1 /* $FreeBSD$ */ 2 3 /*- 4 * Copyright (c) 2006 5 * Damien Bergamini <damien.bergamini@free.fr> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __FBSDID("$FreeBSD$"); 22 23 /*- 24 * Ralink Technology RT2561, RT2561S and RT2661 chipset driver 25 * http://www.ralinktech.com/ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/sysctl.h> 30 #include <sys/sockio.h> 31 #include <sys/mbuf.h> 32 #include <sys/kernel.h> 33 #include <sys/socket.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/endian.h> 41 #include <sys/firmware.h> 42 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 47 #include <net/bpf.h> 48 #include <net/if.h> 49 #include <net/if_var.h> 50 #include <net/if_arp.h> 51 #include <net/ethernet.h> 52 #include <net/if_dl.h> 53 #include <net/if_media.h> 54 #include <net/if_types.h> 55 56 #include <net80211/ieee80211_var.h> 57 #include <net80211/ieee80211_radiotap.h> 58 #include <net80211/ieee80211_regdomain.h> 59 #include <net80211/ieee80211_ratectl.h> 60 61 #include <netinet/in.h> 62 #include <netinet/in_systm.h> 63 #include <netinet/in_var.h> 64 #include <netinet/ip.h> 65 #include <netinet/if_ether.h> 66 67 #include <dev/ral/rt2661reg.h> 68 #include <dev/ral/rt2661var.h> 69 70 #define RAL_DEBUG 71 #ifdef RAL_DEBUG 72 #define DPRINTF(sc, fmt, ...) do { \ 73 if (sc->sc_debug > 0) \ 74 printf(fmt, __VA_ARGS__); \ 75 } while (0) 76 #define DPRINTFN(sc, n, fmt, ...) do { \ 77 if (sc->sc_debug >= (n)) \ 78 printf(fmt, __VA_ARGS__); \ 79 } while (0) 80 #else 81 #define DPRINTF(sc, fmt, ...) 82 #define DPRINTFN(sc, n, fmt, ...) 83 #endif 84 85 static struct ieee80211vap *rt2661_vap_create(struct ieee80211com *, 86 const char [IFNAMSIZ], int, enum ieee80211_opmode, 87 int, const uint8_t [IEEE80211_ADDR_LEN], 88 const uint8_t [IEEE80211_ADDR_LEN]); 89 static void rt2661_vap_delete(struct ieee80211vap *); 90 static void rt2661_dma_map_addr(void *, bus_dma_segment_t *, int, 91 int); 92 static int rt2661_alloc_tx_ring(struct rt2661_softc *, 93 struct rt2661_tx_ring *, int); 94 static void rt2661_reset_tx_ring(struct rt2661_softc *, 95 struct rt2661_tx_ring *); 96 static void rt2661_free_tx_ring(struct rt2661_softc *, 97 struct rt2661_tx_ring *); 98 static int rt2661_alloc_rx_ring(struct rt2661_softc *, 99 struct rt2661_rx_ring *, int); 100 static void rt2661_reset_rx_ring(struct rt2661_softc *, 101 struct rt2661_rx_ring *); 102 static void rt2661_free_rx_ring(struct rt2661_softc *, 103 struct rt2661_rx_ring *); 104 static int rt2661_newstate(struct ieee80211vap *, 105 enum ieee80211_state, int); 106 static uint16_t rt2661_eeprom_read(struct rt2661_softc *, uint8_t); 107 static void rt2661_rx_intr(struct rt2661_softc *); 108 static void rt2661_tx_intr(struct rt2661_softc *); 109 static void rt2661_tx_dma_intr(struct rt2661_softc *, 110 struct rt2661_tx_ring *); 111 static void rt2661_mcu_beacon_expire(struct rt2661_softc *); 112 static void rt2661_mcu_wakeup(struct rt2661_softc *); 113 static void rt2661_mcu_cmd_intr(struct rt2661_softc *); 114 static void rt2661_scan_start(struct ieee80211com *); 115 static void rt2661_scan_end(struct ieee80211com *); 116 static void rt2661_getradiocaps(struct ieee80211com *, int, int *, 117 struct ieee80211_channel[]); 118 static void rt2661_set_channel(struct ieee80211com *); 119 static void rt2661_setup_tx_desc(struct rt2661_softc *, 120 struct rt2661_tx_desc *, uint32_t, uint16_t, int, 121 int, const bus_dma_segment_t *, int, int); 122 static int rt2661_tx_data(struct rt2661_softc *, struct mbuf *, 123 struct ieee80211_node *, int); 124 static int rt2661_tx_mgt(struct rt2661_softc *, struct mbuf *, 125 struct ieee80211_node *); 126 static int rt2661_transmit(struct ieee80211com *, struct mbuf *); 127 static void rt2661_start(struct rt2661_softc *); 128 static int rt2661_raw_xmit(struct ieee80211_node *, struct mbuf *, 129 const struct ieee80211_bpf_params *); 130 static void rt2661_watchdog(void *); 131 static void rt2661_parent(struct ieee80211com *); 132 static void rt2661_bbp_write(struct rt2661_softc *, uint8_t, 133 uint8_t); 134 static uint8_t rt2661_bbp_read(struct rt2661_softc *, uint8_t); 135 static void rt2661_rf_write(struct rt2661_softc *, uint8_t, 136 uint32_t); 137 static int rt2661_tx_cmd(struct rt2661_softc *, uint8_t, 138 uint16_t); 139 static void rt2661_select_antenna(struct rt2661_softc *); 140 static void rt2661_enable_mrr(struct rt2661_softc *); 141 static void rt2661_set_txpreamble(struct rt2661_softc *); 142 static void rt2661_set_basicrates(struct rt2661_softc *, 143 const struct ieee80211_rateset *); 144 static void rt2661_select_band(struct rt2661_softc *, 145 struct ieee80211_channel *); 146 static void rt2661_set_chan(struct rt2661_softc *, 147 struct ieee80211_channel *); 148 static void rt2661_set_bssid(struct rt2661_softc *, 149 const uint8_t *); 150 static void rt2661_set_macaddr(struct rt2661_softc *, 151 const uint8_t *); 152 static void rt2661_update_promisc(struct ieee80211com *); 153 static int rt2661_wme_update(struct ieee80211com *) __unused; 154 static void rt2661_update_slot(struct ieee80211com *); 155 static const char *rt2661_get_rf(int); 156 static void rt2661_read_eeprom(struct rt2661_softc *, 157 uint8_t macaddr[IEEE80211_ADDR_LEN]); 158 static int rt2661_bbp_init(struct rt2661_softc *); 159 static void rt2661_init_locked(struct rt2661_softc *); 160 static void rt2661_init(void *); 161 static void rt2661_stop_locked(struct rt2661_softc *); 162 static void rt2661_stop(void *); 163 static int rt2661_load_microcode(struct rt2661_softc *); 164 #ifdef notyet 165 static void rt2661_rx_tune(struct rt2661_softc *); 166 static void rt2661_radar_start(struct rt2661_softc *); 167 static int rt2661_radar_stop(struct rt2661_softc *); 168 #endif 169 static int rt2661_prepare_beacon(struct rt2661_softc *, 170 struct ieee80211vap *); 171 static void rt2661_enable_tsf_sync(struct rt2661_softc *); 172 static void rt2661_enable_tsf(struct rt2661_softc *); 173 static int rt2661_get_rssi(struct rt2661_softc *, uint8_t); 174 175 static const struct { 176 uint32_t reg; 177 uint32_t val; 178 } rt2661_def_mac[] = { 179 RT2661_DEF_MAC 180 }; 181 182 static const struct { 183 uint8_t reg; 184 uint8_t val; 185 } rt2661_def_bbp[] = { 186 RT2661_DEF_BBP 187 }; 188 189 static const struct rfprog { 190 uint8_t chan; 191 uint32_t r1, r2, r3, r4; 192 } rt2661_rf5225_1[] = { 193 RT2661_RF5225_1 194 }, rt2661_rf5225_2[] = { 195 RT2661_RF5225_2 196 }; 197 198 static const uint8_t rt2661_chan_2ghz[] = 199 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 }; 200 static const uint8_t rt2661_chan_5ghz[] = 201 { 36, 40, 44, 48, 52, 56, 60, 64, 202 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 203 149, 153, 157, 161, 165 }; 204 205 int 206 rt2661_attach(device_t dev, int id) 207 { 208 struct rt2661_softc *sc = device_get_softc(dev); 209 struct ieee80211com *ic = &sc->sc_ic; 210 uint32_t val; 211 int error, ac, ntries; 212 213 sc->sc_id = id; 214 sc->sc_dev = dev; 215 216 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 217 MTX_DEF | MTX_RECURSE); 218 219 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 220 mbufq_init(&sc->sc_snd, ifqmaxlen); 221 222 /* wait for NIC to initialize */ 223 for (ntries = 0; ntries < 1000; ntries++) { 224 if ((val = RAL_READ(sc, RT2661_MAC_CSR0)) != 0) 225 break; 226 DELAY(1000); 227 } 228 if (ntries == 1000) { 229 device_printf(sc->sc_dev, 230 "timeout waiting for NIC to initialize\n"); 231 error = EIO; 232 goto fail1; 233 } 234 235 /* retrieve RF rev. no and various other things from EEPROM */ 236 rt2661_read_eeprom(sc, ic->ic_macaddr); 237 238 device_printf(dev, "MAC/BBP RT%X, RF %s\n", val, 239 rt2661_get_rf(sc->rf_rev)); 240 241 /* 242 * Allocate Tx and Rx rings. 243 */ 244 for (ac = 0; ac < 4; ac++) { 245 error = rt2661_alloc_tx_ring(sc, &sc->txq[ac], 246 RT2661_TX_RING_COUNT); 247 if (error != 0) { 248 device_printf(sc->sc_dev, 249 "could not allocate Tx ring %d\n", ac); 250 goto fail2; 251 } 252 } 253 254 error = rt2661_alloc_tx_ring(sc, &sc->mgtq, RT2661_MGT_RING_COUNT); 255 if (error != 0) { 256 device_printf(sc->sc_dev, "could not allocate Mgt ring\n"); 257 goto fail2; 258 } 259 260 error = rt2661_alloc_rx_ring(sc, &sc->rxq, RT2661_RX_RING_COUNT); 261 if (error != 0) { 262 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 263 goto fail3; 264 } 265 266 ic->ic_softc = sc; 267 ic->ic_name = device_get_nameunit(dev); 268 ic->ic_opmode = IEEE80211_M_STA; 269 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 270 271 /* set device capabilities */ 272 ic->ic_caps = 273 IEEE80211_C_STA /* station mode */ 274 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 275 | IEEE80211_C_HOSTAP /* hostap mode */ 276 | IEEE80211_C_MONITOR /* monitor mode */ 277 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 278 | IEEE80211_C_WDS /* 4-address traffic works */ 279 | IEEE80211_C_MBSS /* mesh point link mode */ 280 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 281 | IEEE80211_C_SHSLOT /* short slot time supported */ 282 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 283 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 284 #ifdef notyet 285 | IEEE80211_C_TXFRAG /* handle tx frags */ 286 | IEEE80211_C_WME /* 802.11e */ 287 #endif 288 ; 289 290 rt2661_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans, 291 ic->ic_channels); 292 293 ieee80211_ifattach(ic); 294 #if 0 295 ic->ic_wme.wme_update = rt2661_wme_update; 296 #endif 297 ic->ic_scan_start = rt2661_scan_start; 298 ic->ic_scan_end = rt2661_scan_end; 299 ic->ic_getradiocaps = rt2661_getradiocaps; 300 ic->ic_set_channel = rt2661_set_channel; 301 ic->ic_updateslot = rt2661_update_slot; 302 ic->ic_update_promisc = rt2661_update_promisc; 303 ic->ic_raw_xmit = rt2661_raw_xmit; 304 ic->ic_transmit = rt2661_transmit; 305 ic->ic_parent = rt2661_parent; 306 ic->ic_vap_create = rt2661_vap_create; 307 ic->ic_vap_delete = rt2661_vap_delete; 308 309 ieee80211_radiotap_attach(ic, 310 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 311 RT2661_TX_RADIOTAP_PRESENT, 312 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 313 RT2661_RX_RADIOTAP_PRESENT); 314 315 #ifdef RAL_DEBUG 316 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 317 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 318 "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs"); 319 #endif 320 if (bootverbose) 321 ieee80211_announce(ic); 322 323 return 0; 324 325 fail3: rt2661_free_tx_ring(sc, &sc->mgtq); 326 fail2: while (--ac >= 0) 327 rt2661_free_tx_ring(sc, &sc->txq[ac]); 328 fail1: mtx_destroy(&sc->sc_mtx); 329 return error; 330 } 331 332 int 333 rt2661_detach(void *xsc) 334 { 335 struct rt2661_softc *sc = xsc; 336 struct ieee80211com *ic = &sc->sc_ic; 337 338 RAL_LOCK(sc); 339 rt2661_stop_locked(sc); 340 RAL_UNLOCK(sc); 341 342 ieee80211_ifdetach(ic); 343 mbufq_drain(&sc->sc_snd); 344 345 rt2661_free_tx_ring(sc, &sc->txq[0]); 346 rt2661_free_tx_ring(sc, &sc->txq[1]); 347 rt2661_free_tx_ring(sc, &sc->txq[2]); 348 rt2661_free_tx_ring(sc, &sc->txq[3]); 349 rt2661_free_tx_ring(sc, &sc->mgtq); 350 rt2661_free_rx_ring(sc, &sc->rxq); 351 352 mtx_destroy(&sc->sc_mtx); 353 354 return 0; 355 } 356 357 static struct ieee80211vap * 358 rt2661_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 359 enum ieee80211_opmode opmode, int flags, 360 const uint8_t bssid[IEEE80211_ADDR_LEN], 361 const uint8_t mac[IEEE80211_ADDR_LEN]) 362 { 363 struct rt2661_softc *sc = ic->ic_softc; 364 struct rt2661_vap *rvp; 365 struct ieee80211vap *vap; 366 367 switch (opmode) { 368 case IEEE80211_M_STA: 369 case IEEE80211_M_IBSS: 370 case IEEE80211_M_AHDEMO: 371 case IEEE80211_M_MONITOR: 372 case IEEE80211_M_HOSTAP: 373 case IEEE80211_M_MBSS: 374 /* XXXRP: TBD */ 375 if (!TAILQ_EMPTY(&ic->ic_vaps)) { 376 device_printf(sc->sc_dev, "only 1 vap supported\n"); 377 return NULL; 378 } 379 if (opmode == IEEE80211_M_STA) 380 flags |= IEEE80211_CLONE_NOBEACONS; 381 break; 382 case IEEE80211_M_WDS: 383 if (TAILQ_EMPTY(&ic->ic_vaps) || 384 ic->ic_opmode != IEEE80211_M_HOSTAP) { 385 device_printf(sc->sc_dev, 386 "wds only supported in ap mode\n"); 387 return NULL; 388 } 389 /* 390 * Silently remove any request for a unique 391 * bssid; WDS vap's always share the local 392 * mac address. 393 */ 394 flags &= ~IEEE80211_CLONE_BSSID; 395 break; 396 default: 397 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode); 398 return NULL; 399 } 400 rvp = malloc(sizeof(struct rt2661_vap), M_80211_VAP, M_WAITOK | M_ZERO); 401 vap = &rvp->ral_vap; 402 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid); 403 404 /* override state transition machine */ 405 rvp->ral_newstate = vap->iv_newstate; 406 vap->iv_newstate = rt2661_newstate; 407 #if 0 408 vap->iv_update_beacon = rt2661_beacon_update; 409 #endif 410 411 ieee80211_ratectl_init(vap); 412 /* complete setup */ 413 ieee80211_vap_attach(vap, ieee80211_media_change, 414 ieee80211_media_status, mac); 415 if (TAILQ_FIRST(&ic->ic_vaps) == vap) 416 ic->ic_opmode = opmode; 417 return vap; 418 } 419 420 static void 421 rt2661_vap_delete(struct ieee80211vap *vap) 422 { 423 struct rt2661_vap *rvp = RT2661_VAP(vap); 424 425 ieee80211_ratectl_deinit(vap); 426 ieee80211_vap_detach(vap); 427 free(rvp, M_80211_VAP); 428 } 429 430 void 431 rt2661_shutdown(void *xsc) 432 { 433 struct rt2661_softc *sc = xsc; 434 435 rt2661_stop(sc); 436 } 437 438 void 439 rt2661_suspend(void *xsc) 440 { 441 struct rt2661_softc *sc = xsc; 442 443 rt2661_stop(sc); 444 } 445 446 void 447 rt2661_resume(void *xsc) 448 { 449 struct rt2661_softc *sc = xsc; 450 451 if (sc->sc_ic.ic_nrunning > 0) 452 rt2661_init(sc); 453 } 454 455 static void 456 rt2661_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 457 { 458 if (error != 0) 459 return; 460 461 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 462 463 *(bus_addr_t *)arg = segs[0].ds_addr; 464 } 465 466 static int 467 rt2661_alloc_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring, 468 int count) 469 { 470 int i, error; 471 472 ring->count = count; 473 ring->queued = 0; 474 ring->cur = ring->next = ring->stat = 0; 475 476 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 477 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 478 count * RT2661_TX_DESC_SIZE, 1, count * RT2661_TX_DESC_SIZE, 479 0, NULL, NULL, &ring->desc_dmat); 480 if (error != 0) { 481 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 482 goto fail; 483 } 484 485 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 486 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 487 if (error != 0) { 488 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 489 goto fail; 490 } 491 492 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 493 count * RT2661_TX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 494 0); 495 if (error != 0) { 496 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 497 goto fail; 498 } 499 500 ring->data = malloc(count * sizeof (struct rt2661_tx_data), M_DEVBUF, 501 M_NOWAIT | M_ZERO); 502 if (ring->data == NULL) { 503 device_printf(sc->sc_dev, "could not allocate soft data\n"); 504 error = ENOMEM; 505 goto fail; 506 } 507 508 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 509 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 510 RT2661_MAX_SCATTER, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 511 if (error != 0) { 512 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 513 goto fail; 514 } 515 516 for (i = 0; i < count; i++) { 517 error = bus_dmamap_create(ring->data_dmat, 0, 518 &ring->data[i].map); 519 if (error != 0) { 520 device_printf(sc->sc_dev, "could not create DMA map\n"); 521 goto fail; 522 } 523 } 524 525 return 0; 526 527 fail: rt2661_free_tx_ring(sc, ring); 528 return error; 529 } 530 531 static void 532 rt2661_reset_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 533 { 534 struct rt2661_tx_desc *desc; 535 struct rt2661_tx_data *data; 536 int i; 537 538 for (i = 0; i < ring->count; i++) { 539 desc = &ring->desc[i]; 540 data = &ring->data[i]; 541 542 if (data->m != NULL) { 543 bus_dmamap_sync(ring->data_dmat, data->map, 544 BUS_DMASYNC_POSTWRITE); 545 bus_dmamap_unload(ring->data_dmat, data->map); 546 m_freem(data->m); 547 data->m = NULL; 548 } 549 550 if (data->ni != NULL) { 551 ieee80211_free_node(data->ni); 552 data->ni = NULL; 553 } 554 555 desc->flags = 0; 556 } 557 558 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 559 560 ring->queued = 0; 561 ring->cur = ring->next = ring->stat = 0; 562 } 563 564 static void 565 rt2661_free_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 566 { 567 struct rt2661_tx_data *data; 568 int i; 569 570 if (ring->desc != NULL) { 571 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 572 BUS_DMASYNC_POSTWRITE); 573 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 574 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 575 } 576 577 if (ring->desc_dmat != NULL) 578 bus_dma_tag_destroy(ring->desc_dmat); 579 580 if (ring->data != NULL) { 581 for (i = 0; i < ring->count; i++) { 582 data = &ring->data[i]; 583 584 if (data->m != NULL) { 585 bus_dmamap_sync(ring->data_dmat, data->map, 586 BUS_DMASYNC_POSTWRITE); 587 bus_dmamap_unload(ring->data_dmat, data->map); 588 m_freem(data->m); 589 } 590 591 if (data->ni != NULL) 592 ieee80211_free_node(data->ni); 593 594 if (data->map != NULL) 595 bus_dmamap_destroy(ring->data_dmat, data->map); 596 } 597 598 free(ring->data, M_DEVBUF); 599 } 600 601 if (ring->data_dmat != NULL) 602 bus_dma_tag_destroy(ring->data_dmat); 603 } 604 605 static int 606 rt2661_alloc_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring, 607 int count) 608 { 609 struct rt2661_rx_desc *desc; 610 struct rt2661_rx_data *data; 611 bus_addr_t physaddr; 612 int i, error; 613 614 ring->count = count; 615 ring->cur = ring->next = 0; 616 617 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 618 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 619 count * RT2661_RX_DESC_SIZE, 1, count * RT2661_RX_DESC_SIZE, 620 0, NULL, NULL, &ring->desc_dmat); 621 if (error != 0) { 622 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 623 goto fail; 624 } 625 626 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 627 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 628 if (error != 0) { 629 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 630 goto fail; 631 } 632 633 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 634 count * RT2661_RX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 635 0); 636 if (error != 0) { 637 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 638 goto fail; 639 } 640 641 ring->data = malloc(count * sizeof (struct rt2661_rx_data), M_DEVBUF, 642 M_NOWAIT | M_ZERO); 643 if (ring->data == NULL) { 644 device_printf(sc->sc_dev, "could not allocate soft data\n"); 645 error = ENOMEM; 646 goto fail; 647 } 648 649 /* 650 * Pre-allocate Rx buffers and populate Rx ring. 651 */ 652 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 653 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 654 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 655 if (error != 0) { 656 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 657 goto fail; 658 } 659 660 for (i = 0; i < count; i++) { 661 desc = &sc->rxq.desc[i]; 662 data = &sc->rxq.data[i]; 663 664 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 665 if (error != 0) { 666 device_printf(sc->sc_dev, "could not create DMA map\n"); 667 goto fail; 668 } 669 670 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 671 if (data->m == NULL) { 672 device_printf(sc->sc_dev, 673 "could not allocate rx mbuf\n"); 674 error = ENOMEM; 675 goto fail; 676 } 677 678 error = bus_dmamap_load(ring->data_dmat, data->map, 679 mtod(data->m, void *), MCLBYTES, rt2661_dma_map_addr, 680 &physaddr, 0); 681 if (error != 0) { 682 device_printf(sc->sc_dev, 683 "could not load rx buf DMA map"); 684 goto fail; 685 } 686 687 desc->flags = htole32(RT2661_RX_BUSY); 688 desc->physaddr = htole32(physaddr); 689 } 690 691 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 692 693 return 0; 694 695 fail: rt2661_free_rx_ring(sc, ring); 696 return error; 697 } 698 699 static void 700 rt2661_reset_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 701 { 702 int i; 703 704 for (i = 0; i < ring->count; i++) 705 ring->desc[i].flags = htole32(RT2661_RX_BUSY); 706 707 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 708 709 ring->cur = ring->next = 0; 710 } 711 712 static void 713 rt2661_free_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 714 { 715 struct rt2661_rx_data *data; 716 int i; 717 718 if (ring->desc != NULL) { 719 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 720 BUS_DMASYNC_POSTWRITE); 721 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 722 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 723 } 724 725 if (ring->desc_dmat != NULL) 726 bus_dma_tag_destroy(ring->desc_dmat); 727 728 if (ring->data != NULL) { 729 for (i = 0; i < ring->count; i++) { 730 data = &ring->data[i]; 731 732 if (data->m != NULL) { 733 bus_dmamap_sync(ring->data_dmat, data->map, 734 BUS_DMASYNC_POSTREAD); 735 bus_dmamap_unload(ring->data_dmat, data->map); 736 m_freem(data->m); 737 } 738 739 if (data->map != NULL) 740 bus_dmamap_destroy(ring->data_dmat, data->map); 741 } 742 743 free(ring->data, M_DEVBUF); 744 } 745 746 if (ring->data_dmat != NULL) 747 bus_dma_tag_destroy(ring->data_dmat); 748 } 749 750 static int 751 rt2661_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 752 { 753 struct rt2661_vap *rvp = RT2661_VAP(vap); 754 struct ieee80211com *ic = vap->iv_ic; 755 struct rt2661_softc *sc = ic->ic_softc; 756 int error; 757 758 if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) { 759 uint32_t tmp; 760 761 /* abort TSF synchronization */ 762 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 763 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0x00ffffff); 764 } 765 766 error = rvp->ral_newstate(vap, nstate, arg); 767 768 if (error == 0 && nstate == IEEE80211_S_RUN) { 769 struct ieee80211_node *ni = vap->iv_bss; 770 771 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 772 rt2661_enable_mrr(sc); 773 rt2661_set_txpreamble(sc); 774 rt2661_set_basicrates(sc, &ni->ni_rates); 775 rt2661_set_bssid(sc, ni->ni_bssid); 776 } 777 778 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 779 vap->iv_opmode == IEEE80211_M_IBSS || 780 vap->iv_opmode == IEEE80211_M_MBSS) { 781 error = rt2661_prepare_beacon(sc, vap); 782 if (error != 0) 783 return error; 784 } 785 if (vap->iv_opmode != IEEE80211_M_MONITOR) 786 rt2661_enable_tsf_sync(sc); 787 else 788 rt2661_enable_tsf(sc); 789 } 790 return error; 791 } 792 793 /* 794 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 795 * 93C66). 796 */ 797 static uint16_t 798 rt2661_eeprom_read(struct rt2661_softc *sc, uint8_t addr) 799 { 800 uint32_t tmp; 801 uint16_t val; 802 int n; 803 804 /* clock C once before the first command */ 805 RT2661_EEPROM_CTL(sc, 0); 806 807 RT2661_EEPROM_CTL(sc, RT2661_S); 808 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 809 RT2661_EEPROM_CTL(sc, RT2661_S); 810 811 /* write start bit (1) */ 812 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 813 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 814 815 /* write READ opcode (10) */ 816 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 817 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 818 RT2661_EEPROM_CTL(sc, RT2661_S); 819 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 820 821 /* write address (A5-A0 or A7-A0) */ 822 n = (RAL_READ(sc, RT2661_E2PROM_CSR) & RT2661_93C46) ? 5 : 7; 823 for (; n >= 0; n--) { 824 RT2661_EEPROM_CTL(sc, RT2661_S | 825 (((addr >> n) & 1) << RT2661_SHIFT_D)); 826 RT2661_EEPROM_CTL(sc, RT2661_S | 827 (((addr >> n) & 1) << RT2661_SHIFT_D) | RT2661_C); 828 } 829 830 RT2661_EEPROM_CTL(sc, RT2661_S); 831 832 /* read data Q15-Q0 */ 833 val = 0; 834 for (n = 15; n >= 0; n--) { 835 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 836 tmp = RAL_READ(sc, RT2661_E2PROM_CSR); 837 val |= ((tmp & RT2661_Q) >> RT2661_SHIFT_Q) << n; 838 RT2661_EEPROM_CTL(sc, RT2661_S); 839 } 840 841 RT2661_EEPROM_CTL(sc, 0); 842 843 /* clear Chip Select and clock C */ 844 RT2661_EEPROM_CTL(sc, RT2661_S); 845 RT2661_EEPROM_CTL(sc, 0); 846 RT2661_EEPROM_CTL(sc, RT2661_C); 847 848 return val; 849 } 850 851 static void 852 rt2661_tx_intr(struct rt2661_softc *sc) 853 { 854 struct ieee80211_ratectl_tx_status *txs = &sc->sc_txs; 855 struct rt2661_tx_ring *txq; 856 struct rt2661_tx_data *data; 857 uint32_t val; 858 int error, qid; 859 860 txs->flags = IEEE80211_RATECTL_TX_FAIL_LONG; 861 for (;;) { 862 struct ieee80211_node *ni; 863 struct mbuf *m; 864 865 val = RAL_READ(sc, RT2661_STA_CSR4); 866 if (!(val & RT2661_TX_STAT_VALID)) 867 break; 868 869 /* retrieve the queue in which this frame was sent */ 870 qid = RT2661_TX_QID(val); 871 txq = (qid <= 3) ? &sc->txq[qid] : &sc->mgtq; 872 873 /* retrieve rate control algorithm context */ 874 data = &txq->data[txq->stat]; 875 m = data->m; 876 data->m = NULL; 877 ni = data->ni; 878 data->ni = NULL; 879 880 /* if no frame has been sent, ignore */ 881 if (ni == NULL) 882 continue; 883 884 switch (RT2661_TX_RESULT(val)) { 885 case RT2661_TX_SUCCESS: 886 txs->status = IEEE80211_RATECTL_TX_SUCCESS; 887 txs->long_retries = RT2661_TX_RETRYCNT(val); 888 889 DPRINTFN(sc, 10, "data frame sent successfully after " 890 "%d retries\n", txs->long_retries); 891 if (data->rix != IEEE80211_FIXED_RATE_NONE) 892 ieee80211_ratectl_tx_complete(ni, txs); 893 error = 0; 894 break; 895 896 case RT2661_TX_RETRY_FAIL: 897 txs->status = IEEE80211_RATECTL_TX_FAIL_LONG; 898 txs->long_retries = RT2661_TX_RETRYCNT(val); 899 900 DPRINTFN(sc, 9, "%s\n", 901 "sending data frame failed (too much retries)"); 902 if (data->rix != IEEE80211_FIXED_RATE_NONE) 903 ieee80211_ratectl_tx_complete(ni, txs); 904 error = 1; 905 break; 906 907 default: 908 /* other failure */ 909 device_printf(sc->sc_dev, 910 "sending data frame failed 0x%08x\n", val); 911 error = 1; 912 } 913 914 DPRINTFN(sc, 15, "tx done q=%d idx=%u\n", qid, txq->stat); 915 916 txq->queued--; 917 if (++txq->stat >= txq->count) /* faster than % count */ 918 txq->stat = 0; 919 920 ieee80211_tx_complete(ni, m, error); 921 } 922 923 sc->sc_tx_timer = 0; 924 925 rt2661_start(sc); 926 } 927 928 static void 929 rt2661_tx_dma_intr(struct rt2661_softc *sc, struct rt2661_tx_ring *txq) 930 { 931 struct rt2661_tx_desc *desc; 932 struct rt2661_tx_data *data; 933 934 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_POSTREAD); 935 936 for (;;) { 937 desc = &txq->desc[txq->next]; 938 data = &txq->data[txq->next]; 939 940 if ((le32toh(desc->flags) & RT2661_TX_BUSY) || 941 !(le32toh(desc->flags) & RT2661_TX_VALID)) 942 break; 943 944 bus_dmamap_sync(txq->data_dmat, data->map, 945 BUS_DMASYNC_POSTWRITE); 946 bus_dmamap_unload(txq->data_dmat, data->map); 947 948 /* descriptor is no longer valid */ 949 desc->flags &= ~htole32(RT2661_TX_VALID); 950 951 DPRINTFN(sc, 15, "tx dma done q=%p idx=%u\n", txq, txq->next); 952 953 if (++txq->next >= txq->count) /* faster than % count */ 954 txq->next = 0; 955 } 956 957 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 958 } 959 960 static void 961 rt2661_rx_intr(struct rt2661_softc *sc) 962 { 963 struct ieee80211com *ic = &sc->sc_ic; 964 struct rt2661_rx_desc *desc; 965 struct rt2661_rx_data *data; 966 bus_addr_t physaddr; 967 struct ieee80211_frame *wh; 968 struct ieee80211_node *ni; 969 struct mbuf *mnew, *m; 970 int error; 971 972 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 973 BUS_DMASYNC_POSTREAD); 974 975 for (;;) { 976 int8_t rssi, nf; 977 978 desc = &sc->rxq.desc[sc->rxq.cur]; 979 data = &sc->rxq.data[sc->rxq.cur]; 980 981 if (le32toh(desc->flags) & RT2661_RX_BUSY) 982 break; 983 984 if ((le32toh(desc->flags) & RT2661_RX_PHY_ERROR) || 985 (le32toh(desc->flags) & RT2661_RX_CRC_ERROR)) { 986 /* 987 * This should not happen since we did not request 988 * to receive those frames when we filled TXRX_CSR0. 989 */ 990 DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n", 991 le32toh(desc->flags)); 992 counter_u64_add(ic->ic_ierrors, 1); 993 goto skip; 994 } 995 996 if ((le32toh(desc->flags) & RT2661_RX_CIPHER_MASK) != 0) { 997 counter_u64_add(ic->ic_ierrors, 1); 998 goto skip; 999 } 1000 1001 /* 1002 * Try to allocate a new mbuf for this ring element and load it 1003 * before processing the current mbuf. If the ring element 1004 * cannot be loaded, drop the received packet and reuse the old 1005 * mbuf. In the unlikely case that the old mbuf can't be 1006 * reloaded either, explicitly panic. 1007 */ 1008 mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1009 if (mnew == NULL) { 1010 counter_u64_add(ic->ic_ierrors, 1); 1011 goto skip; 1012 } 1013 1014 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1015 BUS_DMASYNC_POSTREAD); 1016 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1017 1018 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1019 mtod(mnew, void *), MCLBYTES, rt2661_dma_map_addr, 1020 &physaddr, 0); 1021 if (error != 0) { 1022 m_freem(mnew); 1023 1024 /* try to reload the old mbuf */ 1025 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1026 mtod(data->m, void *), MCLBYTES, 1027 rt2661_dma_map_addr, &physaddr, 0); 1028 if (error != 0) { 1029 /* very unlikely that it will fail... */ 1030 panic("%s: could not load old rx mbuf", 1031 device_get_name(sc->sc_dev)); 1032 } 1033 counter_u64_add(ic->ic_ierrors, 1); 1034 goto skip; 1035 } 1036 1037 /* 1038 * New mbuf successfully loaded, update Rx ring and continue 1039 * processing. 1040 */ 1041 m = data->m; 1042 data->m = mnew; 1043 desc->physaddr = htole32(physaddr); 1044 1045 /* finalize mbuf */ 1046 m->m_pkthdr.len = m->m_len = 1047 (le32toh(desc->flags) >> 16) & 0xfff; 1048 1049 rssi = rt2661_get_rssi(sc, desc->rssi); 1050 /* Error happened during RSSI conversion. */ 1051 if (rssi < 0) 1052 rssi = -30; /* XXX ignored by net80211 */ 1053 nf = RT2661_NOISE_FLOOR; 1054 1055 if (ieee80211_radiotap_active(ic)) { 1056 struct rt2661_rx_radiotap_header *tap = &sc->sc_rxtap; 1057 uint32_t tsf_lo, tsf_hi; 1058 1059 /* get timestamp (low and high 32 bits) */ 1060 tsf_hi = RAL_READ(sc, RT2661_TXRX_CSR13); 1061 tsf_lo = RAL_READ(sc, RT2661_TXRX_CSR12); 1062 1063 tap->wr_tsf = 1064 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1065 tap->wr_flags = 0; 1066 tap->wr_rate = ieee80211_plcp2rate(desc->rate, 1067 (desc->flags & htole32(RT2661_RX_OFDM)) ? 1068 IEEE80211_T_OFDM : IEEE80211_T_CCK); 1069 tap->wr_antsignal = nf + rssi; 1070 tap->wr_antnoise = nf; 1071 } 1072 sc->sc_flags |= RAL_INPUT_RUNNING; 1073 RAL_UNLOCK(sc); 1074 wh = mtod(m, struct ieee80211_frame *); 1075 1076 /* send the frame to the 802.11 layer */ 1077 ni = ieee80211_find_rxnode(ic, 1078 (struct ieee80211_frame_min *)wh); 1079 if (ni != NULL) { 1080 (void) ieee80211_input(ni, m, rssi, nf); 1081 ieee80211_free_node(ni); 1082 } else 1083 (void) ieee80211_input_all(ic, m, rssi, nf); 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 const struct ieee80211_frame *wh; 1365 struct rt2661_tx_desc *desc; 1366 struct rt2661_tx_data *data; 1367 struct mbuf *mprot; 1368 int protrate, ackrate, pktlen, flags, isshort, error; 1369 uint16_t dur; 1370 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1371 int nsegs; 1372 1373 KASSERT(prot == IEEE80211_PROT_RTSCTS || prot == IEEE80211_PROT_CTSONLY, 1374 ("protection %d", prot)); 1375 1376 wh = mtod(m, const struct ieee80211_frame *); 1377 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN; 1378 1379 protrate = ieee80211_ctl_rate(ic->ic_rt, rate); 1380 ackrate = ieee80211_ack_rate(ic->ic_rt, rate); 1381 1382 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0; 1383 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort) 1384 + ieee80211_ack_duration(ic->ic_rt, rate, isshort); 1385 flags = RT2661_TX_MORE_FRAG; 1386 if (prot == IEEE80211_PROT_RTSCTS) { 1387 /* NB: CTS is the same size as an ACK */ 1388 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort); 1389 flags |= RT2661_TX_NEED_ACK; 1390 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur); 1391 } else { 1392 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur); 1393 } 1394 if (mprot == NULL) { 1395 /* XXX stat + msg */ 1396 return ENOBUFS; 1397 } 1398 1399 data = &txq->data[txq->cur]; 1400 desc = &txq->desc[txq->cur]; 1401 1402 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, mprot, segs, 1403 &nsegs, 0); 1404 if (error != 0) { 1405 device_printf(sc->sc_dev, 1406 "could not map mbuf (error %d)\n", error); 1407 m_freem(mprot); 1408 return error; 1409 } 1410 1411 data->m = mprot; 1412 data->ni = ieee80211_ref_node(ni); 1413 /* ctl frames are not taken into account for amrr */ 1414 data->rix = IEEE80211_FIXED_RATE_NONE; 1415 1416 rt2661_setup_tx_desc(sc, desc, flags, 0, mprot->m_pkthdr.len, 1417 protrate, segs, 1, ac); 1418 1419 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1420 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1421 1422 txq->queued++; 1423 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1424 1425 return 0; 1426 } 1427 1428 static int 1429 rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0, 1430 struct ieee80211_node *ni, int ac) 1431 { 1432 struct ieee80211vap *vap = ni->ni_vap; 1433 struct ieee80211com *ic = &sc->sc_ic; 1434 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1435 struct rt2661_tx_desc *desc; 1436 struct rt2661_tx_data *data; 1437 struct ieee80211_frame *wh; 1438 const struct ieee80211_txparam *tp = ni->ni_txparms; 1439 struct ieee80211_key *k; 1440 const struct chanAccParams *cap; 1441 struct mbuf *mnew; 1442 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1443 uint16_t dur; 1444 uint32_t flags; 1445 int error, nsegs, rate, noack = 0; 1446 1447 wh = mtod(m0, struct ieee80211_frame *); 1448 1449 if (m0->m_flags & M_EAPOL) { 1450 rate = tp->mgmtrate; 1451 } else if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1452 rate = tp->mcastrate; 1453 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1454 rate = tp->ucastrate; 1455 } else { 1456 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1457 rate = ni->ni_txrate; 1458 } 1459 rate &= IEEE80211_RATE_VAL; 1460 1461 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) { 1462 cap = &ic->ic_wme.wme_chanParams; 1463 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1464 } 1465 1466 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1467 k = ieee80211_crypto_encap(ni, m0); 1468 if (k == NULL) { 1469 m_freem(m0); 1470 return ENOBUFS; 1471 } 1472 1473 /* packet header may have moved, reset our local pointer */ 1474 wh = mtod(m0, struct ieee80211_frame *); 1475 } 1476 1477 flags = 0; 1478 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1479 int prot = IEEE80211_PROT_NONE; 1480 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) 1481 prot = IEEE80211_PROT_RTSCTS; 1482 else if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1483 ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) 1484 prot = ic->ic_protmode; 1485 if (prot != IEEE80211_PROT_NONE) { 1486 error = rt2661_sendprot(sc, ac, m0, ni, prot, rate); 1487 if (error) { 1488 m_freem(m0); 1489 return error; 1490 } 1491 flags |= RT2661_TX_LONG_RETRY | RT2661_TX_IFS; 1492 } 1493 } 1494 1495 data = &txq->data[txq->cur]; 1496 desc = &txq->desc[txq->cur]; 1497 1498 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs, 1499 &nsegs, 0); 1500 if (error != 0 && error != EFBIG) { 1501 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1502 error); 1503 m_freem(m0); 1504 return error; 1505 } 1506 if (error != 0) { 1507 mnew = m_defrag(m0, M_NOWAIT); 1508 if (mnew == NULL) { 1509 device_printf(sc->sc_dev, 1510 "could not defragment mbuf\n"); 1511 m_freem(m0); 1512 return ENOBUFS; 1513 } 1514 m0 = mnew; 1515 1516 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, 1517 segs, &nsegs, 0); 1518 if (error != 0) { 1519 device_printf(sc->sc_dev, 1520 "could not map mbuf (error %d)\n", error); 1521 m_freem(m0); 1522 return error; 1523 } 1524 1525 /* packet header have moved, reset our local pointer */ 1526 wh = mtod(m0, struct ieee80211_frame *); 1527 } 1528 1529 if (ieee80211_radiotap_active_vap(vap)) { 1530 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1531 1532 tap->wt_flags = 0; 1533 tap->wt_rate = rate; 1534 1535 ieee80211_radiotap_tx(vap, m0); 1536 } 1537 1538 data->m = m0; 1539 data->ni = ni; 1540 1541 /* remember link conditions for rate adaptation algorithm */ 1542 if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) { 1543 data->rix = ni->ni_txrate; 1544 /* XXX probably need last rssi value and not avg */ 1545 data->rssi = ic->ic_node_getrssi(ni); 1546 } else 1547 data->rix = IEEE80211_FIXED_RATE_NONE; 1548 1549 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1550 flags |= RT2661_TX_NEED_ACK; 1551 1552 dur = ieee80211_ack_duration(ic->ic_rt, 1553 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1554 *(uint16_t *)wh->i_dur = htole16(dur); 1555 } 1556 1557 rt2661_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate, segs, 1558 nsegs, ac); 1559 1560 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1561 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1562 1563 DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n", 1564 m0->m_pkthdr.len, txq->cur, rate); 1565 1566 /* kick Tx */ 1567 txq->queued++; 1568 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1569 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 1 << ac); 1570 1571 return 0; 1572 } 1573 1574 static int 1575 rt2661_transmit(struct ieee80211com *ic, struct mbuf *m) 1576 { 1577 struct rt2661_softc *sc = ic->ic_softc; 1578 int error; 1579 1580 RAL_LOCK(sc); 1581 if ((sc->sc_flags & RAL_RUNNING) == 0) { 1582 RAL_UNLOCK(sc); 1583 return (ENXIO); 1584 } 1585 error = mbufq_enqueue(&sc->sc_snd, m); 1586 if (error) { 1587 RAL_UNLOCK(sc); 1588 return (error); 1589 } 1590 rt2661_start(sc); 1591 RAL_UNLOCK(sc); 1592 1593 return (0); 1594 } 1595 1596 static void 1597 rt2661_start(struct rt2661_softc *sc) 1598 { 1599 struct mbuf *m; 1600 struct ieee80211_node *ni; 1601 int ac; 1602 1603 RAL_LOCK_ASSERT(sc); 1604 1605 /* prevent management frames from being sent if we're not ready */ 1606 if (!(sc->sc_flags & RAL_RUNNING) || sc->sc_invalid) 1607 return; 1608 1609 while ((m = mbufq_dequeue(&sc->sc_snd)) != NULL) { 1610 ac = M_WME_GETAC(m); 1611 if (sc->txq[ac].queued >= RT2661_TX_RING_COUNT - 1) { 1612 /* there is no place left in this ring */ 1613 mbufq_prepend(&sc->sc_snd, m); 1614 break; 1615 } 1616 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1617 if (rt2661_tx_data(sc, m, ni, ac) != 0) { 1618 if_inc_counter(ni->ni_vap->iv_ifp, 1619 IFCOUNTER_OERRORS, 1); 1620 ieee80211_free_node(ni); 1621 break; 1622 } 1623 sc->sc_tx_timer = 5; 1624 } 1625 } 1626 1627 static int 1628 rt2661_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1629 const struct ieee80211_bpf_params *params) 1630 { 1631 struct ieee80211com *ic = ni->ni_ic; 1632 struct rt2661_softc *sc = ic->ic_softc; 1633 1634 RAL_LOCK(sc); 1635 1636 /* prevent management frames from being sent if we're not ready */ 1637 if (!(sc->sc_flags & RAL_RUNNING)) { 1638 RAL_UNLOCK(sc); 1639 m_freem(m); 1640 return ENETDOWN; 1641 } 1642 if (sc->mgtq.queued >= RT2661_MGT_RING_COUNT) { 1643 RAL_UNLOCK(sc); 1644 m_freem(m); 1645 return ENOBUFS; /* XXX */ 1646 } 1647 1648 /* 1649 * Legacy path; interpret frame contents to decide 1650 * precisely how to send the frame. 1651 * XXX raw path 1652 */ 1653 if (rt2661_tx_mgt(sc, m, ni) != 0) 1654 goto bad; 1655 sc->sc_tx_timer = 5; 1656 1657 RAL_UNLOCK(sc); 1658 1659 return 0; 1660 bad: 1661 RAL_UNLOCK(sc); 1662 return EIO; /* XXX */ 1663 } 1664 1665 static void 1666 rt2661_watchdog(void *arg) 1667 { 1668 struct rt2661_softc *sc = (struct rt2661_softc *)arg; 1669 1670 RAL_LOCK_ASSERT(sc); 1671 1672 KASSERT(sc->sc_flags & RAL_RUNNING, ("not running")); 1673 1674 if (sc->sc_invalid) /* card ejected */ 1675 return; 1676 1677 if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) { 1678 device_printf(sc->sc_dev, "device timeout\n"); 1679 rt2661_init_locked(sc); 1680 counter_u64_add(sc->sc_ic.ic_oerrors, 1); 1681 /* NB: callout is reset in rt2661_init() */ 1682 return; 1683 } 1684 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 1685 } 1686 1687 static void 1688 rt2661_parent(struct ieee80211com *ic) 1689 { 1690 struct rt2661_softc *sc = ic->ic_softc; 1691 int startall = 0; 1692 1693 RAL_LOCK(sc); 1694 if (ic->ic_nrunning > 0) { 1695 if ((sc->sc_flags & RAL_RUNNING) == 0) { 1696 rt2661_init_locked(sc); 1697 startall = 1; 1698 } else 1699 rt2661_update_promisc(ic); 1700 } else if (sc->sc_flags & RAL_RUNNING) 1701 rt2661_stop_locked(sc); 1702 RAL_UNLOCK(sc); 1703 if (startall) 1704 ieee80211_start_all(ic); 1705 } 1706 1707 static void 1708 rt2661_bbp_write(struct rt2661_softc *sc, uint8_t reg, uint8_t val) 1709 { 1710 uint32_t tmp; 1711 int ntries; 1712 1713 for (ntries = 0; ntries < 100; ntries++) { 1714 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1715 break; 1716 DELAY(1); 1717 } 1718 if (ntries == 100) { 1719 device_printf(sc->sc_dev, "could not write to BBP\n"); 1720 return; 1721 } 1722 1723 tmp = RT2661_BBP_BUSY | (reg & 0x7f) << 8 | val; 1724 RAL_WRITE(sc, RT2661_PHY_CSR3, tmp); 1725 1726 DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val); 1727 } 1728 1729 static uint8_t 1730 rt2661_bbp_read(struct rt2661_softc *sc, uint8_t reg) 1731 { 1732 uint32_t val; 1733 int ntries; 1734 1735 for (ntries = 0; ntries < 100; ntries++) { 1736 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1737 break; 1738 DELAY(1); 1739 } 1740 if (ntries == 100) { 1741 device_printf(sc->sc_dev, "could not read from BBP\n"); 1742 return 0; 1743 } 1744 1745 val = RT2661_BBP_BUSY | RT2661_BBP_READ | reg << 8; 1746 RAL_WRITE(sc, RT2661_PHY_CSR3, val); 1747 1748 for (ntries = 0; ntries < 100; ntries++) { 1749 val = RAL_READ(sc, RT2661_PHY_CSR3); 1750 if (!(val & RT2661_BBP_BUSY)) 1751 return val & 0xff; 1752 DELAY(1); 1753 } 1754 1755 device_printf(sc->sc_dev, "could not read from BBP\n"); 1756 return 0; 1757 } 1758 1759 static void 1760 rt2661_rf_write(struct rt2661_softc *sc, uint8_t reg, uint32_t val) 1761 { 1762 uint32_t tmp; 1763 int ntries; 1764 1765 for (ntries = 0; ntries < 100; ntries++) { 1766 if (!(RAL_READ(sc, RT2661_PHY_CSR4) & RT2661_RF_BUSY)) 1767 break; 1768 DELAY(1); 1769 } 1770 if (ntries == 100) { 1771 device_printf(sc->sc_dev, "could not write to RF\n"); 1772 return; 1773 } 1774 1775 tmp = RT2661_RF_BUSY | RT2661_RF_21BIT | (val & 0x1fffff) << 2 | 1776 (reg & 3); 1777 RAL_WRITE(sc, RT2661_PHY_CSR4, tmp); 1778 1779 /* remember last written value in sc */ 1780 sc->rf_regs[reg] = val; 1781 1782 DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 3, val & 0x1fffff); 1783 } 1784 1785 static int 1786 rt2661_tx_cmd(struct rt2661_softc *sc, uint8_t cmd, uint16_t arg) 1787 { 1788 if (RAL_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY) 1789 return EIO; /* there is already a command pending */ 1790 1791 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 1792 RT2661_H2M_BUSY | RT2661_TOKEN_NO_INTR << 16 | arg); 1793 1794 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, RT2661_KICK_CMD | cmd); 1795 1796 return 0; 1797 } 1798 1799 static void 1800 rt2661_select_antenna(struct rt2661_softc *sc) 1801 { 1802 uint8_t bbp4, bbp77; 1803 uint32_t tmp; 1804 1805 bbp4 = rt2661_bbp_read(sc, 4); 1806 bbp77 = rt2661_bbp_read(sc, 77); 1807 1808 /* TBD */ 1809 1810 /* make sure Rx is disabled before switching antenna */ 1811 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 1812 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 1813 1814 rt2661_bbp_write(sc, 4, bbp4); 1815 rt2661_bbp_write(sc, 77, bbp77); 1816 1817 /* restore Rx filter */ 1818 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 1819 } 1820 1821 /* 1822 * Enable multi-rate retries for frames sent at OFDM rates. 1823 * In 802.11b/g mode, allow fallback to CCK rates. 1824 */ 1825 static void 1826 rt2661_enable_mrr(struct rt2661_softc *sc) 1827 { 1828 struct ieee80211com *ic = &sc->sc_ic; 1829 uint32_t tmp; 1830 1831 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1832 1833 tmp &= ~RT2661_MRR_CCK_FALLBACK; 1834 if (!IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan)) 1835 tmp |= RT2661_MRR_CCK_FALLBACK; 1836 tmp |= RT2661_MRR_ENABLED; 1837 1838 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1839 } 1840 1841 static void 1842 rt2661_set_txpreamble(struct rt2661_softc *sc) 1843 { 1844 struct ieee80211com *ic = &sc->sc_ic; 1845 uint32_t tmp; 1846 1847 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1848 1849 tmp &= ~RT2661_SHORT_PREAMBLE; 1850 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 1851 tmp |= RT2661_SHORT_PREAMBLE; 1852 1853 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1854 } 1855 1856 static void 1857 rt2661_set_basicrates(struct rt2661_softc *sc, 1858 const struct ieee80211_rateset *rs) 1859 { 1860 struct ieee80211com *ic = &sc->sc_ic; 1861 uint32_t mask = 0; 1862 uint8_t rate; 1863 int i; 1864 1865 for (i = 0; i < rs->rs_nrates; i++) { 1866 rate = rs->rs_rates[i]; 1867 1868 if (!(rate & IEEE80211_RATE_BASIC)) 1869 continue; 1870 1871 mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt, 1872 IEEE80211_RV(rate)); 1873 } 1874 1875 RAL_WRITE(sc, RT2661_TXRX_CSR5, mask); 1876 1877 DPRINTF(sc, "Setting basic rate mask to 0x%x\n", mask); 1878 } 1879 1880 /* 1881 * Reprogram MAC/BBP to switch to a new band. Values taken from the reference 1882 * driver. 1883 */ 1884 static void 1885 rt2661_select_band(struct rt2661_softc *sc, struct ieee80211_channel *c) 1886 { 1887 uint8_t bbp17, bbp35, bbp96, bbp97, bbp98, bbp104; 1888 uint32_t tmp; 1889 1890 /* update all BBP registers that depend on the band */ 1891 bbp17 = 0x20; bbp96 = 0x48; bbp104 = 0x2c; 1892 bbp35 = 0x50; bbp97 = 0x48; bbp98 = 0x48; 1893 if (IEEE80211_IS_CHAN_5GHZ(c)) { 1894 bbp17 += 0x08; bbp96 += 0x10; bbp104 += 0x0c; 1895 bbp35 += 0x10; bbp97 += 0x10; bbp98 += 0x10; 1896 } 1897 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1898 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1899 bbp17 += 0x10; bbp96 += 0x10; bbp104 += 0x10; 1900 } 1901 1902 rt2661_bbp_write(sc, 17, bbp17); 1903 rt2661_bbp_write(sc, 96, bbp96); 1904 rt2661_bbp_write(sc, 104, bbp104); 1905 1906 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1907 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1908 rt2661_bbp_write(sc, 75, 0x80); 1909 rt2661_bbp_write(sc, 86, 0x80); 1910 rt2661_bbp_write(sc, 88, 0x80); 1911 } 1912 1913 rt2661_bbp_write(sc, 35, bbp35); 1914 rt2661_bbp_write(sc, 97, bbp97); 1915 rt2661_bbp_write(sc, 98, bbp98); 1916 1917 tmp = RAL_READ(sc, RT2661_PHY_CSR0); 1918 tmp &= ~(RT2661_PA_PE_2GHZ | RT2661_PA_PE_5GHZ); 1919 if (IEEE80211_IS_CHAN_2GHZ(c)) 1920 tmp |= RT2661_PA_PE_2GHZ; 1921 else 1922 tmp |= RT2661_PA_PE_5GHZ; 1923 RAL_WRITE(sc, RT2661_PHY_CSR0, tmp); 1924 } 1925 1926 static void 1927 rt2661_set_chan(struct rt2661_softc *sc, struct ieee80211_channel *c) 1928 { 1929 struct ieee80211com *ic = &sc->sc_ic; 1930 const struct rfprog *rfprog; 1931 uint8_t bbp3, bbp94 = RT2661_BBPR94_DEFAULT; 1932 int8_t power; 1933 u_int i, chan; 1934 1935 chan = ieee80211_chan2ieee(ic, c); 1936 KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan)); 1937 1938 /* select the appropriate RF settings based on what EEPROM says */ 1939 rfprog = (sc->rfprog == 0) ? rt2661_rf5225_1 : rt2661_rf5225_2; 1940 1941 /* find the settings for this channel (we know it exists) */ 1942 for (i = 0; rfprog[i].chan != chan; i++); 1943 1944 power = sc->txpow[i]; 1945 if (power < 0) { 1946 bbp94 += power; 1947 power = 0; 1948 } else if (power > 31) { 1949 bbp94 += power - 31; 1950 power = 31; 1951 } 1952 1953 /* 1954 * If we are switching from the 2GHz band to the 5GHz band or 1955 * vice-versa, BBP registers need to be reprogrammed. 1956 */ 1957 if (c->ic_flags != sc->sc_curchan->ic_flags) { 1958 rt2661_select_band(sc, c); 1959 rt2661_select_antenna(sc); 1960 } 1961 sc->sc_curchan = c; 1962 1963 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1964 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1965 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 1966 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1967 1968 DELAY(200); 1969 1970 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1971 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1972 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7 | 1); 1973 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1974 1975 DELAY(200); 1976 1977 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1978 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1979 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 1980 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1981 1982 /* enable smart mode for MIMO-capable RFs */ 1983 bbp3 = rt2661_bbp_read(sc, 3); 1984 1985 bbp3 &= ~RT2661_SMART_MODE; 1986 if (sc->rf_rev == RT2661_RF_5325 || sc->rf_rev == RT2661_RF_2529) 1987 bbp3 |= RT2661_SMART_MODE; 1988 1989 rt2661_bbp_write(sc, 3, bbp3); 1990 1991 if (bbp94 != RT2661_BBPR94_DEFAULT) 1992 rt2661_bbp_write(sc, 94, bbp94); 1993 1994 /* 5GHz radio needs a 1ms delay here */ 1995 if (IEEE80211_IS_CHAN_5GHZ(c)) 1996 DELAY(1000); 1997 } 1998 1999 static void 2000 rt2661_set_bssid(struct rt2661_softc *sc, const uint8_t *bssid) 2001 { 2002 uint32_t tmp; 2003 2004 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2005 RAL_WRITE(sc, RT2661_MAC_CSR4, tmp); 2006 2007 tmp = bssid[4] | bssid[5] << 8 | RT2661_ONE_BSSID << 16; 2008 RAL_WRITE(sc, RT2661_MAC_CSR5, tmp); 2009 } 2010 2011 static void 2012 rt2661_set_macaddr(struct rt2661_softc *sc, const uint8_t *addr) 2013 { 2014 uint32_t tmp; 2015 2016 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2017 RAL_WRITE(sc, RT2661_MAC_CSR2, tmp); 2018 2019 tmp = addr[4] | addr[5] << 8; 2020 RAL_WRITE(sc, RT2661_MAC_CSR3, tmp); 2021 } 2022 2023 static void 2024 rt2661_update_promisc(struct ieee80211com *ic) 2025 { 2026 struct rt2661_softc *sc = ic->ic_softc; 2027 uint32_t tmp; 2028 2029 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2030 2031 tmp &= ~RT2661_DROP_NOT_TO_ME; 2032 if (ic->ic_promisc == 0) 2033 tmp |= RT2661_DROP_NOT_TO_ME; 2034 2035 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2036 2037 DPRINTF(sc, "%s promiscuous mode\n", 2038 (ic->ic_promisc > 0) ? "entering" : "leaving"); 2039 } 2040 2041 /* 2042 * Update QoS (802.11e) settings for each h/w Tx ring. 2043 */ 2044 static int 2045 rt2661_wme_update(struct ieee80211com *ic) 2046 { 2047 struct rt2661_softc *sc = ic->ic_softc; 2048 const struct wmeParams *wmep; 2049 2050 wmep = ic->ic_wme.wme_chanParams.cap_wmeParams; 2051 2052 /* XXX: not sure about shifts. */ 2053 /* XXX: the reference driver plays with AC_VI settings too. */ 2054 2055 /* update TxOp */ 2056 RAL_WRITE(sc, RT2661_AC_TXOP_CSR0, 2057 wmep[WME_AC_BE].wmep_txopLimit << 16 | 2058 wmep[WME_AC_BK].wmep_txopLimit); 2059 RAL_WRITE(sc, RT2661_AC_TXOP_CSR1, 2060 wmep[WME_AC_VI].wmep_txopLimit << 16 | 2061 wmep[WME_AC_VO].wmep_txopLimit); 2062 2063 /* update CWmin */ 2064 RAL_WRITE(sc, RT2661_CWMIN_CSR, 2065 wmep[WME_AC_BE].wmep_logcwmin << 12 | 2066 wmep[WME_AC_BK].wmep_logcwmin << 8 | 2067 wmep[WME_AC_VI].wmep_logcwmin << 4 | 2068 wmep[WME_AC_VO].wmep_logcwmin); 2069 2070 /* update CWmax */ 2071 RAL_WRITE(sc, RT2661_CWMAX_CSR, 2072 wmep[WME_AC_BE].wmep_logcwmax << 12 | 2073 wmep[WME_AC_BK].wmep_logcwmax << 8 | 2074 wmep[WME_AC_VI].wmep_logcwmax << 4 | 2075 wmep[WME_AC_VO].wmep_logcwmax); 2076 2077 /* update Aifsn */ 2078 RAL_WRITE(sc, RT2661_AIFSN_CSR, 2079 wmep[WME_AC_BE].wmep_aifsn << 12 | 2080 wmep[WME_AC_BK].wmep_aifsn << 8 | 2081 wmep[WME_AC_VI].wmep_aifsn << 4 | 2082 wmep[WME_AC_VO].wmep_aifsn); 2083 2084 return 0; 2085 } 2086 2087 static void 2088 rt2661_update_slot(struct ieee80211com *ic) 2089 { 2090 struct rt2661_softc *sc = ic->ic_softc; 2091 uint8_t slottime; 2092 uint32_t tmp; 2093 2094 slottime = IEEE80211_GET_SLOTTIME(ic); 2095 2096 tmp = RAL_READ(sc, RT2661_MAC_CSR9); 2097 tmp = (tmp & ~0xff) | slottime; 2098 RAL_WRITE(sc, RT2661_MAC_CSR9, tmp); 2099 } 2100 2101 static const char * 2102 rt2661_get_rf(int rev) 2103 { 2104 switch (rev) { 2105 case RT2661_RF_5225: return "RT5225"; 2106 case RT2661_RF_5325: return "RT5325 (MIMO XR)"; 2107 case RT2661_RF_2527: return "RT2527"; 2108 case RT2661_RF_2529: return "RT2529 (MIMO XR)"; 2109 default: return "unknown"; 2110 } 2111 } 2112 2113 static void 2114 rt2661_read_eeprom(struct rt2661_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2115 { 2116 uint16_t val; 2117 int i; 2118 2119 /* read MAC address */ 2120 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC01); 2121 macaddr[0] = val & 0xff; 2122 macaddr[1] = val >> 8; 2123 2124 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC23); 2125 macaddr[2] = val & 0xff; 2126 macaddr[3] = val >> 8; 2127 2128 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC45); 2129 macaddr[4] = val & 0xff; 2130 macaddr[5] = val >> 8; 2131 2132 val = rt2661_eeprom_read(sc, RT2661_EEPROM_ANTENNA); 2133 /* XXX: test if different from 0xffff? */ 2134 sc->rf_rev = (val >> 11) & 0x1f; 2135 sc->hw_radio = (val >> 10) & 0x1; 2136 sc->rx_ant = (val >> 4) & 0x3; 2137 sc->tx_ant = (val >> 2) & 0x3; 2138 sc->nb_ant = val & 0x3; 2139 2140 DPRINTF(sc, "RF revision=%d\n", sc->rf_rev); 2141 2142 val = rt2661_eeprom_read(sc, RT2661_EEPROM_CONFIG2); 2143 sc->ext_5ghz_lna = (val >> 6) & 0x1; 2144 sc->ext_2ghz_lna = (val >> 4) & 0x1; 2145 2146 DPRINTF(sc, "External 2GHz LNA=%d\nExternal 5GHz LNA=%d\n", 2147 sc->ext_2ghz_lna, sc->ext_5ghz_lna); 2148 2149 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_2GHZ_OFFSET); 2150 if ((val & 0xff) != 0xff) 2151 sc->rssi_2ghz_corr = (int8_t)(val & 0xff); /* signed */ 2152 2153 /* Only [-10, 10] is valid */ 2154 if (sc->rssi_2ghz_corr < -10 || sc->rssi_2ghz_corr > 10) 2155 sc->rssi_2ghz_corr = 0; 2156 2157 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_5GHZ_OFFSET); 2158 if ((val & 0xff) != 0xff) 2159 sc->rssi_5ghz_corr = (int8_t)(val & 0xff); /* signed */ 2160 2161 /* Only [-10, 10] is valid */ 2162 if (sc->rssi_5ghz_corr < -10 || sc->rssi_5ghz_corr > 10) 2163 sc->rssi_5ghz_corr = 0; 2164 2165 /* adjust RSSI correction for external low-noise amplifier */ 2166 if (sc->ext_2ghz_lna) 2167 sc->rssi_2ghz_corr -= 14; 2168 if (sc->ext_5ghz_lna) 2169 sc->rssi_5ghz_corr -= 14; 2170 2171 DPRINTF(sc, "RSSI 2GHz corr=%d\nRSSI 5GHz corr=%d\n", 2172 sc->rssi_2ghz_corr, sc->rssi_5ghz_corr); 2173 2174 val = rt2661_eeprom_read(sc, RT2661_EEPROM_FREQ_OFFSET); 2175 if ((val >> 8) != 0xff) 2176 sc->rfprog = (val >> 8) & 0x3; 2177 if ((val & 0xff) != 0xff) 2178 sc->rffreq = val & 0xff; 2179 2180 DPRINTF(sc, "RF prog=%d\nRF freq=%d\n", sc->rfprog, sc->rffreq); 2181 2182 /* read Tx power for all a/b/g channels */ 2183 for (i = 0; i < 19; i++) { 2184 val = rt2661_eeprom_read(sc, RT2661_EEPROM_TXPOWER + i); 2185 sc->txpow[i * 2] = (int8_t)(val >> 8); /* signed */ 2186 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2187 rt2661_rf5225_1[i * 2].chan, sc->txpow[i * 2]); 2188 sc->txpow[i * 2 + 1] = (int8_t)(val & 0xff); /* signed */ 2189 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2190 rt2661_rf5225_1[i * 2 + 1].chan, sc->txpow[i * 2 + 1]); 2191 } 2192 2193 /* read vendor-specific BBP values */ 2194 for (i = 0; i < 16; i++) { 2195 val = rt2661_eeprom_read(sc, RT2661_EEPROM_BBP_BASE + i); 2196 if (val == 0 || val == 0xffff) 2197 continue; /* skip invalid entries */ 2198 sc->bbp_prom[i].reg = val >> 8; 2199 sc->bbp_prom[i].val = val & 0xff; 2200 DPRINTF(sc, "BBP R%d=%02x\n", sc->bbp_prom[i].reg, 2201 sc->bbp_prom[i].val); 2202 } 2203 } 2204 2205 static int 2206 rt2661_bbp_init(struct rt2661_softc *sc) 2207 { 2208 int i, ntries; 2209 uint8_t val; 2210 2211 /* wait for BBP to be ready */ 2212 for (ntries = 0; ntries < 100; ntries++) { 2213 val = rt2661_bbp_read(sc, 0); 2214 if (val != 0 && val != 0xff) 2215 break; 2216 DELAY(100); 2217 } 2218 if (ntries == 100) { 2219 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2220 return EIO; 2221 } 2222 2223 /* initialize BBP registers to default values */ 2224 for (i = 0; i < nitems(rt2661_def_bbp); i++) { 2225 rt2661_bbp_write(sc, rt2661_def_bbp[i].reg, 2226 rt2661_def_bbp[i].val); 2227 } 2228 2229 /* write vendor-specific BBP values (from EEPROM) */ 2230 for (i = 0; i < 16; i++) { 2231 if (sc->bbp_prom[i].reg == 0) 2232 continue; 2233 rt2661_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2234 } 2235 2236 return 0; 2237 } 2238 2239 static void 2240 rt2661_init_locked(struct rt2661_softc *sc) 2241 { 2242 struct ieee80211com *ic = &sc->sc_ic; 2243 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2244 uint32_t tmp, sta[3]; 2245 int i, error, ntries; 2246 2247 RAL_LOCK_ASSERT(sc); 2248 2249 if ((sc->sc_flags & RAL_FW_LOADED) == 0) { 2250 error = rt2661_load_microcode(sc); 2251 if (error != 0) { 2252 device_printf(sc->sc_dev, 2253 "%s: could not load 8051 microcode, error %d\n", 2254 __func__, error); 2255 return; 2256 } 2257 sc->sc_flags |= RAL_FW_LOADED; 2258 } 2259 2260 rt2661_stop_locked(sc); 2261 2262 /* initialize Tx rings */ 2263 RAL_WRITE(sc, RT2661_AC1_BASE_CSR, sc->txq[1].physaddr); 2264 RAL_WRITE(sc, RT2661_AC0_BASE_CSR, sc->txq[0].physaddr); 2265 RAL_WRITE(sc, RT2661_AC2_BASE_CSR, sc->txq[2].physaddr); 2266 RAL_WRITE(sc, RT2661_AC3_BASE_CSR, sc->txq[3].physaddr); 2267 2268 /* initialize Mgt ring */ 2269 RAL_WRITE(sc, RT2661_MGT_BASE_CSR, sc->mgtq.physaddr); 2270 2271 /* initialize Rx ring */ 2272 RAL_WRITE(sc, RT2661_RX_BASE_CSR, sc->rxq.physaddr); 2273 2274 /* initialize Tx rings sizes */ 2275 RAL_WRITE(sc, RT2661_TX_RING_CSR0, 2276 RT2661_TX_RING_COUNT << 24 | 2277 RT2661_TX_RING_COUNT << 16 | 2278 RT2661_TX_RING_COUNT << 8 | 2279 RT2661_TX_RING_COUNT); 2280 2281 RAL_WRITE(sc, RT2661_TX_RING_CSR1, 2282 RT2661_TX_DESC_WSIZE << 16 | 2283 RT2661_TX_RING_COUNT << 8 | /* XXX: HCCA ring unused */ 2284 RT2661_MGT_RING_COUNT); 2285 2286 /* initialize Rx rings */ 2287 RAL_WRITE(sc, RT2661_RX_RING_CSR, 2288 RT2661_RX_DESC_BACK << 16 | 2289 RT2661_RX_DESC_WSIZE << 8 | 2290 RT2661_RX_RING_COUNT); 2291 2292 /* XXX: some magic here */ 2293 RAL_WRITE(sc, RT2661_TX_DMA_DST_CSR, 0xaa); 2294 2295 /* load base addresses of all 5 Tx rings (4 data + 1 mgt) */ 2296 RAL_WRITE(sc, RT2661_LOAD_TX_RING_CSR, 0x1f); 2297 2298 /* load base address of Rx ring */ 2299 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 2); 2300 2301 /* initialize MAC registers to default values */ 2302 for (i = 0; i < nitems(rt2661_def_mac); i++) 2303 RAL_WRITE(sc, rt2661_def_mac[i].reg, rt2661_def_mac[i].val); 2304 2305 rt2661_set_macaddr(sc, vap ? vap->iv_myaddr : ic->ic_macaddr); 2306 2307 /* set host ready */ 2308 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2309 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2310 2311 /* wait for BBP/RF to wakeup */ 2312 for (ntries = 0; ntries < 1000; ntries++) { 2313 if (RAL_READ(sc, RT2661_MAC_CSR12) & 8) 2314 break; 2315 DELAY(1000); 2316 } 2317 if (ntries == 1000) { 2318 printf("timeout waiting for BBP/RF to wakeup\n"); 2319 rt2661_stop_locked(sc); 2320 return; 2321 } 2322 2323 if (rt2661_bbp_init(sc) != 0) { 2324 rt2661_stop_locked(sc); 2325 return; 2326 } 2327 2328 /* select default channel */ 2329 sc->sc_curchan = ic->ic_curchan; 2330 rt2661_select_band(sc, sc->sc_curchan); 2331 rt2661_select_antenna(sc); 2332 rt2661_set_chan(sc, sc->sc_curchan); 2333 2334 /* update Rx filter */ 2335 tmp = RAL_READ(sc, RT2661_TXRX_CSR0) & 0xffff; 2336 2337 tmp |= RT2661_DROP_PHY_ERROR | RT2661_DROP_CRC_ERROR; 2338 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2339 tmp |= RT2661_DROP_CTL | RT2661_DROP_VER_ERROR | 2340 RT2661_DROP_ACKCTS; 2341 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 2342 ic->ic_opmode != IEEE80211_M_MBSS) 2343 tmp |= RT2661_DROP_TODS; 2344 if (ic->ic_promisc == 0) 2345 tmp |= RT2661_DROP_NOT_TO_ME; 2346 } 2347 2348 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2349 2350 /* clear STA registers */ 2351 RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, nitems(sta)); 2352 2353 /* initialize ASIC */ 2354 RAL_WRITE(sc, RT2661_MAC_CSR1, 4); 2355 2356 /* clear any pending interrupt */ 2357 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2358 2359 /* enable interrupts */ 2360 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 2361 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 2362 2363 /* kick Rx */ 2364 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 1); 2365 2366 sc->sc_flags |= RAL_RUNNING; 2367 2368 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 2369 } 2370 2371 static void 2372 rt2661_init(void *priv) 2373 { 2374 struct rt2661_softc *sc = priv; 2375 struct ieee80211com *ic = &sc->sc_ic; 2376 2377 RAL_LOCK(sc); 2378 rt2661_init_locked(sc); 2379 RAL_UNLOCK(sc); 2380 2381 if (sc->sc_flags & RAL_RUNNING) 2382 ieee80211_start_all(ic); /* start all vap's */ 2383 } 2384 2385 void 2386 rt2661_stop_locked(struct rt2661_softc *sc) 2387 { 2388 volatile int *flags = &sc->sc_flags; 2389 uint32_t tmp; 2390 2391 while (*flags & RAL_INPUT_RUNNING) 2392 msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10); 2393 2394 callout_stop(&sc->watchdog_ch); 2395 sc->sc_tx_timer = 0; 2396 2397 if (sc->sc_flags & RAL_RUNNING) { 2398 sc->sc_flags &= ~RAL_RUNNING; 2399 2400 /* abort Tx (for all 5 Tx rings) */ 2401 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 0x1f << 16); 2402 2403 /* disable Rx (value remains after reset!) */ 2404 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2405 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2406 2407 /* reset ASIC */ 2408 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2409 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2410 2411 /* disable interrupts */ 2412 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffffff); 2413 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 2414 2415 /* clear any pending interrupt */ 2416 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2417 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, 0xffffffff); 2418 2419 /* reset Tx and Rx rings */ 2420 rt2661_reset_tx_ring(sc, &sc->txq[0]); 2421 rt2661_reset_tx_ring(sc, &sc->txq[1]); 2422 rt2661_reset_tx_ring(sc, &sc->txq[2]); 2423 rt2661_reset_tx_ring(sc, &sc->txq[3]); 2424 rt2661_reset_tx_ring(sc, &sc->mgtq); 2425 rt2661_reset_rx_ring(sc, &sc->rxq); 2426 } 2427 } 2428 2429 void 2430 rt2661_stop(void *priv) 2431 { 2432 struct rt2661_softc *sc = priv; 2433 2434 RAL_LOCK(sc); 2435 rt2661_stop_locked(sc); 2436 RAL_UNLOCK(sc); 2437 } 2438 2439 static int 2440 rt2661_load_microcode(struct rt2661_softc *sc) 2441 { 2442 const struct firmware *fp; 2443 const char *imagename; 2444 int ntries, error; 2445 2446 RAL_LOCK_ASSERT(sc); 2447 2448 switch (sc->sc_id) { 2449 case 0x0301: imagename = "rt2561sfw"; break; 2450 case 0x0302: imagename = "rt2561fw"; break; 2451 case 0x0401: imagename = "rt2661fw"; break; 2452 default: 2453 device_printf(sc->sc_dev, "%s: unexpected pci device id 0x%x, " 2454 "don't know how to retrieve firmware\n", 2455 __func__, sc->sc_id); 2456 return EINVAL; 2457 } 2458 RAL_UNLOCK(sc); 2459 fp = firmware_get(imagename); 2460 RAL_LOCK(sc); 2461 if (fp == NULL) { 2462 device_printf(sc->sc_dev, 2463 "%s: unable to retrieve firmware image %s\n", 2464 __func__, imagename); 2465 return EINVAL; 2466 } 2467 2468 /* 2469 * Load 8051 microcode into NIC. 2470 */ 2471 /* reset 8051 */ 2472 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2473 2474 /* cancel any pending Host to MCU command */ 2475 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0); 2476 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 2477 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, 0); 2478 2479 /* write 8051's microcode */ 2480 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET | RT2661_MCU_SEL); 2481 RAL_WRITE_REGION_1(sc, RT2661_MCU_CODE_BASE, fp->data, fp->datasize); 2482 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2483 2484 /* kick 8051's ass */ 2485 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, 0); 2486 2487 /* wait for 8051 to initialize */ 2488 for (ntries = 0; ntries < 500; ntries++) { 2489 if (RAL_READ(sc, RT2661_MCU_CNTL_CSR) & RT2661_MCU_READY) 2490 break; 2491 DELAY(100); 2492 } 2493 if (ntries == 500) { 2494 device_printf(sc->sc_dev, 2495 "%s: timeout waiting for MCU to initialize\n", __func__); 2496 error = EIO; 2497 } else 2498 error = 0; 2499 2500 firmware_put(fp, FIRMWARE_UNLOAD); 2501 return error; 2502 } 2503 2504 #ifdef notyet 2505 /* 2506 * Dynamically tune Rx sensitivity (BBP register 17) based on average RSSI and 2507 * false CCA count. This function is called periodically (every seconds) when 2508 * in the RUN state. Values taken from the reference driver. 2509 */ 2510 static void 2511 rt2661_rx_tune(struct rt2661_softc *sc) 2512 { 2513 uint8_t bbp17; 2514 uint16_t cca; 2515 int lo, hi, dbm; 2516 2517 /* 2518 * Tuning range depends on operating band and on the presence of an 2519 * external low-noise amplifier. 2520 */ 2521 lo = 0x20; 2522 if (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan)) 2523 lo += 0x08; 2524 if ((IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan) && sc->ext_2ghz_lna) || 2525 (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan) && sc->ext_5ghz_lna)) 2526 lo += 0x10; 2527 hi = lo + 0x20; 2528 2529 /* retrieve false CCA count since last call (clear on read) */ 2530 cca = RAL_READ(sc, RT2661_STA_CSR1) & 0xffff; 2531 2532 if (dbm >= -35) { 2533 bbp17 = 0x60; 2534 } else if (dbm >= -58) { 2535 bbp17 = hi; 2536 } else if (dbm >= -66) { 2537 bbp17 = lo + 0x10; 2538 } else if (dbm >= -74) { 2539 bbp17 = lo + 0x08; 2540 } else { 2541 /* RSSI < -74dBm, tune using false CCA count */ 2542 2543 bbp17 = sc->bbp17; /* current value */ 2544 2545 hi -= 2 * (-74 - dbm); 2546 if (hi < lo) 2547 hi = lo; 2548 2549 if (bbp17 > hi) { 2550 bbp17 = hi; 2551 2552 } else if (cca > 512) { 2553 if (++bbp17 > hi) 2554 bbp17 = hi; 2555 } else if (cca < 100) { 2556 if (--bbp17 < lo) 2557 bbp17 = lo; 2558 } 2559 } 2560 2561 if (bbp17 != sc->bbp17) { 2562 rt2661_bbp_write(sc, 17, bbp17); 2563 sc->bbp17 = bbp17; 2564 } 2565 } 2566 2567 /* 2568 * Enter/Leave radar detection mode. 2569 * This is for 802.11h additional regulatory domains. 2570 */ 2571 static void 2572 rt2661_radar_start(struct rt2661_softc *sc) 2573 { 2574 uint32_t tmp; 2575 2576 /* disable Rx */ 2577 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2578 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2579 2580 rt2661_bbp_write(sc, 82, 0x20); 2581 rt2661_bbp_write(sc, 83, 0x00); 2582 rt2661_bbp_write(sc, 84, 0x40); 2583 2584 /* save current BBP registers values */ 2585 sc->bbp18 = rt2661_bbp_read(sc, 18); 2586 sc->bbp21 = rt2661_bbp_read(sc, 21); 2587 sc->bbp22 = rt2661_bbp_read(sc, 22); 2588 sc->bbp16 = rt2661_bbp_read(sc, 16); 2589 sc->bbp17 = rt2661_bbp_read(sc, 17); 2590 sc->bbp64 = rt2661_bbp_read(sc, 64); 2591 2592 rt2661_bbp_write(sc, 18, 0xff); 2593 rt2661_bbp_write(sc, 21, 0x3f); 2594 rt2661_bbp_write(sc, 22, 0x3f); 2595 rt2661_bbp_write(sc, 16, 0xbd); 2596 rt2661_bbp_write(sc, 17, sc->ext_5ghz_lna ? 0x44 : 0x34); 2597 rt2661_bbp_write(sc, 64, 0x21); 2598 2599 /* restore Rx filter */ 2600 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2601 } 2602 2603 static int 2604 rt2661_radar_stop(struct rt2661_softc *sc) 2605 { 2606 uint8_t bbp66; 2607 2608 /* read radar detection result */ 2609 bbp66 = rt2661_bbp_read(sc, 66); 2610 2611 /* restore BBP registers values */ 2612 rt2661_bbp_write(sc, 16, sc->bbp16); 2613 rt2661_bbp_write(sc, 17, sc->bbp17); 2614 rt2661_bbp_write(sc, 18, sc->bbp18); 2615 rt2661_bbp_write(sc, 21, sc->bbp21); 2616 rt2661_bbp_write(sc, 22, sc->bbp22); 2617 rt2661_bbp_write(sc, 64, sc->bbp64); 2618 2619 return bbp66 == 1; 2620 } 2621 #endif 2622 2623 static int 2624 rt2661_prepare_beacon(struct rt2661_softc *sc, struct ieee80211vap *vap) 2625 { 2626 struct ieee80211com *ic = vap->iv_ic; 2627 struct rt2661_tx_desc desc; 2628 struct mbuf *m0; 2629 int rate; 2630 2631 if ((m0 = ieee80211_beacon_alloc(vap->iv_bss))== NULL) { 2632 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2633 return ENOBUFS; 2634 } 2635 2636 /* send beacons at the lowest available rate */ 2637 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan) ? 12 : 2; 2638 2639 rt2661_setup_tx_desc(sc, &desc, RT2661_TX_TIMESTAMP, RT2661_TX_HWSEQ, 2640 m0->m_pkthdr.len, rate, NULL, 0, RT2661_QID_MGT); 2641 2642 /* copy the first 24 bytes of Tx descriptor into NIC memory */ 2643 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0, (uint8_t *)&desc, 24); 2644 2645 /* copy beacon header and payload into NIC memory */ 2646 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0 + 24, 2647 mtod(m0, uint8_t *), m0->m_pkthdr.len); 2648 2649 m_freem(m0); 2650 2651 return 0; 2652 } 2653 2654 /* 2655 * Enable TSF synchronization and tell h/w to start sending beacons for IBSS 2656 * and HostAP operating modes. 2657 */ 2658 static void 2659 rt2661_enable_tsf_sync(struct rt2661_softc *sc) 2660 { 2661 struct ieee80211com *ic = &sc->sc_ic; 2662 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2663 uint32_t tmp; 2664 2665 if (vap->iv_opmode != IEEE80211_M_STA) { 2666 /* 2667 * Change default 16ms TBTT adjustment to 8ms. 2668 * Must be done before enabling beacon generation. 2669 */ 2670 RAL_WRITE(sc, RT2661_TXRX_CSR10, 1 << 12 | 8); 2671 } 2672 2673 tmp = RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000; 2674 2675 /* set beacon interval (in 1/16ms unit) */ 2676 tmp |= vap->iv_bss->ni_intval * 16; 2677 2678 tmp |= RT2661_TSF_TICKING | RT2661_ENABLE_TBTT; 2679 if (vap->iv_opmode == IEEE80211_M_STA) 2680 tmp |= RT2661_TSF_MODE(1); 2681 else 2682 tmp |= RT2661_TSF_MODE(2) | RT2661_GENERATE_BEACON; 2683 2684 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp); 2685 } 2686 2687 static void 2688 rt2661_enable_tsf(struct rt2661_softc *sc) 2689 { 2690 RAL_WRITE(sc, RT2661_TXRX_CSR9, 2691 (RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000) 2692 | RT2661_TSF_TICKING | RT2661_TSF_MODE(2)); 2693 } 2694 2695 /* 2696 * Retrieve the "Received Signal Strength Indicator" from the raw values 2697 * contained in Rx descriptors. The computation depends on which band the 2698 * frame was received. Correction values taken from the reference driver. 2699 */ 2700 static int 2701 rt2661_get_rssi(struct rt2661_softc *sc, uint8_t raw) 2702 { 2703 int lna, agc, rssi; 2704 2705 lna = (raw >> 5) & 0x3; 2706 agc = raw & 0x1f; 2707 2708 if (lna == 0) { 2709 /* 2710 * No mapping available. 2711 * 2712 * NB: Since RSSI is relative to noise floor, -1 is 2713 * adequate for caller to know error happened. 2714 */ 2715 return -1; 2716 } 2717 2718 rssi = (2 * agc) - RT2661_NOISE_FLOOR; 2719 2720 if (IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan)) { 2721 rssi += sc->rssi_2ghz_corr; 2722 2723 if (lna == 1) 2724 rssi -= 64; 2725 else if (lna == 2) 2726 rssi -= 74; 2727 else if (lna == 3) 2728 rssi -= 90; 2729 } else { 2730 rssi += sc->rssi_5ghz_corr; 2731 2732 if (lna == 1) 2733 rssi -= 64; 2734 else if (lna == 2) 2735 rssi -= 86; 2736 else if (lna == 3) 2737 rssi -= 100; 2738 } 2739 return rssi; 2740 } 2741 2742 static void 2743 rt2661_scan_start(struct ieee80211com *ic) 2744 { 2745 struct rt2661_softc *sc = ic->ic_softc; 2746 uint32_t tmp; 2747 2748 /* abort TSF synchronization */ 2749 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 2750 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0xffffff); 2751 rt2661_set_bssid(sc, ieee80211broadcastaddr); 2752 } 2753 2754 static void 2755 rt2661_scan_end(struct ieee80211com *ic) 2756 { 2757 struct rt2661_softc *sc = ic->ic_softc; 2758 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2759 2760 rt2661_enable_tsf_sync(sc); 2761 /* XXX keep local copy */ 2762 rt2661_set_bssid(sc, vap->iv_bss->ni_bssid); 2763 } 2764 2765 static void 2766 rt2661_getradiocaps(struct ieee80211com *ic, 2767 int maxchans, int *nchans, struct ieee80211_channel chans[]) 2768 { 2769 struct rt2661_softc *sc = ic->ic_softc; 2770 uint8_t bands[IEEE80211_MODE_BYTES]; 2771 2772 memset(bands, 0, sizeof(bands)); 2773 setbit(bands, IEEE80211_MODE_11B); 2774 setbit(bands, IEEE80211_MODE_11G); 2775 ieee80211_add_channel_list_2ghz(chans, maxchans, nchans, 2776 rt2661_chan_2ghz, nitems(rt2661_chan_2ghz), bands, 0); 2777 2778 if (sc->rf_rev == RT2661_RF_5225 || sc->rf_rev == RT2661_RF_5325) { 2779 setbit(bands, IEEE80211_MODE_11A); 2780 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans, 2781 rt2661_chan_5ghz, nitems(rt2661_chan_5ghz), bands, 0); 2782 } 2783 } 2784 2785 static void 2786 rt2661_set_channel(struct ieee80211com *ic) 2787 { 2788 struct rt2661_softc *sc = ic->ic_softc; 2789 2790 RAL_LOCK(sc); 2791 rt2661_set_chan(sc, ic->ic_curchan); 2792 RAL_UNLOCK(sc); 2793 2794 } 2795