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/module.h> 37 #include <sys/bus.h> 38 #include <sys/endian.h> 39 40 #include <machine/bus.h> 41 #include <machine/resource.h> 42 #include <sys/rman.h> 43 44 #include <net/bpf.h> 45 #include <net/if.h> 46 #include <net/if_arp.h> 47 #include <net/ethernet.h> 48 #include <net/if_dl.h> 49 #include <net/if_media.h> 50 #include <net/if_types.h> 51 52 #include <net80211/ieee80211_var.h> 53 #include <net80211/ieee80211_radiotap.h> 54 55 #include <netinet/in.h> 56 #include <netinet/in_systm.h> 57 #include <netinet/in_var.h> 58 #include <netinet/ip.h> 59 #include <netinet/if_ether.h> 60 61 #include <dev/ral/if_ralrate.h> 62 #include <dev/ral/rt2560reg.h> 63 #include <dev/ral/rt2560var.h> 64 65 #ifdef RAL_DEBUG 66 #define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 67 #define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 68 extern int ral_debug; 69 #else 70 #define DPRINTF(x) 71 #define DPRINTFN(n, x) 72 #endif 73 74 static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 75 int); 76 static int rt2560_alloc_tx_ring(struct rt2560_softc *, 77 struct rt2560_tx_ring *, int); 78 static void rt2560_reset_tx_ring(struct rt2560_softc *, 79 struct rt2560_tx_ring *); 80 static void rt2560_free_tx_ring(struct rt2560_softc *, 81 struct rt2560_tx_ring *); 82 static int rt2560_alloc_rx_ring(struct rt2560_softc *, 83 struct rt2560_rx_ring *, int); 84 static void rt2560_reset_rx_ring(struct rt2560_softc *, 85 struct rt2560_rx_ring *); 86 static void rt2560_free_rx_ring(struct rt2560_softc *, 87 struct rt2560_rx_ring *); 88 static struct ieee80211_node *rt2560_node_alloc( 89 struct ieee80211_node_table *); 90 static int rt2560_media_change(struct ifnet *); 91 static void rt2560_next_scan(void *); 92 static void rt2560_iter_func(void *, struct ieee80211_node *); 93 static void rt2560_update_rssadapt(void *); 94 static int rt2560_newstate(struct ieee80211com *, 95 enum ieee80211_state, int); 96 static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 97 static void rt2560_encryption_intr(struct rt2560_softc *); 98 static void rt2560_tx_intr(struct rt2560_softc *); 99 static void rt2560_prio_intr(struct rt2560_softc *); 100 static void rt2560_decryption_intr(struct rt2560_softc *); 101 static void rt2560_rx_intr(struct rt2560_softc *); 102 static void rt2560_beacon_expire(struct rt2560_softc *); 103 static void rt2560_wakeup_expire(struct rt2560_softc *); 104 static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 105 static int rt2560_ack_rate(struct ieee80211com *, int); 106 static uint16_t rt2560_txtime(int, int, uint32_t); 107 static uint8_t rt2560_plcp_signal(int); 108 static void rt2560_setup_tx_desc(struct rt2560_softc *, 109 struct rt2560_tx_desc *, uint32_t, int, int, int, 110 bus_addr_t); 111 static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 112 struct ieee80211_node *); 113 static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 114 struct ieee80211_node *); 115 static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 116 struct ieee80211_frame *, uint16_t); 117 static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 118 struct ieee80211_node *); 119 static void rt2560_start(struct ifnet *); 120 static void rt2560_watchdog(struct ifnet *); 121 static int rt2560_reset(struct ifnet *); 122 static int rt2560_ioctl(struct ifnet *, u_long, caddr_t); 123 static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 124 uint8_t); 125 static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 126 static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 127 uint32_t); 128 static void rt2560_set_chan(struct rt2560_softc *, 129 struct ieee80211_channel *); 130 #if 0 131 static void rt2560_disable_rf_tune(struct rt2560_softc *); 132 #endif 133 static void rt2560_enable_tsf_sync(struct rt2560_softc *); 134 static void rt2560_update_plcp(struct rt2560_softc *); 135 static void rt2560_update_slot(struct ifnet *); 136 static void rt2560_set_basicrates(struct rt2560_softc *); 137 static void rt2560_update_led(struct rt2560_softc *, int, int); 138 static void rt2560_set_bssid(struct rt2560_softc *, uint8_t *); 139 static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 140 static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 141 static void rt2560_update_promisc(struct rt2560_softc *); 142 static const char *rt2560_get_rf(int); 143 static void rt2560_read_eeprom(struct rt2560_softc *); 144 static int rt2560_bbp_init(struct rt2560_softc *); 145 static void rt2560_set_txantenna(struct rt2560_softc *, int); 146 static void rt2560_set_rxantenna(struct rt2560_softc *, int); 147 static void rt2560_init(void *); 148 static void rt2560_stop(void *); 149 150 /* 151 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 152 */ 153 static const struct ieee80211_rateset rt2560_rateset_11a = 154 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 155 156 static const struct ieee80211_rateset rt2560_rateset_11b = 157 { 4, { 2, 4, 11, 22 } }; 158 159 static const struct ieee80211_rateset rt2560_rateset_11g = 160 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 161 162 static const struct { 163 uint32_t reg; 164 uint32_t val; 165 } rt2560_def_mac[] = { 166 RT2560_DEF_MAC 167 }; 168 169 static const struct { 170 uint8_t reg; 171 uint8_t val; 172 } rt2560_def_bbp[] = { 173 RT2560_DEF_BBP 174 }; 175 176 static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 177 static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 178 static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 179 static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 180 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 181 static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 182 static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 183 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 184 185 static const struct { 186 uint8_t chan; 187 uint32_t r1, r2, r4; 188 } rt2560_rf5222[] = { 189 RT2560_RF5222 190 }; 191 192 int 193 rt2560_attach(device_t dev, int id) 194 { 195 struct rt2560_softc *sc = device_get_softc(dev); 196 struct ieee80211com *ic = &sc->sc_ic; 197 struct ifnet *ifp; 198 int error, i; 199 200 sc->sc_dev = dev; 201 202 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 203 MTX_DEF | MTX_RECURSE); 204 205 callout_init(&sc->scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 206 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 207 208 /* retrieve RT2560 rev. no */ 209 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 210 211 /* retrieve MAC address */ 212 rt2560_get_macaddr(sc, ic->ic_myaddr); 213 214 /* retrieve RF rev. no and various other things from EEPROM */ 215 rt2560_read_eeprom(sc); 216 217 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 218 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 219 220 /* 221 * Allocate Tx and Rx rings. 222 */ 223 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 224 if (error != 0) { 225 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 226 goto fail1; 227 } 228 229 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 230 if (error != 0) { 231 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 232 goto fail2; 233 } 234 235 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 236 if (error != 0) { 237 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 238 goto fail3; 239 } 240 241 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 242 if (error != 0) { 243 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 244 goto fail4; 245 } 246 247 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 248 if (error != 0) { 249 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 250 goto fail5; 251 } 252 253 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 254 if (ifp == NULL) { 255 device_printf(sc->sc_dev, "can not if_alloc()\n"); 256 goto fail6; 257 } 258 259 ifp->if_softc = sc; 260 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 261 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 262 ifp->if_init = rt2560_init; 263 ifp->if_ioctl = rt2560_ioctl; 264 ifp->if_start = rt2560_start; 265 ifp->if_watchdog = rt2560_watchdog; 266 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 267 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 268 IFQ_SET_READY(&ifp->if_snd); 269 270 ic->ic_ifp = ifp; 271 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 272 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 273 ic->ic_state = IEEE80211_S_INIT; 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_WPA; /* 802.11i */ 284 285 if (sc->rf_rev == RT2560_RF_5222) { 286 /* set supported .11a rates */ 287 ic->ic_sup_rates[IEEE80211_MODE_11A] = rt2560_rateset_11a; 288 289 /* set supported .11a channels */ 290 for (i = 36; i <= 64; i += 4) { 291 ic->ic_channels[i].ic_freq = 292 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 293 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 294 } 295 for (i = 100; i <= 140; i += 4) { 296 ic->ic_channels[i].ic_freq = 297 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 298 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 299 } 300 for (i = 149; i <= 161; i += 4) { 301 ic->ic_channels[i].ic_freq = 302 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 303 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 304 } 305 } 306 307 /* set supported .11b and .11g rates */ 308 ic->ic_sup_rates[IEEE80211_MODE_11B] = rt2560_rateset_11b; 309 ic->ic_sup_rates[IEEE80211_MODE_11G] = rt2560_rateset_11g; 310 311 /* set supported .11b and .11g channels (1 through 14) */ 312 for (i = 1; i <= 14; i++) { 313 ic->ic_channels[i].ic_freq = 314 ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ); 315 ic->ic_channels[i].ic_flags = 316 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 317 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 318 } 319 320 ieee80211_ifattach(ic); 321 ic->ic_node_alloc = rt2560_node_alloc; 322 ic->ic_updateslot = rt2560_update_slot; 323 ic->ic_reset = rt2560_reset; 324 /* enable s/w bmiss handling in sta mode */ 325 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 326 327 /* override state transition machine */ 328 sc->sc_newstate = ic->ic_newstate; 329 ic->ic_newstate = rt2560_newstate; 330 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 331 332 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 333 sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf); 334 335 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 336 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 337 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 338 339 sc->sc_txtap_len = sizeof sc->sc_txtapu; 340 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 341 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 342 343 /* 344 * Add a few sysctl knobs. 345 */ 346 sc->dwelltime = 200; 347 348 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 349 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 350 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 351 352 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 353 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 354 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 355 356 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 357 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 358 CTLFLAG_RW, &sc->dwelltime, 0, 359 "channel dwell time (ms) for AP/station scanning"); 360 361 if (bootverbose) 362 ieee80211_announce(ic); 363 364 return 0; 365 366 fail6: rt2560_free_rx_ring(sc, &sc->rxq); 367 fail5: rt2560_free_tx_ring(sc, &sc->bcnq); 368 fail4: rt2560_free_tx_ring(sc, &sc->prioq); 369 fail3: rt2560_free_tx_ring(sc, &sc->atimq); 370 fail2: rt2560_free_tx_ring(sc, &sc->txq); 371 fail1: mtx_destroy(&sc->sc_mtx); 372 373 return ENXIO; 374 } 375 376 int 377 rt2560_detach(void *xsc) 378 { 379 struct rt2560_softc *sc = xsc; 380 struct ieee80211com *ic = &sc->sc_ic; 381 struct ifnet *ifp = ic->ic_ifp; 382 383 rt2560_stop(sc); 384 callout_stop(&sc->scan_ch); 385 callout_stop(&sc->rssadapt_ch); 386 387 bpfdetach(ifp); 388 ieee80211_ifdetach(ic); 389 390 rt2560_free_tx_ring(sc, &sc->txq); 391 rt2560_free_tx_ring(sc, &sc->atimq); 392 rt2560_free_tx_ring(sc, &sc->prioq); 393 rt2560_free_tx_ring(sc, &sc->bcnq); 394 rt2560_free_rx_ring(sc, &sc->rxq); 395 396 if_free(ifp); 397 398 mtx_destroy(&sc->sc_mtx); 399 400 return 0; 401 } 402 403 void 404 rt2560_shutdown(void *xsc) 405 { 406 struct rt2560_softc *sc = xsc; 407 408 rt2560_stop(sc); 409 } 410 411 void 412 rt2560_suspend(void *xsc) 413 { 414 struct rt2560_softc *sc = xsc; 415 416 rt2560_stop(sc); 417 } 418 419 void 420 rt2560_resume(void *xsc) 421 { 422 struct rt2560_softc *sc = xsc; 423 struct ifnet *ifp = sc->sc_ic.ic_ifp; 424 425 if (ifp->if_flags & IFF_UP) { 426 ifp->if_init(ifp->if_softc); 427 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 428 ifp->if_start(ifp); 429 } 430 } 431 432 static void 433 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 434 { 435 if (error != 0) 436 return; 437 438 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 439 440 *(bus_addr_t *)arg = segs[0].ds_addr; 441 } 442 443 static int 444 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 445 int count) 446 { 447 int i, error; 448 449 ring->count = count; 450 ring->queued = 0; 451 ring->cur = ring->next = 0; 452 ring->cur_encrypt = ring->next_encrypt = 0; 453 454 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 455 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_TX_DESC_SIZE, 1, 456 count * RT2560_TX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 457 if (error != 0) { 458 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 459 goto fail; 460 } 461 462 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 463 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 464 if (error != 0) { 465 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 466 goto fail; 467 } 468 469 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 470 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 471 0); 472 if (error != 0) { 473 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 474 goto fail; 475 } 476 477 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 478 M_NOWAIT | M_ZERO); 479 if (ring->data == NULL) { 480 device_printf(sc->sc_dev, "could not allocate soft data\n"); 481 error = ENOMEM; 482 goto fail; 483 } 484 485 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 486 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2560_MAX_SCATTER, 487 MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 488 if (error != 0) { 489 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 490 goto fail; 491 } 492 493 for (i = 0; i < count; i++) { 494 error = bus_dmamap_create(ring->data_dmat, 0, 495 &ring->data[i].map); 496 if (error != 0) { 497 device_printf(sc->sc_dev, "could not create DMA map\n"); 498 goto fail; 499 } 500 } 501 502 return 0; 503 504 fail: rt2560_free_tx_ring(sc, ring); 505 return error; 506 } 507 508 static void 509 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 510 { 511 struct rt2560_tx_desc *desc; 512 struct rt2560_tx_data *data; 513 int i; 514 515 for (i = 0; i < ring->count; i++) { 516 desc = &ring->desc[i]; 517 data = &ring->data[i]; 518 519 if (data->m != NULL) { 520 bus_dmamap_sync(ring->data_dmat, data->map, 521 BUS_DMASYNC_POSTWRITE); 522 bus_dmamap_unload(ring->data_dmat, data->map); 523 m_freem(data->m); 524 data->m = NULL; 525 } 526 527 if (data->ni != NULL) { 528 ieee80211_free_node(data->ni); 529 data->ni = NULL; 530 } 531 532 desc->flags = 0; 533 } 534 535 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 536 537 ring->queued = 0; 538 ring->cur = ring->next = 0; 539 ring->cur_encrypt = ring->next_encrypt = 0; 540 } 541 542 static void 543 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 544 { 545 struct rt2560_tx_data *data; 546 int i; 547 548 if (ring->desc != NULL) { 549 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 550 BUS_DMASYNC_POSTWRITE); 551 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 552 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 553 } 554 555 if (ring->desc_dmat != NULL) 556 bus_dma_tag_destroy(ring->desc_dmat); 557 558 if (ring->data != NULL) { 559 for (i = 0; i < ring->count; i++) { 560 data = &ring->data[i]; 561 562 if (data->m != NULL) { 563 bus_dmamap_sync(ring->data_dmat, data->map, 564 BUS_DMASYNC_POSTWRITE); 565 bus_dmamap_unload(ring->data_dmat, data->map); 566 m_freem(data->m); 567 } 568 569 if (data->ni != NULL) 570 ieee80211_free_node(data->ni); 571 572 if (data->map != NULL) 573 bus_dmamap_destroy(ring->data_dmat, data->map); 574 } 575 576 free(ring->data, M_DEVBUF); 577 } 578 579 if (ring->data_dmat != NULL) 580 bus_dma_tag_destroy(ring->data_dmat); 581 } 582 583 static int 584 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 585 int count) 586 { 587 struct rt2560_rx_desc *desc; 588 struct rt2560_rx_data *data; 589 bus_addr_t physaddr; 590 int i, error; 591 592 ring->count = count; 593 ring->cur = ring->next = 0; 594 ring->cur_decrypt = 0; 595 596 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 597 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_RX_DESC_SIZE, 1, 598 count * RT2560_RX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 599 if (error != 0) { 600 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 601 goto fail; 602 } 603 604 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 605 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 606 if (error != 0) { 607 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 608 goto fail; 609 } 610 611 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 612 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 613 0); 614 if (error != 0) { 615 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 616 goto fail; 617 } 618 619 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 620 M_NOWAIT | M_ZERO); 621 if (ring->data == NULL) { 622 device_printf(sc->sc_dev, "could not allocate soft data\n"); 623 error = ENOMEM; 624 goto fail; 625 } 626 627 /* 628 * Pre-allocate Rx buffers and populate Rx ring. 629 */ 630 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 631 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, NULL, 632 NULL, &ring->data_dmat); 633 if (error != 0) { 634 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 635 goto fail; 636 } 637 638 for (i = 0; i < count; i++) { 639 desc = &sc->rxq.desc[i]; 640 data = &sc->rxq.data[i]; 641 642 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 643 if (error != 0) { 644 device_printf(sc->sc_dev, "could not create DMA map\n"); 645 goto fail; 646 } 647 648 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 649 if (data->m == NULL) { 650 device_printf(sc->sc_dev, 651 "could not allocate rx mbuf\n"); 652 error = ENOMEM; 653 goto fail; 654 } 655 656 error = bus_dmamap_load(ring->data_dmat, data->map, 657 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 658 &physaddr, 0); 659 if (error != 0) { 660 device_printf(sc->sc_dev, 661 "could not load rx buf DMA map"); 662 goto fail; 663 } 664 665 desc->flags = htole32(RT2560_RX_BUSY); 666 desc->physaddr = htole32(physaddr); 667 } 668 669 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 670 671 return 0; 672 673 fail: rt2560_free_rx_ring(sc, ring); 674 return error; 675 } 676 677 static void 678 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 679 { 680 int i; 681 682 for (i = 0; i < ring->count; i++) { 683 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 684 ring->data[i].drop = 0; 685 } 686 687 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 688 689 ring->cur = ring->next = 0; 690 ring->cur_decrypt = 0; 691 } 692 693 static void 694 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 695 { 696 struct rt2560_rx_data *data; 697 int i; 698 699 if (ring->desc != NULL) { 700 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 701 BUS_DMASYNC_POSTWRITE); 702 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 703 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 704 } 705 706 if (ring->desc_dmat != NULL) 707 bus_dma_tag_destroy(ring->desc_dmat); 708 709 if (ring->data != NULL) { 710 for (i = 0; i < ring->count; i++) { 711 data = &ring->data[i]; 712 713 if (data->m != NULL) { 714 bus_dmamap_sync(ring->data_dmat, data->map, 715 BUS_DMASYNC_POSTREAD); 716 bus_dmamap_unload(ring->data_dmat, data->map); 717 m_freem(data->m); 718 } 719 720 if (data->map != NULL) 721 bus_dmamap_destroy(ring->data_dmat, data->map); 722 } 723 724 free(ring->data, M_DEVBUF); 725 } 726 727 if (ring->data_dmat != NULL) 728 bus_dma_tag_destroy(ring->data_dmat); 729 } 730 731 static struct ieee80211_node * 732 rt2560_node_alloc(struct ieee80211_node_table *nt) 733 { 734 struct rt2560_node *rn; 735 736 rn = malloc(sizeof (struct rt2560_node), M_80211_NODE, 737 M_NOWAIT | M_ZERO); 738 739 return (rn != NULL) ? &rn->ni : NULL; 740 } 741 742 static int 743 rt2560_media_change(struct ifnet *ifp) 744 { 745 struct rt2560_softc *sc = ifp->if_softc; 746 int error; 747 748 error = ieee80211_media_change(ifp); 749 if (error != ENETRESET) 750 return error; 751 752 if ((ifp->if_flags & IFF_UP) && 753 (ifp->if_drv_flags & IFF_DRV_RUNNING)) 754 rt2560_init(sc); 755 756 return 0; 757 } 758 759 /* 760 * This function is called periodically (every 200ms) during scanning to 761 * switch from one channel to another. 762 */ 763 static void 764 rt2560_next_scan(void *arg) 765 { 766 struct rt2560_softc *sc = arg; 767 struct ieee80211com *ic = &sc->sc_ic; 768 769 if (ic->ic_state == IEEE80211_S_SCAN) 770 ieee80211_next_scan(ic); 771 } 772 773 /* 774 * This function is called for each node present in the node station table. 775 */ 776 static void 777 rt2560_iter_func(void *arg, struct ieee80211_node *ni) 778 { 779 struct rt2560_node *rn = (struct rt2560_node *)ni; 780 781 ral_rssadapt_updatestats(&rn->rssadapt); 782 } 783 784 /* 785 * This function is called periodically (every 100ms) in RUN state to update 786 * the rate adaptation statistics. 787 */ 788 static void 789 rt2560_update_rssadapt(void *arg) 790 { 791 struct rt2560_softc *sc = arg; 792 struct ieee80211com *ic = &sc->sc_ic; 793 794 RAL_LOCK(sc); 795 796 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 797 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 798 799 RAL_UNLOCK(sc); 800 } 801 802 static int 803 rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 804 { 805 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 806 enum ieee80211_state ostate; 807 struct ieee80211_node *ni; 808 struct mbuf *m; 809 int error = 0; 810 811 ostate = ic->ic_state; 812 callout_stop(&sc->scan_ch); 813 814 switch (nstate) { 815 case IEEE80211_S_INIT: 816 callout_stop(&sc->rssadapt_ch); 817 818 if (ostate == IEEE80211_S_RUN) { 819 /* abort TSF synchronization */ 820 RAL_WRITE(sc, RT2560_CSR14, 0); 821 822 /* turn association led off */ 823 rt2560_update_led(sc, 0, 0); 824 } 825 break; 826 827 case IEEE80211_S_SCAN: 828 rt2560_set_chan(sc, ic->ic_curchan); 829 callout_reset(&sc->scan_ch, (sc->dwelltime * hz) / 1000, 830 rt2560_next_scan, sc); 831 break; 832 833 case IEEE80211_S_AUTH: 834 rt2560_set_chan(sc, ic->ic_curchan); 835 break; 836 837 case IEEE80211_S_ASSOC: 838 rt2560_set_chan(sc, ic->ic_curchan); 839 break; 840 841 case IEEE80211_S_RUN: 842 rt2560_set_chan(sc, ic->ic_curchan); 843 844 ni = ic->ic_bss; 845 846 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 847 rt2560_update_plcp(sc); 848 rt2560_set_basicrates(sc); 849 rt2560_set_bssid(sc, ni->ni_bssid); 850 } 851 852 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 853 ic->ic_opmode == IEEE80211_M_IBSS) { 854 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 855 if (m == NULL) { 856 device_printf(sc->sc_dev, 857 "could not allocate beacon\n"); 858 error = ENOBUFS; 859 break; 860 } 861 862 ieee80211_ref_node(ni); 863 error = rt2560_tx_bcn(sc, m, ni); 864 if (error != 0) 865 break; 866 } 867 868 /* turn assocation led on */ 869 rt2560_update_led(sc, 1, 0); 870 871 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 872 callout_reset(&sc->rssadapt_ch, hz / 10, 873 rt2560_update_rssadapt, sc); 874 875 rt2560_enable_tsf_sync(sc); 876 } 877 break; 878 } 879 880 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 881 } 882 883 /* 884 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 885 * 93C66). 886 */ 887 static uint16_t 888 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 889 { 890 uint32_t tmp; 891 uint16_t val; 892 int n; 893 894 /* clock C once before the first command */ 895 RT2560_EEPROM_CTL(sc, 0); 896 897 RT2560_EEPROM_CTL(sc, RT2560_S); 898 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 899 RT2560_EEPROM_CTL(sc, RT2560_S); 900 901 /* write start bit (1) */ 902 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 903 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 904 905 /* write READ opcode (10) */ 906 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 907 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 908 RT2560_EEPROM_CTL(sc, RT2560_S); 909 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 910 911 /* write address (A5-A0 or A7-A0) */ 912 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 913 for (; n >= 0; n--) { 914 RT2560_EEPROM_CTL(sc, RT2560_S | 915 (((addr >> n) & 1) << RT2560_SHIFT_D)); 916 RT2560_EEPROM_CTL(sc, RT2560_S | 917 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 918 } 919 920 RT2560_EEPROM_CTL(sc, RT2560_S); 921 922 /* read data Q15-Q0 */ 923 val = 0; 924 for (n = 15; n >= 0; n--) { 925 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 926 tmp = RAL_READ(sc, RT2560_CSR21); 927 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 928 RT2560_EEPROM_CTL(sc, RT2560_S); 929 } 930 931 RT2560_EEPROM_CTL(sc, 0); 932 933 /* clear Chip Select and clock C */ 934 RT2560_EEPROM_CTL(sc, RT2560_S); 935 RT2560_EEPROM_CTL(sc, 0); 936 RT2560_EEPROM_CTL(sc, RT2560_C); 937 938 return val; 939 } 940 941 /* 942 * Some frames were processed by the hardware cipher engine and are ready for 943 * transmission. 944 */ 945 static void 946 rt2560_encryption_intr(struct rt2560_softc *sc) 947 { 948 struct rt2560_tx_desc *desc; 949 int hw; 950 951 /* retrieve last descriptor index processed by cipher engine */ 952 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 953 hw /= RT2560_TX_DESC_SIZE; 954 955 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 956 BUS_DMASYNC_POSTREAD); 957 958 for (; sc->txq.next_encrypt != hw;) { 959 desc = &sc->txq.desc[sc->txq.next_encrypt]; 960 961 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 962 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 963 break; 964 965 /* for TKIP, swap eiv field to fix a bug in ASIC */ 966 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 967 RT2560_TX_CIPHER_TKIP) 968 desc->eiv = bswap32(desc->eiv); 969 970 /* mark the frame ready for transmission */ 971 desc->flags |= htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 972 973 DPRINTFN(15, ("encryption done idx=%u\n", 974 sc->txq.next_encrypt)); 975 976 sc->txq.next_encrypt = 977 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 978 } 979 980 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 981 BUS_DMASYNC_PREWRITE); 982 983 /* kick Tx */ 984 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 985 } 986 987 static void 988 rt2560_tx_intr(struct rt2560_softc *sc) 989 { 990 struct ieee80211com *ic = &sc->sc_ic; 991 struct ifnet *ifp = ic->ic_ifp; 992 struct rt2560_tx_desc *desc; 993 struct rt2560_tx_data *data; 994 struct rt2560_node *rn; 995 996 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 997 BUS_DMASYNC_POSTREAD); 998 999 for (;;) { 1000 desc = &sc->txq.desc[sc->txq.next]; 1001 data = &sc->txq.data[sc->txq.next]; 1002 1003 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1004 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 1005 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1006 break; 1007 1008 rn = (struct rt2560_node *)data->ni; 1009 1010 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1011 case RT2560_TX_SUCCESS: 1012 DPRINTFN(10, ("data frame sent successfully\n")); 1013 if (data->id.id_node != NULL) { 1014 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 1015 &data->id); 1016 } 1017 ifp->if_opackets++; 1018 break; 1019 1020 case RT2560_TX_SUCCESS_RETRY: 1021 DPRINTFN(9, ("data frame sent after %u retries\n", 1022 (le32toh(desc->flags) >> 5) & 0x7)); 1023 ifp->if_opackets++; 1024 break; 1025 1026 case RT2560_TX_FAIL_RETRY: 1027 DPRINTFN(9, ("sending data frame failed (too much " 1028 "retries)\n")); 1029 if (data->id.id_node != NULL) { 1030 ral_rssadapt_lower_rate(ic, data->ni, 1031 &rn->rssadapt, &data->id); 1032 } 1033 ifp->if_oerrors++; 1034 break; 1035 1036 case RT2560_TX_FAIL_INVALID: 1037 case RT2560_TX_FAIL_OTHER: 1038 default: 1039 device_printf(sc->sc_dev, "sending data frame failed " 1040 "0x%08x\n", le32toh(desc->flags)); 1041 ifp->if_oerrors++; 1042 } 1043 1044 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1045 BUS_DMASYNC_POSTWRITE); 1046 bus_dmamap_unload(sc->txq.data_dmat, data->map); 1047 m_freem(data->m); 1048 data->m = NULL; 1049 ieee80211_free_node(data->ni); 1050 data->ni = NULL; 1051 1052 /* descriptor is no longer valid */ 1053 desc->flags &= ~htole32(RT2560_TX_VALID); 1054 1055 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 1056 1057 sc->txq.queued--; 1058 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 1059 } 1060 1061 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1062 BUS_DMASYNC_PREWRITE); 1063 1064 sc->sc_tx_timer = 0; 1065 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1066 rt2560_start(ifp); 1067 } 1068 1069 static void 1070 rt2560_prio_intr(struct rt2560_softc *sc) 1071 { 1072 struct ieee80211com *ic = &sc->sc_ic; 1073 struct ifnet *ifp = ic->ic_ifp; 1074 struct rt2560_tx_desc *desc; 1075 struct rt2560_tx_data *data; 1076 1077 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1078 BUS_DMASYNC_POSTREAD); 1079 1080 for (;;) { 1081 desc = &sc->prioq.desc[sc->prioq.next]; 1082 data = &sc->prioq.data[sc->prioq.next]; 1083 1084 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1085 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1086 break; 1087 1088 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1089 case RT2560_TX_SUCCESS: 1090 DPRINTFN(10, ("mgt frame sent successfully\n")); 1091 break; 1092 1093 case RT2560_TX_SUCCESS_RETRY: 1094 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1095 (le32toh(desc->flags) >> 5) & 0x7)); 1096 break; 1097 1098 case RT2560_TX_FAIL_RETRY: 1099 DPRINTFN(9, ("sending mgt frame failed (too much " 1100 "retries)\n")); 1101 break; 1102 1103 case RT2560_TX_FAIL_INVALID: 1104 case RT2560_TX_FAIL_OTHER: 1105 default: 1106 device_printf(sc->sc_dev, "sending mgt frame failed " 1107 "0x%08x\n", le32toh(desc->flags)); 1108 } 1109 1110 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1111 BUS_DMASYNC_POSTWRITE); 1112 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1113 m_freem(data->m); 1114 data->m = NULL; 1115 ieee80211_free_node(data->ni); 1116 data->ni = NULL; 1117 1118 /* descriptor is no longer valid */ 1119 desc->flags &= ~htole32(RT2560_TX_VALID); 1120 1121 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1122 1123 sc->prioq.queued--; 1124 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1125 } 1126 1127 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1128 BUS_DMASYNC_PREWRITE); 1129 1130 sc->sc_tx_timer = 0; 1131 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1132 rt2560_start(ifp); 1133 } 1134 1135 /* 1136 * Some frames were processed by the hardware cipher engine and are ready for 1137 * transmission to the IEEE802.11 layer. 1138 */ 1139 static void 1140 rt2560_decryption_intr(struct rt2560_softc *sc) 1141 { 1142 struct ieee80211com *ic = &sc->sc_ic; 1143 struct ifnet *ifp = ic->ic_ifp; 1144 struct rt2560_rx_desc *desc; 1145 struct rt2560_rx_data *data; 1146 bus_addr_t physaddr; 1147 struct ieee80211_frame *wh; 1148 struct ieee80211_node *ni; 1149 struct rt2560_node *rn; 1150 struct mbuf *mnew, *m; 1151 int hw, error; 1152 1153 /* retrieve last decriptor index processed by cipher engine */ 1154 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1155 hw /= RT2560_RX_DESC_SIZE; 1156 1157 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1158 BUS_DMASYNC_POSTREAD); 1159 1160 for (; sc->rxq.cur_decrypt != hw;) { 1161 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1162 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1163 1164 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1165 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1166 break; 1167 1168 if (data->drop) { 1169 ifp->if_ierrors++; 1170 goto skip; 1171 } 1172 1173 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1174 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1175 ifp->if_ierrors++; 1176 goto skip; 1177 } 1178 1179 /* 1180 * Try to allocate a new mbuf for this ring element and load it 1181 * before processing the current mbuf. If the ring element 1182 * cannot be loaded, drop the received packet and reuse the old 1183 * mbuf. In the unlikely case that the old mbuf can't be 1184 * reloaded either, explicitly panic. 1185 */ 1186 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1187 if (mnew == NULL) { 1188 ifp->if_ierrors++; 1189 goto skip; 1190 } 1191 1192 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1193 BUS_DMASYNC_POSTREAD); 1194 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1195 1196 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1197 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1198 &physaddr, 0); 1199 if (error != 0) { 1200 m_freem(mnew); 1201 1202 /* try to reload the old mbuf */ 1203 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1204 mtod(data->m, void *), MCLBYTES, 1205 rt2560_dma_map_addr, &physaddr, 0); 1206 if (error != 0) { 1207 /* very unlikely that it will fail... */ 1208 panic("%s: could not load old rx mbuf", 1209 device_get_name(sc->sc_dev)); 1210 } 1211 ifp->if_ierrors++; 1212 goto skip; 1213 } 1214 1215 /* 1216 * New mbuf successfully loaded, update Rx ring and continue 1217 * processing. 1218 */ 1219 m = data->m; 1220 data->m = mnew; 1221 desc->physaddr = htole32(physaddr); 1222 1223 /* finalize mbuf */ 1224 m->m_pkthdr.rcvif = ifp; 1225 m->m_pkthdr.len = m->m_len = 1226 (le32toh(desc->flags) >> 16) & 0xfff; 1227 1228 if (bpf_peers_present(sc->sc_drvbpf)) { 1229 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1230 uint32_t tsf_lo, tsf_hi; 1231 1232 /* get timestamp (low and high 32 bits) */ 1233 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1234 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1235 1236 tap->wr_tsf = 1237 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1238 tap->wr_flags = 0; 1239 tap->wr_rate = rt2560_rxrate(desc); 1240 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1241 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1242 tap->wr_antenna = sc->rx_ant; 1243 tap->wr_antsignal = desc->rssi; 1244 1245 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1246 } 1247 1248 wh = mtod(m, struct ieee80211_frame *); 1249 ni = ieee80211_find_rxnode(ic, 1250 (struct ieee80211_frame_min *)wh); 1251 1252 /* send the frame to the 802.11 layer */ 1253 ieee80211_input(ic, m, ni, desc->rssi, 0); 1254 1255 /* give rssi to the rate adatation algorithm */ 1256 rn = (struct rt2560_node *)ni; 1257 ral_rssadapt_input(ic, ni, &rn->rssadapt, desc->rssi); 1258 1259 /* node is no longer needed */ 1260 ieee80211_free_node(ni); 1261 1262 skip: desc->flags = htole32(RT2560_RX_BUSY); 1263 1264 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1265 1266 sc->rxq.cur_decrypt = 1267 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT; 1268 } 1269 1270 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1271 BUS_DMASYNC_PREWRITE); 1272 } 1273 1274 /* 1275 * Some frames were received. Pass them to the hardware cipher engine before 1276 * sending them to the 802.11 layer. 1277 */ 1278 static void 1279 rt2560_rx_intr(struct rt2560_softc *sc) 1280 { 1281 struct rt2560_rx_desc *desc; 1282 struct rt2560_rx_data *data; 1283 1284 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1285 BUS_DMASYNC_POSTREAD); 1286 1287 for (;;) { 1288 desc = &sc->rxq.desc[sc->rxq.cur]; 1289 data = &sc->rxq.data[sc->rxq.cur]; 1290 1291 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1292 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1293 break; 1294 1295 data->drop = 0; 1296 1297 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1298 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1299 /* 1300 * This should not happen since we did not request 1301 * to receive those frames when we filled RXCSR0. 1302 */ 1303 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1304 le32toh(desc->flags))); 1305 data->drop = 1; 1306 } 1307 1308 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1309 DPRINTFN(5, ("bad length\n")); 1310 data->drop = 1; 1311 } 1312 1313 /* mark the frame for decryption */ 1314 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1315 1316 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1317 1318 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1319 } 1320 1321 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1322 BUS_DMASYNC_PREWRITE); 1323 1324 /* kick decrypt */ 1325 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1326 } 1327 1328 /* 1329 * This function is called periodically in IBSS mode when a new beacon must be 1330 * sent out. 1331 */ 1332 static void 1333 rt2560_beacon_expire(struct rt2560_softc *sc) 1334 { 1335 struct ieee80211com *ic = &sc->sc_ic; 1336 struct rt2560_tx_data *data; 1337 1338 if (ic->ic_opmode != IEEE80211_M_IBSS && 1339 ic->ic_opmode != IEEE80211_M_HOSTAP) 1340 return; 1341 1342 data = &sc->bcnq.data[sc->bcnq.next]; 1343 1344 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1345 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1346 1347 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1348 1349 if (bpf_peers_present(ic->ic_rawbpf)) 1350 bpf_mtap(ic->ic_rawbpf, data->m); 1351 1352 rt2560_tx_bcn(sc, data->m, data->ni); 1353 1354 DPRINTFN(15, ("beacon expired\n")); 1355 1356 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1357 } 1358 1359 /* ARGSUSED */ 1360 static void 1361 rt2560_wakeup_expire(struct rt2560_softc *sc) 1362 { 1363 DPRINTFN(2, ("wakeup expired\n")); 1364 } 1365 1366 void 1367 rt2560_intr(void *arg) 1368 { 1369 struct rt2560_softc *sc = arg; 1370 struct ifnet *ifp = sc->sc_ifp; 1371 uint32_t r; 1372 1373 RAL_LOCK(sc); 1374 1375 /* disable interrupts */ 1376 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1377 1378 /* don't re-enable interrupts if we're shutting down */ 1379 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1380 RAL_UNLOCK(sc); 1381 return; 1382 } 1383 1384 r = RAL_READ(sc, RT2560_CSR7); 1385 RAL_WRITE(sc, RT2560_CSR7, r); 1386 1387 if (r & RT2560_BEACON_EXPIRE) 1388 rt2560_beacon_expire(sc); 1389 1390 if (r & RT2560_WAKEUP_EXPIRE) 1391 rt2560_wakeup_expire(sc); 1392 1393 if (r & RT2560_ENCRYPTION_DONE) 1394 rt2560_encryption_intr(sc); 1395 1396 if (r & RT2560_TX_DONE) 1397 rt2560_tx_intr(sc); 1398 1399 if (r & RT2560_PRIO_DONE) 1400 rt2560_prio_intr(sc); 1401 1402 if (r & RT2560_DECRYPTION_DONE) 1403 rt2560_decryption_intr(sc); 1404 1405 if (r & RT2560_RX_DONE) 1406 rt2560_rx_intr(sc); 1407 1408 /* re-enable interrupts */ 1409 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1410 1411 RAL_UNLOCK(sc); 1412 } 1413 1414 /* quickly determine if a given rate is CCK or OFDM */ 1415 #define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1416 1417 #define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1418 #define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1419 1420 #define RAL_SIFS 10 /* us */ 1421 1422 #define RT2560_TXRX_TURNAROUND 10 /* us */ 1423 1424 /* 1425 * This function is only used by the Rx radiotap code. 1426 */ 1427 static uint8_t 1428 rt2560_rxrate(struct rt2560_rx_desc *desc) 1429 { 1430 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1431 /* reverse function of rt2560_plcp_signal */ 1432 switch (desc->rate) { 1433 case 0xb: return 12; 1434 case 0xf: return 18; 1435 case 0xa: return 24; 1436 case 0xe: return 36; 1437 case 0x9: return 48; 1438 case 0xd: return 72; 1439 case 0x8: return 96; 1440 case 0xc: return 108; 1441 } 1442 } else { 1443 if (desc->rate == 10) 1444 return 2; 1445 if (desc->rate == 20) 1446 return 4; 1447 if (desc->rate == 55) 1448 return 11; 1449 if (desc->rate == 110) 1450 return 22; 1451 } 1452 return 2; /* should not get there */ 1453 } 1454 1455 /* 1456 * Return the expected ack rate for a frame transmitted at rate `rate'. 1457 * XXX: this should depend on the destination node basic rate set. 1458 */ 1459 static int 1460 rt2560_ack_rate(struct ieee80211com *ic, int rate) 1461 { 1462 switch (rate) { 1463 /* CCK rates */ 1464 case 2: 1465 return 2; 1466 case 4: 1467 case 11: 1468 case 22: 1469 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1470 1471 /* OFDM rates */ 1472 case 12: 1473 case 18: 1474 return 12; 1475 case 24: 1476 case 36: 1477 return 24; 1478 case 48: 1479 case 72: 1480 case 96: 1481 case 108: 1482 return 48; 1483 } 1484 1485 /* default to 1Mbps */ 1486 return 2; 1487 } 1488 1489 /* 1490 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1491 * The function automatically determines the operating mode depending on the 1492 * given rate. `flags' indicates whether short preamble is in use or not. 1493 */ 1494 static uint16_t 1495 rt2560_txtime(int len, int rate, uint32_t flags) 1496 { 1497 uint16_t txtime; 1498 1499 if (RAL_RATE_IS_OFDM(rate)) { 1500 /* IEEE Std 802.11a-1999, pp. 37 */ 1501 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1502 txtime = 16 + 4 + 4 * txtime + 6; 1503 } else { 1504 /* IEEE Std 802.11b-1999, pp. 28 */ 1505 txtime = (16 * len + rate - 1) / rate; 1506 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1507 txtime += 72 + 24; 1508 else 1509 txtime += 144 + 48; 1510 } 1511 1512 return txtime; 1513 } 1514 1515 static uint8_t 1516 rt2560_plcp_signal(int rate) 1517 { 1518 switch (rate) { 1519 /* CCK rates (returned values are device-dependent) */ 1520 case 2: return 0x0; 1521 case 4: return 0x1; 1522 case 11: return 0x2; 1523 case 22: return 0x3; 1524 1525 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1526 case 12: return 0xb; 1527 case 18: return 0xf; 1528 case 24: return 0xa; 1529 case 36: return 0xe; 1530 case 48: return 0x9; 1531 case 72: return 0xd; 1532 case 96: return 0x8; 1533 case 108: return 0xc; 1534 1535 /* unsupported rates (should not get there) */ 1536 default: return 0xff; 1537 } 1538 } 1539 1540 static void 1541 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1542 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1543 { 1544 struct ieee80211com *ic = &sc->sc_ic; 1545 uint16_t plcp_length; 1546 int remainder; 1547 1548 desc->flags = htole32(flags); 1549 desc->flags |= htole32(len << 16); 1550 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) : 1551 htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 1552 1553 desc->physaddr = htole32(physaddr); 1554 desc->wme = htole16( 1555 RT2560_AIFSN(2) | 1556 RT2560_LOGCWMIN(3) | 1557 RT2560_LOGCWMAX(8)); 1558 1559 /* setup PLCP fields */ 1560 desc->plcp_signal = rt2560_plcp_signal(rate); 1561 desc->plcp_service = 4; 1562 1563 len += IEEE80211_CRC_LEN; 1564 if (RAL_RATE_IS_OFDM(rate)) { 1565 desc->flags |= htole32(RT2560_TX_OFDM); 1566 1567 plcp_length = len & 0xfff; 1568 desc->plcp_length_hi = plcp_length >> 6; 1569 desc->plcp_length_lo = plcp_length & 0x3f; 1570 } else { 1571 plcp_length = (16 * len + rate - 1) / rate; 1572 if (rate == 22) { 1573 remainder = (16 * len) % 22; 1574 if (remainder != 0 && remainder < 7) 1575 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1576 } 1577 desc->plcp_length_hi = plcp_length >> 8; 1578 desc->plcp_length_lo = plcp_length & 0xff; 1579 1580 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1581 desc->plcp_signal |= 0x08; 1582 } 1583 } 1584 1585 static int 1586 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1587 struct ieee80211_node *ni) 1588 { 1589 struct ieee80211com *ic = &sc->sc_ic; 1590 struct rt2560_tx_desc *desc; 1591 struct rt2560_tx_data *data; 1592 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1593 int nsegs, rate, error; 1594 1595 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1596 data = &sc->bcnq.data[sc->bcnq.cur]; 1597 1598 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1599 1600 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0, 1601 segs, &nsegs, BUS_DMA_NOWAIT); 1602 if (error != 0) { 1603 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1604 error); 1605 m_freem(m0); 1606 return error; 1607 } 1608 1609 if (bpf_peers_present(sc->sc_drvbpf)) { 1610 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1611 1612 tap->wt_flags = 0; 1613 tap->wt_rate = rate; 1614 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1615 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1616 tap->wt_antenna = sc->tx_ant; 1617 1618 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1619 } 1620 1621 data->m = m0; 1622 data->ni = ni; 1623 1624 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1625 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr); 1626 1627 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1628 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1629 1630 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1631 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1632 BUS_DMASYNC_PREWRITE); 1633 1634 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1635 1636 return 0; 1637 } 1638 1639 static int 1640 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1641 struct ieee80211_node *ni) 1642 { 1643 struct ieee80211com *ic = &sc->sc_ic; 1644 struct rt2560_tx_desc *desc; 1645 struct rt2560_tx_data *data; 1646 struct ieee80211_frame *wh; 1647 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1648 uint16_t dur; 1649 uint32_t flags = 0; 1650 int nsegs, rate, error; 1651 1652 desc = &sc->prioq.desc[sc->prioq.cur]; 1653 data = &sc->prioq.data[sc->prioq.cur]; 1654 1655 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1656 1657 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1658 segs, &nsegs, 0); 1659 if (error != 0) { 1660 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1661 error); 1662 m_freem(m0); 1663 return error; 1664 } 1665 1666 if (bpf_peers_present(sc->sc_drvbpf)) { 1667 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1668 1669 tap->wt_flags = 0; 1670 tap->wt_rate = rate; 1671 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1672 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1673 tap->wt_antenna = sc->tx_ant; 1674 1675 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1676 } 1677 1678 data->m = m0; 1679 data->ni = ni; 1680 1681 wh = mtod(m0, struct ieee80211_frame *); 1682 1683 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1684 flags |= RT2560_TX_ACK; 1685 1686 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1687 RAL_SIFS; 1688 *(uint16_t *)wh->i_dur = htole16(dur); 1689 1690 /* tell hardware to add timestamp for probe responses */ 1691 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1692 IEEE80211_FC0_TYPE_MGT && 1693 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1694 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1695 flags |= RT2560_TX_TIMESTAMP; 1696 } 1697 1698 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, 1699 segs->ds_addr); 1700 1701 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1702 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1703 BUS_DMASYNC_PREWRITE); 1704 1705 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1706 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1707 1708 /* kick prio */ 1709 sc->prioq.queued++; 1710 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1711 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1712 1713 return 0; 1714 } 1715 1716 /* 1717 * Build a RTS control frame. 1718 */ 1719 static struct mbuf * 1720 rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1721 uint16_t dur) 1722 { 1723 struct ieee80211_frame_rts *rts; 1724 struct mbuf *m; 1725 1726 MGETHDR(m, M_DONTWAIT, MT_DATA); 1727 if (m == NULL) { 1728 sc->sc_ic.ic_stats.is_tx_nobuf++; 1729 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1730 return NULL; 1731 } 1732 1733 rts = mtod(m, struct ieee80211_frame_rts *); 1734 1735 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1736 IEEE80211_FC0_SUBTYPE_RTS; 1737 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1738 *(uint16_t *)rts->i_dur = htole16(dur); 1739 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1740 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1741 1742 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1743 1744 return m; 1745 } 1746 1747 static int 1748 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1749 struct ieee80211_node *ni) 1750 { 1751 struct ieee80211com *ic = &sc->sc_ic; 1752 struct rt2560_tx_desc *desc; 1753 struct rt2560_tx_data *data; 1754 struct rt2560_node *rn; 1755 struct ieee80211_rateset *rs; 1756 struct ieee80211_frame *wh; 1757 struct ieee80211_key *k; 1758 struct mbuf *mnew; 1759 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1760 uint16_t dur; 1761 uint32_t flags = 0; 1762 int nsegs, rate, error; 1763 1764 wh = mtod(m0, struct ieee80211_frame *); 1765 1766 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1767 rs = &ic->ic_sup_rates[ic->ic_curmode]; 1768 rate = rs->rs_rates[ic->ic_fixed_rate]; 1769 } else { 1770 rs = &ni->ni_rates; 1771 rn = (struct rt2560_node *)ni; 1772 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1773 m0->m_pkthdr.len, NULL, 0); 1774 rate = rs->rs_rates[ni->ni_txrate]; 1775 } 1776 rate &= IEEE80211_RATE_VAL; 1777 1778 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1779 k = ieee80211_crypto_encap(ic, ni, m0); 1780 if (k == NULL) { 1781 m_freem(m0); 1782 return ENOBUFS; 1783 } 1784 1785 /* packet header may have moved, reset our local pointer */ 1786 wh = mtod(m0, struct ieee80211_frame *); 1787 } 1788 1789 /* 1790 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1791 * for directed frames only when the length of the MPDU is greater 1792 * than the length threshold indicated by [...]" ic_rtsthreshold. 1793 */ 1794 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1795 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1796 struct mbuf *m; 1797 uint16_t dur; 1798 int rtsrate, ackrate; 1799 1800 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1801 ackrate = rt2560_ack_rate(ic, rate); 1802 1803 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1804 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1805 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1806 3 * RAL_SIFS; 1807 1808 m = rt2560_get_rts(sc, wh, dur); 1809 1810 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1811 data = &sc->txq.data[sc->txq.cur_encrypt]; 1812 1813 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1814 m, segs, &nsegs, 0); 1815 if (error != 0) { 1816 device_printf(sc->sc_dev, 1817 "could not map mbuf (error %d)\n", error); 1818 m_freem(m); 1819 m_freem(m0); 1820 return error; 1821 } 1822 1823 /* avoid multiple free() of the same node for each fragment */ 1824 ieee80211_ref_node(ni); 1825 1826 data->m = m; 1827 data->ni = ni; 1828 1829 /* RTS frames are not taken into account for rssadapt */ 1830 data->id.id_node = NULL; 1831 1832 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1833 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, 1834 segs->ds_addr); 1835 1836 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1837 BUS_DMASYNC_PREWRITE); 1838 1839 sc->txq.queued++; 1840 sc->txq.cur_encrypt = 1841 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1842 1843 /* 1844 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1845 * asynchronous data frame shall be transmitted after the CTS 1846 * frame and a SIFS period. 1847 */ 1848 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1849 } 1850 1851 data = &sc->txq.data[sc->txq.cur_encrypt]; 1852 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1853 1854 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0, 1855 segs, &nsegs, 0); 1856 if (error != 0 && error != EFBIG) { 1857 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1858 error); 1859 m_freem(m0); 1860 return error; 1861 } 1862 if (error != 0) { 1863 mnew = m_defrag(m0, M_DONTWAIT); 1864 if (mnew == NULL) { 1865 device_printf(sc->sc_dev, 1866 "could not defragment mbuf\n"); 1867 m_freem(m0); 1868 return ENOBUFS; 1869 } 1870 m0 = mnew; 1871 1872 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1873 m0, segs, &nsegs, 0); 1874 if (error != 0) { 1875 device_printf(sc->sc_dev, 1876 "could not map mbuf (error %d)\n", error); 1877 m_freem(m0); 1878 return error; 1879 } 1880 1881 /* packet header may have moved, reset our local pointer */ 1882 wh = mtod(m0, struct ieee80211_frame *); 1883 } 1884 1885 if (bpf_peers_present(sc->sc_drvbpf)) { 1886 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1887 1888 tap->wt_flags = 0; 1889 tap->wt_rate = rate; 1890 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1891 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1892 tap->wt_antenna = sc->tx_ant; 1893 1894 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1895 } 1896 1897 data->m = m0; 1898 data->ni = ni; 1899 1900 /* remember link conditions for rate adaptation algorithm */ 1901 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1902 data->id.id_len = m0->m_pkthdr.len; 1903 data->id.id_rateidx = ni->ni_txrate; 1904 data->id.id_node = ni; 1905 data->id.id_rssi = ni->ni_rssi; 1906 } else 1907 data->id.id_node = NULL; 1908 1909 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1910 flags |= RT2560_TX_ACK; 1911 1912 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1913 ic->ic_flags) + RAL_SIFS; 1914 *(uint16_t *)wh->i_dur = htole16(dur); 1915 } 1916 1917 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, 1918 segs->ds_addr); 1919 1920 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1921 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1922 BUS_DMASYNC_PREWRITE); 1923 1924 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1925 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1926 1927 /* kick encrypt */ 1928 sc->txq.queued++; 1929 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1930 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 1931 1932 return 0; 1933 } 1934 1935 static void 1936 rt2560_start(struct ifnet *ifp) 1937 { 1938 struct rt2560_softc *sc = ifp->if_softc; 1939 struct ieee80211com *ic = &sc->sc_ic; 1940 struct mbuf *m0; 1941 struct ether_header *eh; 1942 struct ieee80211_node *ni; 1943 1944 RAL_LOCK(sc); 1945 1946 /* prevent management frames from being sent if we're not ready */ 1947 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1948 RAL_UNLOCK(sc); 1949 return; 1950 } 1951 1952 for (;;) { 1953 IF_POLL(&ic->ic_mgtq, m0); 1954 if (m0 != NULL) { 1955 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 1956 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1957 break; 1958 } 1959 IF_DEQUEUE(&ic->ic_mgtq, m0); 1960 1961 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1962 m0->m_pkthdr.rcvif = NULL; 1963 1964 if (bpf_peers_present(ic->ic_rawbpf)) 1965 bpf_mtap(ic->ic_rawbpf, m0); 1966 1967 if (rt2560_tx_mgt(sc, m0, ni) != 0) 1968 break; 1969 1970 } else { 1971 if (ic->ic_state != IEEE80211_S_RUN) 1972 break; 1973 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 1974 if (m0 == NULL) 1975 break; 1976 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 1977 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 1978 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1979 break; 1980 } 1981 1982 if (m0->m_len < sizeof (struct ether_header) && 1983 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 1984 continue; 1985 1986 eh = mtod(m0, struct ether_header *); 1987 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1988 if (ni == NULL) { 1989 m_freem(m0); 1990 continue; 1991 } 1992 BPF_MTAP(ifp, m0); 1993 1994 m0 = ieee80211_encap(ic, m0, ni); 1995 if (m0 == NULL) { 1996 ieee80211_free_node(ni); 1997 continue; 1998 } 1999 2000 if (bpf_peers_present(ic->ic_rawbpf)) 2001 bpf_mtap(ic->ic_rawbpf, m0); 2002 2003 if (rt2560_tx_data(sc, m0, ni) != 0) { 2004 ieee80211_free_node(ni); 2005 ifp->if_oerrors++; 2006 break; 2007 } 2008 } 2009 2010 sc->sc_tx_timer = 5; 2011 ifp->if_timer = 1; 2012 } 2013 2014 RAL_UNLOCK(sc); 2015 } 2016 2017 static void 2018 rt2560_watchdog(struct ifnet *ifp) 2019 { 2020 struct rt2560_softc *sc = ifp->if_softc; 2021 struct ieee80211com *ic = &sc->sc_ic; 2022 2023 RAL_LOCK(sc); 2024 2025 ifp->if_timer = 0; 2026 2027 if (sc->sc_tx_timer > 0) { 2028 if (--sc->sc_tx_timer == 0) { 2029 device_printf(sc->sc_dev, "device timeout\n"); 2030 rt2560_init(sc); 2031 ifp->if_oerrors++; 2032 RAL_UNLOCK(sc); 2033 return; 2034 } 2035 ifp->if_timer = 1; 2036 } 2037 2038 ieee80211_watchdog(ic); 2039 2040 RAL_UNLOCK(sc); 2041 } 2042 2043 /* 2044 * This function allows for fast channel switching in monitor mode (used by 2045 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2046 * generate a new beacon frame. 2047 */ 2048 static int 2049 rt2560_reset(struct ifnet *ifp) 2050 { 2051 struct rt2560_softc *sc = ifp->if_softc; 2052 struct ieee80211com *ic = &sc->sc_ic; 2053 2054 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2055 return ENETRESET; 2056 2057 rt2560_set_chan(sc, ic->ic_curchan); 2058 2059 return 0; 2060 } 2061 2062 static int 2063 rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2064 { 2065 struct rt2560_softc *sc = ifp->if_softc; 2066 struct ieee80211com *ic = &sc->sc_ic; 2067 int error = 0; 2068 2069 RAL_LOCK(sc); 2070 2071 switch (cmd) { 2072 case SIOCSIFFLAGS: 2073 if (ifp->if_flags & IFF_UP) { 2074 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2075 rt2560_update_promisc(sc); 2076 else 2077 rt2560_init(sc); 2078 } else { 2079 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2080 rt2560_stop(sc); 2081 } 2082 break; 2083 2084 default: 2085 error = ieee80211_ioctl(ic, cmd, data); 2086 } 2087 2088 if (error == ENETRESET) { 2089 if ((ifp->if_flags & IFF_UP) && 2090 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 2091 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2092 rt2560_init(sc); 2093 error = 0; 2094 } 2095 2096 RAL_UNLOCK(sc); 2097 2098 return error; 2099 } 2100 2101 static void 2102 rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2103 { 2104 uint32_t tmp; 2105 int ntries; 2106 2107 for (ntries = 0; ntries < 100; ntries++) { 2108 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2109 break; 2110 DELAY(1); 2111 } 2112 if (ntries == 100) { 2113 device_printf(sc->sc_dev, "could not write to BBP\n"); 2114 return; 2115 } 2116 2117 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2118 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2119 2120 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2121 } 2122 2123 static uint8_t 2124 rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2125 { 2126 uint32_t val; 2127 int ntries; 2128 2129 val = RT2560_BBP_BUSY | reg << 8; 2130 RAL_WRITE(sc, RT2560_BBPCSR, val); 2131 2132 for (ntries = 0; ntries < 100; ntries++) { 2133 val = RAL_READ(sc, RT2560_BBPCSR); 2134 if (!(val & RT2560_BBP_BUSY)) 2135 return val & 0xff; 2136 DELAY(1); 2137 } 2138 2139 device_printf(sc->sc_dev, "could not read from BBP\n"); 2140 return 0; 2141 } 2142 2143 static void 2144 rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2145 { 2146 uint32_t tmp; 2147 int ntries; 2148 2149 for (ntries = 0; ntries < 100; ntries++) { 2150 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2151 break; 2152 DELAY(1); 2153 } 2154 if (ntries == 100) { 2155 device_printf(sc->sc_dev, "could not write to RF\n"); 2156 return; 2157 } 2158 2159 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2160 (reg & 0x3); 2161 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2162 2163 /* remember last written value in sc */ 2164 sc->rf_regs[reg] = val; 2165 2166 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2167 } 2168 2169 static void 2170 rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2171 { 2172 struct ieee80211com *ic = &sc->sc_ic; 2173 uint8_t power, tmp; 2174 u_int i, chan; 2175 2176 chan = ieee80211_chan2ieee(ic, c); 2177 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2178 return; 2179 2180 if (IEEE80211_IS_CHAN_2GHZ(c)) 2181 power = min(sc->txpow[chan - 1], 31); 2182 else 2183 power = 31; 2184 2185 /* adjust txpower using ifconfig settings */ 2186 power -= (100 - ic->ic_txpowlimit) / 8; 2187 2188 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2189 2190 switch (sc->rf_rev) { 2191 case RT2560_RF_2522: 2192 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2193 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2194 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2195 break; 2196 2197 case RT2560_RF_2523: 2198 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2199 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2200 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2201 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2202 break; 2203 2204 case RT2560_RF_2524: 2205 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2206 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2207 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2208 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2209 break; 2210 2211 case RT2560_RF_2525: 2212 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2213 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2214 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2215 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2216 2217 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2218 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2219 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2220 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2221 break; 2222 2223 case RT2560_RF_2525E: 2224 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2225 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2226 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2227 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2228 break; 2229 2230 case RT2560_RF_2526: 2231 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2232 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2233 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2234 2235 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2236 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2237 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2238 break; 2239 2240 /* dual-band RF */ 2241 case RT2560_RF_5222: 2242 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2243 2244 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2245 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2246 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2247 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2248 break; 2249 } 2250 2251 if (ic->ic_state != IEEE80211_S_SCAN) { 2252 /* set Japan filter bit for channel 14 */ 2253 tmp = rt2560_bbp_read(sc, 70); 2254 2255 tmp &= ~RT2560_JAPAN_FILTER; 2256 if (chan == 14) 2257 tmp |= RT2560_JAPAN_FILTER; 2258 2259 rt2560_bbp_write(sc, 70, tmp); 2260 2261 /* clear CRC errors */ 2262 RAL_READ(sc, RT2560_CNT0); 2263 } 2264 } 2265 2266 #if 0 2267 /* 2268 * Disable RF auto-tuning. 2269 */ 2270 static void 2271 rt2560_disable_rf_tune(struct rt2560_softc *sc) 2272 { 2273 uint32_t tmp; 2274 2275 if (sc->rf_rev != RT2560_RF_2523) { 2276 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2277 rt2560_rf_write(sc, RAL_RF1, tmp); 2278 } 2279 2280 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2281 rt2560_rf_write(sc, RAL_RF3, tmp); 2282 2283 DPRINTFN(2, ("disabling RF autotune\n")); 2284 } 2285 #endif 2286 2287 /* 2288 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2289 * synchronization. 2290 */ 2291 static void 2292 rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2293 { 2294 struct ieee80211com *ic = &sc->sc_ic; 2295 uint16_t logcwmin, preload; 2296 uint32_t tmp; 2297 2298 /* first, disable TSF synchronization */ 2299 RAL_WRITE(sc, RT2560_CSR14, 0); 2300 2301 tmp = 16 * ic->ic_bss->ni_intval; 2302 RAL_WRITE(sc, RT2560_CSR12, tmp); 2303 2304 RAL_WRITE(sc, RT2560_CSR13, 0); 2305 2306 logcwmin = 5; 2307 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2308 tmp = logcwmin << 16 | preload; 2309 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2310 2311 /* finally, enable TSF synchronization */ 2312 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2313 if (ic->ic_opmode == IEEE80211_M_STA) 2314 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2315 else 2316 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2317 RT2560_ENABLE_BEACON_GENERATOR; 2318 RAL_WRITE(sc, RT2560_CSR14, tmp); 2319 2320 DPRINTF(("enabling TSF synchronization\n")); 2321 } 2322 2323 static void 2324 rt2560_update_plcp(struct rt2560_softc *sc) 2325 { 2326 struct ieee80211com *ic = &sc->sc_ic; 2327 2328 /* no short preamble for 1Mbps */ 2329 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2330 2331 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2332 /* values taken from the reference driver */ 2333 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2334 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2335 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2336 } else { 2337 /* same values as above or'ed 0x8 */ 2338 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2339 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2340 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2341 } 2342 2343 DPRINTF(("updating PLCP for %s preamble\n", 2344 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2345 } 2346 2347 /* 2348 * This function can be called by ieee80211_set_shortslottime(). Refer to 2349 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2350 */ 2351 static void 2352 rt2560_update_slot(struct ifnet *ifp) 2353 { 2354 struct rt2560_softc *sc = ifp->if_softc; 2355 struct ieee80211com *ic = &sc->sc_ic; 2356 uint8_t slottime; 2357 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2358 uint32_t tmp; 2359 2360 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2361 2362 /* update the MAC slot boundaries */ 2363 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2364 tx_pifs = tx_sifs + slottime; 2365 tx_difs = tx_sifs + 2 * slottime; 2366 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2367 2368 tmp = RAL_READ(sc, RT2560_CSR11); 2369 tmp = (tmp & ~0x1f00) | slottime << 8; 2370 RAL_WRITE(sc, RT2560_CSR11, tmp); 2371 2372 tmp = tx_pifs << 16 | tx_sifs; 2373 RAL_WRITE(sc, RT2560_CSR18, tmp); 2374 2375 tmp = eifs << 16 | tx_difs; 2376 RAL_WRITE(sc, RT2560_CSR19, tmp); 2377 2378 DPRINTF(("setting slottime to %uus\n", slottime)); 2379 } 2380 2381 static void 2382 rt2560_set_basicrates(struct rt2560_softc *sc) 2383 { 2384 struct ieee80211com *ic = &sc->sc_ic; 2385 2386 /* update basic rate set */ 2387 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2388 /* 11b basic rates: 1, 2Mbps */ 2389 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2390 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2391 /* 11a basic rates: 6, 12, 24Mbps */ 2392 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2393 } else { 2394 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2395 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2396 } 2397 } 2398 2399 static void 2400 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2401 { 2402 uint32_t tmp; 2403 2404 /* set ON period to 70ms and OFF period to 30ms */ 2405 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2406 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2407 } 2408 2409 static void 2410 rt2560_set_bssid(struct rt2560_softc *sc, uint8_t *bssid) 2411 { 2412 uint32_t tmp; 2413 2414 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2415 RAL_WRITE(sc, RT2560_CSR5, tmp); 2416 2417 tmp = bssid[4] | bssid[5] << 8; 2418 RAL_WRITE(sc, RT2560_CSR6, tmp); 2419 2420 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2421 } 2422 2423 static void 2424 rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2425 { 2426 uint32_t tmp; 2427 2428 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2429 RAL_WRITE(sc, RT2560_CSR3, tmp); 2430 2431 tmp = addr[4] | addr[5] << 8; 2432 RAL_WRITE(sc, RT2560_CSR4, tmp); 2433 2434 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2435 } 2436 2437 static void 2438 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2439 { 2440 uint32_t tmp; 2441 2442 tmp = RAL_READ(sc, RT2560_CSR3); 2443 addr[0] = tmp & 0xff; 2444 addr[1] = (tmp >> 8) & 0xff; 2445 addr[2] = (tmp >> 16) & 0xff; 2446 addr[3] = (tmp >> 24); 2447 2448 tmp = RAL_READ(sc, RT2560_CSR4); 2449 addr[4] = tmp & 0xff; 2450 addr[5] = (tmp >> 8) & 0xff; 2451 } 2452 2453 static void 2454 rt2560_update_promisc(struct rt2560_softc *sc) 2455 { 2456 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2457 uint32_t tmp; 2458 2459 tmp = RAL_READ(sc, RT2560_RXCSR0); 2460 2461 tmp &= ~RT2560_DROP_NOT_TO_ME; 2462 if (!(ifp->if_flags & IFF_PROMISC)) 2463 tmp |= RT2560_DROP_NOT_TO_ME; 2464 2465 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2466 2467 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2468 "entering" : "leaving")); 2469 } 2470 2471 static const char * 2472 rt2560_get_rf(int rev) 2473 { 2474 switch (rev) { 2475 case RT2560_RF_2522: return "RT2522"; 2476 case RT2560_RF_2523: return "RT2523"; 2477 case RT2560_RF_2524: return "RT2524"; 2478 case RT2560_RF_2525: return "RT2525"; 2479 case RT2560_RF_2525E: return "RT2525e"; 2480 case RT2560_RF_2526: return "RT2526"; 2481 case RT2560_RF_5222: return "RT5222"; 2482 default: return "unknown"; 2483 } 2484 } 2485 2486 static void 2487 rt2560_read_eeprom(struct rt2560_softc *sc) 2488 { 2489 uint16_t val; 2490 int i; 2491 2492 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2493 sc->rf_rev = (val >> 11) & 0x7; 2494 sc->hw_radio = (val >> 10) & 0x1; 2495 sc->led_mode = (val >> 6) & 0x7; 2496 sc->rx_ant = (val >> 4) & 0x3; 2497 sc->tx_ant = (val >> 2) & 0x3; 2498 sc->nb_ant = val & 0x3; 2499 2500 /* read default values for BBP registers */ 2501 for (i = 0; i < 16; i++) { 2502 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2503 sc->bbp_prom[i].reg = val >> 8; 2504 sc->bbp_prom[i].val = val & 0xff; 2505 } 2506 2507 /* read Tx power for all b/g channels */ 2508 for (i = 0; i < 14 / 2; i++) { 2509 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2510 sc->txpow[i * 2] = val >> 8; 2511 sc->txpow[i * 2 + 1] = val & 0xff; 2512 } 2513 } 2514 2515 static int 2516 rt2560_bbp_init(struct rt2560_softc *sc) 2517 { 2518 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2519 int i, ntries; 2520 2521 /* wait for BBP to be ready */ 2522 for (ntries = 0; ntries < 100; ntries++) { 2523 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2524 break; 2525 DELAY(1); 2526 } 2527 if (ntries == 100) { 2528 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2529 return EIO; 2530 } 2531 2532 /* initialize BBP registers to default values */ 2533 for (i = 0; i < N(rt2560_def_bbp); i++) { 2534 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2535 rt2560_def_bbp[i].val); 2536 } 2537 #if 0 2538 /* initialize BBP registers to values stored in EEPROM */ 2539 for (i = 0; i < 16; i++) { 2540 if (sc->bbp_prom[i].reg == 0xff) 2541 continue; 2542 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2543 } 2544 #endif 2545 2546 return 0; 2547 #undef N 2548 } 2549 2550 static void 2551 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2552 { 2553 uint32_t tmp; 2554 uint8_t tx; 2555 2556 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2557 if (antenna == 1) 2558 tx |= RT2560_BBP_ANTA; 2559 else if (antenna == 2) 2560 tx |= RT2560_BBP_ANTB; 2561 else 2562 tx |= RT2560_BBP_DIVERSITY; 2563 2564 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2565 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2566 sc->rf_rev == RT2560_RF_5222) 2567 tx |= RT2560_BBP_FLIPIQ; 2568 2569 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2570 2571 /* update values for CCK and OFDM in BBPCSR1 */ 2572 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2573 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2574 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2575 } 2576 2577 static void 2578 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2579 { 2580 uint8_t rx; 2581 2582 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2583 if (antenna == 1) 2584 rx |= RT2560_BBP_ANTA; 2585 else if (antenna == 2) 2586 rx |= RT2560_BBP_ANTB; 2587 else 2588 rx |= RT2560_BBP_DIVERSITY; 2589 2590 /* need to force no I/Q flip for RF 2525e and 2526 */ 2591 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2592 rx &= ~RT2560_BBP_FLIPIQ; 2593 2594 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2595 } 2596 2597 static void 2598 rt2560_init(void *priv) 2599 { 2600 #define N(a) (sizeof (a) / sizeof ((a)[0])) 2601 struct rt2560_softc *sc = priv; 2602 struct ieee80211com *ic = &sc->sc_ic; 2603 struct ifnet *ifp = ic->ic_ifp; 2604 uint32_t tmp; 2605 int i; 2606 2607 RAL_LOCK(sc); 2608 2609 rt2560_stop(sc); 2610 2611 /* setup tx rings */ 2612 tmp = RT2560_PRIO_RING_COUNT << 24 | 2613 RT2560_ATIM_RING_COUNT << 16 | 2614 RT2560_TX_RING_COUNT << 8 | 2615 RT2560_TX_DESC_SIZE; 2616 2617 /* rings must be initialized in this exact order */ 2618 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2619 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2620 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2621 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2622 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2623 2624 /* setup rx ring */ 2625 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2626 2627 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2628 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2629 2630 /* initialize MAC registers to default values */ 2631 for (i = 0; i < N(rt2560_def_mac); i++) 2632 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2633 2634 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2635 rt2560_set_macaddr(sc, ic->ic_myaddr); 2636 2637 /* set basic rate set (will be updated later) */ 2638 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2639 2640 rt2560_set_txantenna(sc, sc->tx_ant); 2641 rt2560_set_rxantenna(sc, sc->rx_ant); 2642 rt2560_update_slot(ifp); 2643 rt2560_update_plcp(sc); 2644 rt2560_update_led(sc, 0, 0); 2645 2646 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2647 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2648 2649 if (rt2560_bbp_init(sc) != 0) { 2650 rt2560_stop(sc); 2651 RAL_UNLOCK(sc); 2652 return; 2653 } 2654 2655 /* set default BSS channel */ 2656 rt2560_set_chan(sc, ic->ic_curchan); 2657 2658 /* kick Rx */ 2659 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2660 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2661 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2662 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2663 tmp |= RT2560_DROP_TODS; 2664 if (!(ifp->if_flags & IFF_PROMISC)) 2665 tmp |= RT2560_DROP_NOT_TO_ME; 2666 } 2667 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2668 2669 /* clear old FCS and Rx FIFO errors */ 2670 RAL_READ(sc, RT2560_CNT0); 2671 RAL_READ(sc, RT2560_CNT4); 2672 2673 /* clear any pending interrupts */ 2674 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2675 2676 /* enable interrupts */ 2677 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2678 2679 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2680 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2681 2682 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2683 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2684 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2685 } else 2686 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2687 2688 RAL_UNLOCK(sc); 2689 #undef N 2690 } 2691 2692 void 2693 rt2560_stop(void *priv) 2694 { 2695 struct rt2560_softc *sc = priv; 2696 struct ieee80211com *ic = &sc->sc_ic; 2697 struct ifnet *ifp = ic->ic_ifp; 2698 2699 sc->sc_tx_timer = 0; 2700 ifp->if_timer = 0; 2701 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2702 2703 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2704 2705 /* abort Tx */ 2706 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2707 2708 /* disable Rx */ 2709 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2710 2711 /* reset ASIC (imply reset BBP) */ 2712 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2713 RAL_WRITE(sc, RT2560_CSR1, 0); 2714 2715 /* disable interrupts */ 2716 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2717 2718 /* reset Tx and Rx rings */ 2719 rt2560_reset_tx_ring(sc, &sc->txq); 2720 rt2560_reset_tx_ring(sc, &sc->atimq); 2721 rt2560_reset_tx_ring(sc, &sc->prioq); 2722 rt2560_reset_tx_ring(sc, &sc->bcnq); 2723 rt2560_reset_rx_ring(sc, &sc->rxq); 2724 } 2725