rt2560.c revision 172058
1128032Stjr/* $FreeBSD: head/sys/dev/ral/rt2560.c 172058 2007-09-05 21:31:32Z sam $ */ 2102050Stjr 3102050Stjr/*- 4102050Stjr * Copyright (c) 2005, 2006 5102050Stjr * Damien Bergamini <damien.bergamini@free.fr> 6102050Stjr * 7102050Stjr * Permission to use, copy, modify, and distribute this software for any 8102050Stjr * purpose with or without fee is hereby granted, provided that the above 9102050Stjr * copyright notice and this permission notice appear in all copies. 10102050Stjr * 11102050Stjr * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12102050Stjr * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13102050Stjr * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14102050Stjr * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15102050Stjr * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16102050Stjr * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17102050Stjr * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18102050Stjr */ 19102050Stjr 20102050Stjr#include <sys/cdefs.h> 21102050Stjr__FBSDID("$FreeBSD: head/sys/dev/ral/rt2560.c 172058 2007-09-05 21:31:32Z sam $"); 22102050Stjr 23102050Stjr/*- 24102050Stjr * Ralink Technology RT2560 chipset driver 25102050Stjr * http://www.ralinktech.com/ 26107392Sru */ 27132497Stjr 28102050Stjr#include <sys/param.h> 29102050Stjr#include <sys/sysctl.h> 30102050Stjr#include <sys/sockio.h> 31132497Stjr#include <sys/mbuf.h> 32132497Stjr#include <sys/kernel.h> 33102050Stjr#include <sys/socket.h> 34102050Stjr#include <sys/systm.h> 35102050Stjr#include <sys/malloc.h> 36102050Stjr#include <sys/lock.h> 37102050Stjr#include <sys/mutex.h> 38102050Stjr#include <sys/module.h> 39107392Sru#include <sys/bus.h> 40107392Sru#include <sys/endian.h> 41107392Sru 42107392Sru#include <machine/bus.h> 43132497Stjr#include <machine/resource.h> 44132497Stjr#include <sys/rman.h> 45132497Stjr 46132497Stjr#include <net/bpf.h> 47132497Stjr#include <net/if.h> 48102050Stjr#include <net/if_arp.h> 49102050Stjr#include <net/ethernet.h> 50102050Stjr#include <net/if_dl.h> 51102050Stjr#include <net/if_media.h> 52102050Stjr#include <net/if_types.h> 53102050Stjr 54102050Stjr#include <net80211/ieee80211_var.h> 55102050Stjr#include <net80211/ieee80211_radiotap.h> 56102050Stjr#include <net80211/ieee80211_regdomain.h> 57102050Stjr 58102050Stjr#include <netinet/in.h> 59102050Stjr#include <netinet/in_systm.h> 60102050Stjr#include <netinet/in_var.h> 61102050Stjr#include <netinet/ip.h> 62102050Stjr#include <netinet/if_ether.h> 63102050Stjr 64102050Stjr#include <dev/ral/if_ralrate.h> 65102050Stjr#include <dev/ral/rt2560reg.h> 66102050Stjr#include <dev/ral/rt2560var.h> 67102050Stjr 68102050Stjr#define RT2560_RSSI(sc, rssi) \ 69102050Stjr ((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ? \ 70102050Stjr ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0) 71102050Stjr 72102050Stjr#ifdef RAL_DEBUG 73102050Stjr#define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 74102050Stjr#define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 75107392Sruextern int ral_debug; 76102050Stjr#else 77102050Stjr#define DPRINTF(x) 78102050Stjr#define DPRINTFN(n, x) 79102050Stjr#endif 80107392Sru 81102050Stjrstatic void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 82102050Stjr int); 83102050Stjrstatic int rt2560_alloc_tx_ring(struct rt2560_softc *, 84102050Stjr struct rt2560_tx_ring *, int); 85102050Stjrstatic void rt2560_reset_tx_ring(struct rt2560_softc *, 86102050Stjr struct rt2560_tx_ring *); 87102050Stjrstatic void rt2560_free_tx_ring(struct rt2560_softc *, 88107392Sru struct rt2560_tx_ring *); 89128032Stjrstatic int rt2560_alloc_rx_ring(struct rt2560_softc *, 90128032Stjr struct rt2560_rx_ring *, int); 91132497Stjrstatic void rt2560_reset_rx_ring(struct rt2560_softc *, 92132497Stjr struct rt2560_rx_ring *); 93132497Stjrstatic void rt2560_free_rx_ring(struct rt2560_softc *, 94132497Stjr struct rt2560_rx_ring *); 95132497Stjrstatic struct ieee80211_node *rt2560_node_alloc( 96132497Stjr struct ieee80211_node_table *); 97132497Stjrstatic int rt2560_media_change(struct ifnet *); 98132497Stjrstatic void rt2560_iter_func(void *, struct ieee80211_node *); 99132497Stjrstatic void rt2560_update_rssadapt(void *); 100102050Stjrstatic int rt2560_newstate(struct ieee80211com *, 101102050Stjr enum ieee80211_state, int); 102102050Stjrstatic uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 103132497Stjrstatic void rt2560_encryption_intr(struct rt2560_softc *); 104132497Stjrstatic void rt2560_tx_intr(struct rt2560_softc *); 105132497Stjrstatic void rt2560_prio_intr(struct rt2560_softc *); 106102050Stjrstatic void rt2560_decryption_intr(struct rt2560_softc *); 107102050Stjrstatic void rt2560_rx_intr(struct rt2560_softc *); 108102050Stjrstatic void rt2560_beacon_expire(struct rt2560_softc *); 109107392Srustatic void rt2560_wakeup_expire(struct rt2560_softc *); 110102050Stjrstatic uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 111102050Stjrstatic int rt2560_ack_rate(struct ieee80211com *, int); 112102050Stjrstatic void rt2560_scan_start(struct ieee80211com *); 113132497Stjrstatic void rt2560_scan_end(struct ieee80211com *); 114132497Stjrstatic void rt2560_set_channel(struct ieee80211com *); 115132497Stjrstatic uint16_t rt2560_txtime(int, int, uint32_t); 116102050Stjrstatic uint8_t rt2560_plcp_signal(int); 117102050Stjrstatic void rt2560_setup_tx_desc(struct rt2560_softc *, 118102050Stjr struct rt2560_tx_desc *, uint32_t, int, int, int, 119128032Stjr bus_addr_t); 120128032Stjrstatic int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 121102050Stjr struct ieee80211_node *); 122102050Stjrstatic int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 123102050Stjr struct ieee80211_node *); 124107392Srustatic struct mbuf *rt2560_get_rts(struct rt2560_softc *, 125107392Sru struct ieee80211_frame *, uint16_t); 126102050Stjrstatic int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 127102050Stjr struct ieee80211_node *); 128102050Stjrstatic void rt2560_start(struct ifnet *); 129102050Stjrstatic void rt2560_watchdog(void *); 130102050Stjrstatic int rt2560_reset(struct ifnet *); 131132497Stjrstatic int rt2560_ioctl(struct ifnet *, u_long, caddr_t); 132132497Stjrstatic void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 133132497Stjr uint8_t); 134132497Stjrstatic uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 135static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 136 uint32_t); 137static void rt2560_set_chan(struct rt2560_softc *, 138 struct ieee80211_channel *); 139#if 0 140static void rt2560_disable_rf_tune(struct rt2560_softc *); 141#endif 142static void rt2560_enable_tsf_sync(struct rt2560_softc *); 143static void rt2560_update_plcp(struct rt2560_softc *); 144static void rt2560_update_slot(struct ifnet *); 145static void rt2560_set_basicrates(struct rt2560_softc *); 146static void rt2560_update_led(struct rt2560_softc *, int, int); 147static void rt2560_set_bssid(struct rt2560_softc *, const uint8_t *); 148static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 149static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 150static void rt2560_update_promisc(struct rt2560_softc *); 151static const char *rt2560_get_rf(int); 152static void rt2560_read_eeprom(struct rt2560_softc *); 153static int rt2560_bbp_init(struct rt2560_softc *); 154static void rt2560_set_txantenna(struct rt2560_softc *, int); 155static void rt2560_set_rxantenna(struct rt2560_softc *, int); 156static void rt2560_init(void *); 157static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *, 158 const struct ieee80211_bpf_params *); 159 160static const struct { 161 uint32_t reg; 162 uint32_t val; 163} rt2560_def_mac[] = { 164 RT2560_DEF_MAC 165}; 166 167static const struct { 168 uint8_t reg; 169 uint8_t val; 170} rt2560_def_bbp[] = { 171 RT2560_DEF_BBP 172}; 173 174static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 175static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 176static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 177static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 178static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 179static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 180static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 181static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 182 183static const struct { 184 uint8_t chan; 185 uint32_t r1, r2, r4; 186} rt2560_rf5222[] = { 187 RT2560_RF5222 188}; 189 190int 191rt2560_attach(device_t dev, int id) 192{ 193 struct rt2560_softc *sc = device_get_softc(dev); 194 struct ieee80211com *ic = &sc->sc_ic; 195 struct ifnet *ifp; 196 int error, bands; 197 198 sc->sc_dev = dev; 199 200 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 201 MTX_DEF | MTX_RECURSE); 202 203 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0); 204 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 205 206 /* retrieve RT2560 rev. no */ 207 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 208 209 /* retrieve MAC address */ 210 rt2560_get_macaddr(sc, ic->ic_myaddr); 211 212 /* retrieve RF rev. no and various other things from EEPROM */ 213 rt2560_read_eeprom(sc); 214 215 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 216 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 217 218 /* 219 * Allocate Tx and Rx rings. 220 */ 221 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 222 if (error != 0) { 223 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 224 goto fail1; 225 } 226 227 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 228 if (error != 0) { 229 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 230 goto fail2; 231 } 232 233 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 234 if (error != 0) { 235 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 236 goto fail3; 237 } 238 239 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 240 if (error != 0) { 241 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 242 goto fail4; 243 } 244 245 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 246 if (error != 0) { 247 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 248 goto fail5; 249 } 250 251 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 252 if (ifp == NULL) { 253 device_printf(sc->sc_dev, "can not if_alloc()\n"); 254 goto fail6; 255 } 256 257 ifp->if_softc = sc; 258 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 259 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 260 ifp->if_init = rt2560_init; 261 ifp->if_ioctl = rt2560_ioctl; 262 ifp->if_start = rt2560_start; 263 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 264 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 265 IFQ_SET_READY(&ifp->if_snd); 266 267 ic->ic_ifp = ifp; 268 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 269 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 270 ic->ic_state = IEEE80211_S_INIT; 271 272 /* set device capabilities */ 273 ic->ic_caps = 274 IEEE80211_C_IBSS | /* IBSS mode supported */ 275 IEEE80211_C_MONITOR | /* monitor mode supported */ 276 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 277 IEEE80211_C_TXPMGT | /* tx power management */ 278 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 279 IEEE80211_C_SHSLOT | /* short slot time supported */ 280 IEEE80211_C_BGSCAN | /* bg scanning support */ 281 IEEE80211_C_WPA; /* 802.11i */ 282 283 bands = 0; 284 setbit(&bands, IEEE80211_MODE_11B); 285 setbit(&bands, IEEE80211_MODE_11G); 286 if (sc->rf_rev == RT2560_RF_5222) 287 setbit(&bands, IEEE80211_MODE_11A); 288 ieee80211_init_channels(ic, 0, CTRY_DEFAULT, bands, 0, 1); 289 290 ieee80211_ifattach(ic); 291 ic->ic_scan_start = rt2560_scan_start; 292 ic->ic_scan_end = rt2560_scan_end; 293 ic->ic_set_channel = rt2560_set_channel; 294 ic->ic_node_alloc = rt2560_node_alloc; 295 ic->ic_updateslot = rt2560_update_slot; 296 ic->ic_reset = rt2560_reset; 297 /* enable s/w bmiss handling in sta mode */ 298 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 299 300 /* override state transition machine */ 301 sc->sc_newstate = ic->ic_newstate; 302 ic->ic_newstate = rt2560_newstate; 303 ic->ic_raw_xmit = rt2560_raw_xmit; 304 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 305 306 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 307 sizeof (struct ieee80211_frame) + sizeof (sc->sc_txtap), 308 &sc->sc_drvbpf); 309 310 sc->sc_rxtap_len = sizeof sc->sc_rxtap; 311 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 312 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 313 314 sc->sc_txtap_len = sizeof sc->sc_txtap; 315 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 316 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 317 318 /* 319 * Add a few sysctl knobs. 320 */ 321 sc->dwelltime = 200; 322 323 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 324 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 325 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 326 327 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 328 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 329 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 330 331 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 332 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 333 CTLFLAG_RW, &sc->dwelltime, 0, 334 "channel dwell time (ms) for AP/station scanning"); 335 336 if (bootverbose) 337 ieee80211_announce(ic); 338 339 return 0; 340 341fail6: rt2560_free_rx_ring(sc, &sc->rxq); 342fail5: rt2560_free_tx_ring(sc, &sc->bcnq); 343fail4: rt2560_free_tx_ring(sc, &sc->prioq); 344fail3: rt2560_free_tx_ring(sc, &sc->atimq); 345fail2: rt2560_free_tx_ring(sc, &sc->txq); 346fail1: mtx_destroy(&sc->sc_mtx); 347 348 return ENXIO; 349} 350 351int 352rt2560_detach(void *xsc) 353{ 354 struct rt2560_softc *sc = xsc; 355 struct ieee80211com *ic = &sc->sc_ic; 356 struct ifnet *ifp = ic->ic_ifp; 357 358 rt2560_stop(sc); 359 callout_stop(&sc->watchdog_ch); 360 callout_stop(&sc->rssadapt_ch); 361 362 bpfdetach(ifp); 363 ieee80211_ifdetach(ic); 364 365 rt2560_free_tx_ring(sc, &sc->txq); 366 rt2560_free_tx_ring(sc, &sc->atimq); 367 rt2560_free_tx_ring(sc, &sc->prioq); 368 rt2560_free_tx_ring(sc, &sc->bcnq); 369 rt2560_free_rx_ring(sc, &sc->rxq); 370 371 if_free(ifp); 372 373 mtx_destroy(&sc->sc_mtx); 374 375 return 0; 376} 377 378void 379rt2560_resume(void *xsc) 380{ 381 struct rt2560_softc *sc = xsc; 382 struct ifnet *ifp = sc->sc_ic.ic_ifp; 383 384 if (ifp->if_flags & IFF_UP) { 385 ifp->if_init(ifp->if_softc); 386 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 387 ifp->if_start(ifp); 388 } 389} 390 391static void 392rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 393{ 394 if (error != 0) 395 return; 396 397 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 398 399 *(bus_addr_t *)arg = segs[0].ds_addr; 400} 401 402static int 403rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 404 int count) 405{ 406 int i, error; 407 408 ring->count = count; 409 ring->queued = 0; 410 ring->cur = ring->next = 0; 411 ring->cur_encrypt = ring->next_encrypt = 0; 412 413 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 414 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 415 count * RT2560_TX_DESC_SIZE, 1, count * RT2560_TX_DESC_SIZE, 416 0, NULL, NULL, &ring->desc_dmat); 417 if (error != 0) { 418 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 419 goto fail; 420 } 421 422 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 423 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 424 if (error != 0) { 425 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 426 goto fail; 427 } 428 429 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 430 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 431 0); 432 if (error != 0) { 433 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 434 goto fail; 435 } 436 437 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 438 M_NOWAIT | M_ZERO); 439 if (ring->data == NULL) { 440 device_printf(sc->sc_dev, "could not allocate soft data\n"); 441 error = ENOMEM; 442 goto fail; 443 } 444 445 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 446 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 447 MCLBYTES, RT2560_MAX_SCATTER, MCLBYTES, 0, NULL, NULL, 448 &ring->data_dmat); 449 if (error != 0) { 450 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 451 goto fail; 452 } 453 454 for (i = 0; i < count; i++) { 455 error = bus_dmamap_create(ring->data_dmat, 0, 456 &ring->data[i].map); 457 if (error != 0) { 458 device_printf(sc->sc_dev, "could not create DMA map\n"); 459 goto fail; 460 } 461 } 462 463 return 0; 464 465fail: rt2560_free_tx_ring(sc, ring); 466 return error; 467} 468 469static void 470rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 471{ 472 struct rt2560_tx_desc *desc; 473 struct rt2560_tx_data *data; 474 int i; 475 476 for (i = 0; i < ring->count; i++) { 477 desc = &ring->desc[i]; 478 data = &ring->data[i]; 479 480 if (data->m != NULL) { 481 bus_dmamap_sync(ring->data_dmat, data->map, 482 BUS_DMASYNC_POSTWRITE); 483 bus_dmamap_unload(ring->data_dmat, data->map); 484 m_freem(data->m); 485 data->m = NULL; 486 } 487 488 if (data->ni != NULL) { 489 ieee80211_free_node(data->ni); 490 data->ni = NULL; 491 } 492 493 desc->flags = 0; 494 } 495 496 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 497 498 ring->queued = 0; 499 ring->cur = ring->next = 0; 500 ring->cur_encrypt = ring->next_encrypt = 0; 501} 502 503static void 504rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 505{ 506 struct rt2560_tx_data *data; 507 int i; 508 509 if (ring->desc != NULL) { 510 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 511 BUS_DMASYNC_POSTWRITE); 512 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 513 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 514 } 515 516 if (ring->desc_dmat != NULL) 517 bus_dma_tag_destroy(ring->desc_dmat); 518 519 if (ring->data != NULL) { 520 for (i = 0; i < ring->count; i++) { 521 data = &ring->data[i]; 522 523 if (data->m != NULL) { 524 bus_dmamap_sync(ring->data_dmat, data->map, 525 BUS_DMASYNC_POSTWRITE); 526 bus_dmamap_unload(ring->data_dmat, data->map); 527 m_freem(data->m); 528 } 529 530 if (data->ni != NULL) 531 ieee80211_free_node(data->ni); 532 533 if (data->map != NULL) 534 bus_dmamap_destroy(ring->data_dmat, data->map); 535 } 536 537 free(ring->data, M_DEVBUF); 538 } 539 540 if (ring->data_dmat != NULL) 541 bus_dma_tag_destroy(ring->data_dmat); 542} 543 544static int 545rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 546 int count) 547{ 548 struct rt2560_rx_desc *desc; 549 struct rt2560_rx_data *data; 550 bus_addr_t physaddr; 551 int i, error; 552 553 ring->count = count; 554 ring->cur = ring->next = 0; 555 ring->cur_decrypt = 0; 556 557 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0, 558 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, 559 count * RT2560_RX_DESC_SIZE, 1, count * RT2560_RX_DESC_SIZE, 560 0, NULL, NULL, &ring->desc_dmat); 561 if (error != 0) { 562 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 563 goto fail; 564 } 565 566 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 567 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 568 if (error != 0) { 569 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 570 goto fail; 571 } 572 573 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 574 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 575 0); 576 if (error != 0) { 577 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 578 goto fail; 579 } 580 581 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 582 M_NOWAIT | M_ZERO); 583 if (ring->data == NULL) { 584 device_printf(sc->sc_dev, "could not allocate soft data\n"); 585 error = ENOMEM; 586 goto fail; 587 } 588 589 /* 590 * Pre-allocate Rx buffers and populate Rx ring. 591 */ 592 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 593 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 594 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 595 if (error != 0) { 596 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 597 goto fail; 598 } 599 600 for (i = 0; i < count; i++) { 601 desc = &sc->rxq.desc[i]; 602 data = &sc->rxq.data[i]; 603 604 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 605 if (error != 0) { 606 device_printf(sc->sc_dev, "could not create DMA map\n"); 607 goto fail; 608 } 609 610 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 611 if (data->m == NULL) { 612 device_printf(sc->sc_dev, 613 "could not allocate rx mbuf\n"); 614 error = ENOMEM; 615 goto fail; 616 } 617 618 error = bus_dmamap_load(ring->data_dmat, data->map, 619 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 620 &physaddr, 0); 621 if (error != 0) { 622 device_printf(sc->sc_dev, 623 "could not load rx buf DMA map"); 624 goto fail; 625 } 626 627 desc->flags = htole32(RT2560_RX_BUSY); 628 desc->physaddr = htole32(physaddr); 629 } 630 631 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 632 633 return 0; 634 635fail: rt2560_free_rx_ring(sc, ring); 636 return error; 637} 638 639static void 640rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 641{ 642 int i; 643 644 for (i = 0; i < ring->count; i++) { 645 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 646 ring->data[i].drop = 0; 647 } 648 649 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 650 651 ring->cur = ring->next = 0; 652 ring->cur_decrypt = 0; 653} 654 655static void 656rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 657{ 658 struct rt2560_rx_data *data; 659 int i; 660 661 if (ring->desc != NULL) { 662 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 663 BUS_DMASYNC_POSTWRITE); 664 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 665 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 666 } 667 668 if (ring->desc_dmat != NULL) 669 bus_dma_tag_destroy(ring->desc_dmat); 670 671 if (ring->data != NULL) { 672 for (i = 0; i < ring->count; i++) { 673 data = &ring->data[i]; 674 675 if (data->m != NULL) { 676 bus_dmamap_sync(ring->data_dmat, data->map, 677 BUS_DMASYNC_POSTREAD); 678 bus_dmamap_unload(ring->data_dmat, data->map); 679 m_freem(data->m); 680 } 681 682 if (data->map != NULL) 683 bus_dmamap_destroy(ring->data_dmat, data->map); 684 } 685 686 free(ring->data, M_DEVBUF); 687 } 688 689 if (ring->data_dmat != NULL) 690 bus_dma_tag_destroy(ring->data_dmat); 691} 692 693static struct ieee80211_node * 694rt2560_node_alloc(struct ieee80211_node_table *nt) 695{ 696 struct rt2560_node *rn; 697 698 rn = malloc(sizeof (struct rt2560_node), M_80211_NODE, 699 M_NOWAIT | M_ZERO); 700 701 return (rn != NULL) ? &rn->ni : NULL; 702} 703 704static int 705rt2560_media_change(struct ifnet *ifp) 706{ 707 struct rt2560_softc *sc = ifp->if_softc; 708 int error; 709 710 error = ieee80211_media_change(ifp); 711 712 if (error == ENETRESET) { 713 if ((ifp->if_flags & IFF_UP) && 714 (ifp->if_drv_flags & IFF_DRV_RUNNING)) 715 rt2560_init(sc); 716 } 717 return error; 718} 719 720/* 721 * This function is called for each node present in the node station table. 722 */ 723static void 724rt2560_iter_func(void *arg, struct ieee80211_node *ni) 725{ 726 struct rt2560_node *rn = (struct rt2560_node *)ni; 727 728 ral_rssadapt_updatestats(&rn->rssadapt); 729} 730 731/* 732 * This function is called periodically (every 100ms) in RUN state to update 733 * the rate adaptation statistics. 734 */ 735static void 736rt2560_update_rssadapt(void *arg) 737{ 738 struct rt2560_softc *sc = arg; 739 struct ieee80211com *ic = &sc->sc_ic; 740 741 RAL_LOCK(sc); 742 743 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 744 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 745 746 RAL_UNLOCK(sc); 747} 748 749static int 750rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 751{ 752 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 753 enum ieee80211_state ostate; 754 struct ieee80211_node *ni; 755 struct mbuf *m; 756 int error = 0; 757 758 ostate = ic->ic_state; 759 760 switch (nstate) { 761 case IEEE80211_S_INIT: 762 callout_stop(&sc->rssadapt_ch); 763 764 if (ostate == IEEE80211_S_RUN) { 765 /* abort TSF synchronization */ 766 RAL_WRITE(sc, RT2560_CSR14, 0); 767 768 /* turn association led off */ 769 rt2560_update_led(sc, 0, 0); 770 } 771 break; 772 case IEEE80211_S_RUN: 773 ni = ic->ic_bss; 774 775 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 776 rt2560_update_plcp(sc); 777 rt2560_set_basicrates(sc); 778 rt2560_set_bssid(sc, ni->ni_bssid); 779 } 780 781 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 782 ic->ic_opmode == IEEE80211_M_IBSS) { 783 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 784 if (m == NULL) { 785 device_printf(sc->sc_dev, 786 "could not allocate beacon\n"); 787 error = ENOBUFS; 788 break; 789 } 790 791 ieee80211_ref_node(ni); 792 error = rt2560_tx_bcn(sc, m, ni); 793 if (error != 0) 794 break; 795 } 796 797 /* turn assocation led on */ 798 rt2560_update_led(sc, 1, 0); 799 800 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 801 callout_reset(&sc->rssadapt_ch, hz / 10, 802 rt2560_update_rssadapt, sc); 803 804 rt2560_enable_tsf_sync(sc); 805 } 806 break; 807 case IEEE80211_S_SCAN: 808 case IEEE80211_S_AUTH: 809 case IEEE80211_S_ASSOC: 810 default: 811 break; 812 } 813 814 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 815} 816 817/* 818 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 819 * 93C66). 820 */ 821static uint16_t 822rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 823{ 824 uint32_t tmp; 825 uint16_t val; 826 int n; 827 828 /* clock C once before the first command */ 829 RT2560_EEPROM_CTL(sc, 0); 830 831 RT2560_EEPROM_CTL(sc, RT2560_S); 832 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 833 RT2560_EEPROM_CTL(sc, RT2560_S); 834 835 /* write start bit (1) */ 836 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 837 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 838 839 /* write READ opcode (10) */ 840 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 841 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 842 RT2560_EEPROM_CTL(sc, RT2560_S); 843 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 844 845 /* write address (A5-A0 or A7-A0) */ 846 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 847 for (; n >= 0; n--) { 848 RT2560_EEPROM_CTL(sc, RT2560_S | 849 (((addr >> n) & 1) << RT2560_SHIFT_D)); 850 RT2560_EEPROM_CTL(sc, RT2560_S | 851 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 852 } 853 854 RT2560_EEPROM_CTL(sc, RT2560_S); 855 856 /* read data Q15-Q0 */ 857 val = 0; 858 for (n = 15; n >= 0; n--) { 859 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 860 tmp = RAL_READ(sc, RT2560_CSR21); 861 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 862 RT2560_EEPROM_CTL(sc, RT2560_S); 863 } 864 865 RT2560_EEPROM_CTL(sc, 0); 866 867 /* clear Chip Select and clock C */ 868 RT2560_EEPROM_CTL(sc, RT2560_S); 869 RT2560_EEPROM_CTL(sc, 0); 870 RT2560_EEPROM_CTL(sc, RT2560_C); 871 872 return val; 873} 874 875/* 876 * Some frames were processed by the hardware cipher engine and are ready for 877 * transmission. 878 */ 879static void 880rt2560_encryption_intr(struct rt2560_softc *sc) 881{ 882 struct rt2560_tx_desc *desc; 883 int hw; 884 885 /* retrieve last descriptor index processed by cipher engine */ 886 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 887 hw /= RT2560_TX_DESC_SIZE; 888 889 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 890 BUS_DMASYNC_POSTREAD); 891 892 for (; sc->txq.next_encrypt != hw;) { 893 desc = &sc->txq.desc[sc->txq.next_encrypt]; 894 895 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 896 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 897 break; 898 899 /* for TKIP, swap eiv field to fix a bug in ASIC */ 900 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 901 RT2560_TX_CIPHER_TKIP) 902 desc->eiv = bswap32(desc->eiv); 903 904 /* mark the frame ready for transmission */ 905 desc->flags |= htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 906 907 DPRINTFN(15, ("encryption done idx=%u\n", 908 sc->txq.next_encrypt)); 909 910 sc->txq.next_encrypt = 911 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 912 } 913 914 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 915 BUS_DMASYNC_PREWRITE); 916 917 /* kick Tx */ 918 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 919} 920 921static void 922rt2560_tx_intr(struct rt2560_softc *sc) 923{ 924 struct ieee80211com *ic = &sc->sc_ic; 925 struct ifnet *ifp = ic->ic_ifp; 926 struct rt2560_tx_desc *desc; 927 struct rt2560_tx_data *data; 928 struct rt2560_node *rn; 929 930 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 931 BUS_DMASYNC_POSTREAD); 932 933 for (;;) { 934 desc = &sc->txq.desc[sc->txq.next]; 935 data = &sc->txq.data[sc->txq.next]; 936 937 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 938 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 939 !(le32toh(desc->flags) & RT2560_TX_VALID)) 940 break; 941 942 rn = (struct rt2560_node *)data->ni; 943 944 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 945 case RT2560_TX_SUCCESS: 946 DPRINTFN(10, ("data frame sent successfully\n")); 947 if (data->id.id_node != NULL) { 948 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 949 &data->id); 950 } 951 ifp->if_opackets++; 952 break; 953 954 case RT2560_TX_SUCCESS_RETRY: 955 DPRINTFN(9, ("data frame sent after %u retries\n", 956 (le32toh(desc->flags) >> 5) & 0x7)); 957 ifp->if_opackets++; 958 break; 959 960 case RT2560_TX_FAIL_RETRY: 961 DPRINTFN(9, ("sending data frame failed (too much " 962 "retries)\n")); 963 if (data->id.id_node != NULL) { 964 ral_rssadapt_lower_rate(ic, data->ni, 965 &rn->rssadapt, &data->id); 966 } 967 ifp->if_oerrors++; 968 break; 969 970 case RT2560_TX_FAIL_INVALID: 971 case RT2560_TX_FAIL_OTHER: 972 default: 973 device_printf(sc->sc_dev, "sending data frame failed " 974 "0x%08x\n", le32toh(desc->flags)); 975 ifp->if_oerrors++; 976 } 977 978 bus_dmamap_sync(sc->txq.data_dmat, data->map, 979 BUS_DMASYNC_POSTWRITE); 980 bus_dmamap_unload(sc->txq.data_dmat, data->map); 981 m_freem(data->m); 982 data->m = NULL; 983 ieee80211_free_node(data->ni); 984 data->ni = NULL; 985 986 /* descriptor is no longer valid */ 987 desc->flags &= ~htole32(RT2560_TX_VALID); 988 989 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 990 991 sc->txq.queued--; 992 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 993 } 994 995 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 996 BUS_DMASYNC_PREWRITE); 997 998 sc->sc_tx_timer = 0; 999 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1000 rt2560_start(ifp); 1001} 1002 1003static void 1004rt2560_prio_intr(struct rt2560_softc *sc) 1005{ 1006 struct ieee80211com *ic = &sc->sc_ic; 1007 struct ifnet *ifp = ic->ic_ifp; 1008 struct rt2560_tx_desc *desc; 1009 struct rt2560_tx_data *data; 1010 struct ieee80211_node *ni; 1011 struct mbuf *m; 1012 int flags; 1013 1014 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1015 BUS_DMASYNC_POSTREAD); 1016 1017 for (;;) { 1018 desc = &sc->prioq.desc[sc->prioq.next]; 1019 data = &sc->prioq.data[sc->prioq.next]; 1020 1021 flags = le32toh(desc->flags); 1022 if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0) 1023 break; 1024 1025 switch (flags & RT2560_TX_RESULT_MASK) { 1026 case RT2560_TX_SUCCESS: 1027 DPRINTFN(10, ("mgt frame sent successfully\n")); 1028 break; 1029 1030 case RT2560_TX_SUCCESS_RETRY: 1031 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1032 (flags >> 5) & 0x7)); 1033 break; 1034 1035 case RT2560_TX_FAIL_RETRY: 1036 DPRINTFN(9, ("sending mgt frame failed (too much " 1037 "retries)\n")); 1038 break; 1039 1040 case RT2560_TX_FAIL_INVALID: 1041 case RT2560_TX_FAIL_OTHER: 1042 default: 1043 device_printf(sc->sc_dev, "sending mgt frame failed " 1044 "0x%08x\n", flags); 1045 break; 1046 } 1047 1048 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1049 BUS_DMASYNC_POSTWRITE); 1050 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1051 1052 m = data->m; 1053 data->m = NULL; 1054 ni = data->ni; 1055 data->ni = NULL; 1056 1057 /* descriptor is no longer valid */ 1058 desc->flags &= ~htole32(RT2560_TX_VALID); 1059 1060 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1061 1062 sc->prioq.queued--; 1063 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1064 1065 if (m->m_flags & M_TXCB) 1066 ieee80211_process_callback(ni, m, 1067 (flags & RT2560_TX_RESULT_MASK) &~ 1068 (RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY)); 1069 m_freem(m); 1070 ieee80211_free_node(ni); 1071 } 1072 1073 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1074 BUS_DMASYNC_PREWRITE); 1075 1076 sc->sc_tx_timer = 0; 1077 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1078 rt2560_start(ifp); 1079} 1080 1081/* 1082 * Some frames were processed by the hardware cipher engine and are ready for 1083 * transmission to the IEEE802.11 layer. 1084 */ 1085static void 1086rt2560_decryption_intr(struct rt2560_softc *sc) 1087{ 1088 struct ieee80211com *ic = &sc->sc_ic; 1089 struct ifnet *ifp = ic->ic_ifp; 1090 struct rt2560_rx_desc *desc; 1091 struct rt2560_rx_data *data; 1092 bus_addr_t physaddr; 1093 struct ieee80211_frame *wh; 1094 struct ieee80211_node *ni; 1095 struct rt2560_node *rn; 1096 struct mbuf *mnew, *m; 1097 int hw, error; 1098 1099 /* retrieve last decriptor index processed by cipher engine */ 1100 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1101 hw /= RT2560_RX_DESC_SIZE; 1102 1103 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1104 BUS_DMASYNC_POSTREAD); 1105 1106 for (; sc->rxq.cur_decrypt != hw;) { 1107 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1108 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1109 1110 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1111 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1112 break; 1113 1114 if (data->drop) { 1115 ifp->if_ierrors++; 1116 goto skip; 1117 } 1118 1119 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1120 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1121 ifp->if_ierrors++; 1122 goto skip; 1123 } 1124 1125 /* 1126 * Try to allocate a new mbuf for this ring element and load it 1127 * before processing the current mbuf. If the ring element 1128 * cannot be loaded, drop the received packet and reuse the old 1129 * mbuf. In the unlikely case that the old mbuf can't be 1130 * reloaded either, explicitly panic. 1131 */ 1132 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1133 if (mnew == NULL) { 1134 ifp->if_ierrors++; 1135 goto skip; 1136 } 1137 1138 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1139 BUS_DMASYNC_POSTREAD); 1140 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1141 1142 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1143 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1144 &physaddr, 0); 1145 if (error != 0) { 1146 m_freem(mnew); 1147 1148 /* try to reload the old mbuf */ 1149 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1150 mtod(data->m, void *), MCLBYTES, 1151 rt2560_dma_map_addr, &physaddr, 0); 1152 if (error != 0) { 1153 /* very unlikely that it will fail... */ 1154 panic("%s: could not load old rx mbuf", 1155 device_get_name(sc->sc_dev)); 1156 } 1157 ifp->if_ierrors++; 1158 goto skip; 1159 } 1160 1161 /* 1162 * New mbuf successfully loaded, update Rx ring and continue 1163 * processing. 1164 */ 1165 m = data->m; 1166 data->m = mnew; 1167 desc->physaddr = htole32(physaddr); 1168 1169 /* finalize mbuf */ 1170 m->m_pkthdr.rcvif = ifp; 1171 m->m_pkthdr.len = m->m_len = 1172 (le32toh(desc->flags) >> 16) & 0xfff; 1173 1174 if (bpf_peers_present(sc->sc_drvbpf)) { 1175 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1176 uint32_t tsf_lo, tsf_hi; 1177 1178 /* get timestamp (low and high 32 bits) */ 1179 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1180 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1181 1182 tap->wr_tsf = 1183 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1184 tap->wr_flags = 0; 1185 tap->wr_rate = rt2560_rxrate(desc); 1186 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1187 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1188 tap->wr_antenna = sc->rx_ant; 1189 tap->wr_antsignal = RT2560_RSSI(sc, desc->rssi); 1190 1191 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1192 } 1193 1194 sc->sc_flags |= RAL_INPUT_RUNNING; 1195 RAL_UNLOCK(sc); 1196 wh = mtod(m, struct ieee80211_frame *); 1197 ni = ieee80211_find_rxnode(ic, 1198 (struct ieee80211_frame_min *)wh); 1199 1200 /* send the frame to the 802.11 layer */ 1201 ieee80211_input(ic, m, ni, RT2560_RSSI(sc, desc->rssi), 1202 RT2560_NOISE_FLOOR, 0); 1203 1204 /* give rssi to the rate adatation algorithm */ 1205 rn = (struct rt2560_node *)ni; 1206 ral_rssadapt_input(ic, ni, &rn->rssadapt, 1207 RT2560_RSSI(sc, desc->rssi)); 1208 1209 /* node is no longer needed */ 1210 ieee80211_free_node(ni); 1211 1212 RAL_LOCK(sc); 1213 sc->sc_flags &= ~RAL_INPUT_RUNNING; 1214skip: desc->flags = htole32(RT2560_RX_BUSY); 1215 1216 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1217 1218 sc->rxq.cur_decrypt = 1219 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT; 1220 } 1221 1222 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1223 BUS_DMASYNC_PREWRITE); 1224} 1225 1226/* 1227 * Some frames were received. Pass them to the hardware cipher engine before 1228 * sending them to the 802.11 layer. 1229 */ 1230static void 1231rt2560_rx_intr(struct rt2560_softc *sc) 1232{ 1233 struct rt2560_rx_desc *desc; 1234 struct rt2560_rx_data *data; 1235 1236 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1237 BUS_DMASYNC_POSTREAD); 1238 1239 for (;;) { 1240 desc = &sc->rxq.desc[sc->rxq.cur]; 1241 data = &sc->rxq.data[sc->rxq.cur]; 1242 1243 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1244 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1245 break; 1246 1247 data->drop = 0; 1248 1249 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1250 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1251 /* 1252 * This should not happen since we did not request 1253 * to receive those frames when we filled RXCSR0. 1254 */ 1255 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1256 le32toh(desc->flags))); 1257 data->drop = 1; 1258 } 1259 1260 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1261 DPRINTFN(5, ("bad length\n")); 1262 data->drop = 1; 1263 } 1264 1265 /* mark the frame for decryption */ 1266 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1267 1268 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1269 1270 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1271 } 1272 1273 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1274 BUS_DMASYNC_PREWRITE); 1275 1276 /* kick decrypt */ 1277 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1278} 1279 1280/* 1281 * This function is called periodically in IBSS mode when a new beacon must be 1282 * sent out. 1283 */ 1284static void 1285rt2560_beacon_expire(struct rt2560_softc *sc) 1286{ 1287 struct ieee80211com *ic = &sc->sc_ic; 1288 struct rt2560_tx_data *data; 1289 1290 if (ic->ic_opmode != IEEE80211_M_IBSS && 1291 ic->ic_opmode != IEEE80211_M_HOSTAP) 1292 return; 1293 1294 data = &sc->bcnq.data[sc->bcnq.next]; 1295 /* 1296 * Don't send beacon if bsschan isn't set 1297 */ 1298 if (data->ni == NULL) 1299 return; 1300 1301 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1302 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1303 1304 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1305 1306 if (bpf_peers_present(ic->ic_rawbpf)) 1307 bpf_mtap(ic->ic_rawbpf, data->m); 1308 1309 rt2560_tx_bcn(sc, data->m, data->ni); 1310 1311 DPRINTFN(15, ("beacon expired\n")); 1312 1313 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1314} 1315 1316/* ARGSUSED */ 1317static void 1318rt2560_wakeup_expire(struct rt2560_softc *sc) 1319{ 1320 DPRINTFN(2, ("wakeup expired\n")); 1321} 1322 1323void 1324rt2560_intr(void *arg) 1325{ 1326 struct rt2560_softc *sc = arg; 1327 struct ifnet *ifp = sc->sc_ifp; 1328 uint32_t r; 1329 1330 RAL_LOCK(sc); 1331 1332 /* disable interrupts */ 1333 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1334 1335 /* don't re-enable interrupts if we're shutting down */ 1336 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1337 RAL_UNLOCK(sc); 1338 return; 1339 } 1340 1341 r = RAL_READ(sc, RT2560_CSR7); 1342 RAL_WRITE(sc, RT2560_CSR7, r); 1343 1344 if (r & RT2560_BEACON_EXPIRE) 1345 rt2560_beacon_expire(sc); 1346 1347 if (r & RT2560_WAKEUP_EXPIRE) 1348 rt2560_wakeup_expire(sc); 1349 1350 if (r & RT2560_ENCRYPTION_DONE) 1351 rt2560_encryption_intr(sc); 1352 1353 if (r & RT2560_TX_DONE) 1354 rt2560_tx_intr(sc); 1355 1356 if (r & RT2560_PRIO_DONE) 1357 rt2560_prio_intr(sc); 1358 1359 if (r & RT2560_DECRYPTION_DONE) 1360 rt2560_decryption_intr(sc); 1361 1362 if (r & RT2560_RX_DONE) 1363 rt2560_rx_intr(sc); 1364 1365 /* re-enable interrupts */ 1366 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1367 1368 RAL_UNLOCK(sc); 1369} 1370 1371/* quickly determine if a given rate is CCK or OFDM */ 1372#define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1373 1374#define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1375#define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1376 1377#define RAL_SIFS 10 /* us */ 1378 1379#define RT2560_TXRX_TURNAROUND 10 /* us */ 1380 1381/* 1382 * This function is only used by the Rx radiotap code. 1383 */ 1384static uint8_t 1385rt2560_rxrate(struct rt2560_rx_desc *desc) 1386{ 1387 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1388 /* reverse function of rt2560_plcp_signal */ 1389 switch (desc->rate) { 1390 case 0xb: return 12; 1391 case 0xf: return 18; 1392 case 0xa: return 24; 1393 case 0xe: return 36; 1394 case 0x9: return 48; 1395 case 0xd: return 72; 1396 case 0x8: return 96; 1397 case 0xc: return 108; 1398 } 1399 } else { 1400 if (desc->rate == 10) 1401 return 2; 1402 if (desc->rate == 20) 1403 return 4; 1404 if (desc->rate == 55) 1405 return 11; 1406 if (desc->rate == 110) 1407 return 22; 1408 } 1409 return 2; /* should not get there */ 1410} 1411 1412/* 1413 * Return the expected ack rate for a frame transmitted at rate `rate'. 1414 * XXX: this should depend on the destination node basic rate set. 1415 */ 1416static int 1417rt2560_ack_rate(struct ieee80211com *ic, int rate) 1418{ 1419 switch (rate) { 1420 /* CCK rates */ 1421 case 2: 1422 return 2; 1423 case 4: 1424 case 11: 1425 case 22: 1426 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1427 1428 /* OFDM rates */ 1429 case 12: 1430 case 18: 1431 return 12; 1432 case 24: 1433 case 36: 1434 return 24; 1435 case 48: 1436 case 72: 1437 case 96: 1438 case 108: 1439 return 48; 1440 } 1441 1442 /* default to 1Mbps */ 1443 return 2; 1444} 1445 1446/* 1447 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1448 * The function automatically determines the operating mode depending on the 1449 * given rate. `flags' indicates whether short preamble is in use or not. 1450 */ 1451static uint16_t 1452rt2560_txtime(int len, int rate, uint32_t flags) 1453{ 1454 uint16_t txtime; 1455 1456 if (RAL_RATE_IS_OFDM(rate)) { 1457 /* IEEE Std 802.11a-1999, pp. 37 */ 1458 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1459 txtime = 16 + 4 + 4 * txtime + 6; 1460 } else { 1461 /* IEEE Std 802.11b-1999, pp. 28 */ 1462 txtime = (16 * len + rate - 1) / rate; 1463 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1464 txtime += 72 + 24; 1465 else 1466 txtime += 144 + 48; 1467 } 1468 1469 return txtime; 1470} 1471 1472static uint8_t 1473rt2560_plcp_signal(int rate) 1474{ 1475 switch (rate) { 1476 /* CCK rates (returned values are device-dependent) */ 1477 case 2: return 0x0; 1478 case 4: return 0x1; 1479 case 11: return 0x2; 1480 case 22: return 0x3; 1481 1482 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1483 case 12: return 0xb; 1484 case 18: return 0xf; 1485 case 24: return 0xa; 1486 case 36: return 0xe; 1487 case 48: return 0x9; 1488 case 72: return 0xd; 1489 case 96: return 0x8; 1490 case 108: return 0xc; 1491 1492 /* unsupported rates (should not get there) */ 1493 default: return 0xff; 1494 } 1495} 1496 1497static void 1498rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1499 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1500{ 1501 struct ieee80211com *ic = &sc->sc_ic; 1502 uint16_t plcp_length; 1503 int remainder; 1504 1505 desc->flags = htole32(flags); 1506 desc->flags |= htole32(len << 16); 1507 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) : 1508 htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 1509 1510 desc->physaddr = htole32(physaddr); 1511 desc->wme = htole16( 1512 RT2560_AIFSN(2) | 1513 RT2560_LOGCWMIN(3) | 1514 RT2560_LOGCWMAX(8)); 1515 1516 /* setup PLCP fields */ 1517 desc->plcp_signal = rt2560_plcp_signal(rate); 1518 desc->plcp_service = 4; 1519 1520 len += IEEE80211_CRC_LEN; 1521 if (RAL_RATE_IS_OFDM(rate)) { 1522 desc->flags |= htole32(RT2560_TX_OFDM); 1523 1524 plcp_length = len & 0xfff; 1525 desc->plcp_length_hi = plcp_length >> 6; 1526 desc->plcp_length_lo = plcp_length & 0x3f; 1527 } else { 1528 plcp_length = (16 * len + rate - 1) / rate; 1529 if (rate == 22) { 1530 remainder = (16 * len) % 22; 1531 if (remainder != 0 && remainder < 7) 1532 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1533 } 1534 desc->plcp_length_hi = plcp_length >> 8; 1535 desc->plcp_length_lo = plcp_length & 0xff; 1536 1537 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1538 desc->plcp_signal |= 0x08; 1539 } 1540} 1541 1542static int 1543rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1544 struct ieee80211_node *ni) 1545{ 1546 struct ieee80211com *ic = &sc->sc_ic; 1547 struct rt2560_tx_desc *desc; 1548 struct rt2560_tx_data *data; 1549 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1550 int nsegs, rate, error; 1551 1552 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1553 data = &sc->bcnq.data[sc->bcnq.cur]; 1554 1555 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1556 1557 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0, 1558 segs, &nsegs, BUS_DMA_NOWAIT); 1559 if (error != 0) { 1560 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1561 error); 1562 m_freem(m0); 1563 return error; 1564 } 1565 1566 if (bpf_peers_present(sc->sc_drvbpf)) { 1567 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1568 1569 tap->wt_flags = 0; 1570 tap->wt_rate = rate; 1571 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1572 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1573 tap->wt_antenna = sc->tx_ant; 1574 1575 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1576 } 1577 1578 data->m = m0; 1579 data->ni = ni; 1580 1581 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1582 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr); 1583 1584 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1585 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1586 1587 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1588 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1589 BUS_DMASYNC_PREWRITE); 1590 1591 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1592 1593 return 0; 1594} 1595 1596static int 1597rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1598 struct ieee80211_node *ni) 1599{ 1600 struct ieee80211com *ic = &sc->sc_ic; 1601 struct rt2560_tx_desc *desc; 1602 struct rt2560_tx_data *data; 1603 struct ieee80211_frame *wh; 1604 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1605 uint16_t dur; 1606 uint32_t flags = 0; 1607 int nsegs, rate, error; 1608 1609 desc = &sc->prioq.desc[sc->prioq.cur]; 1610 data = &sc->prioq.data[sc->prioq.cur]; 1611 1612 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1613 1614 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1615 segs, &nsegs, 0); 1616 if (error != 0) { 1617 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1618 error); 1619 m_freem(m0); 1620 return error; 1621 } 1622 1623 if (bpf_peers_present(sc->sc_drvbpf)) { 1624 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1625 1626 tap->wt_flags = 0; 1627 tap->wt_rate = rate; 1628 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1629 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1630 tap->wt_antenna = sc->tx_ant; 1631 1632 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1633 } 1634 1635 data->m = m0; 1636 data->ni = ni; 1637 1638 wh = mtod(m0, struct ieee80211_frame *); 1639 1640 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1641 flags |= RT2560_TX_ACK; 1642 1643 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1644 RAL_SIFS; 1645 *(uint16_t *)wh->i_dur = htole16(dur); 1646 1647 /* tell hardware to add timestamp for probe responses */ 1648 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1649 IEEE80211_FC0_TYPE_MGT && 1650 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1651 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1652 flags |= RT2560_TX_TIMESTAMP; 1653 } 1654 1655 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, 1656 segs->ds_addr); 1657 1658 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1659 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1660 BUS_DMASYNC_PREWRITE); 1661 1662 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1663 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1664 1665 /* kick prio */ 1666 sc->prioq.queued++; 1667 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1668 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1669 1670 return 0; 1671} 1672 1673static int 1674rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0, 1675 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params) 1676{ 1677 struct ieee80211com *ic = &sc->sc_ic; 1678 struct rt2560_tx_desc *desc; 1679 struct rt2560_tx_data *data; 1680 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1681 uint32_t flags; 1682 int nsegs, rate, error; 1683 1684 desc = &sc->prioq.desc[sc->prioq.cur]; 1685 data = &sc->prioq.data[sc->prioq.cur]; 1686 1687 rate = params->ibp_rate0 & IEEE80211_RATE_VAL; 1688 /* XXX validate */ 1689 if (rate == 0) { 1690 m_freem(m0); 1691 return EINVAL; 1692 } 1693 1694 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1695 segs, &nsegs, 0); 1696 if (error != 0) { 1697 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1698 error); 1699 m_freem(m0); 1700 return error; 1701 } 1702 1703 if (bpf_peers_present(sc->sc_drvbpf)) { 1704 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1705 1706 tap->wt_flags = 0; 1707 tap->wt_rate = rate; 1708 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1709 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1710 tap->wt_antenna = sc->tx_ant; 1711 1712 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1713 } 1714 1715 data->m = m0; 1716 data->ni = ni; 1717 1718 flags = 0; 1719 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) 1720 flags |= RT2560_TX_ACK; 1721 1722 /* XXX need to setup descriptor ourself */ 1723 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, 1724 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0, 1725 segs->ds_addr); 1726 1727 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1728 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1729 BUS_DMASYNC_PREWRITE); 1730 1731 DPRINTFN(10, ("sending raw frame len=%u idx=%u rate=%u\n", 1732 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1733 1734 /* kick prio */ 1735 sc->prioq.queued++; 1736 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1737 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1738 1739 return 0; 1740} 1741 1742/* 1743 * Build a RTS control frame. 1744 */ 1745static struct mbuf * 1746rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1747 uint16_t dur) 1748{ 1749 struct ieee80211_frame_rts *rts; 1750 struct mbuf *m; 1751 1752 MGETHDR(m, M_DONTWAIT, MT_DATA); 1753 if (m == NULL) { 1754 sc->sc_ic.ic_stats.is_tx_nobuf++; 1755 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1756 return NULL; 1757 } 1758 1759 rts = mtod(m, struct ieee80211_frame_rts *); 1760 1761 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1762 IEEE80211_FC0_SUBTYPE_RTS; 1763 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1764 *(uint16_t *)rts->i_dur = htole16(dur); 1765 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1766 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1767 1768 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1769 1770 return m; 1771} 1772 1773static int 1774rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1775 struct ieee80211_node *ni) 1776{ 1777 struct ieee80211com *ic = &sc->sc_ic; 1778 struct rt2560_tx_desc *desc; 1779 struct rt2560_tx_data *data; 1780 struct rt2560_node *rn; 1781 struct ieee80211_frame *wh; 1782 struct ieee80211_key *k; 1783 struct mbuf *mnew; 1784 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1785 uint16_t dur; 1786 uint32_t flags = 0; 1787 int nsegs, rate, error; 1788 1789 wh = mtod(m0, struct ieee80211_frame *); 1790 1791 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1792 rate = ic->ic_fixed_rate; 1793 } else { 1794 struct ieee80211_rateset *rs; 1795 1796 rs = &ni->ni_rates; 1797 rn = (struct rt2560_node *)ni; 1798 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1799 m0->m_pkthdr.len, NULL, 0); 1800 rate = rs->rs_rates[ni->ni_txrate]; 1801 } 1802 rate &= IEEE80211_RATE_VAL; 1803 1804 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1805 k = ieee80211_crypto_encap(ic, ni, m0); 1806 if (k == NULL) { 1807 m_freem(m0); 1808 return ENOBUFS; 1809 } 1810 1811 /* packet header may have moved, reset our local pointer */ 1812 wh = mtod(m0, struct ieee80211_frame *); 1813 } 1814 1815 /* 1816 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1817 * for directed frames only when the length of the MPDU is greater 1818 * than the length threshold indicated by [...]" ic_rtsthreshold. 1819 */ 1820 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1821 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1822 struct mbuf *m; 1823 uint16_t dur; 1824 int rtsrate, ackrate; 1825 1826 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1827 ackrate = rt2560_ack_rate(ic, rate); 1828 1829 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1830 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1831 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1832 3 * RAL_SIFS; 1833 1834 m = rt2560_get_rts(sc, wh, dur); 1835 1836 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1837 data = &sc->txq.data[sc->txq.cur_encrypt]; 1838 1839 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1840 m, segs, &nsegs, 0); 1841 if (error != 0) { 1842 device_printf(sc->sc_dev, 1843 "could not map mbuf (error %d)\n", error); 1844 m_freem(m); 1845 m_freem(m0); 1846 return error; 1847 } 1848 1849 /* avoid multiple free() of the same node for each fragment */ 1850 ieee80211_ref_node(ni); 1851 1852 data->m = m; 1853 data->ni = ni; 1854 1855 /* RTS frames are not taken into account for rssadapt */ 1856 data->id.id_node = NULL; 1857 1858 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1859 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, 1860 segs->ds_addr); 1861 1862 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1863 BUS_DMASYNC_PREWRITE); 1864 1865 sc->txq.queued++; 1866 sc->txq.cur_encrypt = 1867 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1868 1869 /* 1870 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1871 * asynchronous data frame shall be transmitted after the CTS 1872 * frame and a SIFS period. 1873 */ 1874 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1875 } 1876 1877 data = &sc->txq.data[sc->txq.cur_encrypt]; 1878 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1879 1880 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0, 1881 segs, &nsegs, 0); 1882 if (error != 0 && error != EFBIG) { 1883 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1884 error); 1885 m_freem(m0); 1886 return error; 1887 } 1888 if (error != 0) { 1889 mnew = m_defrag(m0, M_DONTWAIT); 1890 if (mnew == NULL) { 1891 device_printf(sc->sc_dev, 1892 "could not defragment mbuf\n"); 1893 m_freem(m0); 1894 return ENOBUFS; 1895 } 1896 m0 = mnew; 1897 1898 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1899 m0, segs, &nsegs, 0); 1900 if (error != 0) { 1901 device_printf(sc->sc_dev, 1902 "could not map mbuf (error %d)\n", error); 1903 m_freem(m0); 1904 return error; 1905 } 1906 1907 /* packet header may have moved, reset our local pointer */ 1908 wh = mtod(m0, struct ieee80211_frame *); 1909 } 1910 1911 if (bpf_peers_present(sc->sc_drvbpf)) { 1912 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1913 1914 tap->wt_flags = 0; 1915 tap->wt_rate = rate; 1916 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1917 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1918 tap->wt_antenna = sc->tx_ant; 1919 1920 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1921 } 1922 1923 data->m = m0; 1924 data->ni = ni; 1925 1926 /* remember link conditions for rate adaptation algorithm */ 1927 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1928 data->id.id_len = m0->m_pkthdr.len; 1929 data->id.id_rateidx = ni->ni_txrate; 1930 data->id.id_node = ni; 1931 data->id.id_rssi = ni->ni_rssi; 1932 } else 1933 data->id.id_node = NULL; 1934 1935 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1936 flags |= RT2560_TX_ACK; 1937 1938 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1939 ic->ic_flags) + RAL_SIFS; 1940 *(uint16_t *)wh->i_dur = htole16(dur); 1941 } 1942 1943 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, 1944 segs->ds_addr); 1945 1946 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1947 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1948 BUS_DMASYNC_PREWRITE); 1949 1950 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1951 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1952 1953 /* kick encrypt */ 1954 sc->txq.queued++; 1955 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1956 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 1957 1958 return 0; 1959} 1960 1961static void 1962rt2560_start(struct ifnet *ifp) 1963{ 1964 struct rt2560_softc *sc = ifp->if_softc; 1965 struct ieee80211com *ic = &sc->sc_ic; 1966 struct mbuf *m0; 1967 struct ether_header *eh; 1968 struct ieee80211_node *ni; 1969 1970 RAL_LOCK(sc); 1971 1972 /* prevent management frames from being sent if we're not ready */ 1973 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1974 RAL_UNLOCK(sc); 1975 return; 1976 } 1977 1978 for (;;) { 1979 IF_POLL(&ic->ic_mgtq, m0); 1980 if (m0 != NULL) { 1981 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 1982 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1983 break; 1984 } 1985 IF_DEQUEUE(&ic->ic_mgtq, m0); 1986 1987 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1988 m0->m_pkthdr.rcvif = NULL; 1989 1990 if (bpf_peers_present(ic->ic_rawbpf)) 1991 bpf_mtap(ic->ic_rawbpf, m0); 1992 1993 if (rt2560_tx_mgt(sc, m0, ni) != 0) { 1994 ieee80211_free_node(ni); 1995 break; 1996 } 1997 } else { 1998 if (ic->ic_state != IEEE80211_S_RUN) 1999 break; 2000 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 2001 if (m0 == NULL) 2002 break; 2003 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 2004 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 2005 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2006 break; 2007 } 2008 2009 if (m0->m_len < sizeof (struct ether_header) && 2010 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 2011 continue; 2012 2013 eh = mtod(m0, struct ether_header *); 2014 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2015 if (ni == NULL) { 2016 m_freem(m0); 2017 continue; 2018 } 2019 if ((ni->ni_flags & IEEE80211_NODE_PWR_MGT) && 2020 (m0->m_flags & M_PWR_SAV) == 0) { 2021 /* 2022 * Station in power save mode; pass the frame 2023 * to the 802.11 layer and continue. We'll get 2024 * the frame back when the time is right. 2025 */ 2026 ieee80211_pwrsave(ni, m0); 2027 /* 2028 * If we're in power save mode 'cuz of a bg 2029 * scan cancel it so the traffic can flow. 2030 * The packet we just queued will automatically 2031 * get sent when we drop out of power save. 2032 * XXX locking 2033 */ 2034 if (ic->ic_flags & IEEE80211_F_SCAN) 2035 ieee80211_cancel_scan(ic); 2036 ieee80211_free_node(ni); 2037 continue; 2038 2039 } 2040 2041 BPF_MTAP(ifp, m0); 2042 2043 m0 = ieee80211_encap(ic, m0, ni); 2044 if (m0 == NULL) { 2045 ieee80211_free_node(ni); 2046 continue; 2047 } 2048 2049 if (bpf_peers_present(ic->ic_rawbpf)) 2050 bpf_mtap(ic->ic_rawbpf, m0); 2051 2052 if (rt2560_tx_data(sc, m0, ni) != 0) { 2053 ieee80211_free_node(ni); 2054 ifp->if_oerrors++; 2055 break; 2056 } 2057 } 2058 2059 sc->sc_tx_timer = 5; 2060 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2061 } 2062 2063 RAL_UNLOCK(sc); 2064} 2065 2066static void 2067rt2560_watchdog(void *arg) 2068{ 2069 struct rt2560_softc *sc = arg; 2070 2071 if (sc->sc_tx_timer > 0) { 2072 if (--sc->sc_tx_timer == 0) { 2073 device_printf(sc->sc_dev, "device timeout\n"); 2074 rt2560_init(sc); 2075 sc->sc_ifp->if_oerrors++; 2076 return; 2077 } 2078 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2079 } 2080} 2081 2082/* 2083 * This function allows for fast channel switching in monitor mode (used by 2084 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2085 * generate a new beacon frame. 2086 */ 2087static int 2088rt2560_reset(struct ifnet *ifp) 2089{ 2090 struct rt2560_softc *sc = ifp->if_softc; 2091 struct ieee80211com *ic = &sc->sc_ic; 2092 2093 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2094 return ENETRESET; 2095 2096 rt2560_set_chan(sc, ic->ic_curchan); 2097 2098 return 0; 2099} 2100 2101static int 2102rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2103{ 2104 struct rt2560_softc *sc = ifp->if_softc; 2105 struct ieee80211com *ic = &sc->sc_ic; 2106 int error = 0; 2107 2108 2109 2110 switch (cmd) { 2111 case SIOCSIFFLAGS: 2112 if (ifp->if_flags & IFF_UP) { 2113 RAL_LOCK(sc); 2114 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2115 rt2560_update_promisc(sc); 2116 else 2117 rt2560_init(sc); 2118 RAL_UNLOCK(sc); 2119 } else { 2120 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2121 rt2560_stop(sc); 2122 } 2123 2124 break; 2125 2126 default: 2127 error = ieee80211_ioctl(ic, cmd, data); 2128 } 2129 2130 if (error == ENETRESET) { 2131 if ((ifp->if_flags & IFF_UP) && 2132 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 2133 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2134 rt2560_init(sc); 2135 error = 0; 2136 } 2137 2138 2139 return error; 2140} 2141 2142static void 2143rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2144{ 2145 uint32_t tmp; 2146 int ntries; 2147 2148 for (ntries = 0; ntries < 100; ntries++) { 2149 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2150 break; 2151 DELAY(1); 2152 } 2153 if (ntries == 100) { 2154 device_printf(sc->sc_dev, "could not write to BBP\n"); 2155 return; 2156 } 2157 2158 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2159 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2160 2161 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2162} 2163 2164static uint8_t 2165rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2166{ 2167 uint32_t val; 2168 int ntries; 2169 2170 val = RT2560_BBP_BUSY | reg << 8; 2171 RAL_WRITE(sc, RT2560_BBPCSR, val); 2172 2173 for (ntries = 0; ntries < 100; ntries++) { 2174 val = RAL_READ(sc, RT2560_BBPCSR); 2175 if (!(val & RT2560_BBP_BUSY)) 2176 return val & 0xff; 2177 DELAY(1); 2178 } 2179 2180 device_printf(sc->sc_dev, "could not read from BBP\n"); 2181 return 0; 2182} 2183 2184static void 2185rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2186{ 2187 uint32_t tmp; 2188 int ntries; 2189 2190 for (ntries = 0; ntries < 100; ntries++) { 2191 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2192 break; 2193 DELAY(1); 2194 } 2195 if (ntries == 100) { 2196 device_printf(sc->sc_dev, "could not write to RF\n"); 2197 return; 2198 } 2199 2200 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2201 (reg & 0x3); 2202 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2203 2204 /* remember last written value in sc */ 2205 sc->rf_regs[reg] = val; 2206 2207 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2208} 2209 2210static void 2211rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2212{ 2213 struct ieee80211com *ic = &sc->sc_ic; 2214 uint8_t power, tmp; 2215 u_int i, chan; 2216 2217 chan = ieee80211_chan2ieee(ic, c); 2218 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2219 return; 2220 2221 if (IEEE80211_IS_CHAN_2GHZ(c)) 2222 power = min(sc->txpow[chan - 1], 31); 2223 else 2224 power = 31; 2225 2226 /* adjust txpower using ifconfig settings */ 2227 power -= (100 - ic->ic_txpowlimit) / 8; 2228 2229 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2230 2231 switch (sc->rf_rev) { 2232 case RT2560_RF_2522: 2233 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2234 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2235 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2236 break; 2237 2238 case RT2560_RF_2523: 2239 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2240 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2241 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2242 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2243 break; 2244 2245 case RT2560_RF_2524: 2246 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2247 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2248 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2249 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2250 break; 2251 2252 case RT2560_RF_2525: 2253 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2254 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2255 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2256 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2257 2258 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2259 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2260 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2261 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2262 break; 2263 2264 case RT2560_RF_2525E: 2265 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2266 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2267 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2268 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2269 break; 2270 2271 case RT2560_RF_2526: 2272 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2273 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2274 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2275 2276 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2277 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2278 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2279 break; 2280 2281 /* dual-band RF */ 2282 case RT2560_RF_5222: 2283 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2284 2285 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2286 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2287 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2288 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2289 break; 2290 default: 2291 printf("unknown ral rev=%d\n", sc->rf_rev); 2292 } 2293 2294 if (ic->ic_state != IEEE80211_S_SCAN) { 2295 /* set Japan filter bit for channel 14 */ 2296 tmp = rt2560_bbp_read(sc, 70); 2297 2298 tmp &= ~RT2560_JAPAN_FILTER; 2299 if (chan == 14) 2300 tmp |= RT2560_JAPAN_FILTER; 2301 2302 rt2560_bbp_write(sc, 70, tmp); 2303 2304 /* clear CRC errors */ 2305 RAL_READ(sc, RT2560_CNT0); 2306 } 2307} 2308 2309static void 2310rt2560_set_channel(struct ieee80211com *ic) 2311{ 2312 struct ifnet *ifp = ic->ic_ifp; 2313 struct rt2560_softc *sc = ifp->if_softc; 2314 2315 RAL_LOCK(sc); 2316 rt2560_set_chan(sc, ic->ic_curchan); 2317 RAL_UNLOCK(sc); 2318 2319} 2320 2321#if 0 2322/* 2323 * Disable RF auto-tuning. 2324 */ 2325static void 2326rt2560_disable_rf_tune(struct rt2560_softc *sc) 2327{ 2328 uint32_t tmp; 2329 2330 if (sc->rf_rev != RT2560_RF_2523) { 2331 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2332 rt2560_rf_write(sc, RAL_RF1, tmp); 2333 } 2334 2335 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2336 rt2560_rf_write(sc, RAL_RF3, tmp); 2337 2338 DPRINTFN(2, ("disabling RF autotune\n")); 2339} 2340#endif 2341 2342/* 2343 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2344 * synchronization. 2345 */ 2346static void 2347rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2348{ 2349 struct ieee80211com *ic = &sc->sc_ic; 2350 uint16_t logcwmin, preload; 2351 uint32_t tmp; 2352 2353 /* first, disable TSF synchronization */ 2354 RAL_WRITE(sc, RT2560_CSR14, 0); 2355 2356 tmp = 16 * ic->ic_bss->ni_intval; 2357 RAL_WRITE(sc, RT2560_CSR12, tmp); 2358 2359 RAL_WRITE(sc, RT2560_CSR13, 0); 2360 2361 logcwmin = 5; 2362 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2363 tmp = logcwmin << 16 | preload; 2364 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2365 2366 /* finally, enable TSF synchronization */ 2367 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2368 if (ic->ic_opmode == IEEE80211_M_STA) 2369 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2370 else 2371 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2372 RT2560_ENABLE_BEACON_GENERATOR; 2373 RAL_WRITE(sc, RT2560_CSR14, tmp); 2374 2375 DPRINTF(("enabling TSF synchronization\n")); 2376} 2377 2378static void 2379rt2560_update_plcp(struct rt2560_softc *sc) 2380{ 2381 struct ieee80211com *ic = &sc->sc_ic; 2382 2383 /* no short preamble for 1Mbps */ 2384 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2385 2386 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2387 /* values taken from the reference driver */ 2388 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2389 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2390 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2391 } else { 2392 /* same values as above or'ed 0x8 */ 2393 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2394 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2395 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2396 } 2397 2398 DPRINTF(("updating PLCP for %s preamble\n", 2399 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2400} 2401 2402/* 2403 * This function can be called by ieee80211_set_shortslottime(). Refer to 2404 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2405 */ 2406static void 2407rt2560_update_slot(struct ifnet *ifp) 2408{ 2409 struct rt2560_softc *sc = ifp->if_softc; 2410 struct ieee80211com *ic = &sc->sc_ic; 2411 uint8_t slottime; 2412 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2413 uint32_t tmp; 2414 2415 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2416 2417 /* update the MAC slot boundaries */ 2418 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2419 tx_pifs = tx_sifs + slottime; 2420 tx_difs = tx_sifs + 2 * slottime; 2421 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2422 2423 tmp = RAL_READ(sc, RT2560_CSR11); 2424 tmp = (tmp & ~0x1f00) | slottime << 8; 2425 RAL_WRITE(sc, RT2560_CSR11, tmp); 2426 2427 tmp = tx_pifs << 16 | tx_sifs; 2428 RAL_WRITE(sc, RT2560_CSR18, tmp); 2429 2430 tmp = eifs << 16 | tx_difs; 2431 RAL_WRITE(sc, RT2560_CSR19, tmp); 2432 2433 DPRINTF(("setting slottime to %uus\n", slottime)); 2434} 2435 2436static void 2437rt2560_set_basicrates(struct rt2560_softc *sc) 2438{ 2439 struct ieee80211com *ic = &sc->sc_ic; 2440 2441 /* update basic rate set */ 2442 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2443 /* 11b basic rates: 1, 2Mbps */ 2444 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2445 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2446 /* 11a basic rates: 6, 12, 24Mbps */ 2447 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2448 } else { 2449 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2450 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2451 } 2452} 2453 2454static void 2455rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2456{ 2457 uint32_t tmp; 2458 2459 /* set ON period to 70ms and OFF period to 30ms */ 2460 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2461 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2462} 2463 2464static void 2465rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid) 2466{ 2467 uint32_t tmp; 2468 2469 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2470 RAL_WRITE(sc, RT2560_CSR5, tmp); 2471 2472 tmp = bssid[4] | bssid[5] << 8; 2473 RAL_WRITE(sc, RT2560_CSR6, tmp); 2474 2475 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2476} 2477 2478static void 2479rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2480{ 2481 uint32_t tmp; 2482 2483 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2484 RAL_WRITE(sc, RT2560_CSR3, tmp); 2485 2486 tmp = addr[4] | addr[5] << 8; 2487 RAL_WRITE(sc, RT2560_CSR4, tmp); 2488 2489 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2490} 2491 2492static void 2493rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2494{ 2495 uint32_t tmp; 2496 2497 tmp = RAL_READ(sc, RT2560_CSR3); 2498 addr[0] = tmp & 0xff; 2499 addr[1] = (tmp >> 8) & 0xff; 2500 addr[2] = (tmp >> 16) & 0xff; 2501 addr[3] = (tmp >> 24); 2502 2503 tmp = RAL_READ(sc, RT2560_CSR4); 2504 addr[4] = tmp & 0xff; 2505 addr[5] = (tmp >> 8) & 0xff; 2506} 2507 2508static void 2509rt2560_update_promisc(struct rt2560_softc *sc) 2510{ 2511 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2512 uint32_t tmp; 2513 2514 tmp = RAL_READ(sc, RT2560_RXCSR0); 2515 2516 tmp &= ~RT2560_DROP_NOT_TO_ME; 2517 if (!(ifp->if_flags & IFF_PROMISC)) 2518 tmp |= RT2560_DROP_NOT_TO_ME; 2519 2520 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2521 2522 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2523 "entering" : "leaving")); 2524} 2525 2526static const char * 2527rt2560_get_rf(int rev) 2528{ 2529 switch (rev) { 2530 case RT2560_RF_2522: return "RT2522"; 2531 case RT2560_RF_2523: return "RT2523"; 2532 case RT2560_RF_2524: return "RT2524"; 2533 case RT2560_RF_2525: return "RT2525"; 2534 case RT2560_RF_2525E: return "RT2525e"; 2535 case RT2560_RF_2526: return "RT2526"; 2536 case RT2560_RF_5222: return "RT5222"; 2537 default: return "unknown"; 2538 } 2539} 2540 2541static void 2542rt2560_read_eeprom(struct rt2560_softc *sc) 2543{ 2544 uint16_t val; 2545 int i; 2546 2547 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2548 sc->rf_rev = (val >> 11) & 0x7; 2549 sc->hw_radio = (val >> 10) & 0x1; 2550 sc->led_mode = (val >> 6) & 0x7; 2551 sc->rx_ant = (val >> 4) & 0x3; 2552 sc->tx_ant = (val >> 2) & 0x3; 2553 sc->nb_ant = val & 0x3; 2554 2555 /* read default values for BBP registers */ 2556 for (i = 0; i < 16; i++) { 2557 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2558 sc->bbp_prom[i].reg = val >> 8; 2559 sc->bbp_prom[i].val = val & 0xff; 2560 } 2561 2562 /* read Tx power for all b/g channels */ 2563 for (i = 0; i < 14 / 2; i++) { 2564 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2565 sc->txpow[i * 2] = val >> 8; 2566 sc->txpow[i * 2 + 1] = val & 0xff; 2567 } 2568 2569 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE); 2570 if ((val & 0xff) == 0xff) 2571 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR; 2572 else 2573 sc->rssi_corr = val & 0xff; 2574 DPRINTF(("rssi correction %d, calibrate 0x%02x\n", 2575 sc->rssi_corr, val)); 2576} 2577 2578 2579static void 2580rt2560_scan_start(struct ieee80211com *ic) 2581{ 2582 struct ifnet *ifp = ic->ic_ifp; 2583 struct rt2560_softc *sc = ifp->if_softc; 2584 2585 /* abort TSF synchronization */ 2586 RAL_WRITE(sc, RT2560_CSR14, 0); 2587 rt2560_set_bssid(sc, ifp->if_broadcastaddr); 2588} 2589 2590static void 2591rt2560_scan_end(struct ieee80211com *ic) 2592{ 2593 struct ifnet *ifp = ic->ic_ifp; 2594 struct rt2560_softc *sc = ifp->if_softc; 2595 2596 rt2560_enable_tsf_sync(sc); 2597 /* XXX keep local copy */ 2598 rt2560_set_bssid(sc, ic->ic_bss->ni_bssid); 2599} 2600 2601static int 2602rt2560_bbp_init(struct rt2560_softc *sc) 2603{ 2604#define N(a) (sizeof (a) / sizeof ((a)[0])) 2605 int i, ntries; 2606 2607 /* wait for BBP to be ready */ 2608 for (ntries = 0; ntries < 100; ntries++) { 2609 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2610 break; 2611 DELAY(1); 2612 } 2613 if (ntries == 100) { 2614 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2615 return EIO; 2616 } 2617 2618 /* initialize BBP registers to default values */ 2619 for (i = 0; i < N(rt2560_def_bbp); i++) { 2620 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2621 rt2560_def_bbp[i].val); 2622 } 2623#if 0 2624 /* initialize BBP registers to values stored in EEPROM */ 2625 for (i = 0; i < 16; i++) { 2626 if (sc->bbp_prom[i].reg == 0xff) 2627 continue; 2628 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2629 } 2630#endif 2631 2632 return 0; 2633#undef N 2634} 2635 2636static void 2637rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2638{ 2639 uint32_t tmp; 2640 uint8_t tx; 2641 2642 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2643 if (antenna == 1) 2644 tx |= RT2560_BBP_ANTA; 2645 else if (antenna == 2) 2646 tx |= RT2560_BBP_ANTB; 2647 else 2648 tx |= RT2560_BBP_DIVERSITY; 2649 2650 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2651 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2652 sc->rf_rev == RT2560_RF_5222) 2653 tx |= RT2560_BBP_FLIPIQ; 2654 2655 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2656 2657 /* update values for CCK and OFDM in BBPCSR1 */ 2658 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2659 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2660 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2661} 2662 2663static void 2664rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2665{ 2666 uint8_t rx; 2667 2668 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2669 if (antenna == 1) 2670 rx |= RT2560_BBP_ANTA; 2671 else if (antenna == 2) 2672 rx |= RT2560_BBP_ANTB; 2673 else 2674 rx |= RT2560_BBP_DIVERSITY; 2675 2676 /* need to force no I/Q flip for RF 2525e and 2526 */ 2677 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2678 rx &= ~RT2560_BBP_FLIPIQ; 2679 2680 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2681} 2682 2683static void 2684rt2560_init(void *priv) 2685{ 2686#define N(a) (sizeof (a) / sizeof ((a)[0])) 2687 struct rt2560_softc *sc = priv; 2688 struct ieee80211com *ic = &sc->sc_ic; 2689 struct ifnet *ifp = ic->ic_ifp; 2690 uint32_t tmp; 2691 int i; 2692 2693 2694 2695 rt2560_stop(sc); 2696 2697 RAL_LOCK(sc); 2698 /* setup tx rings */ 2699 tmp = RT2560_PRIO_RING_COUNT << 24 | 2700 RT2560_ATIM_RING_COUNT << 16 | 2701 RT2560_TX_RING_COUNT << 8 | 2702 RT2560_TX_DESC_SIZE; 2703 2704 /* rings must be initialized in this exact order */ 2705 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2706 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2707 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2708 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2709 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2710 2711 /* setup rx ring */ 2712 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2713 2714 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2715 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2716 2717 /* initialize MAC registers to default values */ 2718 for (i = 0; i < N(rt2560_def_mac); i++) 2719 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2720 2721 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2722 rt2560_set_macaddr(sc, ic->ic_myaddr); 2723 2724 /* set basic rate set (will be updated later) */ 2725 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2726 2727 rt2560_set_txantenna(sc, sc->tx_ant); 2728 rt2560_set_rxantenna(sc, sc->rx_ant); 2729 rt2560_update_slot(ifp); 2730 rt2560_update_plcp(sc); 2731 rt2560_update_led(sc, 0, 0); 2732 2733 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2734 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2735 2736 if (rt2560_bbp_init(sc) != 0) { 2737 rt2560_stop(sc); 2738 RAL_UNLOCK(sc); 2739 return; 2740 } 2741 2742 /* set default BSS channel */ 2743 rt2560_set_chan(sc, ic->ic_curchan); 2744 2745 /* kick Rx */ 2746 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2747 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2748 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2749 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2750 tmp |= RT2560_DROP_TODS; 2751 if (!(ifp->if_flags & IFF_PROMISC)) 2752 tmp |= RT2560_DROP_NOT_TO_ME; 2753 } 2754 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2755 2756 /* clear old FCS and Rx FIFO errors */ 2757 RAL_READ(sc, RT2560_CNT0); 2758 RAL_READ(sc, RT2560_CNT4); 2759 2760 /* clear any pending interrupts */ 2761 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2762 2763 /* enable interrupts */ 2764 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2765 2766 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2767 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2768 2769 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2770 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2771 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2772 } else 2773 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2774 2775 RAL_UNLOCK(sc); 2776#undef N 2777} 2778 2779void 2780rt2560_stop(void *arg) 2781{ 2782 struct rt2560_softc *sc = arg; 2783 struct ieee80211com *ic = &sc->sc_ic; 2784 struct ifnet *ifp = ic->ic_ifp; 2785 volatile int *flags = &sc->sc_flags; 2786 2787 while (*flags & RAL_INPUT_RUNNING) { 2788 tsleep(sc, 0, "ralrunning", hz/10); 2789 } 2790 2791 RAL_LOCK(sc); 2792 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 2793 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2794 sc->sc_tx_timer = 0; 2795 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2796 2797 /* abort Tx */ 2798 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2799 2800 /* disable Rx */ 2801 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2802 2803 /* reset ASIC (imply reset BBP) */ 2804 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2805 RAL_WRITE(sc, RT2560_CSR1, 0); 2806 2807 /* disable interrupts */ 2808 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2809 2810 /* reset Tx and Rx rings */ 2811 rt2560_reset_tx_ring(sc, &sc->txq); 2812 rt2560_reset_tx_ring(sc, &sc->atimq); 2813 rt2560_reset_tx_ring(sc, &sc->prioq); 2814 rt2560_reset_tx_ring(sc, &sc->bcnq); 2815 rt2560_reset_rx_ring(sc, &sc->rxq); 2816 } 2817 RAL_UNLOCK(sc); 2818} 2819 2820static int 2821rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2822 const struct ieee80211_bpf_params *params) 2823{ 2824 struct ieee80211com *ic = ni->ni_ic; 2825 struct ifnet *ifp = ic->ic_ifp; 2826 struct rt2560_softc *sc = ifp->if_softc; 2827 2828 RAL_LOCK(sc); 2829 2830 /* prevent management frames from being sent if we're not ready */ 2831 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2832 RAL_UNLOCK(sc); 2833 m_freem(m); 2834 ieee80211_free_node(ni); 2835 return ENETDOWN; 2836 } 2837 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2838 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2839 RAL_UNLOCK(sc); 2840 m_freem(m); 2841 ieee80211_free_node(ni); 2842 return ENOBUFS; /* XXX */ 2843 } 2844 2845 if (bpf_peers_present(ic->ic_rawbpf)) 2846 bpf_mtap(ic->ic_rawbpf, m); 2847 2848 ifp->if_opackets++; 2849 2850 if (params == NULL) { 2851 /* 2852 * Legacy path; interpret frame contents to decide 2853 * precisely how to send the frame. 2854 */ 2855 if (rt2560_tx_mgt(sc, m, ni) != 0) 2856 goto bad; 2857 } else { 2858 /* 2859 * Caller supplied explicit parameters to use in 2860 * sending the frame. 2861 */ 2862 if (rt2560_tx_raw(sc, m, ni, params)) 2863 goto bad; 2864 } 2865 sc->sc_tx_timer = 5; 2866 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc); 2867 2868 RAL_UNLOCK(sc); 2869 2870 return 0; 2871bad: 2872 ifp->if_oerrors++; 2873 ieee80211_free_node(ni); 2874 RAL_UNLOCK(sc); 2875 return EIO; /* XXX */ 2876} 2877 2878