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 void rt2661_start_locked(struct ifnet *); 125 static void rt2661_start(struct ifnet *); 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 int rt2661_ioctl(struct ifnet *, u_long, caddr_t); 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 ifnet *); 151 static int rt2661_wme_update(struct ieee80211com *) __unused; 152 static void rt2661_update_slot(struct ifnet *); 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; 201 struct ifnet *ifp; 202 uint32_t val; 203 int error, ac, ntries; 204 uint8_t bands; 205 uint8_t macaddr[IEEE80211_ADDR_LEN]; 206 207 sc->sc_id = id; 208 sc->sc_dev = dev; 209 210 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 211 if (ifp == NULL) { 212 device_printf(sc->sc_dev, "can not if_alloc()\n"); 213 return ENOMEM; 214 } 215 ic = ifp->if_l2com; 216 217 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 218 MTX_DEF | MTX_RECURSE); 219 220 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 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, 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 ifp->if_softc = sc; 267 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 268 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 269 ifp->if_init = rt2661_init; 270 ifp->if_ioctl = rt2661_ioctl; 271 ifp->if_start = rt2661_start; 272 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 273 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 274 IFQ_SET_READY(&ifp->if_snd); 275 276 ic->ic_ifp = ifp; 277 ic->ic_opmode = IEEE80211_M_STA; 278 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 279 280 /* set device capabilities */ 281 ic->ic_caps = 282 IEEE80211_C_STA /* station mode */ 283 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */ 284 | IEEE80211_C_HOSTAP /* hostap mode */ 285 | IEEE80211_C_MONITOR /* monitor mode */ 286 | IEEE80211_C_AHDEMO /* adhoc demo mode */ 287 | IEEE80211_C_WDS /* 4-address traffic works */ 288 | IEEE80211_C_MBSS /* mesh point link mode */ 289 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 290 | IEEE80211_C_SHSLOT /* short slot time supported */ 291 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */ 292 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 293 #ifdef notyet 294 | IEEE80211_C_TXFRAG /* handle tx frags */ 295 | IEEE80211_C_WME /* 802.11e */ 296 #endif 297 ; 298 299 bands = 0; 300 setbit(&bands, IEEE80211_MODE_11B); 301 setbit(&bands, IEEE80211_MODE_11G); 302 if (sc->rf_rev == RT2661_RF_5225 || sc->rf_rev == RT2661_RF_5325) 303 setbit(&bands, IEEE80211_MODE_11A); 304 ieee80211_init_channels(ic, NULL, &bands); 305 306 ieee80211_ifattach(ic, macaddr); 307 #if 0 308 ic->ic_wme.wme_update = rt2661_wme_update; 309 #endif 310 ic->ic_scan_start = rt2661_scan_start; 311 ic->ic_scan_end = rt2661_scan_end; 312 ic->ic_set_channel = rt2661_set_channel; 313 ic->ic_updateslot = rt2661_update_slot; 314 ic->ic_update_promisc = rt2661_update_promisc; 315 ic->ic_raw_xmit = rt2661_raw_xmit; 316 317 ic->ic_vap_create = rt2661_vap_create; 318 ic->ic_vap_delete = rt2661_vap_delete; 319 320 ieee80211_radiotap_attach(ic, 321 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 322 RT2661_TX_RADIOTAP_PRESENT, 323 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 324 RT2661_RX_RADIOTAP_PRESENT); 325 326 #ifdef RAL_DEBUG 327 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 328 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 329 "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs"); 330 #endif 331 if (bootverbose) 332 ieee80211_announce(ic); 333 334 return 0; 335 336 fail3: rt2661_free_tx_ring(sc, &sc->mgtq); 337 fail2: while (--ac >= 0) 338 rt2661_free_tx_ring(sc, &sc->txq[ac]); 339 fail1: mtx_destroy(&sc->sc_mtx); 340 if_free(ifp); 341 return error; 342 } 343 344 int 345 rt2661_detach(void *xsc) 346 { 347 struct rt2661_softc *sc = xsc; 348 struct ifnet *ifp = sc->sc_ifp; 349 struct ieee80211com *ic = ifp->if_l2com; 350 351 RAL_LOCK(sc); 352 rt2661_stop_locked(sc); 353 RAL_UNLOCK(sc); 354 355 ieee80211_ifdetach(ic); 356 357 rt2661_free_tx_ring(sc, &sc->txq[0]); 358 rt2661_free_tx_ring(sc, &sc->txq[1]); 359 rt2661_free_tx_ring(sc, &sc->txq[2]); 360 rt2661_free_tx_ring(sc, &sc->txq[3]); 361 rt2661_free_tx_ring(sc, &sc->mgtq); 362 rt2661_free_rx_ring(sc, &sc->rxq); 363 364 if_free(ifp); 365 366 mtx_destroy(&sc->sc_mtx); 367 368 return 0; 369 } 370 371 static struct ieee80211vap * 372 rt2661_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 373 enum ieee80211_opmode opmode, int flags, 374 const uint8_t bssid[IEEE80211_ADDR_LEN], 375 const uint8_t mac[IEEE80211_ADDR_LEN]) 376 { 377 struct ifnet *ifp = ic->ic_ifp; 378 struct rt2661_vap *rvp; 379 struct ieee80211vap *vap; 380 381 switch (opmode) { 382 case IEEE80211_M_STA: 383 case IEEE80211_M_IBSS: 384 case IEEE80211_M_AHDEMO: 385 case IEEE80211_M_MONITOR: 386 case IEEE80211_M_HOSTAP: 387 case IEEE80211_M_MBSS: 388 /* XXXRP: TBD */ 389 if (!TAILQ_EMPTY(&ic->ic_vaps)) { 390 if_printf(ifp, "only 1 vap supported\n"); 391 return NULL; 392 } 393 if (opmode == IEEE80211_M_STA) 394 flags |= IEEE80211_CLONE_NOBEACONS; 395 break; 396 case IEEE80211_M_WDS: 397 if (TAILQ_EMPTY(&ic->ic_vaps) || 398 ic->ic_opmode != IEEE80211_M_HOSTAP) { 399 if_printf(ifp, "wds only supported in ap mode\n"); 400 return NULL; 401 } 402 /* 403 * Silently remove any request for a unique 404 * bssid; WDS vap's always share the local 405 * mac address. 406 */ 407 flags &= ~IEEE80211_CLONE_BSSID; 408 break; 409 default: 410 if_printf(ifp, "unknown opmode %d\n", opmode); 411 return NULL; 412 } 413 rvp = (struct rt2661_vap *) malloc(sizeof(struct rt2661_vap), 414 M_80211_VAP, M_NOWAIT | M_ZERO); 415 if (rvp == NULL) 416 return NULL; 417 vap = &rvp->ral_vap; 418 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac); 419 420 /* override state transition machine */ 421 rvp->ral_newstate = vap->iv_newstate; 422 vap->iv_newstate = rt2661_newstate; 423 #if 0 424 vap->iv_update_beacon = rt2661_beacon_update; 425 #endif 426 427 ieee80211_ratectl_init(vap); 428 /* complete setup */ 429 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status); 430 if (TAILQ_FIRST(&ic->ic_vaps) == vap) 431 ic->ic_opmode = opmode; 432 return vap; 433 } 434 435 static void 436 rt2661_vap_delete(struct ieee80211vap *vap) 437 { 438 struct rt2661_vap *rvp = RT2661_VAP(vap); 439 440 ieee80211_ratectl_deinit(vap); 441 ieee80211_vap_detach(vap); 442 free(rvp, M_80211_VAP); 443 } 444 445 void 446 rt2661_shutdown(void *xsc) 447 { 448 struct rt2661_softc *sc = xsc; 449 450 rt2661_stop(sc); 451 } 452 453 void 454 rt2661_suspend(void *xsc) 455 { 456 struct rt2661_softc *sc = xsc; 457 458 rt2661_stop(sc); 459 } 460 461 void 462 rt2661_resume(void *xsc) 463 { 464 struct rt2661_softc *sc = xsc; 465 struct ifnet *ifp = sc->sc_ifp; 466 467 if (ifp->if_flags & IFF_UP) 468 rt2661_init(sc); 469 } 470 471 static void 472 rt2661_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 473 { 474 if (error != 0) 475 return; 476 477 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 478 479 *(bus_addr_t *)arg = segs[0].ds_addr; 480 } 481 482 static int 483 rt2661_alloc_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring, 484 int count) 485 { 486 int i, error; 487 488 ring->count = count; 489 ring->queued = 0; 490 ring->cur = ring->next = ring->stat = 0; 491 492 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 493 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 494 count * RT2661_TX_DESC_SIZE, 1, count * RT2661_TX_DESC_SIZE, 495 0, NULL, NULL, &ring->desc_dmat); 496 if (error != 0) { 497 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 498 goto fail; 499 } 500 501 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 502 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 503 if (error != 0) { 504 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 505 goto fail; 506 } 507 508 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 509 count * RT2661_TX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 510 0); 511 if (error != 0) { 512 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 513 goto fail; 514 } 515 516 ring->data = malloc(count * sizeof (struct rt2661_tx_data), M_DEVBUF, 517 M_NOWAIT | M_ZERO); 518 if (ring->data == NULL) { 519 device_printf(sc->sc_dev, "could not allocate soft data\n"); 520 error = ENOMEM; 521 goto fail; 522 } 523 524 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 525 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 526 RT2661_MAX_SCATTER, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 527 if (error != 0) { 528 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 529 goto fail; 530 } 531 532 for (i = 0; i < count; i++) { 533 error = bus_dmamap_create(ring->data_dmat, 0, 534 &ring->data[i].map); 535 if (error != 0) { 536 device_printf(sc->sc_dev, "could not create DMA map\n"); 537 goto fail; 538 } 539 } 540 541 return 0; 542 543 fail: rt2661_free_tx_ring(sc, ring); 544 return error; 545 } 546 547 static void 548 rt2661_reset_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 549 { 550 struct rt2661_tx_desc *desc; 551 struct rt2661_tx_data *data; 552 int i; 553 554 for (i = 0; i < ring->count; i++) { 555 desc = &ring->desc[i]; 556 data = &ring->data[i]; 557 558 if (data->m != NULL) { 559 bus_dmamap_sync(ring->data_dmat, data->map, 560 BUS_DMASYNC_POSTWRITE); 561 bus_dmamap_unload(ring->data_dmat, data->map); 562 m_freem(data->m); 563 data->m = NULL; 564 } 565 566 if (data->ni != NULL) { 567 ieee80211_free_node(data->ni); 568 data->ni = NULL; 569 } 570 571 desc->flags = 0; 572 } 573 574 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 575 576 ring->queued = 0; 577 ring->cur = ring->next = ring->stat = 0; 578 } 579 580 static void 581 rt2661_free_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 582 { 583 struct rt2661_tx_data *data; 584 int i; 585 586 if (ring->desc != NULL) { 587 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 588 BUS_DMASYNC_POSTWRITE); 589 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 590 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 591 } 592 593 if (ring->desc_dmat != NULL) 594 bus_dma_tag_destroy(ring->desc_dmat); 595 596 if (ring->data != NULL) { 597 for (i = 0; i < ring->count; i++) { 598 data = &ring->data[i]; 599 600 if (data->m != NULL) { 601 bus_dmamap_sync(ring->data_dmat, data->map, 602 BUS_DMASYNC_POSTWRITE); 603 bus_dmamap_unload(ring->data_dmat, data->map); 604 m_freem(data->m); 605 } 606 607 if (data->ni != NULL) 608 ieee80211_free_node(data->ni); 609 610 if (data->map != NULL) 611 bus_dmamap_destroy(ring->data_dmat, data->map); 612 } 613 614 free(ring->data, M_DEVBUF); 615 } 616 617 if (ring->data_dmat != NULL) 618 bus_dma_tag_destroy(ring->data_dmat); 619 } 620 621 static int 622 rt2661_alloc_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring, 623 int count) 624 { 625 struct rt2661_rx_desc *desc; 626 struct rt2661_rx_data *data; 627 bus_addr_t physaddr; 628 int i, error; 629 630 ring->count = count; 631 ring->cur = ring->next = 0; 632 633 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 634 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 635 count * RT2661_RX_DESC_SIZE, 1, count * RT2661_RX_DESC_SIZE, 636 0, NULL, NULL, &ring->desc_dmat); 637 if (error != 0) { 638 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 639 goto fail; 640 } 641 642 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 643 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 644 if (error != 0) { 645 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 646 goto fail; 647 } 648 649 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 650 count * RT2661_RX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 651 0); 652 if (error != 0) { 653 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 654 goto fail; 655 } 656 657 ring->data = malloc(count * sizeof (struct rt2661_rx_data), M_DEVBUF, 658 M_NOWAIT | M_ZERO); 659 if (ring->data == NULL) { 660 device_printf(sc->sc_dev, "could not allocate soft data\n"); 661 error = ENOMEM; 662 goto fail; 663 } 664 665 /* 666 * Pre-allocate Rx buffers and populate Rx ring. 667 */ 668 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 669 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 670 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 671 if (error != 0) { 672 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 673 goto fail; 674 } 675 676 for (i = 0; i < count; i++) { 677 desc = &sc->rxq.desc[i]; 678 data = &sc->rxq.data[i]; 679 680 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 681 if (error != 0) { 682 device_printf(sc->sc_dev, "could not create DMA map\n"); 683 goto fail; 684 } 685 686 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 687 if (data->m == NULL) { 688 device_printf(sc->sc_dev, 689 "could not allocate rx mbuf\n"); 690 error = ENOMEM; 691 goto fail; 692 } 693 694 error = bus_dmamap_load(ring->data_dmat, data->map, 695 mtod(data->m, void *), MCLBYTES, rt2661_dma_map_addr, 696 &physaddr, 0); 697 if (error != 0) { 698 device_printf(sc->sc_dev, 699 "could not load rx buf DMA map"); 700 goto fail; 701 } 702 703 desc->flags = htole32(RT2661_RX_BUSY); 704 desc->physaddr = htole32(physaddr); 705 } 706 707 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 708 709 return 0; 710 711 fail: rt2661_free_rx_ring(sc, ring); 712 return error; 713 } 714 715 static void 716 rt2661_reset_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 717 { 718 int i; 719 720 for (i = 0; i < ring->count; i++) 721 ring->desc[i].flags = htole32(RT2661_RX_BUSY); 722 723 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 724 725 ring->cur = ring->next = 0; 726 } 727 728 static void 729 rt2661_free_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 730 { 731 struct rt2661_rx_data *data; 732 int i; 733 734 if (ring->desc != NULL) { 735 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 736 BUS_DMASYNC_POSTWRITE); 737 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 738 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 739 } 740 741 if (ring->desc_dmat != NULL) 742 bus_dma_tag_destroy(ring->desc_dmat); 743 744 if (ring->data != NULL) { 745 for (i = 0; i < ring->count; i++) { 746 data = &ring->data[i]; 747 748 if (data->m != NULL) { 749 bus_dmamap_sync(ring->data_dmat, data->map, 750 BUS_DMASYNC_POSTREAD); 751 bus_dmamap_unload(ring->data_dmat, data->map); 752 m_freem(data->m); 753 } 754 755 if (data->map != NULL) 756 bus_dmamap_destroy(ring->data_dmat, data->map); 757 } 758 759 free(ring->data, M_DEVBUF); 760 } 761 762 if (ring->data_dmat != NULL) 763 bus_dma_tag_destroy(ring->data_dmat); 764 } 765 766 static int 767 rt2661_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 768 { 769 struct rt2661_vap *rvp = RT2661_VAP(vap); 770 struct ieee80211com *ic = vap->iv_ic; 771 struct rt2661_softc *sc = ic->ic_ifp->if_softc; 772 int error; 773 774 if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) { 775 uint32_t tmp; 776 777 /* abort TSF synchronization */ 778 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 779 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0x00ffffff); 780 } 781 782 error = rvp->ral_newstate(vap, nstate, arg); 783 784 if (error == 0 && nstate == IEEE80211_S_RUN) { 785 struct ieee80211_node *ni = vap->iv_bss; 786 787 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 788 rt2661_enable_mrr(sc); 789 rt2661_set_txpreamble(sc); 790 rt2661_set_basicrates(sc, &ni->ni_rates); 791 rt2661_set_bssid(sc, ni->ni_bssid); 792 } 793 794 if (vap->iv_opmode == IEEE80211_M_HOSTAP || 795 vap->iv_opmode == IEEE80211_M_IBSS || 796 vap->iv_opmode == IEEE80211_M_MBSS) { 797 error = rt2661_prepare_beacon(sc, vap); 798 if (error != 0) 799 return error; 800 } 801 if (vap->iv_opmode != IEEE80211_M_MONITOR) 802 rt2661_enable_tsf_sync(sc); 803 else 804 rt2661_enable_tsf(sc); 805 } 806 return error; 807 } 808 809 /* 810 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 811 * 93C66). 812 */ 813 static uint16_t 814 rt2661_eeprom_read(struct rt2661_softc *sc, uint8_t addr) 815 { 816 uint32_t tmp; 817 uint16_t val; 818 int n; 819 820 /* clock C once before the first command */ 821 RT2661_EEPROM_CTL(sc, 0); 822 823 RT2661_EEPROM_CTL(sc, RT2661_S); 824 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 825 RT2661_EEPROM_CTL(sc, RT2661_S); 826 827 /* write start bit (1) */ 828 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 829 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 830 831 /* write READ opcode (10) */ 832 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 833 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 834 RT2661_EEPROM_CTL(sc, RT2661_S); 835 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 836 837 /* write address (A5-A0 or A7-A0) */ 838 n = (RAL_READ(sc, RT2661_E2PROM_CSR) & RT2661_93C46) ? 5 : 7; 839 for (; n >= 0; n--) { 840 RT2661_EEPROM_CTL(sc, RT2661_S | 841 (((addr >> n) & 1) << RT2661_SHIFT_D)); 842 RT2661_EEPROM_CTL(sc, RT2661_S | 843 (((addr >> n) & 1) << RT2661_SHIFT_D) | RT2661_C); 844 } 845 846 RT2661_EEPROM_CTL(sc, RT2661_S); 847 848 /* read data Q15-Q0 */ 849 val = 0; 850 for (n = 15; n >= 0; n--) { 851 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 852 tmp = RAL_READ(sc, RT2661_E2PROM_CSR); 853 val |= ((tmp & RT2661_Q) >> RT2661_SHIFT_Q) << n; 854 RT2661_EEPROM_CTL(sc, RT2661_S); 855 } 856 857 RT2661_EEPROM_CTL(sc, 0); 858 859 /* clear Chip Select and clock C */ 860 RT2661_EEPROM_CTL(sc, RT2661_S); 861 RT2661_EEPROM_CTL(sc, 0); 862 RT2661_EEPROM_CTL(sc, RT2661_C); 863 864 return val; 865 } 866 867 static void 868 rt2661_tx_intr(struct rt2661_softc *sc) 869 { 870 struct ifnet *ifp = sc->sc_ifp; 871 struct rt2661_tx_ring *txq; 872 struct rt2661_tx_data *data; 873 uint32_t val; 874 int qid, retrycnt; 875 struct ieee80211vap *vap; 876 877 for (;;) { 878 struct ieee80211_node *ni; 879 struct mbuf *m; 880 881 val = RAL_READ(sc, RT2661_STA_CSR4); 882 if (!(val & RT2661_TX_STAT_VALID)) 883 break; 884 885 /* retrieve the queue in which this frame was sent */ 886 qid = RT2661_TX_QID(val); 887 txq = (qid <= 3) ? &sc->txq[qid] : &sc->mgtq; 888 889 /* retrieve rate control algorithm context */ 890 data = &txq->data[txq->stat]; 891 m = data->m; 892 data->m = NULL; 893 ni = data->ni; 894 data->ni = NULL; 895 896 /* if no frame has been sent, ignore */ 897 if (ni == NULL) 898 continue; 899 else 900 vap = ni->ni_vap; 901 902 switch (RT2661_TX_RESULT(val)) { 903 case RT2661_TX_SUCCESS: 904 retrycnt = RT2661_TX_RETRYCNT(val); 905 906 DPRINTFN(sc, 10, "data frame sent successfully after " 907 "%d retries\n", retrycnt); 908 if (data->rix != IEEE80211_FIXED_RATE_NONE) 909 ieee80211_ratectl_tx_complete(vap, ni, 910 IEEE80211_RATECTL_TX_SUCCESS, 911 &retrycnt, NULL); 912 ifp->if_opackets++; 913 break; 914 915 case RT2661_TX_RETRY_FAIL: 916 retrycnt = RT2661_TX_RETRYCNT(val); 917 918 DPRINTFN(sc, 9, "%s\n", 919 "sending data frame failed (too much retries)"); 920 if (data->rix != IEEE80211_FIXED_RATE_NONE) 921 ieee80211_ratectl_tx_complete(vap, ni, 922 IEEE80211_RATECTL_TX_FAILURE, 923 &retrycnt, NULL); 924 ifp->if_oerrors++; 925 break; 926 927 default: 928 /* other failure */ 929 device_printf(sc->sc_dev, 930 "sending data frame failed 0x%08x\n", val); 931 ifp->if_oerrors++; 932 } 933 934 DPRINTFN(sc, 15, "tx done q=%d idx=%u\n", qid, txq->stat); 935 936 txq->queued--; 937 if (++txq->stat >= txq->count) /* faster than % count */ 938 txq->stat = 0; 939 940 if (m->m_flags & M_TXCB) 941 ieee80211_process_callback(ni, m, 942 RT2661_TX_RESULT(val) != RT2661_TX_SUCCESS); 943 m_freem(m); 944 ieee80211_free_node(ni); 945 } 946 947 sc->sc_tx_timer = 0; 948 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 949 950 rt2661_start_locked(ifp); 951 } 952 953 static void 954 rt2661_tx_dma_intr(struct rt2661_softc *sc, struct rt2661_tx_ring *txq) 955 { 956 struct rt2661_tx_desc *desc; 957 struct rt2661_tx_data *data; 958 959 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_POSTREAD); 960 961 for (;;) { 962 desc = &txq->desc[txq->next]; 963 data = &txq->data[txq->next]; 964 965 if ((le32toh(desc->flags) & RT2661_TX_BUSY) || 966 !(le32toh(desc->flags) & RT2661_TX_VALID)) 967 break; 968 969 bus_dmamap_sync(txq->data_dmat, data->map, 970 BUS_DMASYNC_POSTWRITE); 971 bus_dmamap_unload(txq->data_dmat, data->map); 972 973 /* descriptor is no longer valid */ 974 desc->flags &= ~htole32(RT2661_TX_VALID); 975 976 DPRINTFN(sc, 15, "tx dma done q=%p idx=%u\n", txq, txq->next); 977 978 if (++txq->next >= txq->count) /* faster than % count */ 979 txq->next = 0; 980 } 981 982 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 983 } 984 985 static void 986 rt2661_rx_intr(struct rt2661_softc *sc) 987 { 988 struct ifnet *ifp = sc->sc_ifp; 989 struct ieee80211com *ic = ifp->if_l2com; 990 struct rt2661_rx_desc *desc; 991 struct rt2661_rx_data *data; 992 bus_addr_t physaddr; 993 struct ieee80211_frame *wh; 994 struct ieee80211_node *ni; 995 struct mbuf *mnew, *m; 996 int error; 997 998 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 999 BUS_DMASYNC_POSTREAD); 1000 1001 for (;;) { 1002 int8_t rssi, nf; 1003 1004 desc = &sc->rxq.desc[sc->rxq.cur]; 1005 data = &sc->rxq.data[sc->rxq.cur]; 1006 1007 if (le32toh(desc->flags) & RT2661_RX_BUSY) 1008 break; 1009 1010 if ((le32toh(desc->flags) & RT2661_RX_PHY_ERROR) || 1011 (le32toh(desc->flags) & RT2661_RX_CRC_ERROR)) { 1012 /* 1013 * This should not happen since we did not request 1014 * to receive those frames when we filled TXRX_CSR0. 1015 */ 1016 DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n", 1017 le32toh(desc->flags)); 1018 ifp->if_ierrors++; 1019 goto skip; 1020 } 1021 1022 if ((le32toh(desc->flags) & RT2661_RX_CIPHER_MASK) != 0) { 1023 ifp->if_ierrors++; 1024 goto skip; 1025 } 1026 1027 /* 1028 * Try to allocate a new mbuf for this ring element and load it 1029 * before processing the current mbuf. If the ring element 1030 * cannot be loaded, drop the received packet and reuse the old 1031 * mbuf. In the unlikely case that the old mbuf can't be 1032 * reloaded either, explicitly panic. 1033 */ 1034 mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 1035 if (mnew == NULL) { 1036 ifp->if_ierrors++; 1037 goto skip; 1038 } 1039 1040 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1041 BUS_DMASYNC_POSTREAD); 1042 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1043 1044 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1045 mtod(mnew, void *), MCLBYTES, rt2661_dma_map_addr, 1046 &physaddr, 0); 1047 if (error != 0) { 1048 m_freem(mnew); 1049 1050 /* try to reload the old mbuf */ 1051 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1052 mtod(data->m, void *), MCLBYTES, 1053 rt2661_dma_map_addr, &physaddr, 0); 1054 if (error != 0) { 1055 /* very unlikely that it will fail... */ 1056 panic("%s: could not load old rx mbuf", 1057 device_get_name(sc->sc_dev)); 1058 } 1059 ifp->if_ierrors++; 1060 goto skip; 1061 } 1062 1063 /* 1064 * New mbuf successfully loaded, update Rx ring and continue 1065 * processing. 1066 */ 1067 m = data->m; 1068 data->m = mnew; 1069 desc->physaddr = htole32(physaddr); 1070 1071 /* finalize mbuf */ 1072 m->m_pkthdr.rcvif = ifp; 1073 m->m_pkthdr.len = m->m_len = 1074 (le32toh(desc->flags) >> 16) & 0xfff; 1075 1076 rssi = rt2661_get_rssi(sc, desc->rssi); 1077 /* Error happened during RSSI conversion. */ 1078 if (rssi < 0) 1079 rssi = -30; /* XXX ignored by net80211 */ 1080 nf = RT2661_NOISE_FLOOR; 1081 1082 if (ieee80211_radiotap_active(ic)) { 1083 struct rt2661_rx_radiotap_header *tap = &sc->sc_rxtap; 1084 uint32_t tsf_lo, tsf_hi; 1085 1086 /* get timestamp (low and high 32 bits) */ 1087 tsf_hi = RAL_READ(sc, RT2661_TXRX_CSR13); 1088 tsf_lo = RAL_READ(sc, RT2661_TXRX_CSR12); 1089 1090 tap->wr_tsf = 1091 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1092 tap->wr_flags = 0; 1093 tap->wr_rate = ieee80211_plcp2rate(desc->rate, 1094 (desc->flags & htole32(RT2661_RX_OFDM)) ? 1095 IEEE80211_T_OFDM : IEEE80211_T_CCK); 1096 tap->wr_antsignal = nf + rssi; 1097 tap->wr_antnoise = nf; 1098 } 1099 sc->sc_flags |= RAL_INPUT_RUNNING; 1100 RAL_UNLOCK(sc); 1101 wh = mtod(m, struct ieee80211_frame *); 1102 1103 /* send the frame to the 802.11 layer */ 1104 ni = ieee80211_find_rxnode(ic, 1105 (struct ieee80211_frame_min *)wh); 1106 if (ni != NULL) { 1107 (void) ieee80211_input(ni, m, rssi, nf); 1108 ieee80211_free_node(ni); 1109 } else 1110 (void) ieee80211_input_all(ic, m, rssi, nf); 1111 1112 RAL_LOCK(sc); 1113 sc->sc_flags &= ~RAL_INPUT_RUNNING; 1114 1115 skip: desc->flags |= htole32(RT2661_RX_BUSY); 1116 1117 DPRINTFN(sc, 15, "rx intr idx=%u\n", sc->rxq.cur); 1118 1119 sc->rxq.cur = (sc->rxq.cur + 1) % RT2661_RX_RING_COUNT; 1120 } 1121 1122 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1123 BUS_DMASYNC_PREWRITE); 1124 } 1125 1126 /* ARGSUSED */ 1127 static void 1128 rt2661_mcu_beacon_expire(struct rt2661_softc *sc) 1129 { 1130 /* do nothing */ 1131 } 1132 1133 static void 1134 rt2661_mcu_wakeup(struct rt2661_softc *sc) 1135 { 1136 RAL_WRITE(sc, RT2661_MAC_CSR11, 5 << 16); 1137 1138 RAL_WRITE(sc, RT2661_SOFT_RESET_CSR, 0x7); 1139 RAL_WRITE(sc, RT2661_IO_CNTL_CSR, 0x18); 1140 RAL_WRITE(sc, RT2661_PCI_USEC_CSR, 0x20); 1141 1142 /* send wakeup command to MCU */ 1143 rt2661_tx_cmd(sc, RT2661_MCU_CMD_WAKEUP, 0); 1144 } 1145 1146 static void 1147 rt2661_mcu_cmd_intr(struct rt2661_softc *sc) 1148 { 1149 RAL_READ(sc, RT2661_M2H_CMD_DONE_CSR); 1150 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 1151 } 1152 1153 void 1154 rt2661_intr(void *arg) 1155 { 1156 struct rt2661_softc *sc = arg; 1157 struct ifnet *ifp = sc->sc_ifp; 1158 uint32_t r1, r2; 1159 1160 RAL_LOCK(sc); 1161 1162 /* disable MAC and MCU interrupts */ 1163 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffff7f); 1164 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 1165 1166 /* don't re-enable interrupts if we're shutting down */ 1167 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1168 RAL_UNLOCK(sc); 1169 return; 1170 } 1171 1172 r1 = RAL_READ(sc, RT2661_INT_SOURCE_CSR); 1173 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, r1); 1174 1175 r2 = RAL_READ(sc, RT2661_MCU_INT_SOURCE_CSR); 1176 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, r2); 1177 1178 if (r1 & RT2661_MGT_DONE) 1179 rt2661_tx_dma_intr(sc, &sc->mgtq); 1180 1181 if (r1 & RT2661_RX_DONE) 1182 rt2661_rx_intr(sc); 1183 1184 if (r1 & RT2661_TX0_DMA_DONE) 1185 rt2661_tx_dma_intr(sc, &sc->txq[0]); 1186 1187 if (r1 & RT2661_TX1_DMA_DONE) 1188 rt2661_tx_dma_intr(sc, &sc->txq[1]); 1189 1190 if (r1 & RT2661_TX2_DMA_DONE) 1191 rt2661_tx_dma_intr(sc, &sc->txq[2]); 1192 1193 if (r1 & RT2661_TX3_DMA_DONE) 1194 rt2661_tx_dma_intr(sc, &sc->txq[3]); 1195 1196 if (r1 & RT2661_TX_DONE) 1197 rt2661_tx_intr(sc); 1198 1199 if (r2 & RT2661_MCU_CMD_DONE) 1200 rt2661_mcu_cmd_intr(sc); 1201 1202 if (r2 & RT2661_MCU_BEACON_EXPIRE) 1203 rt2661_mcu_beacon_expire(sc); 1204 1205 if (r2 & RT2661_MCU_WAKEUP) 1206 rt2661_mcu_wakeup(sc); 1207 1208 /* re-enable MAC and MCU interrupts */ 1209 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 1210 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 1211 1212 RAL_UNLOCK(sc); 1213 } 1214 1215 static uint8_t 1216 rt2661_plcp_signal(int rate) 1217 { 1218 switch (rate) { 1219 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1220 case 12: return 0xb; 1221 case 18: return 0xf; 1222 case 24: return 0xa; 1223 case 36: return 0xe; 1224 case 48: return 0x9; 1225 case 72: return 0xd; 1226 case 96: return 0x8; 1227 case 108: return 0xc; 1228 1229 /* CCK rates (NB: not IEEE std, device-specific) */ 1230 case 2: return 0x0; 1231 case 4: return 0x1; 1232 case 11: return 0x2; 1233 case 22: return 0x3; 1234 } 1235 return 0xff; /* XXX unsupported/unknown rate */ 1236 } 1237 1238 static void 1239 rt2661_setup_tx_desc(struct rt2661_softc *sc, struct rt2661_tx_desc *desc, 1240 uint32_t flags, uint16_t xflags, int len, int rate, 1241 const bus_dma_segment_t *segs, int nsegs, int ac) 1242 { 1243 struct ifnet *ifp = sc->sc_ifp; 1244 struct ieee80211com *ic = ifp->if_l2com; 1245 uint16_t plcp_length; 1246 int i, remainder; 1247 1248 desc->flags = htole32(flags); 1249 desc->flags |= htole32(len << 16); 1250 desc->flags |= htole32(RT2661_TX_BUSY | RT2661_TX_VALID); 1251 1252 desc->xflags = htole16(xflags); 1253 desc->xflags |= htole16(nsegs << 13); 1254 1255 desc->wme = htole16( 1256 RT2661_QID(ac) | 1257 RT2661_AIFSN(2) | 1258 RT2661_LOGCWMIN(4) | 1259 RT2661_LOGCWMAX(10)); 1260 1261 /* 1262 * Remember in which queue this frame was sent. This field is driver 1263 * private data only. It will be made available by the NIC in STA_CSR4 1264 * on Tx interrupts. 1265 */ 1266 desc->qid = ac; 1267 1268 /* setup PLCP fields */ 1269 desc->plcp_signal = rt2661_plcp_signal(rate); 1270 desc->plcp_service = 4; 1271 1272 len += IEEE80211_CRC_LEN; 1273 if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) { 1274 desc->flags |= htole32(RT2661_TX_OFDM); 1275 1276 plcp_length = len & 0xfff; 1277 desc->plcp_length_hi = plcp_length >> 6; 1278 desc->plcp_length_lo = plcp_length & 0x3f; 1279 } else { 1280 plcp_length = (16 * len + rate - 1) / rate; 1281 if (rate == 22) { 1282 remainder = (16 * len) % 22; 1283 if (remainder != 0 && remainder < 7) 1284 desc->plcp_service |= RT2661_PLCP_LENGEXT; 1285 } 1286 desc->plcp_length_hi = plcp_length >> 8; 1287 desc->plcp_length_lo = plcp_length & 0xff; 1288 1289 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1290 desc->plcp_signal |= 0x08; 1291 } 1292 1293 /* RT2x61 supports scatter with up to 5 segments */ 1294 for (i = 0; i < nsegs; i++) { 1295 desc->addr[i] = htole32(segs[i].ds_addr); 1296 desc->len [i] = htole16(segs[i].ds_len); 1297 } 1298 } 1299 1300 static int 1301 rt2661_tx_mgt(struct rt2661_softc *sc, struct mbuf *m0, 1302 struct ieee80211_node *ni) 1303 { 1304 struct ieee80211vap *vap = ni->ni_vap; 1305 struct ieee80211com *ic = ni->ni_ic; 1306 struct rt2661_tx_desc *desc; 1307 struct rt2661_tx_data *data; 1308 struct ieee80211_frame *wh; 1309 struct ieee80211_key *k; 1310 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1311 uint16_t dur; 1312 uint32_t flags = 0; /* XXX HWSEQ */ 1313 int nsegs, rate, error; 1314 1315 desc = &sc->mgtq.desc[sc->mgtq.cur]; 1316 data = &sc->mgtq.data[sc->mgtq.cur]; 1317 1318 rate = vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)].mgmtrate; 1319 1320 wh = mtod(m0, struct ieee80211_frame *); 1321 1322 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1323 k = ieee80211_crypto_encap(ni, m0); 1324 if (k == NULL) { 1325 m_freem(m0); 1326 return ENOBUFS; 1327 } 1328 } 1329 1330 error = bus_dmamap_load_mbuf_sg(sc->mgtq.data_dmat, data->map, m0, 1331 segs, &nsegs, 0); 1332 if (error != 0) { 1333 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1334 error); 1335 m_freem(m0); 1336 return error; 1337 } 1338 1339 if (ieee80211_radiotap_active_vap(vap)) { 1340 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1341 1342 tap->wt_flags = 0; 1343 tap->wt_rate = rate; 1344 1345 ieee80211_radiotap_tx(vap, m0); 1346 } 1347 1348 data->m = m0; 1349 data->ni = ni; 1350 /* management frames are not taken into account for amrr */ 1351 data->rix = IEEE80211_FIXED_RATE_NONE; 1352 1353 wh = mtod(m0, struct ieee80211_frame *); 1354 1355 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1356 flags |= RT2661_TX_NEED_ACK; 1357 1358 dur = ieee80211_ack_duration(ic->ic_rt, 1359 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1360 *(uint16_t *)wh->i_dur = htole16(dur); 1361 1362 /* tell hardware to add timestamp in probe responses */ 1363 if ((wh->i_fc[0] & 1364 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1365 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1366 flags |= RT2661_TX_TIMESTAMP; 1367 } 1368 1369 rt2661_setup_tx_desc(sc, desc, flags, 0 /* XXX HWSEQ */, 1370 m0->m_pkthdr.len, rate, segs, nsegs, RT2661_QID_MGT); 1371 1372 bus_dmamap_sync(sc->mgtq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1373 bus_dmamap_sync(sc->mgtq.desc_dmat, sc->mgtq.desc_map, 1374 BUS_DMASYNC_PREWRITE); 1375 1376 DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n", 1377 m0->m_pkthdr.len, sc->mgtq.cur, rate); 1378 1379 /* kick mgt */ 1380 sc->mgtq.queued++; 1381 sc->mgtq.cur = (sc->mgtq.cur + 1) % RT2661_MGT_RING_COUNT; 1382 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, RT2661_KICK_MGT); 1383 1384 return 0; 1385 } 1386 1387 static int 1388 rt2661_sendprot(struct rt2661_softc *sc, int ac, 1389 const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate) 1390 { 1391 struct ieee80211com *ic = ni->ni_ic; 1392 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1393 const struct ieee80211_frame *wh; 1394 struct rt2661_tx_desc *desc; 1395 struct rt2661_tx_data *data; 1396 struct mbuf *mprot; 1397 int protrate, ackrate, pktlen, flags, isshort, error; 1398 uint16_t dur; 1399 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1400 int nsegs; 1401 1402 KASSERT(prot == IEEE80211_PROT_RTSCTS || prot == IEEE80211_PROT_CTSONLY, 1403 ("protection %d", prot)); 1404 1405 wh = mtod(m, const struct ieee80211_frame *); 1406 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN; 1407 1408 protrate = ieee80211_ctl_rate(ic->ic_rt, rate); 1409 ackrate = ieee80211_ack_rate(ic->ic_rt, rate); 1410 1411 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0; 1412 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort) 1413 + ieee80211_ack_duration(ic->ic_rt, rate, isshort); 1414 flags = RT2661_TX_MORE_FRAG; 1415 if (prot == IEEE80211_PROT_RTSCTS) { 1416 /* NB: CTS is the same size as an ACK */ 1417 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort); 1418 flags |= RT2661_TX_NEED_ACK; 1419 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur); 1420 } else { 1421 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur); 1422 } 1423 if (mprot == NULL) { 1424 /* XXX stat + msg */ 1425 return ENOBUFS; 1426 } 1427 1428 data = &txq->data[txq->cur]; 1429 desc = &txq->desc[txq->cur]; 1430 1431 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, mprot, segs, 1432 &nsegs, 0); 1433 if (error != 0) { 1434 device_printf(sc->sc_dev, 1435 "could not map mbuf (error %d)\n", error); 1436 m_freem(mprot); 1437 return error; 1438 } 1439 1440 data->m = mprot; 1441 data->ni = ieee80211_ref_node(ni); 1442 /* ctl frames are not taken into account for amrr */ 1443 data->rix = IEEE80211_FIXED_RATE_NONE; 1444 1445 rt2661_setup_tx_desc(sc, desc, flags, 0, mprot->m_pkthdr.len, 1446 protrate, segs, 1, ac); 1447 1448 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1449 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1450 1451 txq->queued++; 1452 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1453 1454 return 0; 1455 } 1456 1457 static int 1458 rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0, 1459 struct ieee80211_node *ni, int ac) 1460 { 1461 struct ieee80211vap *vap = ni->ni_vap; 1462 struct ifnet *ifp = sc->sc_ifp; 1463 struct ieee80211com *ic = ifp->if_l2com; 1464 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1465 struct rt2661_tx_desc *desc; 1466 struct rt2661_tx_data *data; 1467 struct ieee80211_frame *wh; 1468 const struct ieee80211_txparam *tp; 1469 struct ieee80211_key *k; 1470 const struct chanAccParams *cap; 1471 struct mbuf *mnew; 1472 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1473 uint16_t dur; 1474 uint32_t flags; 1475 int error, nsegs, rate, noack = 0; 1476 1477 wh = mtod(m0, struct ieee80211_frame *); 1478 1479 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)]; 1480 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1481 rate = tp->mcastrate; 1482 } else if (m0->m_flags & M_EAPOL) { 1483 rate = tp->mgmtrate; 1484 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1485 rate = tp->ucastrate; 1486 } else { 1487 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1488 rate = ni->ni_txrate; 1489 } 1490 rate &= IEEE80211_RATE_VAL; 1491 1492 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) { 1493 cap = &ic->ic_wme.wme_chanParams; 1494 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1495 } 1496 1497 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1498 k = ieee80211_crypto_encap(ni, m0); 1499 if (k == NULL) { 1500 m_freem(m0); 1501 return ENOBUFS; 1502 } 1503 1504 /* packet header may have moved, reset our local pointer */ 1505 wh = mtod(m0, struct ieee80211_frame *); 1506 } 1507 1508 flags = 0; 1509 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1510 int prot = IEEE80211_PROT_NONE; 1511 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) 1512 prot = IEEE80211_PROT_RTSCTS; 1513 else if ((ic->ic_flags & IEEE80211_F_USEPROT) && 1514 ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) 1515 prot = ic->ic_protmode; 1516 if (prot != IEEE80211_PROT_NONE) { 1517 error = rt2661_sendprot(sc, ac, m0, ni, prot, rate); 1518 if (error) { 1519 m_freem(m0); 1520 return error; 1521 } 1522 flags |= RT2661_TX_LONG_RETRY | RT2661_TX_IFS; 1523 } 1524 } 1525 1526 data = &txq->data[txq->cur]; 1527 desc = &txq->desc[txq->cur]; 1528 1529 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs, 1530 &nsegs, 0); 1531 if (error != 0 && error != EFBIG) { 1532 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1533 error); 1534 m_freem(m0); 1535 return error; 1536 } 1537 if (error != 0) { 1538 mnew = m_defrag(m0, M_NOWAIT); 1539 if (mnew == NULL) { 1540 device_printf(sc->sc_dev, 1541 "could not defragment mbuf\n"); 1542 m_freem(m0); 1543 return ENOBUFS; 1544 } 1545 m0 = mnew; 1546 1547 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, 1548 segs, &nsegs, 0); 1549 if (error != 0) { 1550 device_printf(sc->sc_dev, 1551 "could not map mbuf (error %d)\n", error); 1552 m_freem(m0); 1553 return error; 1554 } 1555 1556 /* packet header have moved, reset our local pointer */ 1557 wh = mtod(m0, struct ieee80211_frame *); 1558 } 1559 1560 if (ieee80211_radiotap_active_vap(vap)) { 1561 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1562 1563 tap->wt_flags = 0; 1564 tap->wt_rate = rate; 1565 1566 ieee80211_radiotap_tx(vap, m0); 1567 } 1568 1569 data->m = m0; 1570 data->ni = ni; 1571 1572 /* remember link conditions for rate adaptation algorithm */ 1573 if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) { 1574 data->rix = ni->ni_txrate; 1575 /* XXX probably need last rssi value and not avg */ 1576 data->rssi = ic->ic_node_getrssi(ni); 1577 } else 1578 data->rix = IEEE80211_FIXED_RATE_NONE; 1579 1580 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1581 flags |= RT2661_TX_NEED_ACK; 1582 1583 dur = ieee80211_ack_duration(ic->ic_rt, 1584 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE); 1585 *(uint16_t *)wh->i_dur = htole16(dur); 1586 } 1587 1588 rt2661_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate, segs, 1589 nsegs, ac); 1590 1591 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1592 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1593 1594 DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n", 1595 m0->m_pkthdr.len, txq->cur, rate); 1596 1597 /* kick Tx */ 1598 txq->queued++; 1599 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1600 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 1 << ac); 1601 1602 return 0; 1603 } 1604 1605 static void 1606 rt2661_start_locked(struct ifnet *ifp) 1607 { 1608 struct rt2661_softc *sc = ifp->if_softc; 1609 struct mbuf *m; 1610 struct ieee80211_node *ni; 1611 int ac; 1612 1613 RAL_LOCK_ASSERT(sc); 1614 1615 /* prevent management frames from being sent if we're not ready */ 1616 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING) || sc->sc_invalid) 1617 return; 1618 1619 for (;;) { 1620 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 1621 if (m == NULL) 1622 break; 1623 1624 ac = M_WME_GETAC(m); 1625 if (sc->txq[ac].queued >= RT2661_TX_RING_COUNT - 1) { 1626 /* there is no place left in this ring */ 1627 IFQ_DRV_PREPEND(&ifp->if_snd, m); 1628 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1629 break; 1630 } 1631 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 1632 if (rt2661_tx_data(sc, m, ni, ac) != 0) { 1633 ieee80211_free_node(ni); 1634 ifp->if_oerrors++; 1635 break; 1636 } 1637 1638 sc->sc_tx_timer = 5; 1639 } 1640 } 1641 1642 static void 1643 rt2661_start(struct ifnet *ifp) 1644 { 1645 struct rt2661_softc *sc = ifp->if_softc; 1646 1647 RAL_LOCK(sc); 1648 rt2661_start_locked(ifp); 1649 RAL_UNLOCK(sc); 1650 } 1651 1652 static int 1653 rt2661_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 1654 const struct ieee80211_bpf_params *params) 1655 { 1656 struct ieee80211com *ic = ni->ni_ic; 1657 struct ifnet *ifp = ic->ic_ifp; 1658 struct rt2661_softc *sc = ifp->if_softc; 1659 1660 RAL_LOCK(sc); 1661 1662 /* prevent management frames from being sent if we're not ready */ 1663 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1664 RAL_UNLOCK(sc); 1665 m_freem(m); 1666 ieee80211_free_node(ni); 1667 return ENETDOWN; 1668 } 1669 if (sc->mgtq.queued >= RT2661_MGT_RING_COUNT) { 1670 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1671 RAL_UNLOCK(sc); 1672 m_freem(m); 1673 ieee80211_free_node(ni); 1674 return ENOBUFS; /* XXX */ 1675 } 1676 1677 ifp->if_opackets++; 1678 1679 /* 1680 * Legacy path; interpret frame contents to decide 1681 * precisely how to send the frame. 1682 * XXX raw path 1683 */ 1684 if (rt2661_tx_mgt(sc, m, ni) != 0) 1685 goto bad; 1686 sc->sc_tx_timer = 5; 1687 1688 RAL_UNLOCK(sc); 1689 1690 return 0; 1691 bad: 1692 ifp->if_oerrors++; 1693 ieee80211_free_node(ni); 1694 RAL_UNLOCK(sc); 1695 return EIO; /* XXX */ 1696 } 1697 1698 static void 1699 rt2661_watchdog(void *arg) 1700 { 1701 struct rt2661_softc *sc = (struct rt2661_softc *)arg; 1702 struct ifnet *ifp = sc->sc_ifp; 1703 1704 RAL_LOCK_ASSERT(sc); 1705 1706 KASSERT(ifp->if_drv_flags & IFF_DRV_RUNNING, ("not running")); 1707 1708 if (sc->sc_invalid) /* card ejected */ 1709 return; 1710 1711 if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) { 1712 if_printf(ifp, "device timeout\n"); 1713 rt2661_init_locked(sc); 1714 ifp->if_oerrors++; 1715 /* NB: callout is reset in rt2661_init() */ 1716 return; 1717 } 1718 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 1719 } 1720 1721 static int 1722 rt2661_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1723 { 1724 struct rt2661_softc *sc = ifp->if_softc; 1725 struct ieee80211com *ic = ifp->if_l2com; 1726 struct ifreq *ifr = (struct ifreq *) data; 1727 int error = 0, startall = 0; 1728 1729 switch (cmd) { 1730 case SIOCSIFFLAGS: 1731 RAL_LOCK(sc); 1732 if (ifp->if_flags & IFF_UP) { 1733 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { 1734 rt2661_init_locked(sc); 1735 startall = 1; 1736 } else 1737 rt2661_update_promisc(ifp); 1738 } else { 1739 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1740 rt2661_stop_locked(sc); 1741 } 1742 RAL_UNLOCK(sc); 1743 if (startall) 1744 ieee80211_start_all(ic); 1745 break; 1746 case SIOCGIFMEDIA: 1747 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 1748 break; 1749 case SIOCGIFADDR: 1750 error = ether_ioctl(ifp, cmd, data); 1751 break; 1752 default: 1753 error = EINVAL; 1754 break; 1755 } 1756 return error; 1757 } 1758 1759 static void 1760 rt2661_bbp_write(struct rt2661_softc *sc, uint8_t reg, uint8_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_CSR3) & RT2661_BBP_BUSY)) 1767 break; 1768 DELAY(1); 1769 } 1770 if (ntries == 100) { 1771 device_printf(sc->sc_dev, "could not write to BBP\n"); 1772 return; 1773 } 1774 1775 tmp = RT2661_BBP_BUSY | (reg & 0x7f) << 8 | val; 1776 RAL_WRITE(sc, RT2661_PHY_CSR3, tmp); 1777 1778 DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val); 1779 } 1780 1781 static uint8_t 1782 rt2661_bbp_read(struct rt2661_softc *sc, uint8_t reg) 1783 { 1784 uint32_t val; 1785 int ntries; 1786 1787 for (ntries = 0; ntries < 100; ntries++) { 1788 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1789 break; 1790 DELAY(1); 1791 } 1792 if (ntries == 100) { 1793 device_printf(sc->sc_dev, "could not read from BBP\n"); 1794 return 0; 1795 } 1796 1797 val = RT2661_BBP_BUSY | RT2661_BBP_READ | reg << 8; 1798 RAL_WRITE(sc, RT2661_PHY_CSR3, val); 1799 1800 for (ntries = 0; ntries < 100; ntries++) { 1801 val = RAL_READ(sc, RT2661_PHY_CSR3); 1802 if (!(val & RT2661_BBP_BUSY)) 1803 return val & 0xff; 1804 DELAY(1); 1805 } 1806 1807 device_printf(sc->sc_dev, "could not read from BBP\n"); 1808 return 0; 1809 } 1810 1811 static void 1812 rt2661_rf_write(struct rt2661_softc *sc, uint8_t reg, uint32_t val) 1813 { 1814 uint32_t tmp; 1815 int ntries; 1816 1817 for (ntries = 0; ntries < 100; ntries++) { 1818 if (!(RAL_READ(sc, RT2661_PHY_CSR4) & RT2661_RF_BUSY)) 1819 break; 1820 DELAY(1); 1821 } 1822 if (ntries == 100) { 1823 device_printf(sc->sc_dev, "could not write to RF\n"); 1824 return; 1825 } 1826 1827 tmp = RT2661_RF_BUSY | RT2661_RF_21BIT | (val & 0x1fffff) << 2 | 1828 (reg & 3); 1829 RAL_WRITE(sc, RT2661_PHY_CSR4, tmp); 1830 1831 /* remember last written value in sc */ 1832 sc->rf_regs[reg] = val; 1833 1834 DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 3, val & 0x1fffff); 1835 } 1836 1837 static int 1838 rt2661_tx_cmd(struct rt2661_softc *sc, uint8_t cmd, uint16_t arg) 1839 { 1840 if (RAL_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY) 1841 return EIO; /* there is already a command pending */ 1842 1843 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 1844 RT2661_H2M_BUSY | RT2661_TOKEN_NO_INTR << 16 | arg); 1845 1846 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, RT2661_KICK_CMD | cmd); 1847 1848 return 0; 1849 } 1850 1851 static void 1852 rt2661_select_antenna(struct rt2661_softc *sc) 1853 { 1854 uint8_t bbp4, bbp77; 1855 uint32_t tmp; 1856 1857 bbp4 = rt2661_bbp_read(sc, 4); 1858 bbp77 = rt2661_bbp_read(sc, 77); 1859 1860 /* TBD */ 1861 1862 /* make sure Rx is disabled before switching antenna */ 1863 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 1864 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 1865 1866 rt2661_bbp_write(sc, 4, bbp4); 1867 rt2661_bbp_write(sc, 77, bbp77); 1868 1869 /* restore Rx filter */ 1870 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 1871 } 1872 1873 /* 1874 * Enable multi-rate retries for frames sent at OFDM rates. 1875 * In 802.11b/g mode, allow fallback to CCK rates. 1876 */ 1877 static void 1878 rt2661_enable_mrr(struct rt2661_softc *sc) 1879 { 1880 struct ifnet *ifp = sc->sc_ifp; 1881 struct ieee80211com *ic = ifp->if_l2com; 1882 uint32_t tmp; 1883 1884 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1885 1886 tmp &= ~RT2661_MRR_CCK_FALLBACK; 1887 if (!IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan)) 1888 tmp |= RT2661_MRR_CCK_FALLBACK; 1889 tmp |= RT2661_MRR_ENABLED; 1890 1891 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1892 } 1893 1894 static void 1895 rt2661_set_txpreamble(struct rt2661_softc *sc) 1896 { 1897 struct ifnet *ifp = sc->sc_ifp; 1898 struct ieee80211com *ic = ifp->if_l2com; 1899 uint32_t tmp; 1900 1901 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 1902 1903 tmp &= ~RT2661_SHORT_PREAMBLE; 1904 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 1905 tmp |= RT2661_SHORT_PREAMBLE; 1906 1907 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 1908 } 1909 1910 static void 1911 rt2661_set_basicrates(struct rt2661_softc *sc, 1912 const struct ieee80211_rateset *rs) 1913 { 1914 #define RV(r) ((r) & IEEE80211_RATE_VAL) 1915 struct ifnet *ifp = sc->sc_ifp; 1916 struct ieee80211com *ic = ifp->if_l2com; 1917 uint32_t mask = 0; 1918 uint8_t rate; 1919 int i; 1920 1921 for (i = 0; i < rs->rs_nrates; i++) { 1922 rate = rs->rs_rates[i]; 1923 1924 if (!(rate & IEEE80211_RATE_BASIC)) 1925 continue; 1926 1927 mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt, RV(rate)); 1928 } 1929 1930 RAL_WRITE(sc, RT2661_TXRX_CSR5, mask); 1931 1932 DPRINTF(sc, "Setting basic rate mask to 0x%x\n", mask); 1933 #undef RV 1934 } 1935 1936 /* 1937 * Reprogram MAC/BBP to switch to a new band. Values taken from the reference 1938 * driver. 1939 */ 1940 static void 1941 rt2661_select_band(struct rt2661_softc *sc, struct ieee80211_channel *c) 1942 { 1943 uint8_t bbp17, bbp35, bbp96, bbp97, bbp98, bbp104; 1944 uint32_t tmp; 1945 1946 /* update all BBP registers that depend on the band */ 1947 bbp17 = 0x20; bbp96 = 0x48; bbp104 = 0x2c; 1948 bbp35 = 0x50; bbp97 = 0x48; bbp98 = 0x48; 1949 if (IEEE80211_IS_CHAN_5GHZ(c)) { 1950 bbp17 += 0x08; bbp96 += 0x10; bbp104 += 0x0c; 1951 bbp35 += 0x10; bbp97 += 0x10; bbp98 += 0x10; 1952 } 1953 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1954 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1955 bbp17 += 0x10; bbp96 += 0x10; bbp104 += 0x10; 1956 } 1957 1958 rt2661_bbp_write(sc, 17, bbp17); 1959 rt2661_bbp_write(sc, 96, bbp96); 1960 rt2661_bbp_write(sc, 104, bbp104); 1961 1962 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 1963 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 1964 rt2661_bbp_write(sc, 75, 0x80); 1965 rt2661_bbp_write(sc, 86, 0x80); 1966 rt2661_bbp_write(sc, 88, 0x80); 1967 } 1968 1969 rt2661_bbp_write(sc, 35, bbp35); 1970 rt2661_bbp_write(sc, 97, bbp97); 1971 rt2661_bbp_write(sc, 98, bbp98); 1972 1973 tmp = RAL_READ(sc, RT2661_PHY_CSR0); 1974 tmp &= ~(RT2661_PA_PE_2GHZ | RT2661_PA_PE_5GHZ); 1975 if (IEEE80211_IS_CHAN_2GHZ(c)) 1976 tmp |= RT2661_PA_PE_2GHZ; 1977 else 1978 tmp |= RT2661_PA_PE_5GHZ; 1979 RAL_WRITE(sc, RT2661_PHY_CSR0, tmp); 1980 } 1981 1982 static void 1983 rt2661_set_chan(struct rt2661_softc *sc, struct ieee80211_channel *c) 1984 { 1985 struct ifnet *ifp = sc->sc_ifp; 1986 struct ieee80211com *ic = ifp->if_l2com; 1987 const struct rfprog *rfprog; 1988 uint8_t bbp3, bbp94 = RT2661_BBPR94_DEFAULT; 1989 int8_t power; 1990 u_int i, chan; 1991 1992 chan = ieee80211_chan2ieee(ic, c); 1993 KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan)); 1994 1995 /* select the appropriate RF settings based on what EEPROM says */ 1996 rfprog = (sc->rfprog == 0) ? rt2661_rf5225_1 : rt2661_rf5225_2; 1997 1998 /* find the settings for this channel (we know it exists) */ 1999 for (i = 0; rfprog[i].chan != chan; i++); 2000 2001 power = sc->txpow[i]; 2002 if (power < 0) { 2003 bbp94 += power; 2004 power = 0; 2005 } else if (power > 31) { 2006 bbp94 += power - 31; 2007 power = 31; 2008 } 2009 2010 /* 2011 * If we are switching from the 2GHz band to the 5GHz band or 2012 * vice-versa, BBP registers need to be reprogrammed. 2013 */ 2014 if (c->ic_flags != sc->sc_curchan->ic_flags) { 2015 rt2661_select_band(sc, c); 2016 rt2661_select_antenna(sc); 2017 } 2018 sc->sc_curchan = c; 2019 2020 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 2021 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 2022 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 2023 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 2024 2025 DELAY(200); 2026 2027 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 2028 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 2029 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7 | 1); 2030 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 2031 2032 DELAY(200); 2033 2034 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 2035 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 2036 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 2037 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 2038 2039 /* enable smart mode for MIMO-capable RFs */ 2040 bbp3 = rt2661_bbp_read(sc, 3); 2041 2042 bbp3 &= ~RT2661_SMART_MODE; 2043 if (sc->rf_rev == RT2661_RF_5325 || sc->rf_rev == RT2661_RF_2529) 2044 bbp3 |= RT2661_SMART_MODE; 2045 2046 rt2661_bbp_write(sc, 3, bbp3); 2047 2048 if (bbp94 != RT2661_BBPR94_DEFAULT) 2049 rt2661_bbp_write(sc, 94, bbp94); 2050 2051 /* 5GHz radio needs a 1ms delay here */ 2052 if (IEEE80211_IS_CHAN_5GHZ(c)) 2053 DELAY(1000); 2054 } 2055 2056 static void 2057 rt2661_set_bssid(struct rt2661_softc *sc, const uint8_t *bssid) 2058 { 2059 uint32_t tmp; 2060 2061 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2062 RAL_WRITE(sc, RT2661_MAC_CSR4, tmp); 2063 2064 tmp = bssid[4] | bssid[5] << 8 | RT2661_ONE_BSSID << 16; 2065 RAL_WRITE(sc, RT2661_MAC_CSR5, tmp); 2066 } 2067 2068 static void 2069 rt2661_set_macaddr(struct rt2661_softc *sc, const uint8_t *addr) 2070 { 2071 uint32_t tmp; 2072 2073 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2074 RAL_WRITE(sc, RT2661_MAC_CSR2, tmp); 2075 2076 tmp = addr[4] | addr[5] << 8; 2077 RAL_WRITE(sc, RT2661_MAC_CSR3, tmp); 2078 } 2079 2080 static void 2081 rt2661_update_promisc(struct ifnet *ifp) 2082 { 2083 struct rt2661_softc *sc = ifp->if_softc; 2084 uint32_t tmp; 2085 2086 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2087 2088 tmp &= ~RT2661_DROP_NOT_TO_ME; 2089 if (!(ifp->if_flags & IFF_PROMISC)) 2090 tmp |= RT2661_DROP_NOT_TO_ME; 2091 2092 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2093 2094 DPRINTF(sc, "%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2095 "entering" : "leaving"); 2096 } 2097 2098 /* 2099 * Update QoS (802.11e) settings for each h/w Tx ring. 2100 */ 2101 static int 2102 rt2661_wme_update(struct ieee80211com *ic) 2103 { 2104 struct rt2661_softc *sc = ic->ic_ifp->if_softc; 2105 const struct wmeParams *wmep; 2106 2107 wmep = ic->ic_wme.wme_chanParams.cap_wmeParams; 2108 2109 /* XXX: not sure about shifts. */ 2110 /* XXX: the reference driver plays with AC_VI settings too. */ 2111 2112 /* update TxOp */ 2113 RAL_WRITE(sc, RT2661_AC_TXOP_CSR0, 2114 wmep[WME_AC_BE].wmep_txopLimit << 16 | 2115 wmep[WME_AC_BK].wmep_txopLimit); 2116 RAL_WRITE(sc, RT2661_AC_TXOP_CSR1, 2117 wmep[WME_AC_VI].wmep_txopLimit << 16 | 2118 wmep[WME_AC_VO].wmep_txopLimit); 2119 2120 /* update CWmin */ 2121 RAL_WRITE(sc, RT2661_CWMIN_CSR, 2122 wmep[WME_AC_BE].wmep_logcwmin << 12 | 2123 wmep[WME_AC_BK].wmep_logcwmin << 8 | 2124 wmep[WME_AC_VI].wmep_logcwmin << 4 | 2125 wmep[WME_AC_VO].wmep_logcwmin); 2126 2127 /* update CWmax */ 2128 RAL_WRITE(sc, RT2661_CWMAX_CSR, 2129 wmep[WME_AC_BE].wmep_logcwmax << 12 | 2130 wmep[WME_AC_BK].wmep_logcwmax << 8 | 2131 wmep[WME_AC_VI].wmep_logcwmax << 4 | 2132 wmep[WME_AC_VO].wmep_logcwmax); 2133 2134 /* update Aifsn */ 2135 RAL_WRITE(sc, RT2661_AIFSN_CSR, 2136 wmep[WME_AC_BE].wmep_aifsn << 12 | 2137 wmep[WME_AC_BK].wmep_aifsn << 8 | 2138 wmep[WME_AC_VI].wmep_aifsn << 4 | 2139 wmep[WME_AC_VO].wmep_aifsn); 2140 2141 return 0; 2142 } 2143 2144 static void 2145 rt2661_update_slot(struct ifnet *ifp) 2146 { 2147 struct rt2661_softc *sc = ifp->if_softc; 2148 struct ieee80211com *ic = ifp->if_l2com; 2149 uint8_t slottime; 2150 uint32_t tmp; 2151 2152 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2153 2154 tmp = RAL_READ(sc, RT2661_MAC_CSR9); 2155 tmp = (tmp & ~0xff) | slottime; 2156 RAL_WRITE(sc, RT2661_MAC_CSR9, tmp); 2157 } 2158 2159 static const char * 2160 rt2661_get_rf(int rev) 2161 { 2162 switch (rev) { 2163 case RT2661_RF_5225: return "RT5225"; 2164 case RT2661_RF_5325: return "RT5325 (MIMO XR)"; 2165 case RT2661_RF_2527: return "RT2527"; 2166 case RT2661_RF_2529: return "RT2529 (MIMO XR)"; 2167 default: return "unknown"; 2168 } 2169 } 2170 2171 static void 2172 rt2661_read_eeprom(struct rt2661_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2173 { 2174 uint16_t val; 2175 int i; 2176 2177 /* read MAC address */ 2178 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC01); 2179 macaddr[0] = val & 0xff; 2180 macaddr[1] = val >> 8; 2181 2182 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC23); 2183 macaddr[2] = val & 0xff; 2184 macaddr[3] = val >> 8; 2185 2186 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC45); 2187 macaddr[4] = val & 0xff; 2188 macaddr[5] = val >> 8; 2189 2190 val = rt2661_eeprom_read(sc, RT2661_EEPROM_ANTENNA); 2191 /* XXX: test if different from 0xffff? */ 2192 sc->rf_rev = (val >> 11) & 0x1f; 2193 sc->hw_radio = (val >> 10) & 0x1; 2194 sc->rx_ant = (val >> 4) & 0x3; 2195 sc->tx_ant = (val >> 2) & 0x3; 2196 sc->nb_ant = val & 0x3; 2197 2198 DPRINTF(sc, "RF revision=%d\n", sc->rf_rev); 2199 2200 val = rt2661_eeprom_read(sc, RT2661_EEPROM_CONFIG2); 2201 sc->ext_5ghz_lna = (val >> 6) & 0x1; 2202 sc->ext_2ghz_lna = (val >> 4) & 0x1; 2203 2204 DPRINTF(sc, "External 2GHz LNA=%d\nExternal 5GHz LNA=%d\n", 2205 sc->ext_2ghz_lna, sc->ext_5ghz_lna); 2206 2207 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_2GHZ_OFFSET); 2208 if ((val & 0xff) != 0xff) 2209 sc->rssi_2ghz_corr = (int8_t)(val & 0xff); /* signed */ 2210 2211 /* Only [-10, 10] is valid */ 2212 if (sc->rssi_2ghz_corr < -10 || sc->rssi_2ghz_corr > 10) 2213 sc->rssi_2ghz_corr = 0; 2214 2215 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_5GHZ_OFFSET); 2216 if ((val & 0xff) != 0xff) 2217 sc->rssi_5ghz_corr = (int8_t)(val & 0xff); /* signed */ 2218 2219 /* Only [-10, 10] is valid */ 2220 if (sc->rssi_5ghz_corr < -10 || sc->rssi_5ghz_corr > 10) 2221 sc->rssi_5ghz_corr = 0; 2222 2223 /* adjust RSSI correction for external low-noise amplifier */ 2224 if (sc->ext_2ghz_lna) 2225 sc->rssi_2ghz_corr -= 14; 2226 if (sc->ext_5ghz_lna) 2227 sc->rssi_5ghz_corr -= 14; 2228 2229 DPRINTF(sc, "RSSI 2GHz corr=%d\nRSSI 5GHz corr=%d\n", 2230 sc->rssi_2ghz_corr, sc->rssi_5ghz_corr); 2231 2232 val = rt2661_eeprom_read(sc, RT2661_EEPROM_FREQ_OFFSET); 2233 if ((val >> 8) != 0xff) 2234 sc->rfprog = (val >> 8) & 0x3; 2235 if ((val & 0xff) != 0xff) 2236 sc->rffreq = val & 0xff; 2237 2238 DPRINTF(sc, "RF prog=%d\nRF freq=%d\n", sc->rfprog, sc->rffreq); 2239 2240 /* read Tx power for all a/b/g channels */ 2241 for (i = 0; i < 19; i++) { 2242 val = rt2661_eeprom_read(sc, RT2661_EEPROM_TXPOWER + i); 2243 sc->txpow[i * 2] = (int8_t)(val >> 8); /* signed */ 2244 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2245 rt2661_rf5225_1[i * 2].chan, sc->txpow[i * 2]); 2246 sc->txpow[i * 2 + 1] = (int8_t)(val & 0xff); /* signed */ 2247 DPRINTF(sc, "Channel=%d Tx power=%d\n", 2248 rt2661_rf5225_1[i * 2 + 1].chan, sc->txpow[i * 2 + 1]); 2249 } 2250 2251 /* read vendor-specific BBP values */ 2252 for (i = 0; i < 16; i++) { 2253 val = rt2661_eeprom_read(sc, RT2661_EEPROM_BBP_BASE + i); 2254 if (val == 0 || val == 0xffff) 2255 continue; /* skip invalid entries */ 2256 sc->bbp_prom[i].reg = val >> 8; 2257 sc->bbp_prom[i].val = val & 0xff; 2258 DPRINTF(sc, "BBP R%d=%02x\n", sc->bbp_prom[i].reg, 2259 sc->bbp_prom[i].val); 2260 } 2261 } 2262 2263 static int 2264 rt2661_bbp_init(struct rt2661_softc *sc) 2265 { 2266 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2267 int i, ntries; 2268 uint8_t val; 2269 2270 /* wait for BBP to be ready */ 2271 for (ntries = 0; ntries < 100; ntries++) { 2272 val = rt2661_bbp_read(sc, 0); 2273 if (val != 0 && val != 0xff) 2274 break; 2275 DELAY(100); 2276 } 2277 if (ntries == 100) { 2278 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2279 return EIO; 2280 } 2281 2282 /* initialize BBP registers to default values */ 2283 for (i = 0; i < N(rt2661_def_bbp); i++) { 2284 rt2661_bbp_write(sc, rt2661_def_bbp[i].reg, 2285 rt2661_def_bbp[i].val); 2286 } 2287 2288 /* write vendor-specific BBP values (from EEPROM) */ 2289 for (i = 0; i < 16; i++) { 2290 if (sc->bbp_prom[i].reg == 0) 2291 continue; 2292 rt2661_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2293 } 2294 2295 return 0; 2296 #undef N 2297 } 2298 2299 static void 2300 rt2661_init_locked(struct rt2661_softc *sc) 2301 { 2302 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2303 struct ifnet *ifp = sc->sc_ifp; 2304 struct ieee80211com *ic = ifp->if_l2com; 2305 uint32_t tmp, sta[3]; 2306 int i, error, ntries; 2307 2308 RAL_LOCK_ASSERT(sc); 2309 2310 if ((sc->sc_flags & RAL_FW_LOADED) == 0) { 2311 error = rt2661_load_microcode(sc); 2312 if (error != 0) { 2313 if_printf(ifp, 2314 "%s: could not load 8051 microcode, error %d\n", 2315 __func__, error); 2316 return; 2317 } 2318 sc->sc_flags |= RAL_FW_LOADED; 2319 } 2320 2321 rt2661_stop_locked(sc); 2322 2323 /* initialize Tx rings */ 2324 RAL_WRITE(sc, RT2661_AC1_BASE_CSR, sc->txq[1].physaddr); 2325 RAL_WRITE(sc, RT2661_AC0_BASE_CSR, sc->txq[0].physaddr); 2326 RAL_WRITE(sc, RT2661_AC2_BASE_CSR, sc->txq[2].physaddr); 2327 RAL_WRITE(sc, RT2661_AC3_BASE_CSR, sc->txq[3].physaddr); 2328 2329 /* initialize Mgt ring */ 2330 RAL_WRITE(sc, RT2661_MGT_BASE_CSR, sc->mgtq.physaddr); 2331 2332 /* initialize Rx ring */ 2333 RAL_WRITE(sc, RT2661_RX_BASE_CSR, sc->rxq.physaddr); 2334 2335 /* initialize Tx rings sizes */ 2336 RAL_WRITE(sc, RT2661_TX_RING_CSR0, 2337 RT2661_TX_RING_COUNT << 24 | 2338 RT2661_TX_RING_COUNT << 16 | 2339 RT2661_TX_RING_COUNT << 8 | 2340 RT2661_TX_RING_COUNT); 2341 2342 RAL_WRITE(sc, RT2661_TX_RING_CSR1, 2343 RT2661_TX_DESC_WSIZE << 16 | 2344 RT2661_TX_RING_COUNT << 8 | /* XXX: HCCA ring unused */ 2345 RT2661_MGT_RING_COUNT); 2346 2347 /* initialize Rx rings */ 2348 RAL_WRITE(sc, RT2661_RX_RING_CSR, 2349 RT2661_RX_DESC_BACK << 16 | 2350 RT2661_RX_DESC_WSIZE << 8 | 2351 RT2661_RX_RING_COUNT); 2352 2353 /* XXX: some magic here */ 2354 RAL_WRITE(sc, RT2661_TX_DMA_DST_CSR, 0xaa); 2355 2356 /* load base addresses of all 5 Tx rings (4 data + 1 mgt) */ 2357 RAL_WRITE(sc, RT2661_LOAD_TX_RING_CSR, 0x1f); 2358 2359 /* load base address of Rx ring */ 2360 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 2); 2361 2362 /* initialize MAC registers to default values */ 2363 for (i = 0; i < N(rt2661_def_mac); i++) 2364 RAL_WRITE(sc, rt2661_def_mac[i].reg, rt2661_def_mac[i].val); 2365 2366 rt2661_set_macaddr(sc, IF_LLADDR(ifp)); 2367 2368 /* set host ready */ 2369 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2370 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2371 2372 /* wait for BBP/RF to wakeup */ 2373 for (ntries = 0; ntries < 1000; ntries++) { 2374 if (RAL_READ(sc, RT2661_MAC_CSR12) & 8) 2375 break; 2376 DELAY(1000); 2377 } 2378 if (ntries == 1000) { 2379 printf("timeout waiting for BBP/RF to wakeup\n"); 2380 rt2661_stop_locked(sc); 2381 return; 2382 } 2383 2384 if (rt2661_bbp_init(sc) != 0) { 2385 rt2661_stop_locked(sc); 2386 return; 2387 } 2388 2389 /* select default channel */ 2390 sc->sc_curchan = ic->ic_curchan; 2391 rt2661_select_band(sc, sc->sc_curchan); 2392 rt2661_select_antenna(sc); 2393 rt2661_set_chan(sc, sc->sc_curchan); 2394 2395 /* update Rx filter */ 2396 tmp = RAL_READ(sc, RT2661_TXRX_CSR0) & 0xffff; 2397 2398 tmp |= RT2661_DROP_PHY_ERROR | RT2661_DROP_CRC_ERROR; 2399 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2400 tmp |= RT2661_DROP_CTL | RT2661_DROP_VER_ERROR | 2401 RT2661_DROP_ACKCTS; 2402 if (ic->ic_opmode != IEEE80211_M_HOSTAP && 2403 ic->ic_opmode != IEEE80211_M_MBSS) 2404 tmp |= RT2661_DROP_TODS; 2405 if (!(ifp->if_flags & IFF_PROMISC)) 2406 tmp |= RT2661_DROP_NOT_TO_ME; 2407 } 2408 2409 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2410 2411 /* clear STA registers */ 2412 RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, N(sta)); 2413 2414 /* initialize ASIC */ 2415 RAL_WRITE(sc, RT2661_MAC_CSR1, 4); 2416 2417 /* clear any pending interrupt */ 2418 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2419 2420 /* enable interrupts */ 2421 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 2422 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 2423 2424 /* kick Rx */ 2425 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 1); 2426 2427 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2428 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2429 2430 callout_reset(&sc->watchdog_ch, hz, rt2661_watchdog, sc); 2431 #undef N 2432 } 2433 2434 static void 2435 rt2661_init(void *priv) 2436 { 2437 struct rt2661_softc *sc = priv; 2438 struct ifnet *ifp = sc->sc_ifp; 2439 struct ieee80211com *ic = ifp->if_l2com; 2440 2441 RAL_LOCK(sc); 2442 rt2661_init_locked(sc); 2443 RAL_UNLOCK(sc); 2444 2445 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2446 ieee80211_start_all(ic); /* start all vap's */ 2447 } 2448 2449 void 2450 rt2661_stop_locked(struct rt2661_softc *sc) 2451 { 2452 struct ifnet *ifp = sc->sc_ifp; 2453 uint32_t tmp; 2454 volatile int *flags = &sc->sc_flags; 2455 2456 while (*flags & RAL_INPUT_RUNNING) 2457 msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10); 2458 2459 callout_stop(&sc->watchdog_ch); 2460 sc->sc_tx_timer = 0; 2461 2462 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 2463 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2464 2465 /* abort Tx (for all 5 Tx rings) */ 2466 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 0x1f << 16); 2467 2468 /* disable Rx (value remains after reset!) */ 2469 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2470 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2471 2472 /* reset ASIC */ 2473 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2474 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2475 2476 /* disable interrupts */ 2477 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffffff); 2478 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 2479 2480 /* clear any pending interrupt */ 2481 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2482 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, 0xffffffff); 2483 2484 /* reset Tx and Rx rings */ 2485 rt2661_reset_tx_ring(sc, &sc->txq[0]); 2486 rt2661_reset_tx_ring(sc, &sc->txq[1]); 2487 rt2661_reset_tx_ring(sc, &sc->txq[2]); 2488 rt2661_reset_tx_ring(sc, &sc->txq[3]); 2489 rt2661_reset_tx_ring(sc, &sc->mgtq); 2490 rt2661_reset_rx_ring(sc, &sc->rxq); 2491 } 2492 } 2493 2494 void 2495 rt2661_stop(void *priv) 2496 { 2497 struct rt2661_softc *sc = priv; 2498 2499 RAL_LOCK(sc); 2500 rt2661_stop_locked(sc); 2501 RAL_UNLOCK(sc); 2502 } 2503 2504 static int 2505 rt2661_load_microcode(struct rt2661_softc *sc) 2506 { 2507 struct ifnet *ifp = sc->sc_ifp; 2508 const struct firmware *fp; 2509 const char *imagename; 2510 int ntries, error; 2511 2512 RAL_LOCK_ASSERT(sc); 2513 2514 switch (sc->sc_id) { 2515 case 0x0301: imagename = "rt2561sfw"; break; 2516 case 0x0302: imagename = "rt2561fw"; break; 2517 case 0x0401: imagename = "rt2661fw"; break; 2518 default: 2519 if_printf(ifp, "%s: unexpected pci device id 0x%x, " 2520 "don't know how to retrieve firmware\n", 2521 __func__, sc->sc_id); 2522 return EINVAL; 2523 } 2524 RAL_UNLOCK(sc); 2525 fp = firmware_get(imagename); 2526 RAL_LOCK(sc); 2527 if (fp == NULL) { 2528 if_printf(ifp, "%s: unable to retrieve firmware image %s\n", 2529 __func__, imagename); 2530 return EINVAL; 2531 } 2532 2533 /* 2534 * Load 8051 microcode into NIC. 2535 */ 2536 /* reset 8051 */ 2537 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2538 2539 /* cancel any pending Host to MCU command */ 2540 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0); 2541 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 2542 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, 0); 2543 2544 /* write 8051's microcode */ 2545 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET | RT2661_MCU_SEL); 2546 RAL_WRITE_REGION_1(sc, RT2661_MCU_CODE_BASE, fp->data, fp->datasize); 2547 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2548 2549 /* kick 8051's ass */ 2550 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, 0); 2551 2552 /* wait for 8051 to initialize */ 2553 for (ntries = 0; ntries < 500; ntries++) { 2554 if (RAL_READ(sc, RT2661_MCU_CNTL_CSR) & RT2661_MCU_READY) 2555 break; 2556 DELAY(100); 2557 } 2558 if (ntries == 500) { 2559 if_printf(ifp, "%s: timeout waiting for MCU to initialize\n", 2560 __func__); 2561 error = EIO; 2562 } else 2563 error = 0; 2564 2565 firmware_put(fp, FIRMWARE_UNLOAD); 2566 return error; 2567 } 2568 2569 #ifdef notyet 2570 /* 2571 * Dynamically tune Rx sensitivity (BBP register 17) based on average RSSI and 2572 * false CCA count. This function is called periodically (every seconds) when 2573 * in the RUN state. Values taken from the reference driver. 2574 */ 2575 static void 2576 rt2661_rx_tune(struct rt2661_softc *sc) 2577 { 2578 uint8_t bbp17; 2579 uint16_t cca; 2580 int lo, hi, dbm; 2581 2582 /* 2583 * Tuning range depends on operating band and on the presence of an 2584 * external low-noise amplifier. 2585 */ 2586 lo = 0x20; 2587 if (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan)) 2588 lo += 0x08; 2589 if ((IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan) && sc->ext_2ghz_lna) || 2590 (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan) && sc->ext_5ghz_lna)) 2591 lo += 0x10; 2592 hi = lo + 0x20; 2593 2594 /* retrieve false CCA count since last call (clear on read) */ 2595 cca = RAL_READ(sc, RT2661_STA_CSR1) & 0xffff; 2596 2597 if (dbm >= -35) { 2598 bbp17 = 0x60; 2599 } else if (dbm >= -58) { 2600 bbp17 = hi; 2601 } else if (dbm >= -66) { 2602 bbp17 = lo + 0x10; 2603 } else if (dbm >= -74) { 2604 bbp17 = lo + 0x08; 2605 } else { 2606 /* RSSI < -74dBm, tune using false CCA count */ 2607 2608 bbp17 = sc->bbp17; /* current value */ 2609 2610 hi -= 2 * (-74 - dbm); 2611 if (hi < lo) 2612 hi = lo; 2613 2614 if (bbp17 > hi) { 2615 bbp17 = hi; 2616 2617 } else if (cca > 512) { 2618 if (++bbp17 > hi) 2619 bbp17 = hi; 2620 } else if (cca < 100) { 2621 if (--bbp17 < lo) 2622 bbp17 = lo; 2623 } 2624 } 2625 2626 if (bbp17 != sc->bbp17) { 2627 rt2661_bbp_write(sc, 17, bbp17); 2628 sc->bbp17 = bbp17; 2629 } 2630 } 2631 2632 /* 2633 * Enter/Leave radar detection mode. 2634 * This is for 802.11h additional regulatory domains. 2635 */ 2636 static void 2637 rt2661_radar_start(struct rt2661_softc *sc) 2638 { 2639 uint32_t tmp; 2640 2641 /* disable Rx */ 2642 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2643 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2644 2645 rt2661_bbp_write(sc, 82, 0x20); 2646 rt2661_bbp_write(sc, 83, 0x00); 2647 rt2661_bbp_write(sc, 84, 0x40); 2648 2649 /* save current BBP registers values */ 2650 sc->bbp18 = rt2661_bbp_read(sc, 18); 2651 sc->bbp21 = rt2661_bbp_read(sc, 21); 2652 sc->bbp22 = rt2661_bbp_read(sc, 22); 2653 sc->bbp16 = rt2661_bbp_read(sc, 16); 2654 sc->bbp17 = rt2661_bbp_read(sc, 17); 2655 sc->bbp64 = rt2661_bbp_read(sc, 64); 2656 2657 rt2661_bbp_write(sc, 18, 0xff); 2658 rt2661_bbp_write(sc, 21, 0x3f); 2659 rt2661_bbp_write(sc, 22, 0x3f); 2660 rt2661_bbp_write(sc, 16, 0xbd); 2661 rt2661_bbp_write(sc, 17, sc->ext_5ghz_lna ? 0x44 : 0x34); 2662 rt2661_bbp_write(sc, 64, 0x21); 2663 2664 /* restore Rx filter */ 2665 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2666 } 2667 2668 static int 2669 rt2661_radar_stop(struct rt2661_softc *sc) 2670 { 2671 uint8_t bbp66; 2672 2673 /* read radar detection result */ 2674 bbp66 = rt2661_bbp_read(sc, 66); 2675 2676 /* restore BBP registers values */ 2677 rt2661_bbp_write(sc, 16, sc->bbp16); 2678 rt2661_bbp_write(sc, 17, sc->bbp17); 2679 rt2661_bbp_write(sc, 18, sc->bbp18); 2680 rt2661_bbp_write(sc, 21, sc->bbp21); 2681 rt2661_bbp_write(sc, 22, sc->bbp22); 2682 rt2661_bbp_write(sc, 64, sc->bbp64); 2683 2684 return bbp66 == 1; 2685 } 2686 #endif 2687 2688 static int 2689 rt2661_prepare_beacon(struct rt2661_softc *sc, struct ieee80211vap *vap) 2690 { 2691 struct ieee80211com *ic = vap->iv_ic; 2692 struct ieee80211_beacon_offsets bo; 2693 struct rt2661_tx_desc desc; 2694 struct mbuf *m0; 2695 int rate; 2696 2697 m0 = ieee80211_beacon_alloc(vap->iv_bss, &bo); 2698 if (m0 == NULL) { 2699 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2700 return ENOBUFS; 2701 } 2702 2703 /* send beacons at the lowest available rate */ 2704 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_bsschan) ? 12 : 2; 2705 2706 rt2661_setup_tx_desc(sc, &desc, RT2661_TX_TIMESTAMP, RT2661_TX_HWSEQ, 2707 m0->m_pkthdr.len, rate, NULL, 0, RT2661_QID_MGT); 2708 2709 /* copy the first 24 bytes of Tx descriptor into NIC memory */ 2710 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0, (uint8_t *)&desc, 24); 2711 2712 /* copy beacon header and payload into NIC memory */ 2713 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0 + 24, 2714 mtod(m0, uint8_t *), m0->m_pkthdr.len); 2715 2716 m_freem(m0); 2717 2718 return 0; 2719 } 2720 2721 /* 2722 * Enable TSF synchronization and tell h/w to start sending beacons for IBSS 2723 * and HostAP operating modes. 2724 */ 2725 static void 2726 rt2661_enable_tsf_sync(struct rt2661_softc *sc) 2727 { 2728 struct ifnet *ifp = sc->sc_ifp; 2729 struct ieee80211com *ic = ifp->if_l2com; 2730 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2731 uint32_t tmp; 2732 2733 if (vap->iv_opmode != IEEE80211_M_STA) { 2734 /* 2735 * Change default 16ms TBTT adjustment to 8ms. 2736 * Must be done before enabling beacon generation. 2737 */ 2738 RAL_WRITE(sc, RT2661_TXRX_CSR10, 1 << 12 | 8); 2739 } 2740 2741 tmp = RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000; 2742 2743 /* set beacon interval (in 1/16ms unit) */ 2744 tmp |= vap->iv_bss->ni_intval * 16; 2745 2746 tmp |= RT2661_TSF_TICKING | RT2661_ENABLE_TBTT; 2747 if (vap->iv_opmode == IEEE80211_M_STA) 2748 tmp |= RT2661_TSF_MODE(1); 2749 else 2750 tmp |= RT2661_TSF_MODE(2) | RT2661_GENERATE_BEACON; 2751 2752 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp); 2753 } 2754 2755 static void 2756 rt2661_enable_tsf(struct rt2661_softc *sc) 2757 { 2758 RAL_WRITE(sc, RT2661_TXRX_CSR9, 2759 (RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000) 2760 | RT2661_TSF_TICKING | RT2661_TSF_MODE(2)); 2761 } 2762 2763 /* 2764 * Retrieve the "Received Signal Strength Indicator" from the raw values 2765 * contained in Rx descriptors. The computation depends on which band the 2766 * frame was received. Correction values taken from the reference driver. 2767 */ 2768 static int 2769 rt2661_get_rssi(struct rt2661_softc *sc, uint8_t raw) 2770 { 2771 int lna, agc, rssi; 2772 2773 lna = (raw >> 5) & 0x3; 2774 agc = raw & 0x1f; 2775 2776 if (lna == 0) { 2777 /* 2778 * No mapping available. 2779 * 2780 * NB: Since RSSI is relative to noise floor, -1 is 2781 * adequate for caller to know error happened. 2782 */ 2783 return -1; 2784 } 2785 2786 rssi = (2 * agc) - RT2661_NOISE_FLOOR; 2787 2788 if (IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan)) { 2789 rssi += sc->rssi_2ghz_corr; 2790 2791 if (lna == 1) 2792 rssi -= 64; 2793 else if (lna == 2) 2794 rssi -= 74; 2795 else if (lna == 3) 2796 rssi -= 90; 2797 } else { 2798 rssi += sc->rssi_5ghz_corr; 2799 2800 if (lna == 1) 2801 rssi -= 64; 2802 else if (lna == 2) 2803 rssi -= 86; 2804 else if (lna == 3) 2805 rssi -= 100; 2806 } 2807 return rssi; 2808 } 2809 2810 static void 2811 rt2661_scan_start(struct ieee80211com *ic) 2812 { 2813 struct ifnet *ifp = ic->ic_ifp; 2814 struct rt2661_softc *sc = ifp->if_softc; 2815 uint32_t tmp; 2816 2817 /* abort TSF synchronization */ 2818 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 2819 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0xffffff); 2820 rt2661_set_bssid(sc, ifp->if_broadcastaddr); 2821 } 2822 2823 static void 2824 rt2661_scan_end(struct ieee80211com *ic) 2825 { 2826 struct ifnet *ifp = ic->ic_ifp; 2827 struct rt2661_softc *sc = ifp->if_softc; 2828 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 2829 2830 rt2661_enable_tsf_sync(sc); 2831 /* XXX keep local copy */ 2832 rt2661_set_bssid(sc, vap->iv_bss->ni_bssid); 2833 } 2834 2835 static void 2836 rt2661_set_channel(struct ieee80211com *ic) 2837 { 2838 struct ifnet *ifp = ic->ic_ifp; 2839 struct rt2661_softc *sc = ifp->if_softc; 2840 2841 RAL_LOCK(sc); 2842 rt2661_set_chan(sc, ic->ic_curchan); 2843 RAL_UNLOCK(sc); 2844 2845 } 2846