1 /* 2 * Copyright (c) 2005, 2006 3 * Damien Bergamini <damien.bergamini@free.fr> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 * 17 * $FreeBSD: src/sys/dev/ral/rt2560.c,v 1.3 2006/03/21 21:15:43 damien Exp $ 18 * $DragonFly: src/sys/dev/netif/ral/rt2560.c,v 1.10 2007/02/06 12:38:30 sephe Exp $ 19 */ 20 21 /* 22 * Ralink Technology RT2560 chipset driver 23 * http://www.ralinktech.com/ 24 */ 25 26 #include <sys/param.h> 27 #include <sys/bus.h> 28 #include <sys/endian.h> 29 #include <sys/kernel.h> 30 #include <sys/malloc.h> 31 #include <sys/mbuf.h> 32 #include <sys/module.h> 33 #include <sys/rman.h> 34 #include <sys/socket.h> 35 #include <sys/sockio.h> 36 #include <sys/sysctl.h> 37 #include <sys/serialize.h> 38 39 #include <net/bpf.h> 40 #include <net/if.h> 41 #include <net/if_arp.h> 42 #include <net/ethernet.h> 43 #include <net/if_dl.h> 44 #include <net/if_media.h> 45 #include <net/ifq_var.h> 46 47 #include <netproto/802_11/ieee80211_var.h> 48 #include <netproto/802_11/ieee80211_radiotap.h> 49 50 #include <dev/netif/ral/if_ralrate.h> 51 #include <dev/netif/ral/rt2560reg.h> 52 #include <dev/netif/ral/rt2560var.h> 53 54 #define RT2560_RSSI(sc, rssi) \ 55 ((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ? \ 56 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0) 57 58 #ifdef RAL_DEBUG 59 #define DPRINTF(x) do { if (ral_debug > 0) kprintf x; } while (0) 60 #define DPRINTFN(n, x) do { if (ral_debug >= (n)) kprintf x; } while (0) 61 extern int ral_debug; 62 #else 63 #define DPRINTF(x) 64 #define DPRINTFN(n, x) 65 #endif 66 67 static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 68 int); 69 static void rt2560_dma_map_mbuf(void *, bus_dma_segment_t *, int, 70 bus_size_t, int); 71 static int rt2560_alloc_tx_ring(struct rt2560_softc *, 72 struct rt2560_tx_ring *, int); 73 static void rt2560_reset_tx_ring(struct rt2560_softc *, 74 struct rt2560_tx_ring *); 75 static void rt2560_free_tx_ring(struct rt2560_softc *, 76 struct rt2560_tx_ring *); 77 static int rt2560_alloc_rx_ring(struct rt2560_softc *, 78 struct rt2560_rx_ring *, int); 79 static void rt2560_reset_rx_ring(struct rt2560_softc *, 80 struct rt2560_rx_ring *); 81 static void rt2560_free_rx_ring(struct rt2560_softc *, 82 struct rt2560_rx_ring *); 83 static struct ieee80211_node *rt2560_node_alloc( 84 struct ieee80211_node_table *); 85 static int rt2560_media_change(struct ifnet *); 86 static void rt2560_next_scan(void *); 87 static void rt2560_iter_func(void *, struct ieee80211_node *); 88 static void rt2560_update_rssadapt(void *); 89 static int rt2560_newstate(struct ieee80211com *, 90 enum ieee80211_state, int); 91 static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 92 static void rt2560_encryption_intr(struct rt2560_softc *); 93 static void rt2560_tx_intr(struct rt2560_softc *); 94 static void rt2560_prio_intr(struct rt2560_softc *); 95 static void rt2560_decryption_intr(struct rt2560_softc *); 96 static void rt2560_rx_intr(struct rt2560_softc *); 97 static void rt2560_beacon_expire(struct rt2560_softc *); 98 static void rt2560_wakeup_expire(struct rt2560_softc *); 99 static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 100 static int rt2560_ack_rate(struct ieee80211com *, int); 101 static uint16_t rt2560_txtime(int, int, uint32_t); 102 static uint8_t rt2560_plcp_signal(int); 103 static void rt2560_setup_tx_desc(struct rt2560_softc *, 104 struct rt2560_tx_desc *, uint32_t, int, int, int, 105 bus_addr_t); 106 static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 107 struct ieee80211_node *); 108 static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 109 struct ieee80211_node *); 110 static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 111 struct ieee80211_frame *, uint16_t); 112 static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 113 struct ieee80211_node *); 114 static void rt2560_start(struct ifnet *); 115 static void rt2560_watchdog(struct ifnet *); 116 static int rt2560_reset(struct ifnet *); 117 static int rt2560_ioctl(struct ifnet *, u_long, caddr_t, 118 struct ucred *); 119 static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 120 uint8_t); 121 static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 122 static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 123 uint32_t); 124 static void rt2560_set_chan(struct rt2560_softc *, 125 struct ieee80211_channel *); 126 #if 0 127 static void rt2560_disable_rf_tune(struct rt2560_softc *); 128 #endif 129 static void rt2560_enable_tsf_sync(struct rt2560_softc *); 130 static void rt2560_update_plcp(struct rt2560_softc *); 131 static void rt2560_update_slot(struct ifnet *); 132 static void rt2560_set_basicrates(struct rt2560_softc *); 133 static void rt2560_update_led(struct rt2560_softc *, int, int); 134 static void rt2560_set_bssid(struct rt2560_softc *, uint8_t *); 135 static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 136 static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 137 static void rt2560_update_promisc(struct rt2560_softc *); 138 static const char *rt2560_get_rf(int); 139 static void rt2560_read_eeprom(struct rt2560_softc *); 140 static int rt2560_bbp_init(struct rt2560_softc *); 141 static void rt2560_set_txantenna(struct rt2560_softc *, int); 142 static void rt2560_set_rxantenna(struct rt2560_softc *, int); 143 static void rt2560_init(void *); 144 static void rt2560_stop(void *); 145 static void rt2560_intr(void *); 146 147 /* 148 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 149 */ 150 static const struct ieee80211_rateset rt2560_rateset_11a = 151 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 152 153 static const struct ieee80211_rateset rt2560_rateset_11b = 154 { 4, { 2, 4, 11, 22 } }; 155 156 static const struct ieee80211_rateset rt2560_rateset_11g = 157 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 158 159 static const struct { 160 uint32_t reg; 161 uint32_t val; 162 } rt2560_def_mac[] = { 163 RT2560_DEF_MAC 164 }; 165 166 static const struct { 167 uint8_t reg; 168 uint8_t val; 169 } rt2560_def_bbp[] = { 170 RT2560_DEF_BBP 171 }; 172 173 static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 174 static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 175 static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 176 static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 177 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 178 static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 179 static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 180 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 181 182 static const struct { 183 uint8_t chan; 184 uint32_t r1, r2, r4; 185 } rt2560_rf5222[] = { 186 RT2560_RF5222 187 }; 188 189 int 190 rt2560_attach(device_t dev, int id) 191 { 192 struct rt2560_softc *sc = device_get_softc(dev); 193 struct ieee80211com *ic = &sc->sc_ic; 194 struct ifnet *ifp = &ic->ic_if; 195 int error, i; 196 197 callout_init(&sc->scan_ch); 198 callout_init(&sc->rssadapt_ch); 199 200 sc->sc_irq_rid = 0; 201 sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sc_irq_rid, 202 RF_ACTIVE | RF_SHAREABLE); 203 if (sc->sc_irq == NULL) { 204 device_printf(dev, "could not allocate interrupt resource\n"); 205 return ENXIO; 206 } 207 208 /* retrieve RT2560 rev. no */ 209 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 210 211 /* retrieve MAC address */ 212 rt2560_get_macaddr(sc, ic->ic_myaddr); 213 214 /* retrieve RF rev. no and various other things from EEPROM */ 215 rt2560_read_eeprom(sc); 216 217 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 218 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 219 220 /* 221 * Allocate Tx and Rx rings. 222 */ 223 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 224 if (error != 0) { 225 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 226 goto fail; 227 } 228 229 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 230 if (error != 0) { 231 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 232 goto fail; 233 } 234 235 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 236 if (error != 0) { 237 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 238 goto fail; 239 } 240 241 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 242 if (error != 0) { 243 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 244 goto fail; 245 } 246 247 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 248 if (error != 0) { 249 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 250 goto fail; 251 } 252 253 sysctl_ctx_init(&sc->sysctl_ctx); 254 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 255 SYSCTL_STATIC_CHILDREN(_hw), 256 OID_AUTO, 257 device_get_nameunit(dev), 258 CTLFLAG_RD, 0, ""); 259 if (sc->sysctl_tree == NULL) { 260 device_printf(dev, "could not add sysctl node\n"); 261 error = ENXIO; 262 goto fail; 263 } 264 265 ifp->if_softc = sc; 266 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 267 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 268 ifp->if_init = rt2560_init; 269 ifp->if_ioctl = rt2560_ioctl; 270 ifp->if_start = rt2560_start; 271 ifp->if_watchdog = rt2560_watchdog; 272 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 273 ifq_set_ready(&ifp->if_snd); 274 275 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 276 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 277 ic->ic_state = IEEE80211_S_INIT; 278 279 /* set device capabilities */ 280 ic->ic_caps = 281 IEEE80211_C_IBSS | /* IBSS mode supported */ 282 IEEE80211_C_MONITOR | /* monitor mode supported */ 283 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 284 IEEE80211_C_TXPMGT | /* tx power management */ 285 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 286 IEEE80211_C_SHSLOT | /* short slot time supported */ 287 IEEE80211_C_WEP | /* WEP */ 288 IEEE80211_C_WPA; /* 802.11i */ 289 290 if (sc->rf_rev == RT2560_RF_5222) { 291 /* set supported .11a rates */ 292 ic->ic_sup_rates[IEEE80211_MODE_11A] = rt2560_rateset_11a; 293 294 /* set supported .11a channels */ 295 for (i = 36; i <= 64; i += 4) { 296 ic->ic_channels[i].ic_freq = 297 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 298 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 299 } 300 for (i = 100; i <= 140; i += 4) { 301 ic->ic_channels[i].ic_freq = 302 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 303 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 304 } 305 for (i = 149; i <= 161; i += 4) { 306 ic->ic_channels[i].ic_freq = 307 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 308 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 309 } 310 } 311 312 /* set supported .11b and .11g rates */ 313 ic->ic_sup_rates[IEEE80211_MODE_11B] = rt2560_rateset_11b; 314 ic->ic_sup_rates[IEEE80211_MODE_11G] = rt2560_rateset_11g; 315 316 /* set supported .11b and .11g channels (1 through 14) */ 317 for (i = 1; i <= 14; i++) { 318 ic->ic_channels[i].ic_freq = 319 ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ); 320 ic->ic_channels[i].ic_flags = 321 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 322 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 323 } 324 325 ieee80211_ifattach(ic); 326 ic->ic_node_alloc = rt2560_node_alloc; 327 ic->ic_updateslot = rt2560_update_slot; 328 ic->ic_reset = rt2560_reset; 329 /* enable s/w bmiss handling in sta mode */ 330 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 331 332 /* override state transition machine */ 333 sc->sc_newstate = ic->ic_newstate; 334 ic->ic_newstate = rt2560_newstate; 335 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 336 337 bpfattach_dlt(ifp, DLT_IEEE802_11_RADIO, 338 sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf); 339 340 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 341 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 342 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 343 344 sc->sc_txtap_len = sizeof sc->sc_txtapu; 345 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 346 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 347 348 /* 349 * Add a few sysctl knobs. 350 */ 351 sc->dwelltime = 200; 352 353 SYSCTL_ADD_INT(&sc->sysctl_ctx, 354 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, 355 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 356 357 SYSCTL_ADD_INT(&sc->sysctl_ctx, 358 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, 359 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 360 361 SYSCTL_ADD_INT(&sc->sysctl_ctx, 362 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "dwell", 363 CTLFLAG_RW, &sc->dwelltime, 0, 364 "channel dwell time (ms) for AP/station scanning"); 365 366 error = bus_setup_intr(dev, sc->sc_irq, INTR_MPSAFE, rt2560_intr, 367 sc, &sc->sc_ih, ifp->if_serializer); 368 if (error != 0) { 369 device_printf(dev, "could not set up interrupt\n"); 370 bpfdetach(ifp); 371 ieee80211_ifdetach(ic); 372 goto fail; 373 } 374 375 if (bootverbose) 376 ieee80211_announce(ic); 377 return 0; 378 fail: 379 rt2560_detach(sc); 380 return error; 381 } 382 383 int 384 rt2560_detach(void *xsc) 385 { 386 struct rt2560_softc *sc = xsc; 387 struct ieee80211com *ic = &sc->sc_ic; 388 struct ifnet *ifp = ic->ic_ifp; 389 390 if (device_is_attached(sc->sc_dev)) { 391 lwkt_serialize_enter(ifp->if_serializer); 392 393 callout_stop(&sc->scan_ch); 394 callout_stop(&sc->rssadapt_ch); 395 396 rt2560_stop(sc); 397 bus_teardown_intr(sc->sc_dev, sc->sc_irq, sc->sc_ih); 398 399 lwkt_serialize_exit(ifp->if_serializer); 400 401 bpfdetach(ifp); 402 ieee80211_ifdetach(ic); 403 } 404 405 rt2560_free_tx_ring(sc, &sc->txq); 406 rt2560_free_tx_ring(sc, &sc->atimq); 407 rt2560_free_tx_ring(sc, &sc->prioq); 408 rt2560_free_tx_ring(sc, &sc->bcnq); 409 rt2560_free_rx_ring(sc, &sc->rxq); 410 411 if (sc->sc_irq != NULL) { 412 bus_release_resource(sc->sc_dev, SYS_RES_IRQ, sc->sc_irq_rid, 413 sc->sc_irq); 414 } 415 416 if (sc->sysctl_tree != NULL) 417 sysctl_ctx_free(&sc->sysctl_ctx); 418 419 return 0; 420 } 421 422 void 423 rt2560_shutdown(void *xsc) 424 { 425 struct rt2560_softc *sc = xsc; 426 struct ifnet *ifp = &sc->sc_ic.ic_if; 427 428 lwkt_serialize_enter(ifp->if_serializer); 429 rt2560_stop(sc); 430 lwkt_serialize_exit(ifp->if_serializer); 431 } 432 433 void 434 rt2560_suspend(void *xsc) 435 { 436 struct rt2560_softc *sc = xsc; 437 struct ifnet *ifp = &sc->sc_ic.ic_if; 438 439 lwkt_serialize_enter(ifp->if_serializer); 440 rt2560_stop(sc); 441 lwkt_serialize_exit(ifp->if_serializer); 442 } 443 444 void 445 rt2560_resume(void *xsc) 446 { 447 struct rt2560_softc *sc = xsc; 448 struct ifnet *ifp = sc->sc_ic.ic_ifp; 449 450 lwkt_serialize_enter(ifp->if_serializer); 451 if (ifp->if_flags & IFF_UP) { 452 ifp->if_init(ifp->if_softc); 453 if (ifp->if_flags & IFF_RUNNING) 454 ifp->if_start(ifp); 455 } 456 lwkt_serialize_exit(ifp->if_serializer); 457 } 458 459 static void 460 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 461 { 462 if (error != 0) 463 return; 464 465 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 466 467 *(bus_addr_t *)arg = segs[0].ds_addr; 468 } 469 470 static int 471 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 472 int count) 473 { 474 int i, error; 475 476 ring->count = count; 477 ring->queued = 0; 478 ring->cur = ring->next = 0; 479 ring->cur_encrypt = ring->next_encrypt = 0; 480 481 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 482 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_TX_DESC_SIZE, 1, 483 count * RT2560_TX_DESC_SIZE, 0, &ring->desc_dmat); 484 if (error != 0) { 485 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 486 goto fail; 487 } 488 489 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 490 BUS_DMA_WAITOK | BUS_DMA_ZERO, &ring->desc_map); 491 if (error != 0) { 492 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 493 goto fail; 494 } 495 496 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 497 count * RT2560_TX_DESC_SIZE, 498 rt2560_dma_map_addr, &ring->physaddr, 0); 499 if (error != 0) { 500 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 501 502 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 503 ring->desc = NULL; 504 goto fail; 505 } 506 507 ring->data = kmalloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 508 M_WAITOK | M_ZERO); 509 510 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 511 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2560_MAX_SCATTER, 512 MCLBYTES, 0, &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 return 0; 527 528 fail: rt2560_free_tx_ring(sc, ring); 529 return error; 530 } 531 532 static void 533 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 534 { 535 struct rt2560_tx_desc *desc; 536 struct rt2560_tx_data *data; 537 int i; 538 539 for (i = 0; i < ring->count; i++) { 540 desc = &ring->desc[i]; 541 data = &ring->data[i]; 542 543 if (data->m != NULL) { 544 bus_dmamap_sync(ring->data_dmat, data->map, 545 BUS_DMASYNC_POSTWRITE); 546 bus_dmamap_unload(ring->data_dmat, data->map); 547 m_freem(data->m); 548 data->m = NULL; 549 } 550 551 if (data->ni != NULL) { 552 ieee80211_free_node(data->ni); 553 data->ni = NULL; 554 } 555 556 desc->flags = 0; 557 } 558 559 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 560 561 ring->queued = 0; 562 ring->cur = ring->next = 0; 563 ring->cur_encrypt = ring->next_encrypt = 0; 564 } 565 566 static void 567 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 568 { 569 struct rt2560_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 ring->desc = NULL; 578 } 579 580 if (ring->desc_dmat != NULL) { 581 bus_dma_tag_destroy(ring->desc_dmat); 582 ring->desc_dmat = NULL; 583 } 584 585 if (ring->data != NULL) { 586 for (i = 0; i < ring->count; i++) { 587 data = &ring->data[i]; 588 589 if (data->m != NULL) { 590 bus_dmamap_sync(ring->data_dmat, data->map, 591 BUS_DMASYNC_POSTWRITE); 592 bus_dmamap_unload(ring->data_dmat, data->map); 593 m_freem(data->m); 594 data->m = NULL; 595 } 596 597 if (data->ni != NULL) { 598 ieee80211_free_node(data->ni); 599 data->ni = NULL; 600 } 601 602 if (data->map != NULL) { 603 bus_dmamap_destroy(ring->data_dmat, data->map); 604 data->map = NULL; 605 } 606 } 607 608 kfree(ring->data, M_DEVBUF); 609 ring->data = NULL; 610 } 611 612 if (ring->data_dmat != NULL) { 613 bus_dma_tag_destroy(ring->data_dmat); 614 ring->data_dmat = NULL; 615 } 616 } 617 618 static int 619 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 620 int count) 621 { 622 struct rt2560_rx_desc *desc; 623 struct rt2560_rx_data *data; 624 bus_addr_t physaddr; 625 int i, error; 626 627 ring->count = count; 628 ring->cur = ring->next = 0; 629 ring->cur_decrypt = 0; 630 631 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 632 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_RX_DESC_SIZE, 1, 633 count * RT2560_RX_DESC_SIZE, 0, &ring->desc_dmat); 634 if (error != 0) { 635 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 636 goto fail; 637 } 638 639 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 640 BUS_DMA_WAITOK | BUS_DMA_ZERO, &ring->desc_map); 641 if (error != 0) { 642 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 643 goto fail; 644 } 645 646 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 647 count * RT2560_RX_DESC_SIZE, 648 rt2560_dma_map_addr, &ring->physaddr, 0); 649 if (error != 0) { 650 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 651 652 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 653 ring->desc = NULL; 654 goto fail; 655 } 656 657 ring->data = kmalloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 658 M_WAITOK | M_ZERO); 659 660 /* 661 * Pre-allocate Rx buffers and populate Rx ring. 662 */ 663 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 664 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, 665 &ring->data_dmat); 666 if (error != 0) { 667 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 668 goto fail; 669 } 670 671 for (i = 0; i < count; i++) { 672 desc = &sc->rxq.desc[i]; 673 data = &sc->rxq.data[i]; 674 675 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 676 if (error != 0) { 677 device_printf(sc->sc_dev, "could not create DMA map\n"); 678 goto fail; 679 } 680 681 data->m = m_getcl(MB_WAIT, MT_DATA, M_PKTHDR); 682 if (data->m == NULL) { 683 device_printf(sc->sc_dev, 684 "could not allocate rx mbuf\n"); 685 error = ENOMEM; 686 goto fail; 687 } 688 689 error = bus_dmamap_load(ring->data_dmat, data->map, 690 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 691 &physaddr, 0); 692 if (error != 0) { 693 device_printf(sc->sc_dev, 694 "could not load rx buf DMA map"); 695 696 m_freem(data->m); 697 data->m = NULL; 698 goto fail; 699 } 700 701 desc->flags = htole32(RT2560_RX_BUSY); 702 desc->physaddr = htole32(physaddr); 703 } 704 705 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 706 707 return 0; 708 709 fail: rt2560_free_rx_ring(sc, ring); 710 return error; 711 } 712 713 static void 714 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 715 { 716 int i; 717 718 for (i = 0; i < ring->count; i++) { 719 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 720 ring->data[i].drop = 0; 721 } 722 723 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 724 725 ring->cur = ring->next = 0; 726 ring->cur_decrypt = 0; 727 } 728 729 static void 730 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 731 { 732 struct rt2560_rx_data *data; 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 ring->desc = NULL; 740 } 741 742 if (ring->desc_dmat != NULL) { 743 bus_dma_tag_destroy(ring->desc_dmat); 744 ring->desc_dmat = NULL; 745 } 746 747 if (ring->data != NULL) { 748 int i; 749 750 for (i = 0; i < ring->count; i++) { 751 data = &ring->data[i]; 752 753 if (data->m != NULL) { 754 bus_dmamap_sync(ring->data_dmat, data->map, 755 BUS_DMASYNC_POSTREAD); 756 bus_dmamap_unload(ring->data_dmat, data->map); 757 m_freem(data->m); 758 data->m = NULL; 759 } 760 761 if (data->map != NULL) { 762 bus_dmamap_destroy(ring->data_dmat, data->map); 763 data->map = NULL; 764 } 765 } 766 767 kfree(ring->data, M_DEVBUF); 768 ring->data = NULL; 769 } 770 771 if (ring->data_dmat != NULL) { 772 bus_dma_tag_destroy(ring->data_dmat); 773 ring->data_dmat = NULL; 774 } 775 } 776 777 static struct ieee80211_node * 778 rt2560_node_alloc(struct ieee80211_node_table *nt) 779 { 780 struct rt2560_node *rn; 781 782 rn = kmalloc(sizeof(struct rt2560_node), M_80211_NODE, 783 M_NOWAIT | M_ZERO); 784 785 return (rn != NULL) ? &rn->ni : NULL; 786 } 787 788 static int 789 rt2560_media_change(struct ifnet *ifp) 790 { 791 struct rt2560_softc *sc = ifp->if_softc; 792 int error; 793 794 error = ieee80211_media_change(ifp); 795 if (error != ENETRESET) 796 return error; 797 798 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) 799 rt2560_init(sc); 800 return 0; 801 } 802 803 /* 804 * This function is called periodically (every 200ms) during scanning to 805 * switch from one channel to another. 806 */ 807 static void 808 rt2560_next_scan(void *arg) 809 { 810 struct rt2560_softc *sc = arg; 811 struct ieee80211com *ic = &sc->sc_ic; 812 struct ifnet *ifp = ic->ic_ifp; 813 814 lwkt_serialize_enter(ifp->if_serializer); 815 if (ic->ic_state == IEEE80211_S_SCAN) 816 ieee80211_next_scan(ic); 817 lwkt_serialize_exit(ifp->if_serializer); 818 } 819 820 /* 821 * This function is called for each node present in the node station table. 822 */ 823 static void 824 rt2560_iter_func(void *arg, struct ieee80211_node *ni) 825 { 826 struct rt2560_node *rn = (struct rt2560_node *)ni; 827 828 ral_rssadapt_updatestats(&rn->rssadapt); 829 } 830 831 /* 832 * This function is called periodically (every 100ms) in RUN state to update 833 * the rate adaptation statistics. 834 */ 835 static void 836 rt2560_update_rssadapt(void *arg) 837 { 838 struct rt2560_softc *sc = arg; 839 struct ieee80211com *ic = &sc->sc_ic; 840 struct ifnet *ifp = ic->ic_ifp; 841 842 lwkt_serialize_enter(ifp->if_serializer); 843 844 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 845 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 846 847 lwkt_serialize_exit(ifp->if_serializer); 848 } 849 850 static int 851 rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 852 { 853 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 854 enum ieee80211_state ostate; 855 struct ieee80211_node *ni; 856 struct mbuf *m; 857 int error = 0; 858 859 ostate = ic->ic_state; 860 callout_stop(&sc->scan_ch); 861 862 switch (nstate) { 863 case IEEE80211_S_INIT: 864 callout_stop(&sc->rssadapt_ch); 865 866 if (ostate == IEEE80211_S_RUN) { 867 /* abort TSF synchronization */ 868 RAL_WRITE(sc, RT2560_CSR14, 0); 869 870 /* turn association led off */ 871 rt2560_update_led(sc, 0, 0); 872 } 873 break; 874 875 case IEEE80211_S_SCAN: 876 rt2560_set_chan(sc, ic->ic_curchan); 877 callout_reset(&sc->scan_ch, (sc->dwelltime * hz) / 1000, 878 rt2560_next_scan, sc); 879 break; 880 881 case IEEE80211_S_AUTH: 882 rt2560_set_chan(sc, ic->ic_curchan); 883 break; 884 885 case IEEE80211_S_ASSOC: 886 rt2560_set_chan(sc, ic->ic_curchan); 887 break; 888 889 case IEEE80211_S_RUN: 890 rt2560_set_chan(sc, ic->ic_curchan); 891 892 ni = ic->ic_bss; 893 894 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 895 rt2560_update_plcp(sc); 896 rt2560_set_basicrates(sc); 897 rt2560_set_bssid(sc, ni->ni_bssid); 898 } 899 900 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 901 ic->ic_opmode == IEEE80211_M_IBSS) { 902 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 903 if (m == NULL) { 904 device_printf(sc->sc_dev, 905 "could not allocate beacon\n"); 906 error = ENOBUFS; 907 break; 908 } 909 910 ieee80211_ref_node(ni); 911 error = rt2560_tx_bcn(sc, m, ni); 912 if (error != 0) 913 break; 914 } 915 916 /* turn assocation led on */ 917 rt2560_update_led(sc, 1, 0); 918 919 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 920 callout_reset(&sc->rssadapt_ch, hz / 10, 921 rt2560_update_rssadapt, sc); 922 923 rt2560_enable_tsf_sync(sc); 924 } 925 break; 926 } 927 928 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 929 } 930 931 /* 932 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 933 * 93C66). 934 */ 935 static uint16_t 936 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 937 { 938 uint32_t tmp; 939 uint16_t val; 940 int n; 941 942 /* clock C once before the first command */ 943 RT2560_EEPROM_CTL(sc, 0); 944 945 RT2560_EEPROM_CTL(sc, RT2560_S); 946 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 947 RT2560_EEPROM_CTL(sc, RT2560_S); 948 949 /* write start bit (1) */ 950 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 951 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 952 953 /* write READ opcode (10) */ 954 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 955 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 956 RT2560_EEPROM_CTL(sc, RT2560_S); 957 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 958 959 /* write address (A5-A0 or A7-A0) */ 960 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 961 for (; n >= 0; n--) { 962 RT2560_EEPROM_CTL(sc, RT2560_S | 963 (((addr >> n) & 1) << RT2560_SHIFT_D)); 964 RT2560_EEPROM_CTL(sc, RT2560_S | 965 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 966 } 967 968 RT2560_EEPROM_CTL(sc, RT2560_S); 969 970 /* read data Q15-Q0 */ 971 val = 0; 972 for (n = 15; n >= 0; n--) { 973 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 974 tmp = RAL_READ(sc, RT2560_CSR21); 975 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 976 RT2560_EEPROM_CTL(sc, RT2560_S); 977 } 978 979 RT2560_EEPROM_CTL(sc, 0); 980 981 /* clear Chip Select and clock C */ 982 RT2560_EEPROM_CTL(sc, RT2560_S); 983 RT2560_EEPROM_CTL(sc, 0); 984 RT2560_EEPROM_CTL(sc, RT2560_C); 985 986 return val; 987 } 988 989 /* 990 * Some frames were processed by the hardware cipher engine and are ready for 991 * transmission. 992 */ 993 static void 994 rt2560_encryption_intr(struct rt2560_softc *sc) 995 { 996 struct rt2560_tx_desc *desc; 997 int hw; 998 999 /* retrieve last descriptor index processed by cipher engine */ 1000 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 1001 hw /= RT2560_TX_DESC_SIZE; 1002 1003 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1004 BUS_DMASYNC_POSTREAD); 1005 1006 for (; sc->txq.next_encrypt != hw;) { 1007 desc = &sc->txq.desc[sc->txq.next_encrypt]; 1008 1009 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1010 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 1011 break; 1012 1013 /* for TKIP, swap eiv field to fix a bug in ASIC */ 1014 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 1015 RT2560_TX_CIPHER_TKIP) 1016 desc->eiv = bswap32(desc->eiv); 1017 1018 /* mark the frame ready for transmission */ 1019 desc->flags |= htole32(RT2560_TX_VALID); 1020 desc->flags |= htole32(RT2560_TX_BUSY); 1021 1022 DPRINTFN(15, ("encryption done idx=%u\n", 1023 sc->txq.next_encrypt)); 1024 1025 sc->txq.next_encrypt = 1026 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 1027 } 1028 1029 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1030 BUS_DMASYNC_PREWRITE); 1031 1032 /* kick Tx */ 1033 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 1034 } 1035 1036 static void 1037 rt2560_tx_intr(struct rt2560_softc *sc) 1038 { 1039 struct ieee80211com *ic = &sc->sc_ic; 1040 struct ifnet *ifp = ic->ic_ifp; 1041 struct rt2560_tx_desc *desc; 1042 struct rt2560_tx_data *data; 1043 struct rt2560_node *rn; 1044 1045 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1046 BUS_DMASYNC_POSTREAD); 1047 1048 for (;;) { 1049 desc = &sc->txq.desc[sc->txq.next]; 1050 data = &sc->txq.data[sc->txq.next]; 1051 1052 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1053 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 1054 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1055 break; 1056 1057 rn = (struct rt2560_node *)data->ni; 1058 1059 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1060 case RT2560_TX_SUCCESS: 1061 DPRINTFN(10, ("data frame sent successfully\n")); 1062 if (data->id.id_node != NULL) { 1063 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 1064 &data->id); 1065 } 1066 ifp->if_opackets++; 1067 break; 1068 1069 case RT2560_TX_SUCCESS_RETRY: 1070 DPRINTFN(9, ("data frame sent after %u retries\n", 1071 (le32toh(desc->flags) >> 5) & 0x7)); 1072 ifp->if_opackets++; 1073 break; 1074 1075 case RT2560_TX_FAIL_RETRY: 1076 DPRINTFN(9, ("sending data frame failed (too much " 1077 "retries)\n")); 1078 if (data->id.id_node != NULL) { 1079 ral_rssadapt_lower_rate(ic, data->ni, 1080 &rn->rssadapt, &data->id); 1081 } 1082 ifp->if_oerrors++; 1083 break; 1084 1085 case RT2560_TX_FAIL_INVALID: 1086 case RT2560_TX_FAIL_OTHER: 1087 default: 1088 device_printf(sc->sc_dev, "sending data frame failed " 1089 "0x%08x\n", le32toh(desc->flags)); 1090 ifp->if_oerrors++; 1091 } 1092 1093 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1094 BUS_DMASYNC_POSTWRITE); 1095 bus_dmamap_unload(sc->txq.data_dmat, data->map); 1096 m_freem(data->m); 1097 data->m = NULL; 1098 ieee80211_free_node(data->ni); 1099 data->ni = NULL; 1100 1101 /* descriptor is no longer valid */ 1102 desc->flags &= ~htole32(RT2560_TX_VALID); 1103 1104 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 1105 1106 sc->txq.queued--; 1107 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 1108 } 1109 1110 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1111 BUS_DMASYNC_PREWRITE); 1112 1113 sc->sc_tx_timer = 0; 1114 ifp->if_flags &= ~IFF_OACTIVE; 1115 rt2560_start(ifp); 1116 } 1117 1118 static void 1119 rt2560_prio_intr(struct rt2560_softc *sc) 1120 { 1121 struct ieee80211com *ic = &sc->sc_ic; 1122 struct ifnet *ifp = ic->ic_ifp; 1123 struct rt2560_tx_desc *desc; 1124 struct rt2560_tx_data *data; 1125 1126 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1127 BUS_DMASYNC_POSTREAD); 1128 1129 for (;;) { 1130 desc = &sc->prioq.desc[sc->prioq.next]; 1131 data = &sc->prioq.data[sc->prioq.next]; 1132 1133 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1134 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1135 break; 1136 1137 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1138 case RT2560_TX_SUCCESS: 1139 DPRINTFN(10, ("mgt frame sent successfully\n")); 1140 break; 1141 1142 case RT2560_TX_SUCCESS_RETRY: 1143 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1144 (le32toh(desc->flags) >> 5) & 0x7)); 1145 break; 1146 1147 case RT2560_TX_FAIL_RETRY: 1148 DPRINTFN(9, ("sending mgt frame failed (too much " 1149 "retries)\n")); 1150 break; 1151 1152 case RT2560_TX_FAIL_INVALID: 1153 case RT2560_TX_FAIL_OTHER: 1154 default: 1155 device_printf(sc->sc_dev, "sending mgt frame failed " 1156 "0x%08x\n", le32toh(desc->flags)); 1157 } 1158 1159 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1160 BUS_DMASYNC_POSTWRITE); 1161 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1162 m_freem(data->m); 1163 data->m = NULL; 1164 ieee80211_free_node(data->ni); 1165 data->ni = NULL; 1166 1167 /* descriptor is no longer valid */ 1168 desc->flags &= ~htole32(RT2560_TX_VALID); 1169 1170 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1171 1172 sc->prioq.queued--; 1173 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1174 } 1175 1176 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1177 BUS_DMASYNC_PREWRITE); 1178 1179 sc->sc_tx_timer = 0; 1180 ifp->if_flags &= ~IFF_OACTIVE; 1181 rt2560_start(ifp); 1182 } 1183 1184 /* 1185 * Some frames were processed by the hardware cipher engine and are ready for 1186 * transmission to the IEEE802.11 layer. 1187 */ 1188 static void 1189 rt2560_decryption_intr(struct rt2560_softc *sc) 1190 { 1191 struct ieee80211com *ic = &sc->sc_ic; 1192 struct ifnet *ifp = ic->ic_ifp; 1193 struct rt2560_rx_desc *desc; 1194 struct rt2560_rx_data *data; 1195 bus_addr_t physaddr; 1196 struct ieee80211_frame *wh; 1197 struct ieee80211_node *ni; 1198 struct rt2560_node *rn; 1199 struct mbuf *mnew, *m; 1200 int hw, error; 1201 1202 /* retrieve last decriptor index processed by cipher engine */ 1203 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1204 hw /= RT2560_RX_DESC_SIZE; 1205 1206 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1207 BUS_DMASYNC_POSTREAD); 1208 1209 for (; sc->rxq.cur_decrypt != hw;) { 1210 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1211 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1212 1213 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1214 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1215 break; 1216 1217 if (data->drop) { 1218 ifp->if_ierrors++; 1219 goto skip; 1220 } 1221 1222 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1223 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1224 ifp->if_ierrors++; 1225 goto skip; 1226 } 1227 1228 /* 1229 * Try to allocate a new mbuf for this ring element and load it 1230 * before processing the current mbuf. If the ring element 1231 * cannot be loaded, drop the received packet and reuse the old 1232 * mbuf. In the unlikely case that the old mbuf can't be 1233 * reloaded either, explicitly panic. 1234 */ 1235 mnew = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR); 1236 if (mnew == NULL) { 1237 ifp->if_ierrors++; 1238 goto skip; 1239 } 1240 1241 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1242 BUS_DMASYNC_POSTREAD); 1243 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1244 1245 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1246 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1247 &physaddr, 0); 1248 if (error != 0) { 1249 m_freem(mnew); 1250 1251 /* try to reload the old mbuf */ 1252 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1253 mtod(data->m, void *), MCLBYTES, 1254 rt2560_dma_map_addr, &physaddr, 0); 1255 if (error != 0) { 1256 /* very unlikely that it will fail... */ 1257 panic("%s: could not load old rx mbuf", 1258 device_get_name(sc->sc_dev)); 1259 } 1260 ifp->if_ierrors++; 1261 goto skip; 1262 } 1263 1264 /* 1265 * New mbuf successfully loaded, update Rx ring and continue 1266 * processing. 1267 */ 1268 m = data->m; 1269 data->m = mnew; 1270 desc->physaddr = htole32(physaddr); 1271 1272 /* finalize mbuf */ 1273 m->m_pkthdr.rcvif = ifp; 1274 m->m_pkthdr.len = m->m_len = 1275 (le32toh(desc->flags) >> 16) & 0xfff; 1276 1277 if (sc->sc_drvbpf != NULL) { 1278 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1279 uint32_t tsf_lo, tsf_hi; 1280 1281 /* get timestamp (low and high 32 bits) */ 1282 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1283 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1284 1285 tap->wr_tsf = 1286 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1287 tap->wr_flags = 0; 1288 tap->wr_rate = rt2560_rxrate(desc); 1289 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1290 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1291 tap->wr_antenna = sc->rx_ant; 1292 tap->wr_antsignal = RT2560_RSSI(sc, desc->rssi); 1293 1294 bpf_ptap(sc->sc_drvbpf, m, tap, sc->sc_rxtap_len); 1295 } 1296 1297 wh = mtod(m, struct ieee80211_frame *); 1298 ni = ieee80211_find_rxnode(ic, 1299 (struct ieee80211_frame_min *)wh); 1300 1301 /* send the frame to the 802.11 layer */ 1302 ieee80211_input(ic, m, ni, RT2560_RSSI(sc, desc->rssi), 0); 1303 1304 /* give rssi to the rate adatation algorithm */ 1305 rn = (struct rt2560_node *)ni; 1306 ral_rssadapt_input(ic, ni, &rn->rssadapt, 1307 RT2560_RSSI(sc, desc->rssi)); 1308 1309 /* node is no longer needed */ 1310 ieee80211_free_node(ni); 1311 1312 skip: desc->flags = htole32(RT2560_RX_BUSY); 1313 1314 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1315 1316 sc->rxq.cur_decrypt = 1317 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT; 1318 } 1319 1320 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1321 BUS_DMASYNC_PREWRITE); 1322 } 1323 1324 /* 1325 * Some frames were received. Pass them to the hardware cipher engine before 1326 * sending them to the 802.11 layer. 1327 */ 1328 static void 1329 rt2560_rx_intr(struct rt2560_softc *sc) 1330 { 1331 struct rt2560_rx_desc *desc; 1332 struct rt2560_rx_data *data; 1333 1334 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1335 BUS_DMASYNC_POSTREAD); 1336 1337 for (;;) { 1338 desc = &sc->rxq.desc[sc->rxq.cur]; 1339 data = &sc->rxq.data[sc->rxq.cur]; 1340 1341 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1342 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1343 break; 1344 1345 data->drop = 0; 1346 1347 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1348 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1349 /* 1350 * This should not happen since we did not request 1351 * to receive those frames when we filled RXCSR0. 1352 */ 1353 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1354 le32toh(desc->flags))); 1355 data->drop = 1; 1356 } 1357 1358 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1359 DPRINTFN(5, ("bad length\n")); 1360 data->drop = 1; 1361 } 1362 1363 /* mark the frame for decryption */ 1364 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1365 1366 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1367 1368 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1369 } 1370 1371 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1372 BUS_DMASYNC_PREWRITE); 1373 1374 /* kick decrypt */ 1375 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1376 } 1377 1378 /* 1379 * This function is called periodically in IBSS mode when a new beacon must be 1380 * sent out. 1381 */ 1382 static void 1383 rt2560_beacon_expire(struct rt2560_softc *sc) 1384 { 1385 struct ieee80211com *ic = &sc->sc_ic; 1386 struct rt2560_tx_data *data; 1387 1388 if (ic->ic_opmode != IEEE80211_M_IBSS && 1389 ic->ic_opmode != IEEE80211_M_HOSTAP) 1390 return; 1391 1392 data = &sc->bcnq.data[sc->bcnq.next]; 1393 1394 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1395 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1396 1397 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1398 1399 if (ic->ic_rawbpf != NULL) 1400 bpf_mtap(ic->ic_rawbpf, data->m); 1401 1402 rt2560_tx_bcn(sc, data->m, data->ni); 1403 1404 DPRINTFN(15, ("beacon expired\n")); 1405 1406 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1407 } 1408 1409 /* ARGSUSED */ 1410 static void 1411 rt2560_wakeup_expire(struct rt2560_softc *sc) 1412 { 1413 DPRINTFN(2, ("wakeup expired\n")); 1414 } 1415 1416 static void 1417 rt2560_intr(void *arg) 1418 { 1419 struct rt2560_softc *sc = arg; 1420 struct ifnet *ifp = &sc->sc_ic.ic_if; 1421 uint32_t r; 1422 1423 /* disable interrupts */ 1424 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1425 1426 /* don't re-enable interrupts if we're shutting down */ 1427 if (!(ifp->if_flags & IFF_RUNNING)) 1428 return; 1429 1430 r = RAL_READ(sc, RT2560_CSR7); 1431 RAL_WRITE(sc, RT2560_CSR7, r); 1432 1433 if (r & RT2560_BEACON_EXPIRE) 1434 rt2560_beacon_expire(sc); 1435 1436 if (r & RT2560_WAKEUP_EXPIRE) 1437 rt2560_wakeup_expire(sc); 1438 1439 if (r & RT2560_PRIO_DONE) 1440 rt2560_prio_intr(sc); 1441 1442 if (r & (RT2560_TX_DONE | RT2560_ENCRYPTION_DONE)) { 1443 int i; 1444 1445 for (i = 0; i < 2; ++i) { 1446 rt2560_tx_intr(sc); 1447 rt2560_encryption_intr(sc); 1448 } 1449 } 1450 1451 if (r & (RT2560_DECRYPTION_DONE | RT2560_RX_DONE)) { 1452 int i; 1453 1454 for (i = 0; i < 2; ++i) { 1455 rt2560_decryption_intr(sc); 1456 rt2560_rx_intr(sc); 1457 } 1458 } 1459 1460 /* re-enable interrupts */ 1461 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1462 } 1463 1464 /* quickly determine if a given rate is CCK or OFDM */ 1465 #define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1466 1467 #define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1468 #define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1469 1470 #define RAL_SIFS 10 /* us */ 1471 1472 #define RT2560_TXRX_TURNAROUND 10 /* us */ 1473 1474 /* 1475 * This function is only used by the Rx radiotap code. 1476 */ 1477 static uint8_t 1478 rt2560_rxrate(struct rt2560_rx_desc *desc) 1479 { 1480 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1481 /* reverse function of rt2560_plcp_signal */ 1482 switch (desc->rate) { 1483 case 0xb: return 12; 1484 case 0xf: return 18; 1485 case 0xa: return 24; 1486 case 0xe: return 36; 1487 case 0x9: return 48; 1488 case 0xd: return 72; 1489 case 0x8: return 96; 1490 case 0xc: return 108; 1491 } 1492 } else { 1493 if (desc->rate == 10) 1494 return 2; 1495 if (desc->rate == 20) 1496 return 4; 1497 if (desc->rate == 55) 1498 return 11; 1499 if (desc->rate == 110) 1500 return 22; 1501 } 1502 return 2; /* should not get there */ 1503 } 1504 1505 /* 1506 * Return the expected ack rate for a frame transmitted at rate `rate'. 1507 * XXX: this should depend on the destination node basic rate set. 1508 */ 1509 static int 1510 rt2560_ack_rate(struct ieee80211com *ic, int rate) 1511 { 1512 switch (rate) { 1513 /* CCK rates */ 1514 case 2: 1515 return 2; 1516 case 4: 1517 case 11: 1518 case 22: 1519 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1520 1521 /* OFDM rates */ 1522 case 12: 1523 case 18: 1524 return 12; 1525 case 24: 1526 case 36: 1527 return 24; 1528 case 48: 1529 case 72: 1530 case 96: 1531 case 108: 1532 return 48; 1533 } 1534 1535 /* default to 1Mbps */ 1536 return 2; 1537 } 1538 1539 /* 1540 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1541 * The function automatically determines the operating mode depending on the 1542 * given rate. `flags' indicates whether short preamble is in use or not. 1543 */ 1544 static uint16_t 1545 rt2560_txtime(int len, int rate, uint32_t flags) 1546 { 1547 uint16_t txtime; 1548 1549 if (RAL_RATE_IS_OFDM(rate)) { 1550 /* IEEE Std 802.11a-1999, pp. 37 */ 1551 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1552 txtime = 16 + 4 + 4 * txtime + 6; 1553 } else { 1554 /* IEEE Std 802.11b-1999, pp. 28 */ 1555 txtime = (16 * len + rate - 1) / rate; 1556 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1557 txtime += 72 + 24; 1558 else 1559 txtime += 144 + 48; 1560 } 1561 1562 return txtime; 1563 } 1564 1565 static uint8_t 1566 rt2560_plcp_signal(int rate) 1567 { 1568 switch (rate) { 1569 /* CCK rates (returned values are device-dependent) */ 1570 case 2: return 0x0; 1571 case 4: return 0x1; 1572 case 11: return 0x2; 1573 case 22: return 0x3; 1574 1575 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1576 case 12: return 0xb; 1577 case 18: return 0xf; 1578 case 24: return 0xa; 1579 case 36: return 0xe; 1580 case 48: return 0x9; 1581 case 72: return 0xd; 1582 case 96: return 0x8; 1583 case 108: return 0xc; 1584 1585 /* unsupported rates (should not get there) */ 1586 default: return 0xff; 1587 } 1588 } 1589 1590 static void 1591 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1592 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1593 { 1594 struct ieee80211com *ic = &sc->sc_ic; 1595 uint16_t plcp_length; 1596 int remainder; 1597 1598 desc->flags = htole32(flags); 1599 desc->flags |= htole32(len << 16); 1600 if (!encrypt) 1601 desc->flags |= htole32(RT2560_TX_VALID); 1602 1603 desc->physaddr = htole32(physaddr); 1604 desc->wme = htole16( 1605 RT2560_AIFSN(2) | 1606 RT2560_LOGCWMIN(3) | 1607 RT2560_LOGCWMAX(8)); 1608 1609 /* setup PLCP fields */ 1610 desc->plcp_signal = rt2560_plcp_signal(rate); 1611 desc->plcp_service = 4; 1612 1613 len += IEEE80211_CRC_LEN; 1614 if (RAL_RATE_IS_OFDM(rate)) { 1615 desc->flags |= htole32(RT2560_TX_OFDM); 1616 1617 plcp_length = len & 0xfff; 1618 desc->plcp_length_hi = plcp_length >> 6; 1619 desc->plcp_length_lo = plcp_length & 0x3f; 1620 } else { 1621 plcp_length = (16 * len + rate - 1) / rate; 1622 if (rate == 22) { 1623 remainder = (16 * len) % 22; 1624 if (remainder != 0 && remainder < 7) 1625 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1626 } 1627 desc->plcp_length_hi = plcp_length >> 8; 1628 desc->plcp_length_lo = plcp_length & 0xff; 1629 1630 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1631 desc->plcp_signal |= 0x08; 1632 } 1633 1634 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) 1635 : htole32(RT2560_TX_BUSY); 1636 } 1637 1638 static int 1639 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1640 struct ieee80211_node *ni) 1641 { 1642 struct ieee80211com *ic = &sc->sc_ic; 1643 struct rt2560_tx_desc *desc; 1644 struct rt2560_tx_data *data; 1645 bus_addr_t paddr; 1646 int rate, error; 1647 1648 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1649 data = &sc->bcnq.data[sc->bcnq.cur]; 1650 1651 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1652 1653 error = bus_dmamap_load_mbuf(sc->bcnq.data_dmat, data->map, m0, 1654 rt2560_dma_map_mbuf, &paddr, 1655 BUS_DMA_NOWAIT); 1656 if (error != 0) { 1657 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1658 error); 1659 m_freem(m0); 1660 return error; 1661 } 1662 1663 if (sc->sc_drvbpf != NULL) { 1664 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1665 1666 tap->wt_flags = 0; 1667 tap->wt_rate = rate; 1668 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1669 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1670 tap->wt_antenna = sc->tx_ant; 1671 1672 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len); 1673 } 1674 1675 data->m = m0; 1676 data->ni = ni; 1677 1678 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1679 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, paddr); 1680 1681 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1682 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1683 1684 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1685 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1686 BUS_DMASYNC_PREWRITE); 1687 1688 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1689 1690 return 0; 1691 } 1692 1693 static int 1694 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1695 struct ieee80211_node *ni) 1696 { 1697 struct ieee80211com *ic = &sc->sc_ic; 1698 struct rt2560_tx_desc *desc; 1699 struct rt2560_tx_data *data; 1700 struct ieee80211_frame *wh; 1701 bus_addr_t paddr; 1702 uint16_t dur; 1703 uint32_t flags = 0; 1704 int rate, error; 1705 1706 desc = &sc->prioq.desc[sc->prioq.cur]; 1707 data = &sc->prioq.data[sc->prioq.cur]; 1708 1709 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1710 1711 error = bus_dmamap_load_mbuf(sc->prioq.data_dmat, data->map, m0, 1712 rt2560_dma_map_mbuf, &paddr, 0); 1713 if (error != 0) { 1714 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1715 error); 1716 m_freem(m0); 1717 return error; 1718 } 1719 1720 if (sc->sc_drvbpf != NULL) { 1721 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1722 1723 tap->wt_flags = 0; 1724 tap->wt_rate = rate; 1725 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1726 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1727 tap->wt_antenna = sc->tx_ant; 1728 1729 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len); 1730 } 1731 1732 data->m = m0; 1733 data->ni = ni; 1734 1735 wh = mtod(m0, struct ieee80211_frame *); 1736 1737 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1738 flags |= RT2560_TX_ACK; 1739 1740 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1741 RAL_SIFS; 1742 *(uint16_t *)wh->i_dur = htole16(dur); 1743 1744 /* tell hardware to add timestamp for probe responses */ 1745 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1746 IEEE80211_FC0_TYPE_MGT && 1747 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1748 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1749 flags |= RT2560_TX_TIMESTAMP; 1750 } 1751 1752 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, paddr); 1753 1754 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1755 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1756 BUS_DMASYNC_PREWRITE); 1757 1758 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1759 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1760 1761 /* kick prio */ 1762 sc->prioq.queued++; 1763 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1764 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1765 1766 return 0; 1767 } 1768 1769 /* 1770 * Build a RTS control frame. 1771 */ 1772 static struct mbuf * 1773 rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1774 uint16_t dur) 1775 { 1776 struct ieee80211_frame_rts *rts; 1777 struct mbuf *m; 1778 1779 MGETHDR(m, MB_DONTWAIT, MT_DATA); 1780 if (m == NULL) { 1781 sc->sc_ic.ic_stats.is_tx_nobuf++; 1782 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1783 return NULL; 1784 } 1785 1786 rts = mtod(m, struct ieee80211_frame_rts *); 1787 1788 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1789 IEEE80211_FC0_SUBTYPE_RTS; 1790 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1791 *(uint16_t *)rts->i_dur = htole16(dur); 1792 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1793 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1794 1795 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 1796 1797 return m; 1798 } 1799 1800 static int 1801 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1802 struct ieee80211_node *ni) 1803 { 1804 struct ieee80211com *ic = &sc->sc_ic; 1805 struct rt2560_tx_desc *desc; 1806 struct rt2560_tx_data *data; 1807 struct rt2560_node *rn; 1808 struct ieee80211_rateset *rs; 1809 struct ieee80211_frame *wh; 1810 struct ieee80211_key *k; 1811 struct mbuf *mnew; 1812 bus_addr_t paddr; 1813 uint16_t dur; 1814 uint32_t flags = 0; 1815 int rate, error; 1816 1817 wh = mtod(m0, struct ieee80211_frame *); 1818 1819 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1820 rs = &ic->ic_sup_rates[ic->ic_curmode]; 1821 rate = rs->rs_rates[ic->ic_fixed_rate]; 1822 } else { 1823 rs = &ni->ni_rates; 1824 rn = (struct rt2560_node *)ni; 1825 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1826 m0->m_pkthdr.len, NULL, 0); 1827 rate = rs->rs_rates[ni->ni_txrate]; 1828 } 1829 rate &= IEEE80211_RATE_VAL; 1830 1831 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1832 k = ieee80211_crypto_encap(ic, ni, m0); 1833 if (k == NULL) { 1834 m_freem(m0); 1835 return ENOBUFS; 1836 } 1837 1838 /* packet header may have moved, reset our local pointer */ 1839 wh = mtod(m0, struct ieee80211_frame *); 1840 } 1841 1842 /* 1843 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1844 * for directed frames only when the length of the MPDU is greater 1845 * than the length threshold indicated by [...]" ic_rtsthreshold. 1846 */ 1847 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1848 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1849 struct mbuf *m; 1850 uint16_t dur; 1851 int rtsrate, ackrate; 1852 1853 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1854 ackrate = rt2560_ack_rate(ic, rate); 1855 1856 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1857 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1858 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1859 3 * RAL_SIFS; 1860 1861 m = rt2560_get_rts(sc, wh, dur); 1862 1863 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1864 data = &sc->txq.data[sc->txq.cur_encrypt]; 1865 1866 error = bus_dmamap_load_mbuf(sc->txq.data_dmat, data->map, 1867 m, rt2560_dma_map_mbuf, &paddr, 0); 1868 if (error != 0) { 1869 device_printf(sc->sc_dev, 1870 "could not map mbuf (error %d)\n", error); 1871 m_freem(m); 1872 m_freem(m0); 1873 return error; 1874 } 1875 1876 /* avoid multiple free() of the same node for each fragment */ 1877 ieee80211_ref_node(ni); 1878 1879 data->m = m; 1880 data->ni = ni; 1881 1882 /* RTS frames are not taken into account for rssadapt */ 1883 data->id.id_node = NULL; 1884 1885 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1886 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, paddr); 1887 1888 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1889 BUS_DMASYNC_PREWRITE); 1890 1891 sc->txq.queued++; 1892 sc->txq.cur_encrypt = 1893 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1894 1895 /* 1896 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1897 * asynchronous data frame shall be transmitted after the CTS 1898 * frame and a SIFS period. 1899 */ 1900 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1901 } 1902 1903 data = &sc->txq.data[sc->txq.cur_encrypt]; 1904 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1905 1906 error = bus_dmamap_load_mbuf(sc->txq.data_dmat, data->map, m0, 1907 rt2560_dma_map_mbuf, &paddr, 0); 1908 if (error != 0 && error != EFBIG) { 1909 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1910 error); 1911 m_freem(m0); 1912 return error; 1913 } 1914 if (error != 0) { 1915 mnew = m_defrag(m0, MB_DONTWAIT); 1916 if (mnew == NULL) { 1917 device_printf(sc->sc_dev, 1918 "could not defragment mbuf\n"); 1919 m_freem(m0); 1920 return ENOBUFS; 1921 } 1922 m0 = mnew; 1923 1924 error = bus_dmamap_load_mbuf(sc->txq.data_dmat, data->map, 1925 m0, rt2560_dma_map_mbuf, &paddr, 1926 0); 1927 if (error != 0) { 1928 device_printf(sc->sc_dev, 1929 "could not map mbuf (error %d)\n", error); 1930 m_freem(m0); 1931 return error; 1932 } 1933 1934 /* packet header may have moved, reset our local pointer */ 1935 wh = mtod(m0, struct ieee80211_frame *); 1936 } 1937 1938 if (sc->sc_drvbpf != NULL) { 1939 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1940 1941 tap->wt_flags = 0; 1942 tap->wt_rate = rate; 1943 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1944 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1945 tap->wt_antenna = sc->tx_ant; 1946 1947 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len); 1948 } 1949 1950 data->m = m0; 1951 data->ni = ni; 1952 1953 /* remember link conditions for rate adaptation algorithm */ 1954 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1955 data->id.id_len = m0->m_pkthdr.len; 1956 data->id.id_rateidx = ni->ni_txrate; 1957 data->id.id_node = ni; 1958 data->id.id_rssi = ni->ni_rssi; 1959 } else 1960 data->id.id_node = NULL; 1961 1962 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1963 flags |= RT2560_TX_ACK; 1964 1965 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1966 ic->ic_flags) + RAL_SIFS; 1967 *(uint16_t *)wh->i_dur = htole16(dur); 1968 } 1969 1970 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, paddr); 1971 1972 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1973 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1974 BUS_DMASYNC_PREWRITE); 1975 1976 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1977 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1978 1979 /* kick encrypt */ 1980 sc->txq.queued++; 1981 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1982 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 1983 1984 return 0; 1985 } 1986 1987 static void 1988 rt2560_start(struct ifnet *ifp) 1989 { 1990 struct rt2560_softc *sc = ifp->if_softc; 1991 struct ieee80211com *ic = &sc->sc_ic; 1992 struct mbuf *m0; 1993 struct ether_header *eh; 1994 struct ieee80211_node *ni; 1995 1996 /* prevent management frames from being sent if we're not ready */ 1997 if (!(ifp->if_flags & IFF_RUNNING)) 1998 return; 1999 2000 for (;;) { 2001 IF_POLL(&ic->ic_mgtq, m0); 2002 if (m0 != NULL) { 2003 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2004 ifp->if_flags |= IFF_OACTIVE; 2005 break; 2006 } 2007 IF_DEQUEUE(&ic->ic_mgtq, m0); 2008 2009 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 2010 m0->m_pkthdr.rcvif = NULL; 2011 2012 if (ic->ic_rawbpf != NULL) 2013 bpf_mtap(ic->ic_rawbpf, m0); 2014 2015 if (rt2560_tx_mgt(sc, m0, ni) != 0) 2016 break; 2017 2018 } else { 2019 if (ic->ic_state != IEEE80211_S_RUN) 2020 break; 2021 m0 = ifq_poll(&ifp->if_snd); 2022 if (m0 == NULL) 2023 break; 2024 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 2025 ifp->if_flags |= IFF_OACTIVE; 2026 break; 2027 } 2028 m0 = ifq_dequeue(&ifp->if_snd, m0); 2029 2030 if (m0->m_len < sizeof (struct ether_header) && 2031 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 2032 continue; 2033 2034 eh = mtod(m0, struct ether_header *); 2035 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2036 if (ni == NULL) { 2037 m_freem(m0); 2038 continue; 2039 } 2040 BPF_MTAP(ifp, m0); 2041 2042 m0 = ieee80211_encap(ic, m0, ni); 2043 if (m0 == NULL) { 2044 ieee80211_free_node(ni); 2045 continue; 2046 } 2047 2048 if (ic->ic_rawbpf != NULL) 2049 bpf_mtap(ic->ic_rawbpf, m0); 2050 2051 if (rt2560_tx_data(sc, m0, ni) != 0) { 2052 ieee80211_free_node(ni); 2053 ifp->if_oerrors++; 2054 break; 2055 } 2056 } 2057 2058 sc->sc_tx_timer = 5; 2059 ifp->if_timer = 1; 2060 } 2061 } 2062 2063 static void 2064 rt2560_watchdog(struct ifnet *ifp) 2065 { 2066 struct rt2560_softc *sc = ifp->if_softc; 2067 struct ieee80211com *ic = &sc->sc_ic; 2068 2069 ifp->if_timer = 0; 2070 2071 if (sc->sc_tx_timer > 0) { 2072 if (--sc->sc_tx_timer == 0) { 2073 device_printf(sc->sc_dev, "device timeout\n"); 2074 rt2560_init(sc); 2075 ifp->if_oerrors++; 2076 return; 2077 } 2078 ifp->if_timer = 1; 2079 } 2080 2081 ieee80211_watchdog(ic); 2082 } 2083 2084 /* 2085 * This function allows for fast channel switching in monitor mode (used by 2086 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2087 * generate a new beacon frame. 2088 */ 2089 static int 2090 rt2560_reset(struct ifnet *ifp) 2091 { 2092 struct rt2560_softc *sc = ifp->if_softc; 2093 struct ieee80211com *ic = &sc->sc_ic; 2094 2095 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2096 return ENETRESET; 2097 2098 rt2560_set_chan(sc, ic->ic_curchan); 2099 2100 return 0; 2101 } 2102 2103 static int 2104 rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 2105 { 2106 struct rt2560_softc *sc = ifp->if_softc; 2107 struct ieee80211com *ic = &sc->sc_ic; 2108 int error = 0; 2109 2110 switch (cmd) { 2111 case SIOCSIFFLAGS: 2112 if (ifp->if_flags & IFF_UP) { 2113 if (ifp->if_flags & IFF_RUNNING) 2114 rt2560_update_promisc(sc); 2115 else 2116 rt2560_init(sc); 2117 } else { 2118 if (ifp->if_flags & IFF_RUNNING) 2119 rt2560_stop(sc); 2120 } 2121 break; 2122 2123 default: 2124 error = ieee80211_ioctl(ic, cmd, data, cr); 2125 } 2126 2127 if (error == ENETRESET) { 2128 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == 2129 (IFF_UP | IFF_RUNNING) && 2130 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2131 rt2560_init(sc); 2132 error = 0; 2133 } 2134 2135 return error; 2136 } 2137 2138 static void 2139 rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2140 { 2141 uint32_t tmp; 2142 int ntries; 2143 2144 for (ntries = 0; ntries < 100; ntries++) { 2145 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2146 break; 2147 DELAY(1); 2148 } 2149 if (ntries == 100) { 2150 device_printf(sc->sc_dev, "could not write to BBP\n"); 2151 return; 2152 } 2153 2154 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2155 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2156 2157 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2158 } 2159 2160 static uint8_t 2161 rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2162 { 2163 uint32_t val; 2164 int ntries; 2165 2166 val = RT2560_BBP_BUSY | reg << 8; 2167 RAL_WRITE(sc, RT2560_BBPCSR, val); 2168 2169 for (ntries = 0; ntries < 100; ntries++) { 2170 val = RAL_READ(sc, RT2560_BBPCSR); 2171 if (!(val & RT2560_BBP_BUSY)) 2172 return val & 0xff; 2173 DELAY(1); 2174 } 2175 2176 device_printf(sc->sc_dev, "could not read from BBP\n"); 2177 return 0; 2178 } 2179 2180 static void 2181 rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2182 { 2183 uint32_t tmp; 2184 int ntries; 2185 2186 for (ntries = 0; ntries < 100; ntries++) { 2187 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2188 break; 2189 DELAY(1); 2190 } 2191 if (ntries == 100) { 2192 device_printf(sc->sc_dev, "could not write to RF\n"); 2193 return; 2194 } 2195 2196 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2197 (reg & 0x3); 2198 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2199 2200 /* remember last written value in sc */ 2201 sc->rf_regs[reg] = val; 2202 2203 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2204 } 2205 2206 static void 2207 rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2208 { 2209 struct ieee80211com *ic = &sc->sc_ic; 2210 uint8_t power, tmp; 2211 u_int i, chan; 2212 2213 chan = ieee80211_chan2ieee(ic, c); 2214 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2215 return; 2216 2217 if (IEEE80211_IS_CHAN_2GHZ(c)) 2218 power = min(sc->txpow[chan - 1], 31); 2219 else 2220 power = 31; 2221 2222 /* adjust txpower using ifconfig settings */ 2223 power -= (100 - ic->ic_txpowlimit) / 8; 2224 2225 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2226 2227 switch (sc->rf_rev) { 2228 case RT2560_RF_2522: 2229 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2230 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2231 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2232 break; 2233 2234 case RT2560_RF_2523: 2235 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2236 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2237 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2238 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2239 break; 2240 2241 case RT2560_RF_2524: 2242 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2243 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2244 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2245 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2246 break; 2247 2248 case RT2560_RF_2525: 2249 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2250 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2251 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2252 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2253 2254 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2255 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2256 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2257 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2258 break; 2259 2260 case RT2560_RF_2525E: 2261 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2262 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2263 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2264 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2265 break; 2266 2267 case RT2560_RF_2526: 2268 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2269 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2270 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2271 2272 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2273 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2274 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2275 break; 2276 2277 /* dual-band RF */ 2278 case RT2560_RF_5222: 2279 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2280 2281 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2282 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2283 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2284 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2285 break; 2286 } 2287 2288 if (ic->ic_state != IEEE80211_S_SCAN) { 2289 /* set Japan filter bit for channel 14 */ 2290 tmp = rt2560_bbp_read(sc, 70); 2291 2292 tmp &= ~RT2560_JAPAN_FILTER; 2293 if (chan == 14) 2294 tmp |= RT2560_JAPAN_FILTER; 2295 2296 rt2560_bbp_write(sc, 70, tmp); 2297 2298 /* clear CRC errors */ 2299 RAL_READ(sc, RT2560_CNT0); 2300 } 2301 } 2302 2303 #if 0 2304 /* 2305 * Disable RF auto-tuning. 2306 */ 2307 static void 2308 rt2560_disable_rf_tune(struct rt2560_softc *sc) 2309 { 2310 uint32_t tmp; 2311 2312 if (sc->rf_rev != RT2560_RF_2523) { 2313 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2314 rt2560_rf_write(sc, RAL_RF1, tmp); 2315 } 2316 2317 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2318 rt2560_rf_write(sc, RAL_RF3, tmp); 2319 2320 DPRINTFN(2, ("disabling RF autotune\n")); 2321 } 2322 #endif 2323 2324 /* 2325 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2326 * synchronization. 2327 */ 2328 static void 2329 rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2330 { 2331 struct ieee80211com *ic = &sc->sc_ic; 2332 uint16_t logcwmin, preload; 2333 uint32_t tmp; 2334 2335 /* first, disable TSF synchronization */ 2336 RAL_WRITE(sc, RT2560_CSR14, 0); 2337 2338 tmp = 16 * ic->ic_bss->ni_intval; 2339 RAL_WRITE(sc, RT2560_CSR12, tmp); 2340 2341 RAL_WRITE(sc, RT2560_CSR13, 0); 2342 2343 logcwmin = 5; 2344 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2345 tmp = logcwmin << 16 | preload; 2346 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2347 2348 /* finally, enable TSF synchronization */ 2349 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2350 if (ic->ic_opmode == IEEE80211_M_STA) 2351 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2352 else 2353 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2354 RT2560_ENABLE_BEACON_GENERATOR; 2355 RAL_WRITE(sc, RT2560_CSR14, tmp); 2356 2357 DPRINTF(("enabling TSF synchronization\n")); 2358 } 2359 2360 static void 2361 rt2560_update_plcp(struct rt2560_softc *sc) 2362 { 2363 struct ieee80211com *ic = &sc->sc_ic; 2364 2365 /* no short preamble for 1Mbps */ 2366 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2367 2368 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2369 /* values taken from the reference driver */ 2370 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2371 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2372 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2373 } else { 2374 /* same values as above or'ed 0x8 */ 2375 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2376 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2377 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2378 } 2379 2380 DPRINTF(("updating PLCP for %s preamble\n", 2381 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2382 } 2383 2384 /* 2385 * This function can be called by ieee80211_set_shortslottime(). Refer to 2386 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2387 */ 2388 static void 2389 rt2560_update_slot(struct ifnet *ifp) 2390 { 2391 struct rt2560_softc *sc = ifp->if_softc; 2392 struct ieee80211com *ic = &sc->sc_ic; 2393 uint8_t slottime; 2394 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2395 uint32_t tmp; 2396 2397 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2398 2399 /* update the MAC slot boundaries */ 2400 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2401 tx_pifs = tx_sifs + slottime; 2402 tx_difs = tx_sifs + 2 * slottime; 2403 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2404 2405 tmp = RAL_READ(sc, RT2560_CSR11); 2406 tmp = (tmp & ~0x1f00) | slottime << 8; 2407 RAL_WRITE(sc, RT2560_CSR11, tmp); 2408 2409 tmp = tx_pifs << 16 | tx_sifs; 2410 RAL_WRITE(sc, RT2560_CSR18, tmp); 2411 2412 tmp = eifs << 16 | tx_difs; 2413 RAL_WRITE(sc, RT2560_CSR19, tmp); 2414 2415 DPRINTF(("setting slottime to %uus\n", slottime)); 2416 } 2417 2418 static void 2419 rt2560_set_basicrates(struct rt2560_softc *sc) 2420 { 2421 struct ieee80211com *ic = &sc->sc_ic; 2422 2423 /* update basic rate set */ 2424 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2425 /* 11b basic rates: 1, 2Mbps */ 2426 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2427 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2428 /* 11a basic rates: 6, 12, 24Mbps */ 2429 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2430 } else { 2431 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2432 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2433 } 2434 } 2435 2436 static void 2437 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2438 { 2439 uint32_t tmp; 2440 2441 /* set ON period to 70ms and OFF period to 30ms */ 2442 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2443 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2444 } 2445 2446 static void 2447 rt2560_set_bssid(struct rt2560_softc *sc, uint8_t *bssid) 2448 { 2449 uint32_t tmp; 2450 2451 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2452 RAL_WRITE(sc, RT2560_CSR5, tmp); 2453 2454 tmp = bssid[4] | bssid[5] << 8; 2455 RAL_WRITE(sc, RT2560_CSR6, tmp); 2456 2457 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2458 } 2459 2460 static void 2461 rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2462 { 2463 uint32_t tmp; 2464 2465 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2466 RAL_WRITE(sc, RT2560_CSR3, tmp); 2467 2468 tmp = addr[4] | addr[5] << 8; 2469 RAL_WRITE(sc, RT2560_CSR4, tmp); 2470 2471 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2472 } 2473 2474 static void 2475 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2476 { 2477 uint32_t tmp; 2478 2479 tmp = RAL_READ(sc, RT2560_CSR3); 2480 addr[0] = tmp & 0xff; 2481 addr[1] = (tmp >> 8) & 0xff; 2482 addr[2] = (tmp >> 16) & 0xff; 2483 addr[3] = (tmp >> 24); 2484 2485 tmp = RAL_READ(sc, RT2560_CSR4); 2486 addr[4] = tmp & 0xff; 2487 addr[5] = (tmp >> 8) & 0xff; 2488 } 2489 2490 static void 2491 rt2560_update_promisc(struct rt2560_softc *sc) 2492 { 2493 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2494 uint32_t tmp; 2495 2496 tmp = RAL_READ(sc, RT2560_RXCSR0); 2497 2498 tmp &= ~RT2560_DROP_NOT_TO_ME; 2499 if (!(ifp->if_flags & IFF_PROMISC)) 2500 tmp |= RT2560_DROP_NOT_TO_ME; 2501 2502 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2503 2504 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2505 "entering" : "leaving")); 2506 } 2507 2508 static const char * 2509 rt2560_get_rf(int rev) 2510 { 2511 switch (rev) { 2512 case RT2560_RF_2522: return "RT2522"; 2513 case RT2560_RF_2523: return "RT2523"; 2514 case RT2560_RF_2524: return "RT2524"; 2515 case RT2560_RF_2525: return "RT2525"; 2516 case RT2560_RF_2525E: return "RT2525e"; 2517 case RT2560_RF_2526: return "RT2526"; 2518 case RT2560_RF_5222: return "RT5222"; 2519 default: return "unknown"; 2520 } 2521 } 2522 2523 static void 2524 rt2560_read_eeprom(struct rt2560_softc *sc) 2525 { 2526 uint16_t val; 2527 int i; 2528 2529 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2530 sc->rf_rev = (val >> 11) & 0x7; 2531 sc->hw_radio = (val >> 10) & 0x1; 2532 sc->led_mode = (val >> 6) & 0x7; 2533 sc->rx_ant = (val >> 4) & 0x3; 2534 sc->tx_ant = (val >> 2) & 0x3; 2535 sc->nb_ant = val & 0x3; 2536 2537 /* read default values for BBP registers */ 2538 for (i = 0; i < 16; i++) { 2539 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2540 sc->bbp_prom[i].reg = val >> 8; 2541 sc->bbp_prom[i].val = val & 0xff; 2542 } 2543 2544 /* read Tx power for all b/g channels */ 2545 for (i = 0; i < 14 / 2; i++) { 2546 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2547 sc->txpow[i * 2] = val >> 8; 2548 sc->txpow[i * 2 + 1] = val & 0xff; 2549 } 2550 2551 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE); 2552 if ((val & 0xff00) == 0xff00) 2553 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR; 2554 else 2555 sc->rssi_corr = val >> 8; 2556 DPRINTF(("rssi correction %d, calibrate 0x%02x\n", 2557 sc->rssi_corr, val)); 2558 } 2559 2560 static int 2561 rt2560_bbp_init(struct rt2560_softc *sc) 2562 { 2563 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2564 int i, ntries; 2565 2566 /* wait for BBP to be ready */ 2567 for (ntries = 0; ntries < 100; ntries++) { 2568 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2569 break; 2570 DELAY(1); 2571 } 2572 if (ntries == 100) { 2573 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2574 return EIO; 2575 } 2576 2577 rt2560_set_txantenna(sc, sc->tx_ant); 2578 rt2560_set_rxantenna(sc, sc->rx_ant); 2579 2580 /* initialize BBP registers to default values */ 2581 for (i = 0; i < N(rt2560_def_bbp); i++) { 2582 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2583 rt2560_def_bbp[i].val); 2584 } 2585 #if 0 2586 /* initialize BBP registers to values stored in EEPROM */ 2587 for (i = 0; i < 16; i++) { 2588 if (sc->bbp_prom[i].reg == 0xff) 2589 continue; 2590 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2591 } 2592 #endif 2593 2594 return 0; 2595 #undef N 2596 } 2597 2598 static void 2599 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2600 { 2601 uint32_t tmp; 2602 uint8_t tx; 2603 2604 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2605 if (antenna == 1) 2606 tx |= RT2560_BBP_ANTA; 2607 else if (antenna == 2) 2608 tx |= RT2560_BBP_ANTB; 2609 else 2610 tx |= RT2560_BBP_DIVERSITY; 2611 2612 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2613 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2614 sc->rf_rev == RT2560_RF_5222) 2615 tx |= RT2560_BBP_FLIPIQ; 2616 2617 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2618 2619 /* update values for CCK and OFDM in BBPCSR1 */ 2620 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2621 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2622 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2623 } 2624 2625 static void 2626 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2627 { 2628 uint8_t rx; 2629 2630 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2631 if (antenna == 1) 2632 rx |= RT2560_BBP_ANTA; 2633 else if (antenna == 2) 2634 rx |= RT2560_BBP_ANTB; 2635 else 2636 rx |= RT2560_BBP_DIVERSITY; 2637 2638 /* need to force no I/Q flip for RF 2525e and 2526 */ 2639 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2640 rx &= ~RT2560_BBP_FLIPIQ; 2641 2642 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2643 } 2644 2645 static void 2646 rt2560_init(void *priv) 2647 { 2648 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2649 struct rt2560_softc *sc = priv; 2650 struct ieee80211com *ic = &sc->sc_ic; 2651 struct ifnet *ifp = ic->ic_ifp; 2652 uint32_t tmp; 2653 int i; 2654 2655 rt2560_stop(sc); 2656 2657 /* setup tx rings */ 2658 tmp = RT2560_PRIO_RING_COUNT << 24 | 2659 RT2560_ATIM_RING_COUNT << 16 | 2660 RT2560_TX_RING_COUNT << 8 | 2661 RT2560_TX_DESC_SIZE; 2662 2663 /* rings must be initialized in this exact order */ 2664 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2665 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2666 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2667 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2668 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2669 2670 /* setup rx ring */ 2671 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2672 2673 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2674 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2675 2676 /* initialize MAC registers to default values */ 2677 for (i = 0; i < N(rt2560_def_mac); i++) 2678 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2679 2680 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2681 rt2560_set_macaddr(sc, ic->ic_myaddr); 2682 2683 /* set basic rate set (will be updated later) */ 2684 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2685 2686 rt2560_update_slot(ifp); 2687 rt2560_update_plcp(sc); 2688 rt2560_update_led(sc, 0, 0); 2689 2690 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2691 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2692 2693 if (rt2560_bbp_init(sc) != 0) { 2694 rt2560_stop(sc); 2695 return; 2696 } 2697 2698 /* set default BSS channel */ 2699 rt2560_set_chan(sc, ic->ic_curchan); 2700 2701 /* kick Rx */ 2702 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2703 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2704 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2705 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2706 tmp |= RT2560_DROP_TODS; 2707 if (!(ifp->if_flags & IFF_PROMISC)) 2708 tmp |= RT2560_DROP_NOT_TO_ME; 2709 } 2710 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2711 2712 /* clear old FCS and Rx FIFO errors */ 2713 RAL_READ(sc, RT2560_CNT0); 2714 RAL_READ(sc, RT2560_CNT4); 2715 2716 /* clear any pending interrupts */ 2717 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2718 2719 /* enable interrupts */ 2720 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2721 2722 ifp->if_flags &= ~IFF_OACTIVE; 2723 ifp->if_flags |= IFF_RUNNING; 2724 2725 /* XXX */ 2726 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 2727 int i; 2728 2729 ic->ic_flags &= ~IEEE80211_F_DROPUNENC; 2730 for (i = 0; i < IEEE80211_WEP_NKID; ++i) { 2731 struct ieee80211_key *wk = &ic->ic_nw_keys[i]; 2732 2733 if (wk->wk_keylen == 0) 2734 continue; 2735 if (wk->wk_flags & IEEE80211_KEY_XMIT) 2736 wk->wk_flags |= IEEE80211_KEY_SWCRYPT; 2737 } 2738 } 2739 2740 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2741 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2742 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2743 } else 2744 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2745 #undef N 2746 } 2747 2748 void 2749 rt2560_stop(void *priv) 2750 { 2751 struct rt2560_softc *sc = priv; 2752 struct ieee80211com *ic = &sc->sc_ic; 2753 struct ifnet *ifp = ic->ic_ifp; 2754 2755 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2756 2757 sc->sc_tx_timer = 0; 2758 ifp->if_timer = 0; 2759 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2760 2761 /* abort Tx */ 2762 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2763 2764 /* disable Rx */ 2765 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2766 2767 /* reset ASIC (imply reset BBP) */ 2768 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2769 RAL_WRITE(sc, RT2560_CSR1, 0); 2770 2771 /* disable interrupts */ 2772 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2773 2774 /* reset Tx and Rx rings */ 2775 rt2560_reset_tx_ring(sc, &sc->txq); 2776 rt2560_reset_tx_ring(sc, &sc->atimq); 2777 rt2560_reset_tx_ring(sc, &sc->prioq); 2778 rt2560_reset_tx_ring(sc, &sc->bcnq); 2779 rt2560_reset_rx_ring(sc, &sc->rxq); 2780 } 2781 2782 static void 2783 rt2560_dma_map_mbuf(void *arg, bus_dma_segment_t *seg, int nseg, 2784 bus_size_t map_size __unused, int error) 2785 { 2786 if (error) 2787 return; 2788 2789 KASSERT(nseg == 1, ("too many dma segments\n")); 2790 *((bus_addr_t *)arg) = seg->ds_addr; 2791 } 2792