1); 535 PRINTREG(sc, ATW_RMD); 536 PRINTREG(sc, ATW_CFPP); 537 PRINTREG(sc, ATW_TOFS0); 538 PRINTREG(sc, ATW_TOFS1); 539 PRINTREG(sc, ATW_IFST); 540 PRINTREG(sc, ATW_RSPT); 541 PRINTREG(sc, ATW_TSFTL); 542 PRINTREG(sc, ATW_WEPCTL); 543 PRINTREG(sc, ATW_WESK); 544 PRINTREG(sc, ATW_WEPCNT); 545 PRINTREG(sc, ATW_MACTEST); 546 PRINTREG(sc, ATW_FER); 547 PRINTREG(sc, ATW_FEMR); 548 PRINTREG(sc, ATW_FPSR); 549 PRINTREG(sc, ATW_FFER); 550 #undef PRINTREG 551 } 552 #endif /* ATW_DEBUG */ 553 554 /* 555 * Finish attaching an ADMtek ADM8211 MAC. Called by bus-specific front-end. 556 */ 557 void 558 atw_attach(struct atw_softc *sc) 559 { 560 static const u_int8_t empty_macaddr[IEEE80211_ADDR_LEN] = { 561 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 562 }; 563 struct ieee80211com *ic = &sc->sc_ic; 564 struct ifnet *ifp = &sc->sc_if; 565 int country_code, error, i, nrate, srom_major; 566 u_int32_t reg; 567 static const char *type_strings[] = {"Intersil (not supported)", 568 "RFMD", "Marvel (not supported)"}; 569 570 sc->sc_txth = atw_txthresh_tab_lo; 571 572 SIMPLEQ_INIT(&sc->sc_txfreeq); 573 SIMPLEQ_INIT(&sc->sc_txdirtyq); 574 575 #ifdef ATW_DEBUG 576 atw_print_regs(sc, "atw_attach"); 577 #endif /* ATW_DEBUG */ 578 579 /* 580 * Allocate the control data structures, and create and load the 581 * DMA map for it. 582 */ 583 if ((error = bus_dmamem_alloc(sc->sc_dmat, 584 sizeof(struct atw_control_data), PAGE_SIZE, 0, &sc->sc_cdseg, 585 1, &sc->sc_cdnseg, 0)) != 0) { 586 printf("%s: unable to allocate control data, error = %d\n", 587 sc->sc_dev.dv_xname, error); 588 goto fail_0; 589 } 590 591 if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg, 592 sizeof(struct atw_control_data), (caddr_t *)&sc->sc_control_data, 593 BUS_DMA_COHERENT)) != 0) { 594 printf("%s: unable to map control data, error = %d\n", 595 sc->sc_dev.dv_xname, error); 596 goto fail_1; 597 } 598 599 if ((error = bus_dmamap_create(sc->sc_dmat, 600 sizeof(struct atw_control_data), 1, 601 sizeof(struct atw_control_data), 0, 0, &sc->sc_cddmamap)) != 0) { 602 printf("%s: unable to create control data DMA map, " 603 "error = %d\n", sc->sc_dev.dv_xname, error); 604 goto fail_2; 605 } 606 607 if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap, 608 sc->sc_control_data, sizeof(struct atw_control_data), NULL, 609 0)) != 0) { 610 printf("%s: unable to load control data DMA map, error = %d\n", 611 sc->sc_dev.dv_xname, error); 612 goto fail_3; 613 } 614 615 /* 616 * Create the transmit buffer DMA maps. 617 */ 618 sc->sc_ntxsegs = ATW_NTXSEGS; 619 for (i = 0; i < ATW_TXQUEUELEN; i++) { 620 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 621 sc->sc_ntxsegs, MCLBYTES, 0, 0, 622 &sc->sc_txsoft[i].txs_dmamap)) != 0) { 623 printf("%s: unable to create tx DMA map %d, " 624 "error = %d\n", sc->sc_dev.dv_xname, i, error); 625 goto fail_4; 626 } 627 } 628 629 /* 630 * Create the receive buffer DMA maps. 631 */ 632 for (i = 0; i < ATW_NRXDESC; i++) { 633 if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1, 634 MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) { 635 printf("%s: unable to create rx DMA map %d, " 636 "error = %d\n", sc->sc_dev.dv_xname, i, error); 637 goto fail_5; 638 } 639 } 640 for (i = 0; i < ATW_NRXDESC; i++) { 641 sc->sc_rxsoft[i].rxs_mbuf = NULL; 642 } 643 644 switch (sc->sc_rev) { 645 case ATW_REVISION_AB: 646 case ATW_REVISION_AF: 647 sc->sc_sramlen = ATW_SRAM_A_SIZE; 648 break; 649 case ATW_REVISION_BA: 650 case ATW_REVISION_CA: 651 sc->sc_sramlen = ATW_SRAM_B_SIZE; 652 break; 653 } 654 655 /* Reset the chip to a known state. */ 656 atw_reset(sc); 657 658 if (atw_read_srom(sc) == -1) 659 return; 660 661 sc->sc_rftype = __SHIFTOUT(sc->sc_srom[ATW_SR_CSR20], 662 ATW_SR_RFTYPE_MASK); 663 664 sc->sc_bbptype = __SHIFTOUT(sc->sc_srom[ATW_SR_CSR20], 665 ATW_SR_BBPTYPE_MASK); 666 667 if (sc->sc_rftype >= __arraycount(type_strings)) { 668 printf("%s: unknown RF\n", sc->sc_dev.dv_xname); 669 return; 670 } 671 if (sc->sc_bbptype >= __arraycount(type_strings)) { 672 printf("%s: unknown BBP\n", sc->sc_dev.dv_xname); 673 return; 674 } 675 676 printf("%s: %s RF, %s BBP", sc->sc_dev.dv_xname, 677 type_strings[sc->sc_rftype], type_strings[sc->sc_bbptype]); 678 679 /* XXX There exists a Linux driver which seems to use RFType = 0 for 680 * MARVEL. My bug, or theirs? 681 */ 682 683 reg = __SHIFTIN(sc->sc_rftype, ATW_SYNCTL_RFTYPE_MASK); 684 685 switch (sc->sc_rftype) { 686 case ATW_RFTYPE_INTERSIL: 687 reg |= ATW_SYNCTL_CS1; 688 break; 689 case ATW_RFTYPE_RFMD: 690 reg |= ATW_SYNCTL_CS0; 691 break; 692 case ATW_RFTYPE_MARVEL: 693 break; 694 } 695 696 sc->sc_synctl_rd = reg | ATW_SYNCTL_RD; 697 sc->sc_synctl_wr = reg | ATW_SYNCTL_WR; 698 699 reg = __SHIFTIN(sc->sc_bbptype, ATW_BBPCTL_TYPE_MASK); 700 701 switch (sc->sc_bbptype) { 702 case ATW_BBPTYPE_INTERSIL: 703 reg |= ATW_BBPCTL_TWI; 704 break; 705 case ATW_BBPTYPE_RFMD: 706 reg |= ATW_BBPCTL_RF3KADDR_ADDR | ATW_BBPCTL_NEGEDGE_DO | 707 ATW_BBPCTL_CCA_ACTLO; 708 break; 709 case ATW_BBPTYPE_MARVEL: 710 break; 711 case ATW_C_BBPTYPE_RFMD: 712 printf("%s: ADM8211C MAC/RFMD BBP not supported yet.\n", 713 sc->sc_dev.dv_xname); 714 break; 715 } 716 717 sc->sc_bbpctl_wr = reg | ATW_BBPCTL_WR; 718 sc->sc_bbpctl_rd = reg | ATW_BBPCTL_RD; 719 720 /* 721 * From this point forward, the attachment cannot fail. A failure 722 * before this point releases all resources that may have been 723 * allocated. 724 */ 725 sc->sc_flags |= ATWF_ATTACHED /* | ATWF_RTSCTS */; 726 727 ATW_DPRINTF((" SROM MAC %04x%04x%04x", 728 htole16(sc->sc_srom[ATW_SR_MAC00]), 729 htole16(sc->sc_srom[ATW_SR_MAC01]), 730 htole16(sc->sc_srom[ATW_SR_MAC10]))); 731 732 srom_major = __SHIFTOUT(sc->sc_srom[ATW_SR_FORMAT_VERSION], 733 ATW_SR_MAJOR_MASK); 734 735 if (srom_major < 2) 736 sc->sc_rf3000_options1 = 0; 737 else if (sc->sc_rev == ATW_REVISION_BA) { 738 sc->sc_rf3000_options1 = 739 __SHIFTOUT(sc->sc_srom[ATW_SR_CR28_CR03], 740 ATW_SR_CR28_MASK); 741 } else 742 sc->sc_rf3000_options1 = 0; 743 744 sc->sc_rf3000_options2 = __SHIFTOUT(sc->sc_srom[ATW_SR_CTRY_CR29], 745 ATW_SR_CR29_MASK); 746 747 country_code = __SHIFTOUT(sc->sc_srom[ATW_SR_CTRY_CR29], 748 ATW_SR_CTRY_MASK); 749 750 #define ADD_CHANNEL(_ic, _chan) do { \ 751 _ic->ic_channels[_chan].ic_flags = IEEE80211_CHAN_B; \ 752 _ic->ic_channels[_chan].ic_freq = \ 753 ieee80211_ieee2mhz(_chan, _ic->ic_channels[_chan].ic_flags);\ 754 } while (0) 755 756 /* Find available channels */ 757 switch (country_code) { 758 case COUNTRY_MMK2: /* 1-14 */ 759 ADD_CHANNEL(ic, 14); 760 /*FALLTHROUGH*/ 761 case COUNTRY_ETSI: /* 1-13 */ 762 for (i = 1; i <= 13; i++) 763 ADD_CHANNEL(ic, i); 764 break; 765 case COUNTRY_FCC: /* 1-11 */ 766 case COUNTRY_IC: /* 1-11 */ 767 for (i = 1; i <= 11; i++) 768 ADD_CHANNEL(ic, i); 769 break; 770 case COUNTRY_MMK: /* 14 */ 771 ADD_CHANNEL(ic, 14); 772 break; 773 case COUNTRY_FRANCE: /* 10-13 */ 774 for (i = 10; i <= 13; i++) 775 ADD_CHANNEL(ic, i); 776 break; 777 default: /* assume channels 10-11 */ 778 case COUNTRY_SPAIN: /* 10-11 */ 779 for (i = 10; i <= 11; i++) 780 ADD_CHANNEL(ic, i); 781 break; 782 } 783 784 /* Read the MAC address. */ 785 reg = ATW_READ(sc, ATW_PAR0); 786 ic->ic_myaddr[0] = __SHIFTOUT(reg, ATW_PAR0_PAB0_MASK); 787 ic->ic_myaddr[1] = __SHIFTOUT(reg, ATW_PAR0_PAB1_MASK); 788 ic->ic_myaddr[2] = __SHIFTOUT(reg, ATW_PAR0_PAB2_MASK); 789 ic->ic_myaddr[3] = __SHIFTOUT(reg, ATW_PAR0_PAB3_MASK); 790 reg = ATW_READ(sc, ATW_PAR1); 791 ic->ic_myaddr[4] = __SHIFTOUT(reg, ATW_PAR1_PAB4_MASK); 792 ic->ic_myaddr[5] = __SHIFTOUT(reg, ATW_PAR1_PAB5_MASK); 793 794 if (IEEE80211_ADDR_EQ(ic->ic_myaddr, empty_macaddr)) { 795 printf(" could not get mac address, attach failed\n"); 796 return; 797 } 798 799 printf(" 802.11 address %s\n", ether_sprintf(ic->ic_myaddr)); 800 801 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 802 ifp->if_softc = sc; 803 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST | 804 IFF_NOTRAILERS; 805 ifp->if_ioctl = atw_ioctl; 806 ifp->if_start = atw_start; 807 ifp->if_watchdog = atw_watchdog; 808 ifp->if_init = atw_init; 809 ifp->if_stop = atw_stop; 810 IFQ_SET_READY(&ifp->if_snd); 811 812 ic->ic_ifp = ifp; 813 ic->ic_phytype = IEEE80211_T_DS; 814 ic->ic_opmode = IEEE80211_M_STA; 815 ic->ic_caps = IEEE80211_C_PMGT | IEEE80211_C_IBSS | 816 IEEE80211_C_HOSTAP | IEEE80211_C_MONITOR; 817 818 nrate = 0; 819 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 2; 820 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 4; 821 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 11; 822 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_rates[nrate++] = 22; 823 ic->ic_sup_rates[IEEE80211_MODE_11B].rs_nrates = nrate; 824 825 /* 826 * Call MI attach routines. 827 */ 828 829 if_attach(ifp); 830 ieee80211_ifattach(ic); 831 832 sc->sc_newstate = ic->ic_newstate; 833 ic->ic_newstate = atw_newstate; 834 835 sc->sc_recv_mgmt = ic->ic_recv_mgmt; 836 ic->ic_recv_mgmt = atw_recv_mgmt; 837 838 sc->sc_node_free = ic->ic_node_free; 839 ic->ic_node_free = atw_node_free; 840 841 sc->sc_node_alloc = ic->ic_node_alloc; 842 ic->ic_node_alloc = atw_node_alloc; 843 844 ic->ic_crypto.cs_key_delete = atw_key_delete; 845 ic->ic_crypto.cs_key_set = atw_key_set; 846 ic->ic_crypto.cs_key_update_begin = atw_key_update_begin; 847 ic->ic_crypto.cs_key_update_end = atw_key_update_end; 848 849 /* possibly we should fill in our own sc_send_prresp, since 850 * the ADM8211 is probably sending probe responses in ad hoc 851 * mode. 852 */ 853 854 /* complete initialization */ 855 ieee80211_media_init(ic, atw_media_change, ieee80211_media_status); 856 callout_init(&sc->sc_scan_ch); 857 858 #if NBPFILTER > 0 859 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 860 sizeof(struct ieee80211_frame) + 64, &sc->sc_radiobpf); 861 #endif 862 863 /* 864 * Make sure the interface is shutdown during reboot. 865 */ 866 sc->sc_sdhook = shutdownhook_establish(atw_shutdown, sc); 867 if (sc->sc_sdhook == NULL) 868 printf("%s: WARNING: unable to establish shutdown hook\n", 869 sc->sc_dev.dv_xname); 870 871 /* 872 * Add a suspend hook to make sure we come back up after a 873 * resume. 874 */ 875 sc->sc_powerhook = powerhook_establish(sc->sc_dev.dv_xname, 876 atw_power, sc); 877 if (sc->sc_powerhook == NULL) 878 printf("%s: WARNING: unable to establish power hook\n", 879 sc->sc_dev.dv_xname); 880 881 memset(&sc->sc_rxtapu, 0, sizeof(sc->sc_rxtapu)); 882 sc->sc_rxtap.ar_ihdr.it_len = htole16(sizeof(sc->sc_rxtapu)); 883 sc->sc_rxtap.ar_ihdr.it_present = htole32(ATW_RX_RADIOTAP_PRESENT); 884 885 memset(&sc->sc_txtapu, 0, sizeof(sc->sc_txtapu)); 886 sc->sc_txtap.at_ihdr.it_len = htole16(sizeof(sc->sc_txtapu)); 887 sc->sc_txtap.at_ihdr.it_present = htole32(ATW_TX_RADIOTAP_PRESENT); 888 889 ieee80211_announce(ic); 890 return; 891 892 /* 893 * Free any resources we've allocated during the failed attach 894 * attempt. Do this in reverse order and fall through. 895 */ 896 fail_5: 897 for (i = 0; i < ATW_NRXDESC; i++) { 898 if (sc->sc_rxsoft[i].rxs_dmamap == NULL) 899 continue; 900 bus_dmamap_destroy(sc->sc_dmat, sc->sc_rxsoft[i].rxs_dmamap); 901 } 902 fail_4: 903 for (i = 0; i < ATW_TXQUEUELEN; i++) { 904 if (sc->sc_txsoft[i].txs_dmamap == NULL) 905 continue; 906 bus_dmamap_destroy(sc->sc_dmat, sc->sc_txsoft[i].txs_dmamap); 907 } 908 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 909 fail_3: 910 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 911 fail_2: 912 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 913 sizeof(struct atw_control_data)); 914 fail_1: 915 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 916 fail_0: 917 return; 918 } 919 920 static struct ieee80211_node * 921 atw_node_alloc(struct ieee80211_node_table *nt) 922 { 923 struct atw_softc *sc = (struct atw_softc *)nt->nt_ic->ic_ifp->if_softc; 924 struct ieee80211_node *ni = (*sc->sc_node_alloc)(nt); 925 926 DPRINTF(sc, ("%s: alloc node %p\n", sc->sc_dev.dv_xname, ni)); 927 return ni; 928 } 929 930 static void 931 atw_node_free(struct ieee80211_node *ni) 932 { 933 struct atw_softc *sc = (struct atw_softc *)ni->ni_ic->ic_ifp->if_softc; 934 935 DPRINTF(sc, ("%s: freeing node %p %s\n", sc->sc_dev.dv_xname, ni, 936 ether_sprintf(ni->ni_bssid))); 937 (*sc->sc_node_free)(ni); 938 } 939 940 941 static void 942 atw_test1_reset(struct atw_softc *sc) 943 { 944 switch (sc->sc_rev) { 945 case ATW_REVISION_BA: 946 if (1 /* XXX condition on transceiver type */) { 947 ATW_SET(sc, ATW_TEST1, ATW_TEST1_TESTMODE_MONITOR); 948 } 949 break; 950 case ATW_REVISION_CA: 951 ATW_CLR(sc, ATW_TEST1, ATW_TEST1_TESTMODE_MASK); 952 break; 953 default: 954 break; 955 } 956 } 957 958 /* 959 * atw_reset: 960 * 961 * Perform a soft reset on the ADM8211. 962 */ 963 void 964 atw_reset(struct atw_softc *sc) 965 { 966 int i; 967 uint32_t lpc; 968 969 ATW_WRITE(sc, ATW_NAR, 0x0); 970 DELAY(atw_nar_delay); 971 972 /* Reference driver has a cryptic remark indicating that this might 973 * power-on the chip. I know that it turns off power-saving.... 974 */ 975 ATW_WRITE(sc, ATW_FRCTL, 0x0); 976 977 ATW_WRITE(sc, ATW_PAR, ATW_PAR_SWR); 978 979 for (i = 0; i < 50000 / atw_pseudo_milli; i++) { 980 if ((ATW_READ(sc, ATW_PAR) & ATW_PAR_SWR) == 0) 981 break; 982 DELAY(atw_pseudo_milli); 983 } 984 985 /* ... and then pause 100ms longer for good measure. */ 986 DELAY(atw_magic_delay1); 987 988 DPRINTF2(sc, ("%s: atw_reset %d iterations\n", sc->sc_dev.dv_xname, i)); 989 990 if (ATW_ISSET(sc, ATW_PAR, ATW_PAR_SWR)) 991 printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname); 992 993 /* 994 * Initialize the PCI Access Register. 995 */ 996 sc->sc_busmode = ATW_PAR_PBL_8DW; 997 998 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 999 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1000 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1001 1002 atw_test1_reset(sc); 1003 1004 /* Turn off maximum power saving, etc. */ 1005 ATW_WRITE(sc, ATW_FRCTL, 0x0); 1006 1007 DELAY(atw_magic_delay2); 1008 1009 /* Recall EEPROM. */ 1010 ATW_SET(sc, ATW_TEST0, ATW_TEST0_EPRLD); 1011 1012 DELAY(atw_magic_delay4); 1013 1014 lpc = ATW_READ(sc, ATW_LPC); 1015 1016 DPRINTF(sc, ("%s: ATW_LPC %#08x\n", __func__, lpc)); 1017 1018 /* A reset seems to affect the SRAM contents, so put them into 1019 * a known state. 1020 */ 1021 atw_clear_sram(sc); 1022 1023 memset(sc->sc_bssid, 0xff, sizeof(sc->sc_bssid)); 1024 } 1025 1026 static void 1027 atw_clear_sram(struct atw_softc *sc) 1028 { 1029 memset(sc->sc_sram, 0, sizeof(sc->sc_sram)); 1030 sc->sc_flags &= ~ATWF_WEP_SRAM_VALID; 1031 /* XXX not for revision 0x20. */ 1032 atw_write_sram(sc, 0, sc->sc_sram, sc->sc_sramlen); 1033 } 1034 1035 /* TBD atw_init 1036 * 1037 * set MAC based on ic->ic_bss->myaddr 1038 * write WEP keys 1039 * set TX rate 1040 */ 1041 1042 /* Tell the ADM8211 to raise ATW_INTR_LINKOFF if 7 beacon intervals pass 1043 * without receiving a beacon with the preferred BSSID & SSID. 1044 * atw_write_bssid & atw_write_ssid set the BSSID & SSID. 1045 */ 1046 static void 1047 atw_wcsr_init(struct atw_softc *sc) 1048 { 1049 uint32_t wcsr; 1050 1051 wcsr = ATW_READ(sc, ATW_WCSR); 1052 wcsr &= ~(ATW_WCSR_BLN_MASK|ATW_WCSR_LSOE|ATW_WCSR_MPRE|ATW_WCSR_LSOE); 1053 wcsr |= __SHIFTIN(7, ATW_WCSR_BLN_MASK); 1054 ATW_WRITE(sc, ATW_WCSR, wcsr); /* XXX resets wake-up status bits */ 1055 1056 DPRINTF(sc, ("%s: %s reg[WCSR] = %08x\n", 1057 sc->sc_dev.dv_xname, __func__, ATW_READ(sc, ATW_WCSR))); 1058 } 1059 1060 /* Turn off power management. Set Rx store-and-forward mode. */ 1061 static void 1062 atw_cmdr_init(struct atw_softc *sc) 1063 { 1064 uint32_t cmdr; 1065 cmdr = ATW_READ(sc, ATW_CMDR); 1066 cmdr &= ~ATW_CMDR_APM; 1067 cmdr |= ATW_CMDR_RTE; 1068 cmdr &= ~ATW_CMDR_DRT_MASK; 1069 cmdr |= ATW_CMDR_DRT_SF; 1070 1071 ATW_WRITE(sc, ATW_CMDR, cmdr); 1072 } 1073 1074 static void 1075 atw_tofs2_init(struct atw_softc *sc) 1076 { 1077 uint32_t tofs2; 1078 /* XXX this magic can probably be figured out from the RFMD docs */ 1079 #ifndef ATW_REFSLAVE 1080 tofs2 = __SHIFTIN(4, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 1081 __SHIFTIN(13, ATW_TOFS2_PWR0PAPE_MASK) | /* 13 us */ 1082 __SHIFTIN(8, ATW_TOFS2_PWR1PAPE_MASK) | /* 8 us */ 1083 __SHIFTIN(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 1084 __SHIFTIN(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 1085 __SHIFTIN(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 1086 __SHIFTIN(4, ATW_TOFS2_PWR1PE2_MASK) | /* 4 us */ 1087 __SHIFTIN(5, ATW_TOFS2_PWR0TXPE_MASK); /* 5 us */ 1088 #else 1089 /* XXX new magic from reference driver source */ 1090 tofs2 = __SHIFTIN(8, ATW_TOFS2_PWR1UP_MASK) | /* 8 ms = 4 * 2 ms */ 1091 __SHIFTIN(8, ATW_TOFS2_PWR0PAPE_MASK) | /* 8 us */ 1092 __SHIFTIN(1, ATW_TOFS2_PWR1PAPE_MASK) | /* 1 us */ 1093 __SHIFTIN(5, ATW_TOFS2_PWR0TRSW_MASK) | /* 5 us */ 1094 __SHIFTIN(12, ATW_TOFS2_PWR1TRSW_MASK) | /* 12 us */ 1095 __SHIFTIN(13, ATW_TOFS2_PWR0PE2_MASK) | /* 13 us */ 1096 __SHIFTIN(1, ATW_TOFS2_PWR1PE2_MASK) | /* 1 us */ 1097 __SHIFTIN(8, ATW_TOFS2_PWR0TXPE_MASK); /* 8 us */ 1098 #endif 1099 ATW_WRITE(sc, ATW_TOFS2, tofs2); 1100 } 1101 1102 static void 1103 atw_nar_init(struct atw_softc *sc) 1104 { 1105 ATW_WRITE(sc, ATW_NAR, ATW_NAR_SF|ATW_NAR_PB); 1106 } 1107 1108 static void 1109 atw_txlmt_init(struct atw_softc *sc) 1110 { 1111 ATW_WRITE(sc, ATW_TXLMT, __SHIFTIN(512, ATW_TXLMT_MTMLT_MASK) | 1112 __SHIFTIN(1, ATW_TXLMT_SRTYLIM_MASK)); 1113 } 1114 1115 static void 1116 atw_test1_init(struct atw_softc *sc) 1117 { 1118 uint32_t test1; 1119 1120 test1 = ATW_READ(sc, ATW_TEST1); 1121 test1 &= ~(ATW_TEST1_DBGREAD_MASK|ATW_TEST1_CONTROL); 1122 /* XXX magic 0x1 */ 1123 test1 |= __SHIFTIN(0x1, ATW_TEST1_DBGREAD_MASK) | ATW_TEST1_CONTROL; 1124 ATW_WRITE(sc, ATW_TEST1, test1); 1125 } 1126 1127 static void 1128 atw_rf_reset(struct atw_softc *sc) 1129 { 1130 /* XXX this resets an Intersil RF front-end? */ 1131 /* TBD condition on Intersil RFType? */ 1132 ATW_WRITE(sc, ATW_SYNRF, ATW_SYNRF_INTERSIL_EN); 1133 DELAY(atw_rf_delay1); 1134 ATW_WRITE(sc, ATW_SYNRF, 0); 1135 DELAY(atw_rf_delay2); 1136 } 1137 1138 /* Set 16 TU max duration for the contention-free period (CFP). */ 1139 static void 1140 atw_cfp_init(struct atw_softc *sc) 1141 { 1142 uint32_t cfpp; 1143 1144 cfpp = ATW_READ(sc, ATW_CFPP); 1145 cfpp &= ~ATW_CFPP_CFPMD; 1146 cfpp |= __SHIFTIN(16, ATW_CFPP_CFPMD); 1147 ATW_WRITE(sc, ATW_CFPP, cfpp); 1148 } 1149 1150 static void 1151 atw_tofs0_init(struct atw_softc *sc) 1152 { 1153 /* XXX I guess that the Cardbus clock is 22 MHz? 1154 * I am assuming that the role of ATW_TOFS0_USCNT is 1155 * to divide the bus clock to get a 1 MHz clock---the datasheet is not 1156 * very clear on this point. It says in the datasheet that it is 1157 * possible for the ADM8211 to accommodate bus speeds between 22 MHz 1158 * and 33 MHz; maybe this is the way? I see a binary-only driver write 1159 * these values. These values are also the power-on default. 1160 */ 1161 ATW_WRITE(sc, ATW_TOFS0, 1162 __SHIFTIN(22, ATW_TOFS0_USCNT_MASK) | 1163 ATW_TOFS0_TUCNT_MASK /* set all bits in TUCNT */); 1164 } 1165 1166 /* Initialize interframe spacing: 802.11b slot time, SIFS, DIFS, EIFS. */ 1167 static void 1168 atw_ifs_init(struct atw_softc *sc) 1169 { 1170 uint32_t ifst; 1171 /* XXX EIFS=0x64, SIFS=110 are used by the reference driver. 1172 * Go figure. 1173 */ 1174 ifst = __SHIFTIN(IEEE80211_DUR_DS_SLOT, ATW_IFST_SLOT_MASK) | 1175 __SHIFTIN(22 * 5 /* IEEE80211_DUR_DS_SIFS */ /* # of 22 MHz cycles */, 1176 ATW_IFST_SIFS_MASK) | 1177 __SHIFTIN(IEEE80211_DUR_DS_DIFS, ATW_IFST_DIFS_MASK) | 1178 __SHIFTIN(0x64 /* IEEE80211_DUR_DS_EIFS */, ATW_IFST_EIFS_MASK); 1179 1180 ATW_WRITE(sc, ATW_IFST, ifst); 1181 } 1182 1183 static void 1184 atw_response_times_init(struct atw_softc *sc) 1185 { 1186 /* XXX More magic. Relates to ACK timing? The datasheet seems to 1187 * indicate that the MAC expects at least SIFS + MIRT microseconds 1188 * to pass after it transmits a frame that requires a response; 1189 * it waits at most SIFS + MART microseconds for the response. 1190 * Surely this is not the ACK timeout? 1191 */ 1192 ATW_WRITE(sc, ATW_RSPT, __SHIFTIN(0xffff, ATW_RSPT_MART_MASK) | 1193 __SHIFTIN(0xff, ATW_RSPT_MIRT_MASK)); 1194 } 1195 1196 /* Set up the MMI read/write addresses for the baseband. The Tx/Rx 1197 * engines read and write baseband registers after Rx and before 1198 * Tx, respectively. 1199 */ 1200 static void 1201 atw_bbp_io_init(struct atw_softc *sc) 1202 { 1203 uint32_t mmiraddr2; 1204 1205 /* XXX The reference driver does this, but is it *really* 1206 * necessary? 1207 */ 1208 switch (sc->sc_rev) { 1209 case ATW_REVISION_AB: 1210 case ATW_REVISION_AF: 1211 mmiraddr2 = 0x0; 1212 break; 1213 default: 1214 mmiraddr2 = ATW_READ(sc, ATW_MMIRADDR2); 1215 mmiraddr2 &= 1216 ~(ATW_MMIRADDR2_PROREXT|ATW_MMIRADDR2_PRORLEN_MASK); 1217 break; 1218 } 1219 1220 switch (sc->sc_bbptype) { 1221 case ATW_BBPTYPE_INTERSIL: 1222 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_INTERSIL); 1223 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_INTERSIL); 1224 mmiraddr2 |= ATW_MMIRADDR2_INTERSIL; 1225 break; 1226 case ATW_BBPTYPE_MARVEL: 1227 /* TBD find out the Marvel settings. */ 1228 break; 1229 case ATW_BBPTYPE_RFMD: 1230 default: 1231 ATW_WRITE(sc, ATW_MMIWADDR, ATW_MMIWADDR_RFMD); 1232 ATW_WRITE(sc, ATW_MMIRADDR1, ATW_MMIRADDR1_RFMD); 1233 mmiraddr2 |= ATW_MMIRADDR2_RFMD; 1234 break; 1235 } 1236 ATW_WRITE(sc, ATW_MMIRADDR2, mmiraddr2); 1237 ATW_WRITE(sc, ATW_MACTEST, ATW_MACTEST_MMI_USETXCLK); 1238 } 1239 1240 /* 1241 * atw_init: [ ifnet interface function ] 1242 * 1243 * Initialize the interface. Must be called at splnet(). 1244 */ 1245 int 1246 atw_init(struct ifnet *ifp) 1247 { 1248 struct atw_softc *sc = ifp->if_softc; 1249 struct ieee80211com *ic = &sc->sc_ic; 1250 struct atw_txsoft *txs; 1251 struct atw_rxsoft *rxs; 1252 int i, error = 0; 1253 1254 if ((error = atw_enable(sc)) != 0) 1255 goto out; 1256 1257 /* 1258 * Cancel any pending I/O. This also resets. 1259 */ 1260 atw_stop(ifp, 0); 1261 1262 DPRINTF(sc, ("%s: channel %d freq %d flags 0x%04x\n", 1263 __func__, ieee80211_chan2ieee(ic, ic->ic_curchan), 1264 ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags)); 1265 1266 atw_wcsr_init(sc); 1267 1268 atw_cmdr_init(sc); 1269 1270 /* Set data rate for PLCP Signal field, 1Mbps = 10 x 100Kb/s. 1271 * 1272 * XXX Set transmit power for ATIM, RTS, Beacon. 1273 */ 1274 ATW_WRITE(sc, ATW_PLCPHD, __SHIFTIN(10, ATW_PLCPHD_SIGNAL_MASK) | 1275 __SHIFTIN(0xb0, ATW_PLCPHD_SERVICE_MASK)); 1276 1277 atw_tofs2_init(sc); 1278 1279 atw_nar_init(sc); 1280 1281 atw_txlmt_init(sc); 1282 1283 atw_test1_init(sc); 1284 1285 atw_rf_reset(sc); 1286 1287 atw_cfp_init(sc); 1288 1289 atw_tofs0_init(sc); 1290 1291 atw_ifs_init(sc); 1292 1293 /* XXX Fall asleep after one second of inactivity. 1294 * XXX A frame may only dribble in for 65536us. 1295 */ 1296 ATW_WRITE(sc, ATW_RMD, 1297 __SHIFTIN(1, ATW_RMD_PCNT) | __SHIFTIN(0xffff, ATW_RMD_RMRD_MASK)); 1298 1299 atw_response_times_init(sc); 1300 1301 atw_bbp_io_init(sc); 1302 1303 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1304 1305 if ((error = atw_rf3000_init(sc)) != 0) 1306 goto out; 1307 1308 ATW_WRITE(sc, ATW_PAR, sc->sc_busmode); 1309 DPRINTF(sc, ("%s: ATW_PAR %08x busmode %08x\n", sc->sc_dev.dv_xname, 1310 ATW_READ(sc, ATW_PAR), sc->sc_busmode)); 1311 1312 /* 1313 * Initialize the transmit descriptor ring. 1314 */ 1315 memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs)); 1316 for (i = 0; i < ATW_NTXDESC; i++) { 1317 sc->sc_txdescs[i].at_ctl = 0; 1318 /* no transmit chaining */ 1319 sc->sc_txdescs[i].at_flags = 0 /* ATW_TXFLAG_TCH */; 1320 sc->sc_txdescs[i].at_buf2 = 1321 htole32(ATW_CDTXADDR(sc, ATW_NEXTTX(i))); 1322 } 1323 /* use ring mode */ 1324 sc->sc_txdescs[ATW_NTXDESC - 1].at_flags |= htole32(ATW_TXFLAG_TER); 1325 ATW_CDTXSYNC(sc, 0, ATW_NTXDESC, 1326 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 1327 sc->sc_txfree = ATW_NTXDESC; 1328 sc->sc_txnext = 0; 1329 1330 /* 1331 * Initialize the transmit job descriptors. 1332 */ 1333 SIMPLEQ_INIT(&sc->sc_txfreeq); 1334 SIMPLEQ_INIT(&sc->sc_txdirtyq); 1335 for (i = 0; i < ATW_TXQUEUELEN; i++) { 1336 txs = &sc->sc_txsoft[i]; 1337 txs->txs_mbuf = NULL; 1338 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 1339 } 1340 1341 /* 1342 * Initialize the receive descriptor and receive job 1343 * descriptor rings. 1344 */ 1345 for (i = 0; i < ATW_NRXDESC; i++) { 1346 rxs = &sc->sc_rxsoft[i]; 1347 if (rxs->rxs_mbuf == NULL) { 1348 if ((error = atw_add_rxbuf(sc, i)) != 0) { 1349 printf("%s: unable to allocate or map rx " 1350 "buffer %d, error = %d\n", 1351 sc->sc_dev.dv_xname, i, error); 1352 /* 1353 * XXX Should attempt to run with fewer receive 1354 * XXX buffers instead of just failing. 1355 */ 1356 atw_rxdrain(sc); 1357 goto out; 1358 } 1359 } else 1360 ATW_INIT_RXDESC(sc, i); 1361 } 1362 sc->sc_rxptr = 0; 1363 1364 /* 1365 * Initialize the interrupt mask and enable interrupts. 1366 */ 1367 /* normal interrupts */ 1368 sc->sc_inten = ATW_INTR_TCI | ATW_INTR_TDU | ATW_INTR_RCI | 1369 ATW_INTR_NISS | ATW_INTR_LINKON | ATW_INTR_BCNTC; 1370 1371 /* abnormal interrupts */ 1372 sc->sc_inten |= ATW_INTR_TPS | ATW_INTR_TLT | ATW_INTR_TRT | 1373 ATW_INTR_TUF | ATW_INTR_RDU | ATW_INTR_RPS | ATW_INTR_AISS | 1374 ATW_INTR_FBE | ATW_INTR_LINKOFF | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1375 1376 sc->sc_linkint_mask = ATW_INTR_LINKON | ATW_INTR_LINKOFF | 1377 ATW_INTR_BCNTC | ATW_INTR_TSFTF | ATW_INTR_TSCZ; 1378 sc->sc_rxint_mask = ATW_INTR_RCI | ATW_INTR_RDU; 1379 sc->sc_txint_mask = ATW_INTR_TCI | ATW_INTR_TUF | ATW_INTR_TLT | 1380 ATW_INTR_TRT; 1381 1382 sc->sc_linkint_mask &= sc->sc_inten; 1383 sc->sc_rxint_mask &= sc->sc_inten; 1384 sc->sc_txint_mask &= sc->sc_inten; 1385 1386 ATW_WRITE(sc, ATW_IER, sc->sc_inten); 1387 ATW_WRITE(sc, ATW_STSR, 0xffffffff); 1388 1389 DPRINTF(sc, ("%s: ATW_IER %08x, inten %08x\n", 1390 sc->sc_dev.dv_xname, ATW_READ(sc, ATW_IER), sc->sc_inten)); 1391 1392 /* 1393 * Give the transmit and receive rings to the ADM8211. 1394 */ 1395 ATW_WRITE(sc, ATW_RDB, ATW_CDRXADDR(sc, sc->sc_rxptr)); 1396 ATW_WRITE(sc, ATW_TDBD, ATW_CDTXADDR(sc, sc->sc_txnext)); 1397 1398 sc->sc_txthresh = 0; 1399 sc->sc_opmode = ATW_NAR_SR | ATW_NAR_ST | 1400 sc->sc_txth[sc->sc_txthresh].txth_opmode; 1401 1402 /* common 802.11 configuration */ 1403 ic->ic_flags &= ~IEEE80211_F_IBSSON; 1404 switch (ic->ic_opmode) { 1405 case IEEE80211_M_STA: 1406 break; 1407 case IEEE80211_M_AHDEMO: /* XXX */ 1408 case IEEE80211_M_IBSS: 1409 ic->ic_flags |= IEEE80211_F_IBSSON; 1410 /*FALLTHROUGH*/ 1411 case IEEE80211_M_HOSTAP: /* XXX */ 1412 break; 1413 case IEEE80211_M_MONITOR: /* XXX */ 1414 break; 1415 } 1416 1417 switch (ic->ic_opmode) { 1418 case IEEE80211_M_AHDEMO: 1419 case IEEE80211_M_HOSTAP: 1420 #ifndef IEEE80211_NO_HOSTAP 1421 ic->ic_bss->ni_intval = ic->ic_lintval; 1422 ic->ic_bss->ni_rssi = 0; 1423 ic->ic_bss->ni_rstamp = 0; 1424 #endif /* !IEEE80211_NO_HOSTAP */ 1425 break; 1426 default: /* XXX */ 1427 break; 1428 } 1429 1430 sc->sc_wepctl = 0; 1431 1432 atw_write_ssid(sc); 1433 atw_write_sup_rates(sc); 1434 atw_write_wep(sc); 1435 1436 ic->ic_state = IEEE80211_S_INIT; 1437 1438 /* 1439 * Set the receive filter. This will start the transmit and 1440 * receive processes. 1441 */ 1442 atw_filter_setup(sc); 1443 1444 /* 1445 * Start the receive process. 1446 */ 1447 ATW_WRITE(sc, ATW_RDR, 0x1); 1448 1449 /* 1450 * Note that the interface is now running. 1451 */ 1452 ifp->if_flags |= IFF_RUNNING; 1453 ifp->if_flags &= ~IFF_OACTIVE; 1454 1455 /* send no beacons, yet. */ 1456 atw_start_beacon(sc, 0); 1457 1458 if (ic->ic_opmode == IEEE80211_M_MONITOR) 1459 error = ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 1460 else 1461 error = ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 1462 out: 1463 if (error) { 1464 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 1465 sc->sc_tx_timer = 0; 1466 ifp->if_timer = 0; 1467 printf("%s: interface not running\n", sc->sc_dev.dv_xname); 1468 } 1469 #ifdef ATW_DEBUG 1470 atw_print_regs(sc, "end of init"); 1471 #endif /* ATW_DEBUG */ 1472 1473 return (error); 1474 } 1475 1476 /* enable == 1: host control of RF3000/Si4126 through ATW_SYNCTL. 1477 * 0: MAC control of RF3000/Si4126. 1478 * 1479 * Applies power, or selects RF front-end? Sets reset condition. 1480 * 1481 * TBD support non-RFMD BBP, non-SiLabs synth. 1482 */ 1483 static void 1484 atw_bbp_io_enable(struct atw_softc *sc, int enable) 1485 { 1486 if (enable) { 1487 ATW_WRITE(sc, ATW_SYNRF, 1488 ATW_SYNRF_SELRF|ATW_SYNRF_PE1|ATW_SYNRF_PHYRST); 1489 DELAY(atw_bbp_io_enable_delay); 1490 } else { 1491 ATW_WRITE(sc, ATW_SYNRF, 0); 1492 DELAY(atw_bbp_io_disable_delay); /* shorter for some reason */ 1493 } 1494 } 1495 1496 static int 1497 atw_tune(struct atw_softc *sc) 1498 { 1499 int rc; 1500 u_int chan; 1501 struct ieee80211com *ic = &sc->sc_ic; 1502 1503 chan = ieee80211_chan2ieee(ic, ic->ic_curchan); 1504 if (chan == IEEE80211_CHAN_ANY) 1505 panic("%s: chan == IEEE80211_CHAN_ANY\n", __func__); 1506 1507 if (chan == sc->sc_cur_chan) 1508 return 0; 1509 1510 DPRINTF(sc, ("%s: chan %d -> %d\n", sc->sc_dev.dv_xname, 1511 sc->sc_cur_chan, chan)); 1512 1513 atw_idle(sc, ATW_NAR_SR|ATW_NAR_ST); 1514 1515 atw_si4126_tune(sc, chan); 1516 if ((rc = atw_rf3000_tune(sc, chan)) != 0) 1517 printf("%s: failed to tune channel %d\n", sc->sc_dev.dv_xname, 1518 chan); 1519 1520 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 1521 DELAY(atw_nar_delay); 1522 ATW_WRITE(sc, ATW_RDR, 0x1); 1523 1524 if (rc == 0) 1525 sc->sc_cur_chan = chan; 1526 1527 return rc; 1528 } 1529 1530 #ifdef ATW_SYNDEBUG 1531 static void 1532 atw_si4126_print(struct atw_softc *sc) 1533 { 1534 struct ifnet *ifp = &sc->sc_if; 1535 u_int addr, val; 1536 1537 val = 0; 1538 1539 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1540 return; 1541 1542 for (addr = 0; addr <= 8; addr++) { 1543 printf("%s: synth[%d] = ", sc->sc_dev.dv_xname, addr); 1544 if (atw_si4126_read(sc, addr, &val) == 0) { 1545 printf("<unknown> (quitting print-out)\n"); 1546 break; 1547 } 1548 printf("%05x\n", val); 1549 } 1550 } 1551 #endif /* ATW_SYNDEBUG */ 1552 1553 /* Tune to channel chan by adjusting the Si4126 RF/IF synthesizer. 1554 * 1555 * The RF/IF synthesizer produces two reference frequencies for 1556 * the RF2948B transceiver. The first frequency the RF2948B requires 1557 * is two times the so-called "intermediate frequency" (IF). Since 1558 * a SAW filter on the radio fixes the IF at 374 MHz, I program the 1559 * Si4126 to generate IF LO = 374 MHz x 2 = 748 MHz. The second 1560 * frequency required by the transceiver is the radio frequency 1561 * (RF). This is a superheterodyne transceiver; for f(chan) the 1562 * center frequency of the channel we are tuning, RF = f(chan) - 1563 * IF. 1564 * 1565 * XXX I am told by SiLabs that the Si4126 will accept a broader range 1566 * of XIN than the 2-25 MHz mentioned by the datasheet, even *without* 1567 * XINDIV2 = 1. I've tried this (it is necessary to double R) and it 1568 * works, but I have still programmed for XINDIV2 = 1 to be safe. 1569 */ 1570 static void 1571 atw_si4126_tune(struct atw_softc *sc, u_int chan) 1572 { 1573 u_int mhz; 1574 u_int R; 1575 u_int32_t gpio; 1576 u_int16_t gain; 1577 1578 #ifdef ATW_SYNDEBUG 1579 atw_si4126_print(sc); 1580 #endif /* ATW_SYNDEBUG */ 1581 1582 if (chan == 14) 1583 mhz = 2484; 1584 else 1585 mhz = 2412 + 5 * (chan - 1); 1586 1587 /* Tune IF to 748 MHz to suit the IF LO input of the 1588 * RF2494B, which is 2 x IF. No need to set an IF divider 1589 * because an IF in 526 MHz - 952 MHz is allowed. 1590 * 1591 * XIN is 44.000 MHz, so divide it by two to get allowable 1592 * range of 2-25 MHz. SiLabs tells me that this is not 1593 * strictly necessary. 1594 */ 1595 1596 if (atw_xindiv2) 1597 R = 44; 1598 else 1599 R = 88; 1600 1601 /* Power-up RF, IF synthesizers. */ 1602 atw_si4126_write(sc, SI4126_POWER, 1603 SI4126_POWER_PDIB|SI4126_POWER_PDRB); 1604 1605 /* set LPWR, too? */ 1606 atw_si4126_write(sc, SI4126_MAIN, 1607 (atw_xindiv2) ? SI4126_MAIN_XINDIV2 : 0); 1608 1609 /* Set the phase-locked loop gain. If RF2 N > 2047, then 1610 * set KP2 to 1. 1611 * 1612 * REFDIF This is different from the reference driver, which 1613 * always sets SI4126_GAIN to 0. 1614 */ 1615 gain = __SHIFTIN(((mhz - 374) > 2047) ? 1 : 0, SI4126_GAIN_KP2_MASK); 1616 1617 atw_si4126_write(sc, SI4126_GAIN, gain); 1618 1619 /* XIN = 44 MHz. 1620 * 1621 * If XINDIV2 = 1, IF = N/(2 * R) * XIN. I choose N = 1496, 1622 * R = 44 so that 1496/(2 * 44) * 44 MHz = 748 MHz. 1623 * 1624 * If XINDIV2 = 0, IF = N/R * XIN. I choose N = 1496, R = 88 1625 * so that 1496/88 * 44 MHz = 748 MHz. 1626 */ 1627 atw_si4126_write(sc, SI4126_IFN, 1496); 1628 1629 atw_si4126_write(sc, SI4126_IFR, R); 1630 1631 #ifndef ATW_REFSLAVE 1632 /* Set RF1 arbitrarily. DO NOT configure RF1 after RF2, because 1633 * then RF1 becomes the active RF synthesizer, even on the Si4126, 1634 * which has no RF1! 1635 */ 1636 atw_si4126_write(sc, SI4126_RF1R, R); 1637 1638 atw_si4126_write(sc, SI4126_RF1N, mhz - 374); 1639 #endif 1640 1641 /* N/R * XIN = RF. XIN = 44 MHz. We desire RF = mhz - IF, 1642 * where IF = 374 MHz. Let's divide XIN to 1 MHz. So R = 44. 1643 * Now let's multiply it to mhz. So mhz - IF = N. 1644 */ 1645 atw_si4126_write(sc, SI4126_RF2R, R); 1646 1647 atw_si4126_write(sc, SI4126_RF2N, mhz - 374); 1648 1649 /* wait 100us from power-up for RF, IF to settle */ 1650 DELAY(100); 1651 1652 gpio = ATW_READ(sc, ATW_GPIO); 1653 gpio &= ~(ATW_GPIO_EN_MASK|ATW_GPIO_O_MASK|ATW_GPIO_I_MASK); 1654 gpio |= __SHIFTIN(1, ATW_GPIO_EN_MASK); 1655 1656 if ((sc->sc_if.if_flags & IFF_LINK1) != 0 && chan != 14) { 1657 /* Set a Prism RF front-end to a special mode for channel 14? 1658 * 1659 * Apparently the SMC2635W needs this, although I don't think 1660 * it has a Prism RF. 1661 */ 1662 gpio |= __SHIFTIN(1, ATW_GPIO_O_MASK); 1663 } 1664 ATW_WRITE(sc, ATW_GPIO, gpio); 1665 1666 #ifdef ATW_SYNDEBUG 1667 atw_si4126_print(sc); 1668 #endif /* ATW_SYNDEBUG */ 1669 } 1670 1671 /* Baseline initialization of RF3000 BBP: set CCA mode and enable antenna 1672 * diversity. 1673 * 1674 * !!! 1675 * !!! Call this w/ Tx/Rx suspended, atw_idle(, ATW_NAR_ST|ATW_NAR_SR). 1676 * !!! 1677 */ 1678 static int 1679 atw_rf3000_init(struct atw_softc *sc) 1680 { 1681 int rc = 0; 1682 1683 atw_bbp_io_enable(sc, 1); 1684 1685 /* CCA is acquisition sensitive */ 1686 rc = atw_rf3000_write(sc, RF3000_CCACTL, 1687 __SHIFTIN(RF3000_CCACTL_MODE_BOTH, RF3000_CCACTL_MODE_MASK)); 1688 1689 if (rc != 0) 1690 goto out; 1691 1692 /* enable diversity */ 1693 rc = atw_rf3000_write(sc, RF3000_DIVCTL, RF3000_DIVCTL_ENABLE); 1694 1695 if (rc != 0) 1696 goto out; 1697 1698 /* sensible setting from a binary-only driver */ 1699 rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1700 __SHIFTIN(0x1d, RF3000_GAINCTL_TXVGC_MASK)); 1701 1702 if (rc != 0) 1703 goto out; 1704 1705 /* magic from a binary-only driver */ 1706 rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, 1707 __SHIFTIN(0x38, RF3000_LOGAINCAL_CAL_MASK)); 1708 1709 if (rc != 0) 1710 goto out; 1711 1712 rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, RF3000_HIGAINCAL_DSSSPAD); 1713 1714 if (rc != 0) 1715 goto out; 1716 1717 /* XXX Reference driver remarks that Abocom sets this to 50. 1718 * Meaning 0x50, I think.... 50 = 0x32, which would set a bit 1719 * in the "reserved" area of register RF3000_OPTIONS1. 1720 */ 1721 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, sc->sc_rf3000_options1); 1722 1723 if (rc != 0) 1724 goto out; 1725 1726 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, sc->sc_rf3000_options2); 1727 1728 if (rc != 0) 1729 goto out; 1730 1731 out: 1732 atw_bbp_io_enable(sc, 0); 1733 return rc; 1734 } 1735 1736 #ifdef ATW_BBPDEBUG 1737 static void 1738 atw_rf3000_print(struct atw_softc *sc) 1739 { 1740 struct ifnet *ifp = &sc->sc_if; 1741 u_int addr, val; 1742 1743 if (atw_debug < 3 || (ifp->if_flags & IFF_DEBUG) == 0) 1744 return; 1745 1746 for (addr = 0x01; addr <= 0x15; addr++) { 1747 printf("%s: bbp[%d] = \n", sc->sc_dev.dv_xname, addr); 1748 if (atw_rf3000_read(sc, addr, &val) != 0) { 1749 printf("<unknown> (quitting print-out)\n"); 1750 break; 1751 } 1752 printf("%08x\n", val); 1753 } 1754 } 1755 #endif /* ATW_BBPDEBUG */ 1756 1757 /* Set the power settings on the BBP for channel `chan'. */ 1758 static int 1759 atw_rf3000_tune(struct atw_softc *sc, u_int chan) 1760 { 1761 int rc = 0; 1762 u_int32_t reg; 1763 u_int16_t txpower, lpf_cutoff, lna_gs_thresh; 1764 1765 txpower = sc->sc_srom[ATW_SR_TXPOWER(chan)]; 1766 lpf_cutoff = sc->sc_srom[ATW_SR_LPF_CUTOFF(chan)]; 1767 lna_gs_thresh = sc->sc_srom[ATW_SR_LNA_GS_THRESH(chan)]; 1768 1769 /* odd channels: LSB, even channels: MSB */ 1770 if (chan % 2 == 1) { 1771 txpower &= 0xFF; 1772 lpf_cutoff &= 0xFF; 1773 lna_gs_thresh &= 0xFF; 1774 } else { 1775 txpower >>= 8; 1776 lpf_cutoff >>= 8; 1777 lna_gs_thresh >>= 8; 1778 } 1779 1780 #ifdef ATW_BBPDEBUG 1781 atw_rf3000_print(sc); 1782 #endif /* ATW_BBPDEBUG */ 1783 1784 DPRINTF(sc, ("%s: chan %d txpower %02x, lpf_cutoff %02x, " 1785 "lna_gs_thresh %02x\n", 1786 sc->sc_dev.dv_xname, chan, txpower, lpf_cutoff, lna_gs_thresh)); 1787 1788 atw_bbp_io_enable(sc, 1); 1789 1790 if ((rc = atw_rf3000_write(sc, RF3000_GAINCTL, 1791 __SHIFTIN(txpower, RF3000_GAINCTL_TXVGC_MASK))) != 0) 1792 goto out; 1793 1794 if ((rc = atw_rf3000_write(sc, RF3000_LOGAINCAL, lpf_cutoff)) != 0) 1795 goto out; 1796 1797 if ((rc = atw_rf3000_write(sc, RF3000_HIGAINCAL, lna_gs_thresh)) != 0) 1798 goto out; 1799 1800 rc = atw_rf3000_write(sc, RF3000_OPTIONS1, 0x0); 1801 1802 if (rc != 0) 1803 goto out; 1804 1805 rc = atw_rf3000_write(sc, RF3000_OPTIONS2, RF3000_OPTIONS2_LNAGS_DELAY); 1806 1807 if (rc != 0) 1808 goto out; 1809 1810 #ifdef ATW_BBPDEBUG 1811 atw_rf3000_print(sc); 1812 #endif /* ATW_BBPDEBUG */ 1813 1814 out: 1815 atw_bbp_io_enable(sc, 0); 1816 1817 /* set beacon, rts, atim transmit power */ 1818 reg = ATW_READ(sc, ATW_PLCPHD); 1819 reg &= ~ATW_PLCPHD_SERVICE_MASK; 1820 reg |= __SHIFTIN(__SHIFTIN(txpower, RF3000_GAINCTL_TXVGC_MASK), 1821 ATW_PLCPHD_SERVICE_MASK); 1822 ATW_WRITE(sc, ATW_PLCPHD, reg); 1823 DELAY(atw_plcphd_delay); 1824 1825 return rc; 1826 } 1827 1828 /* Write a register on the RF3000 baseband processor using the 1829 * registers provided by the ADM8211 for this purpose. 1830 * 1831 * Return 0 on success. 1832 */ 1833 static int 1834 atw_rf3000_write(struct atw_softc *sc, u_int addr, u_int val) 1835 { 1836 u_int32_t reg; 1837 int i; 1838 1839 reg = sc->sc_bbpctl_wr | 1840 __SHIFTIN(val & 0xff, ATW_BBPCTL_DATA_MASK) | 1841 __SHIFTIN(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1842 1843 for (i = 20000 / atw_pseudo_milli; --i >= 0; ) { 1844 ATW_WRITE(sc, ATW_BBPCTL, reg); 1845 DELAY(2 * atw_pseudo_milli); 1846 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_WR) == 0) 1847 break; 1848 } 1849 1850 if (i < 0) { 1851 printf("%s: BBPCTL still busy\n", sc->sc_dev.dv_xname); 1852 return ETIMEDOUT; 1853 } 1854 return 0; 1855 } 1856 1857 /* Read a register on the RF3000 baseband processor using the registers 1858 * the ADM8211 provides for this purpose. 1859 * 1860 * The 7-bit register address is addr. Record the 8-bit data in the register 1861 * in *val. 1862 * 1863 * Return 0 on success. 1864 * 1865 * XXX This does not seem to work. The ADM8211 must require more or 1866 * different magic to read the chip than to write it. Possibly some 1867 * of the magic I have derived from a binary-only driver concerns 1868 * the "chip address" (see the RF3000 manual). 1869 */ 1870 #ifdef ATW_BBPDEBUG 1871 static int 1872 atw_rf3000_read(struct atw_softc *sc, u_int addr, u_int *val) 1873 { 1874 u_int32_t reg; 1875 int i; 1876 1877 for (i = 1000; --i >= 0; ) { 1878 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD|ATW_BBPCTL_WR) == 0) 1879 break; 1880 DELAY(100); 1881 } 1882 1883 if (i < 0) { 1884 printf("%s: start atw_rf3000_read, BBPCTL busy\n", 1885 sc->sc_dev.dv_xname); 1886 return ETIMEDOUT; 1887 } 1888 1889 reg = sc->sc_bbpctl_rd | __SHIFTIN(addr & 0x7f, ATW_BBPCTL_ADDR_MASK); 1890 1891 ATW_WRITE(sc, ATW_BBPCTL, reg); 1892 1893 for (i = 1000; --i >= 0; ) { 1894 DELAY(100); 1895 if (ATW_ISSET(sc, ATW_BBPCTL, ATW_BBPCTL_RD) == 0) 1896 break; 1897 } 1898 1899 ATW_CLR(sc, ATW_BBPCTL, ATW_BBPCTL_RD); 1900 1901 if (i < 0) { 1902 printf("%s: atw_rf3000_read wrote %08x; BBPCTL still busy\n", 1903 sc->sc_dev.dv_xname, reg); 1904 return ETIMEDOUT; 1905 } 1906 if (val != NULL) 1907 *val = __SHIFTOUT(reg, ATW_BBPCTL_DATA_MASK); 1908 return 0; 1909 } 1910 #endif /* ATW_BBPDEBUG */ 1911 1912 /* Write a register on the Si4126 RF/IF synthesizer using the registers 1913 * provided by the ADM8211 for that purpose. 1914 * 1915 * val is 18 bits of data, and val is the 4-bit address of the register. 1916 * 1917 * Return 0 on success. 1918 */ 1919 static void 1920 atw_si4126_write(struct atw_softc *sc, u_int addr, u_int val) 1921 { 1922 uint32_t bits, mask, reg; 1923 const int nbits = 22; 1924 1925 KASSERT((addr & ~__SHIFTOUT_MASK(SI4126_TWI_ADDR_MASK)) == 0); 1926 KASSERT((val & ~__SHIFTOUT_MASK(SI4126_TWI_DATA_MASK)) == 0); 1927 1928 bits = __SHIFTIN(val, SI4126_TWI_DATA_MASK) | 1929 __SHIFTIN(addr, SI4126_TWI_ADDR_MASK); 1930 1931 reg = ATW_SYNRF_SELSYN; 1932 /* reference driver: reset Si4126 serial bus to initial 1933 * conditions? 1934 */ 1935 ATW_WRITE(sc, ATW_SYNRF, reg | ATW_SYNRF_LEIF); 1936 ATW_WRITE(sc, ATW_SYNRF, reg); 1937 1938 for (mask = __BIT(nbits - 1); mask != 0; mask >>= 1) { 1939 if ((bits & mask) != 0) 1940 reg |= ATW_SYNRF_SYNDATA; 1941 else 1942 reg &= ~ATW_SYNRF_SYNDATA; 1943 ATW_WRITE(sc, ATW_SYNRF, reg); 1944 ATW_WRITE(sc, ATW_SYNRF, reg | ATW_SYNRF_SYNCLK); 1945 ATW_WRITE(sc, ATW_SYNRF, reg); 1946 } 1947 ATW_WRITE(sc, ATW_SYNRF, reg | ATW_SYNRF_LEIF); 1948 ATW_WRITE(sc, ATW_SYNRF, 0x0); 1949 } 1950 1951 /* Read 18-bit data from the 4-bit address addr in Si4126 1952 * RF synthesizer and write the data to *val. Return 0 on success. 1953 * 1954 * XXX This does not seem to work. The ADM8211 must require more or 1955 * different magic to read the chip than to write it. 1956 */ 1957 #ifdef ATW_SYNDEBUG 1958 static int 1959 atw_si4126_read(struct atw_softc *sc, u_int addr, u_int *val) 1960 { 1961 u_int32_t reg; 1962 int i; 1963 1964 KASSERT((addr & ~__SHIFTOUT_MASK(SI4126_TWI_ADDR_MASK)) == 0); 1965 1966 for (i = 1000; --i >= 0; ) { 1967 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD|ATW_SYNCTL_WR) == 0) 1968 break; 1969 DELAY(100); 1970 } 1971 1972 if (i < 0) { 1973 printf("%s: start atw_si4126_read, SYNCTL busy\n", 1974 sc->sc_dev.dv_xname); 1975 return ETIMEDOUT; 1976 } 1977 1978 reg = sc->sc_synctl_rd | __SHIFTIN(addr, ATW_SYNCTL_DATA_MASK); 1979 1980 ATW_WRITE(sc, ATW_SYNCTL, reg); 1981 1982 for (i = 1000; --i >= 0; ) { 1983 DELAY(100); 1984 if (ATW_ISSET(sc, ATW_SYNCTL, ATW_SYNCTL_RD) == 0) 1985 break; 1986 } 1987 1988 ATW_CLR(sc, ATW_SYNCTL, ATW_SYNCTL_RD); 1989 1990 if (i < 0) { 1991 printf("%s: atw_si4126_read wrote %#08x, SYNCTL still busy\n", 1992 sc->sc_dev.dv_xname, reg); 1993 return ETIMEDOUT; 1994 } 1995 if (val != NULL) 1996 *val = __SHIFTOUT(ATW_READ(sc, ATW_SYNCTL), 1997 ATW_SYNCTL_DATA_MASK); 1998 return 0; 1999 } 2000 #endif /* ATW_SYNDEBUG */ 2001 2002 /* XXX is the endianness correct? test. */ 2003 #define atw_calchash(addr) \ 2004 (ether_crc32_le((addr), IEEE80211_ADDR_LEN) & __BITS(5, 0)) 2005 2006 /* 2007 * atw_filter_setup: 2008 * 2009 * Set the ADM8211's receive filter. 2010 */ 2011 static void 2012 atw_filter_setup(struct atw_softc *sc) 2013 { 2014 struct ieee80211com *ic = &sc->sc_ic; 2015 struct ethercom *ec = &sc->sc_ec; 2016 struct ifnet *ifp = &sc->sc_if; 2017 int hash; 2018 u_int32_t hashes[2]; 2019 struct ether_multi *enm; 2020 struct ether_multistep step; 2021 2022 /* According to comments in tlp_al981_filter_setup 2023 * (dev/ic/tulip.c) the ADMtek AL981 does not like for its 2024 * multicast filter to be set while it is running. Hopefully 2025 * the ADM8211 is not the same! 2026 */ 2027 if ((ifp->if_flags & IFF_RUNNING) != 0) 2028 atw_idle(sc, ATW_NAR_SR); 2029 2030 sc->sc_opmode &= ~(ATW_NAR_PR|ATW_NAR_MM); 2031 ifp->if_flags &= ~IFF_ALLMULTI; 2032 2033 /* XXX in scan mode, do not filter packets. Maybe this is 2034 * unnecessary. 2035 */ 2036 if (ic->ic_state == IEEE80211_S_SCAN || 2037 (ifp->if_flags & IFF_PROMISC) != 0) { 2038 sc->sc_opmode |= ATW_NAR_PR; 2039 goto allmulti; 2040 } 2041 2042 hashes[0] = hashes[1] = 0x0; 2043 2044 /* 2045 * Program the 64-bit multicast hash filter. 2046 */ 2047 ETHER_FIRST_MULTI(step, ec, enm); 2048 while (enm != NULL) { 2049 if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 2050 ETHER_ADDR_LEN) != 0) 2051 goto allmulti; 2052 2053 hash = atw_calchash(enm->enm_addrlo); 2054 hashes[hash >> 5] |= 1 << (hash & 0x1f); 2055 ETHER_NEXT_MULTI(step, enm); 2056 sc->sc_opmode |= ATW_NAR_MM; 2057 } 2058 ifp->if_flags &= ~IFF_ALLMULTI; 2059 goto setit; 2060 2061 allmulti: 2062 sc->sc_opmode |= ATW_NAR_MM; 2063 ifp->if_flags |= IFF_ALLMULTI; 2064 hashes[0] = hashes[1] = 0xffffffff; 2065 2066 setit: 2067 ATW_WRITE(sc, ATW_MAR0, hashes[0]); 2068 ATW_WRITE(sc, ATW_MAR1, hashes[1]); 2069 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2070 DELAY(atw_nar_delay); 2071 ATW_WRITE(sc, ATW_RDR, 0x1); 2072 2073 DPRINTF(sc, ("%s: ATW_NAR %08x opmode %08x\n", sc->sc_dev.dv_xname, 2074 ATW_READ(sc, ATW_NAR), sc->sc_opmode)); 2075 } 2076 2077 /* Tell the ADM8211 our preferred BSSID. The ADM8211 must match 2078 * a beacon's BSSID and SSID against the preferred BSSID and SSID 2079 * before it will raise ATW_INTR_LINKON. When the ADM8211 receives 2080 * no beacon with the preferred BSSID and SSID in the number of 2081 * beacon intervals given in ATW_BPLI, then it raises ATW_INTR_LINKOFF. 2082 */ 2083 static void 2084 atw_write_bssid(struct atw_softc *sc) 2085 { 2086 struct ieee80211com *ic = &sc->sc_ic; 2087 u_int8_t *bssid; 2088 2089 bssid = ic->ic_bss->ni_bssid; 2090 2091 ATW_WRITE(sc, ATW_BSSID0, 2092 __SHIFTIN(bssid[0], ATW_BSSID0_BSSIDB0_MASK) | 2093 __SHIFTIN(bssid[1], ATW_BSSID0_BSSIDB1_MASK) | 2094 __SHIFTIN(bssid[2], ATW_BSSID0_BSSIDB2_MASK) | 2095 __SHIFTIN(bssid[3], ATW_BSSID0_BSSIDB3_MASK)); 2096 2097 ATW_WRITE(sc, ATW_ABDA1, 2098 (ATW_READ(sc, ATW_ABDA1) & 2099 ~(ATW_ABDA1_BSSIDB4_MASK|ATW_ABDA1_BSSIDB5_MASK)) | 2100 __SHIFTIN(bssid[4], ATW_ABDA1_BSSIDB4_MASK) | 2101 __SHIFTIN(bssid[5], ATW_ABDA1_BSSIDB5_MASK)); 2102 2103 DPRINTF(sc, ("%s: BSSID %s -> ", sc->sc_dev.dv_xname, 2104 ether_sprintf(sc->sc_bssid))); 2105 DPRINTF(sc, ("%s\n", ether_sprintf(bssid))); 2106 2107 memcpy(sc->sc_bssid, bssid, sizeof(sc->sc_bssid)); 2108 } 2109 2110 /* Write buflen bytes from buf to SRAM starting at the SRAM's ofs'th 2111 * 16-bit word. 2112 */ 2113 static void 2114 atw_write_sram(struct atw_softc *sc, u_int ofs, u_int8_t *buf, u_int buflen) 2115 { 2116 u_int i; 2117 u_int8_t *ptr; 2118 2119 memcpy(&sc->sc_sram[ofs], buf, buflen); 2120 2121 KASSERT(ofs % 2 == 0 && buflen % 2 == 0); 2122 2123 KASSERT(buflen + ofs <= sc->sc_sramlen); 2124 2125 ptr = &sc->sc_sram[ofs]; 2126 2127 for (i = 0; i < buflen; i += 2) { 2128 ATW_WRITE(sc, ATW_WEPCTL, ATW_WEPCTL_WR | 2129 __SHIFTIN((ofs + i) / 2, ATW_WEPCTL_TBLADD_MASK)); 2130 DELAY(atw_writewep_delay); 2131 2132 ATW_WRITE(sc, ATW_WESK, 2133 __SHIFTIN((ptr[i + 1] << 8) | ptr[i], ATW_WESK_DATA_MASK)); 2134 DELAY(atw_writewep_delay); 2135 } 2136 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); /* restore WEP condition */ 2137 2138 if (sc->sc_if.if_flags & IFF_DEBUG) { 2139 int n_octets = 0; 2140 printf("%s: wrote %d bytes at 0x%x wepctl 0x%08x\n", 2141 sc->sc_dev.dv_xname, buflen, ofs, sc->sc_wepctl); 2142 for (i = 0; i < buflen; i++) { 2143 printf(" %02x", ptr[i]); 2144 if (++n_octets % 24 == 0) 2145 printf("\n"); 2146 } 2147 if (n_octets % 24 != 0) 2148 printf("\n"); 2149 } 2150 } 2151 2152 static int 2153 atw_key_delete(struct ieee80211com *ic, const struct ieee80211_key *k) 2154 { 2155 struct atw_softc *sc = ic->ic_ifp->if_softc; 2156 u_int keyix = k->wk_keyix; 2157 2158 DPRINTF(sc, ("%s: delete key %u\n", __func__, keyix)); 2159 2160 if (keyix >= IEEE80211_WEP_NKID) 2161 return 0; 2162 if (k->wk_keylen != 0) 2163 sc->sc_flags &= ~ATWF_WEP_SRAM_VALID; 2164 2165 return 1; 2166 } 2167 2168 static int 2169 atw_key_set(struct ieee80211com *ic, const struct ieee80211_key *k, 2170 const u_int8_t mac[IEEE80211_ADDR_LEN]) 2171 { 2172 struct atw_softc *sc = ic->ic_ifp->if_softc; 2173 2174 DPRINTF(sc, ("%s: set key %u\n", __func__, k->wk_keyix)); 2175 2176 if (k->wk_keyix >= IEEE80211_WEP_NKID) 2177 return 0; 2178 2179 sc->sc_flags &= ~ATWF_WEP_SRAM_VALID; 2180 2181 return 1; 2182 } 2183 2184 static void 2185 atw_key_update_begin(struct ieee80211com *ic) 2186 { 2187 #ifdef ATW_DEBUG 2188 struct ifnet *ifp = ic->ic_ifp; 2189 struct atw_softc *sc = ifp->if_softc; 2190 #endif 2191 2192 DPRINTF(sc, ("%s:\n", __func__)); 2193 } 2194 2195 static void 2196 atw_key_update_end(struct ieee80211com *ic) 2197 { 2198 struct ifnet *ifp = ic->ic_ifp; 2199 struct atw_softc *sc = ifp->if_softc; 2200 2201 DPRINTF(sc, ("%s:\n", __func__)); 2202 2203 if ((sc->sc_flags & ATWF_WEP_SRAM_VALID) != 0) 2204 return; 2205 if (ATW_IS_ENABLED(sc) == 0) 2206 return; 2207 atw_idle(sc, ATW_NAR_SR | ATW_NAR_ST); 2208 atw_write_wep(sc); 2209 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2210 DELAY(atw_nar_delay); 2211 ATW_WRITE(sc, ATW_RDR, 0x1); 2212 } 2213 2214 /* Write WEP keys from the ieee80211com to the ADM8211's SRAM. */ 2215 static void 2216 atw_write_wep(struct atw_softc *sc) 2217 { 2218 #if 0 2219 struct ieee80211com *ic = &sc->sc_ic; 2220 u_int32_t reg; 2221 int i; 2222 #endif 2223 /* SRAM shared-key record format: key0 flags key1 ... key12 */ 2224 u_int8_t buf[IEEE80211_WEP_NKID] 2225 [1 /* key[0] */ + 1 /* flags */ + 12 /* key[1 .. 12] */]; 2226 2227 sc->sc_wepctl = 0; 2228 ATW_WRITE(sc, ATW_WEPCTL, sc->sc_wepctl); 2229 2230 memset(&buf[0][0], 0, sizeof(buf)); 2231 2232 #if 0 2233 for (i = 0; i < IEEE80211_WEP_NKID; i++) { 2234 if (ic->ic_nw_keys[i].wk_keylen > 5) { 2235 buf[i][1] = ATW_WEP_ENABLED | ATW_WEP_104BIT; 2236 } else if (ic->ic_nw_keys[i].wk_keylen != 0) { 2237 buf[i][1] = ATW_WEP_ENABLED; 2238 } else { 2239 buf[i][1] = 0; 2240 continue; 2241 } 2242 buf[i][0] = ic->ic_nw_keys[i].wk_key[0]; 2243 memcpy(&buf[i][2], &ic->ic_nw_keys[i].wk_key[1], 2244 ic->ic_nw_keys[i].wk_keylen - 1); 2245 } 2246 2247 reg = ATW_READ(sc, ATW_MACTEST); 2248 reg |= ATW_MACTEST_MMI_USETXCLK | ATW_MACTEST_FORCE_KEYID; 2249 reg &= ~ATW_MACTEST_KEYID_MASK; 2250 reg |= __SHIFTIN(ic->ic_def_txkey, ATW_MACTEST_KEYID_MASK); 2251 ATW_WRITE(sc, ATW_MACTEST, reg); 2252 2253 if ((ic->ic_flags & IEEE80211_F_PRIVACY) != 0) 2254 sc->sc_wepctl |= ATW_WEPCTL_WEPENABLE; 2255 2256 switch (sc->sc_rev) { 2257 case ATW_REVISION_AB: 2258 case ATW_REVISION_AF: 2259 /* Bypass WEP on Rx. */ 2260 sc->sc_wepctl |= ATW_WEPCTL_WEPRXBYP; 2261 break; 2262 default: 2263 break; 2264 } 2265 #endif 2266 2267 atw_write_sram(sc, ATW_SRAM_ADDR_SHARED_KEY, (u_int8_t*)&buf[0][0], 2268 sizeof(buf)); 2269 2270 sc->sc_flags |= ATWF_WEP_SRAM_VALID; 2271 } 2272 2273 static void 2274 atw_recv_mgmt(struct ieee80211com *ic, struct mbuf *m, 2275 struct ieee80211_node *ni, int subtype, int rssi, u_int32_t rstamp) 2276 { 2277 struct atw_softc *sc = (struct atw_softc *)ic->ic_ifp->if_softc; 2278 2279 /* The ADM8211A answers probe requests. TBD ADM8211B/C. */ 2280 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_REQ) 2281 return; 2282 2283 (*sc->sc_recv_mgmt)(ic, m, ni, subtype, rssi, rstamp); 2284 2285 switch (subtype) { 2286 case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 2287 case IEEE80211_FC0_SUBTYPE_BEACON: 2288 if (ic->ic_opmode == IEEE80211_M_IBSS && 2289 ic->ic_state == IEEE80211_S_RUN) { 2290 if (le64toh(ni->ni_tstamp.tsf) >= atw_get_tsft(sc)) 2291 (void)ieee80211_ibss_merge(ni); 2292 } 2293 break; 2294 default: 2295 break; 2296 } 2297 return; 2298 } 2299 2300 /* Write the SSID in the ieee80211com to the SRAM on the ADM8211. 2301 * In ad hoc mode, the SSID is written to the beacons sent by the 2302 * ADM8211. In both ad hoc and infrastructure mode, beacons received 2303 * with matching SSID affect ATW_INTR_LINKON/ATW_INTR_LINKOFF 2304 * indications. 2305 */ 2306 static void 2307 atw_write_ssid(struct atw_softc *sc) 2308 { 2309 struct ieee80211com *ic = &sc->sc_ic; 2310 /* 34 bytes are reserved in ADM8211 SRAM for the SSID, but 2311 * it only expects the element length, not its ID. 2312 */ 2313 u_int8_t buf[roundup(1 /* length */ + IEEE80211_NWID_LEN, 2)]; 2314 2315 memset(buf, 0, sizeof(buf)); 2316 buf[0] = ic->ic_bss->ni_esslen; 2317 memcpy(&buf[1], ic->ic_bss->ni_essid, ic->ic_bss->ni_esslen); 2318 2319 atw_write_sram(sc, ATW_SRAM_ADDR_SSID, buf, 2320 roundup(1 + ic->ic_bss->ni_esslen, 2)); 2321 } 2322 2323 /* Write the supported rates in the ieee80211com to the SRAM of the ADM8211. 2324 * In ad hoc mode, the supported rates are written to beacons sent by the 2325 * ADM8211. 2326 */ 2327 static void 2328 atw_write_sup_rates(struct atw_softc *sc) 2329 { 2330 struct ieee80211com *ic = &sc->sc_ic; 2331 /* 14 bytes are probably (XXX) reserved in the ADM8211 SRAM for 2332 * supported rates 2333 */ 2334 u_int8_t buf[roundup(1 /* length */ + IEEE80211_RATE_SIZE, 2)]; 2335 2336 memset(buf, 0, sizeof(buf)); 2337 2338 buf[0] = ic->ic_bss->ni_rates.rs_nrates; 2339 2340 memcpy(&buf[1], ic->ic_bss->ni_rates.rs_rates, 2341 ic->ic_bss->ni_rates.rs_nrates); 2342 2343 atw_write_sram(sc, ATW_SRAM_ADDR_SUPRATES, buf, sizeof(buf)); 2344 } 2345 2346 /* Start/stop sending beacons. */ 2347 void 2348 atw_start_beacon(struct atw_softc *sc, int start) 2349 { 2350 struct ieee80211com *ic = &sc->sc_ic; 2351 uint16_t chan; 2352 uint32_t bcnt, bpli, cap0, cap1, capinfo; 2353 size_t len; 2354 2355 if (ATW_IS_ENABLED(sc) == 0) 2356 return; 2357 2358 /* start beacons */ 2359 len = sizeof(struct ieee80211_frame) + 2360 8 /* timestamp */ + 2 /* beacon interval */ + 2361 2 /* capability info */ + 2362 2 + ic->ic_bss->ni_esslen /* SSID element */ + 2363 2 + ic->ic_bss->ni_rates.rs_nrates /* rates element */ + 2364 3 /* DS parameters */ + 2365 IEEE80211_CRC_LEN; 2366 2367 bcnt = ATW_READ(sc, ATW_BCNT) & ~ATW_BCNT_BCNT_MASK; 2368 cap0 = ATW_READ(sc, ATW_CAP0) & ~ATW_CAP0_CHN_MASK; 2369 cap1 = ATW_READ(sc, ATW_CAP1) & ~ATW_CAP1_CAPI_MASK; 2370 2371 ATW_WRITE(sc, ATW_BCNT, bcnt); 2372 ATW_WRITE(sc, ATW_CAP1, cap1); 2373 2374 if (!start) 2375 return; 2376 2377 /* TBD use ni_capinfo */ 2378 2379 capinfo = 0; 2380 if (sc->sc_flags & ATWF_SHORT_PREAMBLE) 2381 capinfo |= IEEE80211_CAPINFO_SHORT_PREAMBLE; 2382 if (ic->ic_flags & IEEE80211_F_PRIVACY) 2383 capinfo |= IEEE80211_CAPINFO_PRIVACY; 2384 2385 switch (ic->ic_opmode) { 2386 case IEEE80211_M_IBSS: 2387 len += 4; /* IBSS parameters */ 2388 capinfo |= IEEE80211_CAPINFO_IBSS; 2389 break; 2390 case IEEE80211_M_HOSTAP: 2391 /* XXX 6-byte minimum TIM */ 2392 len += atw_beacon_len_adjust; 2393 capinfo |= IEEE80211_CAPINFO_ESS; 2394 break; 2395 default: 2396 return; 2397 } 2398 2399 /* set listen interval 2400 * XXX do software units agree w/ hardware? 2401 */ 2402 bpli = __SHIFTIN(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2403 __SHIFTIN(ic->ic_lintval / ic->ic_bss->ni_intval, ATW_BPLI_LI_MASK); 2404 2405 chan = ieee80211_chan2ieee(ic, ic->ic_curchan); 2406 2407 bcnt |= __SHIFTIN(len, ATW_BCNT_BCNT_MASK); 2408 cap0 |= __SHIFTIN(chan, ATW_CAP0_CHN_MASK); 2409 cap1 |= __SHIFTIN(capinfo, ATW_CAP1_CAPI_MASK); 2410 2411 ATW_WRITE(sc, ATW_BCNT, bcnt); 2412 ATW_WRITE(sc, ATW_BPLI, bpli); 2413 ATW_WRITE(sc, ATW_CAP0, cap0); 2414 ATW_WRITE(sc, ATW_CAP1, cap1); 2415 2416 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_BCNT] = %08x\n", 2417 sc->sc_dev.dv_xname, bcnt)); 2418 2419 DPRINTF(sc, ("%s: atw_start_beacon reg[ATW_CAP1] = %08x\n", 2420 sc->sc_dev.dv_xname, cap1)); 2421 } 2422 2423 /* Return the 32 lsb of the last TSFT divisible by ival. */ 2424 static inline uint32_t 2425 atw_last_even_tsft(uint32_t tsfth, uint32_t tsftl, uint32_t ival) 2426 { 2427 /* Following the reference driver's lead, I compute 2428 * 2429 * (uint32_t)((((uint64_t)tsfth << 32) | tsftl) % ival) 2430 * 2431 * without using 64-bit arithmetic, using the following 2432 * relationship: 2433 * 2434 * (0x100000000 * H + L) % m 2435 * = ((0x100000000 % m) * H + L) % m 2436 * = (((0xffffffff + 1) % m) * H + L) % m 2437 * = ((0xffffffff % m + 1 % m) * H + L) % m 2438 * = ((0xffffffff % m + 1) * H + L) % m 2439 */ 2440 return ((0xFFFFFFFF % ival + 1) * tsfth + tsftl) % ival; 2441 } 2442 2443 static uint64_t 2444 atw_get_tsft(struct atw_softc *sc) 2445 { 2446 int i; 2447 uint32_t tsfth, tsftl; 2448 for (i = 0; i < 2; i++) { 2449 tsfth = ATW_READ(sc, ATW_TSFTH); 2450 tsftl = ATW_READ(sc, ATW_TSFTL); 2451 if (ATW_READ(sc, ATW_TSFTH) == tsfth) 2452 break; 2453 } 2454 return ((uint64_t)tsfth << 32) | tsftl; 2455 } 2456 2457 /* If we've created an IBSS, write the TSF time in the ADM8211 to 2458 * the ieee80211com. 2459 * 2460 * Predict the next target beacon transmission time (TBTT) and 2461 * write it to the ADM8211. 2462 */ 2463 static void 2464 atw_predict_beacon(struct atw_softc *sc) 2465 { 2466 #define TBTTOFS 20 /* TU */ 2467 2468 struct ieee80211com *ic = &sc->sc_ic; 2469 uint64_t tsft; 2470 uint32_t ival, past_even, tbtt, tsfth, tsftl; 2471 union { 2472 uint64_t word; 2473 uint8_t tstamp[8]; 2474 } u; 2475 2476 if ((ic->ic_opmode == IEEE80211_M_HOSTAP) || 2477 ((ic->ic_opmode == IEEE80211_M_IBSS) && 2478 (ic->ic_flags & IEEE80211_F_SIBSS))) { 2479 tsft = atw_get_tsft(sc); 2480 u.word = htole64(tsft); 2481 (void)memcpy(&ic->ic_bss->ni_tstamp, &u.tstamp[0], 2482 sizeof(ic->ic_bss->ni_tstamp)); 2483 } else 2484 tsft = le64toh(ic->ic_bss->ni_tstamp.tsf); 2485 2486 ival = ic->ic_bss->ni_intval * IEEE80211_DUR_TU; 2487 2488 tsftl = tsft & 0xFFFFFFFF; 2489 tsfth = tsft >> 32; 2490 2491 /* We sent/received the last beacon `past' microseconds 2492 * after the interval divided the TSF timer. 2493 */ 2494 past_even = tsftl - atw_last_even_tsft(tsfth, tsftl, ival); 2495 2496 /* Skip ten beacons so that the TBTT cannot pass before 2497 * we've programmed it. Ten is an arbitrary number. 2498 */ 2499 tbtt = past_even + ival * 10; 2500 2501 ATW_WRITE(sc, ATW_TOFS1, 2502 __SHIFTIN(1, ATW_TOFS1_TSFTOFSR_MASK) | 2503 __SHIFTIN(TBTTOFS, ATW_TOFS1_TBTTOFS_MASK) | 2504 __SHIFTIN(__SHIFTOUT(tbtt - TBTTOFS * IEEE80211_DUR_TU, 2505 ATW_TBTTPRE_MASK), ATW_TOFS1_TBTTPRE_MASK)); 2506 #undef TBTTOFS 2507 } 2508 2509 static void 2510 atw_next_scan(void *arg) 2511 { 2512 struct atw_softc *sc = arg; 2513 struct ieee80211com *ic = &sc->sc_ic; 2514 int s; 2515 2516 /* don't call atw_start w/o network interrupts blocked */ 2517 s = splnet(); 2518 if (ic->ic_state == IEEE80211_S_SCAN) 2519 ieee80211_next_scan(ic); 2520 splx(s); 2521 } 2522 2523 /* Synchronize the hardware state with the software state. */ 2524 static int 2525 atw_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 2526 { 2527 struct ifnet *ifp = ic->ic_ifp; 2528 struct atw_softc *sc = ifp->if_softc; 2529 enum ieee80211_state ostate; 2530 int error = 0; 2531 2532 ostate = ic->ic_state; 2533 callout_stop(&sc->sc_scan_ch); 2534 2535 switch (nstate) { 2536 case IEEE80211_S_AUTH: 2537 case IEEE80211_S_ASSOC: 2538 atw_write_bssid(sc); 2539 error = atw_tune(sc); 2540 break; 2541 case IEEE80211_S_INIT: 2542 callout_stop(&sc->sc_scan_ch); 2543 sc->sc_cur_chan = IEEE80211_CHAN_ANY; 2544 atw_start_beacon(sc, 0); 2545 break; 2546 case IEEE80211_S_SCAN: 2547 error = atw_tune(sc); 2548 callout_reset(&sc->sc_scan_ch, atw_dwelltime * hz / 1000, 2549 atw_next_scan, sc); 2550 break; 2551 case IEEE80211_S_RUN: 2552 error = atw_tune(sc); 2553 atw_write_bssid(sc); 2554 atw_write_ssid(sc); 2555 atw_write_sup_rates(sc); 2556 2557 if (ic->ic_opmode == IEEE80211_M_AHDEMO || 2558 ic->ic_opmode == IEEE80211_M_MONITOR) 2559 break; 2560 2561 /* set listen interval 2562 * XXX do software units agree w/ hardware? 2563 */ 2564 ATW_WRITE(sc, ATW_BPLI, 2565 __SHIFTIN(ic->ic_bss->ni_intval, ATW_BPLI_BP_MASK) | 2566 __SHIFTIN(ic->ic_lintval / ic->ic_bss->ni_intval, 2567 ATW_BPLI_LI_MASK)); 2568 2569 DPRINTF(sc, ("%s: reg[ATW_BPLI] = %08x\n", sc->sc_dev.dv_xname, 2570 ATW_READ(sc, ATW_BPLI))); 2571 2572 atw_predict_beacon(sc); 2573 2574 switch (ic->ic_opmode) { 2575 case IEEE80211_M_AHDEMO: 2576 case IEEE80211_M_HOSTAP: 2577 case IEEE80211_M_IBSS: 2578 atw_start_beacon(sc, 1); 2579 break; 2580 case IEEE80211_M_MONITOR: 2581 case IEEE80211_M_STA: 2582 break; 2583 } 2584 2585 break; 2586 } 2587 return (error != 0) ? error : (*sc->sc_newstate)(ic, nstate, arg); 2588 } 2589 2590 /* 2591 * atw_add_rxbuf: 2592 * 2593 * Add a receive buffer to the indicated descriptor. 2594 */ 2595 int 2596 atw_add_rxbuf(struct atw_softc *sc, int idx) 2597 { 2598 struct atw_rxsoft *rxs = &sc->sc_rxsoft[idx]; 2599 struct mbuf *m; 2600 int error; 2601 2602 MGETHDR(m, M_DONTWAIT, MT_DATA); 2603 if (m == NULL) 2604 return (ENOBUFS); 2605 2606 MCLGET(m, M_DONTWAIT); 2607 if ((m->m_flags & M_EXT) == 0) { 2608 m_freem(m); 2609 return (ENOBUFS); 2610 } 2611 2612 if (rxs->rxs_mbuf != NULL) 2613 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2614 2615 rxs->rxs_mbuf = m; 2616 2617 error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap, 2618 m->m_ext.ext_buf, m->m_ext.ext_size, NULL, 2619 BUS_DMA_READ|BUS_DMA_NOWAIT); 2620 if (error) { 2621 printf("%s: can't load rx DMA map %d, error = %d\n", 2622 sc->sc_dev.dv_xname, idx, error); 2623 panic("atw_add_rxbuf"); /* XXX */ 2624 } 2625 2626 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 2627 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 2628 2629 ATW_INIT_RXDESC(sc, idx); 2630 2631 return (0); 2632 } 2633 2634 /* 2635 * Release any queued transmit buffers. 2636 */ 2637 void 2638 atw_txdrain(struct atw_softc *sc) 2639 { 2640 struct atw_txsoft *txs; 2641 2642 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 2643 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 2644 if (txs->txs_mbuf != NULL) { 2645 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2646 m_freem(txs->txs_mbuf); 2647 txs->txs_mbuf = NULL; 2648 } 2649 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 2650 sc->sc_txfree += txs->txs_ndescs; 2651 } 2652 2653 KASSERT((sc->sc_if.if_flags & IFF_RUNNING) == 0 || 2654 !(SIMPLEQ_EMPTY(&sc->sc_txfreeq) || 2655 sc->sc_txfree != ATW_NTXDESC)); 2656 sc->sc_if.if_flags &= ~IFF_OACTIVE; 2657 sc->sc_tx_timer = 0; 2658 } 2659 2660 /* 2661 * atw_stop: [ ifnet interface function ] 2662 * 2663 * Stop transmission on the interface. 2664 */ 2665 void 2666 atw_stop(struct ifnet *ifp, int disable) 2667 { 2668 struct atw_softc *sc = ifp->if_softc; 2669 struct ieee80211com *ic = &sc->sc_ic; 2670 2671 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2672 2673 /* Disable interrupts. */ 2674 ATW_WRITE(sc, ATW_IER, 0); 2675 2676 /* Stop the transmit and receive processes. */ 2677 sc->sc_opmode = 0; 2678 ATW_WRITE(sc, ATW_NAR, 0); 2679 DELAY(atw_nar_delay); 2680 ATW_WRITE(sc, ATW_TDBD, 0); 2681 ATW_WRITE(sc, ATW_TDBP, 0); 2682 ATW_WRITE(sc, ATW_RDB, 0); 2683 2684 atw_txdrain(sc); 2685 2686 if (disable) { 2687 atw_rxdrain(sc); 2688 atw_disable(sc); 2689 } 2690 2691 /* 2692 * Mark the interface down and cancel the watchdog timer. 2693 */ 2694 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2695 sc->sc_tx_timer = 0; 2696 ifp->if_timer = 0; 2697 2698 if (!disable) 2699 atw_reset(sc); 2700 } 2701 2702 /* 2703 * atw_rxdrain: 2704 * 2705 * Drain the receive queue. 2706 */ 2707 void 2708 atw_rxdrain(struct atw_softc *sc) 2709 { 2710 struct atw_rxsoft *rxs; 2711 int i; 2712 2713 for (i = 0; i < ATW_NRXDESC; i++) { 2714 rxs = &sc->sc_rxsoft[i]; 2715 if (rxs->rxs_mbuf == NULL) 2716 continue; 2717 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2718 m_freem(rxs->rxs_mbuf); 2719 rxs->rxs_mbuf = NULL; 2720 } 2721 } 2722 2723 /* 2724 * atw_detach: 2725 * 2726 * Detach an ADM8211 interface. 2727 */ 2728 int 2729 atw_detach(struct atw_softc *sc) 2730 { 2731 struct ifnet *ifp = &sc->sc_if; 2732 struct atw_rxsoft *rxs; 2733 struct atw_txsoft *txs; 2734 int i; 2735 2736 /* 2737 * Succeed now if there isn't any work to do. 2738 */ 2739 if ((sc->sc_flags & ATWF_ATTACHED) == 0) 2740 return (0); 2741 2742 callout_stop(&sc->sc_scan_ch); 2743 2744 ieee80211_ifdetach(&sc->sc_ic); 2745 if_detach(ifp); 2746 2747 for (i = 0; i < ATW_NRXDESC; i++) { 2748 rxs = &sc->sc_rxsoft[i]; 2749 if (rxs->rxs_mbuf != NULL) { 2750 bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap); 2751 m_freem(rxs->rxs_mbuf); 2752 rxs->rxs_mbuf = NULL; 2753 } 2754 bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap); 2755 } 2756 for (i = 0; i < ATW_TXQUEUELEN; i++) { 2757 txs = &sc->sc_txsoft[i]; 2758 if (txs->txs_mbuf != NULL) { 2759 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 2760 m_freem(txs->txs_mbuf); 2761 txs->txs_mbuf = NULL; 2762 } 2763 bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap); 2764 } 2765 bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap); 2766 bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap); 2767 bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data, 2768 sizeof(struct atw_control_data)); 2769 bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg); 2770 2771 shutdownhook_disestablish(sc->sc_sdhook); 2772 powerhook_disestablish(sc->sc_powerhook); 2773 2774 if (sc->sc_srom) 2775 free(sc->sc_srom, M_DEVBUF); 2776 2777 return (0); 2778 } 2779 2780 /* atw_shutdown: make sure the interface is stopped at reboot time. */ 2781 void 2782 atw_shutdown(void *arg) 2783 { 2784 struct atw_softc *sc = arg; 2785 2786 atw_stop(&sc->sc_if, 1); 2787 } 2788 2789 int 2790 atw_intr(void *arg) 2791 { 2792 struct atw_softc *sc = arg; 2793 struct ifnet *ifp = &sc->sc_if; 2794 u_int32_t status, rxstatus, txstatus, linkstatus; 2795 int handled = 0, txthresh; 2796 2797 #ifdef DEBUG 2798 if (ATW_IS_ENABLED(sc) == 0) 2799 panic("%s: atw_intr: not enabled", sc->sc_dev.dv_xname); 2800 #endif 2801 2802 /* 2803 * If the interface isn't running, the interrupt couldn't 2804 * possibly have come from us. 2805 */ 2806 if ((ifp->if_flags & IFF_RUNNING) == 0 || 2807 !device_is_active(&sc->sc_dev)) 2808 return (0); 2809 2810 for (;;) { 2811 status = ATW_READ(sc, ATW_STSR); 2812 2813 if (status) 2814 ATW_WRITE(sc, ATW_STSR, status); 2815 2816 #ifdef ATW_DEBUG 2817 #define PRINTINTR(flag) do { \ 2818 if ((status & flag) != 0) { \ 2819 printf("%s" #flag, delim); \ 2820 delim = ","; \ 2821 } \ 2822 } while (0) 2823 2824 if (atw_debug > 1 && status) { 2825 const char *delim = "<"; 2826 2827 printf("%s: reg[STSR] = %x", 2828 sc->sc_dev.dv_xname, status); 2829 2830 PRINTINTR(ATW_INTR_FBE); 2831 PRINTINTR(ATW_INTR_LINKOFF); 2832 PRINTINTR(ATW_INTR_LINKON); 2833 PRINTINTR(ATW_INTR_RCI); 2834 PRINTINTR(ATW_INTR_RDU); 2835 PRINTINTR(ATW_INTR_REIS); 2836 PRINTINTR(ATW_INTR_RPS); 2837 PRINTINTR(ATW_INTR_TCI); 2838 PRINTINTR(ATW_INTR_TDU); 2839 PRINTINTR(ATW_INTR_TLT); 2840 PRINTINTR(ATW_INTR_TPS); 2841 PRINTINTR(ATW_INTR_TRT); 2842 PRINTINTR(ATW_INTR_TUF); 2843 PRINTINTR(ATW_INTR_BCNTC); 2844 PRINTINTR(ATW_INTR_ATIME); 2845 PRINTINTR(ATW_INTR_TBTT); 2846 PRINTINTR(ATW_INTR_TSCZ); 2847 PRINTINTR(ATW_INTR_TSFTF); 2848 printf(">\n"); 2849 } 2850 #undef PRINTINTR 2851 #endif /* ATW_DEBUG */ 2852 2853 if ((status & sc->sc_inten) == 0) 2854 break; 2855 2856 handled = 1; 2857 2858 rxstatus = status & sc->sc_rxint_mask; 2859 txstatus = status & sc->sc_txint_mask; 2860 linkstatus = status & sc->sc_linkint_mask; 2861 2862 if (linkstatus) { 2863 atw_linkintr(sc, linkstatus); 2864 } 2865 2866 if (rxstatus) { 2867 /* Grab any new packets. */ 2868 atw_rxintr(sc); 2869 2870 if (rxstatus & ATW_INTR_RDU) { 2871 printf("%s: receive ring overrun\n", 2872 sc->sc_dev.dv_xname); 2873 /* Get the receive process going again. */ 2874 ATW_WRITE(sc, ATW_RDR, 0x1); 2875 break; 2876 } 2877 } 2878 2879 if (txstatus) { 2880 /* Sweep up transmit descriptors. */ 2881 atw_txintr(sc); 2882 2883 if (txstatus & ATW_INTR_TLT) { 2884 DPRINTF(sc, ("%s: tx lifetime exceeded\n", 2885 sc->sc_dev.dv_xname)); 2886 } 2887 2888 if (txstatus & ATW_INTR_TRT) { 2889 DPRINTF(sc, ("%s: tx retry limit exceeded\n", 2890 sc->sc_dev.dv_xname)); 2891 } 2892 2893 /* If Tx under-run, increase our transmit threshold 2894 * if another is available. 2895 */ 2896 txthresh = sc->sc_txthresh + 1; 2897 if ((txstatus & ATW_INTR_TUF) && 2898 sc->sc_txth[txthresh].txth_name != NULL) { 2899 /* Idle the transmit process. */ 2900 atw_idle(sc, ATW_NAR_ST); 2901 2902 sc->sc_txthresh = txthresh; 2903 sc->sc_opmode &= ~(ATW_NAR_TR_MASK|ATW_NAR_SF); 2904 sc->sc_opmode |= 2905 sc->sc_txth[txthresh].txth_opmode; 2906 printf("%s: transmit underrun; new " 2907 "threshold: %s\n", sc->sc_dev.dv_xname, 2908 sc->sc_txth[txthresh].txth_name); 2909 2910 /* Set the new threshold and restart 2911 * the transmit process. 2912 */ 2913 ATW_WRITE(sc, ATW_NAR, sc->sc_opmode); 2914 DELAY(atw_nar_delay); 2915 ATW_WRITE(sc, ATW_RDR, 0x1); 2916 /* XXX Log every Nth underrun from 2917 * XXX now on? 2918 */ 2919 } 2920 } 2921 2922 if (status & (ATW_INTR_TPS|ATW_INTR_RPS)) { 2923 if (status & ATW_INTR_TPS) 2924 printf("%s: transmit process stopped\n", 2925 sc->sc_dev.dv_xname); 2926 if (status & ATW_INTR_RPS) 2927 printf("%s: receive process stopped\n", 2928 sc->sc_dev.dv_xname); 2929 (void)atw_init(ifp); 2930 break; 2931 } 2932 2933 if (status & ATW_INTR_FBE) { 2934 printf("%s: fatal bus error\n", sc->sc_dev.dv_xname); 2935 (void)atw_init(ifp); 2936 break; 2937 } 2938 2939 /* 2940 * Not handled: 2941 * 2942 * Transmit buffer unavailable -- normal 2943 * condition, nothing to do, really. 2944 * 2945 * Early receive interrupt -- not available on 2946 * all chips, we just use RI. We also only 2947 * use single-segment receive DMA, so this 2948 * is mostly useless. 2949 * 2950 * TBD others 2951 */ 2952 } 2953 2954 /* Try to get more packets going. */ 2955 atw_start(ifp); 2956 2957 return (handled); 2958 } 2959 2960 /* 2961 * atw_idle: 2962 * 2963 * Cause the transmit and/or receive processes to go idle. 2964 * 2965 * XXX It seems that the ADM8211 will not signal the end of the Rx/Tx 2966 * process in STSR if I clear SR or ST after the process has already 2967 * ceased. Fair enough. But the Rx process status bits in ATW_TEST0 2968 * do not seem to be too reliable. Perhaps I have the sense of the 2969 * Rx bits switched with the Tx bits? 2970 */ 2971 void 2972 atw_idle(struct atw_softc *sc, u_int32_t bits) 2973 { 2974 u_int32_t ackmask = 0, opmode, stsr, test0; 2975 int i, s; 2976 2977 s = splnet(); 2978 2979 opmode = sc->sc_opmode & ~bits; 2980 2981 if (bits & ATW_NAR_SR) 2982 ackmask |= ATW_INTR_RPS; 2983 2984 if (bits & ATW_NAR_ST) { 2985 ackmask |= ATW_INTR_TPS; 2986 /* set ATW_NAR_HF to flush TX FIFO. */ 2987 opmode |= ATW_NAR_HF; 2988 } 2989 2990 ATW_WRITE(sc, ATW_NAR, opmode); 2991 DELAY(atw_nar_delay); 2992 2993 for (i = 0; i < 1000; i++) { 2994 stsr = ATW_READ(sc, ATW_STSR); 2995 if ((stsr & ackmask) == ackmask) 2996 break; 2997 DELAY(10); 2998 } 2999 3000 ATW_WRITE(sc, ATW_STSR, stsr & ackmask); 3001 3002 if ((stsr & ackmask) == ackmask) 3003 goto out; 3004 3005 test0 = ATW_READ(sc, ATW_TEST0); 3006 3007 if ((bits & ATW_NAR_ST) != 0 && (stsr & ATW_INTR_TPS) == 0 && 3008 (test0 & ATW_TEST0_TS_MASK) != ATW_TEST0_TS_STOPPED) { 3009 printf("%s: transmit process not idle [%s]\n", 3010 sc->sc_dev.dv_xname, 3011 atw_tx_state[__SHIFTOUT(test0, ATW_TEST0_TS_MASK)]); 3012 printf("%s: bits %08x test0 %08x stsr %08x\n", 3013 sc->sc_dev.dv_xname, bits, test0, stsr); 3014 } 3015 3016 if ((bits & ATW_NAR_SR) != 0 && (stsr & ATW_INTR_RPS) == 0 && 3017 (test0 & ATW_TEST0_RS_MASK) != ATW_TEST0_RS_STOPPED) { 3018 DPRINTF2(sc, ("%s: receive process not idle [%s]\n", 3019 sc->sc_dev.dv_xname, 3020 atw_rx_state[__SHIFTOUT(test0, ATW_TEST0_RS_MASK)])); 3021 DPRINTF2(sc, ("%s: bits %08x test0 %08x stsr %08x\n", 3022 sc->sc_dev.dv_xname, bits, test0, stsr)); 3023 } 3024 out: 3025 if ((bits & ATW_NAR_ST) != 0) 3026 atw_txdrain(sc); 3027 splx(s); 3028 return; 3029 } 3030 3031 /* 3032 * atw_linkintr: 3033 * 3034 * Helper; handle link-status interrupts. 3035 */ 3036 void 3037 atw_linkintr(struct atw_softc *sc, u_int32_t linkstatus) 3038 { 3039 struct ieee80211com *ic = &sc->sc_ic; 3040 3041 if (ic->ic_state != IEEE80211_S_RUN) 3042 return; 3043 3044 if (linkstatus & ATW_INTR_LINKON) { 3045 DPRINTF(sc, ("%s: link on\n", sc->sc_dev.dv_xname)); 3046 sc->sc_rescan_timer = 0; 3047 } else if (linkstatus & ATW_INTR_LINKOFF) { 3048 DPRINTF(sc, ("%s: link off\n", sc->sc_dev.dv_xname)); 3049 if (ic->ic_opmode != IEEE80211_M_STA) 3050 return; 3051 sc->sc_rescan_timer = 3; 3052 sc->sc_if.if_timer = 1; 3053 } 3054 } 3055 3056 static inline int 3057 atw_hw_decrypted(struct atw_softc *sc, struct ieee80211_frame_min *wh) 3058 { 3059 if ((sc->sc_ic.ic_flags & IEEE80211_F_PRIVACY) == 0) 3060 return 0; 3061 if ((wh->i_fc[1] & IEEE80211_FC1_WEP) == 0) 3062 return 0; 3063 return (sc->sc_wepctl & ATW_WEPCTL_WEPRXBYP) == 0; 3064 } 3065 3066 /* 3067 * atw_rxintr: 3068 * 3069 * Helper; handle receive interrupts. 3070 */ 3071 void 3072 atw_rxintr(struct atw_softc *sc) 3073 { 3074 static int rate_tbl[] = {2, 4, 11, 22, 44}; 3075 struct ieee80211com *ic = &sc->sc_ic; 3076 struct ieee80211_node *ni; 3077 struct ieee80211_frame_min *wh; 3078 struct ifnet *ifp = &sc->sc_if; 3079 struct atw_rxsoft *rxs; 3080 struct mbuf *m; 3081 u_int32_t rxstat; 3082 int i, len, rate, rate0; 3083 u_int32_t rssi, rssi0; 3084 3085 for (i = sc->sc_rxptr;; i = ATW_NEXTRX(i)) { 3086 rxs = &sc->sc_rxsoft[i]; 3087 3088 ATW_CDRXSYNC(sc, i, BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3089 3090 rxstat = le32toh(sc->sc_rxdescs[i].ar_stat); 3091 rssi0 = le32toh(sc->sc_rxdescs[i].ar_rssi); 3092 rate0 = __SHIFTOUT(rxstat, ATW_RXSTAT_RXDR_MASK); 3093 3094 if (rxstat & ATW_RXSTAT_OWN) 3095 break; /* We have processed all receive buffers. */ 3096 3097 DPRINTF3(sc, 3098 ("%s: rx stat %08x rssi0 %08x buf1 %08x buf2 %08x\n", 3099 sc->sc_dev.dv_xname, 3100 rxstat, rssi0, 3101 le32toh(sc->sc_rxdescs[i].ar_buf1), 3102 le32toh(sc->sc_rxdescs[i].ar_buf2))); 3103 3104 /* 3105 * Make sure the packet fits in one buffer. This should 3106 * always be the case. 3107 */ 3108 if ((rxstat & (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) != 3109 (ATW_RXSTAT_FS|ATW_RXSTAT_LS)) { 3110 printf("%s: incoming packet spilled, resetting\n", 3111 sc->sc_dev.dv_xname); 3112 (void)atw_init(ifp); 3113 return; 3114 } 3115 3116 /* 3117 * If an error occurred, update stats, clear the status 3118 * word, and leave the packet buffer in place. It will 3119 * simply be reused the next time the ring comes around. 3120 * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long 3121 * error. 3122 */ 3123 3124 if ((rxstat & ATW_RXSTAT_ES) != 0 && 3125 ((sc->sc_ec.ec_capenable & ETHERCAP_VLAN_MTU) == 0 || 3126 (rxstat & (ATW_RXSTAT_DE | ATW_RXSTAT_SFDE | 3127 ATW_RXSTAT_SIGE | ATW_RXSTAT_CRC16E | 3128 ATW_RXSTAT_RXTOE | ATW_RXSTAT_CRC32E | 3129 ATW_RXSTAT_ICVE)) != 0)) { 3130 #define PRINTERR(bit, str) \ 3131 if (rxstat & (bit)) \ 3132 printf("%s: receive error: %s\n", \ 3133 sc->sc_dev.dv_xname, str) 3134 ifp->if_ierrors++; 3135 PRINTERR(ATW_RXSTAT_DE, "descriptor error"); 3136 PRINTERR(ATW_RXSTAT_SFDE, "PLCP SFD error"); 3137 PRINTERR(ATW_RXSTAT_SIGE, "PLCP signal error"); 3138 PRINTERR(ATW_RXSTAT_CRC16E, "PLCP CRC16 error"); 3139 PRINTERR(ATW_RXSTAT_RXTOE, "time-out"); 3140 PRINTERR(ATW_RXSTAT_CRC32E, "FCS error"); 3141 PRINTERR(ATW_RXSTAT_ICVE, "WEP ICV error"); 3142 #undef PRINTERR 3143 ATW_INIT_RXDESC(sc, i); 3144 continue; 3145 } 3146 3147 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3148 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD); 3149 3150 /* 3151 * No errors; receive the packet. Note the ADM8211 3152 * includes the CRC in promiscuous mode. 3153 */ 3154 len = __SHIFTOUT(rxstat, ATW_RXSTAT_FL_MASK); 3155 3156 /* 3157 * Allocate a new mbuf cluster. If that fails, we are 3158 * out of memory, and must drop the packet and recycle 3159 * the buffer that's already attached to this descriptor. 3160 */ 3161 m = rxs->rxs_mbuf; 3162 if (atw_add_rxbuf(sc, i) != 0) { 3163 ifp->if_ierrors++; 3164 ATW_INIT_RXDESC(sc, i); 3165 bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0, 3166 rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD); 3167 continue; 3168 } 3169 3170 ifp->if_ipackets++; 3171 if (sc->sc_opmode & ATW_NAR_PR) 3172 len -= IEEE80211_CRC_LEN; 3173 m->m_pkthdr.rcvif = ifp; 3174 m->m_pkthdr.len = m->m_len = MIN(m->m_ext.ext_size, len); 3175 3176 if (rate0 >= sizeof(rate_tbl) / sizeof(rate_tbl[0])) 3177 rate = 0; 3178 else 3179 rate = rate_tbl[rate0]; 3180 3181 /* The RSSI comes straight from a register in the 3182 * baseband processor. I know that for the RF3000, 3183 * the RSSI register also contains the antenna-selection 3184 * bits. Mask those off. 3185 * 3186 * TBD Treat other basebands. 3187 */ 3188 if (sc->sc_bbptype == ATW_BBPTYPE_RFMD) 3189 rssi = rssi0 & RF3000_RSSI_MASK; 3190 else 3191 rssi = rssi0; 3192 3193 #if NBPFILTER > 0 3194 /* Pass this up to any BPF listeners. */ 3195 if (sc->sc_radiobpf != NULL) { 3196 struct atw_rx_radiotap_header *tap = &sc->sc_rxtap; 3197 3198 tap->ar_rate = rate; 3199 tap->ar_chan_freq = htole16(ic->ic_curchan->ic_freq); 3200 tap->ar_chan_flags = htole16(ic->ic_curchan->ic_flags); 3201 3202 /* TBD verify units are dB */ 3203 tap->ar_antsignal = (int)rssi; 3204 /* TBD tap->ar_flags */ 3205 3206 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3207 tap->ar_ihdr.it_len, m); 3208 } 3209 #endif /* NPBFILTER > 0 */ 3210 3211 wh = mtod(m, struct ieee80211_frame_min *); 3212 ni = ieee80211_find_rxnode(ic, wh); 3213 #if 0 3214 if (atw_hw_decrypted(sc, wh)) { 3215 wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 3216 DPRINTF(sc, ("%s: hw decrypted\n", __func__)); 3217 } 3218 #endif 3219 ieee80211_input(ic, m, ni, (int)rssi, 0); 3220 ieee80211_free_node(ni); 3221 } 3222 3223 /* Update the receive pointer. */ 3224 sc->sc_rxptr = i; 3225 } 3226 3227 /* 3228 * atw_txintr: 3229 * 3230 * Helper; handle transmit interrupts. 3231 */ 3232 void 3233 atw_txintr(struct atw_softc *sc) 3234 { 3235 #define TXSTAT_ERRMASK (ATW_TXSTAT_TUF | ATW_TXSTAT_TLT | ATW_TXSTAT_TRT | \ 3236 ATW_TXSTAT_TRO | ATW_TXSTAT_SOFBR) 3237 #define TXSTAT_FMT "\2\31ATW_TXSTAT_SOFBR\32ATW_TXSTAT_TRO\33ATW_TXSTAT_TUF" \ 3238 "\34ATW_TXSTAT_TRT\35ATW_TXSTAT_TLT" 3239 3240 static char txstat_buf[sizeof("ffffffff<>" TXSTAT_FMT)]; 3241 struct ifnet *ifp = &sc->sc_if; 3242 struct atw_txsoft *txs; 3243 u_int32_t txstat; 3244 3245 DPRINTF3(sc, ("%s: atw_txintr: sc_flags 0x%08x\n", 3246 sc->sc_dev.dv_xname, sc->sc_flags)); 3247 3248 /* 3249 * Go through our Tx list and free mbufs for those 3250 * frames that have been transmitted. 3251 */ 3252 while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) { 3253 ATW_CDTXSYNC(sc, txs->txs_lastdesc, 1, 3254 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3255 3256 #ifdef ATW_DEBUG 3257 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3258 int i; 3259 printf(" txsoft %p transmit chain:\n", txs); 3260 ATW_CDTXSYNC(sc, txs->txs_firstdesc, 3261 txs->txs_ndescs - 1, 3262 BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); 3263 for (i = txs->txs_firstdesc;; i = ATW_NEXTTX(i)) { 3264 printf(" descriptor %d:\n", i); 3265 printf(" at_status: 0x%08x\n", 3266 le32toh(sc->sc_txdescs[i].at_stat)); 3267 printf(" at_flags: 0x%08x\n", 3268 le32toh(sc->sc_txdescs[i].at_flags)); 3269 printf(" at_buf1: 0x%08x\n", 3270 le32toh(sc->sc_txdescs[i].at_buf1)); 3271 printf(" at_buf2: 0x%08x\n", 3272 le32toh(sc->sc_txdescs[i].at_buf2)); 3273 if (i == txs->txs_lastdesc) 3274 break; 3275 } 3276 } 3277 #endif 3278 3279 txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].at_stat); 3280 if (txstat & ATW_TXSTAT_OWN) 3281 break; 3282 3283 SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q); 3284 3285 sc->sc_txfree += txs->txs_ndescs; 3286 3287 bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap, 3288 0, txs->txs_dmamap->dm_mapsize, 3289 BUS_DMASYNC_POSTWRITE); 3290 bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap); 3291 m_freem(txs->txs_mbuf); 3292 txs->txs_mbuf = NULL; 3293 3294 SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q); 3295 3296 KASSERT(!(SIMPLEQ_EMPTY(&sc->sc_txfreeq) || 3297 sc->sc_txfree == 0)); 3298 ifp->if_flags &= ~IFF_OACTIVE; 3299 3300 if ((ifp->if_flags & IFF_DEBUG) != 0 && 3301 (txstat & TXSTAT_ERRMASK) != 0) { 3302 bitmask_snprintf(txstat & TXSTAT_ERRMASK, TXSTAT_FMT, 3303 txstat_buf, sizeof(txstat_buf)); 3304 printf("%s: txstat %s %" __PRIuBITS "\n", 3305 sc->sc_dev.dv_xname, txstat_buf, 3306 __SHIFTOUT(txstat, ATW_TXSTAT_ARC_MASK)); 3307 } 3308 3309 /* 3310 * Check for errors and collisions. 3311 */ 3312 if (txstat & ATW_TXSTAT_TUF) 3313 sc->sc_stats.ts_tx_tuf++; 3314 if (txstat & ATW_TXSTAT_TLT) 3315 sc->sc_stats.ts_tx_tlt++; 3316 if (txstat & ATW_TXSTAT_TRT) 3317 sc->sc_stats.ts_tx_trt++; 3318 if (txstat & ATW_TXSTAT_TRO) 3319 sc->sc_stats.ts_tx_tro++; 3320 if (txstat & ATW_TXSTAT_SOFBR) { 3321 sc->sc_stats.ts_tx_sofbr++; 3322 } 3323 3324 if ((txstat & ATW_TXSTAT_ES) == 0) 3325 ifp->if_collisions += 3326 __SHIFTOUT(txstat, ATW_TXSTAT_ARC_MASK); 3327 else 3328 ifp->if_oerrors++; 3329 3330 ifp->if_opackets++; 3331 } 3332 3333 /* 3334 * If there are no more pending transmissions, cancel the watchdog 3335 * timer. 3336 */ 3337 if (txs == NULL) { 3338 KASSERT((ifp->if_flags & IFF_OACTIVE) == 0); 3339 sc->sc_tx_timer = 0; 3340 } 3341 #undef TXSTAT_ERRMASK 3342 #undef TXSTAT_FMT 3343 } 3344 3345 /* 3346 * atw_watchdog: [ifnet interface function] 3347 * 3348 * Watchdog timer handler. 3349 */ 3350 void 3351 atw_watchdog(struct ifnet *ifp) 3352 { 3353 struct atw_softc *sc = ifp->if_softc; 3354 struct ieee80211com *ic = &sc->sc_ic; 3355 3356 ifp->if_timer = 0; 3357 if (ATW_IS_ENABLED(sc) == 0) 3358 return; 3359 3360 if (sc->sc_rescan_timer) { 3361 if (--sc->sc_rescan_timer == 0) 3362 (void)ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3363 } 3364 if (sc->sc_tx_timer) { 3365 if (--sc->sc_tx_timer == 0 && 3366 !SIMPLEQ_EMPTY(&sc->sc_txdirtyq)) { 3367 printf("%s: transmit timeout\n", ifp->if_xname); 3368 ifp->if_oerrors++; 3369 (void)atw_init(ifp); 3370 atw_start(ifp); 3371 } 3372 } 3373 if (sc->sc_tx_timer != 0 || sc->sc_rescan_timer != 0) 3374 ifp->if_timer = 1; 3375 ieee80211_watchdog(ic); 3376 } 3377 3378 #ifdef ATW_DEBUG 3379 static void 3380 atw_dump_pkt(struct ifnet *ifp, struct mbuf *m0) 3381 { 3382 struct atw_softc *sc = ifp->if_softc; 3383 struct mbuf *m; 3384 int i, noctets = 0; 3385 3386 printf("%s: %d-byte packet\n", sc->sc_dev.dv_xname, 3387 m0->m_pkthdr.len); 3388 3389 for (m = m0; m; m = m->m_next) { 3390 if (m->m_len == 0) 3391 continue; 3392 for (i = 0; i < m->m_len; i++) { 3393 printf(" %02x", ((u_int8_t*)m->m_data)[i]); 3394 if (++noctets % 24 == 0) 3395 printf("\n"); 3396 } 3397 } 3398 printf("%s%s: %d bytes emitted\n", 3399 (noctets % 24 != 0) ? "\n" : "", sc->sc_dev.dv_xname, noctets); 3400 } 3401 #endif /* ATW_DEBUG */ 3402 3403 /* 3404 * atw_start: [ifnet interface function] 3405 * 3406 * Start packet transmission on the interface. 3407 */ 3408 void 3409 atw_start(struct ifnet *ifp) 3410 { 3411 struct atw_softc *sc = ifp->if_softc; 3412 struct ieee80211_key *k; 3413 struct ieee80211com *ic = &sc->sc_ic; 3414 struct ieee80211_node *ni; 3415 struct ieee80211_frame_min *whm; 3416 struct ieee80211_frame *wh; 3417 struct atw_frame *hh; 3418 struct mbuf *m0, *m; 3419 struct atw_txsoft *txs, *last_txs; 3420 struct atw_txdesc *txd; 3421 int npkt, rate; 3422 bus_dmamap_t dmamap; 3423 int ctl, error, firsttx, nexttx, lasttx, first, ofree, seg; 3424 3425 DPRINTF2(sc, ("%s: atw_start: sc_flags 0x%08x, if_flags 0x%08x\n", 3426 sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags)); 3427 3428 if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING) 3429 return; 3430 3431 /* 3432 * Remember the previous number of free descriptors and 3433 * the first descriptor we'll use. 3434 */ 3435 ofree = sc->sc_txfree; 3436 firsttx = lasttx = sc->sc_txnext; 3437 3438 DPRINTF2(sc, ("%s: atw_start: txfree %d, txnext %d\n", 3439 sc->sc_dev.dv_xname, ofree, firsttx)); 3440 3441 /* 3442 * Loop through the send queue, setting up transmit descriptors 3443 * until we drain the queue, or use up all available transmit 3444 * descriptors. 3445 */ 3446 while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL && 3447 sc->sc_txfree != 0) { 3448 3449 /* 3450 * Grab a packet off the management queue, if it 3451 * is not empty. Otherwise, from the data queue. 3452 */ 3453 IF_DEQUEUE(&ic->ic_mgtq, m0); 3454 if (m0 != NULL) { 3455 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 3456 m0->m_pkthdr.rcvif = NULL; 3457 } else if (ic->ic_state != IEEE80211_S_RUN) 3458 break; /* send no data until associated */ 3459 else { 3460 IFQ_DEQUEUE(&ifp->if_snd, m0); 3461 if (m0 == NULL) 3462 break; 3463 #if NBPFILTER > 0 3464 if (ifp->if_bpf != NULL) 3465 bpf_mtap(ifp->if_bpf, m0); 3466 #endif /* NBPFILTER > 0 */ 3467 ni = ieee80211_find_txnode(ic, 3468 mtod(m0, struct ether_header *)->ether_dhost); 3469 if (ni == NULL) { 3470 ifp->if_oerrors++; 3471 break; 3472 } 3473 if ((m0 = ieee80211_encap(ic, m0, ni)) == NULL) { 3474 ieee80211_free_node(ni); 3475 ifp->if_oerrors++; 3476 break; 3477 } 3478 } 3479 3480 rate = MAX(ieee80211_get_rate(ni), 2); 3481 3482 whm = mtod(m0, struct ieee80211_frame_min *); 3483 3484 if ((whm->i_fc[1] & IEEE80211_FC1_WEP) == 0) 3485 k = NULL; 3486 else if ((k = ieee80211_crypto_encap(ic, ni, m0)) == NULL) { 3487 m_freem(m0); 3488 ieee80211_free_node(ni); 3489 ifp->if_oerrors++; 3490 break; 3491 } 3492 3493 if (ieee80211_compute_duration(whm, k, m0->m_pkthdr.len, 3494 ic->ic_flags, ic->ic_fragthreshold, rate, 3495 &txs->txs_d0, &txs->txs_dn, &npkt, 0) == -1) { 3496 DPRINTF2(sc, ("%s: fail compute duration\n", __func__)); 3497 m_freem(m0); 3498 break; 3499 } 3500 3501 /* XXX Misleading if fragmentation is enabled. Better 3502 * to fragment in software? 3503 */ 3504 *(uint16_t *)whm->i_dur = htole16(txs->txs_d0.d_rts_dur); 3505 3506 #if NBPFILTER > 0 3507 /* 3508 * Pass the packet to any BPF listeners. 3509 */ 3510 if (ic->ic_rawbpf != NULL) 3511 bpf_mtap((caddr_t)ic->ic_rawbpf, m0); 3512 3513 if (sc->sc_radiobpf != NULL) { 3514 struct atw_tx_radiotap_header *tap = &sc->sc_txtap; 3515 3516 tap->at_rate = rate; 3517 tap->at_chan_freq = htole16(ic->ic_curchan->ic_freq); 3518 tap->at_chan_flags = htole16(ic->ic_curchan->ic_flags); 3519 3520 /* TBD tap->at_flags */ 3521 3522 bpf_mtap2(sc->sc_radiobpf, (caddr_t)tap, 3523 tap->at_ihdr.it_len, m0); 3524 } 3525 #endif /* NBPFILTER > 0 */ 3526 3527 M_PREPEND(m0, offsetof(struct atw_frame, atw_ihdr), M_DONTWAIT); 3528 3529 if (ni != NULL) 3530 ieee80211_free_node(ni); 3531 3532 if (m0 == NULL) { 3533 ifp->if_oerrors++; 3534 break; 3535 } 3536 3537 /* just to make sure. */ 3538 m0 = m_pullup(m0, sizeof(struct atw_frame)); 3539 3540 if (m0 == NULL) { 3541 ifp->if_oerrors++; 3542 break; 3543 } 3544 3545 hh = mtod(m0, struct atw_frame *); 3546 wh = &hh->atw_ihdr; 3547 3548 /* Copy everything we need from the 802.11 header: 3549 * Frame Control; address 1, address 3, or addresses 3550 * 3 and 4. NIC fills in BSSID, SA. 3551 */ 3552 if (wh->i_fc[1] & IEEE80211_FC1_DIR_TODS) { 3553 if (wh->i_fc[1] & IEEE80211_FC1_DIR_FROMDS) 3554 panic("%s: illegal WDS frame", 3555 sc->sc_dev.dv_xname); 3556 memcpy(hh->atw_dst, wh->i_addr3, IEEE80211_ADDR_LEN); 3557 } else 3558 memcpy(hh->atw_dst, wh->i_addr1, IEEE80211_ADDR_LEN); 3559 3560 *(u_int16_t*)hh->atw_fc = *(u_int16_t*)wh->i_fc; 3561 3562 /* initialize remaining Tx parameters */ 3563 memset(&hh->u, 0, sizeof(hh->u)); 3564 3565 hh->atw_rate = rate * 5; 3566 /* XXX this could be incorrect if M_FCS. _encap should 3567 * probably strip FCS just in case it sticks around in 3568 * bridged packets. 3569 */ 3570 hh->atw_service = 0x00; /* XXX guess */ 3571 hh->atw_paylen = htole16(m0->m_pkthdr.len - 3572 sizeof(struct atw_frame)); 3573 3574 hh->atw_fragthr = htole16(ic->ic_fragthreshold); 3575 hh->atw_rtylmt = 3; 3576 hh->atw_hdrctl = htole16(ATW_HDRCTL_UNKNOWN1); 3577 #if 0 3578 if (do_encrypt) { 3579 hh->atw_hdrctl |= htole16(ATW_HDRCTL_WEP); 3580 hh->atw_keyid = ic->ic_def_txkey; 3581 } 3582 #endif 3583 3584 hh->atw_head_plcplen = htole16(txs->txs_d0.d_plcp_len); 3585 hh->atw_tail_plcplen = htole16(txs->txs_dn.d_plcp_len); 3586 if (txs->txs_d0.d_residue) 3587 hh->atw_head_plcplen |= htole16(0x8000); 3588 if (txs->txs_dn.d_residue) 3589 hh->atw_tail_plcplen |= htole16(0x8000); 3590 hh->atw_head_dur = htole16(txs->txs_d0.d_rts_dur); 3591 hh->atw_tail_dur = htole16(txs->txs_dn.d_rts_dur); 3592 3593 /* never fragment multicast frames */ 3594 if (IEEE80211_IS_MULTICAST(hh->atw_dst)) { 3595 hh->atw_fragthr = htole16(ic->ic_fragthreshold); 3596 } else if (sc->sc_flags & ATWF_RTSCTS) { 3597 hh->atw_hdrctl |= htole16(ATW_HDRCTL_RTSCTS); 3598 } 3599 3600 #ifdef ATW_DEBUG 3601 hh->atw_fragnum = 0; 3602 3603 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3604 printf("%s: dst = %s, rate = 0x%02x, " 3605 "service = 0x%02x, paylen = 0x%04x\n", 3606 sc->sc_dev.dv_xname, ether_sprintf(hh->atw_dst), 3607 hh->atw_rate, hh->atw_service, hh->atw_paylen); 3608 3609 printf("%s: fc[0] = 0x%02x, fc[1] = 0x%02x, " 3610 "dur1 = 0x%04x, dur2 = 0x%04x, " 3611 "dur3 = 0x%04x, rts_dur = 0x%04x\n", 3612 sc->sc_dev.dv_xname, hh->atw_fc[0], hh->atw_fc[1], 3613 hh->atw_tail_plcplen, hh->atw_head_plcplen, 3614 hh->atw_tail_dur, hh->atw_head_dur); 3615 3616 printf("%s: hdrctl = 0x%04x, fragthr = 0x%04x, " 3617 "fragnum = 0x%02x, rtylmt = 0x%04x\n", 3618 sc->sc_dev.dv_xname, hh->atw_hdrctl, 3619 hh->atw_fragthr, hh->atw_fragnum, hh->atw_rtylmt); 3620 3621 printf("%s: keyid = %d\n", 3622 sc->sc_dev.dv_xname, hh->atw_keyid); 3623 3624 atw_dump_pkt(ifp, m0); 3625 } 3626 #endif /* ATW_DEBUG */ 3627 3628 dmamap = txs->txs_dmamap; 3629 3630 /* 3631 * Load the DMA map. Copy and try (once) again if the packet 3632 * didn't fit in the alloted number of segments. 3633 */ 3634 for (first = 1; 3635 (error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0, 3636 BUS_DMA_WRITE|BUS_DMA_NOWAIT)) != 0 && first; 3637 first = 0) { 3638 MGETHDR(m, M_DONTWAIT, MT_DATA); 3639 if (m == NULL) { 3640 printf("%s: unable to allocate Tx mbuf\n", 3641 sc->sc_dev.dv_xname); 3642 break; 3643 } 3644 if (m0->m_pkthdr.len > MHLEN) { 3645 MCLGET(m, M_DONTWAIT); 3646 if ((m->m_flags & M_EXT) == 0) { 3647 printf("%s: unable to allocate Tx " 3648 "cluster\n", sc->sc_dev.dv_xname); 3649 m_freem(m); 3650 break; 3651 } 3652 } 3653 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t)); 3654 m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len; 3655 m_freem(m0); 3656 m0 = m; 3657 m = NULL; 3658 } 3659 if (error != 0) { 3660 printf("%s: unable to load Tx buffer, " 3661 "error = %d\n", sc->sc_dev.dv_xname, error); 3662 m_freem(m0); 3663 break; 3664 } 3665 3666 /* 3667 * Ensure we have enough descriptors free to describe 3668 * the packet. 3669 */ 3670 if (dmamap->dm_nsegs > sc->sc_txfree) { 3671 /* 3672 * Not enough free descriptors to transmit 3673 * this packet. Unload the DMA map and 3674 * drop the packet. Notify the upper layer 3675 * that there are no more slots left. 3676 * 3677 * XXX We could allocate an mbuf and copy, but 3678 * XXX it is worth it? 3679 */ 3680 bus_dmamap_unload(sc->sc_dmat, dmamap); 3681 m_freem(m0); 3682 break; 3683 } 3684 3685 /* 3686 * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET. 3687 */ 3688 3689 /* Sync the DMA map. */ 3690 bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize, 3691 BUS_DMASYNC_PREWRITE); 3692 3693 /* XXX arbitrary retry limit; 8 because I have seen it in 3694 * use already and maybe 0 means "no tries" ! 3695 */ 3696 ctl = htole32(__SHIFTIN(8, ATW_TXCTL_TL_MASK)); 3697 3698 DPRINTF2(sc, ("%s: TXDR <- max(10, %d)\n", 3699 sc->sc_dev.dv_xname, rate * 5)); 3700 ctl |= htole32(__SHIFTIN(MAX(10, rate * 5), ATW_TXCTL_TXDR_MASK)); 3701 3702 /* 3703 * Initialize the transmit descriptors. 3704 */ 3705 for (nexttx = sc->sc_txnext, seg = 0; 3706 seg < dmamap->dm_nsegs; 3707 seg++, nexttx = ATW_NEXTTX(nexttx)) { 3708 /* 3709 * If this is the first descriptor we're 3710 * enqueueing, don't set the OWN bit just 3711 * yet. That could cause a race condition. 3712 * We'll do it below. 3713 */ 3714 txd = &sc->sc_txdescs[nexttx]; 3715 txd->at_ctl = ctl | 3716 ((nexttx == firsttx) ? 0 : htole32(ATW_TXCTL_OWN)); 3717 3718 txd->at_buf1 = htole32(dmamap->dm_segs[seg].ds_addr); 3719 txd->at_flags = 3720 htole32(__SHIFTIN(dmamap->dm_segs[seg].ds_len, 3721 ATW_TXFLAG_TBS1_MASK)) | 3722 ((nexttx == (ATW_NTXDESC - 1)) 3723 ? htole32(ATW_TXFLAG_TER) : 0); 3724 lasttx = nexttx; 3725 } 3726 3727 /* Set `first segment' and `last segment' appropriately. */ 3728 sc->sc_txdescs[sc->sc_txnext].at_flags |= 3729 htole32(ATW_TXFLAG_FS); 3730 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_LS); 3731 3732 #ifdef ATW_DEBUG 3733 if ((ifp->if_flags & IFF_DEBUG) != 0 && atw_debug > 2) { 3734 printf(" txsoft %p transmit chain:\n", txs); 3735 for (seg = sc->sc_txnext;; seg = ATW_NEXTTX(seg)) { 3736 printf(" descriptor %d:\n", seg); 3737 printf(" at_ctl: 0x%08x\n", 3738 le32toh(sc->sc_txdescs[seg].at_ctl)); 3739 printf(" at_flags: 0x%08x\n", 3740 le32toh(sc->sc_txdescs[seg].at_flags)); 3741 printf(" at_buf1: 0x%08x\n", 3742 le32toh(sc->sc_txdescs[seg].at_buf1)); 3743 printf(" at_buf2: 0x%08x\n", 3744 le32toh(sc->sc_txdescs[seg].at_buf2)); 3745 if (seg == lasttx) 3746 break; 3747 } 3748 } 3749 #endif 3750 3751 /* Sync the descriptors we're using. */ 3752 ATW_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs, 3753 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3754 3755 /* 3756 * Store a pointer to the packet so we can free it later, 3757 * and remember what txdirty will be once the packet is 3758 * done. 3759 */ 3760 txs->txs_mbuf = m0; 3761 txs->txs_firstdesc = sc->sc_txnext; 3762 txs->txs_lastdesc = lasttx; 3763 txs->txs_ndescs = dmamap->dm_nsegs; 3764 3765 /* Advance the tx pointer. */ 3766 sc->sc_txfree -= dmamap->dm_nsegs; 3767 sc->sc_txnext = nexttx; 3768 3769 SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q); 3770 SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q); 3771 3772 last_txs = txs; 3773 } 3774 3775 if (sc->sc_txfree != ofree) { 3776 DPRINTF2(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n", 3777 sc->sc_dev.dv_xname, lasttx, firsttx)); 3778 /* 3779 * Cause a transmit interrupt to happen on the 3780 * last packet we enqueued. 3781 */ 3782 sc->sc_txdescs[lasttx].at_flags |= htole32(ATW_TXFLAG_IC); 3783 ATW_CDTXSYNC(sc, lasttx, 1, 3784 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3785 3786 /* 3787 * The entire packet chain is set up. Give the 3788 * first descriptor to the chip now. 3789 */ 3790 sc->sc_txdescs[firsttx].at_ctl |= htole32(ATW_TXCTL_OWN); 3791 ATW_CDTXSYNC(sc, firsttx, 1, 3792 BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); 3793 3794 /* Wake up the transmitter. */ 3795 ATW_WRITE(sc, ATW_TDR, 0x1); 3796 3797 if (txs == NULL || sc->sc_txfree == 0) 3798 ifp->if_flags |= IFF_OACTIVE; 3799 3800 /* Set a watchdog timer in case the chip flakes out. */ 3801 sc->sc_tx_timer = 5; 3802 ifp->if_timer = 1; 3803 } 3804 } 3805 3806 /* 3807 * atw_power: 3808 * 3809 * Power management (suspend/resume) hook. 3810 */ 3811 void 3812 atw_power(int why, void *arg) 3813 { 3814 struct atw_softc *sc = arg; 3815 struct ifnet *ifp = &sc->sc_if; 3816 int s; 3817 3818 DPRINTF(sc, ("%s: atw_power(%d,)\n", sc->sc_dev.dv_xname, why)); 3819 3820 s = splnet(); 3821 switch (why) { 3822 case PWR_STANDBY: 3823 /* XXX do nothing. */ 3824 break; 3825 case PWR_SUSPEND: 3826 atw_stop(ifp, 0); 3827 if (sc->sc_power != NULL) 3828 (*sc->sc_power)(sc, why); 3829 break; 3830 case PWR_RESUME: 3831 if (ifp->if_flags & IFF_UP) { 3832 if (sc->sc_power != NULL) 3833 (*sc->sc_power)(sc, why); 3834 atw_init(ifp); 3835 } 3836 break; 3837 case PWR_SOFTSUSPEND: 3838 case PWR_SOFTSTANDBY: 3839 case PWR_SOFTRESUME: 3840 break; 3841 } 3842 splx(s); 3843 } 3844 3845 /* 3846 * atw_ioctl: [ifnet interface function] 3847 * 3848 * Handle control requests from the operator. 3849 */ 3850 int 3851 atw_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 3852 { 3853 struct atw_softc *sc = ifp->if_softc; 3854 struct ifreq *ifr = (struct ifreq *)data; 3855 int s, error = 0; 3856 3857 /* XXX monkey see, monkey do. comes from wi_ioctl. */ 3858 if (!device_is_active(&sc->sc_dev)) 3859 return ENXIO; 3860 3861 s = splnet(); 3862 3863 switch (cmd) { 3864 case SIOCSIFFLAGS: 3865 if (ifp->if_flags & IFF_UP) { 3866 if (ATW_IS_ENABLED(sc)) { 3867 /* 3868 * To avoid rescanning another access point, 3869 * do not call atw_init() here. Instead, 3870 * only reflect media settings. 3871 */ 3872 atw_filter_setup(sc); 3873 } else 3874 error = atw_init(ifp); 3875 } else if (ATW_IS_ENABLED(sc)) 3876 atw_stop(ifp, 1); 3877 break; 3878 case SIOCADDMULTI: 3879 case SIOCDELMULTI: 3880 error = (cmd == SIOCADDMULTI) ? 3881 ether_addmulti(ifr, &sc->sc_ec) : 3882 ether_delmulti(ifr, &sc->sc_ec); 3883 if (error == ENETRESET) { 3884 if (ifp->if_flags & IFF_RUNNING) 3885 atw_filter_setup(sc); /* do not rescan */ 3886 error = 0; 3887 } 3888 break; 3889 default: 3890 error = ieee80211_ioctl(&sc->sc_ic, cmd, data); 3891 if (error == ENETRESET || error == ERESTART) { 3892 if (is_running(ifp)) 3893 error = atw_init(ifp); 3894 else 3895 error = 0; 3896 } 3897 break; 3898 } 3899 3900 /* Try to get more packets going. */ 3901 if (ATW_IS_ENABLED(sc)) 3902 atw_start(ifp); 3903 3904 splx(s); 3905 return (error); 3906 } 3907 3908 static int 3909 atw_media_change(struct ifnet *ifp) 3910 { 3911 int error; 3912 3913 error = ieee80211_media_change(ifp); 3914 if (error == ENETRESET) { 3915 if (is_running(ifp)) 3916 error = atw_init(ifp); 3917 else 3918 error = 0; 3919 } 3920 return error; 3921 }
Cache object: 80df769a192a0ca5f883dfd6649a998e
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]