1 /* $FreeBSD$ */ 2 3 /*- 4 * Copyright (c) 2005, 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 RT2560 chipset driver 25 * http://www.ralinktech.com/ 26 */ 27 28 #include <sys/param.h> 29 #include <sys/sysctl.h> 30 #include <sys/sockio.h> 31 #include <sys/mbuf.h> 32 #include <sys/kernel.h> 33 #include <sys/socket.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/endian.h> 41 42 #include <machine/bus.h> 43 #include <machine/resource.h> 44 #include <sys/rman.h> 45 46 #include <net/bpf.h> 47 #include <net/if.h> 48 #include <net/if_arp.h> 49 #include <net/ethernet.h> 50 #include <net/if_dl.h> 51 #include <net/if_media.h> 52 #include <net/if_types.h> 53 54 #include <net80211/ieee80211_var.h> 55 #include <net80211/ieee80211_radiotap.h> 56 #include <net80211/ieee80211_regdomain.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/in_var.h> 61 #include <netinet/ip.h> 62 #include <netinet/if_ether.h> 63 64 #include <dev/ral/if_ralrate.h> 65 #include <dev/ral/rt2560reg.h> 66 #include <dev/ral/rt2560var.h> 67 68 #define RT2560_RSSI(sc, rssi) \ 69 ((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ? \ 70 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0) 71 72 #ifdef RAL_DEBUG 73 #define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 74 #define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 75 extern int ral_debug; 76 #else 77 #define DPRINTF(x) 78 #define DPRINTFN(n, x) 79 #endif 80 81 static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 82 int); 83 static int rt2560_alloc_tx_ring(struct rt2560_softc *, 84 struct rt2560_tx_ring *, int); 85 static void rt2560_reset_tx_ring(struct rt2560_softc *, 86 struct rt2560_tx_ring *); 87 static void rt2560_free_tx_ring(struct rt2560_softc *, 88 struct rt2560_tx_ring *); 89 static int rt2560_alloc_rx_ring(struct rt2560_softc *, 90 struct rt2560_rx_ring *, int); 91 static void rt2560_reset_rx_ring(struct rt2560_softc *, 92 struct rt2560_rx_ring *); 93 static void rt2560_free_rx_ring(struct rt2560_softc *, 94 struct rt2560_rx_ring *); 95 static struct ieee80211_node *rt2560_node_alloc( 96 struct ieee80211_node_table *); 97 static int rt2560_media_change(struct ifnet *); 98 static void rt2560_iter_func(void *, struct ieee80211_node *); 99 static void rt2560_update_rssadapt(void *); 100 static int rt2560_newstate(struct ieee80211com *, 101 enum ieee80211_state, int); 102 static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 103 static void rt2560_encryption_intr(struct rt2560_softc *); 104 static void rt2560_tx_intr(struct rt2560_softc *); 105 static void rt2560_prio_intr(struct rt2560_softc *); 106 static void rt2560_decryption_intr(struct rt2560_softc *); 107 static void rt2560_rx_intr(struct rt2560_softc *); 108 static void rt2560_beacon_expire(struct rt2560_softc *); 109 static void rt2560_wakeup_expire(struct rt2560_softc *); 110 static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 111 static int rt2560_ack_rate(struct ieee80211com *, int); 112 static void rt2560_scan_start(struct ieee80211com *); 113 static void rt2560_scan_end(struct ieee80211com *); 114 static void rt2560_set_channel(struct ieee80211com *); 115 static uint16_t rt2560_txtime(int, int, uint32_t); 116 static uint8_t rt2560_plcp_signal(int); 117 static void rt2560_setup_tx_desc(struct rt2560_softc *, 118 struct rt2560_tx_desc *, uint32_t, int, int, int, 119 bus_addr_t); 120 static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 121 struct ieee80211_node *); 122 static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 123 struct ieee80211_node *); 124 static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 125 struct ieee80211_frame *, uint16_t); 126 static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 127 struct ieee80211_node *); 128 static void rt2560_start(struct ifnet *); 129 static void rt2560_watchdog(void *); 130 static int rt2560_reset(struct ifnet *); 131 static int rt2560_ioctl(struct ifnet *, u_long, caddr_t); 132 static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 133 uint8_t); 134 static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 135 static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 136 uint32_t); 137 static void rt2560_set_chan(struct rt2560_softc *, 138 struct ieee80211_channel *); 139 #if 0 140 static void rt2560_disable_rf_tune(struct rt2560_softc *); 141 #endif 142 static void rt2560_enable_tsf_sync(struct rt2560_softc *); 143 static void rt2560_update_plcp(struct rt2560_softc *); 144 static void rt2560_update_slot(struct ifnet *); 145 static void rt2560_set_basicrates(struct rt2560_softc *); 146 static void rt2560_update_led(struct rt2560_softc *, int, int); 147 static void rt2560_set_bssid(struct rt2560_softc *, const uint8_t *); 148 static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 149 static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 150 static void rt2560_update_promisc(struct rt2560_softc *); 151 static const char *rt2560_get_rf(int); 152 static void rt2560_read_eeprom(struct rt2560_softc *); 153 static int rt2560_bbp_init(struct rt2560_softc *); 154 static void rt2560_set_txantenna(struct rt2560_softc *, int); 155 static void rt2560_set_rxantenna(struct rt2560_softc *, int); 156 static void rt2560_init(void *); 157 static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *, 158 const struct ieee80211_bpf_params *); 159 160 static const struct { 161 uint32_t reg; 162 uint32_t val; 163 } rt2560_def_mac[] = { 164 RT2560_DEF_MAC 165 }; 166 167 static const struct { 168 uint8_t reg; 169 uint8_t val; 170 } rt2560_def_bbp[] = { 171 RT2560_DEF_BBP 172 }; 173 174 static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 175 static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 176 static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 177 static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 178 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 179 static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 180 static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 181 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 182 183 static const struct { 184 uint8_t chan; 185 uint32_t r1, r2, r4; 186 } rt2560_rf5222[] = { 187 RT2560_RF5222 188 }; 189 190 int 191 rt2560_attach(device_t dev, int id) 192 { 193 struct rt2560_softc *sc = device_get_softc(dev); 194 struct ieee80211com *ic = &sc->sc_ic; 195 struct ifnet *ifp; 196 int error, bands; 197 198 sc->sc_dev = dev; 199 200 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 201 MTX_DEF | MTX_RECURSE); 202 203 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 204 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 205 206 /* retrieve RT2560 rev. no */ 207 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 208 209 /* retrieve MAC address */ 210 rt2560_get_macaddr(sc, ic->ic_myaddr); 211 212 /* retrieve RF rev. no and various other things from EEPROM */ 213 rt2560_read_eeprom(sc); 214 215 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 216 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 217 218 /* 219 * Allocate Tx and Rx rings. 220 */ 221 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 222 if (error != 0) { 223 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 224 goto fail1; 225 } 226 227 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 228 if (error != 0) { 229 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 230 goto fail2; 231 } 232 233 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 234 if (error != 0) { 235 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 236 goto fail3; 237 } 238 239 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 240 if (error != 0) { 241 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 242 goto fail4; 243 } 244 245 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 246 if (error != 0) { 247 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 248 goto fail5; 249 } 250 251 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 252 if (ifp == NULL) { 253 device_printf(sc->sc_dev, "can not if_alloc()\n"); 254 goto fail6; 255 } 256 257 ifp->if_softc = sc; 258 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 259 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 260 ifp->if_init = rt2560_init; 261 ifp->if_ioctl = rt2560_ioctl; 262 ifp->if_start = rt2560_start; 263 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 264 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 265 IFQ_SET_READY(&ifp->if_snd); 266 267 ic->ic_ifp = ifp; 268 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 269 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 270 ic->ic_state = IEEE80211_S_INIT; 271 272 /* set device capabilities */ 273 ic->ic_caps = 274 IEEE80211_C_IBSS | /* IBSS mode supported */ 275 IEEE80211_C_MONITOR | /* monitor mode supported */ 276 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 277 IEEE80211_C_TXPMGT | /* tx power management */ 278 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 279 IEEE80211_C_SHSLOT | /* short slot time supported */ 280 IEEE80211_C_BGSCAN | /* bg scanning support */ 281 IEEE80211_C_WPA; /* 802.11i */ 282 283 bands = 0; 284 setbit(&bands, IEEE80211_MODE_11B); 285 setbit(&bands, IEEE80211_MODE_11G); 286 if (sc->rf_rev == RT2560_RF_5222) 287 setbit(&bands, IEEE80211_MODE_11A); 288 ieee80211_init_channels(ic, 0, CTRY_DEFAULT, bands, 0, 1); 289 290 ieee80211_ifattach(ic); 291 ic->ic_scan_start = rt2560_scan_start; 292 ic->ic_scan_end = rt2560_scan_end; 293 ic->ic_set_channel = rt2560_set_channel; 294 ic->ic_node_alloc = rt2560_node_alloc; 295 ic->ic_updateslot = rt2560_update_slot; 296 ic->ic_reset = rt2560_reset; 297 /* enable s/w bmiss handling in sta mode */ 298 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 299 300 /* override state transition machine */ 301 sc->sc_newstate = ic->ic_newstate; 302 ic->ic_newstate = rt2560_newstate; 303 ic->ic_raw_xmit = rt2560_raw_xmit; 304 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 305 306 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 307 sizeof (struct ieee80211_frame) + sizeof (sc->sc_txtap), 308 &sc->sc_drvbpf); 309 310 sc->sc_rxtap_len = sizeof sc->sc_rxtap; 311 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 312 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 313 314 sc->sc_txtap_len = sizeof sc->sc_txtap; 315 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 316 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 317 318 /* 319 * Add a few sysctl knobs. 320 */ 321 sc->dwelltime = 200; 322 323 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 324 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 325 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 326 327 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 328 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 329 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 330 331 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 332 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 333 CTLFLAG_RW, &sc->dwelltime, 0, 334 "channel dwell time (ms) for AP/station scanning"); 335 336 if (bootverbose) 337 ieee80211_announce(ic); 338 339 return 0; 340 341 fail6: rt2560_free_rx_ring(sc, &sc->rxq); 342 fail5: rt2560_free_tx_ring(sc, &sc->bcnq); 343 fail4: rt2560_free_tx_ring(sc, &sc->prioq); 344 fail3: rt2560_free_tx_ring(sc, &sc->atimq); 345 fail2: rt2560_free_tx_ring(sc, &sc->txq); 346 fail1: mtx_destroy(&sc->sc_mtx); 347 348 return ENXIO; 349 } 350 351 int 352 rt2560_detach(void *xsc) 353 { 354 struct rt2560_softc *sc = xsc; 355 struct ieee80211com *ic = &sc->sc_ic; 356 struct ifnet *ifp = ic->ic_ifp; 357 358 rt2560_stop(sc); 359 callout_stop(&sc->watchdog_ch); 360 callout_stop(&sc->rssadapt_ch); 361 362 bpfdetach(ifp); 363 ieee80211_ifdetach(ic); 364 365 rt2560_free_tx_ring(sc, &sc->txq); 366 rt2560_free_tx_ring(sc, &sc->atimq); 367 rt2560_free_tx_ring(sc, &sc->prioq); 368 rt2560_free_tx_ring(sc, &sc->bcnq); 369 rt2560_free_rx_ring(sc, &sc->rxq); 370 371 if_free(ifp); 372 373 mtx_destroy(&sc->sc_mtx); 374 375 return 0; 376 } 377 378 void 379 rt2560_resume(void *xsc) 380 { 381 struct rt2560_softc *sc = xsc; 382 struct ifnet *ifp = sc->sc_ic.ic_ifp; 383 384 if (ifp->if_flags & IFF_UP) { 385 ifp->if_init(ifp->if_softc); 386 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 387 ifp->if_start(ifp); 388 } 389 } 390 391 static void 392 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 393 { 394 if (error != 0) 395 return; 396 397 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 398 399 *(bus_addr_t *)arg = segs[0].ds_addr; 400 } 401 402 static int 403 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 404 int count) 405 { 406 int i, error; 407 408 ring->count = count; 409 ring->queued = 0; 410 ring->cur = ring->next = 0; 411 ring->cur_encrypt = ring->next_encrypt = 0; 412 413 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 414 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_TX_DESC_SIZE, 1, 415 count * RT2560_TX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 416 if (error != 0) { 417 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 418 goto fail; 419 } 420 421 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 422 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 423 if (error != 0) { 424 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 425 goto fail; 426 } 427 428 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 429 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 430 0); 431 if (error != 0) { 432 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 433 goto fail; 434 } 435 436 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 437 M_NOWAIT | M_ZERO); 438 if (ring->data == NULL) { 439 device_printf(sc->sc_dev, "could not allocate soft data\n"); 440 error = ENOMEM; 441 goto fail; 442 } 443 444 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 445 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2560_MAX_SCATTER, 446 MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 447 if (error != 0) { 448 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 449 goto fail; 450 } 451 452 for (i = 0; i < count; i++) { 453 error = bus_dmamap_create(ring->data_dmat, 0, 454 &ring->data[i].map); 455 if (error != 0) { 456 device_printf(sc->sc_dev, "could not create DMA map\n"); 457 goto fail; 458 } 459 } 460 461 return 0; 462 463 fail: rt2560_free_tx_ring(sc, ring); 464 return error; 465 } 466 467 static void 468 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 469 { 470 struct rt2560_tx_desc *desc; 471 struct rt2560_tx_data *data; 472 int i; 473 474 for (i = 0; i < ring->count; i++) { 475 desc = &ring->desc[i]; 476 data = &ring->data[i]; 477 478 if (data->m != NULL) { 479 bus_dmamap_sync(ring->data_dmat, data->map, 480 BUS_DMASYNC_POSTWRITE); 481 bus_dmamap_unload(ring->data_dmat, data->map); 482 m_freem(data->m); 483 data->m = NULL; 484 } 485 486 if (data->ni != NULL) { 487 ieee80211_free_node(data->ni); 488 data->ni = NULL; 489 } 490 491 desc->flags = 0; 492 } 493 494 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 495 496 ring->queued = 0; 497 ring->cur = ring->next = 0; 498 ring->cur_encrypt = ring->next_encrypt = 0; 499 } 500 501 static void 502 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 503 { 504 struct rt2560_tx_data *data; 505 int i; 506 507 if (ring->desc != NULL) { 508 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 509 BUS_DMASYNC_POSTWRITE); 510 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 511 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 512 } 513 514 if (ring->desc_dmat != NULL) 515 bus_dma_tag_destroy(ring->desc_dmat); 516 517 if (ring->data != NULL) { 518 for (i = 0; i < ring->count; i++) { 519 data = &ring->data[i]; 520 521 if (data->m != NULL) { 522 bus_dmamap_sync(ring->data_dmat, data->map, 523 BUS_DMASYNC_POSTWRITE); 524 bus_dmamap_unload(ring->data_dmat, data->map); 525 m_freem(data->m); 526 } 527 528 if (data->ni != NULL) 529 ieee80211_free_node(data->ni); 530 531 if (data->map != NULL) 532 bus_dmamap_destroy(ring->data_dmat, data->map); 533 } 534 535 free(ring->data, M_DEVBUF); 536 } 537 538 if (ring->data_dmat != NULL) 539 bus_dma_tag_destroy(ring->data_dmat); 540 } 541 542 static int 543 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 544 int count) 545 { 546 struct rt2560_rx_desc *desc; 547 struct rt2560_rx_data *data; 548 bus_addr_t physaddr; 549 int i, error; 550 551 ring->count = count; 552 ring->cur = ring->next = 0; 553 ring->cur_decrypt = 0; 554 555 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 556 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_RX_DESC_SIZE, 1, 557 count * RT2560_RX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 558 if (error != 0) { 559 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 560 goto fail; 561 } 562 563 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 564 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 565 if (error != 0) { 566 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 567 goto fail; 568 } 569 570 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 571 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 572 0); 573 if (error != 0) { 574 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 575 goto fail; 576 } 577 578 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 579 M_NOWAIT | M_ZERO); 580 if (ring->data == NULL) { 581 device_printf(sc->sc_dev, "could not allocate soft data\n"); 582 error = ENOMEM; 583 goto fail; 584 } 585 586 /* 587 * Pre-allocate Rx buffers and populate Rx ring. 588 */ 589 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 590 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, NULL, 591 NULL, &ring->data_dmat); 592 if (error != 0) { 593 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 594 goto fail; 595 } 596 597 for (i = 0; i < count; i++) { 598 desc = &sc->rxq.desc[i]; 599 data = &sc->rxq.data[i]; 600 601 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 602 if (error != 0) { 603 device_printf(sc->sc_dev, "could not create DMA map\n"); 604 goto fail; 605 } 606 607 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 608 if (data->m == NULL) { 609 device_printf(sc->sc_dev, 610 "could not allocate rx mbuf\n"); 611 error = ENOMEM; 612 goto fail; 613 } 614 615 error = bus_dmamap_load(ring->data_dmat, data->map, 616 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 617 &physaddr, 0); 618 if (error != 0) { 619 device_printf(sc->sc_dev, 620 "could not load rx buf DMA map"); 621 goto fail; 622 } 623 624 desc->flags = htole32(RT2560_RX_BUSY); 625 desc->physaddr = htole32(physaddr); 626 } 627 628 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 629 630 return 0; 631 632 fail: rt2560_free_rx_ring(sc, ring); 633 return error; 634 } 635 636 static void 637 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 638 { 639 int i; 640 641 for (i = 0; i < ring->count; i++) { 642 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 643 ring->data[i].drop = 0; 644 } 645 646 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 647 648 ring->cur = ring->next = 0; 649 ring->cur_decrypt = 0; 650 } 651 652 static void 653 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 654 { 655 struct rt2560_rx_data *data; 656 int i; 657 658 if (ring->desc != NULL) { 659 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 660 BUS_DMASYNC_POSTWRITE); 661 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 662 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 663 } 664 665 if (ring->desc_dmat != NULL) 666 bus_dma_tag_destroy(ring->desc_dmat); 667 668 if (ring->data != NULL) { 669 for (i = 0; i < ring->count; i++) { 670 data = &ring->data[i]; 671 672 if (data->m != NULL) { 673 bus_dmamap_sync(ring->data_dmat, data->map, 674 BUS_DMASYNC_POSTREAD); 675 bus_dmamap_unload(ring->data_dmat, data->map); 676 m_freem(data->m); 677 } 678 679 if (data->map != NULL) 680 bus_dmamap_destroy(ring->data_dmat, data->map); 681 } 682 683 free(ring->data, M_DEVBUF); 684 } 685 686 if (ring->data_dmat != NULL) 687 bus_dma_tag_destroy(ring->data_dmat); 688 } 689 690 static struct ieee80211_node * 691 rt2560_node_alloc(struct ieee80211_node_table *nt) 692 { 693 struct rt2560_node *rn; 694 695 rn = malloc(sizeof (struct rt2560_node), M_80211_NODE, 696 M_NOWAIT | M_ZERO); 697 698 return (rn != NULL) ? &rn->ni : NULL; 699 } 700 701 static int 702 rt2560_media_change(struct ifnet *ifp) 703 { 704 struct rt2560_softc *sc = ifp->if_softc; 705 int error; 706 707 error = ieee80211_media_change(ifp); 708 709 if (error == ENETRESET) { 710 if ((ifp->if_flags & IFF_UP) && 711 (ifp->if_drv_flags & IFF_DRV_RUNNING)) 712 rt2560_init(sc); 713 } 714 return error; 715 } 716 717 /* 718 * This function is called for each node present in the node station table. 719 */ 720 static void 721 rt2560_iter_func(void *arg, struct ieee80211_node *ni) 722 { 723 struct rt2560_node *rn = (struct rt2560_node *)ni; 724 725 ral_rssadapt_updatestats(&rn->rssadapt); 726 } 727 728 /* 729 * This function is called periodically (every 100ms) in RUN state to update 730 * the rate adaptation statistics. 731 */ 732 static void 733 rt2560_update_rssadapt(void *arg) 734 { 735 struct rt2560_softc *sc = arg; 736 struct ieee80211com *ic = &sc->sc_ic; 737 738 RAL_LOCK(sc); 739 740 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 741 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 742 743 RAL_UNLOCK(sc); 744 } 745 746 static int 747 rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 748 { 749 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 750 enum ieee80211_state ostate; 751 struct ieee80211_node *ni; 752 struct mbuf *m; 753 int error = 0; 754 755 ostate = ic->ic_state; 756 757 switch (nstate) { 758 case IEEE80211_S_INIT: 759 callout_stop(&sc->rssadapt_ch); 760 761 if (ostate == IEEE80211_S_RUN) { 762 /* abort TSF synchronization */ 763 RAL_WRITE(sc, RT2560_CSR14, 0); 764 765 /* turn association led off */ 766 rt2560_update_led(sc, 0, 0); 767 } 768 break; 769 case IEEE80211_S_RUN: 770 ni = ic->ic_bss; 771 772 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 773 rt2560_update_plcp(sc); 774 rt2560_set_basicrates(sc); 775 rt2560_set_bssid(sc, ni->ni_bssid); 776 } 777 778 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 779 ic->ic_opmode == IEEE80211_M_IBSS) { 780 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 781 if (m == NULL) { 782 device_printf(sc->sc_dev, 783 "could not allocate beacon\n"); 784 error = ENOBUFS; 785 break; 786 } 787 788 ieee80211_ref_node(ni); 789 error = rt2560_tx_bcn(sc, m, ni); 790 if (error != 0) 791 break; 792 } 793 794 /* turn assocation led on */ 795 rt2560_update_led(sc, 1, 0); 796 797 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 798 callout_reset(&sc->rssadapt_ch, hz / 10, 799 rt2560_update_rssadapt, sc); 800 801 rt2560_enable_tsf_sync(sc); 802 } 803 break; 804 case IEEE80211_S_SCAN: 805 case IEEE80211_S_AUTH: 806 case IEEE80211_S_ASSOC: 807 break; 808 } 809 810 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 811 } 812 813 /* 814 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 815 * 93C66). 816 */ 817 static uint16_t 818 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 819 { 820 uint32_t tmp; 821 uint16_t val; 822 int n; 823 824 /* clock C once before the first command */ 825 RT2560_EEPROM_CTL(sc, 0); 826 827 RT2560_EEPROM_CTL(sc, RT2560_S); 828 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 829 RT2560_EEPROM_CTL(sc, RT2560_S); 830 831 /* write start bit (1) */ 832 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 833 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 834 835 /* write READ opcode (10) */ 836 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 837 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 838 RT2560_EEPROM_CTL(sc, RT2560_S); 839 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 840 841 /* write address (A5-A0 or A7-A0) */ 842 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 843 for (; n >= 0; n--) { 844 RT2560_EEPROM_CTL(sc, RT2560_S | 845 (((addr >> n) & 1) << RT2560_SHIFT_D)); 846 RT2560_EEPROM_CTL(sc, RT2560_S | 847 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 848 } 849 850 RT2560_EEPROM_CTL(sc, RT2560_S); 851 852 /* read data Q15-Q0 */ 853 val = 0; 854 for (n = 15; n >= 0; n--) { 855 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 856 tmp = RAL_READ(sc, RT2560_CSR21); 857 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 858 RT2560_EEPROM_CTL(sc, RT2560_S); 859 } 860 861 RT2560_EEPROM_CTL(sc, 0); 862 863 /* clear Chip Select and clock C */ 864 RT2560_EEPROM_CTL(sc, RT2560_S); 865 RT2560_EEPROM_CTL(sc, 0); 866 RT2560_EEPROM_CTL(sc, RT2560_C); 867 868 return val; 869 } 870 871 /* 872 * Some frames were processed by the hardware cipher engine and are ready for 873 * transmission. 874 */ 875 static void 876 rt2560_encryption_intr(struct rt2560_softc *sc) 877 { 878 struct rt2560_tx_desc *desc; 879 int hw; 880 881 /* retrieve last descriptor index processed by cipher engine */ 882 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 883 hw /= RT2560_TX_DESC_SIZE; 884 885 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 886 BUS_DMASYNC_POSTREAD); 887 888 for (; sc->txq.next_encrypt != hw;) { 889 desc = &sc->txq.desc[sc->txq.next_encrypt]; 890 891 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 892 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 893 break; 894 895 /* for TKIP, swap eiv field to fix a bug in ASIC */ 896 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 897 RT2560_TX_CIPHER_TKIP) 898 desc->eiv = bswap32(desc->eiv); 899 900 /* mark the frame ready for transmission */ 901 desc->flags |= htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 902 903 DPRINTFN(15, ("encryption done idx=%u\n", 904 sc->txq.next_encrypt)); 905 906 sc->txq.next_encrypt = 907 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 908 } 909 910 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 911 BUS_DMASYNC_PREWRITE); 912 913 /* kick Tx */ 914 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 915 } 916 917 static void 918 rt2560_tx_intr(struct rt2560_softc *sc) 919 { 920 struct ieee80211com *ic = &sc->sc_ic; 921 struct ifnet *ifp = ic->ic_ifp; 922 struct rt2560_tx_desc *desc; 923 struct rt2560_tx_data *data; 924 struct rt2560_node *rn; 925 926 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 927 BUS_DMASYNC_POSTREAD); 928 929 for (;;) { 930 desc = &sc->txq.desc[sc->txq.next]; 931 data = &sc->txq.data[sc->txq.next]; 932 933 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 934 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 935 !(le32toh(desc->flags) & RT2560_TX_VALID)) 936 break; 937 938 rn = (struct rt2560_node *)data->ni; 939 940 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 941 case RT2560_TX_SUCCESS: 942 DPRINTFN(10, ("data frame sent successfully\n")); 943 if (data->id.id_node != NULL) { 944 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 945 &data->id); 946 } 947 ifp->if_opackets++; 948 break; 949 950 case RT2560_TX_SUCCESS_RETRY: 951 DPRINTFN(9, ("data frame sent after %u retries\n", 952 (le32toh(desc->flags) >> 5) & 0x7)); 953 ifp->if_opackets++; 954 break; 955 956 case RT2560_TX_FAIL_RETRY: 957 DPRINTFN(9, ("sending data frame failed (too much " 958 "retries)\n")); 959 if (data->id.id_node != NULL) { 960 ral_rssadapt_lower_rate(ic, data->ni, 961 &rn->rssadapt, &data->id); 962 } 963 ifp->if_oerrors++; 964 break; 965 966 case RT2560_TX_FAIL_INVALID: 967 case RT2560_TX_FAIL_OTHER: 968 default: 969 device_printf(sc->sc_dev, "sending data frame failed " 970 "0x%08x\n", le32toh(desc->flags)); 971 ifp->if_oerrors++; 972 } 973 974 bus_dmamap_sync(sc->txq.data_dmat, data->map, 975 BUS_DMASYNC_POSTWRITE); 976 bus_dmamap_unload(sc->txq.data_dmat, data->map); 977 m_freem(data->m); 978 data->m = NULL; 979 ieee80211_free_node(data->ni); 980 data->ni = NULL; 981 982 /* descriptor is no longer valid */ 983 desc->flags &= ~htole32(RT2560_TX_VALID); 984 985 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 986 987 sc->txq.queued--; 988 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 989 } 990 991 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 992 BUS_DMASYNC_PREWRITE); 993 994 sc->sc_tx_timer = 0; 995 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 996 rt2560_start(ifp); 997 } 998 999 static void 1000 rt2560_prio_intr(struct rt2560_softc *sc) 1001 { 1002 struct ieee80211com *ic = &sc->sc_ic; 1003 struct ifnet *ifp = ic->ic_ifp; 1004 struct rt2560_tx_desc *desc; 1005 struct rt2560_tx_data *data; 1006 struct ieee80211_node *ni; 1007 struct mbuf *m; 1008 int flags; 1009 1010 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1011 BUS_DMASYNC_POSTREAD); 1012 1013 for (;;) { 1014 desc = &sc->prioq.desc[sc->prioq.next]; 1015 data = &sc->prioq.data[sc->prioq.next]; 1016 1017 flags = le32toh(desc->flags); 1018 if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0) 1019 break; 1020 1021 switch (flags & RT2560_TX_RESULT_MASK) { 1022 case RT2560_TX_SUCCESS: 1023 DPRINTFN(10, ("mgt frame sent successfully\n")); 1024 break; 1025 1026 case RT2560_TX_SUCCESS_RETRY: 1027 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1028 (flags >> 5) & 0x7)); 1029 break; 1030 1031 case RT2560_TX_FAIL_RETRY: 1032 DPRINTFN(9, ("sending mgt frame failed (too much " 1033 "retries)\n")); 1034 break; 1035 1036 case RT2560_TX_FAIL_INVALID: 1037 case RT2560_TX_FAIL_OTHER: 1038 default: 1039 device_printf(sc->sc_dev, "sending mgt frame failed " 1040 "0x%08x\n", flags); 1041 break; 1042 } 1043 1044 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1045 BUS_DMASYNC_POSTWRITE); 1046 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1047 1048 m = data->m; 1049 data->m = NULL; 1050 ni = data->ni; 1051 data->ni = NULL; 1052 1053 /* descriptor is no longer valid */ 1054 desc->flags &= ~htole32(RT2560_TX_VALID); 1055 1056 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1057 1058 sc->prioq.queued--; 1059 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1060 1061 if (m->m_flags & M_TXCB) 1062 ieee80211_process_callback(ni, m, 1063 (flags & RT2560_TX_RESULT_MASK) &~ 1064 (RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY)); 1065 m_freem(m); 1066 ieee80211_free_node(ni); 1067 } 1068 1069 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1070 BUS_DMASYNC_PREWRITE); 1071 1072 sc->sc_tx_timer = 0; 1073 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1074 rt2560_start(ifp); 1075 } 1076 1077 /* 1078 * Some frames were processed by the hardware cipher engine and are ready for 1079 * transmission to the IEEE802.11 layer. 1080 */ 1081 static void 1082 rt2560_decryption_intr(struct rt2560_softc *sc) 1083 { 1084 struct ieee80211com *ic = &sc->sc_ic; 1085 struct ifnet *ifp = ic->ic_ifp; 1086 struct rt2560_rx_desc *desc; 1087 struct rt2560_rx_data *data; 1088 bus_addr_t physaddr; 1089 struct ieee80211_frame *wh; 1090 struct ieee80211_node *ni; 1091 struct rt2560_node *rn; 1092 struct mbuf *mnew, *m; 1093 int hw, error; 1094 1095 /* retrieve last decriptor index processed by cipher engine */ 1096 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1097 hw /= RT2560_RX_DESC_SIZE; 1098 1099 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1100 BUS_DMASYNC_POSTREAD); 1101 1102 for (; sc->rxq.cur_decrypt != hw;) { 1103 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1104 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1105 1106 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1107 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1108 break; 1109 1110 if (data->drop) { 1111 ifp->if_ierrors++; 1112 goto skip; 1113 } 1114 1115 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1116 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1117 ifp->if_ierrors++; 1118 goto skip; 1119 } 1120 1121 /* 1122 * Try to allocate a new mbuf for this ring element and load it 1123 * before processing the current mbuf. If the ring element 1124 * cannot be loaded, drop the received packet and reuse the old 1125 * mbuf. In the unlikely case that the old mbuf can't be 1126 * reloaded either, explicitly panic. 1127 */ 1128 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1129 if (mnew == NULL) { 1130 ifp->if_ierrors++; 1131 goto skip; 1132 } 1133 1134 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1135 BUS_DMASYNC_POSTREAD); 1136 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1137 1138 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1139 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1140 &physaddr, 0); 1141 if (error != 0) { 1142 m_freem(mnew); 1143 1144 /* try to reload the old mbuf */ 1145 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1146 mtod(data->m, void *), MCLBYTES, 1147 rt2560_dma_map_addr, &physaddr, 0); 1148 if (error != 0) { 1149 /* very unlikely that it will fail... */ 1150 panic("%s: could not load old rx mbuf", 1151 device_get_name(sc->sc_dev)); 1152 } 1153 ifp->if_ierrors++; 1154 goto skip; 1155 } 1156 1157 /* 1158 * New mbuf successfully loaded, update Rx ring and continue 1159 * processing. 1160 */ 1161 m = data->m; 1162 data->m = mnew; 1163 desc->physaddr = htole32(physaddr); 1164 1165 /* finalize mbuf */ 1166 m->m_pkthdr.rcvif = ifp; 1167 m->m_pkthdr.len = m->m_len = 1168 (le32toh(desc->flags) >> 16) & 0xfff; 1169 1170 if (bpf_peers_present(sc->sc_drvbpf)) { 1171 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1172 uint32_t tsf_lo, tsf_hi; 1173 1174 /* get timestamp (low and high 32 bits) */ 1175 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1176 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1177 1178 tap->wr_tsf = 1179 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1180 tap->wr_flags = 0; 1181 tap->wr_rate = rt2560_rxrate(desc); 1182 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1183 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1184 tap->wr_antenna = sc->rx_ant; 1185 tap->wr_antsignal = RT2560_RSSI(sc, desc->rssi); 1186 1187 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1188 } 1189 1190 sc->sc_flags |= RAL_INPUT_RUNNING; 1191 RAL_UNLOCK(sc); 1192 wh = mtod(m, struct ieee80211_frame *); 1193 ni = ieee80211_find_rxnode(ic, 1194 (struct ieee80211_frame_min *)wh); 1195 1196 /* send the frame to the 802.11 layer */ 1197 ieee80211_input(ic, m, ni, RT2560_RSSI(sc, desc->rssi), 1198 RT2560_NOISE_FLOOR, 0); 1199 1200 /* give rssi to the rate adatation algorithm */ 1201 rn = (struct rt2560_node *)ni; 1202 ral_rssadapt_input(ic, ni, &rn->rssadapt, 1203 RT2560_RSSI(sc, desc->rssi)); 1204 1205 /* node is no longer needed */ 1206 ieee80211_free_node(ni); 1207 1208 RAL_LOCK(sc); 1209 sc->sc_flags &= ~RAL_INPUT_RUNNING; 1210 skip: desc->flags = htole32(RT2560_RX_BUSY); 1211 1212 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1213 1214 sc->rxq.cur_decrypt = 1215 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT; 1216 } 1217 1218 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1219 BUS_DMASYNC_PREWRITE); 1220 } 1221 1222 /* 1223 * Some frames were received. Pass them to the hardware cipher engine before 1224 * sending them to the 802.11 layer. 1225 */ 1226 static void 1227 rt2560_rx_intr(struct rt2560_softc *sc) 1228 { 1229 struct rt2560_rx_desc *desc; 1230 struct rt2560_rx_data *data; 1231 1232 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1233 BUS_DMASYNC_POSTREAD); 1234 1235 for (;;) { 1236 desc = &sc->rxq.desc[sc->rxq.cur]; 1237 data = &sc->rxq.data[sc->rxq.cur]; 1238 1239 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1240 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1241 break; 1242 1243 data->drop = 0; 1244 1245 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1246 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1247 /* 1248 * This should not happen since we did not request 1249 * to receive those frames when we filled RXCSR0. 1250 */ 1251 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1252 le32toh(desc->flags))); 1253 data->drop = 1; 1254 } 1255 1256 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1257 DPRINTFN(5, ("bad length\n")); 1258 data->drop = 1; 1259 } 1260 1261 /* mark the frame for decryption */ 1262 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1263 1264 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1265 1266 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1267 } 1268 1269 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1270 BUS_DMASYNC_PREWRITE); 1271 1272 /* kick decrypt */ 1273 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1274 } 1275 1276 /* 1277 * This function is called periodically in IBSS mode when a new beacon must be 1278 * sent out. 1279 */ 1280 static void 1281 rt2560_beacon_expire(struct rt2560_softc *sc) 1282 { 1283 struct ieee80211com *ic = &sc->sc_ic; 1284 struct rt2560_tx_data *data; 1285 1286 if (ic->ic_opmode != IEEE80211_M_IBSS && 1287 ic->ic_opmode != IEEE80211_M_HOSTAP) 1288 return; 1289 1290 data = &sc->bcnq.data[sc->bcnq.next]; 1291 /* 1292 * Don't send beacon if bsschan isn't set 1293 */ 1294 if (data->ni == NULL) 1295 return; 1296 1297 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1298 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1299 1300 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1301 1302 if (bpf_peers_present(ic->ic_rawbpf)) 1303 bpf_mtap(ic->ic_rawbpf, data->m); 1304 1305 rt2560_tx_bcn(sc, data->m, data->ni); 1306 1307 DPRINTFN(15, ("beacon expired\n")); 1308 1309 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1310 } 1311 1312 /* ARGSUSED */ 1313 static void 1314 rt2560_wakeup_expire(struct rt2560_softc *sc) 1315 { 1316 DPRINTFN(2, ("wakeup expired\n")); 1317 } 1318 1319 void 1320 rt2560_intr(void *arg) 1321 { 1322 struct rt2560_softc *sc = arg; 1323 struct ifnet *ifp = sc->sc_ifp; 1324 uint32_t r; 1325 1326 RAL_LOCK(sc); 1327 1328 /* disable interrupts */ 1329 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1330 1331 /* don't re-enable interrupts if we're shutting down */ 1332 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1333 RAL_UNLOCK(sc); 1334 return; 1335 } 1336 1337 r = RAL_READ(sc, RT2560_CSR7); 1338 RAL_WRITE(sc, RT2560_CSR7, r); 1339 1340 if (r & RT2560_BEACON_EXPIRE) 1341 rt2560_beacon_expire(sc); 1342 1343 if (r & RT2560_WAKEUP_EXPIRE) 1344 rt2560_wakeup_expire(sc); 1345 1346 if (r & RT2560_ENCRYPTION_DONE) 1347 rt2560_encryption_intr(sc); 1348 1349 if (r & RT2560_TX_DONE) 1350 rt2560_tx_intr(sc); 1351 1352 if (r & RT2560_PRIO_DONE) 1353 rt2560_prio_intr(sc); 1354 1355 if (r & RT2560_DECRYPTION_DONE) 1356 rt2560_decryption_intr(sc); 1357 1358 if (r & RT2560_RX_DONE) 1359 rt2560_rx_intr(sc); 1360 1361 /* re-enable interrupts */ 1362 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1363 1364 RAL_UNLOCK(sc); 1365 } 1366 1367 /* quickly determine if a given rate is CCK or OFDM */ 1368 #define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1369 1370 #define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1371 #define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1372 1373 #define RAL_SIFS 10 /* us */ 1374 1375 #define RT2560_TXRX_TURNAROUND 10 /* us */ 1376 1377 /* 1378 * This function is only used by the Rx radiotap code. 1379 */ 1380 static uint8_t 1381 rt2560_rxrate(struct rt2560_rx_desc *desc) 1382 { 1383 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1384 /* reverse function of rt2560_plcp_signal */ 1385 switch (desc->rate) { 1386 case 0xb: return 12; 1387 case 0xf: return 18; 1388 case 0xa: return 24; 1389 case 0xe: return 36; 1390 case 0x9: return 48; 1391 case 0xd: return 72; 1392 case 0x8: return 96; 1393 case 0xc: return 108; 1394 } 1395 } else { 1396 if (desc->rate == 10) 1397 return 2; 1398 if (desc->rate == 20) 1399 return 4; 1400 if (desc->rate == 55) 1401 return 11; 1402 if (desc->rate == 110) 1403 return 22; 1404 } 1405 return 2; /* should not get there */ 1406 } 1407 1408 /* 1409 * Return the expected ack rate for a frame transmitted at rate `rate'. 1410 * XXX: this should depend on the destination node basic rate set. 1411 */ 1412 static int 1413 rt2560_ack_rate(struct ieee80211com *ic, int rate) 1414 { 1415 switch (rate) { 1416 /* CCK rates */ 1417 case 2: 1418 return 2; 1419 case 4: 1420 case 11: 1421 case 22: 1422 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1423 1424 /* OFDM rates */ 1425 case 12: 1426 case 18: 1427 return 12; 1428 case 24: 1429 case 36: 1430 return 24; 1431 case 48: 1432 case 72: 1433 case 96: 1434 case 108: 1435 return 48; 1436 } 1437 1438 /* default to 1Mbps */ 1439 return 2; 1440 } 1441 1442 /* 1443 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1444 * The function automatically determines the operating mode depending on the 1445 * given rate. `flags' indicates whether short preamble is in use or not. 1446 */ 1447 static uint16_t 1448 rt2560_txtime(int len, int rate, uint32_t flags) 1449 { 1450 uint16_t txtime; 1451 1452 if (RAL_RATE_IS_OFDM(rate)) { 1453 /* IEEE Std 802.11a-1999, pp. 37 */ 1454 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1455 txtime = 16 + 4 + 4 * txtime + 6; 1456 } else { 1457 /* IEEE Std 802.11b-1999, pp. 28 */ 1458 txtime = (16 * len + rate - 1) / rate; 1459 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1460 txtime += 72 + 24; 1461 else 1462 txtime += 144 + 48; 1463 } 1464 1465 return txtime; 1466 } 1467 1468 static uint8_t 1469 rt2560_plcp_signal(int rate) 1470 { 1471 switch (rate) { 1472 /* CCK rates (returned values are device-dependent) */ 1473 case 2: return 0x0; 1474 case 4: return 0x1; 1475 case 11: return 0x2; 1476 case 22: return 0x3; 1477 1478 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1479 case 12: return 0xb; 1480 case 18: return 0xf; 1481 case 24: return 0xa; 1482 case 36: return 0xe; 1483 case 48: return 0x9; 1484 case 72: return 0xd; 1485 case 96: return 0x8; 1486 case 108: return 0xc; 1487 1488 /* unsupported rates (should not get there) */ 1489 default: return 0xff; 1490 } 1491 } 1492 1493 static void 1494 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1495 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1496 { 1497 struct ieee80211com *ic = &sc->sc_ic; 1498 uint16_t plcp_length; 1499 int remainder; 1500 1501 desc->flags = htole32(flags); 1502 desc->flags |= htole32(len << 16); 1503 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) : 1504 htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 1505 1506 desc->physaddr = htole32(physaddr); 1507 desc->wme = htole16( 1508 RT2560_AIFSN(2) | 1509 RT2560_LOGCWMIN(3) | 1510 RT2560_LOGCWMAX(8)); 1511 1512 /* setup PLCP fields */ 1513 desc->plcp_signal = rt2560_plcp_signal(rate); 1514 desc->plcp_service = 4; 1515 1516 len += IEEE80211_CRC_LEN; 1517 if (RAL_RATE_IS_OFDM(rate)) { 1518 desc->flags |= htole32(RT2560_TX_OFDM); 1519 1520 plcp_length = len & 0xfff; 1521 desc->plcp_length_hi = plcp_length >> 6; 1522 desc->plcp_length_lo = plcp_length & 0x3f; 1523 } else { 1524 plcp_length = (16 * len + rate - 1) / rate; 1525 if (rate == 22) { 1526 remainder = (16 * len) % 22; 1527 if (remainder != 0 && remainder < 7) 1528 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1529 } 1530 desc->plcp_length_hi = plcp_length >> 8; 1531 desc->plcp_length_lo = plcp_length & 0xff; 1532 1533 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1534 desc->plcp_signal |= 0x08; 1535 } 1536 } 1537 1538 static int 1539 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1540 struct ieee80211_node *ni) 1541 { 1542 struct ieee80211com *ic = &sc->sc_ic; 1543 struct rt2560_tx_desc *desc; 1544 struct rt2560_tx_data *data; 1545 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1546 int nsegs, rate, error; 1547 1548 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1549 data = &sc->bcnq.data[sc->bcnq.cur]; 1550 1551 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1552 1553 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0, 1554 segs, &nsegs, BUS_DMA_NOWAIT); 1555 if (error != 0) { 1556 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1557 error); 1558 m_freem(m0); 1559 return error; 1560 } 1561 1562 if (bpf_peers_present(sc->sc_drvbpf)) { 1563 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1564 1565 tap->wt_flags = 0; 1566 tap->wt_rate = rate; 1567 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1568 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1569 tap->wt_antenna = sc->tx_ant; 1570 1571 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1572 } 1573 1574 data->m = m0; 1575 data->ni = ni; 1576 1577 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1578 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr); 1579 1580 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1581 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1582 1583 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1584 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1585 BUS_DMASYNC_PREWRITE); 1586 1587 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1588 1589 return 0; 1590 } 1591 1592 static int 1593 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1594 struct ieee80211_node *ni) 1595 { 1596 struct ieee80211com *ic = &sc->sc_ic; 1597 struct rt2560_tx_desc *desc; 1598 struct rt2560_tx_data *data; 1599 struct ieee80211_frame *wh; 1600 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1601 uint16_t dur; 1602 uint32_t flags = 0; 1603 int nsegs, rate, error; 1604 1605 desc = &sc->prioq.desc[sc->prioq.cur]; 1606 data = &sc->prioq.data[sc->prioq.cur]; 1607 1608 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1609 1610 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1611 segs, &nsegs, 0); 1612 if (error != 0) { 1613 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1614 error); 1615 m_freem(m0); 1616 return error; 1617 } 1618 1619 if (bpf_peers_present(sc->sc_drvbpf)) { 1620 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1621 1622 tap->wt_flags = 0; 1623 tap->wt_rate = rate; 1624 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1625 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1626 tap->wt_antenna = sc->tx_ant; 1627 1628 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1629 } 1630 1631 data->m = m0; 1632 data->ni = ni; 1633 1634 wh = mtod(m0, struct ieee80211_frame *); 1635 1636 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1637 flags |= RT2560_TX_ACK; 1638 1639 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1640 RAL_SIFS; 1641 *(uint16_t *)wh->i_dur = htole16(dur); 1642 1643 /* tell hardware to add timestamp for probe responses */ 1644 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1645 IEEE80211_FC0_TYPE_MGT && 1646 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1647 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1648 flags |= RT2560_TX_TIMESTAMP; 1649 } 1650 1651 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, 1652 segs->ds_addr); 1653 1654 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1655 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1656 BUS_DMASYNC_PREWRITE); 1657 1658 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1659 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1660 1661 /* kick prio */ 1662 sc->prioq.queued++; 1663 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1664 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1665 1666 return 0; 1667 } 1668 1669 static int 1670 rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0, 1671 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params) 1672 { 1673 struct ieee80211com *ic = &sc->sc_ic; 1674 struct rt2560_tx_desc *desc; 1675 struct rt2560_tx_data *data; 1676 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1677 uint32_t flags; 1678 int nsegs, rate, error; 1679 1680 desc = &sc->prioq.desc[sc->prioq.cur]; 1681 data = &sc->prioq.data[sc->prioq.cur]; 1682 1683 rate = params->ibp_rate0 & IEEE80211_RATE_VAL; 1684 /* XXX validate */ 1685 if (rate == 0) { 1686 m_freem(m0); 1687 return EINVAL; 1688 } 1689 1690 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1691 segs, &nsegs, 0); 1692 if (error != 0) { 1693 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1694 error); 1695 m_freem(m0); 1696 return error; 1697 } 1698 1699 if (bpf_peers_present(sc->sc_drvbpf)) { 1700 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1701 1702 tap->wt_flags = 0; 1703 tap->wt_rate = rate; 1704 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1705 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1706 tap->wt_antenna = sc->tx_ant; 1707 1708 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1709 } 1710 1711 data->m = m0; 1712 data->ni = ni; 1713 1714 flags = 0; 1715 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) 1716 flags |= RT2560_TX_ACK; 1717 1718 /* XXX need to setup descriptor ourself */ 1719 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, 1720 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0, 1721 segs->ds_addr); 1722 1723 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1724 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1725 BUS_DMASYNC_PREWRITE); 1726 1727 DPRINTFN(10, ("sending raw frame len=%u idx=%u rate=%u\n", 1728 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1729 1730 /* kick prio */ 1731 sc->prioq.queued++; 1732 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1733 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1734 1735 return 0; 1736 } 1737 1738 /* 1739 * Build a RTS control frame. 1740 */ 1741 static struct mbuf * 1742 rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1743 uint16_t dur) 1744 { 1745 struct ieee80211_frame_rts *rts; 1746 struct mbuf *m; 1747 1748 MGETHDR(m, M_DONTWAIT, MT_DATA); 1749 if (m == NULL) { 1750 sc->sc_ic.ic_stats.is_tx_nobuf++; 1751 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1752 return NULL; 1753 } 1754 1755 rts = mtod(m, struct ieee80211_frame_rts *); 1756 1757 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1758 IEEE80211_FC0_SUBTYPE_RTS; 1759 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1760 *(uint16_t *)rts->i_dur = htole16(dur); 1761 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1762 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1763 1764 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1765 1766 return m; 1767 } 1768 1769 static int 1770 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1771 struct ieee80211_node *ni) 1772 { 1773 struct ieee80211com *ic = &sc->sc_ic; 1774 struct rt2560_tx_desc *desc; 1775 struct rt2560_tx_data *data; 1776 struct rt2560_node *rn; 1777 struct ieee80211_frame *wh; 1778 struct ieee80211_key *k; 1779 struct mbuf *mnew; 1780 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1781 uint16_t dur; 1782 uint32_t flags = 0; 1783 int nsegs, rate, error; 1784 1785 wh = mtod(m0, struct ieee80211_frame *); 1786 1787 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1788 rate = ic->ic_fixed_rate; 1789 } else { 1790 struct ieee80211_rateset *rs; 1791 1792 rs = &ni->ni_rates; 1793 rn = (struct rt2560_node *)ni; 1794 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1795 m0->m_pkthdr.len, NULL, 0); 1796 rate = rs->rs_rates[ni->ni_txrate]; 1797 } 1798 rate &= IEEE80211_RATE_VAL; 1799 1800 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1801 k = ieee80211_crypto_encap(ic, ni, m0); 1802 if (k == NULL) { 1803 m_freem(m0); 1804 return ENOBUFS; 1805 } 1806 1807 /* packet header may have moved, reset our local pointer */ 1808 wh = mtod(m0, struct ieee80211_frame *); 1809 } 1810 1811 /* 1812 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1813 * for directed frames only when the length of the MPDU is greater 1814 * than the length threshold indicated by [...]" ic_rtsthreshold. 1815 */ 1816 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1817 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1818 struct mbuf *m; 1819 uint16_t dur; 1820 int rtsrate, ackrate; 1821 1822 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1823 ackrate = rt2560_ack_rate(ic, rate); 1824 1825 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1826 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1827 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1828 3 * RAL_SIFS; 1829 1830 m = rt2560_get_rts(sc, wh, dur); 1831 1832 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1833 data = &sc->txq.data[sc->txq.cur_encrypt]; 1834 1835 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1836 m, segs, &nsegs, 0); 1837 if (error != 0) { 1838 device_printf(sc->sc_dev, 1839 "could not map mbuf (error %d)\n", error); 1840 m_freem(m); 1841 m_freem(m0); 1842 return error; 1843 } 1844 1845 /* avoid multiple free() of the same node for each fragment */ 1846 ieee80211_ref_node(ni); 1847 1848 data->m = m; 1849 data->ni = ni; 1850 1851 /* RTS frames are not taken into account for rssadapt */ 1852 data->id.id_node = NULL; 1853 1854 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1855 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, 1856 segs->ds_addr); 1857 1858 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1859 BUS_DMASYNC_PREWRITE); 1860 1861 sc->txq.queued++; 1862 sc->txq.cur_encrypt = 1863 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1864 1865 /* 1866 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1867 * asynchronous data frame shall be transmitted after the CTS 1868 * frame and a SIFS period. 1869 */ 1870 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1871 } 1872 1873 data = &sc->txq.data[sc->txq.cur_encrypt]; 1874 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1875 1876 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0, 1877 segs, &nsegs, 0); 1878 if (error != 0 && error != EFBIG) { 1879 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1880 error); 1881 m_freem(m0); 1882 return error; 1883 } 1884 if (error != 0) { 1885 mnew = m_defrag(m0, M_DONTWAIT); 1886 if (mnew == NULL) { 1887 device_printf(sc->sc_dev, 1888 "could not defragment mbuf\n"); 1889 m_freem(m0); 1890 return ENOBUFS; 1891 } 1892 m0 = mnew; 1893 1894 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1895 m0, segs, &nsegs, 0); 1896 if (error != 0) { 1897 device_printf(sc->sc_dev, 1898 "could not map mbuf (error %d)\n", error); 1899 m_freem(m0); 1900 return error; 1901 } 1902 1903 /* packet header may have moved, reset our local pointer */ 1904 wh = mtod(m0, struct ieee80211_frame *); 1905 } 1906 1907 if (bpf_peers_present(sc->sc_drvbpf)) { 1908 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1909 1910 tap->wt_flags = 0; 1911 tap->wt_rate = rate; 1912 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1913 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1914 tap->wt_antenna = sc->tx_ant; 1915 1916 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1917 } 1918 1919 data->m = m0; 1920 data->ni = ni; 1921 1922 /* remember link conditions for rate adaptation algorithm */ 1923 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1924 data->id.id_len = m0->m_pkthdr.len; 1925 data->id.id_rateidx = ni->ni_txrate; 1926 data->id.id_node = ni; 1927 data->id.id_rssi = ni->ni_rssi; 1928 } else 1929 data->id.id_node = NULL; 1930 1931 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1932 flags |= RT2560_TX_ACK; 1933 1934 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1935 ic->ic_flags) + RAL_SIFS; 1936 *(uint16_t *)wh->i_dur = htole16(dur); 1937 } 1938 1939 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, 1940 segs->ds_addr); 1941 1942 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1943 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1944 BUS_DMASYNC_PREWRITE); 1945 1946 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1947 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1948 1949 /* kick encrypt */ 1950 sc->txq.queued++; 1951 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1952 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 1953 1954 return 0; 1955 } 1956 1957 static void 1958 rt2560_start(struct ifnet *ifp) 1959 { 1960 struct rt2560_softc *sc = ifp->if_softc; 1961 struct ieee80211com *ic = &sc->sc_ic; 1962 struct mbuf *m0; 1963 struct ether_header *eh; 1964 struct ieee80211_node *ni; 1965 1966 RAL_LOCK(sc); 1967 1968 /* prevent management frames from being sent if we're not ready */ 1969 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1970 RAL_UNLOCK(sc); 1971 return; 1972 } 1973 1974 for (;;) { 1975 IF_POLL(&ic->ic_mgtq, m0); 1976 if (m0 != NULL) { 1977 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 1978 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1979 break; 1980 } 1981 IF_DEQUEUE(&ic->ic_mgtq, m0); 1982 1983 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1984 m0->m_pkthdr.rcvif = NULL; 1985 1986 if (bpf_peers_present(ic->ic_rawbpf)) 1987 bpf_mtap(ic->ic_rawbpf, m0); 1988 1989 if (rt2560_tx_mgt(sc, m0, ni) != 0) { 1990 ieee80211_free_node(ni); 1991 break; 1992 } 1993 } else { 1994 if (ic->ic_state != IEEE80211_S_RUN) 1995 break; 1996 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 1997 if (m0 == NULL) 1998 break; 1999 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 2000 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 2001 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2002 break; 2003 } 2004 2005 if (m0->m_len < sizeof (struct ether_header) && 2006 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 2007 continue; 2008 2009 eh = mtod(m0, struct ether_header *); 2010 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2011 if (ni == NULL) { 2012 m_freem(m0); 2013 continue; 2014 } 2015 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 2016 (m0->m_flags & M_PWR_SAV) == 0) { 2017 /* 2018 * Station in power save mode; pass the frame 2019 * to the 802.11 layer and continue. We'll get 2020 * the frame back when the time is right. 2021 */ 2022 ieee80211_pwrsave(ni, m0); 2023 /* 2024 * If we're in power save mode 'cuz of a bg 2025 * scan cancel it so the traffic can flow. 2026 * The packet we just queued will automatically 2027 * get sent when we drop out of power save. 2028 * XXX locking 2029 */ 2030 if (ic->ic_flags & IEEE80211_F_SCAN) 2031 ieee80211_cancel_scan(ic); 2032 ieee80211_free_node(ni); 2033 continue; 2034 2035 } 2036 2037 BPF_MTAP(ifp, m0); 2038 2039 m0 = ieee80211_encap(ic, m0, ni); 2040 if (m0 == NULL) { 2041 ieee80211_free_node(ni); 2042 continue; 2043 } 2044 2045 if (bpf_peers_present(ic->ic_rawbpf)) 2046 bpf_mtap(ic->ic_rawbpf, m0); 2047 2048 if (rt2560_tx_data(sc, m0, ni) != 0) { 2049 ieee80211_free_node(ni); 2050 ifp->if_oerrors++; 2051 break; 2052 } 2053 } 2054 2055 sc->sc_tx_timer = 5; 2056 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2057 } 2058 2059 RAL_UNLOCK(sc); 2060 } 2061 2062 static void 2063 rt2560_watchdog(void *arg) 2064 { 2065 struct rt2560_softc *sc = arg; 2066 2067 if (sc->sc_tx_timer > 0) { 2068 if (--sc->sc_tx_timer == 0) { 2069 device_printf(sc->sc_dev, "device timeout\n"); 2070 rt2560_init(sc); 2071 sc->sc_ifp->if_oerrors++; 2072 return; 2073 } 2074 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2075 } 2076 } 2077 2078 /* 2079 * This function allows for fast channel switching in monitor mode (used by 2080 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2081 * generate a new beacon frame. 2082 */ 2083 static int 2084 rt2560_reset(struct ifnet *ifp) 2085 { 2086 struct rt2560_softc *sc = ifp->if_softc; 2087 struct ieee80211com *ic = &sc->sc_ic; 2088 2089 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2090 return ENETRESET; 2091 2092 rt2560_set_chan(sc, ic->ic_curchan); 2093 2094 return 0; 2095 } 2096 2097 static int 2098 rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2099 { 2100 struct rt2560_softc *sc = ifp->if_softc; 2101 struct ieee80211com *ic = &sc->sc_ic; 2102 int error = 0; 2103 2104 2105 2106 switch (cmd) { 2107 case SIOCSIFFLAGS: 2108 if (ifp->if_flags & IFF_UP) { 2109 RAL_LOCK(sc); 2110 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2111 rt2560_update_promisc(sc); 2112 else 2113 rt2560_init(sc); 2114 RAL_UNLOCK(sc); 2115 } else { 2116 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2117 rt2560_stop(sc); 2118 } 2119 2120 break; 2121 2122 default: 2123 error = ieee80211_ioctl(ic, cmd, data); 2124 } 2125 2126 if (error == ENETRESET) { 2127 if ((ifp->if_flags & IFF_UP) && 2128 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 2129 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2130 rt2560_init(sc); 2131 error = 0; 2132 } 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 default: 2287 printf("unknown ral rev=%d\n", sc->rf_rev); 2288 } 2289 2290 if (ic->ic_state != IEEE80211_S_SCAN) { 2291 /* set Japan filter bit for channel 14 */ 2292 tmp = rt2560_bbp_read(sc, 70); 2293 2294 tmp &= ~RT2560_JAPAN_FILTER; 2295 if (chan == 14) 2296 tmp |= RT2560_JAPAN_FILTER; 2297 2298 rt2560_bbp_write(sc, 70, tmp); 2299 2300 /* clear CRC errors */ 2301 RAL_READ(sc, RT2560_CNT0); 2302 } 2303 } 2304 2305 static void 2306 rt2560_set_channel(struct ieee80211com *ic) 2307 { 2308 struct ifnet *ifp = ic->ic_ifp; 2309 struct rt2560_softc *sc = ifp->if_softc; 2310 2311 RAL_LOCK(sc); 2312 rt2560_set_chan(sc, ic->ic_curchan); 2313 RAL_UNLOCK(sc); 2314 2315 } 2316 2317 #if 0 2318 /* 2319 * Disable RF auto-tuning. 2320 */ 2321 static void 2322 rt2560_disable_rf_tune(struct rt2560_softc *sc) 2323 { 2324 uint32_t tmp; 2325 2326 if (sc->rf_rev != RT2560_RF_2523) { 2327 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2328 rt2560_rf_write(sc, RAL_RF1, tmp); 2329 } 2330 2331 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2332 rt2560_rf_write(sc, RAL_RF3, tmp); 2333 2334 DPRINTFN(2, ("disabling RF autotune\n")); 2335 } 2336 #endif 2337 2338 /* 2339 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2340 * synchronization. 2341 */ 2342 static void 2343 rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2344 { 2345 struct ieee80211com *ic = &sc->sc_ic; 2346 uint16_t logcwmin, preload; 2347 uint32_t tmp; 2348 2349 /* first, disable TSF synchronization */ 2350 RAL_WRITE(sc, RT2560_CSR14, 0); 2351 2352 tmp = 16 * ic->ic_bss->ni_intval; 2353 RAL_WRITE(sc, RT2560_CSR12, tmp); 2354 2355 RAL_WRITE(sc, RT2560_CSR13, 0); 2356 2357 logcwmin = 5; 2358 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2359 tmp = logcwmin << 16 | preload; 2360 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2361 2362 /* finally, enable TSF synchronization */ 2363 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2364 if (ic->ic_opmode == IEEE80211_M_STA) 2365 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2366 else 2367 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2368 RT2560_ENABLE_BEACON_GENERATOR; 2369 RAL_WRITE(sc, RT2560_CSR14, tmp); 2370 2371 DPRINTF(("enabling TSF synchronization\n")); 2372 } 2373 2374 static void 2375 rt2560_update_plcp(struct rt2560_softc *sc) 2376 { 2377 struct ieee80211com *ic = &sc->sc_ic; 2378 2379 /* no short preamble for 1Mbps */ 2380 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2381 2382 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2383 /* values taken from the reference driver */ 2384 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2385 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2386 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2387 } else { 2388 /* same values as above or'ed 0x8 */ 2389 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2390 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2391 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2392 } 2393 2394 DPRINTF(("updating PLCP for %s preamble\n", 2395 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2396 } 2397 2398 /* 2399 * This function can be called by ieee80211_set_shortslottime(). Refer to 2400 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2401 */ 2402 static void 2403 rt2560_update_slot(struct ifnet *ifp) 2404 { 2405 struct rt2560_softc *sc = ifp->if_softc; 2406 struct ieee80211com *ic = &sc->sc_ic; 2407 uint8_t slottime; 2408 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2409 uint32_t tmp; 2410 2411 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2412 2413 /* update the MAC slot boundaries */ 2414 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2415 tx_pifs = tx_sifs + slottime; 2416 tx_difs = tx_sifs + 2 * slottime; 2417 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2418 2419 tmp = RAL_READ(sc, RT2560_CSR11); 2420 tmp = (tmp & ~0x1f00) | slottime << 8; 2421 RAL_WRITE(sc, RT2560_CSR11, tmp); 2422 2423 tmp = tx_pifs << 16 | tx_sifs; 2424 RAL_WRITE(sc, RT2560_CSR18, tmp); 2425 2426 tmp = eifs << 16 | tx_difs; 2427 RAL_WRITE(sc, RT2560_CSR19, tmp); 2428 2429 DPRINTF(("setting slottime to %uus\n", slottime)); 2430 } 2431 2432 static void 2433 rt2560_set_basicrates(struct rt2560_softc *sc) 2434 { 2435 struct ieee80211com *ic = &sc->sc_ic; 2436 2437 /* update basic rate set */ 2438 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2439 /* 11b basic rates: 1, 2Mbps */ 2440 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2441 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2442 /* 11a basic rates: 6, 12, 24Mbps */ 2443 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2444 } else { 2445 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2446 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2447 } 2448 } 2449 2450 static void 2451 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2452 { 2453 uint32_t tmp; 2454 2455 /* set ON period to 70ms and OFF period to 30ms */ 2456 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2457 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2458 } 2459 2460 static void 2461 rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid) 2462 { 2463 uint32_t tmp; 2464 2465 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2466 RAL_WRITE(sc, RT2560_CSR5, tmp); 2467 2468 tmp = bssid[4] | bssid[5] << 8; 2469 RAL_WRITE(sc, RT2560_CSR6, tmp); 2470 2471 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2472 } 2473 2474 static void 2475 rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2476 { 2477 uint32_t tmp; 2478 2479 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2480 RAL_WRITE(sc, RT2560_CSR3, tmp); 2481 2482 tmp = addr[4] | addr[5] << 8; 2483 RAL_WRITE(sc, RT2560_CSR4, tmp); 2484 2485 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2486 } 2487 2488 static void 2489 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2490 { 2491 uint32_t tmp; 2492 2493 tmp = RAL_READ(sc, RT2560_CSR3); 2494 addr[0] = tmp & 0xff; 2495 addr[1] = (tmp >> 8) & 0xff; 2496 addr[2] = (tmp >> 16) & 0xff; 2497 addr[3] = (tmp >> 24); 2498 2499 tmp = RAL_READ(sc, RT2560_CSR4); 2500 addr[4] = tmp & 0xff; 2501 addr[5] = (tmp >> 8) & 0xff; 2502 } 2503 2504 static void 2505 rt2560_update_promisc(struct rt2560_softc *sc) 2506 { 2507 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2508 uint32_t tmp; 2509 2510 tmp = RAL_READ(sc, RT2560_RXCSR0); 2511 2512 tmp &= ~RT2560_DROP_NOT_TO_ME; 2513 if (!(ifp->if_flags & IFF_PROMISC)) 2514 tmp |= RT2560_DROP_NOT_TO_ME; 2515 2516 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2517 2518 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2519 "entering" : "leaving")); 2520 } 2521 2522 static const char * 2523 rt2560_get_rf(int rev) 2524 { 2525 switch (rev) { 2526 case RT2560_RF_2522: return "RT2522"; 2527 case RT2560_RF_2523: return "RT2523"; 2528 case RT2560_RF_2524: return "RT2524"; 2529 case RT2560_RF_2525: return "RT2525"; 2530 case RT2560_RF_2525E: return "RT2525e"; 2531 case RT2560_RF_2526: return "RT2526"; 2532 case RT2560_RF_5222: return "RT5222"; 2533 default: return "unknown"; 2534 } 2535 } 2536 2537 static void 2538 rt2560_read_eeprom(struct rt2560_softc *sc) 2539 { 2540 uint16_t val; 2541 int i; 2542 2543 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2544 sc->rf_rev = (val >> 11) & 0x7; 2545 sc->hw_radio = (val >> 10) & 0x1; 2546 sc->led_mode = (val >> 6) & 0x7; 2547 sc->rx_ant = (val >> 4) & 0x3; 2548 sc->tx_ant = (val >> 2) & 0x3; 2549 sc->nb_ant = val & 0x3; 2550 2551 /* read default values for BBP registers */ 2552 for (i = 0; i < 16; i++) { 2553 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2554 sc->bbp_prom[i].reg = val >> 8; 2555 sc->bbp_prom[i].val = val & 0xff; 2556 } 2557 2558 /* read Tx power for all b/g channels */ 2559 for (i = 0; i < 14 / 2; i++) { 2560 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2561 sc->txpow[i * 2] = val >> 8; 2562 sc->txpow[i * 2 + 1] = val & 0xff; 2563 } 2564 2565 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE); 2566 if ((val & 0xff) == 0xff) 2567 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR; 2568 else 2569 sc->rssi_corr = val & 0xff; 2570 DPRINTF(("rssi correction %d, calibrate 0x%02x\n", 2571 sc->rssi_corr, val)); 2572 } 2573 2574 2575 static void 2576 rt2560_scan_start(struct ieee80211com *ic) 2577 { 2578 struct ifnet *ifp = ic->ic_ifp; 2579 struct rt2560_softc *sc = ifp->if_softc; 2580 2581 /* abort TSF synchronization */ 2582 RAL_WRITE(sc, RT2560_CSR14, 0); 2583 rt2560_set_bssid(sc, ifp->if_broadcastaddr); 2584 } 2585 2586 static void 2587 rt2560_scan_end(struct ieee80211com *ic) 2588 { 2589 struct ifnet *ifp = ic->ic_ifp; 2590 struct rt2560_softc *sc = ifp->if_softc; 2591 2592 rt2560_enable_tsf_sync(sc); 2593 /* XXX keep local copy */ 2594 rt2560_set_bssid(sc, ic->ic_bss->ni_bssid); 2595 } 2596 2597 static int 2598 rt2560_bbp_init(struct rt2560_softc *sc) 2599 { 2600 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2601 int i, ntries; 2602 2603 /* wait for BBP to be ready */ 2604 for (ntries = 0; ntries < 100; ntries++) { 2605 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2606 break; 2607 DELAY(1); 2608 } 2609 if (ntries == 100) { 2610 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2611 return EIO; 2612 } 2613 2614 /* initialize BBP registers to default values */ 2615 for (i = 0; i < N(rt2560_def_bbp); i++) { 2616 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2617 rt2560_def_bbp[i].val); 2618 } 2619 #if 0 2620 /* initialize BBP registers to values stored in EEPROM */ 2621 for (i = 0; i < 16; i++) { 2622 if (sc->bbp_prom[i].reg == 0xff) 2623 continue; 2624 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2625 } 2626 #endif 2627 2628 return 0; 2629 #undef N 2630 } 2631 2632 static void 2633 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2634 { 2635 uint32_t tmp; 2636 uint8_t tx; 2637 2638 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2639 if (antenna == 1) 2640 tx |= RT2560_BBP_ANTA; 2641 else if (antenna == 2) 2642 tx |= RT2560_BBP_ANTB; 2643 else 2644 tx |= RT2560_BBP_DIVERSITY; 2645 2646 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2647 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2648 sc->rf_rev == RT2560_RF_5222) 2649 tx |= RT2560_BBP_FLIPIQ; 2650 2651 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2652 2653 /* update values for CCK and OFDM in BBPCSR1 */ 2654 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2655 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2656 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2657 } 2658 2659 static void 2660 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2661 { 2662 uint8_t rx; 2663 2664 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2665 if (antenna == 1) 2666 rx |= RT2560_BBP_ANTA; 2667 else if (antenna == 2) 2668 rx |= RT2560_BBP_ANTB; 2669 else 2670 rx |= RT2560_BBP_DIVERSITY; 2671 2672 /* need to force no I/Q flip for RF 2525e and 2526 */ 2673 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2674 rx &= ~RT2560_BBP_FLIPIQ; 2675 2676 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2677 } 2678 2679 static void 2680 rt2560_init(void *priv) 2681 { 2682 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2683 struct rt2560_softc *sc = priv; 2684 struct ieee80211com *ic = &sc->sc_ic; 2685 struct ifnet *ifp = ic->ic_ifp; 2686 uint32_t tmp; 2687 int i; 2688 2689 2690 2691 rt2560_stop(sc); 2692 2693 RAL_LOCK(sc); 2694 /* setup tx rings */ 2695 tmp = RT2560_PRIO_RING_COUNT << 24 | 2696 RT2560_ATIM_RING_COUNT << 16 | 2697 RT2560_TX_RING_COUNT << 8 | 2698 RT2560_TX_DESC_SIZE; 2699 2700 /* rings must be initialized in this exact order */ 2701 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2702 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2703 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2704 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2705 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2706 2707 /* setup rx ring */ 2708 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2709 2710 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2711 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2712 2713 /* initialize MAC registers to default values */ 2714 for (i = 0; i < N(rt2560_def_mac); i++) 2715 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2716 2717 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2718 rt2560_set_macaddr(sc, ic->ic_myaddr); 2719 2720 /* set basic rate set (will be updated later) */ 2721 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2722 2723 rt2560_set_txantenna(sc, sc->tx_ant); 2724 rt2560_set_rxantenna(sc, sc->rx_ant); 2725 rt2560_update_slot(ifp); 2726 rt2560_update_plcp(sc); 2727 rt2560_update_led(sc, 0, 0); 2728 2729 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2730 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2731 2732 if (rt2560_bbp_init(sc) != 0) { 2733 rt2560_stop(sc); 2734 RAL_UNLOCK(sc); 2735 return; 2736 } 2737 2738 /* set default BSS channel */ 2739 rt2560_set_chan(sc, ic->ic_curchan); 2740 2741 /* kick Rx */ 2742 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2743 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2744 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2745 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2746 tmp |= RT2560_DROP_TODS; 2747 if (!(ifp->if_flags & IFF_PROMISC)) 2748 tmp |= RT2560_DROP_NOT_TO_ME; 2749 } 2750 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2751 2752 /* clear old FCS and Rx FIFO errors */ 2753 RAL_READ(sc, RT2560_CNT0); 2754 RAL_READ(sc, RT2560_CNT4); 2755 2756 /* clear any pending interrupts */ 2757 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2758 2759 /* enable interrupts */ 2760 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2761 2762 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2763 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2764 2765 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2766 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2767 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2768 } else 2769 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2770 2771 RAL_UNLOCK(sc); 2772 #undef N 2773 } 2774 2775 void 2776 rt2560_stop(void *arg) 2777 { 2778 struct rt2560_softc *sc = arg; 2779 struct ieee80211com *ic = &sc->sc_ic; 2780 struct ifnet *ifp = ic->ic_ifp; 2781 volatile int *flags = &sc->sc_flags; 2782 2783 while (*flags & RAL_INPUT_RUNNING) { 2784 tsleep(sc, 0, "ralrunning", hz/10); 2785 } 2786 2787 RAL_LOCK(sc); 2788 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 2789 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2790 sc->sc_tx_timer = 0; 2791 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2792 2793 /* abort Tx */ 2794 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2795 2796 /* disable Rx */ 2797 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2798 2799 /* reset ASIC (imply reset BBP) */ 2800 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2801 RAL_WRITE(sc, RT2560_CSR1, 0); 2802 2803 /* disable interrupts */ 2804 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2805 2806 /* reset Tx and Rx rings */ 2807 rt2560_reset_tx_ring(sc, &sc->txq); 2808 rt2560_reset_tx_ring(sc, &sc->atimq); 2809 rt2560_reset_tx_ring(sc, &sc->prioq); 2810 rt2560_reset_tx_ring(sc, &sc->bcnq); 2811 rt2560_reset_rx_ring(sc, &sc->rxq); 2812 } 2813 RAL_UNLOCK(sc); 2814 } 2815 2816 static int 2817 rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2818 const struct ieee80211_bpf_params *params) 2819 { 2820 struct ieee80211com *ic = ni->ni_ic; 2821 struct ifnet *ifp = ic->ic_ifp; 2822 struct rt2560_softc *sc = ifp->if_softc; 2823 2824 RAL_LOCK(sc); 2825 2826 /* prevent management frames from being sent if we're not ready */ 2827 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2828 RAL_UNLOCK(sc); 2829 m_freem(m); 2830 ieee80211_free_node(ni); 2831 return ENETDOWN; 2832 } 2833 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2834 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2835 RAL_UNLOCK(sc); 2836 m_freem(m); 2837 ieee80211_free_node(ni); 2838 return ENOBUFS; /* XXX */ 2839 } 2840 2841 if (bpf_peers_present(ic->ic_rawbpf)) 2842 bpf_mtap(ic->ic_rawbpf, m); 2843 2844 ifp->if_opackets++; 2845 2846 if (params == NULL) { 2847 /* 2848 * Legacy path; interpret frame contents to decide 2849 * precisely how to send the frame. 2850 */ 2851 if (rt2560_tx_mgt(sc, m, ni) != 0) 2852 goto bad; 2853 } else { 2854 /* 2855 * Caller supplied explicit parameters to use in 2856 * sending the frame. 2857 */ 2858 if (rt2560_tx_raw(sc, m, ni, params)) 2859 goto bad; 2860 } 2861 sc->sc_tx_timer = 5; 2862 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2863 2864 RAL_UNLOCK(sc); 2865 2866 return 0; 2867 bad: 2868 ifp->if_oerrors++; 2869 ieee80211_free_node(ni); 2870 RAL_UNLOCK(sc); 2871 return EIO; /* XXX */ 2872 } 2873 2874