rt2560.c revision 173386
1/* $FreeBSD: head/sys/dev/ral/rt2560.c 173386 2007-11-06 07:30:12Z kevlo $ */ 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: head/sys/dev/ral/rt2560.c 173386 2007-11-06 07:30:12Z kevlo $"); 22 23/*- 24 * Ralink Technology RT2560 chipset driver 25 * http://www.ralinktech.com/ 26 */ 27 28#include <sys/param.h> 29#include <sys/sysctl.h> 30#include <sys/sockio.h> 31#include <sys/mbuf.h> 32#include <sys/kernel.h> 33#include <sys/socket.h> 34#include <sys/systm.h> 35#include <sys/malloc.h> 36#include <sys/lock.h> 37#include <sys/mutex.h> 38#include <sys/module.h> 39#include <sys/bus.h> 40#include <sys/endian.h> 41 42#include <machine/bus.h> 43#include <machine/resource.h> 44#include <sys/rman.h> 45 46#include <net/bpf.h> 47#include <net/if.h> 48#include <net/if_arp.h> 49#include <net/ethernet.h> 50#include <net/if_dl.h> 51#include <net/if_media.h> 52#include <net/if_types.h> 53 54#include <net80211/ieee80211_var.h> 55#include <net80211/ieee80211_radiotap.h> 56#include <net80211/ieee80211_regdomain.h> 57 58#include <netinet/in.h> 59#include <netinet/in_systm.h> 60#include <netinet/in_var.h> 61#include <netinet/ip.h> 62#include <netinet/if_ether.h> 63 64#include <dev/ral/if_ralrate.h> 65#include <dev/ral/rt2560reg.h> 66#include <dev/ral/rt2560var.h> 67 68#define RT2560_RSSI(sc, rssi) \ 69 ((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ? \ 70 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0) 71 72#ifdef RAL_DEBUG 73#define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 74#define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 75extern int ral_debug; 76#else 77#define DPRINTF(x) 78#define DPRINTFN(n, x) 79#endif 80 81static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 82 int); 83static int rt2560_alloc_tx_ring(struct rt2560_softc *, 84 struct rt2560_tx_ring *, int); 85static void rt2560_reset_tx_ring(struct rt2560_softc *, 86 struct rt2560_tx_ring *); 87static void rt2560_free_tx_ring(struct rt2560_softc *, 88 struct rt2560_tx_ring *); 89static int rt2560_alloc_rx_ring(struct rt2560_softc *, 90 struct rt2560_rx_ring *, int); 91static void rt2560_reset_rx_ring(struct rt2560_softc *, 92 struct rt2560_rx_ring *); 93static void rt2560_free_rx_ring(struct rt2560_softc *, 94 struct rt2560_rx_ring *); 95static struct ieee80211_node *rt2560_node_alloc( 96 struct ieee80211_node_table *); 97static int rt2560_media_change(struct ifnet *); 98static void rt2560_iter_func(void *, struct ieee80211_node *); 99static void rt2560_update_rssadapt(void *); 100static int rt2560_newstate(struct ieee80211com *, 101 enum ieee80211_state, int); 102static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 103static void rt2560_encryption_intr(struct rt2560_softc *); 104static void rt2560_tx_intr(struct rt2560_softc *); 105static void rt2560_prio_intr(struct rt2560_softc *); 106static void rt2560_decryption_intr(struct rt2560_softc *); 107static void rt2560_rx_intr(struct rt2560_softc *); 108static void rt2560_beacon_update(struct ieee80211com *, int item); 109static void rt2560_beacon_expire(struct rt2560_softc *); 110static void rt2560_wakeup_expire(struct rt2560_softc *); 111static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 112static int rt2560_ack_rate(struct ieee80211com *, int); 113static void rt2560_scan_start(struct ieee80211com *); 114static void rt2560_scan_end(struct ieee80211com *); 115static void rt2560_set_channel(struct ieee80211com *); 116static uint16_t rt2560_txtime(int, int, uint32_t); 117static uint8_t rt2560_plcp_signal(int); 118static void rt2560_setup_tx_desc(struct rt2560_softc *, 119 struct rt2560_tx_desc *, uint32_t, int, int, int, 120 bus_addr_t); 121static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 122 struct ieee80211_node *); 123static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 124 struct ieee80211_node *); 125static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 126 struct ieee80211_frame *, uint16_t); 127static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 128 struct ieee80211_node *); 129static void rt2560_start(struct ifnet *); 130static void rt2560_watchdog(void *); 131static int rt2560_reset(struct ifnet *); 132static int rt2560_ioctl(struct ifnet *, u_long, caddr_t); 133static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 134 uint8_t); 135static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 136static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 137 uint32_t); 138static void rt2560_set_chan(struct rt2560_softc *, 139 struct ieee80211_channel *); 140#if 0 141static void rt2560_disable_rf_tune(struct rt2560_softc *); 142#endif 143static void rt2560_enable_tsf_sync(struct rt2560_softc *); 144static void rt2560_update_plcp(struct rt2560_softc *); 145static void rt2560_update_slot(struct ifnet *); 146static void rt2560_set_basicrates(struct rt2560_softc *); 147static void rt2560_update_led(struct rt2560_softc *, int, int); 148static void rt2560_set_bssid(struct rt2560_softc *, const uint8_t *); 149static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 150static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 151static void rt2560_update_promisc(struct rt2560_softc *); 152static const char *rt2560_get_rf(int); 153static void rt2560_read_eeprom(struct rt2560_softc *); 154static int rt2560_bbp_init(struct rt2560_softc *); 155static void rt2560_set_txantenna(struct rt2560_softc *, int); 156static void rt2560_set_rxantenna(struct rt2560_softc *, int); 157static void rt2560_init(void *); 158static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *, 159 const struct ieee80211_bpf_params *); 160 161static const struct { 162 uint32_t reg; 163 uint32_t val; 164} rt2560_def_mac[] = { 165 RT2560_DEF_MAC 166}; 167 168static const struct { 169 uint8_t reg; 170 uint8_t val; 171} rt2560_def_bbp[] = { 172 RT2560_DEF_BBP 173}; 174 175static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 176static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 177static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 178static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 179static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 180static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 181static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 182static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 183 184static const struct { 185 uint8_t chan; 186 uint32_t r1, r2, r4; 187} rt2560_rf5222[] = { 188 RT2560_RF5222 189}; 190 191int 192rt2560_attach(device_t dev, int id) 193{ 194 struct rt2560_softc *sc = device_get_softc(dev); 195 struct ieee80211com *ic = &sc->sc_ic; 196 struct ifnet *ifp; 197 int error, bands; 198 199 sc->sc_dev = dev; 200 201 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 202 MTX_DEF | MTX_RECURSE); 203 204 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 205 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 206 207 /* retrieve RT2560 rev. no */ 208 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 209 210 /* retrieve MAC address */ 211 rt2560_get_macaddr(sc, ic->ic_myaddr); 212 213 /* retrieve RF rev. no and various other things from EEPROM */ 214 rt2560_read_eeprom(sc); 215 216 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 217 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 218 219 /* 220 * Allocate Tx and Rx rings. 221 */ 222 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 223 if (error != 0) { 224 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 225 goto fail1; 226 } 227 228 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 229 if (error != 0) { 230 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 231 goto fail2; 232 } 233 234 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 235 if (error != 0) { 236 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 237 goto fail3; 238 } 239 240 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 241 if (error != 0) { 242 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 243 goto fail4; 244 } 245 246 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 247 if (error != 0) { 248 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 249 goto fail5; 250 } 251 252 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 253 if (ifp == NULL) { 254 device_printf(sc->sc_dev, "can not if_alloc()\n"); 255 goto fail6; 256 } 257 258 ifp->if_softc = sc; 259 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 260 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 261 ifp->if_init = rt2560_init; 262 ifp->if_ioctl = rt2560_ioctl; 263 ifp->if_start = rt2560_start; 264 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 265 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 266 IFQ_SET_READY(&ifp->if_snd); 267 268 ic->ic_ifp = ifp; 269 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 270 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 271 ic->ic_state = IEEE80211_S_INIT; 272 273 /* set device capabilities */ 274 ic->ic_caps = 275 IEEE80211_C_IBSS | /* IBSS mode supported */ 276 IEEE80211_C_MONITOR | /* monitor mode supported */ 277 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 278 IEEE80211_C_TXPMGT | /* tx power management */ 279 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 280 IEEE80211_C_SHSLOT | /* short slot time supported */ 281 IEEE80211_C_BGSCAN | /* bg scanning support */ 282 IEEE80211_C_WPA; /* 802.11i */ 283 284 bands = 0; 285 setbit(&bands, IEEE80211_MODE_11B); 286 setbit(&bands, IEEE80211_MODE_11G); 287 if (sc->rf_rev == RT2560_RF_5222) 288 setbit(&bands, IEEE80211_MODE_11A); 289 ieee80211_init_channels(ic, 0, CTRY_DEFAULT, bands, 0, 1); 290 291 ieee80211_ifattach(ic); 292 ic->ic_scan_start = rt2560_scan_start; 293 ic->ic_scan_end = rt2560_scan_end; 294 ic->ic_set_channel = rt2560_set_channel; 295 ic->ic_node_alloc = rt2560_node_alloc; 296 ic->ic_updateslot = rt2560_update_slot; 297 ic->ic_reset = rt2560_reset; 298 /* enable s/w bmiss handling in sta mode */ 299 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 300 301 /* override state transition machine */ 302 sc->sc_newstate = ic->ic_newstate; 303 ic->ic_newstate = rt2560_newstate; 304 ic->ic_raw_xmit = rt2560_raw_xmit; 305 ic->ic_update_beacon = rt2560_beacon_update; 306 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 307 308 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 309 sizeof (struct ieee80211_frame) + sizeof (sc->sc_txtap), 310 &sc->sc_drvbpf); 311 312 sc->sc_rxtap_len = sizeof sc->sc_rxtap; 313 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 314 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 315 316 sc->sc_txtap_len = sizeof sc->sc_txtap; 317 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 318 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 319 320 /* 321 * Add a few sysctl knobs. 322 */ 323 sc->dwelltime = 200; 324 325 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 326 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 327 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 328 329 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 330 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 331 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 332 333 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 334 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 335 CTLFLAG_RW, &sc->dwelltime, 0, 336 "channel dwell time (ms) for AP/station scanning"); 337 338 if (bootverbose) 339 ieee80211_announce(ic); 340 341 return 0; 342 343fail6: rt2560_free_rx_ring(sc, &sc->rxq); 344fail5: rt2560_free_tx_ring(sc, &sc->bcnq); 345fail4: rt2560_free_tx_ring(sc, &sc->prioq); 346fail3: rt2560_free_tx_ring(sc, &sc->atimq); 347fail2: rt2560_free_tx_ring(sc, &sc->txq); 348fail1: mtx_destroy(&sc->sc_mtx); 349 350 return ENXIO; 351} 352 353int 354rt2560_detach(void *xsc) 355{ 356 struct rt2560_softc *sc = xsc; 357 struct ieee80211com *ic = &sc->sc_ic; 358 struct ifnet *ifp = ic->ic_ifp; 359 360 rt2560_stop(sc); 361 callout_stop(&sc->watchdog_ch); 362 callout_stop(&sc->rssadapt_ch); 363 364 bpfdetach(ifp); 365 ieee80211_ifdetach(ic); 366 367 rt2560_free_tx_ring(sc, &sc->txq); 368 rt2560_free_tx_ring(sc, &sc->atimq); 369 rt2560_free_tx_ring(sc, &sc->prioq); 370 rt2560_free_tx_ring(sc, &sc->bcnq); 371 rt2560_free_rx_ring(sc, &sc->rxq); 372 373 if_free(ifp); 374 375 mtx_destroy(&sc->sc_mtx); 376 377 return 0; 378} 379 380void 381rt2560_resume(void *xsc) 382{ 383 struct rt2560_softc *sc = xsc; 384 struct ifnet *ifp = sc->sc_ic.ic_ifp; 385 386 if (ifp->if_flags & IFF_UP) { 387 ifp->if_init(ifp->if_softc); 388 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 389 ifp->if_start(ifp); 390 } 391} 392 393static void 394rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 395{ 396 if (error != 0) 397 return; 398 399 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 400 401 *(bus_addr_t *)arg = segs[0].ds_addr; 402} 403 404static int 405rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 406 int count) 407{ 408 int i, error; 409 410 ring->count = count; 411 ring->queued = 0; 412 ring->cur = ring->next = 0; 413 ring->cur_encrypt = ring->next_encrypt = 0; 414 415 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 416 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 417 count * RT2560_TX_DESC_SIZE, 1, count * RT2560_TX_DESC_SIZE, 418 0, NULL, NULL, &ring->desc_dmat); 419 if (error != 0) { 420 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 421 goto fail; 422 } 423 424 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 425 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 426 if (error != 0) { 427 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 428 goto fail; 429 } 430 431 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 432 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 433 0); 434 if (error != 0) { 435 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 436 goto fail; 437 } 438 439 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 440 M_NOWAIT | M_ZERO); 441 if (ring->data == NULL) { 442 device_printf(sc->sc_dev, "could not allocate soft data\n"); 443 error = ENOMEM; 444 goto fail; 445 } 446 447 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 448 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 449 MCLBYTES, RT2560_MAX_SCATTER, MCLBYTES, 0, NULL, NULL, 450 &ring->data_dmat); 451 if (error != 0) { 452 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 453 goto fail; 454 } 455 456 for (i = 0; i < count; i++) { 457 error = bus_dmamap_create(ring->data_dmat, 0, 458 &ring->data[i].map); 459 if (error != 0) { 460 device_printf(sc->sc_dev, "could not create DMA map\n"); 461 goto fail; 462 } 463 } 464 465 return 0; 466 467fail: rt2560_free_tx_ring(sc, ring); 468 return error; 469} 470 471static void 472rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 473{ 474 struct rt2560_tx_desc *desc; 475 struct rt2560_tx_data *data; 476 int i; 477 478 for (i = 0; i < ring->count; i++) { 479 desc = &ring->desc[i]; 480 data = &ring->data[i]; 481 482 if (data->m != NULL) { 483 bus_dmamap_sync(ring->data_dmat, data->map, 484 BUS_DMASYNC_POSTWRITE); 485 bus_dmamap_unload(ring->data_dmat, data->map); 486 m_freem(data->m); 487 data->m = NULL; 488 } 489 490 if (data->ni != NULL) { 491 ieee80211_free_node(data->ni); 492 data->ni = NULL; 493 } 494 495 desc->flags = 0; 496 } 497 498 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 499 500 ring->queued = 0; 501 ring->cur = ring->next = 0; 502 ring->cur_encrypt = ring->next_encrypt = 0; 503} 504 505static void 506rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 507{ 508 struct rt2560_tx_data *data; 509 int i; 510 511 if (ring->desc != NULL) { 512 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 513 BUS_DMASYNC_POSTWRITE); 514 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 515 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 516 } 517 518 if (ring->desc_dmat != NULL) 519 bus_dma_tag_destroy(ring->desc_dmat); 520 521 if (ring->data != NULL) { 522 for (i = 0; i < ring->count; i++) { 523 data = &ring->data[i]; 524 525 if (data->m != NULL) { 526 bus_dmamap_sync(ring->data_dmat, data->map, 527 BUS_DMASYNC_POSTWRITE); 528 bus_dmamap_unload(ring->data_dmat, data->map); 529 m_freem(data->m); 530 } 531 532 if (data->ni != NULL) 533 ieee80211_free_node(data->ni); 534 535 if (data->map != NULL) 536 bus_dmamap_destroy(ring->data_dmat, data->map); 537 } 538 539 free(ring->data, M_DEVBUF); 540 } 541 542 if (ring->data_dmat != NULL) 543 bus_dma_tag_destroy(ring->data_dmat); 544} 545 546static int 547rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 548 int count) 549{ 550 struct rt2560_rx_desc *desc; 551 struct rt2560_rx_data *data; 552 bus_addr_t physaddr; 553 int i, error; 554 555 ring->count = count; 556 ring->cur = ring->next = 0; 557 ring->cur_decrypt = 0; 558 559 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 560 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 561 count * RT2560_RX_DESC_SIZE, 1, count * RT2560_RX_DESC_SIZE, 562 0, NULL, NULL, &ring->desc_dmat); 563 if (error != 0) { 564 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 565 goto fail; 566 } 567 568 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 569 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 570 if (error != 0) { 571 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 572 goto fail; 573 } 574 575 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 576 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 577 0); 578 if (error != 0) { 579 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 580 goto fail; 581 } 582 583 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 584 M_NOWAIT | M_ZERO); 585 if (ring->data == NULL) { 586 device_printf(sc->sc_dev, "could not allocate soft data\n"); 587 error = ENOMEM; 588 goto fail; 589 } 590 591 /* 592 * Pre-allocate Rx buffers and populate Rx ring. 593 */ 594 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 595 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 596 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 597 if (error != 0) { 598 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 599 goto fail; 600 } 601 602 for (i = 0; i < count; i++) { 603 desc = &sc->rxq.desc[i]; 604 data = &sc->rxq.data[i]; 605 606 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 607 if (error != 0) { 608 device_printf(sc->sc_dev, "could not create DMA map\n"); 609 goto fail; 610 } 611 612 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 613 if (data->m == NULL) { 614 device_printf(sc->sc_dev, 615 "could not allocate rx mbuf\n"); 616 error = ENOMEM; 617 goto fail; 618 } 619 620 error = bus_dmamap_load(ring->data_dmat, data->map, 621 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 622 &physaddr, 0); 623 if (error != 0) { 624 device_printf(sc->sc_dev, 625 "could not load rx buf DMA map"); 626 goto fail; 627 } 628 629 desc->flags = htole32(RT2560_RX_BUSY); 630 desc->physaddr = htole32(physaddr); 631 } 632 633 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 634 635 return 0; 636 637fail: rt2560_free_rx_ring(sc, ring); 638 return error; 639} 640 641static void 642rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 643{ 644 int i; 645 646 for (i = 0; i < ring->count; i++) { 647 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 648 ring->data[i].drop = 0; 649 } 650 651 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 652 653 ring->cur = ring->next = 0; 654 ring->cur_decrypt = 0; 655} 656 657static void 658rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 659{ 660 struct rt2560_rx_data *data; 661 int i; 662 663 if (ring->desc != NULL) { 664 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 665 BUS_DMASYNC_POSTWRITE); 666 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 667 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 668 } 669 670 if (ring->desc_dmat != NULL) 671 bus_dma_tag_destroy(ring->desc_dmat); 672 673 if (ring->data != NULL) { 674 for (i = 0; i < ring->count; i++) { 675 data = &ring->data[i]; 676 677 if (data->m != NULL) { 678 bus_dmamap_sync(ring->data_dmat, data->map, 679 BUS_DMASYNC_POSTREAD); 680 bus_dmamap_unload(ring->data_dmat, data->map); 681 m_freem(data->m); 682 } 683 684 if (data->map != NULL) 685 bus_dmamap_destroy(ring->data_dmat, data->map); 686 } 687 688 free(ring->data, M_DEVBUF); 689 } 690 691 if (ring->data_dmat != NULL) 692 bus_dma_tag_destroy(ring->data_dmat); 693} 694 695static struct ieee80211_node * 696rt2560_node_alloc(struct ieee80211_node_table *nt) 697{ 698 struct rt2560_node *rn; 699 700 rn = malloc(sizeof (struct rt2560_node), M_80211_NODE, 701 M_NOWAIT | M_ZERO); 702 703 return (rn != NULL) ? &rn->ni : NULL; 704} 705 706static int 707rt2560_media_change(struct ifnet *ifp) 708{ 709 struct rt2560_softc *sc = ifp->if_softc; 710 int error; 711 712 error = ieee80211_media_change(ifp); 713 714 if (error == ENETRESET) { 715 if ((ifp->if_flags & IFF_UP) && 716 (ifp->if_drv_flags & IFF_DRV_RUNNING)) 717 rt2560_init(sc); 718 } 719 return error; 720} 721 722/* 723 * This function is called for each node present in the node station table. 724 */ 725static void 726rt2560_iter_func(void *arg, struct ieee80211_node *ni) 727{ 728 struct rt2560_node *rn = (struct rt2560_node *)ni; 729 730 ral_rssadapt_updatestats(&rn->rssadapt); 731} 732 733/* 734 * This function is called periodically (every 100ms) in RUN state to update 735 * the rate adaptation statistics. 736 */ 737static void 738rt2560_update_rssadapt(void *arg) 739{ 740 struct rt2560_softc *sc = arg; 741 struct ieee80211com *ic = &sc->sc_ic; 742 743 RAL_LOCK(sc); 744 745 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 746 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 747 748 RAL_UNLOCK(sc); 749} 750 751static int 752rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 753{ 754 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 755 enum ieee80211_state ostate; 756 struct ieee80211_node *ni; 757 struct mbuf *m; 758 int error = 0; 759 760 ostate = ic->ic_state; 761 762 switch (nstate) { 763 case IEEE80211_S_INIT: 764 callout_stop(&sc->rssadapt_ch); 765 766 if (ostate == IEEE80211_S_RUN) { 767 /* abort TSF synchronization */ 768 RAL_WRITE(sc, RT2560_CSR14, 0); 769 770 /* turn association led off */ 771 rt2560_update_led(sc, 0, 0); 772 } 773 break; 774 case IEEE80211_S_RUN: 775 ni = ic->ic_bss; 776 777 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 778 rt2560_update_plcp(sc); 779 rt2560_set_basicrates(sc); 780 rt2560_set_bssid(sc, ni->ni_bssid); 781 } 782 783 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 784 ic->ic_opmode == IEEE80211_M_IBSS) { 785 m = ieee80211_beacon_alloc(ni, &sc->sc_bo); 786 if (m == NULL) { 787 device_printf(sc->sc_dev, 788 "could not allocate beacon\n"); 789 error = ENOBUFS; 790 break; 791 } 792 793 ieee80211_ref_node(ni); 794 error = rt2560_tx_bcn(sc, m, ni); 795 if (error != 0) 796 break; 797 } 798 799 /* turn assocation led on */ 800 rt2560_update_led(sc, 1, 0); 801 802 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 803 callout_reset(&sc->rssadapt_ch, hz / 10, 804 rt2560_update_rssadapt, sc); 805 806 rt2560_enable_tsf_sync(sc); 807 } 808 break; 809 case IEEE80211_S_SCAN: 810 case IEEE80211_S_AUTH: 811 case IEEE80211_S_ASSOC: 812 default: 813 break; 814 } 815 816 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 817} 818 819/* 820 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 821 * 93C66). 822 */ 823static uint16_t 824rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 825{ 826 uint32_t tmp; 827 uint16_t val; 828 int n; 829 830 /* clock C once before the first command */ 831 RT2560_EEPROM_CTL(sc, 0); 832 833 RT2560_EEPROM_CTL(sc, RT2560_S); 834 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 835 RT2560_EEPROM_CTL(sc, RT2560_S); 836 837 /* write start bit (1) */ 838 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 839 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 840 841 /* write READ opcode (10) */ 842 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 843 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 844 RT2560_EEPROM_CTL(sc, RT2560_S); 845 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 846 847 /* write address (A5-A0 or A7-A0) */ 848 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 849 for (; n >= 0; n--) { 850 RT2560_EEPROM_CTL(sc, RT2560_S | 851 (((addr >> n) & 1) << RT2560_SHIFT_D)); 852 RT2560_EEPROM_CTL(sc, RT2560_S | 853 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 854 } 855 856 RT2560_EEPROM_CTL(sc, RT2560_S); 857 858 /* read data Q15-Q0 */ 859 val = 0; 860 for (n = 15; n >= 0; n--) { 861 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 862 tmp = RAL_READ(sc, RT2560_CSR21); 863 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 864 RT2560_EEPROM_CTL(sc, RT2560_S); 865 } 866 867 RT2560_EEPROM_CTL(sc, 0); 868 869 /* clear Chip Select and clock C */ 870 RT2560_EEPROM_CTL(sc, RT2560_S); 871 RT2560_EEPROM_CTL(sc, 0); 872 RT2560_EEPROM_CTL(sc, RT2560_C); 873 874 return val; 875} 876 877/* 878 * Some frames were processed by the hardware cipher engine and are ready for 879 * transmission. 880 */ 881static void 882rt2560_encryption_intr(struct rt2560_softc *sc) 883{ 884 struct rt2560_tx_desc *desc; 885 int hw; 886 887 /* retrieve last descriptor index processed by cipher engine */ 888 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 889 hw /= RT2560_TX_DESC_SIZE; 890 891 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 892 BUS_DMASYNC_POSTREAD); 893 894 for (; sc->txq.next_encrypt != hw;) { 895 desc = &sc->txq.desc[sc->txq.next_encrypt]; 896 897 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 898 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 899 break; 900 901 /* for TKIP, swap eiv field to fix a bug in ASIC */ 902 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 903 RT2560_TX_CIPHER_TKIP) 904 desc->eiv = bswap32(desc->eiv); 905 906 /* mark the frame ready for transmission */ 907 desc->flags |= htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 908 909 DPRINTFN(15, ("encryption done idx=%u\n", 910 sc->txq.next_encrypt)); 911 912 sc->txq.next_encrypt = 913 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 914 } 915 916 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 917 BUS_DMASYNC_PREWRITE); 918 919 /* kick Tx */ 920 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 921} 922 923static void 924rt2560_tx_intr(struct rt2560_softc *sc) 925{ 926 struct ieee80211com *ic = &sc->sc_ic; 927 struct ifnet *ifp = ic->ic_ifp; 928 struct rt2560_tx_desc *desc; 929 struct rt2560_tx_data *data; 930 struct rt2560_node *rn; 931 932 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 933 BUS_DMASYNC_POSTREAD); 934 935 for (;;) { 936 desc = &sc->txq.desc[sc->txq.next]; 937 data = &sc->txq.data[sc->txq.next]; 938 939 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 940 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 941 !(le32toh(desc->flags) & RT2560_TX_VALID)) 942 break; 943 944 rn = (struct rt2560_node *)data->ni; 945 946 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 947 case RT2560_TX_SUCCESS: 948 DPRINTFN(10, ("data frame sent successfully\n")); 949 if (data->id.id_node != NULL) { 950 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 951 &data->id); 952 } 953 ifp->if_opackets++; 954 break; 955 956 case RT2560_TX_SUCCESS_RETRY: 957 DPRINTFN(9, ("data frame sent after %u retries\n", 958 (le32toh(desc->flags) >> 5) & 0x7)); 959 ifp->if_opackets++; 960 break; 961 962 case RT2560_TX_FAIL_RETRY: 963 DPRINTFN(9, ("sending data frame failed (too much " 964 "retries)\n")); 965 if (data->id.id_node != NULL) { 966 ral_rssadapt_lower_rate(ic, data->ni, 967 &rn->rssadapt, &data->id); 968 } 969 ifp->if_oerrors++; 970 break; 971 972 case RT2560_TX_FAIL_INVALID: 973 case RT2560_TX_FAIL_OTHER: 974 default: 975 device_printf(sc->sc_dev, "sending data frame failed " 976 "0x%08x\n", le32toh(desc->flags)); 977 ifp->if_oerrors++; 978 } 979 980 bus_dmamap_sync(sc->txq.data_dmat, data->map, 981 BUS_DMASYNC_POSTWRITE); 982 bus_dmamap_unload(sc->txq.data_dmat, data->map); 983 m_freem(data->m); 984 data->m = NULL; 985 ieee80211_free_node(data->ni); 986 data->ni = NULL; 987 988 /* descriptor is no longer valid */ 989 desc->flags &= ~htole32(RT2560_TX_VALID); 990 991 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 992 993 sc->txq.queued--; 994 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 995 } 996 997 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 998 BUS_DMASYNC_PREWRITE); 999 1000 sc->sc_tx_timer = 0; 1001 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1002 rt2560_start(ifp); 1003} 1004 1005static void 1006rt2560_prio_intr(struct rt2560_softc *sc) 1007{ 1008 struct ieee80211com *ic = &sc->sc_ic; 1009 struct ifnet *ifp = ic->ic_ifp; 1010 struct rt2560_tx_desc *desc; 1011 struct rt2560_tx_data *data; 1012 struct ieee80211_node *ni; 1013 struct mbuf *m; 1014 int flags; 1015 1016 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1017 BUS_DMASYNC_POSTREAD); 1018 1019 for (;;) { 1020 desc = &sc->prioq.desc[sc->prioq.next]; 1021 data = &sc->prioq.data[sc->prioq.next]; 1022 1023 flags = le32toh(desc->flags); 1024 if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0) 1025 break; 1026 1027 switch (flags & RT2560_TX_RESULT_MASK) { 1028 case RT2560_TX_SUCCESS: 1029 DPRINTFN(10, ("mgt frame sent successfully\n")); 1030 break; 1031 1032 case RT2560_TX_SUCCESS_RETRY: 1033 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1034 (flags >> 5) & 0x7)); 1035 break; 1036 1037 case RT2560_TX_FAIL_RETRY: 1038 DPRINTFN(9, ("sending mgt frame failed (too much " 1039 "retries)\n")); 1040 break; 1041 1042 case RT2560_TX_FAIL_INVALID: 1043 case RT2560_TX_FAIL_OTHER: 1044 default: 1045 device_printf(sc->sc_dev, "sending mgt frame failed " 1046 "0x%08x\n", flags); 1047 break; 1048 } 1049 1050 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1051 BUS_DMASYNC_POSTWRITE); 1052 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1053 1054 m = data->m; 1055 data->m = NULL; 1056 ni = data->ni; 1057 data->ni = NULL; 1058 1059 /* descriptor is no longer valid */ 1060 desc->flags &= ~htole32(RT2560_TX_VALID); 1061 1062 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1063 1064 sc->prioq.queued--; 1065 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1066 1067 if (m->m_flags & M_TXCB) 1068 ieee80211_process_callback(ni, m, 1069 (flags & RT2560_TX_RESULT_MASK) &~ 1070 (RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY)); 1071 m_freem(m); 1072 ieee80211_free_node(ni); 1073 } 1074 1075 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1076 BUS_DMASYNC_PREWRITE); 1077 1078 sc->sc_tx_timer = 0; 1079 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1080 rt2560_start(ifp); 1081} 1082 1083/* 1084 * Some frames were processed by the hardware cipher engine and are ready for 1085 * transmission to the IEEE802.11 layer. 1086 */ 1087static void 1088rt2560_decryption_intr(struct rt2560_softc *sc) 1089{ 1090 struct ieee80211com *ic = &sc->sc_ic; 1091 struct ifnet *ifp = ic->ic_ifp; 1092 struct rt2560_rx_desc *desc; 1093 struct rt2560_rx_data *data; 1094 bus_addr_t physaddr; 1095 struct ieee80211_frame *wh; 1096 struct ieee80211_node *ni; 1097 struct rt2560_node *rn; 1098 struct mbuf *mnew, *m; 1099 int hw, error; 1100 1101 /* retrieve last decriptor index processed by cipher engine */ 1102 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1103 hw /= RT2560_RX_DESC_SIZE; 1104 1105 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1106 BUS_DMASYNC_POSTREAD); 1107 1108 for (; sc->rxq.cur_decrypt != hw;) { 1109 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1110 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1111 1112 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1113 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1114 break; 1115 1116 if (data->drop) { 1117 ifp->if_ierrors++; 1118 goto skip; 1119 } 1120 1121 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1122 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1123 ifp->if_ierrors++; 1124 goto skip; 1125 } 1126 1127 /* 1128 * Try to allocate a new mbuf for this ring element and load it 1129 * before processing the current mbuf. If the ring element 1130 * cannot be loaded, drop the received packet and reuse the old 1131 * mbuf. In the unlikely case that the old mbuf can't be 1132 * reloaded either, explicitly panic. 1133 */ 1134 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1135 if (mnew == NULL) { 1136 ifp->if_ierrors++; 1137 goto skip; 1138 } 1139 1140 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1141 BUS_DMASYNC_POSTREAD); 1142 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1143 1144 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1145 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1146 &physaddr, 0); 1147 if (error != 0) { 1148 m_freem(mnew); 1149 1150 /* try to reload the old mbuf */ 1151 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1152 mtod(data->m, void *), MCLBYTES, 1153 rt2560_dma_map_addr, &physaddr, 0); 1154 if (error != 0) { 1155 /* very unlikely that it will fail... */ 1156 panic("%s: could not load old rx mbuf", 1157 device_get_name(sc->sc_dev)); 1158 } 1159 ifp->if_ierrors++; 1160 goto skip; 1161 } 1162 1163 /* 1164 * New mbuf successfully loaded, update Rx ring and continue 1165 * processing. 1166 */ 1167 m = data->m; 1168 data->m = mnew; 1169 desc->physaddr = htole32(physaddr); 1170 1171 /* finalize mbuf */ 1172 m->m_pkthdr.rcvif = ifp; 1173 m->m_pkthdr.len = m->m_len = 1174 (le32toh(desc->flags) >> 16) & 0xfff; 1175 1176 if (bpf_peers_present(sc->sc_drvbpf)) { 1177 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1178 uint32_t tsf_lo, tsf_hi; 1179 1180 /* get timestamp (low and high 32 bits) */ 1181 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1182 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1183 1184 tap->wr_tsf = 1185 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1186 tap->wr_flags = 0; 1187 tap->wr_rate = rt2560_rxrate(desc); 1188 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1189 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1190 tap->wr_antenna = sc->rx_ant; 1191 tap->wr_antsignal = RT2560_RSSI(sc, desc->rssi); 1192 1193 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1194 } 1195 1196 sc->sc_flags |= RAL_INPUT_RUNNING; 1197 RAL_UNLOCK(sc); 1198 wh = mtod(m, struct ieee80211_frame *); 1199 ni = ieee80211_find_rxnode(ic, 1200 (struct ieee80211_frame_min *)wh); 1201 1202 /* send the frame to the 802.11 layer */ 1203 ieee80211_input(ic, m, ni, RT2560_RSSI(sc, desc->rssi), 1204 RT2560_NOISE_FLOOR, 0); 1205 1206 /* give rssi to the rate adatation algorithm */ 1207 rn = (struct rt2560_node *)ni; 1208 ral_rssadapt_input(ic, ni, &rn->rssadapt, 1209 RT2560_RSSI(sc, desc->rssi)); 1210 1211 /* node is no longer needed */ 1212 ieee80211_free_node(ni); 1213 1214 RAL_LOCK(sc); 1215 sc->sc_flags &= ~RAL_INPUT_RUNNING; 1216skip: desc->flags = htole32(RT2560_RX_BUSY); 1217 1218 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1219 1220 sc->rxq.cur_decrypt = 1221 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT; 1222 } 1223 1224 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1225 BUS_DMASYNC_PREWRITE); 1226} 1227 1228/* 1229 * Some frames were received. Pass them to the hardware cipher engine before 1230 * sending them to the 802.11 layer. 1231 */ 1232static void 1233rt2560_rx_intr(struct rt2560_softc *sc) 1234{ 1235 struct rt2560_rx_desc *desc; 1236 struct rt2560_rx_data *data; 1237 1238 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1239 BUS_DMASYNC_POSTREAD); 1240 1241 for (;;) { 1242 desc = &sc->rxq.desc[sc->rxq.cur]; 1243 data = &sc->rxq.data[sc->rxq.cur]; 1244 1245 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1246 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1247 break; 1248 1249 data->drop = 0; 1250 1251 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1252 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1253 /* 1254 * This should not happen since we did not request 1255 * to receive those frames when we filled RXCSR0. 1256 */ 1257 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1258 le32toh(desc->flags))); 1259 data->drop = 1; 1260 } 1261 1262 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1263 DPRINTFN(5, ("bad length\n")); 1264 data->drop = 1; 1265 } 1266 1267 /* mark the frame for decryption */ 1268 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1269 1270 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1271 1272 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1273 } 1274 1275 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1276 BUS_DMASYNC_PREWRITE); 1277 1278 /* kick decrypt */ 1279 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1280} 1281 1282static void 1283rt2560_beacon_update(struct ieee80211com *ic, int item) 1284{ 1285 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 1286 struct ieee80211_beacon_offsets *bo = &sc->sc_bo; 1287 1288 setbit(bo->bo_flags, item); 1289} 1290 1291/* 1292 * This function is called periodically in IBSS mode when a new beacon must be 1293 * sent out. 1294 */ 1295static void 1296rt2560_beacon_expire(struct rt2560_softc *sc) 1297{ 1298 struct ieee80211com *ic = &sc->sc_ic; 1299 struct rt2560_tx_data *data; 1300 1301 if (ic->ic_opmode != IEEE80211_M_IBSS && 1302 ic->ic_opmode != IEEE80211_M_HOSTAP) 1303 return; 1304 1305 data = &sc->bcnq.data[sc->bcnq.next]; 1306 /* 1307 * Don't send beacon if bsschan isn't set 1308 */ 1309 if (data->ni == NULL) 1310 return; 1311 1312 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1313 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1314 1315 ieee80211_beacon_update(data->ni, &sc->sc_bo, data->m, 1); 1316 1317 if (bpf_peers_present(ic->ic_rawbpf)) 1318 bpf_mtap(ic->ic_rawbpf, data->m); 1319 1320 rt2560_tx_bcn(sc, data->m, data->ni); 1321 1322 DPRINTFN(15, ("beacon expired\n")); 1323 1324 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1325} 1326 1327/* ARGSUSED */ 1328static void 1329rt2560_wakeup_expire(struct rt2560_softc *sc) 1330{ 1331 DPRINTFN(2, ("wakeup expired\n")); 1332} 1333 1334void 1335rt2560_intr(void *arg) 1336{ 1337 struct rt2560_softc *sc = arg; 1338 struct ifnet *ifp = sc->sc_ifp; 1339 uint32_t r; 1340 1341 RAL_LOCK(sc); 1342 1343 /* disable interrupts */ 1344 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1345 1346 /* don't re-enable interrupts if we're shutting down */ 1347 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1348 RAL_UNLOCK(sc); 1349 return; 1350 } 1351 1352 r = RAL_READ(sc, RT2560_CSR7); 1353 RAL_WRITE(sc, RT2560_CSR7, r); 1354 1355 if (r & RT2560_BEACON_EXPIRE) 1356 rt2560_beacon_expire(sc); 1357 1358 if (r & RT2560_WAKEUP_EXPIRE) 1359 rt2560_wakeup_expire(sc); 1360 1361 if (r & RT2560_ENCRYPTION_DONE) 1362 rt2560_encryption_intr(sc); 1363 1364 if (r & RT2560_TX_DONE) 1365 rt2560_tx_intr(sc); 1366 1367 if (r & RT2560_PRIO_DONE) 1368 rt2560_prio_intr(sc); 1369 1370 if (r & RT2560_DECRYPTION_DONE) 1371 rt2560_decryption_intr(sc); 1372 1373 if (r & RT2560_RX_DONE) 1374 rt2560_rx_intr(sc); 1375 1376 /* re-enable interrupts */ 1377 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1378 1379 RAL_UNLOCK(sc); 1380} 1381 1382/* quickly determine if a given rate is CCK or OFDM */ 1383#define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1384 1385#define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1386#define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1387 1388#define RAL_SIFS 10 /* us */ 1389 1390#define RT2560_TXRX_TURNAROUND 10 /* us */ 1391 1392/* 1393 * This function is only used by the Rx radiotap code. 1394 */ 1395static uint8_t 1396rt2560_rxrate(struct rt2560_rx_desc *desc) 1397{ 1398 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1399 /* reverse function of rt2560_plcp_signal */ 1400 switch (desc->rate) { 1401 case 0xb: return 12; 1402 case 0xf: return 18; 1403 case 0xa: return 24; 1404 case 0xe: return 36; 1405 case 0x9: return 48; 1406 case 0xd: return 72; 1407 case 0x8: return 96; 1408 case 0xc: return 108; 1409 } 1410 } else { 1411 if (desc->rate == 10) 1412 return 2; 1413 if (desc->rate == 20) 1414 return 4; 1415 if (desc->rate == 55) 1416 return 11; 1417 if (desc->rate == 110) 1418 return 22; 1419 } 1420 return 2; /* should not get there */ 1421} 1422 1423/* 1424 * Return the expected ack rate for a frame transmitted at rate `rate'. 1425 * XXX: this should depend on the destination node basic rate set. 1426 */ 1427static int 1428rt2560_ack_rate(struct ieee80211com *ic, int rate) 1429{ 1430 switch (rate) { 1431 /* CCK rates */ 1432 case 2: 1433 return 2; 1434 case 4: 1435 case 11: 1436 case 22: 1437 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1438 1439 /* OFDM rates */ 1440 case 12: 1441 case 18: 1442 return 12; 1443 case 24: 1444 case 36: 1445 return 24; 1446 case 48: 1447 case 72: 1448 case 96: 1449 case 108: 1450 return 48; 1451 } 1452 1453 /* default to 1Mbps */ 1454 return 2; 1455} 1456 1457/* 1458 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1459 * The function automatically determines the operating mode depending on the 1460 * given rate. `flags' indicates whether short preamble is in use or not. 1461 */ 1462static uint16_t 1463rt2560_txtime(int len, int rate, uint32_t flags) 1464{ 1465 uint16_t txtime; 1466 1467 if (RAL_RATE_IS_OFDM(rate)) { 1468 /* IEEE Std 802.11a-1999, pp. 37 */ 1469 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1470 txtime = 16 + 4 + 4 * txtime + 6; 1471 } else { 1472 /* IEEE Std 802.11b-1999, pp. 28 */ 1473 txtime = (16 * len + rate - 1) / rate; 1474 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1475 txtime += 72 + 24; 1476 else 1477 txtime += 144 + 48; 1478 } 1479 1480 return txtime; 1481} 1482 1483static uint8_t 1484rt2560_plcp_signal(int rate) 1485{ 1486 switch (rate) { 1487 /* CCK rates (returned values are device-dependent) */ 1488 case 2: return 0x0; 1489 case 4: return 0x1; 1490 case 11: return 0x2; 1491 case 22: return 0x3; 1492 1493 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1494 case 12: return 0xb; 1495 case 18: return 0xf; 1496 case 24: return 0xa; 1497 case 36: return 0xe; 1498 case 48: return 0x9; 1499 case 72: return 0xd; 1500 case 96: return 0x8; 1501 case 108: return 0xc; 1502 1503 /* unsupported rates (should not get there) */ 1504 default: return 0xff; 1505 } 1506} 1507 1508static void 1509rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1510 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1511{ 1512 struct ieee80211com *ic = &sc->sc_ic; 1513 uint16_t plcp_length; 1514 int remainder; 1515 1516 desc->flags = htole32(flags); 1517 desc->flags |= htole32(len << 16); 1518 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) : 1519 htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 1520 1521 desc->physaddr = htole32(physaddr); 1522 desc->wme = htole16( 1523 RT2560_AIFSN(2) | 1524 RT2560_LOGCWMIN(3) | 1525 RT2560_LOGCWMAX(8)); 1526 1527 /* setup PLCP fields */ 1528 desc->plcp_signal = rt2560_plcp_signal(rate); 1529 desc->plcp_service = 4; 1530 1531 len += IEEE80211_CRC_LEN; 1532 if (RAL_RATE_IS_OFDM(rate)) { 1533 desc->flags |= htole32(RT2560_TX_OFDM); 1534 1535 plcp_length = len & 0xfff; 1536 desc->plcp_length_hi = plcp_length >> 6; 1537 desc->plcp_length_lo = plcp_length & 0x3f; 1538 } else { 1539 plcp_length = (16 * len + rate - 1) / rate; 1540 if (rate == 22) { 1541 remainder = (16 * len) % 22; 1542 if (remainder != 0 && remainder < 7) 1543 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1544 } 1545 desc->plcp_length_hi = plcp_length >> 8; 1546 desc->plcp_length_lo = plcp_length & 0xff; 1547 1548 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1549 desc->plcp_signal |= 0x08; 1550 } 1551} 1552 1553static int 1554rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1555 struct ieee80211_node *ni) 1556{ 1557 struct ieee80211com *ic = &sc->sc_ic; 1558 struct rt2560_tx_desc *desc; 1559 struct rt2560_tx_data *data; 1560 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1561 int nsegs, rate, error; 1562 1563 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1564 data = &sc->bcnq.data[sc->bcnq.cur]; 1565 1566 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1567 1568 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0, 1569 segs, &nsegs, BUS_DMA_NOWAIT); 1570 if (error != 0) { 1571 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1572 error); 1573 m_freem(m0); 1574 return error; 1575 } 1576 1577 if (bpf_peers_present(sc->sc_drvbpf)) { 1578 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1579 1580 tap->wt_flags = 0; 1581 tap->wt_rate = rate; 1582 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1583 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1584 tap->wt_antenna = sc->tx_ant; 1585 1586 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1587 } 1588 1589 data->m = m0; 1590 data->ni = ni; 1591 1592 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1593 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr); 1594 1595 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1596 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1597 1598 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1599 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1600 BUS_DMASYNC_PREWRITE); 1601 1602 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1603 1604 return 0; 1605} 1606 1607static int 1608rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1609 struct ieee80211_node *ni) 1610{ 1611 struct ieee80211com *ic = &sc->sc_ic; 1612 struct rt2560_tx_desc *desc; 1613 struct rt2560_tx_data *data; 1614 struct ieee80211_frame *wh; 1615 struct ieee80211_key *k; 1616 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1617 uint16_t dur; 1618 uint32_t flags = 0; 1619 int nsegs, rate, error; 1620 1621 desc = &sc->prioq.desc[sc->prioq.cur]; 1622 data = &sc->prioq.data[sc->prioq.cur]; 1623 1624 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1625 1626 wh = mtod(m0, struct ieee80211_frame *); 1627 1628 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1629 k = ieee80211_crypto_encap(ic, ni, m0); 1630 if (k == NULL) { 1631 m_freem(m0); 1632 return ENOBUFS; 1633 } 1634 } 1635 1636 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1637 segs, &nsegs, 0); 1638 if (error != 0) { 1639 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1640 error); 1641 m_freem(m0); 1642 return error; 1643 } 1644 1645 if (bpf_peers_present(sc->sc_drvbpf)) { 1646 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1647 1648 tap->wt_flags = 0; 1649 tap->wt_rate = rate; 1650 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1651 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1652 tap->wt_antenna = sc->tx_ant; 1653 1654 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1655 } 1656 1657 data->m = m0; 1658 data->ni = ni; 1659 1660 wh = mtod(m0, struct ieee80211_frame *); 1661 1662 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1663 flags |= RT2560_TX_ACK; 1664 1665 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1666 RAL_SIFS; 1667 *(uint16_t *)wh->i_dur = htole16(dur); 1668 1669 /* tell hardware to add timestamp for probe responses */ 1670 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1671 IEEE80211_FC0_TYPE_MGT && 1672 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1673 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1674 flags |= RT2560_TX_TIMESTAMP; 1675 } 1676 1677 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, 1678 segs->ds_addr); 1679 1680 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1681 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1682 BUS_DMASYNC_PREWRITE); 1683 1684 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1685 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1686 1687 /* kick prio */ 1688 sc->prioq.queued++; 1689 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1690 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1691 1692 return 0; 1693} 1694 1695static int 1696rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0, 1697 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params) 1698{ 1699 struct ieee80211com *ic = &sc->sc_ic; 1700 struct rt2560_tx_desc *desc; 1701 struct rt2560_tx_data *data; 1702 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1703 uint32_t flags; 1704 int nsegs, rate, error; 1705 1706 desc = &sc->prioq.desc[sc->prioq.cur]; 1707 data = &sc->prioq.data[sc->prioq.cur]; 1708 1709 rate = params->ibp_rate0 & IEEE80211_RATE_VAL; 1710 /* XXX validate */ 1711 if (rate == 0) { 1712 m_freem(m0); 1713 return EINVAL; 1714 } 1715 1716 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1717 segs, &nsegs, 0); 1718 if (error != 0) { 1719 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1720 error); 1721 m_freem(m0); 1722 return error; 1723 } 1724 1725 if (bpf_peers_present(sc->sc_drvbpf)) { 1726 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1727 1728 tap->wt_flags = 0; 1729 tap->wt_rate = rate; 1730 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1731 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1732 tap->wt_antenna = sc->tx_ant; 1733 1734 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1735 } 1736 1737 data->m = m0; 1738 data->ni = ni; 1739 1740 flags = 0; 1741 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) 1742 flags |= RT2560_TX_ACK; 1743 1744 /* XXX need to setup descriptor ourself */ 1745 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, 1746 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0, 1747 segs->ds_addr); 1748 1749 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1750 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1751 BUS_DMASYNC_PREWRITE); 1752 1753 DPRINTFN(10, ("sending raw frame len=%u idx=%u rate=%u\n", 1754 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1755 1756 /* kick prio */ 1757 sc->prioq.queued++; 1758 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1759 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1760 1761 return 0; 1762} 1763 1764/* 1765 * Build a RTS control frame. 1766 */ 1767static struct mbuf * 1768rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1769 uint16_t dur) 1770{ 1771 struct ieee80211_frame_rts *rts; 1772 struct mbuf *m; 1773 1774 MGETHDR(m, M_DONTWAIT, MT_DATA); 1775 if (m == NULL) { 1776 sc->sc_ic.ic_stats.is_tx_nobuf++; 1777 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1778 return NULL; 1779 } 1780 1781 rts = mtod(m, struct ieee80211_frame_rts *); 1782 1783 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1784 IEEE80211_FC0_SUBTYPE_RTS; 1785 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1786 *(uint16_t *)rts->i_dur = htole16(dur); 1787 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1788 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1789 1790 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1791 1792 return m; 1793} 1794 1795static int 1796rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1797 struct ieee80211_node *ni) 1798{ 1799 struct ieee80211com *ic = &sc->sc_ic; 1800 struct rt2560_tx_desc *desc; 1801 struct rt2560_tx_data *data; 1802 struct rt2560_node *rn; 1803 struct ieee80211_frame *wh; 1804 struct ieee80211_key *k; 1805 struct mbuf *mnew; 1806 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1807 uint16_t dur; 1808 uint32_t flags = 0; 1809 int nsegs, rate, error; 1810 1811 wh = mtod(m0, struct ieee80211_frame *); 1812 1813 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1814 rate = ic->ic_fixed_rate; 1815 } else { 1816 struct ieee80211_rateset *rs; 1817 1818 rs = &ni->ni_rates; 1819 rn = (struct rt2560_node *)ni; 1820 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1821 m0->m_pkthdr.len, NULL, 0); 1822 rate = rs->rs_rates[ni->ni_txrate]; 1823 } 1824 rate &= IEEE80211_RATE_VAL; 1825 1826 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1827 k = ieee80211_crypto_encap(ic, ni, m0); 1828 if (k == NULL) { 1829 m_freem(m0); 1830 return ENOBUFS; 1831 } 1832 1833 /* packet header may have moved, reset our local pointer */ 1834 wh = mtod(m0, struct ieee80211_frame *); 1835 } 1836 1837 /* 1838 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1839 * for directed frames only when the length of the MPDU is greater 1840 * than the length threshold indicated by [...]" ic_rtsthreshold. 1841 */ 1842 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1843 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1844 struct mbuf *m; 1845 uint16_t dur; 1846 int rtsrate, ackrate; 1847 1848 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1849 ackrate = rt2560_ack_rate(ic, rate); 1850 1851 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1852 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1853 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1854 3 * RAL_SIFS; 1855 1856 m = rt2560_get_rts(sc, wh, dur); 1857 1858 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1859 data = &sc->txq.data[sc->txq.cur_encrypt]; 1860 1861 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1862 m, segs, &nsegs, 0); 1863 if (error != 0) { 1864 device_printf(sc->sc_dev, 1865 "could not map mbuf (error %d)\n", error); 1866 m_freem(m); 1867 m_freem(m0); 1868 return error; 1869 } 1870 1871 /* avoid multiple free() of the same node for each fragment */ 1872 ieee80211_ref_node(ni); 1873 1874 data->m = m; 1875 data->ni = ni; 1876 1877 /* RTS frames are not taken into account for rssadapt */ 1878 data->id.id_node = NULL; 1879 1880 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1881 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, 1882 segs->ds_addr); 1883 1884 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1885 BUS_DMASYNC_PREWRITE); 1886 1887 sc->txq.queued++; 1888 sc->txq.cur_encrypt = 1889 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1890 1891 /* 1892 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1893 * asynchronous data frame shall be transmitted after the CTS 1894 * frame and a SIFS period. 1895 */ 1896 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1897 } 1898 1899 data = &sc->txq.data[sc->txq.cur_encrypt]; 1900 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1901 1902 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0, 1903 segs, &nsegs, 0); 1904 if (error != 0 && error != EFBIG) { 1905 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1906 error); 1907 m_freem(m0); 1908 return error; 1909 } 1910 if (error != 0) { 1911 mnew = m_defrag(m0, M_DONTWAIT); 1912 if (mnew == NULL) { 1913 device_printf(sc->sc_dev, 1914 "could not defragment mbuf\n"); 1915 m_freem(m0); 1916 return ENOBUFS; 1917 } 1918 m0 = mnew; 1919 1920 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1921 m0, segs, &nsegs, 0); 1922 if (error != 0) { 1923 device_printf(sc->sc_dev, 1924 "could not map mbuf (error %d)\n", error); 1925 m_freem(m0); 1926 return error; 1927 } 1928 1929 /* packet header may have moved, reset our local pointer */ 1930 wh = mtod(m0, struct ieee80211_frame *); 1931 } 1932 1933 if (bpf_peers_present(sc->sc_drvbpf)) { 1934 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1935 1936 tap->wt_flags = 0; 1937 tap->wt_rate = rate; 1938 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1939 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1940 tap->wt_antenna = sc->tx_ant; 1941 1942 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1943 } 1944 1945 data->m = m0; 1946 data->ni = ni; 1947 1948 /* remember link conditions for rate adaptation algorithm */ 1949 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1950 data->id.id_len = m0->m_pkthdr.len; 1951 data->id.id_rateidx = ni->ni_txrate; 1952 data->id.id_node = ni; 1953 data->id.id_rssi = ni->ni_rssi; 1954 } else 1955 data->id.id_node = NULL; 1956 1957 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1958 flags |= RT2560_TX_ACK; 1959 1960 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1961 ic->ic_flags) + RAL_SIFS; 1962 *(uint16_t *)wh->i_dur = htole16(dur); 1963 } 1964 1965 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, 1966 segs->ds_addr); 1967 1968 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1969 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1970 BUS_DMASYNC_PREWRITE); 1971 1972 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1973 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1974 1975 /* kick encrypt */ 1976 sc->txq.queued++; 1977 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1978 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 1979 1980 return 0; 1981} 1982 1983static void 1984rt2560_start(struct ifnet *ifp) 1985{ 1986 struct rt2560_softc *sc = ifp->if_softc; 1987 struct ieee80211com *ic = &sc->sc_ic; 1988 struct mbuf *m0; 1989 struct ether_header *eh; 1990 struct ieee80211_node *ni; 1991 1992 RAL_LOCK(sc); 1993 1994 /* prevent management frames from being sent if we're not ready */ 1995 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1996 RAL_UNLOCK(sc); 1997 return; 1998 } 1999 2000 for (;;) { 2001 IF_POLL(&ic->ic_mgtq, m0); 2002 if (m0 != NULL) { 2003 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2004 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2005 break; 2006 } 2007 IF_DEQUEUE(&ic->ic_mgtq, m0); 2008 2009 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 2010 m0->m_pkthdr.rcvif = NULL; 2011 2012 if (bpf_peers_present(ic->ic_rawbpf)) 2013 bpf_mtap(ic->ic_rawbpf, m0); 2014 2015 if (rt2560_tx_mgt(sc, m0, ni) != 0) { 2016 ieee80211_free_node(ni); 2017 break; 2018 } 2019 } else { 2020 if (ic->ic_state != IEEE80211_S_RUN) 2021 break; 2022 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 2023 if (m0 == NULL) 2024 break; 2025 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 2026 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 2027 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2028 break; 2029 } 2030 /* 2031 * Cancel any background scan. 2032 */ 2033 if (ic->ic_flags & IEEE80211_F_SCAN) 2034 ieee80211_cancel_scan(ic); 2035 2036 if (m0->m_len < sizeof (struct ether_header) && 2037 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 2038 continue; 2039 2040 eh = mtod(m0, struct ether_header *); 2041 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2042 if (ni == NULL) { 2043 m_freem(m0); 2044 continue; 2045 } 2046 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 2047 (m0->m_flags & M_PWR_SAV) == 0) { 2048 /* 2049 * Station in power save mode; pass the frame 2050 * to the 802.11 layer and continue. We'll get 2051 * the frame back when the time is right. 2052 */ 2053 ieee80211_pwrsave(ni, m0); 2054 /* 2055 * If we're in power save mode 'cuz of a bg 2056 * scan cancel it so the traffic can flow. 2057 * The packet we just queued will automatically 2058 * get sent when we drop out of power save. 2059 * XXX locking 2060 */ 2061 if (ic->ic_flags & IEEE80211_F_SCAN) 2062 ieee80211_cancel_scan(ic); 2063 ieee80211_free_node(ni); 2064 continue; 2065 2066 } 2067 2068 BPF_MTAP(ifp, m0); 2069 2070 m0 = ieee80211_encap(ic, m0, ni); 2071 if (m0 == NULL) { 2072 ieee80211_free_node(ni); 2073 continue; 2074 } 2075 2076 if (bpf_peers_present(ic->ic_rawbpf)) 2077 bpf_mtap(ic->ic_rawbpf, m0); 2078 2079 if (rt2560_tx_data(sc, m0, ni) != 0) { 2080 ieee80211_free_node(ni); 2081 ifp->if_oerrors++; 2082 break; 2083 } 2084 } 2085 2086 sc->sc_tx_timer = 5; 2087 ic->ic_lastdata = ticks; 2088 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2089 } 2090 2091 RAL_UNLOCK(sc); 2092} 2093 2094static void 2095rt2560_watchdog(void *arg) 2096{ 2097 struct rt2560_softc *sc = arg; 2098 2099 if (sc->sc_tx_timer > 0) { 2100 if (--sc->sc_tx_timer == 0) { 2101 device_printf(sc->sc_dev, "device timeout\n"); 2102 rt2560_init(sc); 2103 sc->sc_ifp->if_oerrors++; 2104 return; 2105 } 2106 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2107 } 2108} 2109 2110/* 2111 * This function allows for fast channel switching in monitor mode (used by 2112 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2113 * generate a new beacon frame. 2114 */ 2115static int 2116rt2560_reset(struct ifnet *ifp) 2117{ 2118 struct rt2560_softc *sc = ifp->if_softc; 2119 struct ieee80211com *ic = &sc->sc_ic; 2120 2121 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2122 return ENETRESET; 2123 2124 rt2560_set_chan(sc, ic->ic_curchan); 2125 2126 return 0; 2127} 2128 2129static int 2130rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2131{ 2132 struct rt2560_softc *sc = ifp->if_softc; 2133 struct ieee80211com *ic = &sc->sc_ic; 2134 int error = 0; 2135 2136 2137 2138 switch (cmd) { 2139 case SIOCSIFFLAGS: 2140 if (ifp->if_flags & IFF_UP) { 2141 RAL_LOCK(sc); 2142 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2143 rt2560_update_promisc(sc); 2144 else 2145 rt2560_init(sc); 2146 RAL_UNLOCK(sc); 2147 } else { 2148 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2149 rt2560_stop(sc); 2150 } 2151 2152 break; 2153 2154 default: 2155 error = ieee80211_ioctl(ic, cmd, data); 2156 } 2157 2158 if (error == ENETRESET) { 2159 if ((ifp->if_flags & IFF_UP) && 2160 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 2161 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2162 rt2560_init(sc); 2163 error = 0; 2164 } 2165 2166 2167 return error; 2168} 2169 2170static void 2171rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2172{ 2173 uint32_t tmp; 2174 int ntries; 2175 2176 for (ntries = 0; ntries < 100; ntries++) { 2177 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2178 break; 2179 DELAY(1); 2180 } 2181 if (ntries == 100) { 2182 device_printf(sc->sc_dev, "could not write to BBP\n"); 2183 return; 2184 } 2185 2186 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2187 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2188 2189 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2190} 2191 2192static uint8_t 2193rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2194{ 2195 uint32_t val; 2196 int ntries; 2197 2198 val = RT2560_BBP_BUSY | reg << 8; 2199 RAL_WRITE(sc, RT2560_BBPCSR, val); 2200 2201 for (ntries = 0; ntries < 100; ntries++) { 2202 val = RAL_READ(sc, RT2560_BBPCSR); 2203 if (!(val & RT2560_BBP_BUSY)) 2204 return val & 0xff; 2205 DELAY(1); 2206 } 2207 2208 device_printf(sc->sc_dev, "could not read from BBP\n"); 2209 return 0; 2210} 2211 2212static void 2213rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2214{ 2215 uint32_t tmp; 2216 int ntries; 2217 2218 for (ntries = 0; ntries < 100; ntries++) { 2219 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2220 break; 2221 DELAY(1); 2222 } 2223 if (ntries == 100) { 2224 device_printf(sc->sc_dev, "could not write to RF\n"); 2225 return; 2226 } 2227 2228 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2229 (reg & 0x3); 2230 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2231 2232 /* remember last written value in sc */ 2233 sc->rf_regs[reg] = val; 2234 2235 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2236} 2237 2238static void 2239rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2240{ 2241 struct ieee80211com *ic = &sc->sc_ic; 2242 uint8_t power, tmp; 2243 u_int i, chan; 2244 2245 chan = ieee80211_chan2ieee(ic, c); 2246 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2247 return; 2248 2249 if (IEEE80211_IS_CHAN_2GHZ(c)) 2250 power = min(sc->txpow[chan - 1], 31); 2251 else 2252 power = 31; 2253 2254 /* adjust txpower using ifconfig settings */ 2255 power -= (100 - ic->ic_txpowlimit) / 8; 2256 2257 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2258 2259 switch (sc->rf_rev) { 2260 case RT2560_RF_2522: 2261 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2262 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2263 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2264 break; 2265 2266 case RT2560_RF_2523: 2267 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2268 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2269 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2270 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2271 break; 2272 2273 case RT2560_RF_2524: 2274 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2275 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2276 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2277 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2278 break; 2279 2280 case RT2560_RF_2525: 2281 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2282 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2283 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2284 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2285 2286 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2287 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2288 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2289 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2290 break; 2291 2292 case RT2560_RF_2525E: 2293 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2294 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2295 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2296 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2297 break; 2298 2299 case RT2560_RF_2526: 2300 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2301 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2302 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2303 2304 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2305 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2306 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2307 break; 2308 2309 /* dual-band RF */ 2310 case RT2560_RF_5222: 2311 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2312 2313 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2314 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2315 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2316 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2317 break; 2318 default: 2319 printf("unknown ral rev=%d\n", sc->rf_rev); 2320 } 2321 2322 if (ic->ic_state != IEEE80211_S_SCAN) { 2323 /* set Japan filter bit for channel 14 */ 2324 tmp = rt2560_bbp_read(sc, 70); 2325 2326 tmp &= ~RT2560_JAPAN_FILTER; 2327 if (chan == 14) 2328 tmp |= RT2560_JAPAN_FILTER; 2329 2330 rt2560_bbp_write(sc, 70, tmp); 2331 2332 /* clear CRC errors */ 2333 RAL_READ(sc, RT2560_CNT0); 2334 } 2335} 2336 2337static void 2338rt2560_set_channel(struct ieee80211com *ic) 2339{ 2340 struct ifnet *ifp = ic->ic_ifp; 2341 struct rt2560_softc *sc = ifp->if_softc; 2342 2343 RAL_LOCK(sc); 2344 rt2560_set_chan(sc, ic->ic_curchan); 2345 RAL_UNLOCK(sc); 2346 2347} 2348 2349#if 0 2350/* 2351 * Disable RF auto-tuning. 2352 */ 2353static void 2354rt2560_disable_rf_tune(struct rt2560_softc *sc) 2355{ 2356 uint32_t tmp; 2357 2358 if (sc->rf_rev != RT2560_RF_2523) { 2359 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2360 rt2560_rf_write(sc, RAL_RF1, tmp); 2361 } 2362 2363 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2364 rt2560_rf_write(sc, RAL_RF3, tmp); 2365 2366 DPRINTFN(2, ("disabling RF autotune\n")); 2367} 2368#endif 2369 2370/* 2371 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2372 * synchronization. 2373 */ 2374static void 2375rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2376{ 2377 struct ieee80211com *ic = &sc->sc_ic; 2378 uint16_t logcwmin, preload; 2379 uint32_t tmp; 2380 2381 /* first, disable TSF synchronization */ 2382 RAL_WRITE(sc, RT2560_CSR14, 0); 2383 2384 tmp = 16 * ic->ic_bss->ni_intval; 2385 RAL_WRITE(sc, RT2560_CSR12, tmp); 2386 2387 RAL_WRITE(sc, RT2560_CSR13, 0); 2388 2389 logcwmin = 5; 2390 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2391 tmp = logcwmin << 16 | preload; 2392 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2393 2394 /* finally, enable TSF synchronization */ 2395 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2396 if (ic->ic_opmode == IEEE80211_M_STA) 2397 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2398 else 2399 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2400 RT2560_ENABLE_BEACON_GENERATOR; 2401 RAL_WRITE(sc, RT2560_CSR14, tmp); 2402 2403 DPRINTF(("enabling TSF synchronization\n")); 2404} 2405 2406static void 2407rt2560_update_plcp(struct rt2560_softc *sc) 2408{ 2409 struct ieee80211com *ic = &sc->sc_ic; 2410 2411 /* no short preamble for 1Mbps */ 2412 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2413 2414 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2415 /* values taken from the reference driver */ 2416 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2417 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2418 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2419 } else { 2420 /* same values as above or'ed 0x8 */ 2421 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2422 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2423 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2424 } 2425 2426 DPRINTF(("updating PLCP for %s preamble\n", 2427 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2428} 2429 2430/* 2431 * This function can be called by ieee80211_set_shortslottime(). Refer to 2432 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2433 */ 2434static void 2435rt2560_update_slot(struct ifnet *ifp) 2436{ 2437 struct rt2560_softc *sc = ifp->if_softc; 2438 struct ieee80211com *ic = &sc->sc_ic; 2439 uint8_t slottime; 2440 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2441 uint32_t tmp; 2442 2443 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2444 2445 /* update the MAC slot boundaries */ 2446 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2447 tx_pifs = tx_sifs + slottime; 2448 tx_difs = tx_sifs + 2 * slottime; 2449 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2450 2451 tmp = RAL_READ(sc, RT2560_CSR11); 2452 tmp = (tmp & ~0x1f00) | slottime << 8; 2453 RAL_WRITE(sc, RT2560_CSR11, tmp); 2454 2455 tmp = tx_pifs << 16 | tx_sifs; 2456 RAL_WRITE(sc, RT2560_CSR18, tmp); 2457 2458 tmp = eifs << 16 | tx_difs; 2459 RAL_WRITE(sc, RT2560_CSR19, tmp); 2460 2461 DPRINTF(("setting slottime to %uus\n", slottime)); 2462} 2463 2464static void 2465rt2560_set_basicrates(struct rt2560_softc *sc) 2466{ 2467 struct ieee80211com *ic = &sc->sc_ic; 2468 2469 /* update basic rate set */ 2470 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2471 /* 11b basic rates: 1, 2Mbps */ 2472 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2473 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2474 /* 11a basic rates: 6, 12, 24Mbps */ 2475 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2476 } else { 2477 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2478 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2479 } 2480} 2481 2482static void 2483rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2484{ 2485 uint32_t tmp; 2486 2487 /* set ON period to 70ms and OFF period to 30ms */ 2488 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2489 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2490} 2491 2492static void 2493rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid) 2494{ 2495 uint32_t tmp; 2496 2497 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2498 RAL_WRITE(sc, RT2560_CSR5, tmp); 2499 2500 tmp = bssid[4] | bssid[5] << 8; 2501 RAL_WRITE(sc, RT2560_CSR6, tmp); 2502 2503 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2504} 2505 2506static void 2507rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2508{ 2509 uint32_t tmp; 2510 2511 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2512 RAL_WRITE(sc, RT2560_CSR3, tmp); 2513 2514 tmp = addr[4] | addr[5] << 8; 2515 RAL_WRITE(sc, RT2560_CSR4, tmp); 2516 2517 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2518} 2519 2520static void 2521rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2522{ 2523 uint32_t tmp; 2524 2525 tmp = RAL_READ(sc, RT2560_CSR3); 2526 addr[0] = tmp & 0xff; 2527 addr[1] = (tmp >> 8) & 0xff; 2528 addr[2] = (tmp >> 16) & 0xff; 2529 addr[3] = (tmp >> 24); 2530 2531 tmp = RAL_READ(sc, RT2560_CSR4); 2532 addr[4] = tmp & 0xff; 2533 addr[5] = (tmp >> 8) & 0xff; 2534} 2535 2536static void 2537rt2560_update_promisc(struct rt2560_softc *sc) 2538{ 2539 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2540 uint32_t tmp; 2541 2542 tmp = RAL_READ(sc, RT2560_RXCSR0); 2543 2544 tmp &= ~RT2560_DROP_NOT_TO_ME; 2545 if (!(ifp->if_flags & IFF_PROMISC)) 2546 tmp |= RT2560_DROP_NOT_TO_ME; 2547 2548 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2549 2550 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2551 "entering" : "leaving")); 2552} 2553 2554static const char * 2555rt2560_get_rf(int rev) 2556{ 2557 switch (rev) { 2558 case RT2560_RF_2522: return "RT2522"; 2559 case RT2560_RF_2523: return "RT2523"; 2560 case RT2560_RF_2524: return "RT2524"; 2561 case RT2560_RF_2525: return "RT2525"; 2562 case RT2560_RF_2525E: return "RT2525e"; 2563 case RT2560_RF_2526: return "RT2526"; 2564 case RT2560_RF_5222: return "RT5222"; 2565 default: return "unknown"; 2566 } 2567} 2568 2569static void 2570rt2560_read_eeprom(struct rt2560_softc *sc) 2571{ 2572 uint16_t val; 2573 int i; 2574 2575 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2576 sc->rf_rev = (val >> 11) & 0x7; 2577 sc->hw_radio = (val >> 10) & 0x1; 2578 sc->led_mode = (val >> 6) & 0x7; 2579 sc->rx_ant = (val >> 4) & 0x3; 2580 sc->tx_ant = (val >> 2) & 0x3; 2581 sc->nb_ant = val & 0x3; 2582 2583 /* read default values for BBP registers */ 2584 for (i = 0; i < 16; i++) { 2585 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2586 sc->bbp_prom[i].reg = val >> 8; 2587 sc->bbp_prom[i].val = val & 0xff; 2588 } 2589 2590 /* read Tx power for all b/g channels */ 2591 for (i = 0; i < 14 / 2; i++) { 2592 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2593 sc->txpow[i * 2] = val >> 8; 2594 sc->txpow[i * 2 + 1] = val & 0xff; 2595 } 2596 2597 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE); 2598 if ((val & 0xff) == 0xff) 2599 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR; 2600 else 2601 sc->rssi_corr = val & 0xff; 2602 DPRINTF(("rssi correction %d, calibrate 0x%02x\n", 2603 sc->rssi_corr, val)); 2604} 2605 2606 2607static void 2608rt2560_scan_start(struct ieee80211com *ic) 2609{ 2610 struct ifnet *ifp = ic->ic_ifp; 2611 struct rt2560_softc *sc = ifp->if_softc; 2612 2613 /* abort TSF synchronization */ 2614 RAL_WRITE(sc, RT2560_CSR14, 0); 2615 rt2560_set_bssid(sc, ifp->if_broadcastaddr); 2616} 2617 2618static void 2619rt2560_scan_end(struct ieee80211com *ic) 2620{ 2621 struct ifnet *ifp = ic->ic_ifp; 2622 struct rt2560_softc *sc = ifp->if_softc; 2623 2624 rt2560_enable_tsf_sync(sc); 2625 /* XXX keep local copy */ 2626 rt2560_set_bssid(sc, ic->ic_bss->ni_bssid); 2627} 2628 2629static int 2630rt2560_bbp_init(struct rt2560_softc *sc) 2631{ 2632#define N(a) (sizeof (a) / sizeof ((a)[0])) 2633 int i, ntries; 2634 2635 /* wait for BBP to be ready */ 2636 for (ntries = 0; ntries < 100; ntries++) { 2637 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2638 break; 2639 DELAY(1); 2640 } 2641 if (ntries == 100) { 2642 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2643 return EIO; 2644 } 2645 2646 /* initialize BBP registers to default values */ 2647 for (i = 0; i < N(rt2560_def_bbp); i++) { 2648 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2649 rt2560_def_bbp[i].val); 2650 } 2651#if 0 2652 /* initialize BBP registers to values stored in EEPROM */ 2653 for (i = 0; i < 16; i++) { 2654 if (sc->bbp_prom[i].reg == 0xff) 2655 continue; 2656 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2657 } 2658#endif 2659 2660 return 0; 2661#undef N 2662} 2663 2664static void 2665rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2666{ 2667 uint32_t tmp; 2668 uint8_t tx; 2669 2670 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2671 if (antenna == 1) 2672 tx |= RT2560_BBP_ANTA; 2673 else if (antenna == 2) 2674 tx |= RT2560_BBP_ANTB; 2675 else 2676 tx |= RT2560_BBP_DIVERSITY; 2677 2678 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2679 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2680 sc->rf_rev == RT2560_RF_5222) 2681 tx |= RT2560_BBP_FLIPIQ; 2682 2683 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2684 2685 /* update values for CCK and OFDM in BBPCSR1 */ 2686 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2687 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2688 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2689} 2690 2691static void 2692rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2693{ 2694 uint8_t rx; 2695 2696 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2697 if (antenna == 1) 2698 rx |= RT2560_BBP_ANTA; 2699 else if (antenna == 2) 2700 rx |= RT2560_BBP_ANTB; 2701 else 2702 rx |= RT2560_BBP_DIVERSITY; 2703 2704 /* need to force no I/Q flip for RF 2525e and 2526 */ 2705 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2706 rx &= ~RT2560_BBP_FLIPIQ; 2707 2708 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2709} 2710 2711static void 2712rt2560_init(void *priv) 2713{ 2714#define N(a) (sizeof (a) / sizeof ((a)[0])) 2715 struct rt2560_softc *sc = priv; 2716 struct ieee80211com *ic = &sc->sc_ic; 2717 struct ifnet *ifp = ic->ic_ifp; 2718 uint32_t tmp; 2719 int i; 2720 2721 2722 2723 rt2560_stop(sc); 2724 2725 RAL_LOCK(sc); 2726 /* setup tx rings */ 2727 tmp = RT2560_PRIO_RING_COUNT << 24 | 2728 RT2560_ATIM_RING_COUNT << 16 | 2729 RT2560_TX_RING_COUNT << 8 | 2730 RT2560_TX_DESC_SIZE; 2731 2732 /* rings must be initialized in this exact order */ 2733 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2734 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2735 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2736 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2737 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2738 2739 /* setup rx ring */ 2740 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2741 2742 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2743 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2744 2745 /* initialize MAC registers to default values */ 2746 for (i = 0; i < N(rt2560_def_mac); i++) 2747 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2748 2749 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2750 rt2560_set_macaddr(sc, ic->ic_myaddr); 2751 2752 /* set basic rate set (will be updated later) */ 2753 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2754 2755 rt2560_set_txantenna(sc, sc->tx_ant); 2756 rt2560_set_rxantenna(sc, sc->rx_ant); 2757 rt2560_update_slot(ifp); 2758 rt2560_update_plcp(sc); 2759 rt2560_update_led(sc, 0, 0); 2760 2761 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2762 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2763 2764 if (rt2560_bbp_init(sc) != 0) { 2765 rt2560_stop(sc); 2766 RAL_UNLOCK(sc); 2767 return; 2768 } 2769 2770 /* set default BSS channel */ 2771 rt2560_set_chan(sc, ic->ic_curchan); 2772 2773 /* kick Rx */ 2774 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2775 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2776 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2777 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2778 tmp |= RT2560_DROP_TODS; 2779 if (!(ifp->if_flags & IFF_PROMISC)) 2780 tmp |= RT2560_DROP_NOT_TO_ME; 2781 } 2782 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2783 2784 /* clear old FCS and Rx FIFO errors */ 2785 RAL_READ(sc, RT2560_CNT0); 2786 RAL_READ(sc, RT2560_CNT4); 2787 2788 /* clear any pending interrupts */ 2789 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2790 2791 /* enable interrupts */ 2792 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2793 2794 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2795 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2796 2797 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2798 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2799 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2800 } else 2801 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2802 2803 RAL_UNLOCK(sc); 2804#undef N 2805} 2806 2807void 2808rt2560_stop(void *arg) 2809{ 2810 struct rt2560_softc *sc = arg; 2811 struct ieee80211com *ic = &sc->sc_ic; 2812 struct ifnet *ifp = ic->ic_ifp; 2813 volatile int *flags = &sc->sc_flags; 2814 2815 while (*flags & RAL_INPUT_RUNNING) { 2816 tsleep(sc, 0, "ralrunning", hz/10); 2817 } 2818 2819 RAL_LOCK(sc); 2820 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 2821 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2822 sc->sc_tx_timer = 0; 2823 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2824 2825 /* abort Tx */ 2826 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2827 2828 /* disable Rx */ 2829 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2830 2831 /* reset ASIC (imply reset BBP) */ 2832 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2833 RAL_WRITE(sc, RT2560_CSR1, 0); 2834 2835 /* disable interrupts */ 2836 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2837 2838 /* reset Tx and Rx rings */ 2839 rt2560_reset_tx_ring(sc, &sc->txq); 2840 rt2560_reset_tx_ring(sc, &sc->atimq); 2841 rt2560_reset_tx_ring(sc, &sc->prioq); 2842 rt2560_reset_tx_ring(sc, &sc->bcnq); 2843 rt2560_reset_rx_ring(sc, &sc->rxq); 2844 } 2845 RAL_UNLOCK(sc); 2846} 2847 2848static int 2849rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2850 const struct ieee80211_bpf_params *params) 2851{ 2852 struct ieee80211com *ic = ni->ni_ic; 2853 struct ifnet *ifp = ic->ic_ifp; 2854 struct rt2560_softc *sc = ifp->if_softc; 2855 2856 RAL_LOCK(sc); 2857 2858 /* prevent management frames from being sent if we're not ready */ 2859 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2860 RAL_UNLOCK(sc); 2861 m_freem(m); 2862 ieee80211_free_node(ni); 2863 return ENETDOWN; 2864 } 2865 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2866 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2867 RAL_UNLOCK(sc); 2868 m_freem(m); 2869 ieee80211_free_node(ni); 2870 return ENOBUFS; /* XXX */ 2871 } 2872 2873 if (bpf_peers_present(ic->ic_rawbpf)) 2874 bpf_mtap(ic->ic_rawbpf, m); 2875 2876 ifp->if_opackets++; 2877 2878 if (params == NULL) { 2879 /* 2880 * Legacy path; interpret frame contents to decide 2881 * precisely how to send the frame. 2882 */ 2883 if (rt2560_tx_mgt(sc, m, ni) != 0) 2884 goto bad; 2885 } else { 2886 /* 2887 * Caller supplied explicit parameters to use in 2888 * sending the frame. 2889 */ 2890 if (rt2560_tx_raw(sc, m, ni, params)) 2891 goto bad; 2892 } 2893 sc->sc_tx_timer = 5; 2894 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2895 2896 RAL_UNLOCK(sc); 2897 2898 return 0; 2899bad: 2900 ifp->if_oerrors++; 2901 ieee80211_free_node(ni); 2902 RAL_UNLOCK(sc); 2903 return EIO; /* XXX */ 2904} 2905 2906