1 2 /*- 3 * Copyright (c) 2006 4 * Damien Bergamini <damien.bergamini@free.fr> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <sys/cdefs.h> 20 __FBSDID("$FreeBSD$"); 21 22 /*- 23 * Ralink Technology RT2561, RT2561S and RT2661 chipset driver 24 * http://www.ralinktech.com/ 25 */ 26 27 #include <sys/param.h> 28 #include <sys/sysctl.h> 29 #include <sys/sockio.h> 30 #include <sys/mbuf.h> 31 #include <sys/kernel.h> 32 #include <sys/socket.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/lock.h> 36 #include <sys/mutex.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/endian.h> 40 #include <sys/firmware.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 #include <sys/rman.h> 45 46 #include <net/bpf.h> 47 #include <net/if.h> 48 #include <net/if_var.h> 49 #include <net/if_arp.h> 50 #include <net/ethernet.h> 51 #include <net/if_dl.h> 52 #include <net/if_media.h> 53 #include <net/if_types.h> 54 55 #include <net80211/ieee80211_var.h> 56 #include <net80211/ieee80211_radiotap.h> 57 #include <net80211/ieee80211_regdomain.h> 58 #include <net80211/ieee80211_ratectl.h> 59 60 #include <netinet/in.h> 61 #include <netinet/in_systm.h> 62 #include <netinet/in_var.h> 63 #include <netinet/ip.h> 64 #include <netinet/if_ether.h> 65 66 #include <dev/ral/rt2661reg.h> 67 #include <dev/ral/rt2661var.h> 68 69 #define RAL_DEBUG 70 #ifdef RAL_DEBUG 71 #define DPRINTF(sc, fmt, ...) do { \ 72 if (sc->sc_debug > 0) \ 73 printf(fmt, __VA_ARGS__); \ 74 } while (0) 75 #define DPRINTFN(sc, n, fmt, ...) do { \ 76 if (sc->sc_debug >= (n)) \ 77 printf(fmt, __VA_ARGS__); \ 78 } while (0) 79 #else 80 #define DPRINTF(sc, fmt, ...) 81 #define DPRINTFN(sc, n, fmt, ...) 82 #endif 83 84 static struct ieee80211vap *rt2661_vap_create(struct ieee80211com *, 85 const char [IFNAMSIZ], int, enum ieee80211_opmode, 86 int, const uint8_t [IEEE80211_ADDR_LEN], 87 const uint8_t [IEEE80211_ADDR_LEN]); 88 static void rt2661_vap_delete(struct ieee80211vap *); 89 static void rt2661_dma_map_addr(void *, bus_dma_segment_t *, int, 90 int); 91 static int rt2661_alloc_tx_ring(struct rt2661_softc *, 92 struct rt2661_tx_ring *, int); 93 static void rt2661_reset_tx_ring(struct rt2661_softc *, 94 struct rt2661_tx_ring *); 95 static void rt2661_free_tx_ring(struct rt2661_softc *, 96 struct rt2661_tx_ring *); 97 static int rt2661_alloc_rx_ring(struct rt2661_softc *, 98 struct rt2661_rx_ring *, int); 99 static void rt2661_reset_rx_ring(struct rt2661_softc *, 100 struct rt2661_rx_ring *); 101 static void rt2661_free_rx_ring(struct rt2661_softc *, 102 struct rt2661_rx_ring *); 103 static int rt2661_newstate(struct ieee80211vap *, 104 enum ieee80211_state, int); 105 static uint16_t rt2661_eeprom_read(struct rt2661_softc *, uint8_t); 106 static void rt2661_rx_intr(struct rt2661_softc *); 107 static void rt2661_tx_intr(struct rt2661_softc *); 108 static void rt2661_tx_dma_intr(struct rt2661_softc *, 109 struct rt2661_tx_ring *); 110 static void rt2661_mcu_beacon_expire(struct rt2661_softc *); 111 static void rt2661_mcu_wakeup(struct rt2661_softc *); 112 static void rt2661_mcu_cmd_intr(struct rt2661_softc *); 113 static void rt2661_scan_start(struct ieee80211com *); 114 static void rt2661_scan_end(struct ieee80211com *); 115 static void rt2661_getradiocaps(struct ieee80211com *, int, int *, 116 struct ieee80211_channel[]); 117 static void rt2661_set_channel(struct ieee80211com *); 118 static void rt2661_setup_tx_desc(struct rt2661_softc *, 119 struct rt2661_tx_desc *, uint32_t, uint16_t, int, 120 int, const bus_dma_segment_t *, int, int); 121 static int rt2661_tx_data(struct rt2661_softc *, struct mbuf *, 122 struct ieee80211_node *, int); 123 static int rt2661_tx_mgt(struct rt2661_softc *, struct mbuf *, 124 struct ieee80211_node *); 125 static int rt2661_transmit(struct ieee80211com *, struct mbuf *); 126 static void rt2661_start(struct rt2661_softc *); 127 static int rt2661_raw_xmit(struct ieee80211_node *, struct mbuf *, 128 const struct ieee80211_bpf_params *); 129 static void rt2661_watchdog(void *); 130 static void rt2661_parent(struct ieee80211com *); 131 static void rt2661_bbp_write(struct rt2661_softc *, uint8_t, 132 uint8_t); 133 static uint8_t rt2661_bbp_read(struct rt2661_softc *, uint8_t); 134 static void rt2661_rf_write(struct rt2661_softc *, uint8_t, 135 uint32_t); 136 static int rt2661_tx_cmd(struct rt2661_softc *, uint8_t, 137 uint16_t); 138 static void rt2661_select_antenna(struct rt2661_softc *); 139 static void rt2661_enable_mrr(struct rt2661_softc *); 140 static void rt2661_set_txpreamble(struct rt2661_softc *); 141 static void rt2661_set_basicrates(struct rt2661_softc *, 142 const struct ieee80211_rateset *); 143 static void rt2661_select_band(struct rt2661_softc *, 144 struct ieee80211_channel *); 145 static void rt2661_set_chan(struct rt2661_softc *, 146 struct ieee80211_channel *); 147 static void rt2661_set_bssid(struct rt2661_softc *, 148 const uint8_t *); 149 static void rt2661_set_macaddr(struct rt2661_softc *, 150 const uint8_t *); 151 static void rt2661_update_promisc(struct ieee80211com *); 152 static int rt2661_wme_update(struct ieee80211com *) __unused; 153 static void rt2661_update_slot(struct ieee80211com *); 154 static const char *rt2661_get_rf(int); 155 static void rt2661_read_eeprom(struct rt2661_softc *, 156 uint8_t macaddr[IEEE80211_ADDR_LEN]); 157 static int rt2661_bbp_init(struct rt2661_softc *); 158 static void rt2661_init_locked(struct rt2661_softc *); 159 static void rt2661_init(void *); 160 static void rt2661_stop_locked(struct rt2661_softc *); 161 static void rt2661_stop(void *); 162 static int rt2661_load_microcode(struct rt2661_softc *); 163 #ifdef notyet 164 static void rt2661_rx_tune(struct rt2661_softc *); 165 static void rt2661_radar_start(struct rt2661_softc *); 166 static int rt2661_radar_stop(struct rt2661_softc *); 167 #endif 168 static int rt2661_prepare_beacon(struct rt2661_softc *, 169 struct ieee80211vap *); 170 static void rt2661_enable_tsf_sync(struct rt2661_softc *); 171 static void rt2661_enable_tsf(struct rt2661_softc *); 172 static int rt2661_get_rssi(struct rt2661_softc *, uint8_t); 173 174 static const struct { 175 uint32_t reg; 176 uint32_t val; 177 } rt2661_def_mac[] = { 178 RT2661_DEF_MAC 179 }; 180 181 static const struct { 182 uint8_t reg; 183 uint8_t val; 184 } rt2661_def_bbp[] = { 185 RT2661_DEF_BBP 186 }; 187 188 static const struct rfprog { 189 uint8_t chan; 190 uint32_t r1, r2, r3, r4; 191 } rt2661_rf5225_1[] = { 192 RT2661_RF5225_1 193 }, rt2661_rf5225_2[] = { 194 RT2661_RF5225_2 195 }; 196 197 static const uint8_t rt2661_chan_5ghz[] = 198 { 36, 40, 44, 48, 52, 56, 60, 64, 199 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 200 149, 153, 157, 161, 165 }; 201 202 int 203 rt2661_attach(device_t dev, int id) 204 { 205 struct rt2661_softc *sc = device_get_softc(dev); 206 struct ieee80211com *ic = &sc->sc_ic; 207 uint32_t val; 208 int error, ac, ntries; 209 210 sc->sc_id = id; 211 sc->sc_dev = dev; 212 213 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 214 MTX_DEF | MTX_RECURSE); 215 216 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 217 mbufq_init(&sc->sc_snd, ifqmaxlen); 218 219 /* wait for NIC to initialize */ 220 for (ntries = 0; ntries < 1000; ntries++) { 221 if ((val = RAL_READ(sc, RT2661_MAC_CSR0)) != 0) 222 break; 223 DELAY(1000); 224 } 225 if (ntries == 1000) { 226 device_printf(sc->sc_dev, 227 "timeout waiting for NIC to initialize\n"); 228 error = EIO; 229 goto fail1; 230 } 231 232 /* retrieve RF rev. no and various other things from EEPROM */ 233 rt2661_read_eeprom(sc, ic->ic_macaddr); 234 235 device_printf(dev, "MAC/BBP RT%X, RF %s\n", val, 236 rt2661_get_rf(sc->rf_rev)); 237 238 /* 239 * Allocate Tx and Rx rings. 240 */ 241 for (ac = 0; ac < 4; ac++) { 242 error = rt2661_alloc_tx_ring(sc, &sc->txq[ac], 243 RT2661_TX_RING_COUNT); 244 if (error != 0) { 245 device_printf(sc->sc_dev, 246 "could not allocate Tx ring %d\n", ac); 247 goto fail2; 248 } 249 } 250 251 error = rt2661_alloc_tx_ring(sc, &sc->mgtq, RT2661_MGT_RING_COUNT); 252 if (error != 0) { 253 device_printf(sc->sc_dev, "could not allocate Mgt ring\n"); 254 goto fail2; 255 } 256 257 error = rt2661_alloc_rx_ring(sc, &sc->rxq, RT2661_RX_RING_COUNT); 258 if (error != 0) { 259 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 260 goto fail3; 261 } 262 263 ic->ic_softc = sc; 264 ic->ic_name = device_get_nameunit(dev); 265 ic->ic_opmode = IEEE80211_M_STA; 266 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 267 268 /* set device capabilities */ 269 ic->ic_caps = 270 IEEE80211_C_STA /* station mode */ 271 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 272 | IEEE80211_C_HOSTAP /* hostap mode */ 273 | IEEE80211_C_MONITOR /* monitor mode */ 274 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 275 | IEEE80211_C_WDS /* 4-address traffic works */ 276 | IEEE80211_C_MBSS /* mesh point link mode */ 277 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 278 | IEEE80211_C_SHSLOT /* short slot time supported */ 279 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 280 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 281 #ifdef notyet 282 | IEEE80211_C_TXFRAG /* handle tx frags */ 283 | IEEE80211_C_WME /* 802.11e */ 284 #endif 285 ; 286 287 rt2661_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans, 288 ic->ic_channels); 289 290 ieee80211_ifattach(ic); 291 #if 0 292 ic->ic_wme.wme_update = rt2661_wme_update; 293 #endif 294 ic->ic_scan_start = rt2661_scan_start; 295 ic->ic_scan_end = rt2661_scan_end; 296 ic->ic_getradiocaps = rt2661_getradiocaps; 297 ic->ic_set_channel = rt2661_set_channel; 298 ic->ic_updateslot = rt2661_update_slot; 299 ic->ic_update_promisc = rt2661_update_promisc; 300 ic->ic_raw_xmit = rt2661_raw_xmit; 301 ic->ic_transmit = rt2661_transmit; 302 ic->ic_parent = rt2661_parent; 303 ic->ic_vap_create = rt2661_vap_create; 304 ic->ic_vap_delete = rt2661_vap_delete; 305 306 ieee80211_radiotap_attach(ic, 307 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 308 RT2661_TX_RADIOTAP_PRESENT, 309 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 310 RT2661_RX_RADIOTAP_PRESENT); 311 312 #ifdef RAL_DEBUG 313 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 314 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 315 "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs"); 316 #endif 317 if (bootverbose) 318 ieee80211_announce(ic); 319 320 return 0; 321 322 fail3: rt2661_free_tx_ring(sc, &sc->mgtq); 323 fail2: while (--ac >= 0) 324 rt2661_free_tx_ring(sc, &sc->txq[ac]); 325 fail1: mtx_destroy(&sc->sc_mtx); 326 return error; 327 } 328 329 int 330 rt2661_detach(void *xsc) 331 { 332 struct rt2661_softc *sc = xsc; 333 struct ieee80211com *ic = &sc->sc_ic; 334 335 RAL_LOCK(sc); 336 rt2661_stop_locked(sc); 337 RAL_UNLOCK(sc); 338 339 ieee80211_ifdetach(ic); 340 mbufq_drain(&sc->sc_snd); 341 342 rt2661_free_tx_ring(sc, &sc->txq[0]); 343 rt2661_free_tx_ring(sc, &sc->txq[1]); 344 rt2661_free_tx_ring(sc, &sc->txq[2]); 345 rt2661_free_tx_ring(sc, &sc->txq[3]); 346 rt2661_free_tx_ring(sc, &sc->mgtq); 347 rt2661_free_rx_ring(sc, &sc->rxq); 348 349 mtx_destroy(&sc->sc_mtx); 350 351 return 0; 352 } 353 354 static struct ieee80211vap * 355 rt2661_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 356 enum ieee80211_opmode opmode, int flags, 357 const uint8_t bssid[IEEE80211_ADDR_LEN], 358 const uint8_t mac[IEEE80211_ADDR_LEN]) 359 { 360 struct rt2661_softc *sc = ic->ic_softc; 361 struct rt2661_vap *rvp; 362 struct ieee80211vap *vap; 363 364 switch (opmode) { 365 case IEEE80211_M_STA: 366 case IEEE80211_M_IBSS: 367 case IEEE80211_M_AHDEMO: 368 case IEEE80211_M_MONITOR: 369 case IEEE80211_M_HOSTAP: 370 case IEEE80211_M_MBSS: 371 /* XXXRP: TBD */ 372 if (!TAILQ_EMPTY(&ic->ic_vaps)) { 373 device_printf(sc->sc_dev, "only 1 vap supported\n"); 374 return NULL; 375 } 376 if (opmode == IEEE80211_M_STA) 377 flags |= IEEE80211_CLONE_NOBEACONS; 378 break; 379 case IEEE80211_M_WDS: 380 if (TAILQ_EMPTY(&ic->ic_vaps) || 381 ic->ic_opmode != IEEE80211_M_HOSTAP) { 382 device_printf(sc->sc_dev, 383 "wds only supported in ap mode\n"); 384 return NULL; 385 } 386 /* 387 * Silently remove any request for a unique 388 * bssid; WDS vap's always share the local 389 * mac address. 390 */ 391 flags &= ~IEEE80211_CLONE_BSSID; 392 break; 393 default: 394 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode); 395 return NULL; 396 } 397 rvp = malloc(sizeof(struct rt2661_vap), M_80211_VAP, M_WAITOK | M_ZERO); 398 vap = &rvp->ral_vap; 399 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid); 400 401 /* override state transition machine */ 402 rvp->ral_newstate = vap->iv_newstate; 403 vap->iv_newstate = rt2661_newstate; 404 #if 0 405 vap->iv_update_beacon = rt2661_beacon_update; 406 #endif 407 408 ieee80211_ratectl_init(vap); 409 /* complete setup */ 410 ieee80211_vap_attach(vap, ieee80211_media_change, 411 ieee80211_media_status, mac); 412 if (TAILQ_FIRST(&ic->ic_vaps) == vap) 413 ic->ic_opmode = opmode; 414 return vap; 415 } 416 417 static void 418 rt2661_vap_delete(struct ieee80211vap *vap) 419 { 420 struct rt2661_vap *rvp = RT2661_VAP(vap); 421 422 ieee80211_ratectl_deinit(vap); 423 ieee80211_vap_detach(vap); 424 free(rvp, M_80211_VAP); 425 } 426 427 void 428 rt2661_shutdown(void *xsc) 429 { 430 struct rt2661_softc *sc = xsc; 431 432 rt2661_stop(sc); 433 } 434 435 void 436 rt2661_suspend(void *xsc) 437 { 438 struct rt2661_softc *sc = xsc; 439 440 rt2661_stop(sc); 441 } 442 443 void 444 rt2661_resume(void *xsc) 445 { 446 struct rt2661_softc *sc = xsc; 447 448 if (sc->sc_ic.ic_nrunning > 0) 449 rt2661_init(sc); 450 } 451 452 static void 453 rt2661_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 454 { 455 if (error != 0) 456 return; 457 458 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 459 460 *(bus_addr_t *)arg = segs[0].ds_addr; 461 } 462 463 static int 464 rt2661_alloc_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring, 465 int count) 466 { 467 int i, error; 468 469 ring->count = count; 470 ring->queued = 0; 471 ring->cur = ring->next = ring->stat = 0; 472 473 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 474 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 475 count * RT2661_TX_DESC_SIZE, 1, count * RT2661_TX_DESC_SIZE, 476 0, NULL, NULL, &ring->desc_dmat); 477 if (error != 0) { 478 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 479 goto fail; 480 } 481 482 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 483 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 484 if (error != 0) { 485 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 486 goto fail; 487 } 488 489 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 490 count * RT2661_TX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 491 0); 492 if (error != 0) { 493 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 494 goto fail; 495 } 496 497 ring->data = malloc(count * sizeof (struct rt2661_tx_data), M_DEVBUF, 498 M_NOWAIT | M_ZERO); 499 if (ring->data == NULL) { 500 device_printf(sc->sc_dev, "could not allocate soft data\n"); 501 error = ENOMEM; 502 goto fail; 503 } 504 505 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 506 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 507 RT2661_MAX_SCATTER, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 508 if (error != 0) { 509 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 510 goto fail; 511 } 512 513 for (i = 0; i < count; i++) { 514 error = bus_dmamap_create(ring->data_dmat, 0, 515 &ring->data[i].map); 516 if (error != 0) { 517 device_printf(sc->sc_dev, "could not create DMA map\n"); 518 goto fail; 519 } 520 } 521 522 return 0; 523 524 fail: rt2661_free_tx_ring(sc, ring); 525 return error; 526 } 527 528 static void 529 rt2661_reset_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 530 { 531 struct rt2661_tx_desc *desc; 532 struct rt2661_tx_data *data; 533 int i; 534 535 for (i = 0; i < ring->count; i++) { 536 desc = &ring->desc[i]; 537 data = &ring->data[i]; 538 539 if (data->m != NULL) { 540 bus_dmamap_sync(ring->data_dmat, data->map, 541 BUS_DMASYNC_POSTWRITE); 542 bus_dmamap_unload(ring->data_dmat, data->map); 543 m_freem(data->m); 544 data->m = NULL; 545 } 546 547 if (data->ni != NULL) { 548 ieee80211_free_node(data->ni); 549 data->ni = NULL; 550 } 551 552 desc->flags = 0; 553 } 554 555 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 556 557 ring->queued = 0; 558 ring->cur = ring->next = ring->stat = 0; 559 } 560 561 static void 562 rt2661_free_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 563 { 564 struct rt2661_tx_data *data; 565 int i; 566 567 if (ring->desc != NULL) { 568 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 569 BUS_DMASYNC_POSTWRITE); 570 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 571 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 572 } 573 574 if (ring->desc_dmat != NULL) 575 bus_dma_tag_destroy(ring->desc_dmat); 576 577 if (ring->data != NULL) { 578 for (i = 0; i < ring->count; i++) { 579 data = &ring->data[i]; 580 581 if (data->m != NULL) { 582 bus_dmamap_sync(ring->data_dmat, data->map, 583 BUS_DMASYNC_POSTWRITE); 584 bus_dmamap_unload(ring->data_dmat, data->map); 585 m_freem(data->m); 586 } 587 588 if (data->ni != NULL) 589 ieee80211_free_node(data->ni); 590 591 if (data->map != NULL) 592 bus_dmamap_destroy(ring->data_dmat, data->map); 593 } 594 595 free(ring->data, M_DEVBUF); 596 } 597 598 if (ring->data_dmat != NULL) 599 bus_dma_tag_destroy(ring->data_dmat); 600 } 601 602 static int 603 rt2661_alloc_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring, 604 int count) 605 { 606 struct rt2661_rx_desc *desc; 607 struct rt2661_rx_data *data; 608 bus_addr_t physaddr; 609 int i, error; 610 611 ring->count = count; 612 ring->cur = ring->next = 0; 613 614 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 615 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 616 count * RT2661_RX_DESC_SIZE, 1, count * RT2661_RX_DESC_SIZE, 617 0, NULL, NULL, &ring->desc_dmat); 618 if (error != 0) { 619 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 620 goto fail; 621 } 622 623 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 624 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 625 if (error != 0) { 626 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 627 goto fail; 628 } 629 630 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 631 count * RT2661_RX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 632 0); 633 if (error != 0) { 634 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 635 goto fail; 636 } 637 638 ring->data = malloc(count * sizeof (struct rt2661_rx_data), M_DEVBUF, 639 M_NOWAIT | M_ZERO); 640 if (ring->data == NULL) { 641 device_printf(sc->sc_dev, "could not allocate soft data\n"); 642 error = ENOMEM; 643 goto fail; 644 } 645 646 /* 647 * Pre-allocate Rx buffers and populate Rx ring. 648 */ 649 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 650 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 651 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 652 if (error != 0) { 653 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 654 goto fail; 655 } 656 657 for (i = 0; i < count; i++) { 658 desc = &sc->rxq.desc[i]; 659 data = &sc->rxq.data[i]; 660 661 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 662 if (error != 0) { 663 device_printf(sc->sc_dev, "could not create DMA map\n"); 664 goto fail; 665 } 666 667 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 668 if (data->m == NULL) { 669 device_printf(sc->sc_dev, 670 "could not allocate rx mbuf\n"); 671 error = ENOMEM; 672 goto fail; 673 } 674 675 error = bus_dmamap_load(ring->data_dmat, data->map, 676 mtod(data->m, void *), MCLBYTES, rt2661_dma_map_addr, 677 &physaddr, 0); 678 if (error != 0) { 679 device_printf(sc->sc_dev, 680 "could not load rx buf DMA map"); 681 goto fail; 682 } 683 684 desc->flags = htole32(RT2661_RX_BUSY); 685 desc->physaddr = htole32(physaddr); 686 } 687 688 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 689 690 return 0; 691 692 fail: rt2661_free_rx_ring(sc, ring); 693 return error; 694 } 695 696 static void 697 rt2661_reset_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 698 { 699 int i; 700 701 for (i = 0; i < ring->count; i++) 702 ring->desc[i].flags = htole32(RT2661_RX_BUSY); 703 704 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 705 706 ring->cur = ring->next = 0; 707 } 708 709 static void 710 rt2661_free_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 711 { 712 struct rt2661_rx_data *data; 713 int i; 714 715 if (ring->desc != NULL) { 716 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 717 BUS_DMASYNC_POSTWRITE); 718 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 719 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 720 } 721 722 if (ring->desc_dmat != NULL) 723 bus_dma_tag_destroy(ring->desc_dmat); 724 725 if (ring->data != NULL) { 726 for (i = 0; i < ring->count; i++) { 727 data = &ring->data[i]; 728 729 if (data->m != NULL) { 730 bus_dmamap_sync(ring->data_dmat, data->map, 731 BUS_DMASYNC_POSTREAD); 732 bus_dmamap_unload(ring->data_dmat, data->map); 733 m_freem(data->m); 734 } 735 736 if (data->map != NULL) 737 bus_dmamap_destroy(ring->data_dmat, data->map); 738 } 739 740 free(ring->data, M_DEVBUF); 741 } 742 743 if (ring->data_dmat != NULL) 744 bus_dma_tag_destroy(ring->data_dmat); 745 } 746 747 static int 748 rt2661_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 749 { 750 struct rt2661_vap *rvp = RT2661_VAP(vap); 751 struct ieee80211com *ic = vap->iv_ic; 752 struct rt2661_softc *sc = ic->ic_softc; 753 int error; 754 755 if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) { 756 uint32_t tmp; 757 758 /* abort TSF synchronization */ 759 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 760 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0x00ffffff); 761 } 762 763 error = rvp->ral_newstate(vap, nstate, arg); 764 765 if (error == 0 && nstate == IEEE80211_S_RUN) { 766 struct ieee80211_node *ni = vap->iv_bss; 767 768 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 769 rt2661_enable_mrr(sc); 770 rt2661_set_txpreamble(sc); 771 rt2661_set_basicrates(sc, &ni->ni_rates); 772 rt2661_set_bssid(sc, ni->ni_bssid); 773 } 774 775 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 776 vap->iv_opmode == IEEE80211_M_IBSS || 777 vap->iv_opmode == IEEE80211_M_MBSS) { 778 error = rt2661_prepare_beacon(sc, vap); 779 if (error != 0) 780 return error; 781 } 782 if (vap->iv_opmode != IEEE80211_M_MONITOR) 783 rt2661_enable_tsf_sync(sc); 784 else 785 rt2661_enable_tsf(sc); 786 } 787 return error; 788 } 789 790 /* 791 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 792 * 93C66). 793 */ 794 static uint16_t 795 rt2661_eeprom_read(struct rt2661_softc *sc, uint8_t addr) 796 { 797 uint32_t tmp; 798 uint16_t val; 799 int n; 800 801 /* clock C once before the first command */ 802 RT2661_EEPROM_CTL(sc, 0); 803 804 RT2661_EEPROM_CTL(sc, RT2661_S); 805 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 806 RT2661_EEPROM_CTL(sc, RT2661_S); 807 808 /* write start bit (1) */ 809 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 810 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 811 812 /* write READ opcode (10) */ 813 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 814 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 815 RT2661_EEPROM_CTL(sc, RT2661_S); 816 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 817 818 /* write address (A5-A0 or A7-A0) */ 819 n = (RAL_READ(sc, RT2661_E2PROM_CSR) & RT2661_93C46) ? 5 : 7; 820 for (; n >= 0; n--) { 821 RT2661_EEPROM_CTL(sc, RT2661_S | 822 (((addr >> n) & 1) << RT2661_SHIFT_D)); 823 RT2661_EEPROM_CTL(sc, RT2661_S | 824 (((addr >> n) & 1) << RT2661_SHIFT_D) | RT2661_C); 825 } 826 827 RT2661_EEPROM_CTL(sc, RT2661_S); 828 829 /* read data Q15-Q0 */ 830 val = 0; 831 for (n = 15; n >= 0; n--) { 832 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 833 tmp = RAL_READ(sc, RT2661_E2PROM_CSR); 834 val |= ((tmp & RT2661_Q) >> RT2661_SHIFT_Q) << n; 835 RT2661_EEPROM_CTL(sc, RT2661_S); 836 } 837 838 RT2661_EEPROM_CTL(sc, 0); 839 840 /* clear Chip Select and clock C */ 841 RT2661_EEPROM_CTL(sc, RT2661_S); 842 RT2661_EEPROM_CTL(sc, 0); 843 RT2661_EEPROM_CTL(sc, RT2661_C); 844 845 return val; 846 } 847 848 static void 849 rt2661_tx_intr(struct rt2661_softc *sc) 850 { 851 struct ieee80211_ratectl_tx_status *txs = &sc->sc_txs; 852 struct rt2661_tx_ring *txq; 853 struct rt2661_tx_data *data; 854 uint32_t val; 855 int error, qid; 856 857 txs->flags = IEEE80211_RATECTL_TX_FAIL_LONG; 858 for (;;) { 859 struct ieee80211_node *ni; 860 struct mbuf *m; 861 862 val = RAL_READ(sc, RT2661_STA_CSR4); 863 if (!(val & RT2661_TX_STAT_VALID)) 864 break; 865 866 /* retrieve the queue in which this frame was sent */ 867 qid = RT2661_TX_QID(val); 868 txq = (qid <= 3) ? &sc->txq[qid] : &sc->mgtq; 869 870 /* retrieve rate control algorithm context */ 871 data = &txq->data[txq->stat]; 872 m = data->m; 873 data->m = NULL; 874 ni = data->ni; 875 data->ni = NULL; 876 877 /* if no frame has been sent, ignore */ 878 if (ni == NULL) 879 continue; 880 881 switch (RT2661_TX_RESULT(val)) { 882 case RT2661_TX_SUCCESS: 883 txs->status = IEEE80211_RATECTL_TX_SUCCESS; 884 txs->long_retries = RT2661_TX_RETRYCNT(val); 885 886 DPRINTFN(sc, 10, "data frame sent successfully after " 887 "%d retries\n", txs->long_retries); 888 if (data->rix != IEEE80211_FIXED_RATE_NONE) 889 ieee80211_ratectl_tx_complete(ni, txs); 890 error = 0; 891 break; 892 893 case RT2661_TX_RETRY_FAIL: 894 txs->status = IEEE80211_RATECTL_TX_FAIL_LONG; 895 txs->long_retries = RT2661_TX_RETRYCNT(val); 896 897 DPRINTFN(sc, 9, "%s\n", 898 "sending data frame failed (too much retries)"); 899 if (data->rix != IEEE80211_FIXED_RATE_NONE) 900 ieee80211_ratectl_tx_complete(ni, txs); 901 error = 1; 902 break; 903 904 default: 905 /* other failure */ 906 device_printf(sc->sc_dev, 907 "sending data frame failed 0x%08x\n", val); 908 error = 1; 909 } 910 911 DPRINTFN(sc, 15, "tx done q=%d idx=%u\n", qid, txq->stat); 912 913 txq->queued--; 914 if (++txq->stat >= txq->count) /* faster than % count */ 915 txq->stat = 0; 916 917 ieee80211_tx_complete(ni, m, error); 918 } 919 920 sc->sc_tx_timer = 0; 921 922 rt2661_start(sc); 923 } 924 925 static void 926 rt2661_tx_dma_intr(struct rt2661_softc *sc, struct rt2661_tx_ring *txq) 927 { 928 struct rt2661_tx_desc *desc; 929 struct rt2661_tx_data *data; 930 931 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_POSTREAD); 932 933 for (;;) { 934 desc = &txq->desc[txq->next]; 935 data = &txq->data[txq->next]; 936 937 if ((le32toh(desc->flags) & RT2661_TX_BUSY) || 938 !(le32toh(desc->flags) & RT2661_TX_VALID)) 939 break; 940 941 bus_dmamap_sync(txq->data_dmat, data->map, 942 BUS_DMASYNC_POSTWRITE); 943 bus_dmamap_unload(txq->data_dmat, data->map); 944 945 /* descriptor is no longer valid */ 946 desc->flags &= ~htole32(RT2661_TX_VALID); 947 948 DPRINTFN(sc, 15, "tx dma done q=%p idx=%u\n", txq, txq->next); 949 950 if (++txq->next >= txq->count) /* faster than % count */ 951 txq->next = 0; 952 } 953 954 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 955 } 956 957 static void 958 rt2661_rx_intr(struct rt2661_softc *sc) 959 { 960 struct epoch_tracker et; 961 struct ieee80211com *ic = &sc->sc_ic; 962 struct rt2661_rx_desc *desc; 963 struct rt2661_rx_data *data; 964 bus_addr_t physaddr; 965 struct ieee80211_frame *wh; 966 struct ieee80211_node *ni; 967 struct mbuf *mnew, *m; 968 int error; 969 970 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 971 BUS_DMASYNC_POSTREAD); 972 973 for (;;) { 974 int8_t rssi, nf; 975 976 desc = &sc->rxq.desc[sc->rxq.cur]; 977 data = &sc->rxq.data[sc->rxq.cur]; 978 979 if (le32toh(desc->flags) & RT2661_RX_BUSY) 980 break; 981 982 if ((le32toh(desc->flags) & RT2661_RX_PHY_ERROR) || 983 (le32toh(desc->flags) & RT2661_RX_CRC_ERROR)) { 984 /* 985 * This should not happen since we did not request 986 * to receive those frames when we filled TXRX_CSR0. 987 */ 988 DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n", 989 le32toh(desc->flags)); 990 counter_u64_add(ic->ic_ierrors, 1); 991 goto skip; 992 } 993 994 if ((le32toh(desc->flags) & RT2661_RX_CIPHER_MASK) != 0) { 995 counter_u64_add(ic->ic_ierrors, 1); 996 goto skip; 997 } 998 999 /* 1000 * Try to allocate a new mbuf for this ring element and load it 1001 * before processing the current mbuf. If the ring element 1002 * cannot be loaded, drop the received packet and reuse the old 1003 * mbuf. In the unlikely case that the old mbuf can't be 1004 * reloaded either, explicitly panic. 1005 */ 1006 mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1007 if (mnew == NULL) { 1008 counter_u64_add(ic->ic_ierrors, 1); 1009 goto skip; 1010 } 1011 1012 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1013 BUS_DMASYNC_POSTREAD); 1014 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1015 1016 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1017 mtod(mnew, void *), MCLBYTES, rt2661_dma_map_addr, 1018 &physaddr, 0); 1019 if (error != 0) { 1020 m_freem(mnew); 1021 1022 /* try to reload the old mbuf */ 1023 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1024 mtod(data->m, void *), MCLBYTES, 1025 rt2661_dma_map_addr, &physaddr, 0); 1026 if (error != 0) { 1027 /* very unlikely that it will fail... */ 1028 panic("%s: could not load old rx mbuf", 1029 device_get_name(sc->sc_dev)); 1030 } 1031 counter_u64_add(ic->ic_ierrors, 1); 1032 goto skip; 1033 } 1034 1035 /* 1036 * New mbuf successfully loaded, update Rx ring and continue 1037 * processing. 1038 */ 1039 m = data->m; 1040 data->m = mnew; 1041 desc->physaddr = htole32(physaddr); 1042 1043 /* finalize mbuf */ 1044 m->m_pkthdr.len = m->m_len = 1045 (le32toh(desc->flags) >> 16) & 0xfff; 1046 1047 rssi = rt2661_get_rssi(sc, desc->rssi); 1048 /* Error happened during RSSI conversion. */ 1049 if (rssi < 0) 1050 rssi = -30; /* XXX ignored by net80211 */ 1051 nf = RT2661_NOISE_FLOOR; 1052 1053 if (ieee80211_radiotap_active(ic)) { 1054 struct rt2661_rx_radiotap_header *tap = &sc->sc_rxtap; 1055 uint32_t tsf_lo, tsf_hi; 1056 1057 /* get timestamp (low and high 32 bits) */ 1058 tsf_hi = RAL_READ(sc, RT2661_TXRX_CSR13); 1059 tsf_lo = RAL_READ(sc, RT2661_TXRX_CSR12); 1060 1061 tap->wr_tsf = 1062 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1063 tap->wr_flags = 0; 1064 tap->wr_rate = ieee80211_plcp2rate(desc->rate, 1065 (desc->flags & htole32(RT2661_RX_OFDM)) ? 1066 IEEE80211_T_OFDM : IEEE80211_T_CCK); 1067 tap->wr_antsignal = nf + rssi; 1068 tap->wr_antnoise = nf; 1069 } 1070 sc->sc_flags |= RAL_INPUT_RUNNING; 1071 RAL_UNLOCK(sc); 1072 wh = mtod(m, struct ieee80211_frame *); 1073 1074 /* send the frame to the 802.11 layer */ 1075 ni = ieee80211_find_rxnode(ic, 1076 (struct ieee80211_frame_min *)wh); 1077 NET_EPOCH_ENTER(et); 1078 if (ni != NULL) { 1079 (void) ieee80211_input(ni, m, rssi, nf); 1080 ieee80211_free_node(ni); 1081 } else 1082 (void) ieee80211_input_all(ic, m, rssi, nf); 1083 NET_EPOCH_EXIT(et); 1084 1085 RAL_LOCK(sc); 1086 sc->sc_flags &= ~RAL_INPUT_RUNNING; 1087 1088 skip: desc->flags |= htole32(RT2661_RX_BUSY); 1089 1090 DPRINTFN(sc, 15, "rx intr idx=%u\n", sc->rxq.cur); 1091 1092 sc->rxq.cur = (sc->rxq.cur + 1) % RT2661_RX_RING_COUNT; 1093 } 1094 1095 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1096 BUS_DMASYNC_PREWRITE); 1097 } 1098 1099 /* ARGSUSED */ 1100 static void 1101 rt2661_mcu_beacon_expire(struct rt2661_softc *sc) 1102 { 1103 /* do nothing */ 1104 } 1105 1106 static void 1107 rt2661_mcu_wakeup(struct rt2661_softc *sc) 1108 { 1109 RAL_WRITE(sc, RT2661_MAC_CSR11, 5 << 16); 1110 1111 RAL_WRITE(sc, RT2661_SOFT_RESET_CSR, 0x7); 1112 RAL_WRITE(sc, RT2661_IO_CNTL_CSR, 0x18); 1113 RAL_WRITE(sc, RT2661_PCI_USEC_CSR, 0x20); 1114 1115 /* send wakeup command to MCU */ 1116 rt2661_tx_cmd(sc, RT2661_MCU_CMD_WAKEUP, 0); 1117 } 1118 1119 static void 1120 rt2661_mcu_cmd_intr(struct rt2661_softc *sc) 1121 { 1122 RAL_READ(sc, RT2661_M2H_CMD_DONE_CSR); 1123 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 1124 } 1125 1126 void 1127 rt2661_intr(void *arg) 1128 { 1129 struct rt2661_softc *sc = arg; 1130 uint32_t r1, r2; 1131 1132 RAL_LOCK(sc); 1133 1134 /* disable MAC and MCU interrupts */ 1135 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffff7f); 1136 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 1137 1138 /* don't re-enable interrupts if we're shutting down */ 1139 if (!(sc->sc_flags & RAL_RUNNING)) { 1140 RAL_UNLOCK(sc); 1141 return; 1142 } 1143 1144 r1 = RAL_READ(sc, RT2661_INT_SOURCE_CSR); 1145 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, r1); 1146 1147 r2 = RAL_READ(sc, RT2661_MCU_INT_SOURCE_CSR); 1148 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, r2); 1149 1150 if (r1 & RT2661_MGT_DONE) 1151 rt2661_tx_dma_intr(sc, &sc->mgtq); 1152 1153 if (r1 & RT2661_RX_DONE) 1154 rt2661_rx_intr(sc); 1155 1156 if (r1 & RT2661_TX0_DMA_DONE) 1157 rt2661_tx_dma_intr(sc, &sc->txq[0]); 1158 1159 if (r1 & RT2661_TX1_DMA_DONE) 1160 rt2661_tx_dma_intr(sc, &sc->txq[1]); 1161 1162 if (r1 & RT2661_TX2_DMA_DONE) 1163 rt2661_tx_dma_intr(sc, &sc->txq[2]); 1164 1165 if (r1 & RT2661_TX3_DMA_DONE) 1166 rt2661_tx_dma_intr(sc, &sc->txq[3]); 1167 1168 if (r1 & RT2661_TX_DONE) 1169 rt2661_tx_intr(sc); 1170 1171 if (r2 & RT2661_MCU_CMD_DONE) 1172 rt2661_mcu_cmd_intr(sc); 1173 1174 if (r2 & RT2661_MCU_BEACON_EXPIRE) 1175 rt2661_mcu_beacon_expire(sc); 1176 1177 if (r2 & RT2661_MCU_WAKEUP) 1178 rt2661_mcu_wakeup(sc); 1179 1180 /* re-enable MAC and MCU interrupts */ 1181 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 1182 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 1183 1184 RAL_UNLOCK(sc); 1185 } 1186 1187 static uint8_t 1188 rt2661_plcp_signal(int rate) 1189 { 1190 switch (rate) { 1191 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1192 case 12: return 0xb; 1193 case 18: return 0xf; 1194 case 24: return 0xa; 1195 case 36: return 0xe; 1196 case 48: return 0x9; 1197 case 72: return 0xd; 1198 case 96: return 0x8; 1199 case 108: return 0xc; 1200 1201 /* CCK rates (NB: not IEEE std, device-specific) */ 1202 case 2: return 0x0; 1203 case 4: return 0x1; 1204 case 11: return 0x2; 1205 case 22: return 0x3; 1206 } 1207 return 0xff; /* XXX unsupported/unknown rate */ 1208 } 1209 1210 static void 1211 rt2661_setup_tx_desc(struct rt2661_softc *sc, struct rt2661_tx_desc *desc, 1212 uint32_t flags, uint16_t xflags, int len, int rate, 1213 const bus_dma_segment_t *segs, int nsegs, int ac) 1214 { 1215 struct ieee80211com *ic = &sc->sc_ic; 1216 uint16_t plcp_length; 1217 int i, remainder; 1218 1219 desc->flags = htole32(flags); 1220 desc->flags |= htole32(len << 16); 1221 desc->flags |= htole32(RT2661_TX_BUSY | RT2661_TX_VALID); 1222 1223 desc->xflags = htole16(xflags); 1224 desc->xflags |= htole16(nsegs << 13); 1225 1226 desc->wme = htole16( 1227 RT2661_QID(ac) | 1228 RT2661_AIFSN(2) | 1229 RT2661_LOGCWMIN(4) | 1230 RT2661_LOGCWMAX(10)); 1231 1232 /* 1233 * Remember in which queue this frame was sent. This field is driver 1234 * private data only. It will be made available by the NIC in STA_CSR4 1235 * on Tx interrupts. 1236 */ 1237 desc->qid = ac; 1238 1239 /* setup PLCP fields */ 1240 desc->plcp_signal = rt2661_plcp_signal(rate); 1241 desc->plcp_service = 4; 1242 1243 len += IEEE80211_CRC_LEN; 1244 if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) { 1245 desc->flags |= htole32(RT2661_TX_OFDM); 1246 1247 plcp_length = len & 0xfff; 1248 desc->plcp_length_hi = plcp_length >> 6; 1249 desc->plcp_length_lo = plcp_length & 0x3f; 1250 } else { 1251 plcp_length = howmany(16 * len, rate); 1252 if (rate == 22) { 1253 remainder = (16 * len) % 22; 1254 if (remainder != 0 && remainder < 7) 1255 desc->plcp_service |= RT2661_PLCP_LENGEXT; 1256 } 1257 desc->plcp_length_hi = plcp_length >> 8; 1258 desc->plcp_length_lo = plcp_length & 0xff; 1259 1260 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1261 desc->plcp_signal |= 0x08; 1262 } 1263 1264 /* RT2x61 supports scatter with up to 5 segments */ 1265 for (i = 0; i < nsegs; i++) { 1266 desc->addr[i] = htole32(segs[i].ds_addr); 1267 desc->len [i] = htole16(segs[i].ds_len); 1268 } 1269 } 1270 1271 static int 1272 rt2661_tx_mgt(struct rt2661_softc *sc, struct mbuf *m0, 1273 struct ieee80211_node *ni) 1274 { 1275 struct ieee80211vap *vap = ni->ni_vap; 1276 struct ieee80211com *ic = ni->ni_ic; 1277 struct rt2661_tx_desc *desc; 1278 struct rt2661_tx_data *data; 1279 struct ieee80211_frame *wh; 1280 struct ieee80211_key *k; 1281 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1282 uint16_t dur; 1283 uint32_t flags = 0; /* XXX HWSEQ */ 1284 int nsegs, rate, error; 1285 1286 desc = &sc->mgtq.desc[sc->mgtq.cur]; 1287 data = &sc->mgtq.data[sc->mgtq.cur]; 1288 1289 rate = ni->ni_txparms->mgmtrate; 1290 1291 wh = mtod(m0, struct ieee80211_frame *); 1292 1293 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1294 k = ieee80211_crypto_encap(ni, m0); 1295 if (k == NULL) { 1296 m_freem(m0); 1297 return ENOBUFS; 1298 } 1299 } 1300 1301 error = bus_dmamap_load_mbuf_sg(sc->mgtq.data_dmat, data->map, m0, 1302 segs, &nsegs, 0); 1303 if (error != 0) { 1304 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1305 error); 1306 m_freem(m0); 1307 return error; 1308 } 1309 1310 if (ieee80211_radiotap_active_vap(vap)) { 1311 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1312 1313 tap->wt_flags = 0; 1314 tap->wt_rate = rate; 1315 1316 ieee80211_radiotap_tx(vap, m0); 1317 } 1318 1319 data->m = m0; 1320 data->ni = ni; 1321 /* management frames are not taken into account for amrr */ 1322 data->rix = IEEE80211_FIXED_RATE_NONE; 1323 1324 wh = mtod(m0, struct ieee80211_frame *); 1325 1326 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1327 flags |= RT2661_TX_NEED_ACK; 1328 1329 dur = ieee80211_ack_duration(ic->ic_rt, 1330 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1331 *(uint16_t *)wh->i_dur = htole16(dur); 1332 1333 /* tell hardware to add timestamp in probe responses */ 1334 if ((wh->i_fc[0] & 1335 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1336 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1337 flags |= RT2661_TX_TIMESTAMP; 1338 } 1339 1340 rt2661_setup_tx_desc(sc, desc, flags, 0 /* XXX HWSEQ */, 1341 m0->m_pkthdr.len, rate, segs, nsegs, RT2661_QID_MGT); 1342 1343 bus_dmamap_sync(sc->mgtq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1344 bus_dmamap_sync(sc->mgtq.desc_dmat, sc->mgtq.desc_map, 1345 BUS_DMASYNC_PREWRITE); 1346 1347 DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n", 1348 m0->m_pkthdr.len, sc->mgtq.cur, rate); 1349 1350 /* kick mgt */ 1351 sc->mgtq.queued++; 1352 sc->mgtq.cur = (sc->mgtq.cur + 1) % RT2661_MGT_RING_COUNT; 1353 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, RT2661_KICK_MGT); 1354 1355 return 0; 1356 } 1357 1358 static int 1359 rt2661_sendprot(struct rt2661_softc *sc, int ac, 1360 const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate) 1361 { 1362 struct ieee80211com *ic = ni->ni_ic; 1363 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1364 struct rt2661_tx_desc *desc; 1365 struct rt2661_tx_data *data; 1366 struct mbuf *mprot; 1367 int protrate, flags, error; 1368 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1369 int nsegs; 1370 1371 mprot = ieee80211_alloc_prot(ni, m, rate, prot); 1372 if (mprot == NULL) { 1373 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1); 1374 device_printf(sc->sc_dev, 1375 "could not allocate mbuf for protection mode %d\n", prot); 1376 return ENOBUFS; 1377 } 1378 1379 data = &txq->data[txq->cur]; 1380 desc = &txq->desc[txq->cur]; 1381 1382 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, mprot, segs, 1383 &nsegs, 0); 1384 if (error != 0) { 1385 device_printf(sc->sc_dev, 1386 "could not map mbuf (error %d)\n", error); 1387 m_freem(mprot); 1388 return error; 1389 } 1390 1391 data->m = mprot; 1392 data->ni = ieee80211_ref_node(ni); 1393 /* ctl frames are not taken into account for amrr */ 1394 data->rix = IEEE80211_FIXED_RATE_NONE; 1395 1396 protrate = ieee80211_ctl_rate(ic->ic_rt, rate); 1397 flags = RT2661_TX_MORE_FRAG; 1398 if (prot == IEEE80211_PROT_RTSCTS) 1399 flags |= RT2661_TX_NEED_ACK; 1400 1401 rt2661_setup_tx_desc(sc, desc, flags, 0, mprot->m_pkthdr.len, 1402 protrate, segs, 1, ac); 1403 1404 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1405 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1406 1407 txq->queued++; 1408 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1409 1410 return 0; 1411 } 1412 1413 static int 1414 rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0, 1415 struct ieee80211_node *ni, int ac) 1416 { 1417 struct ieee80211vap *vap = ni->ni_vap; 1418 struct ieee80211com *ic = &sc->sc_ic; 1419 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1420 struct rt2661_tx_desc *desc; 1421 struct rt2661_tx_data *data; 1422 struct ieee80211_frame *wh; 1423 const struct ieee80211_txparam *tp = ni->ni_txparms; 1424 struct ieee80211_key *k; 1425 struct mbuf *mnew; 1426 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1427 uint16_t dur; 1428 uint32_t flags; 1429 int error, nsegs, rate, noack = 0; 1430 1431 wh = mtod(m0, struct ieee80211_frame *); 1432 1433 if (m0->m_flags & M_EAPOL) { 1434 rate = tp->mgmtrate; 1435 } else if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1436 rate = tp->mcastrate; 1437 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1438 rate = tp->ucastrate; 1439 } else { 1440 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1441 rate = ni->ni_txrate; 1442 } 1443 rate &= IEEE80211_RATE_VAL; 1444 1445 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS_DATA) 1446 noack = !! ieee80211_wme_vap_ac_is_noack(vap, ac); 1447 1448 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1449 k = ieee80211_crypto_encap(ni, m0); 1450 if (k == NULL) { 1451 m_freem(m0); 1452 return ENOBUFS; 1453 } 1454 1455 /* packet header may have moved, reset our local pointer */ 1456 wh = mtod(m0, struct ieee80211_frame *); 1457 } 1458 1459 flags = 0; 1460 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1461 int prot = IEEE80211_PROT_NONE; 1462 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) 1463 prot = IEEE80211_PROT_RTSCTS; 1464 else if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1465 ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) 1466 prot = ic->ic_protmode; 1467 if (prot != IEEE80211_PROT_NONE) { 1468 error = rt2661_sendprot(sc, ac, m0, ni, prot, rate); 1469 if (error) { 1470 m_freem(m0); 1471 return error; 1472 } 1473 flags |= RT2661_TX_LONG_RETRY | RT2661_TX_IFS; 1474 } 1475 } 1476 1477 data = &txq->data[txq->cur]; 1478 desc = &txq->desc[txq->cur]; 1479 1480 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs, 1481 &nsegs, 0); 1482 if (error != 0 && error != EFBIG) { 1483 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1484 error); 1485 m_freem(m0); 1486 return error; 1487 } 1488 if (error != 0) { 1489 mnew = m_defrag(m0, M_NOWAIT); 1490 if (mnew == NULL) { 1491 device_printf(sc->sc_dev, 1492 "could not defragment mbuf\n"); 1493 m_freem(m0); 1494 return ENOBUFS; 1495 } 1496 m0 = mnew; 1497 1498 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, 1499 segs, &nsegs, 0); 1500 if (error != 0) { 1501 device_printf(sc->sc_dev, 1502 "could not map mbuf (error %d)\n", error); 1503 m_freem(m0); 1504 return error; 1505 } 1506 1507 /* packet header have moved, reset our local pointer */ 1508 wh = mtod(m0, struct ieee80211_frame *); 1509 } 1510 1511 if (ieee80211_radiotap_active_vap(vap)) { 1512 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1513 1514 tap->wt_flags = 0; 1515 tap->wt_rate = rate; 1516 1517 ieee80211_radiotap_tx(vap, m0); 1518 } 1519 1520 data->m = m0; 1521 data->ni = ni; 1522 1523 /* remember link conditions for rate adaptation algorithm */ 1524 if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) { 1525 data->rix = ni->ni_txrate; 1526 /* XXX probably need last rssi value and not avg */ 1527 data->rssi = ic->ic_node_getrssi(ni); 1528 } else 1529 data->rix = IEEE80211_FIXED_RATE_NONE; 1530 1531 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1532 flags |= RT2661_TX_NEED_ACK; 1533 1534 dur = ieee80211_ack_duration(ic->ic_rt, 1535 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1536 *(uint16_t *)wh->i_dur = htole16(dur); 1537 } 1538 1539 rt2661_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate, segs, 1540 nsegs, ac); 1541 1542 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1543 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1544 1545 DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n", 1546 m0->m_pkthdr.len, txq->cur, rate); 1547 1548 /* kick Tx */ 1549 txq->queued++; 1550 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1551 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 1 << ac); 1552 1553 return 0; 1554 } 1555 1556 static int 1557 rt2661_transmit(struct ieee80211com *ic, struct mbuf *m) 1558 { 1559 struct rt2661_softc *sc = ic->ic_softc; 1560 int error; 1561 1562 RAL_LOCK(sc); 1563 if ((sc->sc_flags & RAL_RUNNING) == 0) { 1564 RAL_UNLOCK(sc); 1565 return (ENXIO); 1566 } 1567 error = mbufq_enqueue(&sc->sc_snd, m); 1568 if (error) { 1569 RAL_UNLOCK(sc); 1570 return (error); 1571 } 1572 rt2661_start(sc); 1573 RAL_UNLOCK(sc); 1574 1575 return (0); 1576 } 1577 1578 static void 1579 rt2661_start(struct rt2661_softc *sc) 1580 { 1581 struct mbuf *m; 1582 struct ieee80211_node *ni; 1583 int ac; 1584 1585 RAL_LOCK_ASSERT(sc); 1586 1587 /* prevent management frames from being sent if we're not ready */ 1588 if (!(sc->sc_flags & RAL_RUNNING) || sc->sc_invalid) 1589 return; 1590 1591 while ((m = mbufq_dequeue(&sc->sc_snd)) != NULL) { 1592 ac = M_WME_GETAC(m); 1593 if (sc->txq[ac].queued >= RT2661_TX_RING_COUNT - 1) { 1594 /* there is no place left in this ring */ 1595 mbufq_prepend(&sc->sc_snd, m); 1596 break; 1597 } 1598 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1599 if (rt2661_tx_data(sc, m, ni, ac) != 0) { 1600 if_inc_counter(ni->ni_vap->iv_ifp, 1601 IFCOUNTER_OERRORS, 1); 1602 ieee80211_free_node(ni); 1603 break; 1604 } 1605 sc->sc_tx_timer = 5; 1606 } 1607 } 1608 1609 static int 1610 rt2661_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1611 const struct ieee80211_bpf_params *params) 1612 { 1613 struct ieee80211com *ic = ni->ni_ic; 1614 struct rt2661_softc *sc = ic->ic_softc; 1615 1616 RAL_LOCK(sc); 1617 1618 /* prevent management frames from being sent if we're not ready */ 1619 if (!(sc->sc_flags & RAL_RUNNING)) { 1620 RAL_UNLOCK(sc); 1621 m_freem(m); 1622 return ENETDOWN; 1623 } 1624 if (sc->mgtq.queued >= RT2661_MGT_RING_COUNT) { 1625 RAL_UNLOCK(sc); 1626 m_freem(m); 1627 return ENOBUFS; /* XXX */ 1628 } 1629 1630 /* 1631 * Legacy path; interpret frame contents to decide 1632 * precisely how to send the frame. 1633 * XXX raw path 1634 */ 1635 if (rt2661_tx_mgt(sc, m, ni) != 0) 1636 goto bad; 1637 sc->sc_tx_timer = 5; 1638 1639 RAL_UNLOCK(sc); 1640 1641 return 0; 1642 bad: 1643 RAL_UNLOCK(sc); 1644 return EIO; /* XXX */ 1645 } 1646 1647 static void 1648 rt2661_watchdog(void *arg) 1649 { 1650 struct rt2661_softc *sc = (struct rt2661_softc *)arg; 1651 1652 RAL_LOCK_ASSERT(sc); 1653 1654 KASSERT(sc->sc_flags & RAL_RUNNING, ("not running")); 1655 1656 if (sc->sc_invalid) /* card ejected */ 1657 return; 1658 1659 if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) { 1660 device_printf(sc->sc_dev, "device timeout\n"); 1661 rt2661_init_locked(sc); 1662 counter_u64_add(sc->sc_ic.ic_oerrors, 1); 1663 /* NB: callout is reset in rt2661_init() */ 1664 return; 1665 } 1666 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 1667 } 1668 1669 static void 1670 rt2661_parent(struct ieee80211com *ic) 1671 { 1672 struct rt2661_softc *sc = ic->ic_softc; 1673 int startall = 0; 1674 1675 RAL_LOCK(sc); 1676 if (ic->ic_nrunning > 0) { 1677 if ((sc->sc_flags & RAL_RUNNING) == 0) { 1678 rt2661_init_locked(sc); 1679 startall = 1; 1680 } else 1681 rt2661_update_promisc(ic); 1682 } else if (sc->sc_flags & RAL_RUNNING) 1683 rt2661_stop_locked(sc); 1684 RAL_UNLOCK(sc); 1685 if (startall) 1686 ieee80211_start_all(ic); 1687 } 1688 1689 static void 1690 rt2661_bbp_write(struct rt2661_softc *sc, uint8_t reg, uint8_t val) 1691 { 1692 uint32_t tmp; 1693 int ntries; 1694 1695 for (ntries = 0; ntries < 100; ntries++) { 1696 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1697 break; 1698 DELAY(1); 1699 } 1700 if (ntries == 100) { 1701 device_printf(sc->sc_dev, "could not write to BBP\n"); 1702 return; 1703 } 1704 1705 tmp = RT2661_BBP_BUSY | (reg & 0x7f) << 8 | val; 1706 RAL_WRITE(sc, RT2661_PHY_CSR3, tmp); 1707 1708 DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val); 1709 } 1710 1711 static uint8_t 1712 rt2661_bbp_read(struct rt2661_softc *sc, uint8_t reg) 1713 { 1714 uint32_t val; 1715 int ntries; 1716 1717 for (ntries = 0; ntries < 100; ntries++) { 1718 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1719 break; 1720 DELAY(1); 1721 } 1722 if (ntries == 100) { 1723 device_printf(sc->sc_dev, "could not read from BBP\n"); 1724 return 0; 1725 } 1726 1727 val = RT2661_BBP_BUSY | RT2661_BBP_READ | reg << 8; 1728 RAL_WRITE(sc, RT2661_PHY_CSR3, val); 1729 1730 for (ntries = 0; ntries < 100; ntries++) { 1731 val = RAL_READ(sc, RT2661_PHY_CSR3); 1732 if (!(val & RT2661_BBP_BUSY)) 1733 return val & 0xff; 1734 DELAY(1); 1735 } 1736 1737 device_printf(sc->sc_dev, "could not read from BBP\n"); 1738 return 0; 1739 } 1740 1741 static void 1742 rt2661_rf_write(struct rt2661_softc *sc, uint8_t reg, uint32_t val) 1743 { 1744 uint32_t tmp; 1745 int ntries; 1746 1747 for (ntries = 0; ntries < 100; ntries++) { 1748 if (!(RAL_READ(sc, RT2661_PHY_CSR4) & RT2661_RF_BUSY)) 1749 break; 1750 DELAY(1); 1751 } 1752 if (ntries == 100) { 1753 device_printf(sc->sc_dev, "could not write to RF\n"); 1754 return; 1755 } 1756 1757 tmp = RT2661_RF_BUSY | RT2661_RF_21BIT | (val & 0x1fffff) << 2 | 1758 (reg & 3); 1759 RAL_WRITE(sc, RT2661_PHY_CSR4, tmp); 1760 1761 /* remember last written value in sc */ 1762 sc->rf_regs[reg] = val; 1763 1764 DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 3, val & 0x1fffff); 1765 } 1766 1767 static int 1768 rt2661_tx_cmd(struct rt2661_softc *sc, uint8_t cmd, uint16_t arg) 1769 { 1770 if (RAL_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY) 1771 return EIO; /* there is already a command pending */ 1772 1773 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 1774 RT2661_H2M_BUSY | RT2661_TOKEN_NO_INTR << 16 | arg); 1775 1776 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, RT2661_KICK_CMD | cmd); 1777 1778 return 0; 1779 } 1780 1781 static void 1782 rt2661_select_antenna(struct rt2661_softc *sc) 1783 { 1784 uint8_t bbp4, bbp77; 1785 uint32_t tmp; 1786 1787 bbp4 = rt2661_bbp_read(sc, 4); 1788 bbp77 = rt2661_bbp_read(sc, 77); 1789 1790 /* TBD */ 1791 1792 /* make sure Rx is disabled before switching antenna */ 1793 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 1794 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 1795 1796 rt2661_bbp_write(sc, 4, bbp4); 1797 rt2661_bbp_write(sc, 77, bbp77); 1798 1799 /* restore Rx filter */ 1800 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 1801 } 1802 1803 /* 1804 * Enable multi-rate retries for frames sent at OFDM rates. 1805 * In 802.11b/g mode, allow fallback to CCK rates. 1806 */ 1807 static void 1808 rt2661_enable_mrr(struct rt2661_softc *sc) 1809 { 1810 struct ieee80211com *ic = &sc->sc_ic; 1811 uint32_t tmp; 1812 1813 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1814 1815 tmp &= ~RT2661_MRR_CCK_FALLBACK; 1816 if (!IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan)) 1817 tmp |= RT2661_MRR_CCK_FALLBACK; 1818 tmp |= RT2661_MRR_ENABLED; 1819 1820 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1821 } 1822 1823 static void 1824 rt2661_set_txpreamble(struct rt2661_softc *sc) 1825 { 1826 struct ieee80211com *ic = &sc->sc_ic; 1827 uint32_t tmp; 1828 1829 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1830 1831 tmp &= ~RT2661_SHORT_PREAMBLE; 1832 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 1833 tmp |= RT2661_SHORT_PREAMBLE; 1834 1835 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1836 } 1837 1838 static void 1839 rt2661_set_basicrates(struct rt2661_softc *sc, 1840 const struct ieee80211_rateset *rs) 1841 { 1842 struct ieee80211com *ic = &sc->sc_ic; 1843 uint32_t mask = 0; 1844 uint8_t rate; 1845 int i; 1846 1847 for (i = 0; i < rs->rs_nrates; i++) { 1848 rate = rs->rs_rates[i]; 1849 1850 if (!(rate & IEEE80211_RATE_BASIC)) 1851 continue; 1852 1853 mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt, 1854 IEEE80211_RV(rate)); 1855 } 1856 1857 RAL_WRITE(sc, RT2661_TXRX_CSR5, mask); 1858 1859 DPRINTF(sc, "Setting basic rate mask to 0x%x\n", mask); 1860 } 1861 1862 /* 1863 * Reprogram MAC/BBP to switch to a new band. Values taken from the reference 1864 * driver. 1865 */ 1866 static void 1867 rt2661_select_band(struct rt2661_softc *sc, struct ieee80211_channel *c) 1868 { 1869 uint8_t bbp17, bbp35, bbp96, bbp97, bbp98, bbp104; 1870 uint32_t tmp; 1871 1872 /* update all BBP registers that depend on the band */ 1873 bbp17 = 0x20; bbp96 = 0x48; bbp104 = 0x2c; 1874 bbp35 = 0x50; bbp97 = 0x48; bbp98 = 0x48; 1875 if (IEEE80211_IS_CHAN_5GHZ(c)) { 1876 bbp17 += 0x08; bbp96 += 0x10; bbp104 += 0x0c; 1877 bbp35 += 0x10; bbp97 += 0x10; bbp98 += 0x10; 1878 } 1879 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1880 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1881 bbp17 += 0x10; bbp96 += 0x10; bbp104 += 0x10; 1882 } 1883 1884 rt2661_bbp_write(sc, 17, bbp17); 1885 rt2661_bbp_write(sc, 96, bbp96); 1886 rt2661_bbp_write(sc, 104, bbp104); 1887 1888 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1889 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1890 rt2661_bbp_write(sc, 75, 0x80); 1891 rt2661_bbp_write(sc, 86, 0x80); 1892 rt2661_bbp_write(sc, 88, 0x80); 1893 } 1894 1895 rt2661_bbp_write(sc, 35, bbp35); 1896 rt2661_bbp_write(sc, 97, bbp97); 1897 rt2661_bbp_write(sc, 98, bbp98); 1898 1899 tmp = RAL_READ(sc, RT2661_PHY_CSR0); 1900 tmp &= ~(RT2661_PA_PE_2GHZ | RT2661_PA_PE_5GHZ); 1901 if (IEEE80211_IS_CHAN_2GHZ(c)) 1902 tmp |= RT2661_PA_PE_2GHZ; 1903 else 1904 tmp |= RT2661_PA_PE_5GHZ; 1905 RAL_WRITE(sc, RT2661_PHY_CSR0, tmp); 1906 } 1907 1908 static void 1909 rt2661_set_chan(struct rt2661_softc *sc, struct ieee80211_channel *c) 1910 { 1911 struct ieee80211com *ic = &sc->sc_ic; 1912 const struct rfprog *rfprog; 1913 uint8_t bbp3, bbp94 = RT2661_BBPR94_DEFAULT; 1914 int8_t power; 1915 u_int i, chan; 1916 1917 chan = ieee80211_chan2ieee(ic, c); 1918 KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan)); 1919 1920 /* select the appropriate RF settings based on what EEPROM says */ 1921 rfprog = (sc->rfprog == 0) ? rt2661_rf5225_1 : rt2661_rf5225_2; 1922 1923 /* find the settings for this channel (we know it exists) */ 1924 for (i = 0; rfprog[i].chan != chan; i++); 1925 1926 power = sc->txpow[i]; 1927 if (power < 0) { 1928 bbp94 += power; 1929 power = 0; 1930 } else if (power > 31) { 1931 bbp94 += power - 31; 1932 power = 31; 1933 } 1934 1935 /* 1936 * If we are switching from the 2GHz band to the 5GHz band or 1937 * vice-versa, BBP registers need to be reprogrammed. 1938 */ 1939 if (c->ic_flags != sc->sc_curchan->ic_flags) { 1940 rt2661_select_band(sc, c); 1941 rt2661_select_antenna(sc); 1942 } 1943 sc->sc_curchan = c; 1944 1945 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1946 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1947 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 1948 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1949 1950 DELAY(200); 1951 1952 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1953 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1954 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7 | 1); 1955 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1956 1957 DELAY(200); 1958 1959 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1960 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1961 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 1962 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1963 1964 /* enable smart mode for MIMO-capable RFs */ 1965 bbp3 = rt2661_bbp_read(sc, 3); 1966 1967 bbp3 &= ~RT2661_SMART_MODE; 1968 if (sc->rf_rev == RT2661_RF_5325 || sc->rf_rev == RT2661_RF_2529) 1969 bbp3 |= RT2661_SMART_MODE; 1970 1971 rt2661_bbp_write(sc, 3, bbp3); 1972 1973 if (bbp94 != RT2661_BBPR94_DEFAULT) 1974 rt2661_bbp_write(sc, 94, bbp94); 1975 1976 /* 5GHz radio needs a 1ms delay here */ 1977 if (IEEE80211_IS_CHAN_5GHZ(c)) 1978 DELAY(1000); 1979 } 1980 1981 static void 1982 rt2661_set_bssid(struct rt2661_softc *sc, const uint8_t *bssid) 1983 { 1984 uint32_t tmp; 1985 1986 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 1987 RAL_WRITE(sc, RT2661_MAC_CSR4, tmp); 1988 1989 tmp = bssid[4] | bssid[5] << 8 | RT2661_ONE_BSSID << 16; 1990 RAL_WRITE(sc, RT2661_MAC_CSR5, tmp); 1991 } 1992 1993 static void 1994 rt2661_set_macaddr(struct rt2661_softc *sc, const uint8_t *addr) 1995 { 1996 uint32_t tmp; 1997 1998 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 1999 RAL_WRITE(sc, RT2661_MAC_CSR2, tmp); 2000 2001 tmp = addr[4] | addr[5] << 8; 2002 RAL_WRITE(sc, RT2661_MAC_CSR3, tmp); 2003 } 2004 2005 static void 2006 rt2661_update_promisc(struct ieee80211com *ic) 2007 { 2008 struct rt2661_softc *sc = ic->ic_softc; 2009 uint32_t tmp; 2010 2011 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2012 2013 tmp &= ~RT2661_DROP_NOT_TO_ME; 2014 if (ic->ic_promisc == 0) 2015 tmp |= RT2661_DROP_NOT_TO_ME; 2016 2017 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2018 2019 DPRINTF(sc, "%s promiscuous mode\n", 2020 (ic->ic_promisc > 0) ? "entering" : "leaving"); 2021 } 2022 2023 /* 2024 * Update QoS (802.11e) settings for each h/w Tx ring. 2025 */ 2026 static int 2027 rt2661_wme_update(struct ieee80211com *ic) 2028 { 2029 struct rt2661_softc *sc = ic->ic_softc; 2030 struct chanAccParams chp; 2031 const struct wmeParams *wmep; 2032 2033 ieee80211_wme_ic_getparams(ic, &chp); 2034 2035 wmep = chp.cap_wmeParams; 2036 2037 /* XXX: not sure about shifts. */ 2038 /* XXX: the reference driver plays with AC_VI settings too. */ 2039 2040 /* update TxOp */ 2041 RAL_WRITE(sc, RT2661_AC_TXOP_CSR0, 2042 wmep[WME_AC_BE].wmep_txopLimit << 16 | 2043 wmep[WME_AC_BK].wmep_txopLimit); 2044 RAL_WRITE(sc, RT2661_AC_TXOP_CSR1, 2045 wmep[WME_AC_VI].wmep_txopLimit << 16 | 2046 wmep[WME_AC_VO].wmep_txopLimit); 2047 2048 /* update CWmin */ 2049 RAL_WRITE(sc, RT2661_CWMIN_CSR, 2050 wmep[WME_AC_BE].wmep_logcwmin << 12 | 2051 wmep[WME_AC_BK].wmep_logcwmin << 8 | 2052 wmep[WME_AC_VI].wmep_logcwmin << 4 | 2053 wmep[WME_AC_VO].wmep_logcwmin); 2054 2055 /* update CWmax */ 2056 RAL_WRITE(sc, RT2661_CWMAX_CSR, 2057 wmep[WME_AC_BE].wmep_logcwmax << 12 | 2058 wmep[WME_AC_BK].wmep_logcwmax << 8 | 2059 wmep[WME_AC_VI].wmep_logcwmax << 4 | 2060 wmep[WME_AC_VO].wmep_logcwmax); 2061 2062 /* update Aifsn */ 2063 RAL_WRITE(sc, RT2661_AIFSN_CSR, 2064 wmep[WME_AC_BE].wmep_aifsn << 12 | 2065 wmep[WME_AC_BK].wmep_aifsn << 8 | 2066 wmep[WME_AC_VI].wmep_aifsn << 4 | 2067 wmep[WME_AC_VO].wmep_aifsn); 2068 2069 return 0; 2070 } 2071 2072 static void 2073 rt2661_update_slot(struct ieee80211com *ic) 2074 { 2075 struct rt2661_softc *sc = ic->ic_softc; 2076 uint8_t slottime; 2077 uint32_t tmp; 2078 2079 slottime = IEEE80211_GET_SLOTTIME(ic); 2080 2081 tmp = RAL_READ(sc, RT2661_MAC_CSR9); 2082 tmp = (tmp & ~0xff) | slottime; 2083 RAL_WRITE(sc, RT2661_MAC_CSR9, tmp); 2084 } 2085 2086 static const char * 2087 rt2661_get_rf(int rev) 2088 { 2089 switch (rev) { 2090 case RT2661_RF_5225: return "RT5225"; 2091 case RT2661_RF_5325: return "RT5325 (MIMO XR)"; 2092 case RT2661_RF_2527: return "RT2527"; 2093 case RT2661_RF_2529: return "RT2529 (MIMO XR)"; 2094 default: return "unknown"; 2095 } 2096 } 2097 2098 static void 2099 rt2661_read_eeprom(struct rt2661_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2100 { 2101 uint16_t val; 2102 int i; 2103 2104 /* read MAC address */ 2105 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC01); 2106 macaddr[0] = val & 0xff; 2107 macaddr[1] = val >> 8; 2108 2109 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC23); 2110 macaddr[2] = val & 0xff; 2111 macaddr[3] = val >> 8; 2112 2113 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC45); 2114 macaddr[4] = val & 0xff; 2115 macaddr[5] = val >> 8; 2116 2117 val = rt2661_eeprom_read(sc, RT2661_EEPROM_ANTENNA); 2118 /* XXX: test if different from 0xffff? */ 2119 sc->rf_rev = (val >> 11) & 0x1f; 2120 sc->hw_radio = (val >> 10) & 0x1; 2121 sc->rx_ant = (val >> 4) & 0x3; 2122 sc->tx_ant = (val >> 2) & 0x3; 2123 sc->nb_ant = val & 0x3; 2124 2125 DPRINTF(sc, "RF revision=%d\n", sc->rf_rev); 2126 2127 val = rt2661_eeprom_read(sc, RT2661_EEPROM_CONFIG2); 2128 sc->ext_5ghz_lna = (val >> 6) & 0x1; 2129 sc->ext_2ghz_lna = (val >> 4) & 0x1; 2130 2131 DPRINTF(sc, "External 2GHz LNA=%d\nExternal 5GHz LNA=%d\n", 2132 sc->ext_2ghz_lna, sc->ext_5ghz_lna); 2133 2134 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_2GHZ_OFFSET); 2135 if ((val & 0xff) != 0xff) 2136 sc->rssi_2ghz_corr = (int8_t)(val & 0xff); /* signed */ 2137 2138 /* Only [-10, 10] is valid */ 2139 if (sc->rssi_2ghz_corr < -10 || sc->rssi_2ghz_corr > 10) 2140 sc->rssi_2ghz_corr = 0; 2141 2142 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_5GHZ_OFFSET); 2143 if ((val & 0xff) != 0xff) 2144 sc->rssi_5ghz_corr = (int8_t)(val & 0xff); /* signed */ 2145 2146 /* Only [-10, 10] is valid */ 2147 if (sc->rssi_5ghz_corr < -10 || sc->rssi_5ghz_corr > 10) 2148 sc->rssi_5ghz_corr = 0; 2149 2150 /* adjust RSSI correction for external low-noise amplifier */ 2151 if (sc->ext_2ghz_lna) 2152 sc->rssi_2ghz_corr -= 14; 2153 if (sc->ext_5ghz_lna) 2154 sc->rssi_5ghz_corr -= 14; 2155 2156 DPRINTF(sc, "RSSI 2GHz corr=%d\nRSSI 5GHz corr=%d\n", 2157 sc->rssi_2ghz_corr, sc->rssi_5ghz_corr); 2158 2159 val = rt2661_eeprom_read(sc, RT2661_EEPROM_FREQ_OFFSET); 2160 if ((val >> 8) != 0xff) 2161 sc->rfprog = (val >> 8) & 0x3; 2162 if ((val & 0xff) != 0xff) 2163 sc->rffreq = val & 0xff; 2164 2165 DPRINTF(sc, "RF prog=%d\nRF freq=%d\n", sc->rfprog, sc->rffreq); 2166 2167 /* read Tx power for all a/b/g channels */ 2168 for (i = 0; i < 19; i++) { 2169 val = rt2661_eeprom_read(sc, RT2661_EEPROM_TXPOWER + i); 2170 sc->txpow[i * 2] = (int8_t)(val >> 8); /* signed */ 2171 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2172 rt2661_rf5225_1[i * 2].chan, sc->txpow[i * 2]); 2173 sc->txpow[i * 2 + 1] = (int8_t)(val & 0xff); /* signed */ 2174 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2175 rt2661_rf5225_1[i * 2 + 1].chan, sc->txpow[i * 2 + 1]); 2176 } 2177 2178 /* read vendor-specific BBP values */ 2179 for (i = 0; i < 16; i++) { 2180 val = rt2661_eeprom_read(sc, RT2661_EEPROM_BBP_BASE + i); 2181 if (val == 0 || val == 0xffff) 2182 continue; /* skip invalid entries */ 2183 sc->bbp_prom[i].reg = val >> 8; 2184 sc->bbp_prom[i].val = val & 0xff; 2185 DPRINTF(sc, "BBP R%d=%02x\n", sc->bbp_prom[i].reg, 2186 sc->bbp_prom[i].val); 2187 } 2188 } 2189 2190 static int 2191 rt2661_bbp_init(struct rt2661_softc *sc) 2192 { 2193 int i, ntries; 2194 uint8_t val; 2195 2196 /* wait for BBP to be ready */ 2197 for (ntries = 0; ntries < 100; ntries++) { 2198 val = rt2661_bbp_read(sc, 0); 2199 if (val != 0 && val != 0xff) 2200 break; 2201 DELAY(100); 2202 } 2203 if (ntries == 100) { 2204 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2205 return EIO; 2206 } 2207 2208 /* initialize BBP registers to default values */ 2209 for (i = 0; i < nitems(rt2661_def_bbp); i++) { 2210 rt2661_bbp_write(sc, rt2661_def_bbp[i].reg, 2211 rt2661_def_bbp[i].val); 2212 } 2213 2214 /* write vendor-specific BBP values (from EEPROM) */ 2215 for (i = 0; i < 16; i++) { 2216 if (sc->bbp_prom[i].reg == 0) 2217 continue; 2218 rt2661_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2219 } 2220 2221 return 0; 2222 } 2223 2224 static void 2225 rt2661_init_locked(struct rt2661_softc *sc) 2226 { 2227 struct ieee80211com *ic = &sc->sc_ic; 2228 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2229 uint32_t tmp, sta[3]; 2230 int i, error, ntries; 2231 2232 RAL_LOCK_ASSERT(sc); 2233 2234 if ((sc->sc_flags & RAL_FW_LOADED) == 0) { 2235 error = rt2661_load_microcode(sc); 2236 if (error != 0) { 2237 device_printf(sc->sc_dev, 2238 "%s: could not load 8051 microcode, error %d\n", 2239 __func__, error); 2240 return; 2241 } 2242 sc->sc_flags |= RAL_FW_LOADED; 2243 } 2244 2245 rt2661_stop_locked(sc); 2246 2247 /* initialize Tx rings */ 2248 RAL_WRITE(sc, RT2661_AC1_BASE_CSR, sc->txq[1].physaddr); 2249 RAL_WRITE(sc, RT2661_AC0_BASE_CSR, sc->txq[0].physaddr); 2250 RAL_WRITE(sc, RT2661_AC2_BASE_CSR, sc->txq[2].physaddr); 2251 RAL_WRITE(sc, RT2661_AC3_BASE_CSR, sc->txq[3].physaddr); 2252 2253 /* initialize Mgt ring */ 2254 RAL_WRITE(sc, RT2661_MGT_BASE_CSR, sc->mgtq.physaddr); 2255 2256 /* initialize Rx ring */ 2257 RAL_WRITE(sc, RT2661_RX_BASE_CSR, sc->rxq.physaddr); 2258 2259 /* initialize Tx rings sizes */ 2260 RAL_WRITE(sc, RT2661_TX_RING_CSR0, 2261 RT2661_TX_RING_COUNT << 24 | 2262 RT2661_TX_RING_COUNT << 16 | 2263 RT2661_TX_RING_COUNT << 8 | 2264 RT2661_TX_RING_COUNT); 2265 2266 RAL_WRITE(sc, RT2661_TX_RING_CSR1, 2267 RT2661_TX_DESC_WSIZE << 16 | 2268 RT2661_TX_RING_COUNT << 8 | /* XXX: HCCA ring unused */ 2269 RT2661_MGT_RING_COUNT); 2270 2271 /* initialize Rx rings */ 2272 RAL_WRITE(sc, RT2661_RX_RING_CSR, 2273 RT2661_RX_DESC_BACK << 16 | 2274 RT2661_RX_DESC_WSIZE << 8 | 2275 RT2661_RX_RING_COUNT); 2276 2277 /* XXX: some magic here */ 2278 RAL_WRITE(sc, RT2661_TX_DMA_DST_CSR, 0xaa); 2279 2280 /* load base addresses of all 5 Tx rings (4 data + 1 mgt) */ 2281 RAL_WRITE(sc, RT2661_LOAD_TX_RING_CSR, 0x1f); 2282 2283 /* load base address of Rx ring */ 2284 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 2); 2285 2286 /* initialize MAC registers to default values */ 2287 for (i = 0; i < nitems(rt2661_def_mac); i++) 2288 RAL_WRITE(sc, rt2661_def_mac[i].reg, rt2661_def_mac[i].val); 2289 2290 rt2661_set_macaddr(sc, vap ? vap->iv_myaddr : ic->ic_macaddr); 2291 2292 /* set host ready */ 2293 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2294 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2295 2296 /* wait for BBP/RF to wakeup */ 2297 for (ntries = 0; ntries < 1000; ntries++) { 2298 if (RAL_READ(sc, RT2661_MAC_CSR12) & 8) 2299 break; 2300 DELAY(1000); 2301 } 2302 if (ntries == 1000) { 2303 printf("timeout waiting for BBP/RF to wakeup\n"); 2304 rt2661_stop_locked(sc); 2305 return; 2306 } 2307 2308 if (rt2661_bbp_init(sc) != 0) { 2309 rt2661_stop_locked(sc); 2310 return; 2311 } 2312 2313 /* select default channel */ 2314 sc->sc_curchan = ic->ic_curchan; 2315 rt2661_select_band(sc, sc->sc_curchan); 2316 rt2661_select_antenna(sc); 2317 rt2661_set_chan(sc, sc->sc_curchan); 2318 2319 /* update Rx filter */ 2320 tmp = RAL_READ(sc, RT2661_TXRX_CSR0) & 0xffff; 2321 2322 tmp |= RT2661_DROP_PHY_ERROR | RT2661_DROP_CRC_ERROR; 2323 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2324 tmp |= RT2661_DROP_CTL | RT2661_DROP_VER_ERROR | 2325 RT2661_DROP_ACKCTS; 2326 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 2327 ic->ic_opmode != IEEE80211_M_MBSS) 2328 tmp |= RT2661_DROP_TODS; 2329 if (ic->ic_promisc == 0) 2330 tmp |= RT2661_DROP_NOT_TO_ME; 2331 } 2332 2333 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2334 2335 /* clear STA registers */ 2336 RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, nitems(sta)); 2337 2338 /* initialize ASIC */ 2339 RAL_WRITE(sc, RT2661_MAC_CSR1, 4); 2340 2341 /* clear any pending interrupt */ 2342 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2343 2344 /* enable interrupts */ 2345 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 2346 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 2347 2348 /* kick Rx */ 2349 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 1); 2350 2351 sc->sc_flags |= RAL_RUNNING; 2352 2353 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 2354 } 2355 2356 static void 2357 rt2661_init(void *priv) 2358 { 2359 struct rt2661_softc *sc = priv; 2360 struct ieee80211com *ic = &sc->sc_ic; 2361 2362 RAL_LOCK(sc); 2363 rt2661_init_locked(sc); 2364 RAL_UNLOCK(sc); 2365 2366 if (sc->sc_flags & RAL_RUNNING) 2367 ieee80211_start_all(ic); /* start all vap's */ 2368 } 2369 2370 void 2371 rt2661_stop_locked(struct rt2661_softc *sc) 2372 { 2373 volatile int *flags = &sc->sc_flags; 2374 uint32_t tmp; 2375 2376 while (*flags & RAL_INPUT_RUNNING) 2377 msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10); 2378 2379 callout_stop(&sc->watchdog_ch); 2380 sc->sc_tx_timer = 0; 2381 2382 if (sc->sc_flags & RAL_RUNNING) { 2383 sc->sc_flags &= ~RAL_RUNNING; 2384 2385 /* abort Tx (for all 5 Tx rings) */ 2386 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 0x1f << 16); 2387 2388 /* disable Rx (value remains after reset!) */ 2389 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2390 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2391 2392 /* reset ASIC */ 2393 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2394 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2395 2396 /* disable interrupts */ 2397 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffffff); 2398 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 2399 2400 /* clear any pending interrupt */ 2401 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2402 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, 0xffffffff); 2403 2404 /* reset Tx and Rx rings */ 2405 rt2661_reset_tx_ring(sc, &sc->txq[0]); 2406 rt2661_reset_tx_ring(sc, &sc->txq[1]); 2407 rt2661_reset_tx_ring(sc, &sc->txq[2]); 2408 rt2661_reset_tx_ring(sc, &sc->txq[3]); 2409 rt2661_reset_tx_ring(sc, &sc->mgtq); 2410 rt2661_reset_rx_ring(sc, &sc->rxq); 2411 } 2412 } 2413 2414 void 2415 rt2661_stop(void *priv) 2416 { 2417 struct rt2661_softc *sc = priv; 2418 2419 RAL_LOCK(sc); 2420 rt2661_stop_locked(sc); 2421 RAL_UNLOCK(sc); 2422 } 2423 2424 static int 2425 rt2661_load_microcode(struct rt2661_softc *sc) 2426 { 2427 const struct firmware *fp; 2428 const char *imagename; 2429 int ntries, error; 2430 2431 RAL_LOCK_ASSERT(sc); 2432 2433 switch (sc->sc_id) { 2434 case 0x0301: imagename = "rt2561sfw"; break; 2435 case 0x0302: imagename = "rt2561fw"; break; 2436 case 0x0401: imagename = "rt2661fw"; break; 2437 default: 2438 device_printf(sc->sc_dev, "%s: unexpected pci device id 0x%x, " 2439 "don't know how to retrieve firmware\n", 2440 __func__, sc->sc_id); 2441 return EINVAL; 2442 } 2443 RAL_UNLOCK(sc); 2444 fp = firmware_get(imagename); 2445 RAL_LOCK(sc); 2446 if (fp == NULL) { 2447 device_printf(sc->sc_dev, 2448 "%s: unable to retrieve firmware image %s\n", 2449 __func__, imagename); 2450 return EINVAL; 2451 } 2452 2453 /* 2454 * Load 8051 microcode into NIC. 2455 */ 2456 /* reset 8051 */ 2457 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2458 2459 /* cancel any pending Host to MCU command */ 2460 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0); 2461 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 2462 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, 0); 2463 2464 /* write 8051's microcode */ 2465 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET | RT2661_MCU_SEL); 2466 RAL_WRITE_REGION_1(sc, RT2661_MCU_CODE_BASE, fp->data, fp->datasize); 2467 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2468 2469 /* kick 8051's ass */ 2470 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, 0); 2471 2472 /* wait for 8051 to initialize */ 2473 for (ntries = 0; ntries < 500; ntries++) { 2474 if (RAL_READ(sc, RT2661_MCU_CNTL_CSR) & RT2661_MCU_READY) 2475 break; 2476 DELAY(100); 2477 } 2478 if (ntries == 500) { 2479 device_printf(sc->sc_dev, 2480 "%s: timeout waiting for MCU to initialize\n", __func__); 2481 error = EIO; 2482 } else 2483 error = 0; 2484 2485 firmware_put(fp, FIRMWARE_UNLOAD); 2486 return error; 2487 } 2488 2489 #ifdef notyet 2490 /* 2491 * Dynamically tune Rx sensitivity (BBP register 17) based on average RSSI and 2492 * false CCA count. This function is called periodically (every seconds) when 2493 * in the RUN state. Values taken from the reference driver. 2494 */ 2495 static void 2496 rt2661_rx_tune(struct rt2661_softc *sc) 2497 { 2498 uint8_t bbp17; 2499 uint16_t cca; 2500 int lo, hi, dbm; 2501 2502 /* 2503 * Tuning range depends on operating band and on the presence of an 2504 * external low-noise amplifier. 2505 */ 2506 lo = 0x20; 2507 if (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan)) 2508 lo += 0x08; 2509 if ((IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan) && sc->ext_2ghz_lna) || 2510 (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan) && sc->ext_5ghz_lna)) 2511 lo += 0x10; 2512 hi = lo + 0x20; 2513 2514 /* retrieve false CCA count since last call (clear on read) */ 2515 cca = RAL_READ(sc, RT2661_STA_CSR1) & 0xffff; 2516 2517 if (dbm >= -35) { 2518 bbp17 = 0x60; 2519 } else if (dbm >= -58) { 2520 bbp17 = hi; 2521 } else if (dbm >= -66) { 2522 bbp17 = lo + 0x10; 2523 } else if (dbm >= -74) { 2524 bbp17 = lo + 0x08; 2525 } else { 2526 /* RSSI < -74dBm, tune using false CCA count */ 2527 2528 bbp17 = sc->bbp17; /* current value */ 2529 2530 hi -= 2 * (-74 - dbm); 2531 if (hi < lo) 2532 hi = lo; 2533 2534 if (bbp17 > hi) { 2535 bbp17 = hi; 2536 2537 } else if (cca > 512) { 2538 if (++bbp17 > hi) 2539 bbp17 = hi; 2540 } else if (cca < 100) { 2541 if (--bbp17 < lo) 2542 bbp17 = lo; 2543 } 2544 } 2545 2546 if (bbp17 != sc->bbp17) { 2547 rt2661_bbp_write(sc, 17, bbp17); 2548 sc->bbp17 = bbp17; 2549 } 2550 } 2551 2552 /* 2553 * Enter/Leave radar detection mode. 2554 * This is for 802.11h additional regulatory domains. 2555 */ 2556 static void 2557 rt2661_radar_start(struct rt2661_softc *sc) 2558 { 2559 uint32_t tmp; 2560 2561 /* disable Rx */ 2562 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2563 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2564 2565 rt2661_bbp_write(sc, 82, 0x20); 2566 rt2661_bbp_write(sc, 83, 0x00); 2567 rt2661_bbp_write(sc, 84, 0x40); 2568 2569 /* save current BBP registers values */ 2570 sc->bbp18 = rt2661_bbp_read(sc, 18); 2571 sc->bbp21 = rt2661_bbp_read(sc, 21); 2572 sc->bbp22 = rt2661_bbp_read(sc, 22); 2573 sc->bbp16 = rt2661_bbp_read(sc, 16); 2574 sc->bbp17 = rt2661_bbp_read(sc, 17); 2575 sc->bbp64 = rt2661_bbp_read(sc, 64); 2576 2577 rt2661_bbp_write(sc, 18, 0xff); 2578 rt2661_bbp_write(sc, 21, 0x3f); 2579 rt2661_bbp_write(sc, 22, 0x3f); 2580 rt2661_bbp_write(sc, 16, 0xbd); 2581 rt2661_bbp_write(sc, 17, sc->ext_5ghz_lna ? 0x44 : 0x34); 2582 rt2661_bbp_write(sc, 64, 0x21); 2583 2584 /* restore Rx filter */ 2585 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2586 } 2587 2588 static int 2589 rt2661_radar_stop(struct rt2661_softc *sc) 2590 { 2591 uint8_t bbp66; 2592 2593 /* read radar detection result */ 2594 bbp66 = rt2661_bbp_read(sc, 66); 2595 2596 /* restore BBP registers values */ 2597 rt2661_bbp_write(sc, 16, sc->bbp16); 2598 rt2661_bbp_write(sc, 17, sc->bbp17); 2599 rt2661_bbp_write(sc, 18, sc->bbp18); 2600 rt2661_bbp_write(sc, 21, sc->bbp21); 2601 rt2661_bbp_write(sc, 22, sc->bbp22); 2602 rt2661_bbp_write(sc, 64, sc->bbp64); 2603 2604 return bbp66 == 1; 2605 } 2606 #endif 2607 2608 static int 2609 rt2661_prepare_beacon(struct rt2661_softc *sc, struct ieee80211vap *vap) 2610 { 2611 struct ieee80211com *ic = vap->iv_ic; 2612 struct rt2661_tx_desc desc; 2613 struct mbuf *m0; 2614 int rate; 2615 2616 if ((m0 = ieee80211_beacon_alloc(vap->iv_bss))== NULL) { 2617 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2618 return ENOBUFS; 2619 } 2620 2621 /* send beacons at the lowest available rate */ 2622 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan) ? 12 : 2; 2623 2624 rt2661_setup_tx_desc(sc, &desc, RT2661_TX_TIMESTAMP, RT2661_TX_HWSEQ, 2625 m0->m_pkthdr.len, rate, NULL, 0, RT2661_QID_MGT); 2626 2627 /* copy the first 24 bytes of Tx descriptor into NIC memory */ 2628 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0, (uint8_t *)&desc, 24); 2629 2630 /* copy beacon header and payload into NIC memory */ 2631 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0 + 24, 2632 mtod(m0, uint8_t *), m0->m_pkthdr.len); 2633 2634 m_freem(m0); 2635 2636 return 0; 2637 } 2638 2639 /* 2640 * Enable TSF synchronization and tell h/w to start sending beacons for IBSS 2641 * and HostAP operating modes. 2642 */ 2643 static void 2644 rt2661_enable_tsf_sync(struct rt2661_softc *sc) 2645 { 2646 struct ieee80211com *ic = &sc->sc_ic; 2647 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2648 uint32_t tmp; 2649 2650 if (vap->iv_opmode != IEEE80211_M_STA) { 2651 /* 2652 * Change default 16ms TBTT adjustment to 8ms. 2653 * Must be done before enabling beacon generation. 2654 */ 2655 RAL_WRITE(sc, RT2661_TXRX_CSR10, 1 << 12 | 8); 2656 } 2657 2658 tmp = RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000; 2659 2660 /* set beacon interval (in 1/16ms unit) */ 2661 tmp |= vap->iv_bss->ni_intval * 16; 2662 2663 tmp |= RT2661_TSF_TICKING | RT2661_ENABLE_TBTT; 2664 if (vap->iv_opmode == IEEE80211_M_STA) 2665 tmp |= RT2661_TSF_MODE(1); 2666 else 2667 tmp |= RT2661_TSF_MODE(2) | RT2661_GENERATE_BEACON; 2668 2669 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp); 2670 } 2671 2672 static void 2673 rt2661_enable_tsf(struct rt2661_softc *sc) 2674 { 2675 RAL_WRITE(sc, RT2661_TXRX_CSR9, 2676 (RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000) 2677 | RT2661_TSF_TICKING | RT2661_TSF_MODE(2)); 2678 } 2679 2680 /* 2681 * Retrieve the "Received Signal Strength Indicator" from the raw values 2682 * contained in Rx descriptors. The computation depends on which band the 2683 * frame was received. Correction values taken from the reference driver. 2684 */ 2685 static int 2686 rt2661_get_rssi(struct rt2661_softc *sc, uint8_t raw) 2687 { 2688 int lna, agc, rssi; 2689 2690 lna = (raw >> 5) & 0x3; 2691 agc = raw & 0x1f; 2692 2693 if (lna == 0) { 2694 /* 2695 * No mapping available. 2696 * 2697 * NB: Since RSSI is relative to noise floor, -1 is 2698 * adequate for caller to know error happened. 2699 */ 2700 return -1; 2701 } 2702 2703 rssi = (2 * agc) - RT2661_NOISE_FLOOR; 2704 2705 if (IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan)) { 2706 rssi += sc->rssi_2ghz_corr; 2707 2708 if (lna == 1) 2709 rssi -= 64; 2710 else if (lna == 2) 2711 rssi -= 74; 2712 else if (lna == 3) 2713 rssi -= 90; 2714 } else { 2715 rssi += sc->rssi_5ghz_corr; 2716 2717 if (lna == 1) 2718 rssi -= 64; 2719 else if (lna == 2) 2720 rssi -= 86; 2721 else if (lna == 3) 2722 rssi -= 100; 2723 } 2724 return rssi; 2725 } 2726 2727 static void 2728 rt2661_scan_start(struct ieee80211com *ic) 2729 { 2730 struct rt2661_softc *sc = ic->ic_softc; 2731 uint32_t tmp; 2732 2733 /* abort TSF synchronization */ 2734 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 2735 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0xffffff); 2736 rt2661_set_bssid(sc, ieee80211broadcastaddr); 2737 } 2738 2739 static void 2740 rt2661_scan_end(struct ieee80211com *ic) 2741 { 2742 struct rt2661_softc *sc = ic->ic_softc; 2743 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2744 2745 rt2661_enable_tsf_sync(sc); 2746 /* XXX keep local copy */ 2747 rt2661_set_bssid(sc, vap->iv_bss->ni_bssid); 2748 } 2749 2750 static void 2751 rt2661_getradiocaps(struct ieee80211com *ic, 2752 int maxchans, int *nchans, struct ieee80211_channel chans[]) 2753 { 2754 struct rt2661_softc *sc = ic->ic_softc; 2755 uint8_t bands[IEEE80211_MODE_BYTES]; 2756 2757 memset(bands, 0, sizeof(bands)); 2758 setbit(bands, IEEE80211_MODE_11B); 2759 setbit(bands, IEEE80211_MODE_11G); 2760 ieee80211_add_channels_default_2ghz(chans, maxchans, nchans, bands, 0); 2761 2762 if (sc->rf_rev == RT2661_RF_5225 || sc->rf_rev == RT2661_RF_5325) { 2763 setbit(bands, IEEE80211_MODE_11A); 2764 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans, 2765 rt2661_chan_5ghz, nitems(rt2661_chan_5ghz), bands, 0); 2766 } 2767 } 2768 2769 static void 2770 rt2661_set_channel(struct ieee80211com *ic) 2771 { 2772 struct rt2661_softc *sc = ic->ic_softc; 2773 2774 RAL_LOCK(sc); 2775 rt2661_set_chan(sc, ic->ic_curchan); 2776 RAL_UNLOCK(sc); 2777 2778 } 2779