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/module.h> 37 #include <sys/bus.h> 38 #include <sys/endian.h> 39 40 #include <machine/bus.h> 41 #include <machine/resource.h> 42 #include <machine/clock.h> 43 #include <sys/rman.h> 44 45 #include <net/bpf.h> 46 #include <net/if.h> 47 #include <net/if_arp.h> 48 #include <net/ethernet.h> 49 #include <net/if_dl.h> 50 #include <net/if_media.h> 51 #include <net/if_types.h> 52 53 #include <net80211/ieee80211_var.h> 54 #include <net80211/ieee80211_radiotap.h> 55 56 #include <netinet/in.h> 57 #include <netinet/in_systm.h> 58 #include <netinet/in_var.h> 59 #include <netinet/ip.h> 60 #include <netinet/if_ether.h> 61 62 #include <dev/ral/if_ralrate.h> 63 #include <dev/ral/rt2661reg.h> 64 #include <dev/ral/rt2661var.h> 65 #include <dev/ral/rt2661_ucode.h> 66 67 #ifdef RAL_DEBUG 68 #define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 69 #define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 70 int ral_debug = 0; 71 SYSCTL_INT(_debug, OID_AUTO, ral, CTLFLAG_RW, &ral_debug, 0, "ral debug level"); 72 #else 73 #define DPRINTF(x) 74 #define DPRINTFN(n, x) 75 #endif 76 77 static void rt2661_dma_map_addr(void *, bus_dma_segment_t *, int, 78 int); 79 static int rt2661_alloc_tx_ring(struct rt2661_softc *, 80 struct rt2661_tx_ring *, int); 81 static void rt2661_reset_tx_ring(struct rt2661_softc *, 82 struct rt2661_tx_ring *); 83 static void rt2661_free_tx_ring(struct rt2661_softc *, 84 struct rt2661_tx_ring *); 85 static int rt2661_alloc_rx_ring(struct rt2661_softc *, 86 struct rt2661_rx_ring *, int); 87 static void rt2661_reset_rx_ring(struct rt2661_softc *, 88 struct rt2661_rx_ring *); 89 static void rt2661_free_rx_ring(struct rt2661_softc *, 90 struct rt2661_rx_ring *); 91 static struct ieee80211_node *rt2661_node_alloc( 92 struct ieee80211_node_table *); 93 static int rt2661_media_change(struct ifnet *); 94 static void rt2661_next_scan(void *); 95 static int rt2661_newstate(struct ieee80211com *, 96 enum ieee80211_state, int); 97 static uint16_t rt2661_eeprom_read(struct rt2661_softc *, uint8_t); 98 static void rt2661_rx_intr(struct rt2661_softc *); 99 static void rt2661_tx_intr(struct rt2661_softc *); 100 static void rt2661_tx_dma_intr(struct rt2661_softc *, 101 struct rt2661_tx_ring *); 102 static void rt2661_mcu_beacon_expire(struct rt2661_softc *); 103 static void rt2661_mcu_wakeup(struct rt2661_softc *); 104 static void rt2661_mcu_cmd_intr(struct rt2661_softc *); 105 static int rt2661_ack_rate(struct ieee80211com *, int); 106 static uint16_t rt2661_txtime(int, int, uint32_t); 107 static uint8_t rt2661_rxrate(struct rt2661_rx_desc *); 108 static uint8_t rt2661_plcp_signal(int); 109 static void rt2661_setup_tx_desc(struct rt2661_softc *, 110 struct rt2661_tx_desc *, uint32_t, uint16_t, int, 111 int, const bus_dma_segment_t *, int, int); 112 static struct mbuf * rt2661_get_rts(struct rt2661_softc *, 113 struct ieee80211_frame *, uint16_t); 114 static int rt2661_tx_data(struct rt2661_softc *, struct mbuf *, 115 struct ieee80211_node *, int); 116 static int rt2661_tx_mgt(struct rt2661_softc *, struct mbuf *, 117 struct ieee80211_node *); 118 static void rt2661_start(struct ifnet *); 119 static void rt2661_watchdog(struct ifnet *); 120 static int rt2661_reset(struct ifnet *); 121 static int rt2661_ioctl(struct ifnet *, u_long, caddr_t); 122 static void rt2661_bbp_write(struct rt2661_softc *, uint8_t, 123 uint8_t); 124 static uint8_t rt2661_bbp_read(struct rt2661_softc *, uint8_t); 125 static void rt2661_rf_write(struct rt2661_softc *, uint8_t, 126 uint32_t); 127 static int rt2661_tx_cmd(struct rt2661_softc *, uint8_t, 128 uint16_t); 129 static void rt2661_select_antenna(struct rt2661_softc *); 130 static void rt2661_enable_mrr(struct rt2661_softc *); 131 static void rt2661_set_txpreamble(struct rt2661_softc *); 132 static void rt2661_set_basicrates(struct rt2661_softc *, 133 const struct ieee80211_rateset *); 134 static void rt2661_select_band(struct rt2661_softc *, 135 struct ieee80211_channel *); 136 static void rt2661_set_chan(struct rt2661_softc *, 137 struct ieee80211_channel *); 138 static void rt2661_set_bssid(struct rt2661_softc *, 139 const uint8_t *); 140 static void rt2661_set_macaddr(struct rt2661_softc *, 141 const uint8_t *); 142 static void rt2661_update_promisc(struct rt2661_softc *); 143 static int rt2661_wme_update(struct ieee80211com *) __unused; 144 static void rt2661_update_slot(struct ifnet *); 145 static const char *rt2661_get_rf(int); 146 static void rt2661_read_eeprom(struct rt2661_softc *); 147 static int rt2661_bbp_init(struct rt2661_softc *); 148 static void rt2661_init(void *); 149 static void rt2661_stop(void *); 150 static int rt2661_load_microcode(struct rt2661_softc *, 151 const uint8_t *, int); 152 #ifdef notyet 153 static void rt2661_rx_tune(struct rt2661_softc *); 154 static void rt2661_radar_start(struct rt2661_softc *); 155 static int rt2661_radar_stop(struct rt2661_softc *); 156 #endif 157 static int rt2661_prepare_beacon(struct rt2661_softc *); 158 static void rt2661_enable_tsf_sync(struct rt2661_softc *); 159 static int rt2661_get_rssi(struct rt2661_softc *, uint8_t); 160 161 /* 162 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 163 */ 164 static const struct ieee80211_rateset rt2661_rateset_11a = 165 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 166 167 static const struct ieee80211_rateset rt2661_rateset_11b = 168 { 4, { 2, 4, 11, 22 } }; 169 170 static const struct ieee80211_rateset rt2661_rateset_11g = 171 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 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 struct ifnet *ifp; 202 uint32_t val; 203 const uint8_t *ucode = NULL; 204 int error, i, ac, ntries, size = 0; 205 206 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(&sc->scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 212 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 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); 229 230 device_printf(dev, "MAC/BBP RT%X, RF %s\n", val, 231 rt2661_get_rf(sc->rf_rev)); 232 233 /* 234 * Load 8051 microcode into NIC. 235 */ 236 switch (id) { 237 case 0x0301: 238 ucode = rt2561s_ucode; 239 size = sizeof rt2561s_ucode; 240 break; 241 case 0x0302: 242 ucode = rt2561_ucode; 243 size = sizeof rt2561_ucode; 244 break; 245 case 0x0401: 246 ucode = rt2661_ucode; 247 size = sizeof rt2661_ucode; 248 break; 249 } 250 251 error = rt2661_load_microcode(sc, ucode, size); 252 if (error != 0) { 253 device_printf(sc->sc_dev, "could not load 8051 microcode\n"); 254 goto fail1; 255 } 256 257 /* 258 * Allocate Tx and Rx rings. 259 */ 260 for (ac = 0; ac < 4; ac++) { 261 error = rt2661_alloc_tx_ring(sc, &sc->txq[ac], 262 RT2661_TX_RING_COUNT); 263 if (error != 0) { 264 device_printf(sc->sc_dev, 265 "could not allocate Tx ring %d\n", ac); 266 goto fail2; 267 } 268 } 269 270 error = rt2661_alloc_tx_ring(sc, &sc->mgtq, RT2661_MGT_RING_COUNT); 271 if (error != 0) { 272 device_printf(sc->sc_dev, "could not allocate Mgt ring\n"); 273 goto fail2; 274 } 275 276 error = rt2661_alloc_rx_ring(sc, &sc->rxq, RT2661_RX_RING_COUNT); 277 if (error != 0) { 278 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 279 goto fail3; 280 } 281 282 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 283 if (ifp == NULL) { 284 device_printf(sc->sc_dev, "can not if_alloc()\n"); 285 error = ENOMEM; 286 goto fail4; 287 } 288 289 ifp->if_softc = sc; 290 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 291 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 292 ifp->if_init = rt2661_init; 293 ifp->if_ioctl = rt2661_ioctl; 294 ifp->if_start = rt2661_start; 295 ifp->if_watchdog = rt2661_watchdog; 296 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 297 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 298 IFQ_SET_READY(&ifp->if_snd); 299 300 ic->ic_ifp = ifp; 301 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 302 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 303 ic->ic_state = IEEE80211_S_INIT; 304 305 /* set device capabilities */ 306 ic->ic_caps = 307 IEEE80211_C_IBSS | /* IBSS mode supported */ 308 IEEE80211_C_MONITOR | /* monitor mode supported */ 309 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 310 IEEE80211_C_TXPMGT | /* tx power management */ 311 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 312 IEEE80211_C_SHSLOT | /* short slot time supported */ 313 #ifdef notyet 314 IEEE80211_C_WME | /* 802.11e */ 315 #endif 316 IEEE80211_C_WPA; /* 802.11i */ 317 318 if (sc->rf_rev == RT2661_RF_5225 || sc->rf_rev == RT2661_RF_5325) { 319 /* set supported .11a rates */ 320 ic->ic_sup_rates[IEEE80211_MODE_11A] = rt2661_rateset_11a; 321 322 /* set supported .11a channels */ 323 for (i = 36; i <= 64; i += 4) { 324 ic->ic_channels[i].ic_freq = 325 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 326 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 327 } 328 for (i = 100; i <= 140; i += 4) { 329 ic->ic_channels[i].ic_freq = 330 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 331 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 332 } 333 for (i = 149; i <= 165; i += 4) { 334 ic->ic_channels[i].ic_freq = 335 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 336 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 337 } 338 } 339 340 /* set supported .11b and .11g rates */ 341 ic->ic_sup_rates[IEEE80211_MODE_11B] = rt2661_rateset_11b; 342 ic->ic_sup_rates[IEEE80211_MODE_11G] = rt2661_rateset_11g; 343 344 /* set supported .11b and .11g channels (1 through 14) */ 345 for (i = 1; i <= 14; i++) { 346 ic->ic_channels[i].ic_freq = 347 ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ); 348 ic->ic_channels[i].ic_flags = 349 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 350 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 351 } 352 353 ieee80211_ifattach(ic); 354 ic->ic_node_alloc = rt2661_node_alloc; 355 /* ic->ic_wme.wme_update = rt2661_wme_update;*/ 356 ic->ic_updateslot = rt2661_update_slot; 357 ic->ic_reset = rt2661_reset; 358 /* enable s/w bmiss handling in sta mode */ 359 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 360 361 /* override state transition machine */ 362 sc->sc_newstate = ic->ic_newstate; 363 ic->ic_newstate = rt2661_newstate; 364 ieee80211_media_init(ic, rt2661_media_change, ieee80211_media_status); 365 366 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 367 sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf); 368 369 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 370 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 371 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2661_RX_RADIOTAP_PRESENT); 372 373 sc->sc_txtap_len = sizeof sc->sc_txtapu; 374 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 375 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2661_TX_RADIOTAP_PRESENT); 376 377 /* 378 * Add a few sysctl knobs. 379 */ 380 sc->dwelltime = 200; 381 382 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 383 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 384 CTLFLAG_RW, &sc->dwelltime, 0, 385 "channel dwell time (ms) for AP/station scanning"); 386 387 if (bootverbose) 388 ieee80211_announce(ic); 389 390 return 0; 391 392 fail4: rt2661_free_rx_ring(sc, &sc->rxq); 393 fail3: rt2661_free_tx_ring(sc, &sc->mgtq); 394 fail2: while (--ac >= 0) 395 rt2661_free_tx_ring(sc, &sc->txq[ac]); 396 fail1: mtx_destroy(&sc->sc_mtx); 397 398 return error; 399 } 400 401 int 402 rt2661_detach(void *xsc) 403 { 404 struct rt2661_softc *sc = xsc; 405 struct ieee80211com *ic = &sc->sc_ic; 406 struct ifnet *ifp = ic->ic_ifp; 407 408 rt2661_stop(sc); 409 callout_stop(&sc->scan_ch); 410 callout_stop(&sc->rssadapt_ch); 411 412 bpfdetach(ifp); 413 ieee80211_ifdetach(ic); 414 415 rt2661_free_tx_ring(sc, &sc->txq[0]); 416 rt2661_free_tx_ring(sc, &sc->txq[1]); 417 rt2661_free_tx_ring(sc, &sc->txq[2]); 418 rt2661_free_tx_ring(sc, &sc->txq[3]); 419 rt2661_free_tx_ring(sc, &sc->mgtq); 420 rt2661_free_rx_ring(sc, &sc->rxq); 421 422 if_free(ifp); 423 424 mtx_destroy(&sc->sc_mtx); 425 426 return 0; 427 } 428 429 void 430 rt2661_shutdown(void *xsc) 431 { 432 struct rt2661_softc *sc = xsc; 433 434 rt2661_stop(sc); 435 } 436 437 void 438 rt2661_suspend(void *xsc) 439 { 440 struct rt2661_softc *sc = xsc; 441 442 rt2661_stop(sc); 443 } 444 445 void 446 rt2661_resume(void *xsc) 447 { 448 struct rt2661_softc *sc = xsc; 449 struct ifnet *ifp = sc->sc_ic.ic_ifp; 450 451 if (ifp->if_flags & IFF_UP) { 452 ifp->if_init(ifp->if_softc); 453 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 454 ifp->if_start(ifp); 455 } 456 } 457 458 static void 459 rt2661_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 460 { 461 if (error != 0) 462 return; 463 464 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 465 466 *(bus_addr_t *)arg = segs[0].ds_addr; 467 } 468 469 static int 470 rt2661_alloc_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring, 471 int count) 472 { 473 int i, error; 474 475 ring->count = count; 476 ring->queued = 0; 477 ring->cur = ring->next = ring->stat = 0; 478 479 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 480 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2661_TX_DESC_SIZE, 1, 481 count * RT2661_TX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 482 if (error != 0) { 483 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 484 goto fail; 485 } 486 487 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 488 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 489 if (error != 0) { 490 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 491 goto fail; 492 } 493 494 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 495 count * RT2661_TX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 496 0); 497 if (error != 0) { 498 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 499 goto fail; 500 } 501 502 ring->data = malloc(count * sizeof (struct rt2661_tx_data), M_DEVBUF, 503 M_NOWAIT | M_ZERO); 504 if (ring->data == NULL) { 505 device_printf(sc->sc_dev, "could not allocate soft data\n"); 506 error = ENOMEM; 507 goto fail; 508 } 509 510 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 511 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2661_MAX_SCATTER, 512 MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 513 if (error != 0) { 514 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 515 goto fail; 516 } 517 518 for (i = 0; i < count; i++) { 519 error = bus_dmamap_create(ring->data_dmat, 0, 520 &ring->data[i].map); 521 if (error != 0) { 522 device_printf(sc->sc_dev, "could not create DMA map\n"); 523 goto fail; 524 } 525 } 526 527 return 0; 528 529 fail: rt2661_free_tx_ring(sc, ring); 530 return error; 531 } 532 533 static void 534 rt2661_reset_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 535 { 536 struct rt2661_tx_desc *desc; 537 struct rt2661_tx_data *data; 538 int i; 539 540 for (i = 0; i < ring->count; i++) { 541 desc = &ring->desc[i]; 542 data = &ring->data[i]; 543 544 if (data->m != NULL) { 545 bus_dmamap_sync(ring->data_dmat, data->map, 546 BUS_DMASYNC_POSTWRITE); 547 bus_dmamap_unload(ring->data_dmat, data->map); 548 m_freem(data->m); 549 data->m = NULL; 550 } 551 552 if (data->ni != NULL) { 553 ieee80211_free_node(data->ni); 554 data->ni = NULL; 555 } 556 557 desc->flags = 0; 558 } 559 560 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 561 562 ring->queued = 0; 563 ring->cur = ring->next = ring->stat = 0; 564 } 565 566 static void 567 rt2661_free_tx_ring(struct rt2661_softc *sc, struct rt2661_tx_ring *ring) 568 { 569 struct rt2661_tx_data *data; 570 int i; 571 572 if (ring->desc != NULL) { 573 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 574 BUS_DMASYNC_POSTWRITE); 575 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 576 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 577 } 578 579 if (ring->desc_dmat != NULL) 580 bus_dma_tag_destroy(ring->desc_dmat); 581 582 if (ring->data != NULL) { 583 for (i = 0; i < ring->count; i++) { 584 data = &ring->data[i]; 585 586 if (data->m != NULL) { 587 bus_dmamap_sync(ring->data_dmat, data->map, 588 BUS_DMASYNC_POSTWRITE); 589 bus_dmamap_unload(ring->data_dmat, data->map); 590 m_freem(data->m); 591 } 592 593 if (data->ni != NULL) 594 ieee80211_free_node(data->ni); 595 596 if (data->map != NULL) 597 bus_dmamap_destroy(ring->data_dmat, data->map); 598 } 599 600 free(ring->data, M_DEVBUF); 601 } 602 603 if (ring->data_dmat != NULL) 604 bus_dma_tag_destroy(ring->data_dmat); 605 } 606 607 static int 608 rt2661_alloc_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring, 609 int count) 610 { 611 struct rt2661_rx_desc *desc; 612 struct rt2661_rx_data *data; 613 bus_addr_t physaddr; 614 int i, error; 615 616 ring->count = count; 617 ring->cur = ring->next = 0; 618 619 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 620 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2661_RX_DESC_SIZE, 1, 621 count * RT2661_RX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 622 if (error != 0) { 623 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 624 goto fail; 625 } 626 627 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 628 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 629 if (error != 0) { 630 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 631 goto fail; 632 } 633 634 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 635 count * RT2661_RX_DESC_SIZE, rt2661_dma_map_addr, &ring->physaddr, 636 0); 637 if (error != 0) { 638 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 639 goto fail; 640 } 641 642 ring->data = malloc(count * sizeof (struct rt2661_rx_data), M_DEVBUF, 643 M_NOWAIT | M_ZERO); 644 if (ring->data == NULL) { 645 device_printf(sc->sc_dev, "could not allocate soft data\n"); 646 error = ENOMEM; 647 goto fail; 648 } 649 650 /* 651 * Pre-allocate Rx buffers and populate Rx ring. 652 */ 653 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 654 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, NULL, 655 NULL, &ring->data_dmat); 656 if (error != 0) { 657 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 658 goto fail; 659 } 660 661 for (i = 0; i < count; i++) { 662 desc = &sc->rxq.desc[i]; 663 data = &sc->rxq.data[i]; 664 665 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 666 if (error != 0) { 667 device_printf(sc->sc_dev, "could not create DMA map\n"); 668 goto fail; 669 } 670 671 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 672 if (data->m == NULL) { 673 device_printf(sc->sc_dev, 674 "could not allocate rx mbuf\n"); 675 error = ENOMEM; 676 goto fail; 677 } 678 679 error = bus_dmamap_load(ring->data_dmat, data->map, 680 mtod(data->m, void *), MCLBYTES, rt2661_dma_map_addr, 681 &physaddr, 0); 682 if (error != 0) { 683 device_printf(sc->sc_dev, 684 "could not load rx buf DMA map"); 685 goto fail; 686 } 687 688 desc->flags = htole32(RT2661_RX_BUSY); 689 desc->physaddr = htole32(physaddr); 690 } 691 692 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 693 694 return 0; 695 696 fail: rt2661_free_rx_ring(sc, ring); 697 return error; 698 } 699 700 static void 701 rt2661_reset_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 702 { 703 int i; 704 705 for (i = 0; i < ring->count; i++) 706 ring->desc[i].flags = htole32(RT2661_RX_BUSY); 707 708 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 709 710 ring->cur = ring->next = 0; 711 } 712 713 static void 714 rt2661_free_rx_ring(struct rt2661_softc *sc, struct rt2661_rx_ring *ring) 715 { 716 struct rt2661_rx_data *data; 717 int i; 718 719 if (ring->desc != NULL) { 720 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 721 BUS_DMASYNC_POSTWRITE); 722 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 723 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 724 } 725 726 if (ring->desc_dmat != NULL) 727 bus_dma_tag_destroy(ring->desc_dmat); 728 729 if (ring->data != NULL) { 730 for (i = 0; i < ring->count; i++) { 731 data = &ring->data[i]; 732 733 if (data->m != NULL) { 734 bus_dmamap_sync(ring->data_dmat, data->map, 735 BUS_DMASYNC_POSTREAD); 736 bus_dmamap_unload(ring->data_dmat, data->map); 737 m_freem(data->m); 738 } 739 740 if (data->map != NULL) 741 bus_dmamap_destroy(ring->data_dmat, data->map); 742 } 743 744 free(ring->data, M_DEVBUF); 745 } 746 747 if (ring->data_dmat != NULL) 748 bus_dma_tag_destroy(ring->data_dmat); 749 } 750 751 static struct ieee80211_node * 752 rt2661_node_alloc(struct ieee80211_node_table *nt) 753 { 754 struct rt2661_node *rn; 755 756 rn = malloc(sizeof (struct rt2661_node), M_80211_NODE, 757 M_NOWAIT | M_ZERO); 758 759 return (rn != NULL) ? &rn->ni : NULL; 760 } 761 762 static int 763 rt2661_media_change(struct ifnet *ifp) 764 { 765 struct rt2661_softc *sc = ifp->if_softc; 766 int error; 767 768 error = ieee80211_media_change(ifp); 769 if (error != ENETRESET) 770 return error; 771 772 if ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) 773 rt2661_init(sc); 774 775 return 0; 776 } 777 778 /* 779 * This function is called periodically (every 200ms) during scanning to 780 * switch from one channel to another. 781 */ 782 static void 783 rt2661_next_scan(void *arg) 784 { 785 struct rt2661_softc *sc = arg; 786 struct ieee80211com *ic = &sc->sc_ic; 787 788 if (ic->ic_state == IEEE80211_S_SCAN) 789 ieee80211_next_scan(ic); 790 } 791 792 /* 793 * This function is called for each node present in the node station table. 794 */ 795 static void 796 rt2661_iter_func(void *arg, struct ieee80211_node *ni) 797 { 798 struct rt2661_node *rn = (struct rt2661_node *)ni; 799 800 ral_rssadapt_updatestats(&rn->rssadapt); 801 } 802 803 /* 804 * This function is called periodically (every 100ms) in RUN state to update 805 * the rate adaptation statistics. 806 */ 807 static void 808 rt2661_update_rssadapt(void *arg) 809 { 810 struct rt2661_softc *sc = arg; 811 struct ieee80211com *ic = &sc->sc_ic; 812 813 RAL_LOCK(sc); 814 815 ieee80211_iterate_nodes(&ic->ic_sta, rt2661_iter_func, arg); 816 callout_reset(&sc->rssadapt_ch, hz / 10, rt2661_update_rssadapt, sc); 817 818 RAL_UNLOCK(sc); 819 } 820 821 static int 822 rt2661_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 823 { 824 struct rt2661_softc *sc = ic->ic_ifp->if_softc; 825 enum ieee80211_state ostate; 826 struct ieee80211_node *ni; 827 uint32_t tmp; 828 int error = 0; 829 830 ostate = ic->ic_state; 831 callout_stop(&sc->scan_ch); 832 833 switch (nstate) { 834 case IEEE80211_S_INIT: 835 callout_stop(&sc->rssadapt_ch); 836 837 if (ostate == IEEE80211_S_RUN) { 838 /* abort TSF synchronization */ 839 tmp = RAL_READ(sc, RT2661_TXRX_CSR9); 840 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp & ~0x00ffffff); 841 } 842 break; 843 844 case IEEE80211_S_SCAN: 845 rt2661_set_chan(sc, ic->ic_curchan); 846 callout_reset(&sc->scan_ch, (sc->dwelltime * hz) / 1000, 847 rt2661_next_scan, sc); 848 break; 849 850 case IEEE80211_S_AUTH: 851 case IEEE80211_S_ASSOC: 852 rt2661_set_chan(sc, ic->ic_curchan); 853 break; 854 855 case IEEE80211_S_RUN: 856 rt2661_set_chan(sc, ic->ic_curchan); 857 858 ni = ic->ic_bss; 859 860 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 861 rt2661_enable_mrr(sc); 862 rt2661_set_txpreamble(sc); 863 rt2661_set_basicrates(sc, &ni->ni_rates); 864 rt2661_set_bssid(sc, ni->ni_bssid); 865 } 866 867 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 868 ic->ic_opmode == IEEE80211_M_IBSS) { 869 if ((error = rt2661_prepare_beacon(sc)) != 0) 870 break; 871 } 872 873 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 874 callout_reset(&sc->rssadapt_ch, hz / 10, 875 rt2661_update_rssadapt, sc); 876 rt2661_enable_tsf_sync(sc); 877 } 878 break; 879 } 880 881 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 882 } 883 884 /* 885 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 886 * 93C66). 887 */ 888 static uint16_t 889 rt2661_eeprom_read(struct rt2661_softc *sc, uint8_t addr) 890 { 891 uint32_t tmp; 892 uint16_t val; 893 int n; 894 895 /* clock C once before the first command */ 896 RT2661_EEPROM_CTL(sc, 0); 897 898 RT2661_EEPROM_CTL(sc, RT2661_S); 899 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 900 RT2661_EEPROM_CTL(sc, RT2661_S); 901 902 /* write start bit (1) */ 903 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 904 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 905 906 /* write READ opcode (10) */ 907 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D); 908 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_D | RT2661_C); 909 RT2661_EEPROM_CTL(sc, RT2661_S); 910 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 911 912 /* write address (A5-A0 or A7-A0) */ 913 n = (RAL_READ(sc, RT2661_E2PROM_CSR) & RT2661_93C46) ? 5 : 7; 914 for (; n >= 0; n--) { 915 RT2661_EEPROM_CTL(sc, RT2661_S | 916 (((addr >> n) & 1) << RT2661_SHIFT_D)); 917 RT2661_EEPROM_CTL(sc, RT2661_S | 918 (((addr >> n) & 1) << RT2661_SHIFT_D) | RT2661_C); 919 } 920 921 RT2661_EEPROM_CTL(sc, RT2661_S); 922 923 /* read data Q15-Q0 */ 924 val = 0; 925 for (n = 15; n >= 0; n--) { 926 RT2661_EEPROM_CTL(sc, RT2661_S | RT2661_C); 927 tmp = RAL_READ(sc, RT2661_E2PROM_CSR); 928 val |= ((tmp & RT2661_Q) >> RT2661_SHIFT_Q) << n; 929 RT2661_EEPROM_CTL(sc, RT2661_S); 930 } 931 932 RT2661_EEPROM_CTL(sc, 0); 933 934 /* clear Chip Select and clock C */ 935 RT2661_EEPROM_CTL(sc, RT2661_S); 936 RT2661_EEPROM_CTL(sc, 0); 937 RT2661_EEPROM_CTL(sc, RT2661_C); 938 939 return val; 940 } 941 942 static void 943 rt2661_tx_intr(struct rt2661_softc *sc) 944 { 945 struct ieee80211com *ic = &sc->sc_ic; 946 struct ifnet *ifp = ic->ic_ifp; 947 struct rt2661_tx_ring *txq; 948 struct rt2661_tx_data *data; 949 struct rt2661_node *rn; 950 uint32_t val; 951 int qid, retrycnt; 952 953 for (;;) { 954 val = RAL_READ(sc, RT2661_STA_CSR4); 955 if (!(val & RT2661_TX_STAT_VALID)) 956 break; 957 958 /* retrieve the queue in which this frame was sent */ 959 qid = RT2661_TX_QID(val); 960 txq = (qid <= 3) ? &sc->txq[qid] : &sc->mgtq; 961 962 /* retrieve rate control algorithm context */ 963 data = &txq->data[txq->stat]; 964 rn = (struct rt2661_node *)data->ni; 965 966 switch (RT2661_TX_RESULT(val)) { 967 case RT2661_TX_SUCCESS: 968 retrycnt = RT2661_TX_RETRYCNT(val); 969 970 DPRINTFN(10, ("data frame sent successfully after " 971 "%d retries\n", retrycnt)); 972 if (retrycnt == 0 && data->id.id_node != NULL) { 973 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 974 &data->id); 975 } 976 ifp->if_opackets++; 977 break; 978 979 case RT2661_TX_RETRY_FAIL: 980 DPRINTFN(9, ("sending data frame failed (too much " 981 "retries)\n")); 982 if (data->id.id_node != NULL) { 983 ral_rssadapt_lower_rate(ic, data->ni, 984 &rn->rssadapt, &data->id); 985 } 986 ifp->if_oerrors++; 987 break; 988 989 default: 990 /* other failure */ 991 device_printf(sc->sc_dev, 992 "sending data frame failed 0x%08x\n", val); 993 ifp->if_oerrors++; 994 } 995 996 ieee80211_free_node(data->ni); 997 data->ni = NULL; 998 999 DPRINTFN(15, ("tx done q=%d idx=%u\n", qid, txq->stat)); 1000 1001 txq->queued--; 1002 if (++txq->stat >= txq->count) /* faster than % count */ 1003 txq->stat = 0; 1004 } 1005 1006 sc->sc_tx_timer = 0; 1007 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1008 rt2661_start(ifp); 1009 } 1010 1011 static void 1012 rt2661_tx_dma_intr(struct rt2661_softc *sc, struct rt2661_tx_ring *txq) 1013 { 1014 struct rt2661_tx_desc *desc; 1015 struct rt2661_tx_data *data; 1016 1017 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_POSTREAD); 1018 1019 for (;;) { 1020 desc = &txq->desc[txq->next]; 1021 data = &txq->data[txq->next]; 1022 1023 if ((le32toh(desc->flags) & RT2661_TX_BUSY) || 1024 !(le32toh(desc->flags) & RT2661_TX_VALID)) 1025 break; 1026 1027 bus_dmamap_sync(txq->data_dmat, data->map, 1028 BUS_DMASYNC_POSTWRITE); 1029 bus_dmamap_unload(txq->data_dmat, data->map); 1030 m_freem(data->m); 1031 data->m = NULL; 1032 /* node reference is released in rt2661_tx_intr() */ 1033 1034 /* descriptor is no longer valid */ 1035 desc->flags &= ~htole32(RT2661_TX_VALID); 1036 1037 DPRINTFN(15, ("tx dma done q=%p idx=%u\n", txq, txq->next)); 1038 1039 if (++txq->next >= txq->count) /* faster than % count */ 1040 txq->next = 0; 1041 } 1042 1043 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1044 } 1045 1046 static void 1047 rt2661_rx_intr(struct rt2661_softc *sc) 1048 { 1049 struct ieee80211com *ic = &sc->sc_ic; 1050 struct ifnet *ifp = ic->ic_ifp; 1051 struct rt2661_rx_desc *desc; 1052 struct rt2661_rx_data *data; 1053 bus_addr_t physaddr; 1054 struct ieee80211_frame *wh; 1055 struct ieee80211_node *ni; 1056 struct rt2661_node *rn; 1057 struct mbuf *mnew, *m; 1058 int error; 1059 1060 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1061 BUS_DMASYNC_POSTREAD); 1062 1063 for (;;) { 1064 desc = &sc->rxq.desc[sc->rxq.cur]; 1065 data = &sc->rxq.data[sc->rxq.cur]; 1066 1067 if (le32toh(desc->flags) & RT2661_RX_BUSY) 1068 break; 1069 1070 if ((le32toh(desc->flags) & RT2661_RX_PHY_ERROR) || 1071 (le32toh(desc->flags) & RT2661_RX_CRC_ERROR)) { 1072 /* 1073 * This should not happen since we did not request 1074 * to receive those frames when we filled TXRX_CSR0. 1075 */ 1076 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1077 le32toh(desc->flags))); 1078 ifp->if_ierrors++; 1079 goto skip; 1080 } 1081 1082 if ((le32toh(desc->flags) & RT2661_RX_CIPHER_MASK) != 0) { 1083 ifp->if_ierrors++; 1084 goto skip; 1085 } 1086 1087 /* 1088 * Try to allocate a new mbuf for this ring element and load it 1089 * before processing the current mbuf. If the ring element 1090 * cannot be loaded, drop the received packet and reuse the old 1091 * mbuf. In the unlikely case that the old mbuf can't be 1092 * reloaded either, explicitly panic. 1093 */ 1094 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1095 if (mnew == NULL) { 1096 ifp->if_ierrors++; 1097 goto skip; 1098 } 1099 1100 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1101 BUS_DMASYNC_POSTREAD); 1102 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1103 1104 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1105 mtod(mnew, void *), MCLBYTES, rt2661_dma_map_addr, 1106 &physaddr, 0); 1107 if (error != 0) { 1108 m_freem(mnew); 1109 1110 /* try to reload the old mbuf */ 1111 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1112 mtod(data->m, void *), MCLBYTES, 1113 rt2661_dma_map_addr, &physaddr, 0); 1114 if (error != 0) { 1115 /* very unlikely that it will fail... */ 1116 panic("%s: could not load old rx mbuf", 1117 device_get_name(sc->sc_dev)); 1118 } 1119 ifp->if_ierrors++; 1120 goto skip; 1121 } 1122 1123 /* 1124 * New mbuf successfully loaded, update Rx ring and continue 1125 * processing. 1126 */ 1127 m = data->m; 1128 data->m = mnew; 1129 desc->physaddr = htole32(physaddr); 1130 1131 /* finalize mbuf */ 1132 m->m_pkthdr.rcvif = ifp; 1133 m->m_pkthdr.len = m->m_len = 1134 (le32toh(desc->flags) >> 16) & 0xfff; 1135 1136 if (sc->sc_drvbpf != NULL) { 1137 struct rt2661_rx_radiotap_header *tap = &sc->sc_rxtap; 1138 uint32_t tsf_lo, tsf_hi; 1139 1140 /* get timestamp (low and high 32 bits) */ 1141 tsf_hi = RAL_READ(sc, RT2661_TXRX_CSR13); 1142 tsf_lo = RAL_READ(sc, RT2661_TXRX_CSR12); 1143 1144 tap->wr_tsf = 1145 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1146 tap->wr_flags = 0; 1147 tap->wr_rate = rt2661_rxrate(desc); 1148 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1149 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1150 tap->wr_antsignal = desc->rssi; 1151 1152 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1153 } 1154 1155 wh = mtod(m, struct ieee80211_frame *); 1156 ni = ieee80211_find_rxnode(ic, 1157 (struct ieee80211_frame_min *)wh); 1158 1159 /* send the frame to the 802.11 layer */ 1160 ieee80211_input(ic, m, ni, desc->rssi, 0); 1161 1162 /* give rssi to the rate adatation algorithm */ 1163 rn = (struct rt2661_node *)ni; 1164 ral_rssadapt_input(ic, ni, &rn->rssadapt, 1165 rt2661_get_rssi(sc, desc->rssi)); 1166 1167 /* node is no longer needed */ 1168 ieee80211_free_node(ni); 1169 1170 skip: desc->flags |= htole32(RT2661_RX_BUSY); 1171 1172 DPRINTFN(15, ("rx intr idx=%u\n", sc->rxq.cur)); 1173 1174 sc->rxq.cur = (sc->rxq.cur + 1) % RT2661_RX_RING_COUNT; 1175 } 1176 1177 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1178 BUS_DMASYNC_PREWRITE); 1179 } 1180 1181 /* ARGSUSED */ 1182 static void 1183 rt2661_mcu_beacon_expire(struct rt2661_softc *sc) 1184 { 1185 /* do nothing */ 1186 } 1187 1188 static void 1189 rt2661_mcu_wakeup(struct rt2661_softc *sc) 1190 { 1191 RAL_WRITE(sc, RT2661_MAC_CSR11, 5 << 16); 1192 1193 RAL_WRITE(sc, RT2661_SOFT_RESET_CSR, 0x7); 1194 RAL_WRITE(sc, RT2661_IO_CNTL_CSR, 0x18); 1195 RAL_WRITE(sc, RT2661_PCI_USEC_CSR, 0x20); 1196 1197 /* send wakeup command to MCU */ 1198 rt2661_tx_cmd(sc, RT2661_MCU_CMD_WAKEUP, 0); 1199 } 1200 1201 static void 1202 rt2661_mcu_cmd_intr(struct rt2661_softc *sc) 1203 { 1204 RAL_READ(sc, RT2661_M2H_CMD_DONE_CSR); 1205 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 1206 } 1207 1208 void 1209 rt2661_intr(void *arg) 1210 { 1211 struct rt2661_softc *sc = arg; 1212 struct ifnet *ifp = sc->sc_ifp; 1213 uint32_t r1, r2; 1214 1215 RAL_LOCK(sc); 1216 1217 /* disable MAC and MCU interrupts */ 1218 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffff7f); 1219 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 1220 1221 /* don't re-enable interrupts if we're shutting down */ 1222 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1223 RAL_UNLOCK(sc); 1224 return; 1225 } 1226 1227 r1 = RAL_READ(sc, RT2661_INT_SOURCE_CSR); 1228 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, r1); 1229 1230 r2 = RAL_READ(sc, RT2661_MCU_INT_SOURCE_CSR); 1231 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, r2); 1232 1233 if (r1 & RT2661_MGT_DONE) 1234 rt2661_tx_dma_intr(sc, &sc->mgtq); 1235 1236 if (r1 & RT2661_RX_DONE) 1237 rt2661_rx_intr(sc); 1238 1239 if (r1 & RT2661_TX0_DMA_DONE) 1240 rt2661_tx_dma_intr(sc, &sc->txq[0]); 1241 1242 if (r1 & RT2661_TX1_DMA_DONE) 1243 rt2661_tx_dma_intr(sc, &sc->txq[1]); 1244 1245 if (r1 & RT2661_TX2_DMA_DONE) 1246 rt2661_tx_dma_intr(sc, &sc->txq[2]); 1247 1248 if (r1 & RT2661_TX3_DMA_DONE) 1249 rt2661_tx_dma_intr(sc, &sc->txq[3]); 1250 1251 if (r1 & RT2661_TX_DONE) 1252 rt2661_tx_intr(sc); 1253 1254 if (r2 & RT2661_MCU_CMD_DONE) 1255 rt2661_mcu_cmd_intr(sc); 1256 1257 if (r2 & RT2661_MCU_BEACON_EXPIRE) 1258 rt2661_mcu_beacon_expire(sc); 1259 1260 if (r2 & RT2661_MCU_WAKEUP) 1261 rt2661_mcu_wakeup(sc); 1262 1263 /* re-enable MAC and MCU interrupts */ 1264 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 1265 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 1266 1267 RAL_UNLOCK(sc); 1268 } 1269 1270 /* quickly determine if a given rate is CCK or OFDM */ 1271 #define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1272 1273 #define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1274 #define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1275 1276 #define RAL_SIFS 10 /* us */ 1277 1278 /* 1279 * This function is only used by the Rx radiotap code. It returns the rate at 1280 * which a given frame was received. 1281 */ 1282 static uint8_t 1283 rt2661_rxrate(struct rt2661_rx_desc *desc) 1284 { 1285 if (le32toh(desc->flags) & RT2661_RX_OFDM) { 1286 /* reverse function of rt2661_plcp_signal */ 1287 switch (desc->rate & 0xf) { 1288 case 0xb: return 12; 1289 case 0xf: return 18; 1290 case 0xa: return 24; 1291 case 0xe: return 36; 1292 case 0x9: return 48; 1293 case 0xd: return 72; 1294 case 0x8: return 96; 1295 case 0xc: return 108; 1296 } 1297 } else { 1298 if (desc->rate == 10) 1299 return 2; 1300 if (desc->rate == 20) 1301 return 4; 1302 if (desc->rate == 55) 1303 return 11; 1304 if (desc->rate == 110) 1305 return 22; 1306 } 1307 return 2; /* should not get there */ 1308 } 1309 1310 /* 1311 * Return the expected ack rate for a frame transmitted at rate `rate'. 1312 * XXX: this should depend on the destination node basic rate set. 1313 */ 1314 static int 1315 rt2661_ack_rate(struct ieee80211com *ic, int rate) 1316 { 1317 switch (rate) { 1318 /* CCK rates */ 1319 case 2: 1320 return 2; 1321 case 4: 1322 case 11: 1323 case 22: 1324 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1325 1326 /* OFDM rates */ 1327 case 12: 1328 case 18: 1329 return 12; 1330 case 24: 1331 case 36: 1332 return 24; 1333 case 48: 1334 case 72: 1335 case 96: 1336 case 108: 1337 return 48; 1338 } 1339 1340 /* default to 1Mbps */ 1341 return 2; 1342 } 1343 1344 /* 1345 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1346 * The function automatically determines the operating mode depending on the 1347 * given rate. `flags' indicates whether short preamble is in use or not. 1348 */ 1349 static uint16_t 1350 rt2661_txtime(int len, int rate, uint32_t flags) 1351 { 1352 uint16_t txtime; 1353 1354 if (RAL_RATE_IS_OFDM(rate)) { 1355 /* IEEE Std 802.11a-1999, pp. 37 */ 1356 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1357 txtime = 16 + 4 + 4 * txtime + 6; 1358 } else { 1359 /* IEEE Std 802.11b-1999, pp. 28 */ 1360 txtime = (16 * len + rate - 1) / rate; 1361 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1362 txtime += 72 + 24; 1363 else 1364 txtime += 144 + 48; 1365 } 1366 1367 return txtime; 1368 } 1369 1370 static uint8_t 1371 rt2661_plcp_signal(int rate) 1372 { 1373 switch (rate) { 1374 /* CCK rates (returned values are device-dependent) */ 1375 case 2: return 0x0; 1376 case 4: return 0x1; 1377 case 11: return 0x2; 1378 case 22: return 0x3; 1379 1380 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1381 case 12: return 0xb; 1382 case 18: return 0xf; 1383 case 24: return 0xa; 1384 case 36: return 0xe; 1385 case 48: return 0x9; 1386 case 72: return 0xd; 1387 case 96: return 0x8; 1388 case 108: return 0xc; 1389 1390 /* unsupported rates (should not get there) */ 1391 default: return 0xff; 1392 } 1393 } 1394 1395 static void 1396 rt2661_setup_tx_desc(struct rt2661_softc *sc, struct rt2661_tx_desc *desc, 1397 uint32_t flags, uint16_t xflags, int len, int rate, 1398 const bus_dma_segment_t *segs, int nsegs, int ac) 1399 { 1400 struct ieee80211com *ic = &sc->sc_ic; 1401 uint16_t plcp_length; 1402 int i, remainder; 1403 1404 desc->flags = htole32(flags); 1405 desc->flags |= htole32(len << 16); 1406 desc->flags |= htole32(RT2661_TX_BUSY | RT2661_TX_VALID); 1407 1408 desc->xflags = htole16(xflags); 1409 desc->xflags |= htole16(nsegs << 13); 1410 1411 desc->wme = htole16( 1412 RT2661_QID(ac) | 1413 RT2661_AIFSN(2) | 1414 RT2661_LOGCWMIN(4) | 1415 RT2661_LOGCWMAX(10)); 1416 1417 /* 1418 * Remember in which queue this frame was sent. This field is driver 1419 * private data only. It will be made available by the NIC in STA_CSR4 1420 * on Tx interrupts. 1421 */ 1422 desc->qid = ac; 1423 1424 /* setup PLCP fields */ 1425 desc->plcp_signal = rt2661_plcp_signal(rate); 1426 desc->plcp_service = 4; 1427 1428 len += IEEE80211_CRC_LEN; 1429 if (RAL_RATE_IS_OFDM(rate)) { 1430 desc->flags |= htole32(RT2661_TX_OFDM); 1431 1432 plcp_length = len & 0xfff; 1433 desc->plcp_length_hi = plcp_length >> 6; 1434 desc->plcp_length_lo = plcp_length & 0x3f; 1435 } else { 1436 plcp_length = (16 * len + rate - 1) / rate; 1437 if (rate == 22) { 1438 remainder = (16 * len) % 22; 1439 if (remainder != 0 && remainder < 7) 1440 desc->plcp_service |= RT2661_PLCP_LENGEXT; 1441 } 1442 desc->plcp_length_hi = plcp_length >> 8; 1443 desc->plcp_length_lo = plcp_length & 0xff; 1444 1445 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1446 desc->plcp_signal |= 0x08; 1447 } 1448 1449 /* RT2x61 supports scatter with up to 5 segments */ 1450 for (i = 0; i < nsegs; i++) { 1451 desc->addr[i] = htole32(segs[i].ds_addr); 1452 desc->len [i] = htole16(segs[i].ds_len); 1453 } 1454 } 1455 1456 static int 1457 rt2661_tx_mgt(struct rt2661_softc *sc, struct mbuf *m0, 1458 struct ieee80211_node *ni) 1459 { 1460 struct ieee80211com *ic = &sc->sc_ic; 1461 struct rt2661_tx_desc *desc; 1462 struct rt2661_tx_data *data; 1463 struct ieee80211_frame *wh; 1464 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1465 uint16_t dur; 1466 uint32_t flags = 0; /* XXX HWSEQ */ 1467 int nsegs, rate, error; 1468 1469 desc = &sc->mgtq.desc[sc->mgtq.cur]; 1470 data = &sc->mgtq.data[sc->mgtq.cur]; 1471 1472 /* send mgt frames at the lowest available rate */ 1473 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1474 1475 error = bus_dmamap_load_mbuf_sg(sc->mgtq.data_dmat, data->map, m0, 1476 segs, &nsegs, 0); 1477 if (error != 0) { 1478 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1479 error); 1480 m_freem(m0); 1481 return error; 1482 } 1483 1484 if (sc->sc_drvbpf != NULL) { 1485 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1486 1487 tap->wt_flags = 0; 1488 tap->wt_rate = rate; 1489 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1490 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1491 1492 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1493 } 1494 1495 data->m = m0; 1496 data->ni = ni; 1497 1498 wh = mtod(m0, struct ieee80211_frame *); 1499 1500 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1501 flags |= RT2661_TX_NEED_ACK; 1502 1503 dur = rt2661_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1504 RAL_SIFS; 1505 *(uint16_t *)wh->i_dur = htole16(dur); 1506 1507 /* tell hardware to add timestamp in probe responses */ 1508 if ((wh->i_fc[0] & 1509 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1510 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1511 flags |= RT2661_TX_TIMESTAMP; 1512 } 1513 1514 rt2661_setup_tx_desc(sc, desc, flags, 0 /* XXX HWSEQ */, 1515 m0->m_pkthdr.len, rate, segs, nsegs, RT2661_QID_MGT); 1516 1517 bus_dmamap_sync(sc->mgtq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1518 bus_dmamap_sync(sc->mgtq.desc_dmat, sc->mgtq.desc_map, 1519 BUS_DMASYNC_PREWRITE); 1520 1521 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1522 m0->m_pkthdr.len, sc->mgtq.cur, rate)); 1523 1524 /* kick mgt */ 1525 sc->mgtq.queued++; 1526 sc->mgtq.cur = (sc->mgtq.cur + 1) % RT2661_MGT_RING_COUNT; 1527 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, RT2661_KICK_MGT); 1528 1529 return 0; 1530 } 1531 1532 /* 1533 * Build a RTS control frame. 1534 */ 1535 static struct mbuf * 1536 rt2661_get_rts(struct rt2661_softc *sc, struct ieee80211_frame *wh, 1537 uint16_t dur) 1538 { 1539 struct ieee80211_frame_rts *rts; 1540 struct mbuf *m; 1541 1542 MGETHDR(m, M_DONTWAIT, MT_DATA); 1543 if (m == NULL) { 1544 sc->sc_ic.ic_stats.is_tx_nobuf++; 1545 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1546 return NULL; 1547 } 1548 1549 rts = mtod(m, struct ieee80211_frame_rts *); 1550 1551 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1552 IEEE80211_FC0_SUBTYPE_RTS; 1553 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1554 *(uint16_t *)rts->i_dur = htole16(dur); 1555 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1556 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1557 1558 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1559 1560 return m; 1561 } 1562 1563 static int 1564 rt2661_tx_data(struct rt2661_softc *sc, struct mbuf *m0, 1565 struct ieee80211_node *ni, int ac) 1566 { 1567 struct ieee80211com *ic = &sc->sc_ic; 1568 struct rt2661_tx_ring *txq = &sc->txq[ac]; 1569 struct rt2661_tx_desc *desc; 1570 struct rt2661_tx_data *data; 1571 struct rt2661_node *rn; 1572 struct ieee80211_rateset *rs; 1573 struct ieee80211_frame *wh; 1574 struct ieee80211_key *k; 1575 const struct chanAccParams *cap; 1576 struct mbuf *mnew; 1577 bus_dma_segment_t segs[RT2661_MAX_SCATTER]; 1578 uint16_t dur; 1579 uint32_t flags = 0; 1580 int error, nsegs, rate, noack = 0; 1581 1582 wh = mtod(m0, struct ieee80211_frame *); 1583 1584 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1585 rs = &ic->ic_sup_rates[ic->ic_curmode]; 1586 rate = rs->rs_rates[ic->ic_fixed_rate]; 1587 } else { 1588 rs = &ni->ni_rates; 1589 rn = (struct rt2661_node *)ni; 1590 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, 1591 wh, m0->m_pkthdr.len, NULL, 0); 1592 rate = rs->rs_rates[ni->ni_txrate]; 1593 } 1594 rate &= IEEE80211_RATE_VAL; 1595 1596 if (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_QOS) { 1597 cap = &ic->ic_wme.wme_chanParams; 1598 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1599 } 1600 1601 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1602 k = ieee80211_crypto_encap(ic, ni, m0); 1603 if (k == NULL) { 1604 m_freem(m0); 1605 return ENOBUFS; 1606 } 1607 1608 /* packet header may have moved, reset our local pointer */ 1609 wh = mtod(m0, struct ieee80211_frame *); 1610 } 1611 1612 /* 1613 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1614 * for directed frames only when the length of the MPDU is greater 1615 * than the length threshold indicated by [...]" ic_rtsthreshold. 1616 */ 1617 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1618 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1619 struct mbuf *m; 1620 uint16_t dur; 1621 int rtsrate, ackrate; 1622 1623 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1624 ackrate = rt2661_ack_rate(ic, rate); 1625 1626 dur = rt2661_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1627 rt2661_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1628 /* XXX: noack (QoS)? */ 1629 rt2661_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1630 3 * RAL_SIFS; 1631 1632 m = rt2661_get_rts(sc, wh, dur); 1633 1634 desc = &txq->desc[txq->cur]; 1635 data = &txq->data[txq->cur]; 1636 1637 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m, 1638 segs, &nsegs, 0); 1639 if (error != 0) { 1640 device_printf(sc->sc_dev, 1641 "could not map mbuf (error %d)\n", error); 1642 m_freem(m); 1643 m_freem(m0); 1644 return error; 1645 } 1646 1647 /* avoid multiple free() of the same node for each fragment */ 1648 ieee80211_ref_node(ni); 1649 1650 data->m = m; 1651 data->ni = ni; 1652 1653 /* RTS frames are not taken into account for rssadapt */ 1654 data->id.id_node = NULL; 1655 1656 rt2661_setup_tx_desc(sc, desc, RT2661_TX_NEED_ACK | 1657 RT2661_TX_MORE_FRAG, 0, m->m_pkthdr.len, rtsrate, segs, 1658 nsegs, ac); 1659 1660 bus_dmamap_sync(txq->data_dmat, data->map, 1661 BUS_DMASYNC_PREWRITE); 1662 1663 txq->queued++; 1664 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1665 1666 /* 1667 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1668 * asynchronous data frame shall be transmitted after the CTS 1669 * frame and a SIFS period. 1670 */ 1671 flags |= RT2661_TX_LONG_RETRY | RT2661_TX_IFS; 1672 } 1673 1674 data = &txq->data[txq->cur]; 1675 desc = &txq->desc[txq->cur]; 1676 1677 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, segs, 1678 &nsegs, 0); 1679 if (error != 0 && error != EFBIG) { 1680 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1681 error); 1682 m_freem(m0); 1683 return error; 1684 } 1685 if (error != 0) { 1686 mnew = m_defrag(m0, M_DONTWAIT); 1687 if (mnew == NULL) { 1688 device_printf(sc->sc_dev, 1689 "could not defragment mbuf\n"); 1690 m_freem(m0); 1691 return ENOBUFS; 1692 } 1693 m0 = mnew; 1694 1695 error = bus_dmamap_load_mbuf_sg(txq->data_dmat, data->map, m0, 1696 segs, &nsegs, 0); 1697 if (error != 0) { 1698 device_printf(sc->sc_dev, 1699 "could not map mbuf (error %d)\n", error); 1700 m_freem(m0); 1701 return error; 1702 } 1703 1704 /* packet header have moved, reset our local pointer */ 1705 wh = mtod(m0, struct ieee80211_frame *); 1706 } 1707 1708 if (sc->sc_drvbpf != NULL) { 1709 struct rt2661_tx_radiotap_header *tap = &sc->sc_txtap; 1710 1711 tap->wt_flags = 0; 1712 tap->wt_rate = rate; 1713 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1714 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1715 1716 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1717 } 1718 1719 data->m = m0; 1720 data->ni = ni; 1721 1722 /* remember link conditions for rate adaptation algorithm */ 1723 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1724 data->id.id_len = m0->m_pkthdr.len; 1725 data->id.id_rateidx = ni->ni_txrate; 1726 data->id.id_node = ni; 1727 data->id.id_rssi = ni->ni_rssi; 1728 } else 1729 data->id.id_node = NULL; 1730 1731 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1732 flags |= RT2661_TX_NEED_ACK; 1733 1734 dur = rt2661_txtime(RAL_ACK_SIZE, rt2661_ack_rate(ic, rate), 1735 ic->ic_flags) + RAL_SIFS; 1736 *(uint16_t *)wh->i_dur = htole16(dur); 1737 } 1738 1739 rt2661_setup_tx_desc(sc, desc, flags, 0, m0->m_pkthdr.len, rate, segs, 1740 nsegs, ac); 1741 1742 bus_dmamap_sync(txq->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1743 bus_dmamap_sync(txq->desc_dmat, txq->desc_map, BUS_DMASYNC_PREWRITE); 1744 1745 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1746 m0->m_pkthdr.len, txq->cur, rate)); 1747 1748 /* kick Tx */ 1749 txq->queued++; 1750 txq->cur = (txq->cur + 1) % RT2661_TX_RING_COUNT; 1751 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 1 << ac); 1752 1753 return 0; 1754 } 1755 1756 static void 1757 rt2661_start(struct ifnet *ifp) 1758 { 1759 struct rt2661_softc *sc = ifp->if_softc; 1760 struct ieee80211com *ic = &sc->sc_ic; 1761 struct mbuf *m0; 1762 struct ether_header *eh; 1763 struct ieee80211_node *ni; 1764 int ac; 1765 1766 RAL_LOCK(sc); 1767 1768 /* prevent management frames from being sent if we're not ready */ 1769 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1770 RAL_UNLOCK(sc); 1771 return; 1772 } 1773 1774 for (;;) { 1775 IF_POLL(&ic->ic_mgtq, m0); 1776 if (m0 != NULL) { 1777 if (sc->mgtq.queued >= RT2661_MGT_RING_COUNT) { 1778 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1779 break; 1780 } 1781 IF_DEQUEUE(&ic->ic_mgtq, m0); 1782 1783 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1784 m0->m_pkthdr.rcvif = NULL; 1785 1786 if (ic->ic_rawbpf != NULL) 1787 bpf_mtap(ic->ic_rawbpf, m0); 1788 1789 if (rt2661_tx_mgt(sc, m0, ni) != 0) 1790 break; 1791 1792 } else { 1793 if (ic->ic_state != IEEE80211_S_RUN) 1794 break; 1795 1796 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 1797 if (m0 == NULL) 1798 break; 1799 1800 if (m0->m_len < sizeof (struct ether_header) && 1801 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 1802 continue; 1803 1804 eh = mtod(m0, struct ether_header *); 1805 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1806 if (ni == NULL) { 1807 m_freem(m0); 1808 ifp->if_oerrors++; 1809 continue; 1810 } 1811 1812 /* classify mbuf so we can find which tx ring to use */ 1813 if (ieee80211_classify(ic, m0, ni) != 0) { 1814 m_freem(m0); 1815 ieee80211_free_node(ni); 1816 ifp->if_oerrors++; 1817 continue; 1818 } 1819 1820 /* no QoS encapsulation for EAPOL frames */ 1821 ac = (eh->ether_type != htons(ETHERTYPE_PAE)) ? 1822 M_WME_GETAC(m0) : WME_AC_BE; 1823 1824 if (sc->txq[ac].queued >= RT2661_TX_RING_COUNT - 1) { 1825 /* there is no place left in this ring */ 1826 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 1827 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1828 break; 1829 } 1830 1831 BPF_MTAP(ifp, m0); 1832 1833 m0 = ieee80211_encap(ic, m0, ni); 1834 if (m0 == NULL) { 1835 ieee80211_free_node(ni); 1836 ifp->if_oerrors++; 1837 continue; 1838 } 1839 1840 if (ic->ic_rawbpf != NULL) 1841 bpf_mtap(ic->ic_rawbpf, m0); 1842 1843 if (rt2661_tx_data(sc, m0, ni, ac) != 0) { 1844 ieee80211_free_node(ni); 1845 ifp->if_oerrors++; 1846 break; 1847 } 1848 } 1849 1850 sc->sc_tx_timer = 5; 1851 ifp->if_timer = 1; 1852 } 1853 1854 RAL_UNLOCK(sc); 1855 } 1856 1857 static void 1858 rt2661_watchdog(struct ifnet *ifp) 1859 { 1860 struct rt2661_softc *sc = ifp->if_softc; 1861 struct ieee80211com *ic = &sc->sc_ic; 1862 1863 RAL_LOCK(sc); 1864 1865 ifp->if_timer = 0; 1866 1867 if (sc->sc_tx_timer > 0) { 1868 if (--sc->sc_tx_timer == 0) { 1869 device_printf(sc->sc_dev, "device timeout\n"); 1870 rt2661_init(sc); 1871 ifp->if_oerrors++; 1872 RAL_UNLOCK(sc); 1873 return; 1874 } 1875 ifp->if_timer = 1; 1876 } 1877 1878 ieee80211_watchdog(ic); 1879 1880 RAL_UNLOCK(sc); 1881 } 1882 1883 /* 1884 * This function allows for fast channel switching in monitor mode (used by 1885 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 1886 * generate a new beacon frame. 1887 */ 1888 static int 1889 rt2661_reset(struct ifnet *ifp) 1890 { 1891 struct rt2661_softc *sc = ifp->if_softc; 1892 struct ieee80211com *ic = &sc->sc_ic; 1893 1894 if (ic->ic_opmode != IEEE80211_M_MONITOR) 1895 return ENETRESET; 1896 1897 rt2661_set_chan(sc, ic->ic_curchan); 1898 1899 return 0; 1900 } 1901 1902 static int 1903 rt2661_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1904 { 1905 struct rt2661_softc *sc = ifp->if_softc; 1906 struct ieee80211com *ic = &sc->sc_ic; 1907 int error = 0; 1908 1909 RAL_LOCK(sc); 1910 1911 switch (cmd) { 1912 case SIOCSIFFLAGS: 1913 if (ifp->if_flags & IFF_UP) { 1914 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1915 rt2661_update_promisc(sc); 1916 else 1917 rt2661_init(sc); 1918 } else { 1919 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 1920 rt2661_stop(sc); 1921 } 1922 break; 1923 1924 default: 1925 error = ieee80211_ioctl(ic, cmd, data); 1926 } 1927 1928 if (error == ENETRESET) { 1929 if ((ifp->if_flags & IFF_UP) && 1930 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 1931 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 1932 rt2661_init(sc); 1933 error = 0; 1934 } 1935 1936 RAL_UNLOCK(sc); 1937 1938 return error; 1939 } 1940 1941 static void 1942 rt2661_bbp_write(struct rt2661_softc *sc, uint8_t reg, uint8_t val) 1943 { 1944 uint32_t tmp; 1945 int ntries; 1946 1947 for (ntries = 0; ntries < 100; ntries++) { 1948 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1949 break; 1950 DELAY(1); 1951 } 1952 if (ntries == 100) { 1953 device_printf(sc->sc_dev, "could not write to BBP\n"); 1954 return; 1955 } 1956 1957 tmp = RT2661_BBP_BUSY | (reg & 0x7f) << 8 | val; 1958 RAL_WRITE(sc, RT2661_PHY_CSR3, tmp); 1959 1960 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 1961 } 1962 1963 static uint8_t 1964 rt2661_bbp_read(struct rt2661_softc *sc, uint8_t reg) 1965 { 1966 uint32_t val; 1967 int ntries; 1968 1969 for (ntries = 0; ntries < 100; ntries++) { 1970 if (!(RAL_READ(sc, RT2661_PHY_CSR3) & RT2661_BBP_BUSY)) 1971 break; 1972 DELAY(1); 1973 } 1974 if (ntries == 100) { 1975 device_printf(sc->sc_dev, "could not read from BBP\n"); 1976 return 0; 1977 } 1978 1979 val = RT2661_BBP_BUSY | RT2661_BBP_READ | reg << 8; 1980 RAL_WRITE(sc, RT2661_PHY_CSR3, val); 1981 1982 for (ntries = 0; ntries < 100; ntries++) { 1983 val = RAL_READ(sc, RT2661_PHY_CSR3); 1984 if (!(val & RT2661_BBP_BUSY)) 1985 return val & 0xff; 1986 DELAY(1); 1987 } 1988 1989 device_printf(sc->sc_dev, "could not read from BBP\n"); 1990 return 0; 1991 } 1992 1993 static void 1994 rt2661_rf_write(struct rt2661_softc *sc, uint8_t reg, uint32_t val) 1995 { 1996 uint32_t tmp; 1997 int ntries; 1998 1999 for (ntries = 0; ntries < 100; ntries++) { 2000 if (!(RAL_READ(sc, RT2661_PHY_CSR4) & RT2661_RF_BUSY)) 2001 break; 2002 DELAY(1); 2003 } 2004 if (ntries == 100) { 2005 device_printf(sc->sc_dev, "could not write to RF\n"); 2006 return; 2007 } 2008 2009 tmp = RT2661_RF_BUSY | RT2661_RF_21BIT | (val & 0x1fffff) << 2 | 2010 (reg & 3); 2011 RAL_WRITE(sc, RT2661_PHY_CSR4, tmp); 2012 2013 /* remember last written value in sc */ 2014 sc->rf_regs[reg] = val; 2015 2016 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 3, val & 0x1fffff)); 2017 } 2018 2019 static int 2020 rt2661_tx_cmd(struct rt2661_softc *sc, uint8_t cmd, uint16_t arg) 2021 { 2022 if (RAL_READ(sc, RT2661_H2M_MAILBOX_CSR) & RT2661_H2M_BUSY) 2023 return EIO; /* there is already a command pending */ 2024 2025 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 2026 RT2661_H2M_BUSY | RT2661_TOKEN_NO_INTR << 16 | arg); 2027 2028 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, RT2661_KICK_CMD | cmd); 2029 2030 return 0; 2031 } 2032 2033 static void 2034 rt2661_select_antenna(struct rt2661_softc *sc) 2035 { 2036 uint8_t bbp4, bbp77; 2037 uint32_t tmp; 2038 2039 bbp4 = rt2661_bbp_read(sc, 4); 2040 bbp77 = rt2661_bbp_read(sc, 77); 2041 2042 /* TBD */ 2043 2044 /* make sure Rx is disabled before switching antenna */ 2045 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2046 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2047 2048 rt2661_bbp_write(sc, 4, bbp4); 2049 rt2661_bbp_write(sc, 77, bbp77); 2050 2051 /* restore Rx filter */ 2052 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2053 } 2054 2055 /* 2056 * Enable multi-rate retries for frames sent at OFDM rates. 2057 * In 802.11b/g mode, allow fallback to CCK rates. 2058 */ 2059 static void 2060 rt2661_enable_mrr(struct rt2661_softc *sc) 2061 { 2062 struct ieee80211com *ic = &sc->sc_ic; 2063 uint32_t tmp; 2064 2065 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 2066 2067 tmp &= ~RT2661_MRR_CCK_FALLBACK; 2068 if (!IEEE80211_IS_CHAN_5GHZ(ic->ic_bss->ni_chan)) 2069 tmp |= RT2661_MRR_CCK_FALLBACK; 2070 tmp |= RT2661_MRR_ENABLED; 2071 2072 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 2073 } 2074 2075 static void 2076 rt2661_set_txpreamble(struct rt2661_softc *sc) 2077 { 2078 uint32_t tmp; 2079 2080 tmp = RAL_READ(sc, RT2661_TXRX_CSR4); 2081 2082 tmp &= ~RT2661_SHORT_PREAMBLE; 2083 if (sc->sc_ic.ic_flags & IEEE80211_F_SHPREAMBLE) 2084 tmp |= RT2661_SHORT_PREAMBLE; 2085 2086 RAL_WRITE(sc, RT2661_TXRX_CSR4, tmp); 2087 } 2088 2089 static void 2090 rt2661_set_basicrates(struct rt2661_softc *sc, 2091 const struct ieee80211_rateset *rs) 2092 { 2093 #define RV(r) ((r) & IEEE80211_RATE_VAL) 2094 uint32_t mask = 0; 2095 uint8_t rate; 2096 int i, j; 2097 2098 for (i = 0; i < rs->rs_nrates; i++) { 2099 rate = rs->rs_rates[i]; 2100 2101 if (!(rate & IEEE80211_RATE_BASIC)) 2102 continue; 2103 2104 /* 2105 * Find h/w rate index. We know it exists because the rate 2106 * set has already been negotiated. 2107 */ 2108 for (j = 0; rt2661_rateset_11g.rs_rates[j] != RV(rate); j++); 2109 2110 mask |= 1 << j; 2111 } 2112 2113 RAL_WRITE(sc, RT2661_TXRX_CSR5, mask); 2114 2115 DPRINTF(("Setting basic rate mask to 0x%x\n", mask)); 2116 #undef RV 2117 } 2118 2119 /* 2120 * Reprogram MAC/BBP to switch to a new band. Values taken from the reference 2121 * driver. 2122 */ 2123 static void 2124 rt2661_select_band(struct rt2661_softc *sc, struct ieee80211_channel *c) 2125 { 2126 uint8_t bbp17, bbp35, bbp96, bbp97, bbp98, bbp104; 2127 uint32_t tmp; 2128 2129 /* update all BBP registers that depend on the band */ 2130 bbp17 = 0x20; bbp96 = 0x48; bbp104 = 0x2c; 2131 bbp35 = 0x50; bbp97 = 0x48; bbp98 = 0x48; 2132 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2133 bbp17 += 0x08; bbp96 += 0x10; bbp104 += 0x0c; 2134 bbp35 += 0x10; bbp97 += 0x10; bbp98 += 0x10; 2135 } 2136 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 2137 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 2138 bbp17 += 0x10; bbp96 += 0x10; bbp104 += 0x10; 2139 } 2140 2141 rt2661_bbp_write(sc, 17, bbp17); 2142 rt2661_bbp_write(sc, 96, bbp96); 2143 rt2661_bbp_write(sc, 104, bbp104); 2144 2145 if ((IEEE80211_IS_CHAN_2GHZ(c) && sc->ext_2ghz_lna) || 2146 (IEEE80211_IS_CHAN_5GHZ(c) && sc->ext_5ghz_lna)) { 2147 rt2661_bbp_write(sc, 75, 0x80); 2148 rt2661_bbp_write(sc, 86, 0x80); 2149 rt2661_bbp_write(sc, 88, 0x80); 2150 } 2151 2152 rt2661_bbp_write(sc, 35, bbp35); 2153 rt2661_bbp_write(sc, 97, bbp97); 2154 rt2661_bbp_write(sc, 98, bbp98); 2155 2156 tmp = RAL_READ(sc, RT2661_PHY_CSR0); 2157 tmp &= ~(RT2661_PA_PE_2GHZ | RT2661_PA_PE_5GHZ); 2158 if (IEEE80211_IS_CHAN_2GHZ(c)) 2159 tmp |= RT2661_PA_PE_2GHZ; 2160 else 2161 tmp |= RT2661_PA_PE_5GHZ; 2162 RAL_WRITE(sc, RT2661_PHY_CSR0, tmp); 2163 } 2164 2165 static void 2166 rt2661_set_chan(struct rt2661_softc *sc, struct ieee80211_channel *c) 2167 { 2168 struct ieee80211com *ic = &sc->sc_ic; 2169 const struct rfprog *rfprog; 2170 uint8_t bbp3, bbp94 = RT2661_BBPR94_DEFAULT; 2171 int8_t power; 2172 u_int i, chan; 2173 2174 chan = ieee80211_chan2ieee(ic, c); 2175 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2176 return; 2177 2178 /* select the appropriate RF settings based on what EEPROM says */ 2179 rfprog = (sc->rfprog == 0) ? rt2661_rf5225_1 : rt2661_rf5225_2; 2180 2181 /* find the settings for this channel (we know it exists) */ 2182 for (i = 0; rfprog[i].chan != chan; i++); 2183 2184 power = sc->txpow[i]; 2185 if (power < 0) { 2186 bbp94 += power; 2187 power = 0; 2188 } else if (power > 31) { 2189 bbp94 += power - 31; 2190 power = 31; 2191 } 2192 2193 /* 2194 * If we are switching from the 2GHz band to the 5GHz band or 2195 * vice-versa, BBP registers need to be reprogrammed. 2196 */ 2197 if (c->ic_flags != sc->sc_curchan->ic_flags) { 2198 rt2661_select_band(sc, c); 2199 rt2661_select_antenna(sc); 2200 } 2201 sc->sc_curchan = c; 2202 2203 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 2204 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 2205 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 2206 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 2207 2208 DELAY(200); 2209 2210 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 2211 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 2212 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7 | 1); 2213 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 2214 2215 DELAY(200); 2216 2217 rt2661_rf_write(sc, RAL_RF1, rfprog[i].r1); 2218 rt2661_rf_write(sc, RAL_RF2, rfprog[i].r2); 2219 rt2661_rf_write(sc, RAL_RF3, rfprog[i].r3 | power << 7); 2220 rt2661_rf_write(sc, RAL_RF4, rfprog[i].r4 | sc->rffreq << 10); 2221 2222 /* enable smart mode for MIMO-capable RFs */ 2223 bbp3 = rt2661_bbp_read(sc, 3); 2224 2225 bbp3 &= ~RT2661_SMART_MODE; 2226 if (sc->rf_rev == RT2661_RF_5325 || sc->rf_rev == RT2661_RF_2529) 2227 bbp3 |= RT2661_SMART_MODE; 2228 2229 rt2661_bbp_write(sc, 3, bbp3); 2230 2231 if (bbp94 != RT2661_BBPR94_DEFAULT) 2232 rt2661_bbp_write(sc, 94, bbp94); 2233 2234 /* 5GHz radio needs a 1ms delay here */ 2235 if (IEEE80211_IS_CHAN_5GHZ(c)) 2236 DELAY(1000); 2237 } 2238 2239 static void 2240 rt2661_set_bssid(struct rt2661_softc *sc, const uint8_t *bssid) 2241 { 2242 uint32_t tmp; 2243 2244 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2245 RAL_WRITE(sc, RT2661_MAC_CSR4, tmp); 2246 2247 tmp = bssid[4] | bssid[5] << 8 | RT2661_ONE_BSSID << 16; 2248 RAL_WRITE(sc, RT2661_MAC_CSR5, tmp); 2249 } 2250 2251 static void 2252 rt2661_set_macaddr(struct rt2661_softc *sc, const uint8_t *addr) 2253 { 2254 uint32_t tmp; 2255 2256 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2257 RAL_WRITE(sc, RT2661_MAC_CSR2, tmp); 2258 2259 tmp = addr[4] | addr[5] << 8; 2260 RAL_WRITE(sc, RT2661_MAC_CSR3, tmp); 2261 } 2262 2263 static void 2264 rt2661_update_promisc(struct rt2661_softc *sc) 2265 { 2266 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2267 uint32_t tmp; 2268 2269 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2270 2271 tmp &= ~RT2661_DROP_NOT_TO_ME; 2272 if (!(ifp->if_flags & IFF_PROMISC)) 2273 tmp |= RT2661_DROP_NOT_TO_ME; 2274 2275 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2276 2277 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2278 "entering" : "leaving")); 2279 } 2280 2281 /* 2282 * Update QoS (802.11e) settings for each h/w Tx ring. 2283 */ 2284 static int 2285 rt2661_wme_update(struct ieee80211com *ic) 2286 { 2287 struct rt2661_softc *sc = ic->ic_ifp->if_softc; 2288 const struct wmeParams *wmep; 2289 2290 wmep = ic->ic_wme.wme_chanParams.cap_wmeParams; 2291 2292 /* XXX: not sure about shifts. */ 2293 /* XXX: the reference driver plays with AC_VI settings too. */ 2294 2295 /* update TxOp */ 2296 RAL_WRITE(sc, RT2661_AC_TXOP_CSR0, 2297 wmep[WME_AC_BE].wmep_txopLimit << 16 | 2298 wmep[WME_AC_BK].wmep_txopLimit); 2299 RAL_WRITE(sc, RT2661_AC_TXOP_CSR1, 2300 wmep[WME_AC_VI].wmep_txopLimit << 16 | 2301 wmep[WME_AC_VO].wmep_txopLimit); 2302 2303 /* update CWmin */ 2304 RAL_WRITE(sc, RT2661_CWMIN_CSR, 2305 wmep[WME_AC_BE].wmep_logcwmin << 12 | 2306 wmep[WME_AC_BK].wmep_logcwmin << 8 | 2307 wmep[WME_AC_VI].wmep_logcwmin << 4 | 2308 wmep[WME_AC_VO].wmep_logcwmin); 2309 2310 /* update CWmax */ 2311 RAL_WRITE(sc, RT2661_CWMAX_CSR, 2312 wmep[WME_AC_BE].wmep_logcwmax << 12 | 2313 wmep[WME_AC_BK].wmep_logcwmax << 8 | 2314 wmep[WME_AC_VI].wmep_logcwmax << 4 | 2315 wmep[WME_AC_VO].wmep_logcwmax); 2316 2317 /* update Aifsn */ 2318 RAL_WRITE(sc, RT2661_AIFSN_CSR, 2319 wmep[WME_AC_BE].wmep_aifsn << 12 | 2320 wmep[WME_AC_BK].wmep_aifsn << 8 | 2321 wmep[WME_AC_VI].wmep_aifsn << 4 | 2322 wmep[WME_AC_VO].wmep_aifsn); 2323 2324 return 0; 2325 } 2326 2327 static void 2328 rt2661_update_slot(struct ifnet *ifp) 2329 { 2330 struct rt2661_softc *sc = ifp->if_softc; 2331 struct ieee80211com *ic = &sc->sc_ic; 2332 uint8_t slottime; 2333 uint32_t tmp; 2334 2335 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2336 2337 tmp = RAL_READ(sc, RT2661_MAC_CSR9); 2338 tmp = (tmp & ~0xff) | slottime; 2339 RAL_WRITE(sc, RT2661_MAC_CSR9, tmp); 2340 } 2341 2342 static const char * 2343 rt2661_get_rf(int rev) 2344 { 2345 switch (rev) { 2346 case RT2661_RF_5225: return "RT5225"; 2347 case RT2661_RF_5325: return "RT5325 (MIMO XR)"; 2348 case RT2661_RF_2527: return "RT2527"; 2349 case RT2661_RF_2529: return "RT2529 (MIMO XR)"; 2350 default: return "unknown"; 2351 } 2352 } 2353 2354 static void 2355 rt2661_read_eeprom(struct rt2661_softc *sc) 2356 { 2357 struct ieee80211com *ic = &sc->sc_ic; 2358 uint16_t val; 2359 int i; 2360 2361 /* read MAC address */ 2362 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC01); 2363 ic->ic_myaddr[0] = val & 0xff; 2364 ic->ic_myaddr[1] = val >> 8; 2365 2366 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC23); 2367 ic->ic_myaddr[2] = val & 0xff; 2368 ic->ic_myaddr[3] = val >> 8; 2369 2370 val = rt2661_eeprom_read(sc, RT2661_EEPROM_MAC45); 2371 ic->ic_myaddr[4] = val & 0xff; 2372 ic->ic_myaddr[5] = val >> 8; 2373 2374 val = rt2661_eeprom_read(sc, RT2661_EEPROM_ANTENNA); 2375 /* XXX: test if different from 0xffff? */ 2376 sc->rf_rev = (val >> 11) & 0x1f; 2377 sc->hw_radio = (val >> 10) & 0x1; 2378 sc->rx_ant = (val >> 4) & 0x3; 2379 sc->tx_ant = (val >> 2) & 0x3; 2380 sc->nb_ant = val & 0x3; 2381 2382 DPRINTF(("RF revision=%d\n", sc->rf_rev)); 2383 2384 val = rt2661_eeprom_read(sc, RT2661_EEPROM_CONFIG2); 2385 sc->ext_5ghz_lna = (val >> 6) & 0x1; 2386 sc->ext_2ghz_lna = (val >> 4) & 0x1; 2387 2388 DPRINTF(("External 2GHz LNA=%d\nExternal 5GHz LNA=%d\n", 2389 sc->ext_2ghz_lna, sc->ext_5ghz_lna)); 2390 2391 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_2GHZ_OFFSET); 2392 if ((val & 0xff) != 0xff) 2393 sc->rssi_2ghz_corr = (int8_t)(val & 0xff); /* signed */ 2394 2395 val = rt2661_eeprom_read(sc, RT2661_EEPROM_RSSI_5GHZ_OFFSET); 2396 if ((val & 0xff) != 0xff) 2397 sc->rssi_5ghz_corr = (int8_t)(val & 0xff); /* signed */ 2398 2399 /* adjust RSSI correction for external low-noise amplifier */ 2400 if (sc->ext_2ghz_lna) 2401 sc->rssi_2ghz_corr -= 14; 2402 if (sc->ext_5ghz_lna) 2403 sc->rssi_5ghz_corr -= 14; 2404 2405 DPRINTF(("RSSI 2GHz corr=%d\nRSSI 5GHz corr=%d\n", 2406 sc->rssi_2ghz_corr, sc->rssi_5ghz_corr)); 2407 2408 val = rt2661_eeprom_read(sc, RT2661_EEPROM_FREQ_OFFSET); 2409 if ((val >> 8) != 0xff) 2410 sc->rfprog = (val >> 8) & 0x3; 2411 if ((val & 0xff) != 0xff) 2412 sc->rffreq = val & 0xff; 2413 2414 DPRINTF(("RF prog=%d\nRF freq=%d\n", sc->rfprog, sc->rffreq)); 2415 2416 /* read Tx power for all a/b/g channels */ 2417 for (i = 0; i < 19; i++) { 2418 val = rt2661_eeprom_read(sc, RT2661_EEPROM_TXPOWER + i); 2419 sc->txpow[i * 2] = (int8_t)(val >> 8); /* signed */ 2420 DPRINTF(("Channel=%d Tx power=%d\n", 2421 rt2661_rf5225_1[i * 2].chan, sc->txpow[i * 2])); 2422 sc->txpow[i * 2 + 1] = (int8_t)(val & 0xff); /* signed */ 2423 DPRINTF(("Channel=%d Tx power=%d\n", 2424 rt2661_rf5225_1[i * 2 + 1].chan, sc->txpow[i * 2 + 1])); 2425 } 2426 2427 /* read vendor-specific BBP values */ 2428 for (i = 0; i < 16; i++) { 2429 val = rt2661_eeprom_read(sc, RT2661_EEPROM_BBP_BASE + i); 2430 if (val == 0 || val == 0xffff) 2431 continue; /* skip invalid entries */ 2432 sc->bbp_prom[i].reg = val >> 8; 2433 sc->bbp_prom[i].val = val & 0xff; 2434 DPRINTF(("BBP R%d=%02x\n", sc->bbp_prom[i].reg, 2435 sc->bbp_prom[i].val)); 2436 } 2437 } 2438 2439 static int 2440 rt2661_bbp_init(struct rt2661_softc *sc) 2441 { 2442 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2443 int i, ntries; 2444 uint8_t val; 2445 2446 /* wait for BBP to be ready */ 2447 for (ntries = 0; ntries < 100; ntries++) { 2448 val = rt2661_bbp_read(sc, 0); 2449 if (val != 0 && val != 0xff) 2450 break; 2451 DELAY(100); 2452 } 2453 if (ntries == 100) { 2454 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2455 return EIO; 2456 } 2457 2458 /* initialize BBP registers to default values */ 2459 for (i = 0; i < N(rt2661_def_bbp); i++) { 2460 rt2661_bbp_write(sc, rt2661_def_bbp[i].reg, 2461 rt2661_def_bbp[i].val); 2462 } 2463 2464 /* write vendor-specific BBP values (from EEPROM) */ 2465 for (i = 0; i < 16; i++) { 2466 if (sc->bbp_prom[i].reg == 0) 2467 continue; 2468 rt2661_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2469 } 2470 2471 return 0; 2472 #undef N 2473 } 2474 2475 static void 2476 rt2661_init(void *priv) 2477 { 2478 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2479 struct rt2661_softc *sc = priv; 2480 struct ieee80211com *ic = &sc->sc_ic; 2481 struct ifnet *ifp = ic->ic_ifp; 2482 uint32_t tmp, sta[3]; 2483 int i, ntries; 2484 2485 RAL_LOCK(sc); 2486 2487 rt2661_stop(sc); 2488 2489 /* initialize Tx rings */ 2490 RAL_WRITE(sc, RT2661_AC1_BASE_CSR, sc->txq[1].physaddr); 2491 RAL_WRITE(sc, RT2661_AC0_BASE_CSR, sc->txq[0].physaddr); 2492 RAL_WRITE(sc, RT2661_AC2_BASE_CSR, sc->txq[2].physaddr); 2493 RAL_WRITE(sc, RT2661_AC3_BASE_CSR, sc->txq[3].physaddr); 2494 2495 /* initialize Mgt ring */ 2496 RAL_WRITE(sc, RT2661_MGT_BASE_CSR, sc->mgtq.physaddr); 2497 2498 /* initialize Rx ring */ 2499 RAL_WRITE(sc, RT2661_RX_BASE_CSR, sc->rxq.physaddr); 2500 2501 /* initialize Tx rings sizes */ 2502 RAL_WRITE(sc, RT2661_TX_RING_CSR0, 2503 RT2661_TX_RING_COUNT << 24 | 2504 RT2661_TX_RING_COUNT << 16 | 2505 RT2661_TX_RING_COUNT << 8 | 2506 RT2661_TX_RING_COUNT); 2507 2508 RAL_WRITE(sc, RT2661_TX_RING_CSR1, 2509 RT2661_TX_DESC_WSIZE << 16 | 2510 RT2661_TX_RING_COUNT << 8 | /* XXX: HCCA ring unused */ 2511 RT2661_MGT_RING_COUNT); 2512 2513 /* initialize Rx rings */ 2514 RAL_WRITE(sc, RT2661_RX_RING_CSR, 2515 RT2661_RX_DESC_BACK << 16 | 2516 RT2661_RX_DESC_WSIZE << 8 | 2517 RT2661_RX_RING_COUNT); 2518 2519 /* XXX: some magic here */ 2520 RAL_WRITE(sc, RT2661_TX_DMA_DST_CSR, 0xaa); 2521 2522 /* load base addresses of all 5 Tx rings (4 data + 1 mgt) */ 2523 RAL_WRITE(sc, RT2661_LOAD_TX_RING_CSR, 0x1f); 2524 2525 /* load base address of Rx ring */ 2526 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 2); 2527 2528 /* initialize MAC registers to default values */ 2529 for (i = 0; i < N(rt2661_def_mac); i++) 2530 RAL_WRITE(sc, rt2661_def_mac[i].reg, rt2661_def_mac[i].val); 2531 2532 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2533 rt2661_set_macaddr(sc, ic->ic_myaddr); 2534 2535 /* set host ready */ 2536 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2537 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2538 2539 /* wait for BBP/RF to wakeup */ 2540 for (ntries = 0; ntries < 1000; ntries++) { 2541 if (RAL_READ(sc, RT2661_MAC_CSR12) & 8) 2542 break; 2543 DELAY(1000); 2544 } 2545 if (ntries == 1000) { 2546 printf("timeout waiting for BBP/RF to wakeup\n"); 2547 rt2661_stop(sc); 2548 RAL_UNLOCK(sc); 2549 return; 2550 } 2551 2552 if (rt2661_bbp_init(sc) != 0) { 2553 rt2661_stop(sc); 2554 RAL_UNLOCK(sc); 2555 return; 2556 } 2557 2558 /* select default channel */ 2559 sc->sc_curchan = ic->ic_curchan; 2560 rt2661_select_band(sc, sc->sc_curchan); 2561 rt2661_select_antenna(sc); 2562 rt2661_set_chan(sc, sc->sc_curchan); 2563 2564 /* update Rx filter */ 2565 tmp = RAL_READ(sc, RT2661_TXRX_CSR0) & 0xffff; 2566 2567 tmp |= RT2661_DROP_PHY_ERROR | RT2661_DROP_CRC_ERROR; 2568 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2569 tmp |= RT2661_DROP_CTL | RT2661_DROP_VER_ERROR | 2570 RT2661_DROP_ACKCTS; 2571 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2572 tmp |= RT2661_DROP_TODS; 2573 if (!(ifp->if_flags & IFF_PROMISC)) 2574 tmp |= RT2661_DROP_NOT_TO_ME; 2575 } 2576 2577 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2578 2579 /* clear STA registers */ 2580 RAL_READ_REGION_4(sc, RT2661_STA_CSR0, sta, N(sta)); 2581 2582 /* initialize ASIC */ 2583 RAL_WRITE(sc, RT2661_MAC_CSR1, 4); 2584 2585 /* clear any pending interrupt */ 2586 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2587 2588 /* enable interrupts */ 2589 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0x0000ff10); 2590 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0); 2591 2592 /* kick Rx */ 2593 RAL_WRITE(sc, RT2661_RX_CNTL_CSR, 1); 2594 2595 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2596 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2597 2598 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2599 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2600 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2601 } else 2602 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2603 2604 RAL_UNLOCK(sc); 2605 #undef N 2606 } 2607 2608 void 2609 rt2661_stop(void *priv) 2610 { 2611 struct rt2661_softc *sc = priv; 2612 struct ieee80211com *ic = &sc->sc_ic; 2613 struct ifnet *ifp = ic->ic_ifp; 2614 uint32_t tmp; 2615 2616 sc->sc_tx_timer = 0; 2617 ifp->if_timer = 0; 2618 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2619 2620 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2621 2622 /* abort Tx (for all 5 Tx rings) */ 2623 RAL_WRITE(sc, RT2661_TX_CNTL_CSR, 0x1f << 16); 2624 2625 /* disable Rx (value remains after reset!) */ 2626 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2627 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2628 2629 /* reset ASIC */ 2630 RAL_WRITE(sc, RT2661_MAC_CSR1, 3); 2631 RAL_WRITE(sc, RT2661_MAC_CSR1, 0); 2632 2633 /* disable interrupts */ 2634 RAL_WRITE(sc, RT2661_INT_MASK_CSR, 0xffffffff); 2635 RAL_WRITE(sc, RT2661_MCU_INT_MASK_CSR, 0xffffffff); 2636 2637 /* clear any pending interrupt */ 2638 RAL_WRITE(sc, RT2661_INT_SOURCE_CSR, 0xffffffff); 2639 RAL_WRITE(sc, RT2661_MCU_INT_SOURCE_CSR, 0xffffffff); 2640 2641 /* reset Tx and Rx rings */ 2642 rt2661_reset_tx_ring(sc, &sc->txq[0]); 2643 rt2661_reset_tx_ring(sc, &sc->txq[1]); 2644 rt2661_reset_tx_ring(sc, &sc->txq[2]); 2645 rt2661_reset_tx_ring(sc, &sc->txq[3]); 2646 rt2661_reset_tx_ring(sc, &sc->mgtq); 2647 rt2661_reset_rx_ring(sc, &sc->rxq); 2648 } 2649 2650 static int 2651 rt2661_load_microcode(struct rt2661_softc *sc, const uint8_t *ucode, int size) 2652 { 2653 int ntries; 2654 2655 /* reset 8051 */ 2656 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2657 2658 /* cancel any pending Host to MCU command */ 2659 RAL_WRITE(sc, RT2661_H2M_MAILBOX_CSR, 0); 2660 RAL_WRITE(sc, RT2661_M2H_CMD_DONE_CSR, 0xffffffff); 2661 RAL_WRITE(sc, RT2661_HOST_CMD_CSR, 0); 2662 2663 /* write 8051's microcode */ 2664 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET | RT2661_MCU_SEL); 2665 RAL_WRITE_REGION_1(sc, RT2661_MCU_CODE_BASE, ucode, size); 2666 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, RT2661_MCU_RESET); 2667 2668 /* kick 8051's ass */ 2669 RAL_WRITE(sc, RT2661_MCU_CNTL_CSR, 0); 2670 2671 /* wait for 8051 to initialize */ 2672 for (ntries = 0; ntries < 500; ntries++) { 2673 if (RAL_READ(sc, RT2661_MCU_CNTL_CSR) & RT2661_MCU_READY) 2674 break; 2675 DELAY(100); 2676 } 2677 if (ntries == 500) { 2678 printf("timeout waiting for MCU to initialize\n"); 2679 return EIO; 2680 } 2681 return 0; 2682 } 2683 2684 #ifdef notyet 2685 /* 2686 * Dynamically tune Rx sensitivity (BBP register 17) based on average RSSI and 2687 * false CCA count. This function is called periodically (every seconds) when 2688 * in the RUN state. Values taken from the reference driver. 2689 */ 2690 static void 2691 rt2661_rx_tune(struct rt2661_softc *sc) 2692 { 2693 uint8_t bbp17; 2694 uint16_t cca; 2695 int lo, hi, dbm; 2696 2697 /* 2698 * Tuning range depends on operating band and on the presence of an 2699 * external low-noise amplifier. 2700 */ 2701 lo = 0x20; 2702 if (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan)) 2703 lo += 0x08; 2704 if ((IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan) && sc->ext_2ghz_lna) || 2705 (IEEE80211_IS_CHAN_5GHZ(sc->sc_curchan) && sc->ext_5ghz_lna)) 2706 lo += 0x10; 2707 hi = lo + 0x20; 2708 2709 /* retrieve false CCA count since last call (clear on read) */ 2710 cca = RAL_READ(sc, RT2661_STA_CSR1) & 0xffff; 2711 2712 if (dbm >= -35) { 2713 bbp17 = 0x60; 2714 } else if (dbm >= -58) { 2715 bbp17 = hi; 2716 } else if (dbm >= -66) { 2717 bbp17 = lo + 0x10; 2718 } else if (dbm >= -74) { 2719 bbp17 = lo + 0x08; 2720 } else { 2721 /* RSSI < -74dBm, tune using false CCA count */ 2722 2723 bbp17 = sc->bbp17; /* current value */ 2724 2725 hi -= 2 * (-74 - dbm); 2726 if (hi < lo) 2727 hi = lo; 2728 2729 if (bbp17 > hi) { 2730 bbp17 = hi; 2731 2732 } else if (cca > 512) { 2733 if (++bbp17 > hi) 2734 bbp17 = hi; 2735 } else if (cca < 100) { 2736 if (--bbp17 < lo) 2737 bbp17 = lo; 2738 } 2739 } 2740 2741 if (bbp17 != sc->bbp17) { 2742 rt2661_bbp_write(sc, 17, bbp17); 2743 sc->bbp17 = bbp17; 2744 } 2745 } 2746 2747 /* 2748 * Enter/Leave radar detection mode. 2749 * This is for 802.11h additional regulatory domains. 2750 */ 2751 static void 2752 rt2661_radar_start(struct rt2661_softc *sc) 2753 { 2754 uint32_t tmp; 2755 2756 /* disable Rx */ 2757 tmp = RAL_READ(sc, RT2661_TXRX_CSR0); 2758 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp | RT2661_DISABLE_RX); 2759 2760 rt2661_bbp_write(sc, 82, 0x20); 2761 rt2661_bbp_write(sc, 83, 0x00); 2762 rt2661_bbp_write(sc, 84, 0x40); 2763 2764 /* save current BBP registers values */ 2765 sc->bbp18 = rt2661_bbp_read(sc, 18); 2766 sc->bbp21 = rt2661_bbp_read(sc, 21); 2767 sc->bbp22 = rt2661_bbp_read(sc, 22); 2768 sc->bbp16 = rt2661_bbp_read(sc, 16); 2769 sc->bbp17 = rt2661_bbp_read(sc, 17); 2770 sc->bbp64 = rt2661_bbp_read(sc, 64); 2771 2772 rt2661_bbp_write(sc, 18, 0xff); 2773 rt2661_bbp_write(sc, 21, 0x3f); 2774 rt2661_bbp_write(sc, 22, 0x3f); 2775 rt2661_bbp_write(sc, 16, 0xbd); 2776 rt2661_bbp_write(sc, 17, sc->ext_5ghz_lna ? 0x44 : 0x34); 2777 rt2661_bbp_write(sc, 64, 0x21); 2778 2779 /* restore Rx filter */ 2780 RAL_WRITE(sc, RT2661_TXRX_CSR0, tmp); 2781 } 2782 2783 static int 2784 rt2661_radar_stop(struct rt2661_softc *sc) 2785 { 2786 uint8_t bbp66; 2787 2788 /* read radar detection result */ 2789 bbp66 = rt2661_bbp_read(sc, 66); 2790 2791 /* restore BBP registers values */ 2792 rt2661_bbp_write(sc, 16, sc->bbp16); 2793 rt2661_bbp_write(sc, 17, sc->bbp17); 2794 rt2661_bbp_write(sc, 18, sc->bbp18); 2795 rt2661_bbp_write(sc, 21, sc->bbp21); 2796 rt2661_bbp_write(sc, 22, sc->bbp22); 2797 rt2661_bbp_write(sc, 64, sc->bbp64); 2798 2799 return bbp66 == 1; 2800 } 2801 #endif 2802 2803 static int 2804 rt2661_prepare_beacon(struct rt2661_softc *sc) 2805 { 2806 struct ieee80211com *ic = &sc->sc_ic; 2807 struct ieee80211_beacon_offsets bo; 2808 struct rt2661_tx_desc desc; 2809 struct mbuf *m0; 2810 int rate; 2811 2812 m0 = ieee80211_beacon_alloc(ic, ic->ic_bss, &bo); 2813 if (m0 == NULL) { 2814 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2815 return ENOBUFS; 2816 } 2817 2818 /* send beacons at the lowest available rate */ 2819 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_bss->ni_chan) ? 12 : 2; 2820 2821 rt2661_setup_tx_desc(sc, &desc, RT2661_TX_TIMESTAMP, RT2661_TX_HWSEQ, 2822 m0->m_pkthdr.len, rate, NULL, 0, RT2661_QID_MGT); 2823 2824 /* copy the first 24 bytes of Tx descriptor into NIC memory */ 2825 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0, (uint8_t *)&desc, 24); 2826 2827 /* copy beacon header and payload into NIC memory */ 2828 RAL_WRITE_REGION_1(sc, RT2661_HW_BEACON_BASE0 + 24, 2829 mtod(m0, uint8_t *), m0->m_pkthdr.len); 2830 2831 m_freem(m0); 2832 2833 return 0; 2834 } 2835 2836 /* 2837 * Enable TSF synchronization and tell h/w to start sending beacons for IBSS 2838 * and HostAP operating modes. 2839 */ 2840 static void 2841 rt2661_enable_tsf_sync(struct rt2661_softc *sc) 2842 { 2843 struct ieee80211com *ic = &sc->sc_ic; 2844 uint32_t tmp; 2845 2846 if (ic->ic_opmode != IEEE80211_M_STA) { 2847 /* 2848 * Change default 16ms TBTT adjustment to 8ms. 2849 * Must be done before enabling beacon generation. 2850 */ 2851 RAL_WRITE(sc, RT2661_TXRX_CSR10, 1 << 12 | 8); 2852 } 2853 2854 tmp = RAL_READ(sc, RT2661_TXRX_CSR9) & 0xff000000; 2855 2856 /* set beacon interval (in 1/16ms unit) */ 2857 tmp |= ic->ic_bss->ni_intval * 16; 2858 2859 tmp |= RT2661_TSF_TICKING | RT2661_ENABLE_TBTT; 2860 if (ic->ic_opmode == IEEE80211_M_STA) 2861 tmp |= RT2661_TSF_MODE(1); 2862 else 2863 tmp |= RT2661_TSF_MODE(2) | RT2661_GENERATE_BEACON; 2864 2865 RAL_WRITE(sc, RT2661_TXRX_CSR9, tmp); 2866 } 2867 2868 /* 2869 * Retrieve the "Received Signal Strength Indicator" from the raw values 2870 * contained in Rx descriptors. The computation depends on which band the 2871 * frame was received. Correction values taken from the reference driver. 2872 */ 2873 static int 2874 rt2661_get_rssi(struct rt2661_softc *sc, uint8_t raw) 2875 { 2876 int lna, agc, rssi; 2877 2878 lna = (raw >> 5) & 0x3; 2879 agc = raw & 0x1f; 2880 2881 rssi = 2 * agc; 2882 2883 if (IEEE80211_IS_CHAN_2GHZ(sc->sc_curchan)) { 2884 rssi += sc->rssi_2ghz_corr; 2885 2886 if (lna == 1) 2887 rssi -= 64; 2888 else if (lna == 2) 2889 rssi -= 74; 2890 else if (lna == 3) 2891 rssi -= 90; 2892 } else { 2893 rssi += sc->rssi_5ghz_corr; 2894 2895 if (lna == 1) 2896 rssi -= 64; 2897 else if (lna == 2) 2898 rssi -= 86; 2899 else if (lna == 3) 2900 rssi -= 100; 2901 } 2902 return rssi; 2903 } 2904