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_set_channel(struct ieee80211com *); 117 static void rt2661_setup_tx_desc(struct rt2661_softc *, 118 struct rt2661_tx_desc *, uint32_t, uint16_t, int, 119 int, const bus_dma_segment_t *, int, int); 120 static int rt2661_tx_data(struct rt2661_softc *, struct mbuf *, 121 struct ieee80211_node *, int); 122 static int rt2661_tx_mgt(struct rt2661_softc *, struct mbuf *, 123 struct ieee80211_node *); 124 static int rt2661_transmit(struct ieee80211com *, struct mbuf *); 125 static void rt2661_start(struct rt2661_softc *); 126 static int rt2661_raw_xmit(struct ieee80211_node *, struct mbuf *, 127 const struct ieee80211_bpf_params *); 128 static void rt2661_watchdog(void *); 129 static void rt2661_parent(struct ieee80211com *); 130 static void rt2661_bbp_write(struct rt2661_softc *, uint8_t, 131 uint8_t); 132 static uint8_t rt2661_bbp_read(struct rt2661_softc *, uint8_t); 133 static void rt2661_rf_write(struct rt2661_softc *, uint8_t, 134 uint32_t); 135 static int rt2661_tx_cmd(struct rt2661_softc *, uint8_t, 136 uint16_t); 137 static void rt2661_select_antenna(struct rt2661_softc *); 138 static void rt2661_enable_mrr(struct rt2661_softc *); 139 static void rt2661_set_txpreamble(struct rt2661_softc *); 140 static void rt2661_set_basicrates(struct rt2661_softc *, 141 const struct ieee80211_rateset *); 142 static void rt2661_select_band(struct rt2661_softc *, 143 struct ieee80211_channel *); 144 static void rt2661_set_chan(struct rt2661_softc *, 145 struct ieee80211_channel *); 146 static void rt2661_set_bssid(struct rt2661_softc *, 147 const uint8_t *); 148 static void rt2661_set_macaddr(struct rt2661_softc *, 149 const uint8_t *); 150 static void rt2661_update_promisc(struct ieee80211com *); 151 static int rt2661_wme_update(struct ieee80211com *) __unused; 152 static void rt2661_update_slot(struct ieee80211com *); 153 static const char *rt2661_get_rf(int); 154 static void rt2661_read_eeprom(struct rt2661_softc *, 155 uint8_t macaddr[IEEE80211_ADDR_LEN]); 156 static int rt2661_bbp_init(struct rt2661_softc *); 157 static void rt2661_init_locked(struct rt2661_softc *); 158 static void rt2661_init(void *); 159 static void rt2661_stop_locked(struct rt2661_softc *); 160 static void rt2661_stop(void *); 161 static int rt2661_load_microcode(struct rt2661_softc *); 162 #ifdef notyet 163 static void rt2661_rx_tune(struct rt2661_softc *); 164 static void rt2661_radar_start(struct rt2661_softc *); 165 static int rt2661_radar_stop(struct rt2661_softc *); 166 #endif 167 static int rt2661_prepare_beacon(struct rt2661_softc *, 168 struct ieee80211vap *); 169 static void rt2661_enable_tsf_sync(struct rt2661_softc *); 170 static void rt2661_enable_tsf(struct rt2661_softc *); 171 static int rt2661_get_rssi(struct rt2661_softc *, uint8_t); 172 173 static const struct { 174 uint32_t reg; 175 uint32_t val; 176 } rt2661_def_mac[] = { 177 RT2661_DEF_MAC 178 }; 179 180 static const struct { 181 uint8_t reg; 182 uint8_t val; 183 } rt2661_def_bbp[] = { 184 RT2661_DEF_BBP 185 }; 186 187 static const struct rfprog { 188 uint8_t chan; 189 uint32_t r1, r2, r3, r4; 190 } rt2661_rf5225_1[] = { 191 RT2661_RF5225_1 192 }, rt2661_rf5225_2[] = { 193 RT2661_RF5225_2 194 }; 195 196 int 197 rt2661_attach(device_t dev, int id) 198 { 199 struct rt2661_softc *sc = device_get_softc(dev); 200 struct ieee80211com *ic = &sc->sc_ic; 201 uint32_t val; 202 int error, ac, ntries; 203 uint8_t bands; 204 205 sc->sc_id = id; 206 sc->sc_dev = dev; 207 208 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 209 MTX_DEF | MTX_RECURSE); 210 211 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 212 mbufq_init(&sc->sc_snd, ifqmaxlen); 213 214 /* wait for NIC to initialize */ 215 for (ntries = 0; ntries < 1000; ntries++) { 216 if ((val = RAL_READ(sc, RT2661_MAC_CSR0)) != 0) 217 break; 218 DELAY(1000); 219 } 220 if (ntries == 1000) { 221 device_printf(sc->sc_dev, 222 "timeout waiting for NIC to initialize\n"); 223 error = EIO; 224 goto fail1; 225 } 226 227 /* retrieve RF rev. no and various other things from EEPROM */ 228 rt2661_read_eeprom(sc, ic->ic_macaddr); 229 230 device_printf(dev, "MAC/BBP RT%X, RF %s\n", val, 231 rt2661_get_rf(sc->rf_rev)); 232 233 /* 234 * Allocate Tx and Rx rings. 235 */ 236 for (ac = 0; ac < 4; ac++) { 237 error = rt2661_alloc_tx_ring(sc, &sc->txq[ac], 238 RT2661_TX_RING_COUNT); 239 if (error != 0) { 240 device_printf(sc->sc_dev, 241 "could not allocate Tx ring %d\n", ac); 242 goto fail2; 243 } 244 } 245 246 error = rt2661_alloc_tx_ring(sc, &sc->mgtq, RT2661_MGT_RING_COUNT); 247 if (error != 0) { 248 device_printf(sc->sc_dev, "could not allocate Mgt ring\n"); 249 goto fail2; 250 } 251 252 error = rt2661_alloc_rx_ring(sc, &sc->rxq, RT2661_RX_RING_COUNT); 253 if (error != 0) { 254 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 255 goto fail3; 256 } 257 258 ic->ic_softc = sc; 259 ic->ic_name = device_get_nameunit(dev); 260 ic->ic_opmode = IEEE80211_M_STA; 261 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 262 263 /* set device capabilities */ 264 ic->ic_caps = 265 IEEE80211_C_STA /* station mode */ 266 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 267 | IEEE80211_C_HOSTAP /* hostap mode */ 268 | IEEE80211_C_MONITOR /* monitor mode */ 269 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 270 | IEEE80211_C_WDS /* 4-address traffic works */ 271 | IEEE80211_C_MBSS /* mesh point link mode */ 272 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 273 | IEEE80211_C_SHSLOT /* short slot time supported */ 274 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 275 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 276 #ifdef notyet 277 | IEEE80211_C_TXFRAG /* handle tx frags */ 278 | IEEE80211_C_WME /* 802.11e */ 279 #endif 280 ; 281 282 bands = 0; 283 setbit(&bands, IEEE80211_MODE_11B); 284 setbit(&bands, IEEE80211_MODE_11G); 285 if (sc->rf_rev == RT2661_RF_5225 || sc->rf_rev == RT2661_RF_5325) 286 setbit(&bands, IEEE80211_MODE_11A); 287 ieee80211_init_channels(ic, NULL, &bands); 288 289 ieee80211_ifattach(ic); 290 #if 0 291 ic->ic_wme.wme_update = rt2661_wme_update; 292 #endif 293 ic->ic_scan_start = rt2661_scan_start; 294 ic->ic_scan_end = rt2661_scan_end; 295 ic->ic_set_channel = rt2661_set_channel; 296 ic->ic_updateslot = rt2661_update_slot; 297 ic->ic_update_promisc = rt2661_update_promisc; 298 ic->ic_raw_xmit = rt2661_raw_xmit; 299 ic->ic_transmit = rt2661_transmit; 300 ic->ic_parent = rt2661_parent; 301 ic->ic_vap_create = rt2661_vap_create; 302 ic->ic_vap_delete = rt2661_vap_delete; 303 304 ieee80211_radiotap_attach(ic, 305 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 306 RT2661_TX_RADIOTAP_PRESENT, 307 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 308 RT2661_RX_RADIOTAP_PRESENT); 309 310 #ifdef RAL_DEBUG 311 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 312 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 313 "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs"); 314 #endif 315 if (bootverbose) 316 ieee80211_announce(ic); 317 318 return 0; 319 320 fail3: rt2661_free_tx_ring(sc, &sc->mgtq); 321 fail2: while (--ac >= 0) 322 rt2661_free_tx_ring(sc, &sc->txq[ac]); 323 fail1: mtx_destroy(&sc->sc_mtx); 324 return error; 325 } 326 327 int 328 rt2661_detach(void *xsc) 329 { 330 struct rt2661_softc *sc = xsc; 331 struct ieee80211com *ic = &sc->sc_ic; 332 333 RAL_LOCK(sc); 334 rt2661_stop_locked(sc); 335 RAL_UNLOCK(sc); 336 337 ieee80211_ifdetach(ic); 338 mbufq_drain(&sc->sc_snd); 339 340 rt2661_free_tx_ring(sc, &sc->txq[0]); 341 rt2661_free_tx_ring(sc, &sc->txq[1]); 342 rt2661_free_tx_ring(sc, &sc->txq[2]); 343 rt2661_free_tx_ring(sc, &sc->txq[3]); 344 rt2661_free_tx_ring(sc, &sc->mgtq); 345 rt2661_free_rx_ring(sc, &sc->rxq); 346 347 mtx_destroy(&sc->sc_mtx); 348 349 return 0; 350 } 351 352 static struct ieee80211vap * 353 rt2661_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 354 enum ieee80211_opmode opmode, int flags, 355 const uint8_t bssid[IEEE80211_ADDR_LEN], 356 const uint8_t mac[IEEE80211_ADDR_LEN]) 357 { 358 struct rt2661_softc *sc = ic->ic_softc; 359 struct rt2661_vap *rvp; 360 struct ieee80211vap *vap; 361 362 switch (opmode) { 363 case IEEE80211_M_STA: 364 case IEEE80211_M_IBSS: 365 case IEEE80211_M_AHDEMO: 366 case IEEE80211_M_MONITOR: 367 case IEEE80211_M_HOSTAP: 368 case IEEE80211_M_MBSS: 369 /* XXXRP: TBD */ 370 if (!TAILQ_EMPTY(&ic->ic_vaps)) { 371 device_printf(sc->sc_dev, "only 1 vap supported\n"); 372 return NULL; 373 } 374 if (opmode == IEEE80211_M_STA) 375 flags |= IEEE80211_CLONE_NOBEACONS; 376 break; 377 case IEEE80211_M_WDS: 378 if (TAILQ_EMPTY(&ic->ic_vaps) || 379 ic->ic_opmode != IEEE80211_M_HOSTAP) { 380 device_printf(sc->sc_dev, 381 "wds only supported in ap mode\n"); 382 return NULL; 383 } 384 /* 385 * Silently remove any request for a unique 386 * bssid; WDS vap's always share the local 387 * mac address. 388 */ 389 flags &= ~IEEE80211_CLONE_BSSID; 390 break; 391 default: 392 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode); 393 return NULL; 394 } 395 rvp = malloc(sizeof(struct rt2661_vap), M_80211_VAP, M_WAITOK | M_ZERO); 396 vap = &rvp->ral_vap; 397 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid); 398 399 /* override state transition machine */ 400 rvp->ral_newstate = vap->iv_newstate; 401 vap->iv_newstate = rt2661_newstate; 402 #if 0 403 vap->iv_update_beacon = rt2661_beacon_update; 404 #endif 405 406 ieee80211_ratectl_init(vap); 407 /* complete setup */ 408 ieee80211_vap_attach(vap, ieee80211_media_change, 409 ieee80211_media_status, mac); 410 if (TAILQ_FIRST(&ic->ic_vaps) == vap) 411 ic->ic_opmode = opmode; 412 return vap; 413 } 414 415 static void 416 rt2661_vap_delete(struct ieee80211vap *vap) 417 { 418 struct rt2661_vap *rvp = RT2661_VAP(vap); 419 420 ieee80211_ratectl_deinit(vap); 421 ieee80211_vap_detach(vap); 422 free(rvp, M_80211_VAP); 423 } 424 425 void 426 rt2661_shutdown(void *xsc) 427 { 428 struct rt2661_softc *sc = xsc; 429 430 rt2661_stop(sc); 431 } 432 433 void 434 rt2661_suspend(void *xsc) 435 { 436 struct rt2661_softc *sc = xsc; 437 438 rt2661_stop(sc); 439 } 440 441 void 442 rt2661_resume(void *xsc) 443 { 444 struct rt2661_softc *sc = xsc; 445 446 if (sc->sc_ic.ic_nrunning > 0) 447 rt2661_init(sc); 448 } 449 450 static void 451 rt2661_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 452 { 453 if (error != 0) 454 return; 455 456 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 457 458 *(bus_addr_t *)arg = segs[0].ds_addr; 459 } 460 461 static int 462 rt2661_alloc_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring, 463 int count) 464 { 465 int i, error; 466 467 ring->count = count; 468 ring->queued = 0; 469 ring->cur = ring->next = ring->stat = 0; 470 471 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 472 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 473 count * RT2661_TX_DESC_SIZE, 1, count * RT2661_TX_DESC_SIZE, 474 0, NULL, NULL, &ring->desc_dmat); 475 if (error != 0) { 476 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 477 goto fail; 478 } 479 480 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 481 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 482 if (error != 0) { 483 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 484 goto fail; 485 } 486 487 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 488 count * RT2661_TX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 489 0); 490 if (error != 0) { 491 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 492 goto fail; 493 } 494 495 ring->data = malloc(count * sizeof (struct rt2661_tx_data), M_DEVBUF, 496 M_NOWAIT | M_ZERO); 497 if (ring->data == NULL) { 498 device_printf(sc->sc_dev, "could not allocate soft data\n"); 499 error = ENOMEM; 500 goto fail; 501 } 502 503 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 504 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 505 RT2661_MAX_SCATTER, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 506 if (error != 0) { 507 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 508 goto fail; 509 } 510 511 for (i = 0; i < count; i++) { 512 error = bus_dmamap_create(ring->data_dmat, 0, 513 &ring->data[i].map); 514 if (error != 0) { 515 device_printf(sc->sc_dev, "could not create DMA map\n"); 516 goto fail; 517 } 518 } 519 520 return 0; 521 522 fail: rt2661_free_tx_ring(sc, ring); 523 return error; 524 } 525 526 static void 527 rt2661_reset_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 528 { 529 struct rt2661_tx_desc *desc; 530 struct rt2661_tx_data *data; 531 int i; 532 533 for (i = 0; i < ring->count; i++) { 534 desc = &ring->desc[i]; 535 data = &ring->data[i]; 536 537 if (data->m != NULL) { 538 bus_dmamap_sync(ring->data_dmat, data->map, 539 BUS_DMASYNC_POSTWRITE); 540 bus_dmamap_unload(ring->data_dmat, data->map); 541 m_freem(data->m); 542 data->m = NULL; 543 } 544 545 if (data->ni != NULL) { 546 ieee80211_free_node(data->ni); 547 data->ni = NULL; 548 } 549 550 desc->flags = 0; 551 } 552 553 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 554 555 ring->queued = 0; 556 ring->cur = ring->next = ring->stat = 0; 557 } 558 559 static void 560 rt2661_free_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 561 { 562 struct rt2661_tx_data *data; 563 int i; 564 565 if (ring->desc != NULL) { 566 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 567 BUS_DMASYNC_POSTWRITE); 568 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 569 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 570 } 571 572 if (ring->desc_dmat != NULL) 573 bus_dma_tag_destroy(ring->desc_dmat); 574 575 if (ring->data != NULL) { 576 for (i = 0; i < ring->count; i++) { 577 data = &ring->data[i]; 578 579 if (data->m != NULL) { 580 bus_dmamap_sync(ring->data_dmat, data->map, 581 BUS_DMASYNC_POSTWRITE); 582 bus_dmamap_unload(ring->data_dmat, data->map); 583 m_freem(data->m); 584 } 585 586 if (data->ni != NULL) 587 ieee80211_free_node(data->ni); 588 589 if (data->map != NULL) 590 bus_dmamap_destroy(ring->data_dmat, data->map); 591 } 592 593 free(ring->data, M_DEVBUF); 594 } 595 596 if (ring->data_dmat != NULL) 597 bus_dma_tag_destroy(ring->data_dmat); 598 } 599 600 static int 601 rt2661_alloc_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring, 602 int count) 603 { 604 struct rt2661_rx_desc *desc; 605 struct rt2661_rx_data *data; 606 bus_addr_t physaddr; 607 int i, error; 608 609 ring->count = count; 610 ring->cur = ring->next = 0; 611 612 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 613 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 614 count * RT2661_RX_DESC_SIZE, 1, count * RT2661_RX_DESC_SIZE, 615 0, NULL, NULL, &ring->desc_dmat); 616 if (error != 0) { 617 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 618 goto fail; 619 } 620 621 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 622 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 623 if (error != 0) { 624 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 625 goto fail; 626 } 627 628 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 629 count * RT2661_RX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 630 0); 631 if (error != 0) { 632 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 633 goto fail; 634 } 635 636 ring->data = malloc(count * sizeof (struct rt2661_rx_data), M_DEVBUF, 637 M_NOWAIT | M_ZERO); 638 if (ring->data == NULL) { 639 device_printf(sc->sc_dev, "could not allocate soft data\n"); 640 error = ENOMEM; 641 goto fail; 642 } 643 644 /* 645 * Pre-allocate Rx buffers and populate Rx ring. 646 */ 647 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 648 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 649 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 650 if (error != 0) { 651 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 652 goto fail; 653 } 654 655 for (i = 0; i < count; i++) { 656 desc = &sc->rxq.desc[i]; 657 data = &sc->rxq.data[i]; 658 659 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 660 if (error != 0) { 661 device_printf(sc->sc_dev, "could not create DMA map\n"); 662 goto fail; 663 } 664 665 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 666 if (data->m == NULL) { 667 device_printf(sc->sc_dev, 668 "could not allocate rx mbuf\n"); 669 error = ENOMEM; 670 goto fail; 671 } 672 673 error = bus_dmamap_load(ring->data_dmat, data->map, 674 mtod(data->m, void *), MCLBYTES, rt2661_dma_map_addr, 675 &physaddr, 0); 676 if (error != 0) { 677 device_printf(sc->sc_dev, 678 "could not load rx buf DMA map"); 679 goto fail; 680 } 681 682 desc->flags = htole32(RT2661_RX_BUSY); 683 desc->physaddr = htole32(physaddr); 684 } 685 686 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 687 688 return 0; 689 690 fail: rt2661_free_rx_ring(sc, ring); 691 return error; 692 } 693 694 static void 695 rt2661_reset_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 696 { 697 int i; 698 699 for (i = 0; i < ring->count; i++) 700 ring->desc[i].flags = htole32(RT2661_RX_BUSY); 701 702 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 703 704 ring->cur = ring->next = 0; 705 } 706 707 static void 708 rt2661_free_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 709 { 710 struct rt2661_rx_data *data; 711 int i; 712 713 if (ring->desc != NULL) { 714 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 715 BUS_DMASYNC_POSTWRITE); 716 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 717 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 718 } 719 720 if (ring->desc_dmat != NULL) 721 bus_dma_tag_destroy(ring->desc_dmat); 722 723 if (ring->data != NULL) { 724 for (i = 0; i < ring->count; i++) { 725 data = &ring->data[i]; 726 727 if (data->m != NULL) { 728 bus_dmamap_sync(ring->data_dmat, data->map, 729 BUS_DMASYNC_POSTREAD); 730 bus_dmamap_unload(ring->data_dmat, data->map); 731 m_freem(data->m); 732 } 733 734 if (data->map != NULL) 735 bus_dmamap_destroy(ring->data_dmat, data->map); 736 } 737 738 free(ring->data, M_DEVBUF); 739 } 740 741 if (ring->data_dmat != NULL) 742 bus_dma_tag_destroy(ring->data_dmat); 743 } 744 745 static int 746 rt2661_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 747 { 748 struct rt2661_vap *rvp = RT2661_VAP(vap); 749 struct ieee80211com *ic = vap->iv_ic; 750 struct rt2661_softc *sc = ic->ic_softc; 751 int error; 752 753 if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) { 754 uint32_t tmp; 755 756 /* abort TSF synchronization */ 757 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 758 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0x00ffffff); 759 } 760 761 error = rvp->ral_newstate(vap, nstate, arg); 762 763 if (error == 0 && nstate == IEEE80211_S_RUN) { 764 struct ieee80211_node *ni = vap->iv_bss; 765 766 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 767 rt2661_enable_mrr(sc); 768 rt2661_set_txpreamble(sc); 769 rt2661_set_basicrates(sc, &ni->ni_rates); 770 rt2661_set_bssid(sc, ni->ni_bssid); 771 } 772 773 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 774 vap->iv_opmode == IEEE80211_M_IBSS || 775 vap->iv_opmode == IEEE80211_M_MBSS) { 776 error = rt2661_prepare_beacon(sc, vap); 777 if (error != 0) 778 return error; 779 } 780 if (vap->iv_opmode != IEEE80211_M_MONITOR) 781 rt2661_enable_tsf_sync(sc); 782 else 783 rt2661_enable_tsf(sc); 784 } 785 return error; 786 } 787 788 /* 789 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 790 * 93C66). 791 */ 792 static uint16_t 793 rt2661_eeprom_read(struct rt2661_softc *sc, uint8_t addr) 794 { 795 uint32_t tmp; 796 uint16_t val; 797 int n; 798 799 /* clock C once before the first command */ 800 RT2661_EEPROM_CTL(sc, 0); 801 802 RT2661_EEPROM_CTL(sc, RT2661_S); 803 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 804 RT2661_EEPROM_CTL(sc, RT2661_S); 805 806 /* write start bit (1) */ 807 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 808 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 809 810 /* write READ opcode (10) */ 811 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 812 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 813 RT2661_EEPROM_CTL(sc, RT2661_S); 814 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 815 816 /* write address (A5-A0 or A7-A0) */ 817 n = (RAL_READ(sc, RT2661_E2PROM_CSR) & RT2661_93C46) ? 5 : 7; 818 for (; n >= 0; n--) { 819 RT2661_EEPROM_CTL(sc, RT2661_S | 820 (((addr >> n) & 1) << RT2661_SHIFT_D)); 821 RT2661_EEPROM_CTL(sc, RT2661_S | 822 (((addr >> n) & 1) << RT2661_SHIFT_D) | RT2661_C); 823 } 824 825 RT2661_EEPROM_CTL(sc, RT2661_S); 826 827 /* read data Q15-Q0 */ 828 val = 0; 829 for (n = 15; n >= 0; n--) { 830 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 831 tmp = RAL_READ(sc, RT2661_E2PROM_CSR); 832 val |= ((tmp & RT2661_Q) >> RT2661_SHIFT_Q) << n; 833 RT2661_EEPROM_CTL(sc, RT2661_S); 834 } 835 836 RT2661_EEPROM_CTL(sc, 0); 837 838 /* clear Chip Select and clock C */ 839 RT2661_EEPROM_CTL(sc, RT2661_S); 840 RT2661_EEPROM_CTL(sc, 0); 841 RT2661_EEPROM_CTL(sc, RT2661_C); 842 843 return val; 844 } 845 846 static void 847 rt2661_tx_intr(struct rt2661_softc *sc) 848 { 849 struct rt2661_tx_ring *txq; 850 struct rt2661_tx_data *data; 851 uint32_t val; 852 int error, qid, retrycnt; 853 struct ieee80211vap *vap; 854 855 for (;;) { 856 struct ieee80211_node *ni; 857 struct mbuf *m; 858 859 val = RAL_READ(sc, RT2661_STA_CSR4); 860 if (!(val & RT2661_TX_STAT_VALID)) 861 break; 862 863 /* retrieve the queue in which this frame was sent */ 864 qid = RT2661_TX_QID(val); 865 txq = (qid <= 3) ? &sc->txq[qid] : &sc->mgtq; 866 867 /* retrieve rate control algorithm context */ 868 data = &txq->data[txq->stat]; 869 m = data->m; 870 data->m = NULL; 871 ni = data->ni; 872 data->ni = NULL; 873 874 /* if no frame has been sent, ignore */ 875 if (ni == NULL) 876 continue; 877 else 878 vap = ni->ni_vap; 879 880 switch (RT2661_TX_RESULT(val)) { 881 case RT2661_TX_SUCCESS: 882 retrycnt = RT2661_TX_RETRYCNT(val); 883 884 DPRINTFN(sc, 10, "data frame sent successfully after " 885 "%d retries\n", retrycnt); 886 if (data->rix != IEEE80211_FIXED_RATE_NONE) 887 ieee80211_ratectl_tx_complete(vap, ni, 888 IEEE80211_RATECTL_TX_SUCCESS, 889 &retrycnt, NULL); 890 error = 0; 891 break; 892 893 case RT2661_TX_RETRY_FAIL: 894 retrycnt = RT2661_TX_RETRYCNT(val); 895 896 DPRINTFN(sc, 9, "%s\n", 897 "sending data frame failed (too much retries)"); 898 if (data->rix != IEEE80211_FIXED_RATE_NONE) 899 ieee80211_ratectl_tx_complete(vap, ni, 900 IEEE80211_RATECTL_TX_FAILURE, 901 &retrycnt, NULL); 902 error = 1; 903 break; 904 905 default: 906 /* other failure */ 907 device_printf(sc->sc_dev, 908 "sending data frame failed 0x%08x\n", val); 909 error = 1; 910 } 911 912 DPRINTFN(sc, 15, "tx done q=%d idx=%u\n", qid, txq->stat); 913 914 txq->queued--; 915 if (++txq->stat >= txq->count) /* faster than % count */ 916 txq->stat = 0; 917 918 ieee80211_tx_complete(ni, m, error); 919 } 920 921 sc->sc_tx_timer = 0; 922 923 rt2661_start(sc); 924 } 925 926 static void 927 rt2661_tx_dma_intr(struct rt2661_softc *sc, struct rt2661_tx_ring *txq) 928 { 929 struct rt2661_tx_desc *desc; 930 struct rt2661_tx_data *data; 931 932 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_POSTREAD); 933 934 for (;;) { 935 desc = &txq->desc[txq->next]; 936 data = &txq->data[txq->next]; 937 938 if ((le32toh(desc->flags) & RT2661_TX_BUSY) || 939 !(le32toh(desc->flags) & RT2661_TX_VALID)) 940 break; 941 942 bus_dmamap_sync(txq->data_dmat, data->map, 943 BUS_DMASYNC_POSTWRITE); 944 bus_dmamap_unload(txq->data_dmat, data->map); 945 946 /* descriptor is no longer valid */ 947 desc->flags &= ~htole32(RT2661_TX_VALID); 948 949 DPRINTFN(sc, 15, "tx dma done q=%p idx=%u\n", txq, txq->next); 950 951 if (++txq->next >= txq->count) /* faster than % count */ 952 txq->next = 0; 953 } 954 955 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 956 } 957 958 static void 959 rt2661_rx_intr(struct rt2661_softc *sc) 960 { 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 if (ni != NULL) { 1078 (void) ieee80211_input(ni, m, rssi, nf); 1079 ieee80211_free_node(ni); 1080 } else 1081 (void) ieee80211_input_all(ic, m, rssi, nf); 1082 1083 RAL_LOCK(sc); 1084 sc->sc_flags &= ~RAL_INPUT_RUNNING; 1085 1086 skip: desc->flags |= htole32(RT2661_RX_BUSY); 1087 1088 DPRINTFN(sc, 15, "rx intr idx=%u\n", sc->rxq.cur); 1089 1090 sc->rxq.cur = (sc->rxq.cur + 1) % RT2661_RX_RING_COUNT; 1091 } 1092 1093 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1094 BUS_DMASYNC_PREWRITE); 1095 } 1096 1097 /* ARGSUSED */ 1098 static void 1099 rt2661_mcu_beacon_expire(struct rt2661_softc *sc) 1100 { 1101 /* do nothing */ 1102 } 1103 1104 static void 1105 rt2661_mcu_wakeup(struct rt2661_softc *sc) 1106 { 1107 RAL_WRITE(sc, RT2661_MAC_CSR11, 5 << 16); 1108 1109 RAL_WRITE(sc, RT2661_SOFT_RESET_CSR, 0x7); 1110 RAL_WRITE(sc, RT2661_IO_CNTL_CSR, 0x18); 1111 RAL_WRITE(sc, RT2661_PCI_USEC_CSR, 0x20); 1112 1113 /* send wakeup command to MCU */ 1114 rt2661_tx_cmd(sc, RT2661_MCU_CMD_WAKEUP, 0); 1115 } 1116 1117 static void 1118 rt2661_mcu_cmd_intr(struct rt2661_softc *sc) 1119 { 1120 RAL_READ(sc, RT2661_M2H_CMD_DONE_CSR); 1121 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 1122 } 1123 1124 void 1125 rt2661_intr(void *arg) 1126 { 1127 struct rt2661_softc *sc = arg; 1128 uint32_t r1, r2; 1129 1130 RAL_LOCK(sc); 1131 1132 /* disable MAC and MCU interrupts */ 1133 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffff7f); 1134 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 1135 1136 /* don't re-enable interrupts if we're shutting down */ 1137 if (!(sc->sc_flags & RAL_RUNNING)) { 1138 RAL_UNLOCK(sc); 1139 return; 1140 } 1141 1142 r1 = RAL_READ(sc, RT2661_INT_SOURCE_CSR); 1143 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, r1); 1144 1145 r2 = RAL_READ(sc, RT2661_MCU_INT_SOURCE_CSR); 1146 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, r2); 1147 1148 if (r1 & RT2661_MGT_DONE) 1149 rt2661_tx_dma_intr(sc, &sc->mgtq); 1150 1151 if (r1 & RT2661_RX_DONE) 1152 rt2661_rx_intr(sc); 1153 1154 if (r1 & RT2661_TX0_DMA_DONE) 1155 rt2661_tx_dma_intr(sc, &sc->txq[0]); 1156 1157 if (r1 & RT2661_TX1_DMA_DONE) 1158 rt2661_tx_dma_intr(sc, &sc->txq[1]); 1159 1160 if (r1 & RT2661_TX2_DMA_DONE) 1161 rt2661_tx_dma_intr(sc, &sc->txq[2]); 1162 1163 if (r1 & RT2661_TX3_DMA_DONE) 1164 rt2661_tx_dma_intr(sc, &sc->txq[3]); 1165 1166 if (r1 & RT2661_TX_DONE) 1167 rt2661_tx_intr(sc); 1168 1169 if (r2 & RT2661_MCU_CMD_DONE) 1170 rt2661_mcu_cmd_intr(sc); 1171 1172 if (r2 & RT2661_MCU_BEACON_EXPIRE) 1173 rt2661_mcu_beacon_expire(sc); 1174 1175 if (r2 & RT2661_MCU_WAKEUP) 1176 rt2661_mcu_wakeup(sc); 1177 1178 /* re-enable MAC and MCU interrupts */ 1179 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 1180 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 1181 1182 RAL_UNLOCK(sc); 1183 } 1184 1185 static uint8_t 1186 rt2661_plcp_signal(int rate) 1187 { 1188 switch (rate) { 1189 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1190 case 12: return 0xb; 1191 case 18: return 0xf; 1192 case 24: return 0xa; 1193 case 36: return 0xe; 1194 case 48: return 0x9; 1195 case 72: return 0xd; 1196 case 96: return 0x8; 1197 case 108: return 0xc; 1198 1199 /* CCK rates (NB: not IEEE std, device-specific) */ 1200 case 2: return 0x0; 1201 case 4: return 0x1; 1202 case 11: return 0x2; 1203 case 22: return 0x3; 1204 } 1205 return 0xff; /* XXX unsupported/unknown rate */ 1206 } 1207 1208 static void 1209 rt2661_setup_tx_desc(struct rt2661_softc *sc, struct rt2661_tx_desc *desc, 1210 uint32_t flags, uint16_t xflags, int len, int rate, 1211 const bus_dma_segment_t *segs, int nsegs, int ac) 1212 { 1213 struct ieee80211com *ic = &sc->sc_ic; 1214 uint16_t plcp_length; 1215 int i, remainder; 1216 1217 desc->flags = htole32(flags); 1218 desc->flags |= htole32(len << 16); 1219 desc->flags |= htole32(RT2661_TX_BUSY | RT2661_TX_VALID); 1220 1221 desc->xflags = htole16(xflags); 1222 desc->xflags |= htole16(nsegs << 13); 1223 1224 desc->wme = htole16( 1225 RT2661_QID(ac) | 1226 RT2661_AIFSN(2) | 1227 RT2661_LOGCWMIN(4) | 1228 RT2661_LOGCWMAX(10)); 1229 1230 /* 1231 * Remember in which queue this frame was sent. This field is driver 1232 * private data only. It will be made available by the NIC in STA_CSR4 1233 * on Tx interrupts. 1234 */ 1235 desc->qid = ac; 1236 1237 /* setup PLCP fields */ 1238 desc->plcp_signal = rt2661_plcp_signal(rate); 1239 desc->plcp_service = 4; 1240 1241 len += IEEE80211_CRC_LEN; 1242 if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) { 1243 desc->flags |= htole32(RT2661_TX_OFDM); 1244 1245 plcp_length = len & 0xfff; 1246 desc->plcp_length_hi = plcp_length >> 6; 1247 desc->plcp_length_lo = plcp_length & 0x3f; 1248 } else { 1249 plcp_length = (16 * len + rate - 1) / rate; 1250 if (rate == 22) { 1251 remainder = (16 * len) % 22; 1252 if (remainder != 0 && remainder < 7) 1253 desc->plcp_service |= RT2661_PLCP_LENGEXT; 1254 } 1255 desc->plcp_length_hi = plcp_length >> 8; 1256 desc->plcp_length_lo = plcp_length & 0xff; 1257 1258 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1259 desc->plcp_signal |= 0x08; 1260 } 1261 1262 /* RT2x61 supports scatter with up to 5 segments */ 1263 for (i = 0; i < nsegs; i++) { 1264 desc->addr[i] = htole32(segs[i].ds_addr); 1265 desc->len [i] = htole16(segs[i].ds_len); 1266 } 1267 } 1268 1269 static int 1270 rt2661_tx_mgt(struct rt2661_softc *sc, struct mbuf *m0, 1271 struct ieee80211_node *ni) 1272 { 1273 struct ieee80211vap *vap = ni->ni_vap; 1274 struct ieee80211com *ic = ni->ni_ic; 1275 struct rt2661_tx_desc *desc; 1276 struct rt2661_tx_data *data; 1277 struct ieee80211_frame *wh; 1278 struct ieee80211_key *k; 1279 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1280 uint16_t dur; 1281 uint32_t flags = 0; /* XXX HWSEQ */ 1282 int nsegs, rate, error; 1283 1284 desc = &sc->mgtq.desc[sc->mgtq.cur]; 1285 data = &sc->mgtq.data[sc->mgtq.cur]; 1286 1287 rate = vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)].mgmtrate; 1288 1289 wh = mtod(m0, struct ieee80211_frame *); 1290 1291 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1292 k = ieee80211_crypto_encap(ni, m0); 1293 if (k == NULL) { 1294 m_freem(m0); 1295 return ENOBUFS; 1296 } 1297 } 1298 1299 error = bus_dmamap_load_mbuf_sg(sc->mgtq.data_dmat, data->map, m0, 1300 segs, &nsegs, 0); 1301 if (error != 0) { 1302 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1303 error); 1304 m_freem(m0); 1305 return error; 1306 } 1307 1308 if (ieee80211_radiotap_active_vap(vap)) { 1309 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1310 1311 tap->wt_flags = 0; 1312 tap->wt_rate = rate; 1313 1314 ieee80211_radiotap_tx(vap, m0); 1315 } 1316 1317 data->m = m0; 1318 data->ni = ni; 1319 /* management frames are not taken into account for amrr */ 1320 data->rix = IEEE80211_FIXED_RATE_NONE; 1321 1322 wh = mtod(m0, struct ieee80211_frame *); 1323 1324 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1325 flags |= RT2661_TX_NEED_ACK; 1326 1327 dur = ieee80211_ack_duration(ic->ic_rt, 1328 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1329 *(uint16_t *)wh->i_dur = htole16(dur); 1330 1331 /* tell hardware to add timestamp in probe responses */ 1332 if ((wh->i_fc[0] & 1333 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1334 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1335 flags |= RT2661_TX_TIMESTAMP; 1336 } 1337 1338 rt2661_setup_tx_desc(sc, desc, flags, 0 /* XXX HWSEQ */, 1339 m0->m_pkthdr.len, rate, segs, nsegs, RT2661_QID_MGT); 1340 1341 bus_dmamap_sync(sc->mgtq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1342 bus_dmamap_sync(sc->mgtq.desc_dmat, sc->mgtq.desc_map, 1343 BUS_DMASYNC_PREWRITE); 1344 1345 DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n", 1346 m0->m_pkthdr.len, sc->mgtq.cur, rate); 1347 1348 /* kick mgt */ 1349 sc->mgtq.queued++; 1350 sc->mgtq.cur = (sc->mgtq.cur + 1) % RT2661_MGT_RING_COUNT; 1351 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, RT2661_KICK_MGT); 1352 1353 return 0; 1354 } 1355 1356 static int 1357 rt2661_sendprot(struct rt2661_softc *sc, int ac, 1358 const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate) 1359 { 1360 struct ieee80211com *ic = ni->ni_ic; 1361 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1362 const struct ieee80211_frame *wh; 1363 struct rt2661_tx_desc *desc; 1364 struct rt2661_tx_data *data; 1365 struct mbuf *mprot; 1366 int protrate, ackrate, pktlen, flags, isshort, error; 1367 uint16_t dur; 1368 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1369 int nsegs; 1370 1371 KASSERT(prot == IEEE80211_PROT_RTSCTS || prot == IEEE80211_PROT_CTSONLY, 1372 ("protection %d", prot)); 1373 1374 wh = mtod(m, const struct ieee80211_frame *); 1375 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN; 1376 1377 protrate = ieee80211_ctl_rate(ic->ic_rt, rate); 1378 ackrate = ieee80211_ack_rate(ic->ic_rt, rate); 1379 1380 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0; 1381 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort) 1382 + ieee80211_ack_duration(ic->ic_rt, rate, isshort); 1383 flags = RT2661_TX_MORE_FRAG; 1384 if (prot == IEEE80211_PROT_RTSCTS) { 1385 /* NB: CTS is the same size as an ACK */ 1386 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort); 1387 flags |= RT2661_TX_NEED_ACK; 1388 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur); 1389 } else { 1390 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur); 1391 } 1392 if (mprot == NULL) { 1393 /* XXX stat + msg */ 1394 return ENOBUFS; 1395 } 1396 1397 data = &txq->data[txq->cur]; 1398 desc = &txq->desc[txq->cur]; 1399 1400 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, mprot, segs, 1401 &nsegs, 0); 1402 if (error != 0) { 1403 device_printf(sc->sc_dev, 1404 "could not map mbuf (error %d)\n", error); 1405 m_freem(mprot); 1406 return error; 1407 } 1408 1409 data->m = mprot; 1410 data->ni = ieee80211_ref_node(ni); 1411 /* ctl frames are not taken into account for amrr */ 1412 data->rix = IEEE80211_FIXED_RATE_NONE; 1413 1414 rt2661_setup_tx_desc(sc, desc, flags, 0, mprot->m_pkthdr.len, 1415 protrate, segs, 1, ac); 1416 1417 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1418 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1419 1420 txq->queued++; 1421 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1422 1423 return 0; 1424 } 1425 1426 static int 1427 rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0, 1428 struct ieee80211_node *ni, int ac) 1429 { 1430 struct ieee80211vap *vap = ni->ni_vap; 1431 struct ieee80211com *ic = &sc->sc_ic; 1432 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1433 struct rt2661_tx_desc *desc; 1434 struct rt2661_tx_data *data; 1435 struct ieee80211_frame *wh; 1436 const struct ieee80211_txparam *tp; 1437 struct ieee80211_key *k; 1438 const struct chanAccParams *cap; 1439 struct mbuf *mnew; 1440 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1441 uint16_t dur; 1442 uint32_t flags; 1443 int error, nsegs, rate, noack = 0; 1444 1445 wh = mtod(m0, struct ieee80211_frame *); 1446 1447 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)]; 1448 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1449 rate = tp->mcastrate; 1450 } else if (m0->m_flags & M_EAPOL) { 1451 rate = tp->mgmtrate; 1452 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1453 rate = tp->ucastrate; 1454 } else { 1455 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1456 rate = ni->ni_txrate; 1457 } 1458 rate &= IEEE80211_RATE_VAL; 1459 1460 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) { 1461 cap = &ic->ic_wme.wme_chanParams; 1462 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1463 } 1464 1465 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 1466 k = ieee80211_crypto_encap(ni, m0); 1467 if (k == NULL) { 1468 m_freem(m0); 1469 return ENOBUFS; 1470 } 1471 1472 /* packet header may have moved, reset our local pointer */ 1473 wh = mtod(m0, struct ieee80211_frame *); 1474 } 1475 1476 flags = 0; 1477 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1478 int prot = IEEE80211_PROT_NONE; 1479 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) 1480 prot = IEEE80211_PROT_RTSCTS; 1481 else if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1482 ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) 1483 prot = ic->ic_protmode; 1484 if (prot != IEEE80211_PROT_NONE) { 1485 error = rt2661_sendprot(sc, ac, m0, ni, prot, rate); 1486 if (error) { 1487 m_freem(m0); 1488 return error; 1489 } 1490 flags |= RT2661_TX_LONG_RETRY | RT2661_TX_IFS; 1491 } 1492 } 1493 1494 data = &txq->data[txq->cur]; 1495 desc = &txq->desc[txq->cur]; 1496 1497 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs, 1498 &nsegs, 0); 1499 if (error != 0 && error != EFBIG) { 1500 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1501 error); 1502 m_freem(m0); 1503 return error; 1504 } 1505 if (error != 0) { 1506 mnew = m_defrag(m0, M_NOWAIT); 1507 if (mnew == NULL) { 1508 device_printf(sc->sc_dev, 1509 "could not defragment mbuf\n"); 1510 m_freem(m0); 1511 return ENOBUFS; 1512 } 1513 m0 = mnew; 1514 1515 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, 1516 segs, &nsegs, 0); 1517 if (error != 0) { 1518 device_printf(sc->sc_dev, 1519 "could not map mbuf (error %d)\n", error); 1520 m_freem(m0); 1521 return error; 1522 } 1523 1524 /* packet header have moved, reset our local pointer */ 1525 wh = mtod(m0, struct ieee80211_frame *); 1526 } 1527 1528 if (ieee80211_radiotap_active_vap(vap)) { 1529 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1530 1531 tap->wt_flags = 0; 1532 tap->wt_rate = rate; 1533 1534 ieee80211_radiotap_tx(vap, m0); 1535 } 1536 1537 data->m = m0; 1538 data->ni = ni; 1539 1540 /* remember link conditions for rate adaptation algorithm */ 1541 if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) { 1542 data->rix = ni->ni_txrate; 1543 /* XXX probably need last rssi value and not avg */ 1544 data->rssi = ic->ic_node_getrssi(ni); 1545 } else 1546 data->rix = IEEE80211_FIXED_RATE_NONE; 1547 1548 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1549 flags |= RT2661_TX_NEED_ACK; 1550 1551 dur = ieee80211_ack_duration(ic->ic_rt, 1552 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1553 *(uint16_t *)wh->i_dur = htole16(dur); 1554 } 1555 1556 rt2661_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate, segs, 1557 nsegs, ac); 1558 1559 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1560 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1561 1562 DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n", 1563 m0->m_pkthdr.len, txq->cur, rate); 1564 1565 /* kick Tx */ 1566 txq->queued++; 1567 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1568 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 1 << ac); 1569 1570 return 0; 1571 } 1572 1573 static int 1574 rt2661_transmit(struct ieee80211com *ic, struct mbuf *m) 1575 { 1576 struct rt2661_softc *sc = ic->ic_softc; 1577 int error; 1578 1579 RAL_LOCK(sc); 1580 if ((sc->sc_flags & RAL_RUNNING) == 0) { 1581 RAL_UNLOCK(sc); 1582 return (ENXIO); 1583 } 1584 error = mbufq_enqueue(&sc->sc_snd, m); 1585 if (error) { 1586 RAL_UNLOCK(sc); 1587 return (error); 1588 } 1589 rt2661_start(sc); 1590 RAL_UNLOCK(sc); 1591 1592 return (0); 1593 } 1594 1595 static void 1596 rt2661_start(struct rt2661_softc *sc) 1597 { 1598 struct mbuf *m; 1599 struct ieee80211_node *ni; 1600 int ac; 1601 1602 RAL_LOCK_ASSERT(sc); 1603 1604 /* prevent management frames from being sent if we're not ready */ 1605 if (!(sc->sc_flags & RAL_RUNNING) || sc->sc_invalid) 1606 return; 1607 1608 while ((m = mbufq_dequeue(&sc->sc_snd)) != NULL) { 1609 ac = M_WME_GETAC(m); 1610 if (sc->txq[ac].queued >= RT2661_TX_RING_COUNT - 1) { 1611 /* there is no place left in this ring */ 1612 mbufq_prepend(&sc->sc_snd, m); 1613 break; 1614 } 1615 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1616 if (rt2661_tx_data(sc, m, ni, ac) != 0) { 1617 ieee80211_free_node(ni); 1618 if_inc_counter(ni->ni_vap->iv_ifp, 1619 IFCOUNTER_OERRORS, 1); 1620 break; 1621 } 1622 sc->sc_tx_timer = 5; 1623 } 1624 } 1625 1626 static int 1627 rt2661_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1628 const struct ieee80211_bpf_params *params) 1629 { 1630 struct ieee80211com *ic = ni->ni_ic; 1631 struct rt2661_softc *sc = ic->ic_softc; 1632 1633 RAL_LOCK(sc); 1634 1635 /* prevent management frames from being sent if we're not ready */ 1636 if (!(sc->sc_flags & RAL_RUNNING)) { 1637 RAL_UNLOCK(sc); 1638 m_freem(m); 1639 return ENETDOWN; 1640 } 1641 if (sc->mgtq.queued >= RT2661_MGT_RING_COUNT) { 1642 RAL_UNLOCK(sc); 1643 m_freem(m); 1644 return ENOBUFS; /* XXX */ 1645 } 1646 1647 /* 1648 * Legacy path; interpret frame contents to decide 1649 * precisely how to send the frame. 1650 * XXX raw path 1651 */ 1652 if (rt2661_tx_mgt(sc, m, ni) != 0) 1653 goto bad; 1654 sc->sc_tx_timer = 5; 1655 1656 RAL_UNLOCK(sc); 1657 1658 return 0; 1659 bad: 1660 RAL_UNLOCK(sc); 1661 return EIO; /* XXX */ 1662 } 1663 1664 static void 1665 rt2661_watchdog(void *arg) 1666 { 1667 struct rt2661_softc *sc = (struct rt2661_softc *)arg; 1668 1669 RAL_LOCK_ASSERT(sc); 1670 1671 KASSERT(sc->sc_flags & RAL_RUNNING, ("not running")); 1672 1673 if (sc->sc_invalid) /* card ejected */ 1674 return; 1675 1676 if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) { 1677 device_printf(sc->sc_dev, "device timeout\n"); 1678 rt2661_init_locked(sc); 1679 counter_u64_add(sc->sc_ic.ic_oerrors, 1); 1680 /* NB: callout is reset in rt2661_init() */ 1681 return; 1682 } 1683 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 1684 } 1685 1686 static void 1687 rt2661_parent(struct ieee80211com *ic) 1688 { 1689 struct rt2661_softc *sc = ic->ic_softc; 1690 int startall = 0; 1691 1692 RAL_LOCK(sc); 1693 if (ic->ic_nrunning > 0) { 1694 if ((sc->sc_flags & RAL_RUNNING) == 0) { 1695 rt2661_init_locked(sc); 1696 startall = 1; 1697 } else 1698 rt2661_update_promisc(ic); 1699 } else if (sc->sc_flags & RAL_RUNNING) 1700 rt2661_stop_locked(sc); 1701 RAL_UNLOCK(sc); 1702 if (startall) 1703 ieee80211_start_all(ic); 1704 } 1705 1706 static void 1707 rt2661_bbp_write(struct rt2661_softc *sc, uint8_t reg, uint8_t val) 1708 { 1709 uint32_t tmp; 1710 int ntries; 1711 1712 for (ntries = 0; ntries < 100; ntries++) { 1713 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1714 break; 1715 DELAY(1); 1716 } 1717 if (ntries == 100) { 1718 device_printf(sc->sc_dev, "could not write to BBP\n"); 1719 return; 1720 } 1721 1722 tmp = RT2661_BBP_BUSY | (reg & 0x7f) << 8 | val; 1723 RAL_WRITE(sc, RT2661_PHY_CSR3, tmp); 1724 1725 DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val); 1726 } 1727 1728 static uint8_t 1729 rt2661_bbp_read(struct rt2661_softc *sc, uint8_t reg) 1730 { 1731 uint32_t val; 1732 int ntries; 1733 1734 for (ntries = 0; ntries < 100; ntries++) { 1735 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1736 break; 1737 DELAY(1); 1738 } 1739 if (ntries == 100) { 1740 device_printf(sc->sc_dev, "could not read from BBP\n"); 1741 return 0; 1742 } 1743 1744 val = RT2661_BBP_BUSY | RT2661_BBP_READ | reg << 8; 1745 RAL_WRITE(sc, RT2661_PHY_CSR3, val); 1746 1747 for (ntries = 0; ntries < 100; ntries++) { 1748 val = RAL_READ(sc, RT2661_PHY_CSR3); 1749 if (!(val & RT2661_BBP_BUSY)) 1750 return val & 0xff; 1751 DELAY(1); 1752 } 1753 1754 device_printf(sc->sc_dev, "could not read from BBP\n"); 1755 return 0; 1756 } 1757 1758 static void 1759 rt2661_rf_write(struct rt2661_softc *sc, uint8_t reg, uint32_t val) 1760 { 1761 uint32_t tmp; 1762 int ntries; 1763 1764 for (ntries = 0; ntries < 100; ntries++) { 1765 if (!(RAL_READ(sc, RT2661_PHY_CSR4) & RT2661_RF_BUSY)) 1766 break; 1767 DELAY(1); 1768 } 1769 if (ntries == 100) { 1770 device_printf(sc->sc_dev, "could not write to RF\n"); 1771 return; 1772 } 1773 1774 tmp = RT2661_RF_BUSY | RT2661_RF_21BIT | (val & 0x1fffff) << 2 | 1775 (reg & 3); 1776 RAL_WRITE(sc, RT2661_PHY_CSR4, tmp); 1777 1778 /* remember last written value in sc */ 1779 sc->rf_regs[reg] = val; 1780 1781 DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 3, val & 0x1fffff); 1782 } 1783 1784 static int 1785 rt2661_tx_cmd(struct rt2661_softc *sc, uint8_t cmd, uint16_t arg) 1786 { 1787 if (RAL_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY) 1788 return EIO; /* there is already a command pending */ 1789 1790 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 1791 RT2661_H2M_BUSY | RT2661_TOKEN_NO_INTR << 16 | arg); 1792 1793 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, RT2661_KICK_CMD | cmd); 1794 1795 return 0; 1796 } 1797 1798 static void 1799 rt2661_select_antenna(struct rt2661_softc *sc) 1800 { 1801 uint8_t bbp4, bbp77; 1802 uint32_t tmp; 1803 1804 bbp4 = rt2661_bbp_read(sc, 4); 1805 bbp77 = rt2661_bbp_read(sc, 77); 1806 1807 /* TBD */ 1808 1809 /* make sure Rx is disabled before switching antenna */ 1810 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 1811 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 1812 1813 rt2661_bbp_write(sc, 4, bbp4); 1814 rt2661_bbp_write(sc, 77, bbp77); 1815 1816 /* restore Rx filter */ 1817 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 1818 } 1819 1820 /* 1821 * Enable multi-rate retries for frames sent at OFDM rates. 1822 * In 802.11b/g mode, allow fallback to CCK rates. 1823 */ 1824 static void 1825 rt2661_enable_mrr(struct rt2661_softc *sc) 1826 { 1827 struct ieee80211com *ic = &sc->sc_ic; 1828 uint32_t tmp; 1829 1830 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1831 1832 tmp &= ~RT2661_MRR_CCK_FALLBACK; 1833 if (!IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan)) 1834 tmp |= RT2661_MRR_CCK_FALLBACK; 1835 tmp |= RT2661_MRR_ENABLED; 1836 1837 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1838 } 1839 1840 static void 1841 rt2661_set_txpreamble(struct rt2661_softc *sc) 1842 { 1843 struct ieee80211com *ic = &sc->sc_ic; 1844 uint32_t tmp; 1845 1846 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1847 1848 tmp &= ~RT2661_SHORT_PREAMBLE; 1849 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 1850 tmp |= RT2661_SHORT_PREAMBLE; 1851 1852 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1853 } 1854 1855 static void 1856 rt2661_set_basicrates(struct rt2661_softc *sc, 1857 const struct ieee80211_rateset *rs) 1858 { 1859 struct ieee80211com *ic = &sc->sc_ic; 1860 uint32_t mask = 0; 1861 uint8_t rate; 1862 int i; 1863 1864 for (i = 0; i < rs->rs_nrates; i++) { 1865 rate = rs->rs_rates[i]; 1866 1867 if (!(rate & IEEE80211_RATE_BASIC)) 1868 continue; 1869 1870 mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt, 1871 IEEE80211_RV(rate)); 1872 } 1873 1874 RAL_WRITE(sc, RT2661_TXRX_CSR5, mask); 1875 1876 DPRINTF(sc, "Setting basic rate mask to 0x%x\n", mask); 1877 } 1878 1879 /* 1880 * Reprogram MAC/BBP to switch to a new band. Values taken from the reference 1881 * driver. 1882 */ 1883 static void 1884 rt2661_select_band(struct rt2661_softc *sc, struct ieee80211_channel *c) 1885 { 1886 uint8_t bbp17, bbp35, bbp96, bbp97, bbp98, bbp104; 1887 uint32_t tmp; 1888 1889 /* update all BBP registers that depend on the band */ 1890 bbp17 = 0x20; bbp96 = 0x48; bbp104 = 0x2c; 1891 bbp35 = 0x50; bbp97 = 0x48; bbp98 = 0x48; 1892 if (IEEE80211_IS_CHAN_5GHZ(c)) { 1893 bbp17 += 0x08; bbp96 += 0x10; bbp104 += 0x0c; 1894 bbp35 += 0x10; bbp97 += 0x10; bbp98 += 0x10; 1895 } 1896 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1897 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1898 bbp17 += 0x10; bbp96 += 0x10; bbp104 += 0x10; 1899 } 1900 1901 rt2661_bbp_write(sc, 17, bbp17); 1902 rt2661_bbp_write(sc, 96, bbp96); 1903 rt2661_bbp_write(sc, 104, bbp104); 1904 1905 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1906 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1907 rt2661_bbp_write(sc, 75, 0x80); 1908 rt2661_bbp_write(sc, 86, 0x80); 1909 rt2661_bbp_write(sc, 88, 0x80); 1910 } 1911 1912 rt2661_bbp_write(sc, 35, bbp35); 1913 rt2661_bbp_write(sc, 97, bbp97); 1914 rt2661_bbp_write(sc, 98, bbp98); 1915 1916 tmp = RAL_READ(sc, RT2661_PHY_CSR0); 1917 tmp &= ~(RT2661_PA_PE_2GHZ | RT2661_PA_PE_5GHZ); 1918 if (IEEE80211_IS_CHAN_2GHZ(c)) 1919 tmp |= RT2661_PA_PE_2GHZ; 1920 else 1921 tmp |= RT2661_PA_PE_5GHZ; 1922 RAL_WRITE(sc, RT2661_PHY_CSR0, tmp); 1923 } 1924 1925 static void 1926 rt2661_set_chan(struct rt2661_softc *sc, struct ieee80211_channel *c) 1927 { 1928 struct ieee80211com *ic = &sc->sc_ic; 1929 const struct rfprog *rfprog; 1930 uint8_t bbp3, bbp94 = RT2661_BBPR94_DEFAULT; 1931 int8_t power; 1932 u_int i, chan; 1933 1934 chan = ieee80211_chan2ieee(ic, c); 1935 KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan)); 1936 1937 /* select the appropriate RF settings based on what EEPROM says */ 1938 rfprog = (sc->rfprog == 0) ? rt2661_rf5225_1 : rt2661_rf5225_2; 1939 1940 /* find the settings for this channel (we know it exists) */ 1941 for (i = 0; rfprog[i].chan != chan; i++); 1942 1943 power = sc->txpow[i]; 1944 if (power < 0) { 1945 bbp94 += power; 1946 power = 0; 1947 } else if (power > 31) { 1948 bbp94 += power - 31; 1949 power = 31; 1950 } 1951 1952 /* 1953 * If we are switching from the 2GHz band to the 5GHz band or 1954 * vice-versa, BBP registers need to be reprogrammed. 1955 */ 1956 if (c->ic_flags != sc->sc_curchan->ic_flags) { 1957 rt2661_select_band(sc, c); 1958 rt2661_select_antenna(sc); 1959 } 1960 sc->sc_curchan = c; 1961 1962 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1963 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1964 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 1965 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1966 1967 DELAY(200); 1968 1969 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1970 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1971 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7 | 1); 1972 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1973 1974 DELAY(200); 1975 1976 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 1977 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 1978 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 1979 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 1980 1981 /* enable smart mode for MIMO-capable RFs */ 1982 bbp3 = rt2661_bbp_read(sc, 3); 1983 1984 bbp3 &= ~RT2661_SMART_MODE; 1985 if (sc->rf_rev == RT2661_RF_5325 || sc->rf_rev == RT2661_RF_2529) 1986 bbp3 |= RT2661_SMART_MODE; 1987 1988 rt2661_bbp_write(sc, 3, bbp3); 1989 1990 if (bbp94 != RT2661_BBPR94_DEFAULT) 1991 rt2661_bbp_write(sc, 94, bbp94); 1992 1993 /* 5GHz radio needs a 1ms delay here */ 1994 if (IEEE80211_IS_CHAN_5GHZ(c)) 1995 DELAY(1000); 1996 } 1997 1998 static void 1999 rt2661_set_bssid(struct rt2661_softc *sc, const uint8_t *bssid) 2000 { 2001 uint32_t tmp; 2002 2003 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2004 RAL_WRITE(sc, RT2661_MAC_CSR4, tmp); 2005 2006 tmp = bssid[4] | bssid[5] << 8 | RT2661_ONE_BSSID << 16; 2007 RAL_WRITE(sc, RT2661_MAC_CSR5, tmp); 2008 } 2009 2010 static void 2011 rt2661_set_macaddr(struct rt2661_softc *sc, const uint8_t *addr) 2012 { 2013 uint32_t tmp; 2014 2015 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2016 RAL_WRITE(sc, RT2661_MAC_CSR2, tmp); 2017 2018 tmp = addr[4] | addr[5] << 8; 2019 RAL_WRITE(sc, RT2661_MAC_CSR3, tmp); 2020 } 2021 2022 static void 2023 rt2661_update_promisc(struct ieee80211com *ic) 2024 { 2025 struct rt2661_softc *sc = ic->ic_softc; 2026 uint32_t tmp; 2027 2028 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2029 2030 tmp &= ~RT2661_DROP_NOT_TO_ME; 2031 if (ic->ic_promisc == 0) 2032 tmp |= RT2661_DROP_NOT_TO_ME; 2033 2034 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2035 2036 DPRINTF(sc, "%s promiscuous mode\n", 2037 (ic->ic_promisc > 0) ? "entering" : "leaving"); 2038 } 2039 2040 /* 2041 * Update QoS (802.11e) settings for each h/w Tx ring. 2042 */ 2043 static int 2044 rt2661_wme_update(struct ieee80211com *ic) 2045 { 2046 struct rt2661_softc *sc = ic->ic_softc; 2047 const struct wmeParams *wmep; 2048 2049 wmep = ic->ic_wme.wme_chanParams.cap_wmeParams; 2050 2051 /* XXX: not sure about shifts. */ 2052 /* XXX: the reference driver plays with AC_VI settings too. */ 2053 2054 /* update TxOp */ 2055 RAL_WRITE(sc, RT2661_AC_TXOP_CSR0, 2056 wmep[WME_AC_BE].wmep_txopLimit << 16 | 2057 wmep[WME_AC_BK].wmep_txopLimit); 2058 RAL_WRITE(sc, RT2661_AC_TXOP_CSR1, 2059 wmep[WME_AC_VI].wmep_txopLimit << 16 | 2060 wmep[WME_AC_VO].wmep_txopLimit); 2061 2062 /* update CWmin */ 2063 RAL_WRITE(sc, RT2661_CWMIN_CSR, 2064 wmep[WME_AC_BE].wmep_logcwmin << 12 | 2065 wmep[WME_AC_BK].wmep_logcwmin << 8 | 2066 wmep[WME_AC_VI].wmep_logcwmin << 4 | 2067 wmep[WME_AC_VO].wmep_logcwmin); 2068 2069 /* update CWmax */ 2070 RAL_WRITE(sc, RT2661_CWMAX_CSR, 2071 wmep[WME_AC_BE].wmep_logcwmax << 12 | 2072 wmep[WME_AC_BK].wmep_logcwmax << 8 | 2073 wmep[WME_AC_VI].wmep_logcwmax << 4 | 2074 wmep[WME_AC_VO].wmep_logcwmax); 2075 2076 /* update Aifsn */ 2077 RAL_WRITE(sc, RT2661_AIFSN_CSR, 2078 wmep[WME_AC_BE].wmep_aifsn << 12 | 2079 wmep[WME_AC_BK].wmep_aifsn << 8 | 2080 wmep[WME_AC_VI].wmep_aifsn << 4 | 2081 wmep[WME_AC_VO].wmep_aifsn); 2082 2083 return 0; 2084 } 2085 2086 static void 2087 rt2661_update_slot(struct ieee80211com *ic) 2088 { 2089 struct rt2661_softc *sc = ic->ic_softc; 2090 uint8_t slottime; 2091 uint32_t tmp; 2092 2093 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2094 2095 tmp = RAL_READ(sc, RT2661_MAC_CSR9); 2096 tmp = (tmp & ~0xff) | slottime; 2097 RAL_WRITE(sc, RT2661_MAC_CSR9, tmp); 2098 } 2099 2100 static const char * 2101 rt2661_get_rf(int rev) 2102 { 2103 switch (rev) { 2104 case RT2661_RF_5225: return "RT5225"; 2105 case RT2661_RF_5325: return "RT5325 (MIMO XR)"; 2106 case RT2661_RF_2527: return "RT2527"; 2107 case RT2661_RF_2529: return "RT2529 (MIMO XR)"; 2108 default: return "unknown"; 2109 } 2110 } 2111 2112 static void 2113 rt2661_read_eeprom(struct rt2661_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2114 { 2115 uint16_t val; 2116 int i; 2117 2118 /* read MAC address */ 2119 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC01); 2120 macaddr[0] = val & 0xff; 2121 macaddr[1] = val >> 8; 2122 2123 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC23); 2124 macaddr[2] = val & 0xff; 2125 macaddr[3] = val >> 8; 2126 2127 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC45); 2128 macaddr[4] = val & 0xff; 2129 macaddr[5] = val >> 8; 2130 2131 val = rt2661_eeprom_read(sc, RT2661_EEPROM_ANTENNA); 2132 /* XXX: test if different from 0xffff? */ 2133 sc->rf_rev = (val >> 11) & 0x1f; 2134 sc->hw_radio = (val >> 10) & 0x1; 2135 sc->rx_ant = (val >> 4) & 0x3; 2136 sc->tx_ant = (val >> 2) & 0x3; 2137 sc->nb_ant = val & 0x3; 2138 2139 DPRINTF(sc, "RF revision=%d\n", sc->rf_rev); 2140 2141 val = rt2661_eeprom_read(sc, RT2661_EEPROM_CONFIG2); 2142 sc->ext_5ghz_lna = (val >> 6) & 0x1; 2143 sc->ext_2ghz_lna = (val >> 4) & 0x1; 2144 2145 DPRINTF(sc, "External 2GHz LNA=%d\nExternal 5GHz LNA=%d\n", 2146 sc->ext_2ghz_lna, sc->ext_5ghz_lna); 2147 2148 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_2GHZ_OFFSET); 2149 if ((val & 0xff) != 0xff) 2150 sc->rssi_2ghz_corr = (int8_t)(val & 0xff); /* signed */ 2151 2152 /* Only [-10, 10] is valid */ 2153 if (sc->rssi_2ghz_corr < -10 || sc->rssi_2ghz_corr > 10) 2154 sc->rssi_2ghz_corr = 0; 2155 2156 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_5GHZ_OFFSET); 2157 if ((val & 0xff) != 0xff) 2158 sc->rssi_5ghz_corr = (int8_t)(val & 0xff); /* signed */ 2159 2160 /* Only [-10, 10] is valid */ 2161 if (sc->rssi_5ghz_corr < -10 || sc->rssi_5ghz_corr > 10) 2162 sc->rssi_5ghz_corr = 0; 2163 2164 /* adjust RSSI correction for external low-noise amplifier */ 2165 if (sc->ext_2ghz_lna) 2166 sc->rssi_2ghz_corr -= 14; 2167 if (sc->ext_5ghz_lna) 2168 sc->rssi_5ghz_corr -= 14; 2169 2170 DPRINTF(sc, "RSSI 2GHz corr=%d\nRSSI 5GHz corr=%d\n", 2171 sc->rssi_2ghz_corr, sc->rssi_5ghz_corr); 2172 2173 val = rt2661_eeprom_read(sc, RT2661_EEPROM_FREQ_OFFSET); 2174 if ((val >> 8) != 0xff) 2175 sc->rfprog = (val >> 8) & 0x3; 2176 if ((val & 0xff) != 0xff) 2177 sc->rffreq = val & 0xff; 2178 2179 DPRINTF(sc, "RF prog=%d\nRF freq=%d\n", sc->rfprog, sc->rffreq); 2180 2181 /* read Tx power for all a/b/g channels */ 2182 for (i = 0; i < 19; i++) { 2183 val = rt2661_eeprom_read(sc, RT2661_EEPROM_TXPOWER + i); 2184 sc->txpow[i * 2] = (int8_t)(val >> 8); /* signed */ 2185 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2186 rt2661_rf5225_1[i * 2].chan, sc->txpow[i * 2]); 2187 sc->txpow[i * 2 + 1] = (int8_t)(val & 0xff); /* signed */ 2188 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2189 rt2661_rf5225_1[i * 2 + 1].chan, sc->txpow[i * 2 + 1]); 2190 } 2191 2192 /* read vendor-specific BBP values */ 2193 for (i = 0; i < 16; i++) { 2194 val = rt2661_eeprom_read(sc, RT2661_EEPROM_BBP_BASE + i); 2195 if (val == 0 || val == 0xffff) 2196 continue; /* skip invalid entries */ 2197 sc->bbp_prom[i].reg = val >> 8; 2198 sc->bbp_prom[i].val = val & 0xff; 2199 DPRINTF(sc, "BBP R%d=%02x\n", sc->bbp_prom[i].reg, 2200 sc->bbp_prom[i].val); 2201 } 2202 } 2203 2204 static int 2205 rt2661_bbp_init(struct rt2661_softc *sc) 2206 { 2207 int i, ntries; 2208 uint8_t val; 2209 2210 /* wait for BBP to be ready */ 2211 for (ntries = 0; ntries < 100; ntries++) { 2212 val = rt2661_bbp_read(sc, 0); 2213 if (val != 0 && val != 0xff) 2214 break; 2215 DELAY(100); 2216 } 2217 if (ntries == 100) { 2218 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2219 return EIO; 2220 } 2221 2222 /* initialize BBP registers to default values */ 2223 for (i = 0; i < nitems(rt2661_def_bbp); i++) { 2224 rt2661_bbp_write(sc, rt2661_def_bbp[i].reg, 2225 rt2661_def_bbp[i].val); 2226 } 2227 2228 /* write vendor-specific BBP values (from EEPROM) */ 2229 for (i = 0; i < 16; i++) { 2230 if (sc->bbp_prom[i].reg == 0) 2231 continue; 2232 rt2661_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2233 } 2234 2235 return 0; 2236 } 2237 2238 static void 2239 rt2661_init_locked(struct rt2661_softc *sc) 2240 { 2241 struct ieee80211com *ic = &sc->sc_ic; 2242 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2243 uint32_t tmp, sta[3]; 2244 int i, error, ntries; 2245 2246 RAL_LOCK_ASSERT(sc); 2247 2248 if ((sc->sc_flags & RAL_FW_LOADED) == 0) { 2249 error = rt2661_load_microcode(sc); 2250 if (error != 0) { 2251 device_printf(sc->sc_dev, 2252 "%s: could not load 8051 microcode, error %d\n", 2253 __func__, error); 2254 return; 2255 } 2256 sc->sc_flags |= RAL_FW_LOADED; 2257 } 2258 2259 rt2661_stop_locked(sc); 2260 2261 /* initialize Tx rings */ 2262 RAL_WRITE(sc, RT2661_AC1_BASE_CSR, sc->txq[1].physaddr); 2263 RAL_WRITE(sc, RT2661_AC0_BASE_CSR, sc->txq[0].physaddr); 2264 RAL_WRITE(sc, RT2661_AC2_BASE_CSR, sc->txq[2].physaddr); 2265 RAL_WRITE(sc, RT2661_AC3_BASE_CSR, sc->txq[3].physaddr); 2266 2267 /* initialize Mgt ring */ 2268 RAL_WRITE(sc, RT2661_MGT_BASE_CSR, sc->mgtq.physaddr); 2269 2270 /* initialize Rx ring */ 2271 RAL_WRITE(sc, RT2661_RX_BASE_CSR, sc->rxq.physaddr); 2272 2273 /* initialize Tx rings sizes */ 2274 RAL_WRITE(sc, RT2661_TX_RING_CSR0, 2275 RT2661_TX_RING_COUNT << 24 | 2276 RT2661_TX_RING_COUNT << 16 | 2277 RT2661_TX_RING_COUNT << 8 | 2278 RT2661_TX_RING_COUNT); 2279 2280 RAL_WRITE(sc, RT2661_TX_RING_CSR1, 2281 RT2661_TX_DESC_WSIZE << 16 | 2282 RT2661_TX_RING_COUNT << 8 | /* XXX: HCCA ring unused */ 2283 RT2661_MGT_RING_COUNT); 2284 2285 /* initialize Rx rings */ 2286 RAL_WRITE(sc, RT2661_RX_RING_CSR, 2287 RT2661_RX_DESC_BACK << 16 | 2288 RT2661_RX_DESC_WSIZE << 8 | 2289 RT2661_RX_RING_COUNT); 2290 2291 /* XXX: some magic here */ 2292 RAL_WRITE(sc, RT2661_TX_DMA_DST_CSR, 0xaa); 2293 2294 /* load base addresses of all 5 Tx rings (4 data + 1 mgt) */ 2295 RAL_WRITE(sc, RT2661_LOAD_TX_RING_CSR, 0x1f); 2296 2297 /* load base address of Rx ring */ 2298 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 2); 2299 2300 /* initialize MAC registers to default values */ 2301 for (i = 0; i < nitems(rt2661_def_mac); i++) 2302 RAL_WRITE(sc, rt2661_def_mac[i].reg, rt2661_def_mac[i].val); 2303 2304 rt2661_set_macaddr(sc, vap ? vap->iv_myaddr : ic->ic_macaddr); 2305 2306 /* set host ready */ 2307 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2308 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2309 2310 /* wait for BBP/RF to wakeup */ 2311 for (ntries = 0; ntries < 1000; ntries++) { 2312 if (RAL_READ(sc, RT2661_MAC_CSR12) & 8) 2313 break; 2314 DELAY(1000); 2315 } 2316 if (ntries == 1000) { 2317 printf("timeout waiting for BBP/RF to wakeup\n"); 2318 rt2661_stop_locked(sc); 2319 return; 2320 } 2321 2322 if (rt2661_bbp_init(sc) != 0) { 2323 rt2661_stop_locked(sc); 2324 return; 2325 } 2326 2327 /* select default channel */ 2328 sc->sc_curchan = ic->ic_curchan; 2329 rt2661_select_band(sc, sc->sc_curchan); 2330 rt2661_select_antenna(sc); 2331 rt2661_set_chan(sc, sc->sc_curchan); 2332 2333 /* update Rx filter */ 2334 tmp = RAL_READ(sc, RT2661_TXRX_CSR0) & 0xffff; 2335 2336 tmp |= RT2661_DROP_PHY_ERROR | RT2661_DROP_CRC_ERROR; 2337 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2338 tmp |= RT2661_DROP_CTL | RT2661_DROP_VER_ERROR | 2339 RT2661_DROP_ACKCTS; 2340 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 2341 ic->ic_opmode != IEEE80211_M_MBSS) 2342 tmp |= RT2661_DROP_TODS; 2343 if (ic->ic_promisc == 0) 2344 tmp |= RT2661_DROP_NOT_TO_ME; 2345 } 2346 2347 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2348 2349 /* clear STA registers */ 2350 RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, nitems(sta)); 2351 2352 /* initialize ASIC */ 2353 RAL_WRITE(sc, RT2661_MAC_CSR1, 4); 2354 2355 /* clear any pending interrupt */ 2356 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2357 2358 /* enable interrupts */ 2359 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 2360 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 2361 2362 /* kick Rx */ 2363 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 1); 2364 2365 sc->sc_flags |= RAL_RUNNING; 2366 2367 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 2368 } 2369 2370 static void 2371 rt2661_init(void *priv) 2372 { 2373 struct rt2661_softc *sc = priv; 2374 struct ieee80211com *ic = &sc->sc_ic; 2375 2376 RAL_LOCK(sc); 2377 rt2661_init_locked(sc); 2378 RAL_UNLOCK(sc); 2379 2380 if (sc->sc_flags & RAL_RUNNING) 2381 ieee80211_start_all(ic); /* start all vap's */ 2382 } 2383 2384 void 2385 rt2661_stop_locked(struct rt2661_softc *sc) 2386 { 2387 volatile int *flags = &sc->sc_flags; 2388 uint32_t tmp; 2389 2390 while (*flags & RAL_INPUT_RUNNING) 2391 msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10); 2392 2393 callout_stop(&sc->watchdog_ch); 2394 sc->sc_tx_timer = 0; 2395 2396 if (sc->sc_flags & RAL_RUNNING) { 2397 sc->sc_flags &= ~RAL_RUNNING; 2398 2399 /* abort Tx (for all 5 Tx rings) */ 2400 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 0x1f << 16); 2401 2402 /* disable Rx (value remains after reset!) */ 2403 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2404 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2405 2406 /* reset ASIC */ 2407 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2408 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2409 2410 /* disable interrupts */ 2411 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffffff); 2412 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 2413 2414 /* clear any pending interrupt */ 2415 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2416 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, 0xffffffff); 2417 2418 /* reset Tx and Rx rings */ 2419 rt2661_reset_tx_ring(sc, &sc->txq[0]); 2420 rt2661_reset_tx_ring(sc, &sc->txq[1]); 2421 rt2661_reset_tx_ring(sc, &sc->txq[2]); 2422 rt2661_reset_tx_ring(sc, &sc->txq[3]); 2423 rt2661_reset_tx_ring(sc, &sc->mgtq); 2424 rt2661_reset_rx_ring(sc, &sc->rxq); 2425 } 2426 } 2427 2428 void 2429 rt2661_stop(void *priv) 2430 { 2431 struct rt2661_softc *sc = priv; 2432 2433 RAL_LOCK(sc); 2434 rt2661_stop_locked(sc); 2435 RAL_UNLOCK(sc); 2436 } 2437 2438 static int 2439 rt2661_load_microcode(struct rt2661_softc *sc) 2440 { 2441 const struct firmware *fp; 2442 const char *imagename; 2443 int ntries, error; 2444 2445 RAL_LOCK_ASSERT(sc); 2446 2447 switch (sc->sc_id) { 2448 case 0x0301: imagename = "rt2561sfw"; break; 2449 case 0x0302: imagename = "rt2561fw"; break; 2450 case 0x0401: imagename = "rt2661fw"; break; 2451 default: 2452 device_printf(sc->sc_dev, "%s: unexpected pci device id 0x%x, " 2453 "don't know how to retrieve firmware\n", 2454 __func__, sc->sc_id); 2455 return EINVAL; 2456 } 2457 RAL_UNLOCK(sc); 2458 fp = firmware_get(imagename); 2459 RAL_LOCK(sc); 2460 if (fp == NULL) { 2461 device_printf(sc->sc_dev, 2462 "%s: unable to retrieve firmware image %s\n", 2463 __func__, imagename); 2464 return EINVAL; 2465 } 2466 2467 /* 2468 * Load 8051 microcode into NIC. 2469 */ 2470 /* reset 8051 */ 2471 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2472 2473 /* cancel any pending Host to MCU command */ 2474 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0); 2475 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 2476 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, 0); 2477 2478 /* write 8051's microcode */ 2479 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET | RT2661_MCU_SEL); 2480 RAL_WRITE_REGION_1(sc, RT2661_MCU_CODE_BASE, fp->data, fp->datasize); 2481 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2482 2483 /* kick 8051's ass */ 2484 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, 0); 2485 2486 /* wait for 8051 to initialize */ 2487 for (ntries = 0; ntries < 500; ntries++) { 2488 if (RAL_READ(sc, RT2661_MCU_CNTL_CSR) & RT2661_MCU_READY) 2489 break; 2490 DELAY(100); 2491 } 2492 if (ntries == 500) { 2493 device_printf(sc->sc_dev, 2494 "%s: timeout waiting for MCU to initialize\n", __func__); 2495 error = EIO; 2496 } else 2497 error = 0; 2498 2499 firmware_put(fp, FIRMWARE_UNLOAD); 2500 return error; 2501 } 2502 2503 #ifdef notyet 2504 /* 2505 * Dynamically tune Rx sensitivity (BBP register 17) based on average RSSI and 2506 * false CCA count. This function is called periodically (every seconds) when 2507 * in the RUN state. Values taken from the reference driver. 2508 */ 2509 static void 2510 rt2661_rx_tune(struct rt2661_softc *sc) 2511 { 2512 uint8_t bbp17; 2513 uint16_t cca; 2514 int lo, hi, dbm; 2515 2516 /* 2517 * Tuning range depends on operating band and on the presence of an 2518 * external low-noise amplifier. 2519 */ 2520 lo = 0x20; 2521 if (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan)) 2522 lo += 0x08; 2523 if ((IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan) && sc->ext_2ghz_lna) || 2524 (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan) && sc->ext_5ghz_lna)) 2525 lo += 0x10; 2526 hi = lo + 0x20; 2527 2528 /* retrieve false CCA count since last call (clear on read) */ 2529 cca = RAL_READ(sc, RT2661_STA_CSR1) & 0xffff; 2530 2531 if (dbm >= -35) { 2532 bbp17 = 0x60; 2533 } else if (dbm >= -58) { 2534 bbp17 = hi; 2535 } else if (dbm >= -66) { 2536 bbp17 = lo + 0x10; 2537 } else if (dbm >= -74) { 2538 bbp17 = lo + 0x08; 2539 } else { 2540 /* RSSI < -74dBm, tune using false CCA count */ 2541 2542 bbp17 = sc->bbp17; /* current value */ 2543 2544 hi -= 2 * (-74 - dbm); 2545 if (hi < lo) 2546 hi = lo; 2547 2548 if (bbp17 > hi) { 2549 bbp17 = hi; 2550 2551 } else if (cca > 512) { 2552 if (++bbp17 > hi) 2553 bbp17 = hi; 2554 } else if (cca < 100) { 2555 if (--bbp17 < lo) 2556 bbp17 = lo; 2557 } 2558 } 2559 2560 if (bbp17 != sc->bbp17) { 2561 rt2661_bbp_write(sc, 17, bbp17); 2562 sc->bbp17 = bbp17; 2563 } 2564 } 2565 2566 /* 2567 * Enter/Leave radar detection mode. 2568 * This is for 802.11h additional regulatory domains. 2569 */ 2570 static void 2571 rt2661_radar_start(struct rt2661_softc *sc) 2572 { 2573 uint32_t tmp; 2574 2575 /* disable Rx */ 2576 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2577 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2578 2579 rt2661_bbp_write(sc, 82, 0x20); 2580 rt2661_bbp_write(sc, 83, 0x00); 2581 rt2661_bbp_write(sc, 84, 0x40); 2582 2583 /* save current BBP registers values */ 2584 sc->bbp18 = rt2661_bbp_read(sc, 18); 2585 sc->bbp21 = rt2661_bbp_read(sc, 21); 2586 sc->bbp22 = rt2661_bbp_read(sc, 22); 2587 sc->bbp16 = rt2661_bbp_read(sc, 16); 2588 sc->bbp17 = rt2661_bbp_read(sc, 17); 2589 sc->bbp64 = rt2661_bbp_read(sc, 64); 2590 2591 rt2661_bbp_write(sc, 18, 0xff); 2592 rt2661_bbp_write(sc, 21, 0x3f); 2593 rt2661_bbp_write(sc, 22, 0x3f); 2594 rt2661_bbp_write(sc, 16, 0xbd); 2595 rt2661_bbp_write(sc, 17, sc->ext_5ghz_lna ? 0x44 : 0x34); 2596 rt2661_bbp_write(sc, 64, 0x21); 2597 2598 /* restore Rx filter */ 2599 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2600 } 2601 2602 static int 2603 rt2661_radar_stop(struct rt2661_softc *sc) 2604 { 2605 uint8_t bbp66; 2606 2607 /* read radar detection result */ 2608 bbp66 = rt2661_bbp_read(sc, 66); 2609 2610 /* restore BBP registers values */ 2611 rt2661_bbp_write(sc, 16, sc->bbp16); 2612 rt2661_bbp_write(sc, 17, sc->bbp17); 2613 rt2661_bbp_write(sc, 18, sc->bbp18); 2614 rt2661_bbp_write(sc, 21, sc->bbp21); 2615 rt2661_bbp_write(sc, 22, sc->bbp22); 2616 rt2661_bbp_write(sc, 64, sc->bbp64); 2617 2618 return bbp66 == 1; 2619 } 2620 #endif 2621 2622 static int 2623 rt2661_prepare_beacon(struct rt2661_softc *sc, struct ieee80211vap *vap) 2624 { 2625 struct ieee80211com *ic = vap->iv_ic; 2626 struct rt2661_tx_desc desc; 2627 struct mbuf *m0; 2628 int rate; 2629 2630 if ((m0 = ieee80211_beacon_alloc(vap->iv_bss))== NULL) { 2631 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2632 return ENOBUFS; 2633 } 2634 2635 /* send beacons at the lowest available rate */ 2636 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan) ? 12 : 2; 2637 2638 rt2661_setup_tx_desc(sc, &desc, RT2661_TX_TIMESTAMP, RT2661_TX_HWSEQ, 2639 m0->m_pkthdr.len, rate, NULL, 0, RT2661_QID_MGT); 2640 2641 /* copy the first 24 bytes of Tx descriptor into NIC memory */ 2642 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0, (uint8_t *)&desc, 24); 2643 2644 /* copy beacon header and payload into NIC memory */ 2645 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0 + 24, 2646 mtod(m0, uint8_t *), m0->m_pkthdr.len); 2647 2648 m_freem(m0); 2649 2650 return 0; 2651 } 2652 2653 /* 2654 * Enable TSF synchronization and tell h/w to start sending beacons for IBSS 2655 * and HostAP operating modes. 2656 */ 2657 static void 2658 rt2661_enable_tsf_sync(struct rt2661_softc *sc) 2659 { 2660 struct ieee80211com *ic = &sc->sc_ic; 2661 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2662 uint32_t tmp; 2663 2664 if (vap->iv_opmode != IEEE80211_M_STA) { 2665 /* 2666 * Change default 16ms TBTT adjustment to 8ms. 2667 * Must be done before enabling beacon generation. 2668 */ 2669 RAL_WRITE(sc, RT2661_TXRX_CSR10, 1 << 12 | 8); 2670 } 2671 2672 tmp = RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000; 2673 2674 /* set beacon interval (in 1/16ms unit) */ 2675 tmp |= vap->iv_bss->ni_intval * 16; 2676 2677 tmp |= RT2661_TSF_TICKING | RT2661_ENABLE_TBTT; 2678 if (vap->iv_opmode == IEEE80211_M_STA) 2679 tmp |= RT2661_TSF_MODE(1); 2680 else 2681 tmp |= RT2661_TSF_MODE(2) | RT2661_GENERATE_BEACON; 2682 2683 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp); 2684 } 2685 2686 static void 2687 rt2661_enable_tsf(struct rt2661_softc *sc) 2688 { 2689 RAL_WRITE(sc, RT2661_TXRX_CSR9, 2690 (RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000) 2691 | RT2661_TSF_TICKING | RT2661_TSF_MODE(2)); 2692 } 2693 2694 /* 2695 * Retrieve the "Received Signal Strength Indicator" from the raw values 2696 * contained in Rx descriptors. The computation depends on which band the 2697 * frame was received. Correction values taken from the reference driver. 2698 */ 2699 static int 2700 rt2661_get_rssi(struct rt2661_softc *sc, uint8_t raw) 2701 { 2702 int lna, agc, rssi; 2703 2704 lna = (raw >> 5) & 0x3; 2705 agc = raw & 0x1f; 2706 2707 if (lna == 0) { 2708 /* 2709 * No mapping available. 2710 * 2711 * NB: Since RSSI is relative to noise floor, -1 is 2712 * adequate for caller to know error happened. 2713 */ 2714 return -1; 2715 } 2716 2717 rssi = (2 * agc) - RT2661_NOISE_FLOOR; 2718 2719 if (IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan)) { 2720 rssi += sc->rssi_2ghz_corr; 2721 2722 if (lna == 1) 2723 rssi -= 64; 2724 else if (lna == 2) 2725 rssi -= 74; 2726 else if (lna == 3) 2727 rssi -= 90; 2728 } else { 2729 rssi += sc->rssi_5ghz_corr; 2730 2731 if (lna == 1) 2732 rssi -= 64; 2733 else if (lna == 2) 2734 rssi -= 86; 2735 else if (lna == 3) 2736 rssi -= 100; 2737 } 2738 return rssi; 2739 } 2740 2741 static void 2742 rt2661_scan_start(struct ieee80211com *ic) 2743 { 2744 struct rt2661_softc *sc = ic->ic_softc; 2745 uint32_t tmp; 2746 2747 /* abort TSF synchronization */ 2748 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 2749 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0xffffff); 2750 rt2661_set_bssid(sc, ieee80211broadcastaddr); 2751 } 2752 2753 static void 2754 rt2661_scan_end(struct ieee80211com *ic) 2755 { 2756 struct rt2661_softc *sc = ic->ic_softc; 2757 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2758 2759 rt2661_enable_tsf_sync(sc); 2760 /* XXX keep local copy */ 2761 rt2661_set_bssid(sc, vap->iv_bss->ni_bssid); 2762 } 2763 2764 static void 2765 rt2661_set_channel(struct ieee80211com *ic) 2766 { 2767 struct rt2661_softc *sc = ic->ic_softc; 2768 2769 RAL_LOCK(sc); 2770 rt2661_set_chan(sc, ic->ic_curchan); 2771 RAL_UNLOCK(sc); 2772 2773 } 2774