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 1.15 2007/04/12 12:54:07 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/rt2560reg.h> 51 #include <dev/netif/ral/rt2560var.h> 52 53 #define RT2560_RSSI(sc, rssi) \ 54 ((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ? \ 55 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0) 56 57 #ifdef RAL_DEBUG 58 #define DPRINTF(x) do { if (ral_debug > 0) kprintf x; } while (0) 59 #define DPRINTFN(n, x) do { if (ral_debug >= (n)) kprintf x; } while (0) 60 extern int ral_debug; 61 #else 62 #define DPRINTF(x) 63 #define DPRINTFN(n, x) 64 #endif 65 66 static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 67 int); 68 static void rt2560_dma_map_mbuf(void *, bus_dma_segment_t *, int, 69 bus_size_t, int); 70 static int rt2560_alloc_tx_ring(struct rt2560_softc *, 71 struct rt2560_tx_ring *, int); 72 static void rt2560_reset_tx_ring(struct rt2560_softc *, 73 struct rt2560_tx_ring *); 74 static void rt2560_free_tx_ring(struct rt2560_softc *, 75 struct rt2560_tx_ring *); 76 static int rt2560_alloc_rx_ring(struct rt2560_softc *, 77 struct rt2560_rx_ring *, int); 78 static void rt2560_reset_rx_ring(struct rt2560_softc *, 79 struct rt2560_rx_ring *); 80 static void rt2560_free_rx_ring(struct rt2560_softc *, 81 struct rt2560_rx_ring *); 82 static int rt2560_media_change(struct ifnet *); 83 static void rt2560_next_scan(void *); 84 static int rt2560_newstate(struct ieee80211com *, 85 enum ieee80211_state, int); 86 static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 87 static void rt2560_encryption_intr(struct rt2560_softc *); 88 static void rt2560_tx_intr(struct rt2560_softc *); 89 static void rt2560_prio_intr(struct rt2560_softc *); 90 static void rt2560_decryption_intr(struct rt2560_softc *); 91 static void rt2560_rx_intr(struct rt2560_softc *); 92 static void rt2560_beacon_expire(struct rt2560_softc *); 93 static void rt2560_wakeup_expire(struct rt2560_softc *); 94 static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 95 static uint8_t rt2560_plcp_signal(int); 96 static void rt2560_setup_tx_desc(struct rt2560_softc *, 97 struct rt2560_tx_desc *, uint32_t, int, int, int, 98 bus_addr_t); 99 static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 100 struct ieee80211_node *); 101 static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 102 struct ieee80211_node *); 103 static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 104 struct ieee80211_frame *, uint16_t); 105 static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 106 struct ieee80211_node *); 107 static void rt2560_start(struct ifnet *); 108 static void rt2560_watchdog(struct ifnet *); 109 static int rt2560_reset(struct ifnet *); 110 static int rt2560_ioctl(struct ifnet *, u_long, caddr_t, 111 struct ucred *); 112 static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 113 uint8_t); 114 static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 115 static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 116 uint32_t); 117 static void rt2560_set_chan(struct rt2560_softc *, 118 struct ieee80211_channel *); 119 #if 0 120 static void rt2560_disable_rf_tune(struct rt2560_softc *); 121 #endif 122 static void rt2560_enable_tsf_sync(struct rt2560_softc *); 123 static void rt2560_update_plcp(struct rt2560_softc *); 124 static void rt2560_update_slot(struct ifnet *); 125 static void rt2560_set_basicrates(struct rt2560_softc *); 126 static void rt2560_update_led(struct rt2560_softc *, int, int); 127 static void rt2560_set_bssid(struct rt2560_softc *, uint8_t *); 128 static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 129 static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 130 static void rt2560_update_promisc(struct rt2560_softc *); 131 static const char *rt2560_get_rf(int); 132 static void rt2560_read_eeprom(struct rt2560_softc *); 133 static int rt2560_bbp_init(struct rt2560_softc *); 134 static void rt2560_set_txantenna(struct rt2560_softc *, int); 135 static void rt2560_set_rxantenna(struct rt2560_softc *, int); 136 static void rt2560_init(void *); 137 static void rt2560_stop(void *); 138 static void rt2560_intr(void *); 139 140 /* 141 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 142 */ 143 static const struct ieee80211_rateset rt2560_rateset_11a = 144 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 145 146 static const struct ieee80211_rateset rt2560_rateset_11b = 147 { 4, { 2, 4, 11, 22 } }; 148 149 static const struct ieee80211_rateset rt2560_rateset_11g = 150 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 151 152 static const struct { 153 uint32_t reg; 154 uint32_t val; 155 } rt2560_def_mac[] = { 156 RT2560_DEF_MAC 157 }; 158 159 static const struct { 160 uint8_t reg; 161 uint8_t val; 162 } rt2560_def_bbp[] = { 163 RT2560_DEF_BBP 164 }; 165 166 static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 167 static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 168 static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 169 static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 170 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 171 static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 172 static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 173 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 174 175 static const struct { 176 uint8_t chan; 177 uint32_t r1, r2, r4; 178 } rt2560_rf5222[] = { 179 RT2560_RF5222 180 }; 181 182 int 183 rt2560_attach(device_t dev, int id) 184 { 185 struct rt2560_softc *sc = device_get_softc(dev); 186 struct ieee80211com *ic = &sc->sc_ic; 187 struct ifnet *ifp = &ic->ic_if; 188 int error, i; 189 190 callout_init(&sc->scan_ch); 191 192 sc->sc_irq_rid = 0; 193 sc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->sc_irq_rid, 194 RF_ACTIVE | RF_SHAREABLE); 195 if (sc->sc_irq == NULL) { 196 device_printf(dev, "could not allocate interrupt resource\n"); 197 return ENXIO; 198 } 199 200 /* retrieve RT2560 rev. no */ 201 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 202 203 /* retrieve MAC address */ 204 rt2560_get_macaddr(sc, ic->ic_myaddr); 205 206 /* retrieve RF rev. no and various other things from EEPROM */ 207 rt2560_read_eeprom(sc); 208 209 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 210 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 211 212 /* 213 * Allocate Tx and Rx rings. 214 */ 215 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 216 if (error != 0) { 217 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 218 goto fail; 219 } 220 221 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 222 if (error != 0) { 223 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 224 goto fail; 225 } 226 227 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 228 if (error != 0) { 229 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 230 goto fail; 231 } 232 233 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 234 if (error != 0) { 235 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 236 goto fail; 237 } 238 239 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 240 if (error != 0) { 241 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 242 goto fail; 243 } 244 245 sysctl_ctx_init(&sc->sysctl_ctx); 246 sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx, 247 SYSCTL_STATIC_CHILDREN(_hw), 248 OID_AUTO, 249 device_get_nameunit(dev), 250 CTLFLAG_RD, 0, ""); 251 if (sc->sysctl_tree == NULL) { 252 device_printf(dev, "could not add sysctl node\n"); 253 error = ENXIO; 254 goto fail; 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 ifp->if_watchdog = rt2560_watchdog; 264 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN); 265 ifq_set_ready(&ifp->if_snd); 266 267 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 268 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 269 ic->ic_state = IEEE80211_S_INIT; 270 271 ic->ic_ratectl.rc_st_ratectl_cap = IEEE80211_RATECTL_CAP_ONOE | 272 IEEE80211_RATECTL_CAP_SAMPLE; 273 ic->ic_ratectl.rc_st_ratectl = IEEE80211_RATECTL_SAMPLE; 274 275 /* set device capabilities */ 276 ic->ic_caps = 277 IEEE80211_C_IBSS | /* IBSS mode supported */ 278 IEEE80211_C_MONITOR | /* monitor mode supported */ 279 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 280 IEEE80211_C_TXPMGT | /* tx power management */ 281 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 282 IEEE80211_C_SHSLOT | /* short slot time supported */ 283 IEEE80211_C_WEP | /* WEP */ 284 IEEE80211_C_WPA; /* 802.11i */ 285 286 if (sc->rf_rev == RT2560_RF_5222) { 287 /* set supported .11a rates */ 288 ic->ic_sup_rates[IEEE80211_MODE_11A] = rt2560_rateset_11a; 289 290 /* set supported .11a channels */ 291 for (i = 36; i <= 64; i += 4) { 292 ic->ic_channels[i].ic_freq = 293 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 294 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 295 } 296 for (i = 100; i <= 140; i += 4) { 297 ic->ic_channels[i].ic_freq = 298 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 299 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 300 } 301 for (i = 149; i <= 161; i += 4) { 302 ic->ic_channels[i].ic_freq = 303 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 304 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 305 } 306 } 307 308 /* set supported .11b and .11g rates */ 309 ic->ic_sup_rates[IEEE80211_MODE_11B] = rt2560_rateset_11b; 310 ic->ic_sup_rates[IEEE80211_MODE_11G] = rt2560_rateset_11g; 311 312 /* set supported .11b and .11g channels (1 through 14) */ 313 for (i = 1; i <= 14; i++) { 314 ic->ic_channels[i].ic_freq = 315 ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ); 316 ic->ic_channels[i].ic_flags = 317 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 318 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 319 } 320 321 sc->sc_sifs = IEEE80211_DUR_SIFS; /* Default SIFS */ 322 323 ieee80211_ifattach(ic); 324 ic->ic_updateslot = rt2560_update_slot; 325 ic->ic_reset = rt2560_reset; 326 /* enable s/w bmiss handling in sta mode */ 327 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 328 329 /* override state transition machine */ 330 sc->sc_newstate = ic->ic_newstate; 331 ic->ic_newstate = rt2560_newstate; 332 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 333 334 bpfattach_dlt(ifp, DLT_IEEE802_11_RADIO, 335 sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf); 336 337 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 338 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 339 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 340 341 sc->sc_txtap_len = sizeof sc->sc_txtapu; 342 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 343 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 344 345 /* 346 * Add a few sysctl knobs. 347 */ 348 sc->dwelltime = 200; 349 350 SYSCTL_ADD_INT(&sc->sysctl_ctx, 351 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, 352 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 353 354 SYSCTL_ADD_INT(&sc->sysctl_ctx, 355 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, 356 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 357 358 SYSCTL_ADD_INT(&sc->sysctl_ctx, 359 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO, "dwell", 360 CTLFLAG_RW, &sc->dwelltime, 0, 361 "channel dwell time (ms) for AP/station scanning"); 362 363 error = bus_setup_intr(dev, sc->sc_irq, INTR_MPSAFE, rt2560_intr, 364 sc, &sc->sc_ih, ifp->if_serializer); 365 if (error != 0) { 366 device_printf(dev, "could not set up interrupt\n"); 367 bpfdetach(ifp); 368 ieee80211_ifdetach(ic); 369 goto fail; 370 } 371 372 if (bootverbose) 373 ieee80211_announce(ic); 374 return 0; 375 fail: 376 rt2560_detach(sc); 377 return error; 378 } 379 380 int 381 rt2560_detach(void *xsc) 382 { 383 struct rt2560_softc *sc = xsc; 384 struct ieee80211com *ic = &sc->sc_ic; 385 struct ifnet *ifp = ic->ic_ifp; 386 387 if (device_is_attached(sc->sc_dev)) { 388 lwkt_serialize_enter(ifp->if_serializer); 389 390 callout_stop(&sc->scan_ch); 391 392 rt2560_stop(sc); 393 bus_teardown_intr(sc->sc_dev, sc->sc_irq, sc->sc_ih); 394 395 lwkt_serialize_exit(ifp->if_serializer); 396 397 bpfdetach(ifp); 398 ieee80211_ifdetach(ic); 399 } 400 401 rt2560_free_tx_ring(sc, &sc->txq); 402 rt2560_free_tx_ring(sc, &sc->atimq); 403 rt2560_free_tx_ring(sc, &sc->prioq); 404 rt2560_free_tx_ring(sc, &sc->bcnq); 405 rt2560_free_rx_ring(sc, &sc->rxq); 406 407 if (sc->sc_irq != NULL) { 408 bus_release_resource(sc->sc_dev, SYS_RES_IRQ, sc->sc_irq_rid, 409 sc->sc_irq); 410 } 411 412 if (sc->sysctl_tree != NULL) 413 sysctl_ctx_free(&sc->sysctl_ctx); 414 415 return 0; 416 } 417 418 void 419 rt2560_shutdown(void *xsc) 420 { 421 struct rt2560_softc *sc = xsc; 422 struct ifnet *ifp = &sc->sc_ic.ic_if; 423 424 lwkt_serialize_enter(ifp->if_serializer); 425 rt2560_stop(sc); 426 lwkt_serialize_exit(ifp->if_serializer); 427 } 428 429 void 430 rt2560_suspend(void *xsc) 431 { 432 struct rt2560_softc *sc = xsc; 433 struct ifnet *ifp = &sc->sc_ic.ic_if; 434 435 lwkt_serialize_enter(ifp->if_serializer); 436 rt2560_stop(sc); 437 lwkt_serialize_exit(ifp->if_serializer); 438 } 439 440 void 441 rt2560_resume(void *xsc) 442 { 443 struct rt2560_softc *sc = xsc; 444 struct ifnet *ifp = sc->sc_ic.ic_ifp; 445 446 lwkt_serialize_enter(ifp->if_serializer); 447 if (ifp->if_flags & IFF_UP) { 448 ifp->if_init(ifp->if_softc); 449 if (ifp->if_flags & IFF_RUNNING) 450 ifp->if_start(ifp); 451 } 452 lwkt_serialize_exit(ifp->if_serializer); 453 } 454 455 static void 456 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 457 { 458 if (error != 0) 459 return; 460 461 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 462 463 *(bus_addr_t *)arg = segs[0].ds_addr; 464 } 465 466 static int 467 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 468 int count) 469 { 470 int i, error; 471 472 ring->count = count; 473 ring->queued = 0; 474 ring->cur = ring->next = 0; 475 ring->cur_encrypt = ring->next_encrypt = 0; 476 477 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 478 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_TX_DESC_SIZE, 1, 479 count * RT2560_TX_DESC_SIZE, 0, &ring->desc_dmat); 480 if (error != 0) { 481 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 482 goto fail; 483 } 484 485 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 486 BUS_DMA_WAITOK | BUS_DMA_ZERO, &ring->desc_map); 487 if (error != 0) { 488 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 489 goto fail; 490 } 491 492 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 493 count * RT2560_TX_DESC_SIZE, 494 rt2560_dma_map_addr, &ring->physaddr, 0); 495 if (error != 0) { 496 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 497 498 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 499 ring->desc = NULL; 500 goto fail; 501 } 502 503 ring->data = kmalloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 504 M_WAITOK | M_ZERO); 505 506 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 507 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2560_MAX_SCATTER, 508 MCLBYTES, 0, &ring->data_dmat); 509 if (error != 0) { 510 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 511 goto fail; 512 } 513 514 for (i = 0; i < count; i++) { 515 error = bus_dmamap_create(ring->data_dmat, 0, 516 &ring->data[i].map); 517 if (error != 0) { 518 device_printf(sc->sc_dev, "could not create DMA map\n"); 519 goto fail; 520 } 521 } 522 return 0; 523 524 fail: rt2560_free_tx_ring(sc, ring); 525 return error; 526 } 527 528 static void 529 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 530 { 531 struct rt2560_tx_desc *desc; 532 struct rt2560_tx_data *data; 533 int i; 534 535 for (i = 0; i < ring->count; i++) { 536 desc = &ring->desc[i]; 537 data = &ring->data[i]; 538 539 if (data->m != NULL) { 540 bus_dmamap_sync(ring->data_dmat, data->map, 541 BUS_DMASYNC_POSTWRITE); 542 bus_dmamap_unload(ring->data_dmat, data->map); 543 m_freem(data->m); 544 data->m = NULL; 545 } 546 547 if (data->ni != NULL) { 548 ieee80211_free_node(data->ni); 549 data->ni = NULL; 550 } 551 552 desc->flags = 0; 553 } 554 555 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 556 557 ring->queued = 0; 558 ring->cur = ring->next = 0; 559 ring->cur_encrypt = ring->next_encrypt = 0; 560 } 561 562 static void 563 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 564 { 565 struct rt2560_tx_data *data; 566 int i; 567 568 if (ring->desc != NULL) { 569 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 570 BUS_DMASYNC_POSTWRITE); 571 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 572 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 573 ring->desc = NULL; 574 } 575 576 if (ring->desc_dmat != NULL) { 577 bus_dma_tag_destroy(ring->desc_dmat); 578 ring->desc_dmat = NULL; 579 } 580 581 if (ring->data != NULL) { 582 for (i = 0; i < ring->count; i++) { 583 data = &ring->data[i]; 584 585 if (data->m != NULL) { 586 bus_dmamap_sync(ring->data_dmat, data->map, 587 BUS_DMASYNC_POSTWRITE); 588 bus_dmamap_unload(ring->data_dmat, data->map); 589 m_freem(data->m); 590 data->m = NULL; 591 } 592 593 if (data->ni != NULL) { 594 ieee80211_free_node(data->ni); 595 data->ni = NULL; 596 } 597 598 if (data->map != NULL) { 599 bus_dmamap_destroy(ring->data_dmat, data->map); 600 data->map = NULL; 601 } 602 } 603 604 kfree(ring->data, M_DEVBUF); 605 ring->data = NULL; 606 } 607 608 if (ring->data_dmat != NULL) { 609 bus_dma_tag_destroy(ring->data_dmat); 610 ring->data_dmat = NULL; 611 } 612 } 613 614 static int 615 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 616 int count) 617 { 618 struct rt2560_rx_desc *desc; 619 struct rt2560_rx_data *data; 620 bus_addr_t physaddr; 621 int i, error; 622 623 ring->count = count; 624 ring->cur = ring->next = 0; 625 ring->cur_decrypt = 0; 626 627 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 628 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_RX_DESC_SIZE, 1, 629 count * RT2560_RX_DESC_SIZE, 0, &ring->desc_dmat); 630 if (error != 0) { 631 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 632 goto fail; 633 } 634 635 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 636 BUS_DMA_WAITOK | BUS_DMA_ZERO, &ring->desc_map); 637 if (error != 0) { 638 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 639 goto fail; 640 } 641 642 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 643 count * RT2560_RX_DESC_SIZE, 644 rt2560_dma_map_addr, &ring->physaddr, 0); 645 if (error != 0) { 646 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 647 648 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 649 ring->desc = NULL; 650 goto fail; 651 } 652 653 ring->data = kmalloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 654 M_WAITOK | M_ZERO); 655 656 /* 657 * Pre-allocate Rx buffers and populate Rx ring. 658 */ 659 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 660 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, 661 &ring->data_dmat); 662 if (error != 0) { 663 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 664 goto fail; 665 } 666 667 for (i = 0; i < count; i++) { 668 desc = &sc->rxq.desc[i]; 669 data = &sc->rxq.data[i]; 670 671 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 672 if (error != 0) { 673 device_printf(sc->sc_dev, "could not create DMA map\n"); 674 goto fail; 675 } 676 677 data->m = m_getcl(MB_WAIT, MT_DATA, M_PKTHDR); 678 if (data->m == NULL) { 679 device_printf(sc->sc_dev, 680 "could not allocate rx mbuf\n"); 681 error = ENOMEM; 682 goto fail; 683 } 684 685 error = bus_dmamap_load(ring->data_dmat, data->map, 686 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 687 &physaddr, 0); 688 if (error != 0) { 689 device_printf(sc->sc_dev, 690 "could not load rx buf DMA map"); 691 692 m_freem(data->m); 693 data->m = NULL; 694 goto fail; 695 } 696 697 desc->flags = htole32(RT2560_RX_BUSY); 698 desc->physaddr = htole32(physaddr); 699 } 700 701 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 702 703 return 0; 704 705 fail: rt2560_free_rx_ring(sc, ring); 706 return error; 707 } 708 709 static void 710 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 711 { 712 int i; 713 714 for (i = 0; i < ring->count; i++) { 715 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 716 ring->data[i].drop = 0; 717 } 718 719 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 720 721 ring->cur = ring->next = 0; 722 ring->cur_decrypt = 0; 723 } 724 725 static void 726 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 727 { 728 struct rt2560_rx_data *data; 729 730 if (ring->desc != NULL) { 731 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 732 BUS_DMASYNC_POSTWRITE); 733 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 734 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 735 ring->desc = NULL; 736 } 737 738 if (ring->desc_dmat != NULL) { 739 bus_dma_tag_destroy(ring->desc_dmat); 740 ring->desc_dmat = NULL; 741 } 742 743 if (ring->data != NULL) { 744 int i; 745 746 for (i = 0; i < ring->count; i++) { 747 data = &ring->data[i]; 748 749 if (data->m != NULL) { 750 bus_dmamap_sync(ring->data_dmat, data->map, 751 BUS_DMASYNC_POSTREAD); 752 bus_dmamap_unload(ring->data_dmat, data->map); 753 m_freem(data->m); 754 data->m = NULL; 755 } 756 757 if (data->map != NULL) { 758 bus_dmamap_destroy(ring->data_dmat, data->map); 759 data->map = NULL; 760 } 761 } 762 763 kfree(ring->data, M_DEVBUF); 764 ring->data = NULL; 765 } 766 767 if (ring->data_dmat != NULL) { 768 bus_dma_tag_destroy(ring->data_dmat); 769 ring->data_dmat = NULL; 770 } 771 } 772 773 static int 774 rt2560_media_change(struct ifnet *ifp) 775 { 776 struct rt2560_softc *sc = ifp->if_softc; 777 int error; 778 779 error = ieee80211_media_change(ifp); 780 if (error != ENETRESET) 781 return error; 782 783 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) 784 rt2560_init(sc); 785 return 0; 786 } 787 788 /* 789 * This function is called periodically (every 200ms) during scanning to 790 * switch from one channel to another. 791 */ 792 static void 793 rt2560_next_scan(void *arg) 794 { 795 struct rt2560_softc *sc = arg; 796 struct ieee80211com *ic = &sc->sc_ic; 797 struct ifnet *ifp = ic->ic_ifp; 798 799 lwkt_serialize_enter(ifp->if_serializer); 800 if (ic->ic_state == IEEE80211_S_SCAN) 801 ieee80211_next_scan(ic); 802 lwkt_serialize_exit(ifp->if_serializer); 803 } 804 805 static int 806 rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 807 { 808 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 809 enum ieee80211_state ostate; 810 struct ieee80211_node *ni; 811 struct mbuf *m; 812 int error = 0; 813 814 ostate = ic->ic_state; 815 callout_stop(&sc->scan_ch); 816 ieee80211_ratectl_newstate(ic, nstate); 817 818 switch (nstate) { 819 case IEEE80211_S_INIT: 820 if (ostate == IEEE80211_S_RUN) { 821 /* abort TSF synchronization */ 822 RAL_WRITE(sc, RT2560_CSR14, 0); 823 824 /* turn association led off */ 825 rt2560_update_led(sc, 0, 0); 826 } 827 break; 828 829 case IEEE80211_S_SCAN: 830 rt2560_set_chan(sc, ic->ic_curchan); 831 callout_reset(&sc->scan_ch, (sc->dwelltime * hz) / 1000, 832 rt2560_next_scan, sc); 833 break; 834 835 case IEEE80211_S_AUTH: 836 rt2560_set_chan(sc, ic->ic_curchan); 837 break; 838 839 case IEEE80211_S_ASSOC: 840 rt2560_set_chan(sc, ic->ic_curchan); 841 break; 842 843 case IEEE80211_S_RUN: 844 rt2560_set_chan(sc, ic->ic_curchan); 845 846 ni = ic->ic_bss; 847 848 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 849 rt2560_update_plcp(sc); 850 rt2560_set_basicrates(sc); 851 rt2560_set_bssid(sc, ni->ni_bssid); 852 } 853 854 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 855 ic->ic_opmode == IEEE80211_M_IBSS) { 856 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 857 if (m == NULL) { 858 device_printf(sc->sc_dev, 859 "could not allocate beacon\n"); 860 error = ENOBUFS; 861 break; 862 } 863 864 ieee80211_ref_node(ni); 865 error = rt2560_tx_bcn(sc, m, ni); 866 if (error != 0) 867 break; 868 } 869 870 /* turn assocation led on */ 871 rt2560_update_led(sc, 1, 0); 872 873 if (ic->ic_opmode != IEEE80211_M_MONITOR) 874 rt2560_enable_tsf_sync(sc); 875 break; 876 } 877 878 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 879 } 880 881 /* 882 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 883 * 93C66). 884 */ 885 static uint16_t 886 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 887 { 888 uint32_t tmp; 889 uint16_t val; 890 int n; 891 892 /* clock C once before the first command */ 893 RT2560_EEPROM_CTL(sc, 0); 894 895 RT2560_EEPROM_CTL(sc, RT2560_S); 896 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 897 RT2560_EEPROM_CTL(sc, RT2560_S); 898 899 /* write start bit (1) */ 900 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 901 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 902 903 /* write READ opcode (10) */ 904 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 905 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 906 RT2560_EEPROM_CTL(sc, RT2560_S); 907 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 908 909 /* write address (A5-A0 or A7-A0) */ 910 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 911 for (; n >= 0; n--) { 912 RT2560_EEPROM_CTL(sc, RT2560_S | 913 (((addr >> n) & 1) << RT2560_SHIFT_D)); 914 RT2560_EEPROM_CTL(sc, RT2560_S | 915 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 916 } 917 918 RT2560_EEPROM_CTL(sc, RT2560_S); 919 920 /* read data Q15-Q0 */ 921 val = 0; 922 for (n = 15; n >= 0; n--) { 923 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 924 tmp = RAL_READ(sc, RT2560_CSR21); 925 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 926 RT2560_EEPROM_CTL(sc, RT2560_S); 927 } 928 929 RT2560_EEPROM_CTL(sc, 0); 930 931 /* clear Chip Select and clock C */ 932 RT2560_EEPROM_CTL(sc, RT2560_S); 933 RT2560_EEPROM_CTL(sc, 0); 934 RT2560_EEPROM_CTL(sc, RT2560_C); 935 936 return val; 937 } 938 939 /* 940 * Some frames were processed by the hardware cipher engine and are ready for 941 * transmission. 942 */ 943 static void 944 rt2560_encryption_intr(struct rt2560_softc *sc) 945 { 946 struct rt2560_tx_desc *desc; 947 int hw; 948 949 /* retrieve last descriptor index processed by cipher engine */ 950 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 951 hw /= RT2560_TX_DESC_SIZE; 952 953 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 954 BUS_DMASYNC_POSTREAD); 955 956 for (; sc->txq.next_encrypt != hw;) { 957 desc = &sc->txq.desc[sc->txq.next_encrypt]; 958 959 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 960 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 961 break; 962 963 /* for TKIP, swap eiv field to fix a bug in ASIC */ 964 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 965 RT2560_TX_CIPHER_TKIP) 966 desc->eiv = bswap32(desc->eiv); 967 968 /* mark the frame ready for transmission */ 969 desc->flags |= htole32(RT2560_TX_VALID); 970 desc->flags |= htole32(RT2560_TX_BUSY); 971 972 DPRINTFN(15, ("encryption done idx=%u\n", 973 sc->txq.next_encrypt)); 974 975 sc->txq.next_encrypt = 976 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 977 } 978 979 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 980 BUS_DMASYNC_PREWRITE); 981 982 /* kick Tx */ 983 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 984 } 985 986 static void 987 rt2560_tx_intr(struct rt2560_softc *sc) 988 { 989 struct ieee80211com *ic = &sc->sc_ic; 990 struct ifnet *ifp = ic->ic_ifp; 991 992 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 993 BUS_DMASYNC_POSTREAD); 994 995 for (;;) { 996 struct rt2560_tx_desc *desc; 997 struct rt2560_tx_data *data; 998 struct ieee80211_node *ni; 999 int rateidx, data_retries, failed; 1000 struct mbuf *m; 1001 uint32_t flags; 1002 1003 desc = &sc->txq.desc[sc->txq.next]; 1004 data = &sc->txq.data[sc->txq.next]; 1005 1006 flags = le32toh(desc->flags); 1007 1008 if ((flags & RT2560_TX_BUSY) || 1009 (flags & RT2560_TX_CIPHER_BUSY) || 1010 !(flags & RT2560_TX_VALID)) 1011 break; 1012 1013 rateidx = data->rateidx; 1014 ni = data->ni; 1015 m = data->m; 1016 1017 data->ni = NULL; 1018 data->m = NULL; 1019 1020 failed = 0; 1021 switch (flags & RT2560_TX_RESULT_MASK) { 1022 case RT2560_TX_SUCCESS: 1023 DPRINTFN(10, ("data frame sent successfully\n")); 1024 ifp->if_opackets++; 1025 data_retries = 0; 1026 break; 1027 1028 case RT2560_TX_SUCCESS_RETRY: 1029 data_retries = (flags >> 5) & 0x7; 1030 DPRINTFN(9, ("data frame sent after %u retries\n", 1031 data_retries)); 1032 ifp->if_opackets++; 1033 break; 1034 1035 case RT2560_TX_FAIL_RETRY: 1036 DPRINTFN(9, ("sending data frame failed (too much " 1037 "retries)\n")); 1038 ifp->if_oerrors++; 1039 data_retries = 7; 1040 failed = 1; 1041 break; 1042 1043 case RT2560_TX_FAIL_INVALID: 1044 case RT2560_TX_FAIL_OTHER: 1045 default: 1046 data_retries = 7; 1047 failed = 1; 1048 device_printf(sc->sc_dev, "sending data frame failed " 1049 "0x%08x\n", flags); 1050 ifp->if_oerrors++; 1051 break; 1052 } 1053 1054 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1055 BUS_DMASYNC_POSTWRITE); 1056 bus_dmamap_unload(sc->txq.data_dmat, data->map); 1057 1058 if (rateidx >= 0) { 1059 struct ieee80211_ratectl_res res; 1060 1061 res.rc_res_tries = data_retries + 1; 1062 res.rc_res_rateidx = rateidx; 1063 ieee80211_ratectl_tx_complete(ni, m->m_pkthdr.len, 1064 &res, 1, data_retries, 0, failed); 1065 } 1066 1067 m_freem(m); 1068 ieee80211_free_node(ni); 1069 1070 /* descriptor is no longer valid */ 1071 desc->flags &= ~htole32(RT2560_TX_VALID); 1072 1073 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 1074 1075 sc->txq.queued--; 1076 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 1077 } 1078 1079 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1080 BUS_DMASYNC_PREWRITE); 1081 1082 sc->sc_tx_timer = 0; 1083 ifp->if_flags &= ~IFF_OACTIVE; 1084 rt2560_start(ifp); 1085 } 1086 1087 static void 1088 rt2560_prio_intr(struct rt2560_softc *sc) 1089 { 1090 struct ieee80211com *ic = &sc->sc_ic; 1091 struct ifnet *ifp = ic->ic_ifp; 1092 struct rt2560_tx_desc *desc; 1093 struct rt2560_tx_data *data; 1094 1095 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1096 BUS_DMASYNC_POSTREAD); 1097 1098 for (;;) { 1099 desc = &sc->prioq.desc[sc->prioq.next]; 1100 data = &sc->prioq.data[sc->prioq.next]; 1101 1102 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1103 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1104 break; 1105 1106 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1107 case RT2560_TX_SUCCESS: 1108 DPRINTFN(10, ("mgt frame sent successfully\n")); 1109 break; 1110 1111 case RT2560_TX_SUCCESS_RETRY: 1112 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1113 (le32toh(desc->flags) >> 5) & 0x7)); 1114 break; 1115 1116 case RT2560_TX_FAIL_RETRY: 1117 DPRINTFN(9, ("sending mgt frame failed (too much " 1118 "retries)\n")); 1119 break; 1120 1121 case RT2560_TX_FAIL_INVALID: 1122 case RT2560_TX_FAIL_OTHER: 1123 default: 1124 device_printf(sc->sc_dev, "sending mgt frame failed " 1125 "0x%08x\n", le32toh(desc->flags)); 1126 } 1127 1128 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1129 BUS_DMASYNC_POSTWRITE); 1130 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1131 m_freem(data->m); 1132 data->m = NULL; 1133 1134 KASSERT(data->ni == NULL, ("mgmt node is not empty\n")); 1135 1136 /* descriptor is no longer valid */ 1137 desc->flags &= ~htole32(RT2560_TX_VALID); 1138 1139 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1140 1141 sc->prioq.queued--; 1142 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1143 } 1144 1145 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1146 BUS_DMASYNC_PREWRITE); 1147 1148 sc->sc_tx_timer = 0; 1149 ifp->if_flags &= ~IFF_OACTIVE; 1150 rt2560_start(ifp); 1151 } 1152 1153 /* 1154 * Some frames were processed by the hardware cipher engine and are ready for 1155 * transmission to the IEEE802.11 layer. 1156 */ 1157 static void 1158 rt2560_decryption_intr(struct rt2560_softc *sc) 1159 { 1160 struct ieee80211com *ic = &sc->sc_ic; 1161 struct ifnet *ifp = ic->ic_ifp; 1162 struct rt2560_rx_desc *desc; 1163 struct rt2560_rx_data *data; 1164 bus_addr_t physaddr; 1165 struct ieee80211_frame *wh; 1166 struct ieee80211_node *ni; 1167 struct mbuf *mnew, *m; 1168 int hw, error; 1169 1170 /* retrieve last decriptor index processed by cipher engine */ 1171 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1172 hw /= RT2560_RX_DESC_SIZE; 1173 1174 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1175 BUS_DMASYNC_POSTREAD); 1176 1177 for (; sc->rxq.cur_decrypt != hw;) { 1178 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1179 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1180 1181 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1182 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1183 break; 1184 1185 if (data->drop) { 1186 ifp->if_ierrors++; 1187 goto skip; 1188 } 1189 1190 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1191 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1192 ifp->if_ierrors++; 1193 goto skip; 1194 } 1195 1196 /* 1197 * Try to allocate a new mbuf for this ring element and load it 1198 * before processing the current mbuf. If the ring element 1199 * cannot be loaded, drop the received packet and reuse the old 1200 * mbuf. In the unlikely case that the old mbuf can't be 1201 * reloaded either, explicitly panic. 1202 */ 1203 mnew = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR); 1204 if (mnew == NULL) { 1205 ifp->if_ierrors++; 1206 goto skip; 1207 } 1208 1209 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1210 BUS_DMASYNC_POSTREAD); 1211 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1212 1213 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1214 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1215 &physaddr, 0); 1216 if (error != 0) { 1217 m_freem(mnew); 1218 1219 /* try to reload the old mbuf */ 1220 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1221 mtod(data->m, void *), MCLBYTES, 1222 rt2560_dma_map_addr, &physaddr, 0); 1223 if (error != 0) { 1224 /* very unlikely that it will fail... */ 1225 panic("%s: could not load old rx mbuf", 1226 device_get_name(sc->sc_dev)); 1227 } 1228 ifp->if_ierrors++; 1229 goto skip; 1230 } 1231 1232 /* 1233 * New mbuf successfully loaded, update Rx ring and continue 1234 * processing. 1235 */ 1236 m = data->m; 1237 data->m = mnew; 1238 desc->physaddr = htole32(physaddr); 1239 1240 /* finalize mbuf */ 1241 m->m_pkthdr.rcvif = ifp; 1242 m->m_pkthdr.len = m->m_len = 1243 (le32toh(desc->flags) >> 16) & 0xfff; 1244 1245 if (sc->sc_drvbpf != NULL) { 1246 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1247 uint32_t tsf_lo, tsf_hi; 1248 1249 /* get timestamp (low and high 32 bits) */ 1250 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1251 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1252 1253 tap->wr_tsf = 1254 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1255 tap->wr_flags = 0; 1256 tap->wr_rate = rt2560_rxrate(desc); 1257 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1258 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1259 tap->wr_antenna = sc->rx_ant; 1260 tap->wr_antsignal = RT2560_RSSI(sc, desc->rssi); 1261 1262 bpf_ptap(sc->sc_drvbpf, m, tap, sc->sc_rxtap_len); 1263 } 1264 1265 wh = mtod(m, struct ieee80211_frame *); 1266 ni = ieee80211_find_rxnode(ic, 1267 (struct ieee80211_frame_min *)wh); 1268 1269 /* send the frame to the 802.11 layer */ 1270 ieee80211_input(ic, m, ni, RT2560_RSSI(sc, desc->rssi), 0); 1271 1272 /* node is no longer needed */ 1273 ieee80211_free_node(ni); 1274 1275 skip: desc->flags = htole32(RT2560_RX_BUSY); 1276 1277 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1278 1279 sc->rxq.cur_decrypt = 1280 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT; 1281 } 1282 1283 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1284 BUS_DMASYNC_PREWRITE); 1285 } 1286 1287 /* 1288 * Some frames were received. Pass them to the hardware cipher engine before 1289 * sending them to the 802.11 layer. 1290 */ 1291 static void 1292 rt2560_rx_intr(struct rt2560_softc *sc) 1293 { 1294 struct rt2560_rx_desc *desc; 1295 struct rt2560_rx_data *data; 1296 1297 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1298 BUS_DMASYNC_POSTREAD); 1299 1300 for (;;) { 1301 desc = &sc->rxq.desc[sc->rxq.cur]; 1302 data = &sc->rxq.data[sc->rxq.cur]; 1303 1304 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1305 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1306 break; 1307 1308 data->drop = 0; 1309 1310 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1311 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1312 /* 1313 * This should not happen since we did not request 1314 * to receive those frames when we filled RXCSR0. 1315 */ 1316 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1317 le32toh(desc->flags))); 1318 data->drop = 1; 1319 } 1320 1321 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1322 DPRINTFN(5, ("bad length\n")); 1323 data->drop = 1; 1324 } 1325 1326 /* mark the frame for decryption */ 1327 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1328 1329 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1330 1331 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1332 } 1333 1334 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1335 BUS_DMASYNC_PREWRITE); 1336 1337 /* kick decrypt */ 1338 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1339 } 1340 1341 /* 1342 * This function is called periodically in IBSS mode when a new beacon must be 1343 * sent out. 1344 */ 1345 static void 1346 rt2560_beacon_expire(struct rt2560_softc *sc) 1347 { 1348 struct ieee80211com *ic = &sc->sc_ic; 1349 struct rt2560_tx_data *data; 1350 1351 if (ic->ic_opmode != IEEE80211_M_IBSS && 1352 ic->ic_opmode != IEEE80211_M_HOSTAP) 1353 return; 1354 1355 data = &sc->bcnq.data[sc->bcnq.next]; 1356 1357 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1358 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1359 1360 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1361 1362 if (ic->ic_rawbpf != NULL) 1363 bpf_mtap(ic->ic_rawbpf, data->m); 1364 1365 rt2560_tx_bcn(sc, data->m, data->ni); 1366 1367 DPRINTFN(15, ("beacon expired\n")); 1368 1369 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1370 } 1371 1372 /* ARGSUSED */ 1373 static void 1374 rt2560_wakeup_expire(struct rt2560_softc *sc) 1375 { 1376 DPRINTFN(2, ("wakeup expired\n")); 1377 } 1378 1379 static void 1380 rt2560_intr(void *arg) 1381 { 1382 struct rt2560_softc *sc = arg; 1383 struct ifnet *ifp = &sc->sc_ic.ic_if; 1384 uint32_t r; 1385 1386 /* disable interrupts */ 1387 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1388 1389 /* don't re-enable interrupts if we're shutting down */ 1390 if (!(ifp->if_flags & IFF_RUNNING)) 1391 return; 1392 1393 r = RAL_READ(sc, RT2560_CSR7); 1394 RAL_WRITE(sc, RT2560_CSR7, r); 1395 1396 if (r & RT2560_BEACON_EXPIRE) 1397 rt2560_beacon_expire(sc); 1398 1399 if (r & RT2560_WAKEUP_EXPIRE) 1400 rt2560_wakeup_expire(sc); 1401 1402 if (r & RT2560_PRIO_DONE) 1403 rt2560_prio_intr(sc); 1404 1405 if (r & (RT2560_TX_DONE | RT2560_ENCRYPTION_DONE)) { 1406 int i; 1407 1408 for (i = 0; i < 2; ++i) { 1409 rt2560_tx_intr(sc); 1410 rt2560_encryption_intr(sc); 1411 } 1412 } 1413 1414 if (r & (RT2560_DECRYPTION_DONE | RT2560_RX_DONE)) { 1415 int i; 1416 1417 for (i = 0; i < 2; ++i) { 1418 rt2560_decryption_intr(sc); 1419 rt2560_rx_intr(sc); 1420 } 1421 } 1422 1423 /* re-enable interrupts */ 1424 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1425 } 1426 1427 /* quickly determine if a given rate is CCK or OFDM */ 1428 #define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1429 1430 #define RAL_ACK_SIZE (sizeof(struct ieee80211_frame_ack) + IEEE80211_FCS_LEN) 1431 #define RAL_CTS_SIZE (sizeof(struct ieee80211_frame_cts) + IEEE80211_FCS_LEN) 1432 1433 #define RT2560_TXRX_TURNAROUND 10 /* us */ 1434 1435 /* 1436 * This function is only used by the Rx radiotap code. 1437 */ 1438 static uint8_t 1439 rt2560_rxrate(struct rt2560_rx_desc *desc) 1440 { 1441 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1442 /* reverse function of rt2560_plcp_signal */ 1443 switch (desc->rate) { 1444 case 0xb: return 12; 1445 case 0xf: return 18; 1446 case 0xa: return 24; 1447 case 0xe: return 36; 1448 case 0x9: return 48; 1449 case 0xd: return 72; 1450 case 0x8: return 96; 1451 case 0xc: return 108; 1452 } 1453 } else { 1454 if (desc->rate == 10) 1455 return 2; 1456 if (desc->rate == 20) 1457 return 4; 1458 if (desc->rate == 55) 1459 return 11; 1460 if (desc->rate == 110) 1461 return 22; 1462 } 1463 return 2; /* should not get there */ 1464 } 1465 1466 static uint8_t 1467 rt2560_plcp_signal(int rate) 1468 { 1469 switch (rate) { 1470 /* CCK rates (returned values are device-dependent) */ 1471 case 2: return 0x0; 1472 case 4: return 0x1; 1473 case 11: return 0x2; 1474 case 22: return 0x3; 1475 1476 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1477 case 12: return 0xb; 1478 case 18: return 0xf; 1479 case 24: return 0xa; 1480 case 36: return 0xe; 1481 case 48: return 0x9; 1482 case 72: return 0xd; 1483 case 96: return 0x8; 1484 case 108: return 0xc; 1485 1486 /* unsupported rates (should not get there) */ 1487 default: return 0xff; 1488 } 1489 } 1490 1491 static void 1492 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1493 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1494 { 1495 struct ieee80211com *ic = &sc->sc_ic; 1496 uint16_t plcp_length; 1497 int remainder; 1498 1499 desc->flags = htole32(flags); 1500 desc->flags |= htole32(len << 16); 1501 if (!encrypt) 1502 desc->flags |= htole32(RT2560_TX_VALID); 1503 1504 desc->physaddr = htole32(physaddr); 1505 desc->wme = htole16( 1506 RT2560_AIFSN(2) | 1507 RT2560_LOGCWMIN(3) | 1508 RT2560_LOGCWMAX(8)); 1509 1510 /* setup PLCP fields */ 1511 desc->plcp_signal = rt2560_plcp_signal(rate); 1512 desc->plcp_service = 4; 1513 1514 len += IEEE80211_CRC_LEN; 1515 if (RAL_RATE_IS_OFDM(rate)) { 1516 desc->flags |= htole32(RT2560_TX_OFDM); 1517 1518 plcp_length = len & 0xfff; 1519 desc->plcp_length_hi = plcp_length >> 6; 1520 desc->plcp_length_lo = plcp_length & 0x3f; 1521 } else { 1522 plcp_length = (16 * len + rate - 1) / rate; 1523 if (rate == 22) { 1524 remainder = (16 * len) % 22; 1525 if (remainder != 0 && remainder < 7) 1526 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1527 } 1528 desc->plcp_length_hi = plcp_length >> 8; 1529 desc->plcp_length_lo = plcp_length & 0xff; 1530 1531 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1532 desc->plcp_signal |= 0x08; 1533 } 1534 1535 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) 1536 : htole32(RT2560_TX_BUSY); 1537 } 1538 1539 static int 1540 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1541 struct ieee80211_node *ni) 1542 { 1543 struct ieee80211com *ic = &sc->sc_ic; 1544 struct rt2560_tx_desc *desc; 1545 struct rt2560_tx_data *data; 1546 bus_addr_t paddr; 1547 int rate, error; 1548 1549 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1550 data = &sc->bcnq.data[sc->bcnq.cur]; 1551 1552 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1553 1554 error = bus_dmamap_load_mbuf(sc->bcnq.data_dmat, data->map, m0, 1555 rt2560_dma_map_mbuf, &paddr, 1556 BUS_DMA_NOWAIT); 1557 if (error != 0) { 1558 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1559 error); 1560 m_freem(m0); 1561 return error; 1562 } 1563 1564 if (sc->sc_drvbpf != NULL) { 1565 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1566 1567 tap->wt_flags = 0; 1568 tap->wt_rate = rate; 1569 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1570 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1571 tap->wt_antenna = sc->tx_ant; 1572 1573 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len); 1574 } 1575 1576 data->m = m0; 1577 data->ni = ni; 1578 1579 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1580 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, paddr); 1581 1582 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1583 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1584 1585 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1586 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1587 BUS_DMASYNC_PREWRITE); 1588 1589 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1590 1591 return 0; 1592 } 1593 1594 static int 1595 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1596 struct ieee80211_node *ni) 1597 { 1598 struct ieee80211com *ic = &sc->sc_ic; 1599 struct rt2560_tx_desc *desc; 1600 struct rt2560_tx_data *data; 1601 struct ieee80211_frame *wh; 1602 bus_addr_t paddr; 1603 uint16_t dur; 1604 uint32_t flags = 0; 1605 int rate, error; 1606 1607 desc = &sc->prioq.desc[sc->prioq.cur]; 1608 data = &sc->prioq.data[sc->prioq.cur]; 1609 1610 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1611 1612 error = bus_dmamap_load_mbuf(sc->prioq.data_dmat, data->map, m0, 1613 rt2560_dma_map_mbuf, &paddr, 0); 1614 if (error != 0) { 1615 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1616 error); 1617 ieee80211_free_node(ni); 1618 m_freem(m0); 1619 return error; 1620 } 1621 1622 if (sc->sc_drvbpf != NULL) { 1623 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1624 1625 tap->wt_flags = 0; 1626 tap->wt_rate = rate; 1627 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1628 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1629 tap->wt_antenna = sc->tx_ant; 1630 1631 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len); 1632 } 1633 1634 data->m = m0; 1635 data->ni = NULL; 1636 1637 wh = mtod(m0, struct ieee80211_frame *); 1638 1639 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1640 flags |= RT2560_TX_ACK; 1641 1642 dur = ieee80211_txtime(ni, RAL_ACK_SIZE, rate, ic->ic_flags) + 1643 sc->sc_sifs; 1644 *(uint16_t *)wh->i_dur = htole16(dur); 1645 1646 /* tell hardware to add timestamp for probe responses */ 1647 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1648 IEEE80211_FC0_TYPE_MGT && 1649 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1650 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1651 flags |= RT2560_TX_TIMESTAMP; 1652 } 1653 1654 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, paddr); 1655 1656 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1657 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1658 BUS_DMASYNC_PREWRITE); 1659 1660 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1661 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1662 1663 /* kick prio */ 1664 sc->prioq.queued++; 1665 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1666 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1667 1668 ieee80211_free_node(ni); 1669 1670 return 0; 1671 } 1672 1673 /* 1674 * Build a RTS control frame. 1675 */ 1676 static struct mbuf * 1677 rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1678 uint16_t dur) 1679 { 1680 struct ieee80211_frame_rts *rts; 1681 struct mbuf *m; 1682 1683 MGETHDR(m, MB_DONTWAIT, MT_DATA); 1684 if (m == NULL) { 1685 sc->sc_ic.ic_stats.is_tx_nobuf++; 1686 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1687 return NULL; 1688 } 1689 1690 rts = mtod(m, struct ieee80211_frame_rts *); 1691 1692 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1693 IEEE80211_FC0_SUBTYPE_RTS; 1694 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1695 *(uint16_t *)rts->i_dur = htole16(dur); 1696 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1697 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1698 1699 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_rts); 1700 1701 return m; 1702 } 1703 1704 static int 1705 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1706 struct ieee80211_node *ni) 1707 { 1708 struct ieee80211com *ic = &sc->sc_ic; 1709 struct rt2560_tx_desc *desc; 1710 struct rt2560_tx_data *data; 1711 struct ieee80211_frame *wh; 1712 struct ieee80211_key *k; 1713 struct mbuf *mnew; 1714 bus_addr_t paddr; 1715 uint16_t dur; 1716 uint32_t flags = 0; 1717 int rate, error, ackrate, rateidx; 1718 1719 wh = mtod(m0, struct ieee80211_frame *); 1720 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1721 k = ieee80211_crypto_encap(ic, ni, m0); 1722 if (k == NULL) { 1723 m_freem(m0); 1724 return ENOBUFS; 1725 } 1726 1727 /* packet header may have moved, reset our local pointer */ 1728 wh = mtod(m0, struct ieee80211_frame *); 1729 } 1730 1731 ieee80211_ratectl_findrate(ni, m0->m_pkthdr.len, &rateidx, 1); 1732 rate = IEEE80211_RS_RATE(&ni->ni_rates, rateidx); 1733 1734 ackrate = ieee80211_ack_rate(ni, rate); 1735 1736 /* 1737 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1738 * for directed frames only when the length of the MPDU is greater 1739 * than the length threshold indicated by [...]" ic_rtsthreshold. 1740 */ 1741 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1742 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1743 struct mbuf *m; 1744 uint16_t dur; 1745 int rtsrate; 1746 1747 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1748 dur = ieee80211_txtime(ni, m0->m_pkthdr.len + IEEE80211_FCS_LEN, 1749 rate, ic->ic_flags) + 1750 ieee80211_txtime(ni, RAL_CTS_SIZE, rtsrate, ic->ic_flags)+ 1751 ieee80211_txtime(ni, RAL_ACK_SIZE, ackrate, ic->ic_flags)+ 1752 3 * sc->sc_sifs; 1753 1754 m = rt2560_get_rts(sc, wh, dur); 1755 1756 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1757 data = &sc->txq.data[sc->txq.cur_encrypt]; 1758 1759 error = bus_dmamap_load_mbuf(sc->txq.data_dmat, data->map, 1760 m, rt2560_dma_map_mbuf, &paddr, 0); 1761 if (error != 0) { 1762 device_printf(sc->sc_dev, 1763 "could not map mbuf (error %d)\n", error); 1764 m_freem(m); 1765 m_freem(m0); 1766 return error; 1767 } 1768 1769 /* avoid multiple free() of the same node for each fragment */ 1770 ieee80211_ref_node(ni); 1771 1772 data->m = m; 1773 data->ni = ni; 1774 data->rateidx = -1; /* don't count RTS */ 1775 1776 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1777 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, paddr); 1778 1779 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1780 BUS_DMASYNC_PREWRITE); 1781 1782 sc->txq.queued++; 1783 sc->txq.cur_encrypt = 1784 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1785 1786 /* 1787 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1788 * asynchronous data frame shall be transmitted after the CTS 1789 * frame and a SIFS period. 1790 */ 1791 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1792 } 1793 1794 data = &sc->txq.data[sc->txq.cur_encrypt]; 1795 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1796 1797 error = bus_dmamap_load_mbuf(sc->txq.data_dmat, data->map, m0, 1798 rt2560_dma_map_mbuf, &paddr, 0); 1799 if (error != 0 && error != EFBIG) { 1800 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1801 error); 1802 m_freem(m0); 1803 return error; 1804 } 1805 if (error != 0) { 1806 mnew = m_defrag(m0, MB_DONTWAIT); 1807 if (mnew == NULL) { 1808 device_printf(sc->sc_dev, 1809 "could not defragment mbuf\n"); 1810 m_freem(m0); 1811 return ENOBUFS; 1812 } 1813 m0 = mnew; 1814 1815 error = bus_dmamap_load_mbuf(sc->txq.data_dmat, data->map, 1816 m0, rt2560_dma_map_mbuf, &paddr, 1817 0); 1818 if (error != 0) { 1819 device_printf(sc->sc_dev, 1820 "could not map mbuf (error %d)\n", error); 1821 m_freem(m0); 1822 return error; 1823 } 1824 1825 /* packet header may have moved, reset our local pointer */ 1826 wh = mtod(m0, struct ieee80211_frame *); 1827 } 1828 1829 if (sc->sc_drvbpf != NULL) { 1830 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1831 1832 tap->wt_flags = 0; 1833 tap->wt_rate = rate; 1834 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1835 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1836 tap->wt_antenna = sc->tx_ant; 1837 1838 bpf_ptap(sc->sc_drvbpf, m0, tap, sc->sc_txtap_len); 1839 } 1840 1841 data->m = m0; 1842 data->ni = ni; 1843 data->rateidx = rateidx; 1844 1845 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1846 flags |= RT2560_TX_ACK; 1847 dur = ieee80211_txtime(ni, RAL_ACK_SIZE, ackrate, ic->ic_flags)+ 1848 sc->sc_sifs; 1849 *(uint16_t *)wh->i_dur = htole16(dur); 1850 } 1851 1852 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, paddr); 1853 1854 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1855 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1856 BUS_DMASYNC_PREWRITE); 1857 1858 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1859 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1860 1861 /* kick encrypt */ 1862 sc->txq.queued++; 1863 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1864 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 1865 1866 return 0; 1867 } 1868 1869 static void 1870 rt2560_start(struct ifnet *ifp) 1871 { 1872 struct rt2560_softc *sc = ifp->if_softc; 1873 struct ieee80211com *ic = &sc->sc_ic; 1874 struct mbuf *m0; 1875 struct ether_header *eh; 1876 struct ieee80211_node *ni; 1877 1878 /* prevent management frames from being sent if we're not ready */ 1879 if (!(ifp->if_flags & IFF_RUNNING)) 1880 return; 1881 1882 for (;;) { 1883 IF_POLL(&ic->ic_mgtq, m0); 1884 if (m0 != NULL) { 1885 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 1886 ifp->if_flags |= IFF_OACTIVE; 1887 break; 1888 } 1889 IF_DEQUEUE(&ic->ic_mgtq, m0); 1890 1891 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1892 m0->m_pkthdr.rcvif = NULL; 1893 1894 if (ic->ic_rawbpf != NULL) 1895 bpf_mtap(ic->ic_rawbpf, m0); 1896 1897 if (rt2560_tx_mgt(sc, m0, ni) != 0) 1898 break; 1899 1900 } else { 1901 if (ic->ic_state != IEEE80211_S_RUN) 1902 break; 1903 m0 = ifq_poll(&ifp->if_snd); 1904 if (m0 == NULL) 1905 break; 1906 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 1907 ifp->if_flags |= IFF_OACTIVE; 1908 break; 1909 } 1910 m0 = ifq_dequeue(&ifp->if_snd, m0); 1911 1912 if (m0->m_len < sizeof (struct ether_header) && 1913 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 1914 continue; 1915 1916 eh = mtod(m0, struct ether_header *); 1917 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1918 if (ni == NULL) { 1919 m_freem(m0); 1920 continue; 1921 } 1922 BPF_MTAP(ifp, m0); 1923 1924 m0 = ieee80211_encap(ic, m0, ni); 1925 if (m0 == NULL) { 1926 ieee80211_free_node(ni); 1927 continue; 1928 } 1929 1930 if (ic->ic_rawbpf != NULL) 1931 bpf_mtap(ic->ic_rawbpf, m0); 1932 1933 if (rt2560_tx_data(sc, m0, ni) != 0) { 1934 ieee80211_free_node(ni); 1935 ifp->if_oerrors++; 1936 break; 1937 } 1938 } 1939 1940 sc->sc_tx_timer = 5; 1941 ifp->if_timer = 1; 1942 } 1943 } 1944 1945 static void 1946 rt2560_watchdog(struct ifnet *ifp) 1947 { 1948 struct rt2560_softc *sc = ifp->if_softc; 1949 struct ieee80211com *ic = &sc->sc_ic; 1950 1951 ifp->if_timer = 0; 1952 1953 if (sc->sc_tx_timer > 0) { 1954 if (--sc->sc_tx_timer == 0) { 1955 device_printf(sc->sc_dev, "device timeout\n"); 1956 rt2560_init(sc); 1957 ifp->if_oerrors++; 1958 return; 1959 } 1960 ifp->if_timer = 1; 1961 } 1962 1963 ieee80211_watchdog(ic); 1964 } 1965 1966 /* 1967 * This function allows for fast channel switching in monitor mode (used by 1968 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 1969 * generate a new beacon frame. 1970 */ 1971 static int 1972 rt2560_reset(struct ifnet *ifp) 1973 { 1974 struct rt2560_softc *sc = ifp->if_softc; 1975 struct ieee80211com *ic = &sc->sc_ic; 1976 1977 if (ic->ic_opmode != IEEE80211_M_MONITOR) 1978 return ENETRESET; 1979 1980 rt2560_set_chan(sc, ic->ic_curchan); 1981 1982 return 0; 1983 } 1984 1985 static int 1986 rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 1987 { 1988 struct rt2560_softc *sc = ifp->if_softc; 1989 struct ieee80211com *ic = &sc->sc_ic; 1990 int error = 0; 1991 1992 switch (cmd) { 1993 case SIOCSIFFLAGS: 1994 if (ifp->if_flags & IFF_UP) { 1995 if (ifp->if_flags & IFF_RUNNING) 1996 rt2560_update_promisc(sc); 1997 else 1998 rt2560_init(sc); 1999 } else { 2000 if (ifp->if_flags & IFF_RUNNING) 2001 rt2560_stop(sc); 2002 } 2003 break; 2004 2005 default: 2006 error = ieee80211_ioctl(ic, cmd, data, cr); 2007 } 2008 2009 if (error == ENETRESET) { 2010 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == 2011 (IFF_UP | IFF_RUNNING) && 2012 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2013 rt2560_init(sc); 2014 error = 0; 2015 } 2016 2017 return error; 2018 } 2019 2020 static void 2021 rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2022 { 2023 uint32_t tmp; 2024 int ntries; 2025 2026 for (ntries = 0; ntries < 100; ntries++) { 2027 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2028 break; 2029 DELAY(1); 2030 } 2031 if (ntries == 100) { 2032 device_printf(sc->sc_dev, "could not write to BBP\n"); 2033 return; 2034 } 2035 2036 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2037 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2038 2039 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2040 } 2041 2042 static uint8_t 2043 rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2044 { 2045 uint32_t val; 2046 int ntries; 2047 2048 for (ntries = 0; ntries < 100; ntries++) { 2049 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2050 break; 2051 DELAY(1); 2052 } 2053 if (ntries == 100) { 2054 device_printf(sc->sc_dev, "could not read from BBP\n"); 2055 return 0; 2056 } 2057 2058 val = RT2560_BBP_BUSY | reg << 8; 2059 RAL_WRITE(sc, RT2560_BBPCSR, val); 2060 2061 for (ntries = 0; ntries < 100; ntries++) { 2062 val = RAL_READ(sc, RT2560_BBPCSR); 2063 if (!(val & RT2560_BBP_BUSY)) 2064 return val & 0xff; 2065 DELAY(1); 2066 } 2067 2068 device_printf(sc->sc_dev, "could not read from BBP\n"); 2069 return 0; 2070 } 2071 2072 static void 2073 rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2074 { 2075 uint32_t tmp; 2076 int ntries; 2077 2078 for (ntries = 0; ntries < 100; ntries++) { 2079 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2080 break; 2081 DELAY(1); 2082 } 2083 if (ntries == 100) { 2084 device_printf(sc->sc_dev, "could not write to RF\n"); 2085 return; 2086 } 2087 2088 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2089 (reg & 0x3); 2090 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2091 2092 /* remember last written value in sc */ 2093 sc->rf_regs[reg] = val; 2094 2095 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2096 } 2097 2098 static void 2099 rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2100 { 2101 struct ieee80211com *ic = &sc->sc_ic; 2102 uint8_t power, tmp; 2103 u_int i, chan; 2104 2105 chan = ieee80211_chan2ieee(ic, c); 2106 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2107 return; 2108 2109 if (IEEE80211_IS_CHAN_2GHZ(c)) 2110 power = min(sc->txpow[chan - 1], 31); 2111 else 2112 power = 31; 2113 2114 /* adjust txpower using ifconfig settings */ 2115 power -= (100 - ic->ic_txpowlimit) / 8; 2116 2117 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2118 2119 switch (sc->rf_rev) { 2120 case RT2560_RF_2522: 2121 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2122 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2123 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2124 break; 2125 2126 case RT2560_RF_2523: 2127 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2128 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2129 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2130 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2131 break; 2132 2133 case RT2560_RF_2524: 2134 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2135 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2136 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2137 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2138 break; 2139 2140 case RT2560_RF_2525: 2141 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2142 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2143 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2144 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2145 2146 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2147 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2148 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2149 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2150 break; 2151 2152 case RT2560_RF_2525E: 2153 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2154 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2155 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2156 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2157 break; 2158 2159 case RT2560_RF_2526: 2160 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2161 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2162 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2163 2164 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2165 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2166 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2167 break; 2168 2169 /* dual-band RF */ 2170 case RT2560_RF_5222: 2171 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2172 2173 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2174 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2175 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2176 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2177 break; 2178 } 2179 2180 if (ic->ic_state != IEEE80211_S_SCAN) { 2181 /* set Japan filter bit for channel 14 */ 2182 tmp = rt2560_bbp_read(sc, 70); 2183 2184 tmp &= ~RT2560_JAPAN_FILTER; 2185 if (chan == 14) 2186 tmp |= RT2560_JAPAN_FILTER; 2187 2188 rt2560_bbp_write(sc, 70, tmp); 2189 2190 /* clear CRC errors */ 2191 RAL_READ(sc, RT2560_CNT0); 2192 } 2193 2194 sc->sc_sifs = IEEE80211_IS_CHAN_5GHZ(c) ? IEEE80211_DUR_OFDM_SIFS 2195 : IEEE80211_DUR_SIFS; 2196 } 2197 2198 #if 0 2199 /* 2200 * Disable RF auto-tuning. 2201 */ 2202 static void 2203 rt2560_disable_rf_tune(struct rt2560_softc *sc) 2204 { 2205 uint32_t tmp; 2206 2207 if (sc->rf_rev != RT2560_RF_2523) { 2208 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2209 rt2560_rf_write(sc, RAL_RF1, tmp); 2210 } 2211 2212 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2213 rt2560_rf_write(sc, RAL_RF3, tmp); 2214 2215 DPRINTFN(2, ("disabling RF autotune\n")); 2216 } 2217 #endif 2218 2219 /* 2220 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2221 * synchronization. 2222 */ 2223 static void 2224 rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2225 { 2226 struct ieee80211com *ic = &sc->sc_ic; 2227 uint16_t logcwmin, preload; 2228 uint32_t tmp; 2229 2230 /* first, disable TSF synchronization */ 2231 RAL_WRITE(sc, RT2560_CSR14, 0); 2232 2233 tmp = 16 * ic->ic_bss->ni_intval; 2234 RAL_WRITE(sc, RT2560_CSR12, tmp); 2235 2236 RAL_WRITE(sc, RT2560_CSR13, 0); 2237 2238 logcwmin = 5; 2239 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2240 tmp = logcwmin << 16 | preload; 2241 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2242 2243 /* finally, enable TSF synchronization */ 2244 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2245 if (ic->ic_opmode == IEEE80211_M_STA) 2246 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2247 else 2248 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2249 RT2560_ENABLE_BEACON_GENERATOR; 2250 RAL_WRITE(sc, RT2560_CSR14, tmp); 2251 2252 DPRINTF(("enabling TSF synchronization\n")); 2253 } 2254 2255 static void 2256 rt2560_update_plcp(struct rt2560_softc *sc) 2257 { 2258 struct ieee80211com *ic = &sc->sc_ic; 2259 2260 /* no short preamble for 1Mbps */ 2261 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2262 2263 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2264 /* values taken from the reference driver */ 2265 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2266 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2267 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2268 } else { 2269 /* same values as above or'ed 0x8 */ 2270 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2271 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2272 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2273 } 2274 2275 DPRINTF(("updating PLCP for %s preamble\n", 2276 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2277 } 2278 2279 /* 2280 * This function can be called by ieee80211_set_shortslottime(). Refer to 2281 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2282 */ 2283 static void 2284 rt2560_update_slot(struct ifnet *ifp) 2285 { 2286 struct rt2560_softc *sc = ifp->if_softc; 2287 struct ieee80211com *ic = &sc->sc_ic; 2288 uint8_t slottime; 2289 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2290 uint32_t tmp; 2291 2292 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2293 2294 /* update the MAC slot boundaries */ 2295 tx_sifs = sc->sc_sifs - RT2560_TXRX_TURNAROUND; 2296 tx_pifs = tx_sifs + slottime; 2297 tx_difs = tx_sifs + 2 * slottime; 2298 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2299 2300 tmp = RAL_READ(sc, RT2560_CSR11); 2301 tmp = (tmp & ~0x1f00) | slottime << 8; 2302 RAL_WRITE(sc, RT2560_CSR11, tmp); 2303 2304 tmp = tx_pifs << 16 | tx_sifs; 2305 RAL_WRITE(sc, RT2560_CSR18, tmp); 2306 2307 tmp = eifs << 16 | tx_difs; 2308 RAL_WRITE(sc, RT2560_CSR19, tmp); 2309 2310 DPRINTF(("setting slottime to %uus\n", slottime)); 2311 } 2312 2313 static void 2314 rt2560_set_basicrates(struct rt2560_softc *sc) 2315 { 2316 struct ieee80211com *ic = &sc->sc_ic; 2317 2318 /* update basic rate set */ 2319 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2320 /* 11b basic rates: 1, 2Mbps */ 2321 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2322 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2323 /* 11a basic rates: 6, 12, 24Mbps */ 2324 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2325 } else { 2326 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2327 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2328 } 2329 } 2330 2331 static void 2332 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2333 { 2334 uint32_t tmp; 2335 2336 /* set ON period to 70ms and OFF period to 30ms */ 2337 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2338 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2339 } 2340 2341 static void 2342 rt2560_set_bssid(struct rt2560_softc *sc, uint8_t *bssid) 2343 { 2344 uint32_t tmp; 2345 2346 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2347 RAL_WRITE(sc, RT2560_CSR5, tmp); 2348 2349 tmp = bssid[4] | bssid[5] << 8; 2350 RAL_WRITE(sc, RT2560_CSR6, tmp); 2351 2352 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2353 } 2354 2355 static void 2356 rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2357 { 2358 uint32_t tmp; 2359 2360 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2361 RAL_WRITE(sc, RT2560_CSR3, tmp); 2362 2363 tmp = addr[4] | addr[5] << 8; 2364 RAL_WRITE(sc, RT2560_CSR4, tmp); 2365 2366 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2367 } 2368 2369 static void 2370 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2371 { 2372 uint32_t tmp; 2373 2374 tmp = RAL_READ(sc, RT2560_CSR3); 2375 addr[0] = tmp & 0xff; 2376 addr[1] = (tmp >> 8) & 0xff; 2377 addr[2] = (tmp >> 16) & 0xff; 2378 addr[3] = (tmp >> 24); 2379 2380 tmp = RAL_READ(sc, RT2560_CSR4); 2381 addr[4] = tmp & 0xff; 2382 addr[5] = (tmp >> 8) & 0xff; 2383 } 2384 2385 static void 2386 rt2560_update_promisc(struct rt2560_softc *sc) 2387 { 2388 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2389 uint32_t tmp; 2390 2391 tmp = RAL_READ(sc, RT2560_RXCSR0); 2392 2393 tmp &= ~RT2560_DROP_NOT_TO_ME; 2394 if (!(ifp->if_flags & IFF_PROMISC)) 2395 tmp |= RT2560_DROP_NOT_TO_ME; 2396 2397 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2398 2399 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2400 "entering" : "leaving")); 2401 } 2402 2403 static const char * 2404 rt2560_get_rf(int rev) 2405 { 2406 switch (rev) { 2407 case RT2560_RF_2522: return "RT2522"; 2408 case RT2560_RF_2523: return "RT2523"; 2409 case RT2560_RF_2524: return "RT2524"; 2410 case RT2560_RF_2525: return "RT2525"; 2411 case RT2560_RF_2525E: return "RT2525e"; 2412 case RT2560_RF_2526: return "RT2526"; 2413 case RT2560_RF_5222: return "RT5222"; 2414 default: return "unknown"; 2415 } 2416 } 2417 2418 static void 2419 rt2560_read_eeprom(struct rt2560_softc *sc) 2420 { 2421 uint16_t val; 2422 int i; 2423 2424 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2425 sc->rf_rev = (val >> 11) & 0x7; 2426 sc->hw_radio = (val >> 10) & 0x1; 2427 sc->led_mode = (val >> 6) & 0x7; 2428 sc->rx_ant = (val >> 4) & 0x3; 2429 sc->tx_ant = (val >> 2) & 0x3; 2430 sc->nb_ant = val & 0x3; 2431 2432 /* read default values for BBP registers */ 2433 for (i = 0; i < 16; i++) { 2434 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2435 sc->bbp_prom[i].reg = val >> 8; 2436 sc->bbp_prom[i].val = val & 0xff; 2437 } 2438 2439 /* read Tx power for all b/g channels */ 2440 for (i = 0; i < 14 / 2; i++) { 2441 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2442 sc->txpow[i * 2] = val >> 8; 2443 sc->txpow[i * 2 + 1] = val & 0xff; 2444 } 2445 2446 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE); 2447 if ((val & 0xff) == 0xff) 2448 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR; 2449 else 2450 sc->rssi_corr = val & 0xff; 2451 DPRINTF(("rssi correction %d, calibrate 0x%02x\n", 2452 sc->rssi_corr, val)); 2453 } 2454 2455 static int 2456 rt2560_bbp_init(struct rt2560_softc *sc) 2457 { 2458 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2459 int i, ntries; 2460 2461 /* wait for BBP to be ready */ 2462 for (ntries = 0; ntries < 100; ntries++) { 2463 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2464 break; 2465 DELAY(1); 2466 } 2467 if (ntries == 100) { 2468 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2469 return EIO; 2470 } 2471 2472 /* initialize BBP registers to default values */ 2473 for (i = 0; i < N(rt2560_def_bbp); i++) { 2474 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2475 rt2560_def_bbp[i].val); 2476 } 2477 2478 #if 0 2479 /* initialize BBP registers to values stored in EEPROM */ 2480 for (i = 0; i < 16; i++) { 2481 if (sc->bbp_prom[i].reg == 0xff) 2482 continue; 2483 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2484 } 2485 #endif 2486 2487 return 0; 2488 #undef N 2489 } 2490 2491 static void 2492 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2493 { 2494 uint32_t tmp; 2495 uint8_t tx; 2496 2497 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2498 if (antenna == 1) 2499 tx |= RT2560_BBP_ANTA; 2500 else if (antenna == 2) 2501 tx |= RT2560_BBP_ANTB; 2502 else 2503 tx |= RT2560_BBP_DIVERSITY; 2504 2505 /* need to force I/Q flip for RF 2525e and 5222 */ 2506 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_5222) 2507 tx |= RT2560_BBP_FLIPIQ; 2508 2509 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2510 2511 /* update values for CCK and OFDM in BBPCSR1 */ 2512 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2513 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2514 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2515 } 2516 2517 static void 2518 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2519 { 2520 uint8_t rx; 2521 2522 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2523 if (antenna == 1) 2524 rx |= RT2560_BBP_ANTA; 2525 else if (antenna == 2) 2526 rx |= RT2560_BBP_ANTB; 2527 else 2528 rx |= RT2560_BBP_DIVERSITY; 2529 2530 /* need to force no I/Q flip for RF 2525e */ 2531 if (sc->rf_rev == RT2560_RF_2525E) 2532 rx &= ~RT2560_BBP_FLIPIQ; 2533 2534 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2535 } 2536 2537 static void 2538 rt2560_init(void *priv) 2539 { 2540 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2541 struct rt2560_softc *sc = priv; 2542 struct ieee80211com *ic = &sc->sc_ic; 2543 struct ifnet *ifp = ic->ic_ifp; 2544 uint32_t tmp; 2545 int i; 2546 2547 rt2560_stop(sc); 2548 2549 /* setup tx rings */ 2550 tmp = RT2560_PRIO_RING_COUNT << 24 | 2551 RT2560_ATIM_RING_COUNT << 16 | 2552 RT2560_TX_RING_COUNT << 8 | 2553 RT2560_TX_DESC_SIZE; 2554 2555 /* rings must be initialized in this exact order */ 2556 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2557 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2558 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2559 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2560 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2561 2562 /* setup rx ring */ 2563 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2564 2565 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2566 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2567 2568 /* initialize MAC registers to default values */ 2569 for (i = 0; i < N(rt2560_def_mac); i++) 2570 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2571 2572 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2573 rt2560_set_macaddr(sc, ic->ic_myaddr); 2574 2575 /* set basic rate set (will be updated later) */ 2576 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2577 2578 rt2560_update_slot(ifp); 2579 rt2560_update_plcp(sc); 2580 rt2560_update_led(sc, 0, 0); 2581 2582 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2583 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2584 2585 if (rt2560_bbp_init(sc) != 0) { 2586 rt2560_stop(sc); 2587 return; 2588 } 2589 2590 rt2560_set_txantenna(sc, sc->tx_ant); 2591 rt2560_set_rxantenna(sc, sc->rx_ant); 2592 2593 /* set default BSS channel */ 2594 rt2560_set_chan(sc, ic->ic_curchan); 2595 2596 /* kick Rx */ 2597 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2598 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2599 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2600 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2601 tmp |= RT2560_DROP_TODS; 2602 if (!(ifp->if_flags & IFF_PROMISC)) 2603 tmp |= RT2560_DROP_NOT_TO_ME; 2604 } 2605 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2606 2607 /* clear old FCS and Rx FIFO errors */ 2608 RAL_READ(sc, RT2560_CNT0); 2609 RAL_READ(sc, RT2560_CNT4); 2610 2611 /* clear any pending interrupts */ 2612 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2613 2614 /* enable interrupts */ 2615 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2616 2617 ifp->if_flags &= ~IFF_OACTIVE; 2618 ifp->if_flags |= IFF_RUNNING; 2619 2620 /* XXX */ 2621 if (ic->ic_flags & IEEE80211_F_PRIVACY) { 2622 int i; 2623 2624 ic->ic_flags &= ~IEEE80211_F_DROPUNENC; 2625 for (i = 0; i < IEEE80211_WEP_NKID; ++i) { 2626 struct ieee80211_key *wk = &ic->ic_nw_keys[i]; 2627 2628 if (wk->wk_keylen == 0) 2629 continue; 2630 if (wk->wk_flags & IEEE80211_KEY_XMIT) 2631 wk->wk_flags |= IEEE80211_KEY_SWCRYPT; 2632 } 2633 } 2634 2635 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2636 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2637 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2638 } else 2639 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2640 #undef N 2641 } 2642 2643 void 2644 rt2560_stop(void *priv) 2645 { 2646 struct rt2560_softc *sc = priv; 2647 struct ieee80211com *ic = &sc->sc_ic; 2648 struct ifnet *ifp = ic->ic_ifp; 2649 2650 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2651 2652 sc->sc_tx_timer = 0; 2653 ifp->if_timer = 0; 2654 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 2655 2656 /* abort Tx */ 2657 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2658 2659 /* disable Rx */ 2660 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2661 2662 /* reset ASIC (imply reset BBP) */ 2663 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2664 RAL_WRITE(sc, RT2560_CSR1, 0); 2665 2666 /* disable interrupts */ 2667 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2668 2669 /* reset Tx and Rx rings */ 2670 rt2560_reset_tx_ring(sc, &sc->txq); 2671 rt2560_reset_tx_ring(sc, &sc->atimq); 2672 rt2560_reset_tx_ring(sc, &sc->prioq); 2673 rt2560_reset_tx_ring(sc, &sc->bcnq); 2674 rt2560_reset_rx_ring(sc, &sc->rxq); 2675 } 2676 2677 static void 2678 rt2560_dma_map_mbuf(void *arg, bus_dma_segment_t *seg, int nseg, 2679 bus_size_t map_size __unused, int error) 2680 { 2681 if (error) 2682 return; 2683 2684 KASSERT(nseg == 1, ("too many dma segments\n")); 2685 *((bus_addr_t *)arg) = seg->ds_addr; 2686 } 2687