rt2560.c revision 164982
1/* $FreeBSD: head/sys/dev/ral/rt2560.c 164982 2006-12-07 15:24:38Z 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 164982 2006-12-07 15:24:38Z 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 57#include <netinet/in.h> 58#include <netinet/in_systm.h> 59#include <netinet/in_var.h> 60#include <netinet/ip.h> 61#include <netinet/if_ether.h> 62 63#include <dev/ral/if_ralrate.h> 64#include <dev/ral/rt2560reg.h> 65#include <dev/ral/rt2560var.h> 66 67#ifdef RAL_DEBUG 68#define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 69#define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 70extern int ral_debug; 71#else 72#define DPRINTF(x) 73#define DPRINTFN(n, x) 74#endif 75 76static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 77 int); 78static int rt2560_alloc_tx_ring(struct rt2560_softc *, 79 struct rt2560_tx_ring *, int); 80static void rt2560_reset_tx_ring(struct rt2560_softc *, 81 struct rt2560_tx_ring *); 82static void rt2560_free_tx_ring(struct rt2560_softc *, 83 struct rt2560_tx_ring *); 84static int rt2560_alloc_rx_ring(struct rt2560_softc *, 85 struct rt2560_rx_ring *, int); 86static void rt2560_reset_rx_ring(struct rt2560_softc *, 87 struct rt2560_rx_ring *); 88static void rt2560_free_rx_ring(struct rt2560_softc *, 89 struct rt2560_rx_ring *); 90static struct ieee80211_node *rt2560_node_alloc( 91 struct ieee80211_node_table *); 92static int rt2560_media_change(struct ifnet *); 93static void rt2560_next_scan(void *); 94static void rt2560_iter_func(void *, struct ieee80211_node *); 95static void rt2560_update_rssadapt(void *); 96static int rt2560_newstate(struct ieee80211com *, 97 enum ieee80211_state, int); 98static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 99static void rt2560_encryption_intr(struct rt2560_softc *); 100static void rt2560_tx_intr(struct rt2560_softc *); 101static void rt2560_prio_intr(struct rt2560_softc *); 102static void rt2560_decryption_intr(struct rt2560_softc *); 103static void rt2560_rx_intr(struct rt2560_softc *); 104static void rt2560_beacon_expire(struct rt2560_softc *); 105static void rt2560_wakeup_expire(struct rt2560_softc *); 106static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 107static int rt2560_ack_rate(struct ieee80211com *, int); 108static uint16_t rt2560_txtime(int, int, uint32_t); 109static uint8_t rt2560_plcp_signal(int); 110static void rt2560_setup_tx_desc(struct rt2560_softc *, 111 struct rt2560_tx_desc *, uint32_t, int, int, int, 112 bus_addr_t); 113static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 114 struct ieee80211_node *); 115static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 116 struct ieee80211_node *); 117static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 118 struct ieee80211_frame *, uint16_t); 119static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 120 struct ieee80211_node *); 121static void rt2560_start(struct ifnet *); 122static void rt2560_watchdog(struct ifnet *); 123static int rt2560_reset(struct ifnet *); 124static int rt2560_ioctl(struct ifnet *, u_long, caddr_t); 125static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 126 uint8_t); 127static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 128static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 129 uint32_t); 130static void rt2560_set_chan(struct rt2560_softc *, 131 struct ieee80211_channel *); 132#if 0 133static void rt2560_disable_rf_tune(struct rt2560_softc *); 134#endif 135static void rt2560_enable_tsf_sync(struct rt2560_softc *); 136static void rt2560_update_plcp(struct rt2560_softc *); 137static void rt2560_update_slot(struct ifnet *); 138static void rt2560_set_basicrates(struct rt2560_softc *); 139static void rt2560_update_led(struct rt2560_softc *, int, int); 140static void rt2560_set_bssid(struct rt2560_softc *, uint8_t *); 141static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 142static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 143static void rt2560_update_promisc(struct rt2560_softc *); 144static const char *rt2560_get_rf(int); 145static void rt2560_read_eeprom(struct rt2560_softc *); 146static int rt2560_bbp_init(struct rt2560_softc *); 147static void rt2560_set_txantenna(struct rt2560_softc *, int); 148static void rt2560_set_rxantenna(struct rt2560_softc *, int); 149static void rt2560_init(void *); 150static void rt2560_stop(void *); 151static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *, 152 const struct ieee80211_bpf_params *); 153 154/* 155 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 156 */ 157static const struct ieee80211_rateset rt2560_rateset_11a = 158 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 159 160static const struct ieee80211_rateset rt2560_rateset_11b = 161 { 4, { 2, 4, 11, 22 } }; 162 163static const struct ieee80211_rateset rt2560_rateset_11g = 164 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 165 166static const struct { 167 uint32_t reg; 168 uint32_t val; 169} rt2560_def_mac[] = { 170 RT2560_DEF_MAC 171}; 172 173static const struct { 174 uint8_t reg; 175 uint8_t val; 176} rt2560_def_bbp[] = { 177 RT2560_DEF_BBP 178}; 179 180static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 181static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 182static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 183static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 184static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 185static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 186static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 187static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 188 189static const struct { 190 uint8_t chan; 191 uint32_t r1, r2, r4; 192} rt2560_rf5222[] = { 193 RT2560_RF5222 194}; 195 196int 197rt2560_attach(device_t dev, int id) 198{ 199 struct rt2560_softc *sc = device_get_softc(dev); 200 struct ieee80211com *ic = &sc->sc_ic; 201 struct ifnet *ifp; 202 int error, i; 203 204 sc->sc_dev = dev; 205 206 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 207 MTX_DEF | MTX_RECURSE); 208 209 callout_init(&sc->scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 210 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 211 212 /* retrieve RT2560 rev. no */ 213 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 214 215 /* retrieve MAC address */ 216 rt2560_get_macaddr(sc, ic->ic_myaddr); 217 218 /* retrieve RF rev. no and various other things from EEPROM */ 219 rt2560_read_eeprom(sc); 220 221 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 222 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 223 224 /* 225 * Allocate Tx and Rx rings. 226 */ 227 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 228 if (error != 0) { 229 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 230 goto fail1; 231 } 232 233 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 234 if (error != 0) { 235 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 236 goto fail2; 237 } 238 239 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 240 if (error != 0) { 241 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 242 goto fail3; 243 } 244 245 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 246 if (error != 0) { 247 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 248 goto fail4; 249 } 250 251 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 252 if (error != 0) { 253 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 254 goto fail5; 255 } 256 257 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 258 if (ifp == NULL) { 259 device_printf(sc->sc_dev, "can not if_alloc()\n"); 260 goto fail6; 261 } 262 263 ifp->if_softc = sc; 264 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 265 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 266 ifp->if_init = rt2560_init; 267 ifp->if_ioctl = rt2560_ioctl; 268 ifp->if_start = rt2560_start; 269 ifp->if_watchdog = rt2560_watchdog; 270 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 271 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 272 IFQ_SET_READY(&ifp->if_snd); 273 274 ic->ic_ifp = ifp; 275 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 276 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 277 ic->ic_state = IEEE80211_S_INIT; 278 279 /* set device capabilities */ 280 ic->ic_caps = 281 IEEE80211_C_IBSS | /* IBSS mode supported */ 282 IEEE80211_C_MONITOR | /* monitor mode supported */ 283 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 284 IEEE80211_C_TXPMGT | /* tx power management */ 285 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 286 IEEE80211_C_SHSLOT | /* short slot time supported */ 287 IEEE80211_C_WPA; /* 802.11i */ 288 289 if (sc->rf_rev == RT2560_RF_5222) { 290 /* set supported .11a rates */ 291 ic->ic_sup_rates[IEEE80211_MODE_11A] = rt2560_rateset_11a; 292 293 /* set supported .11a channels */ 294 for (i = 36; i <= 64; i += 4) { 295 ic->ic_channels[i].ic_freq = 296 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 297 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 298 } 299 for (i = 100; i <= 140; i += 4) { 300 ic->ic_channels[i].ic_freq = 301 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 302 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 303 } 304 for (i = 149; i <= 161; i += 4) { 305 ic->ic_channels[i].ic_freq = 306 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 307 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 308 } 309 } 310 311 /* set supported .11b and .11g rates */ 312 ic->ic_sup_rates[IEEE80211_MODE_11B] = rt2560_rateset_11b; 313 ic->ic_sup_rates[IEEE80211_MODE_11G] = rt2560_rateset_11g; 314 315 /* set supported .11b and .11g channels (1 through 14) */ 316 for (i = 1; i <= 14; i++) { 317 ic->ic_channels[i].ic_freq = 318 ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ); 319 ic->ic_channels[i].ic_flags = 320 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 321 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 322 } 323 324 ieee80211_ifattach(ic); 325 ic->ic_node_alloc = rt2560_node_alloc; 326 ic->ic_updateslot = rt2560_update_slot; 327 ic->ic_reset = rt2560_reset; 328 /* enable s/w bmiss handling in sta mode */ 329 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 330 331 /* override state transition machine */ 332 sc->sc_newstate = ic->ic_newstate; 333 ic->ic_newstate = rt2560_newstate; 334 ic->ic_raw_xmit = rt2560_raw_xmit; 335 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 336 337 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 338 sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf); 339 340 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 341 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 342 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 343 344 sc->sc_txtap_len = sizeof sc->sc_txtapu; 345 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 346 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 347 348 /* 349 * Add a few sysctl knobs. 350 */ 351 sc->dwelltime = 200; 352 353 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 354 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 355 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 356 357 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 358 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 359 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 360 361 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 362 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 363 CTLFLAG_RW, &sc->dwelltime, 0, 364 "channel dwell time (ms) for AP/station scanning"); 365 366 if (bootverbose) 367 ieee80211_announce(ic); 368 369 return 0; 370 371fail6: rt2560_free_rx_ring(sc, &sc->rxq); 372fail5: rt2560_free_tx_ring(sc, &sc->bcnq); 373fail4: rt2560_free_tx_ring(sc, &sc->prioq); 374fail3: rt2560_free_tx_ring(sc, &sc->atimq); 375fail2: rt2560_free_tx_ring(sc, &sc->txq); 376fail1: mtx_destroy(&sc->sc_mtx); 377 378 return ENXIO; 379} 380 381int 382rt2560_detach(void *xsc) 383{ 384 struct rt2560_softc *sc = xsc; 385 struct ieee80211com *ic = &sc->sc_ic; 386 struct ifnet *ifp = ic->ic_ifp; 387 388 rt2560_stop(sc); 389 callout_stop(&sc->scan_ch); 390 callout_stop(&sc->rssadapt_ch); 391 392 bpfdetach(ifp); 393 ieee80211_ifdetach(ic); 394 395 rt2560_free_tx_ring(sc, &sc->txq); 396 rt2560_free_tx_ring(sc, &sc->atimq); 397 rt2560_free_tx_ring(sc, &sc->prioq); 398 rt2560_free_tx_ring(sc, &sc->bcnq); 399 rt2560_free_rx_ring(sc, &sc->rxq); 400 401 if_free(ifp); 402 403 mtx_destroy(&sc->sc_mtx); 404 405 return 0; 406} 407 408void 409rt2560_shutdown(void *xsc) 410{ 411 struct rt2560_softc *sc = xsc; 412 413 rt2560_stop(sc); 414} 415 416void 417rt2560_suspend(void *xsc) 418{ 419 struct rt2560_softc *sc = xsc; 420 421 rt2560_stop(sc); 422} 423 424void 425rt2560_resume(void *xsc) 426{ 427 struct rt2560_softc *sc = xsc; 428 struct ifnet *ifp = sc->sc_ic.ic_ifp; 429 430 if (ifp->if_flags & IFF_UP) { 431 ifp->if_init(ifp->if_softc); 432 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 433 ifp->if_start(ifp); 434 } 435} 436 437static void 438rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 439{ 440 if (error != 0) 441 return; 442 443 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 444 445 *(bus_addr_t *)arg = segs[0].ds_addr; 446} 447 448static int 449rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 450 int count) 451{ 452 int i, error; 453 454 ring->count = count; 455 ring->queued = 0; 456 ring->cur = ring->next = 0; 457 ring->cur_encrypt = ring->next_encrypt = 0; 458 459 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 460 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_TX_DESC_SIZE, 1, 461 count * RT2560_TX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 462 if (error != 0) { 463 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 464 goto fail; 465 } 466 467 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 468 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 469 if (error != 0) { 470 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 471 goto fail; 472 } 473 474 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 475 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 476 0); 477 if (error != 0) { 478 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 479 goto fail; 480 } 481 482 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 483 M_NOWAIT | M_ZERO); 484 if (ring->data == NULL) { 485 device_printf(sc->sc_dev, "could not allocate soft data\n"); 486 error = ENOMEM; 487 goto fail; 488 } 489 490 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 491 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2560_MAX_SCATTER, 492 MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 493 if (error != 0) { 494 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 495 goto fail; 496 } 497 498 for (i = 0; i < count; i++) { 499 error = bus_dmamap_create(ring->data_dmat, 0, 500 &ring->data[i].map); 501 if (error != 0) { 502 device_printf(sc->sc_dev, "could not create DMA map\n"); 503 goto fail; 504 } 505 } 506 507 return 0; 508 509fail: rt2560_free_tx_ring(sc, ring); 510 return error; 511} 512 513static void 514rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 515{ 516 struct rt2560_tx_desc *desc; 517 struct rt2560_tx_data *data; 518 int i; 519 520 for (i = 0; i < ring->count; i++) { 521 desc = &ring->desc[i]; 522 data = &ring->data[i]; 523 524 if (data->m != NULL) { 525 bus_dmamap_sync(ring->data_dmat, data->map, 526 BUS_DMASYNC_POSTWRITE); 527 bus_dmamap_unload(ring->data_dmat, data->map); 528 m_freem(data->m); 529 data->m = NULL; 530 } 531 532 if (data->ni != NULL) { 533 ieee80211_free_node(data->ni); 534 data->ni = NULL; 535 } 536 537 desc->flags = 0; 538 } 539 540 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 541 542 ring->queued = 0; 543 ring->cur = ring->next = 0; 544 ring->cur_encrypt = ring->next_encrypt = 0; 545} 546 547static void 548rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 549{ 550 struct rt2560_tx_data *data; 551 int i; 552 553 if (ring->desc != NULL) { 554 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 555 BUS_DMASYNC_POSTWRITE); 556 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 557 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 558 } 559 560 if (ring->desc_dmat != NULL) 561 bus_dma_tag_destroy(ring->desc_dmat); 562 563 if (ring->data != NULL) { 564 for (i = 0; i < ring->count; i++) { 565 data = &ring->data[i]; 566 567 if (data->m != NULL) { 568 bus_dmamap_sync(ring->data_dmat, data->map, 569 BUS_DMASYNC_POSTWRITE); 570 bus_dmamap_unload(ring->data_dmat, data->map); 571 m_freem(data->m); 572 } 573 574 if (data->ni != NULL) 575 ieee80211_free_node(data->ni); 576 577 if (data->map != NULL) 578 bus_dmamap_destroy(ring->data_dmat, data->map); 579 } 580 581 free(ring->data, M_DEVBUF); 582 } 583 584 if (ring->data_dmat != NULL) 585 bus_dma_tag_destroy(ring->data_dmat); 586} 587 588static int 589rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 590 int count) 591{ 592 struct rt2560_rx_desc *desc; 593 struct rt2560_rx_data *data; 594 bus_addr_t physaddr; 595 int i, error; 596 597 ring->count = count; 598 ring->cur = ring->next = 0; 599 ring->cur_decrypt = 0; 600 601 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 602 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_RX_DESC_SIZE, 1, 603 count * RT2560_RX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 604 if (error != 0) { 605 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 606 goto fail; 607 } 608 609 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 610 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 611 if (error != 0) { 612 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 613 goto fail; 614 } 615 616 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 617 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 618 0); 619 if (error != 0) { 620 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 621 goto fail; 622 } 623 624 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 625 M_NOWAIT | M_ZERO); 626 if (ring->data == NULL) { 627 device_printf(sc->sc_dev, "could not allocate soft data\n"); 628 error = ENOMEM; 629 goto fail; 630 } 631 632 /* 633 * Pre-allocate Rx buffers and populate Rx ring. 634 */ 635 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 636 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, NULL, 637 NULL, &ring->data_dmat); 638 if (error != 0) { 639 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 640 goto fail; 641 } 642 643 for (i = 0; i < count; i++) { 644 desc = &sc->rxq.desc[i]; 645 data = &sc->rxq.data[i]; 646 647 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 648 if (error != 0) { 649 device_printf(sc->sc_dev, "could not create DMA map\n"); 650 goto fail; 651 } 652 653 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 654 if (data->m == NULL) { 655 device_printf(sc->sc_dev, 656 "could not allocate rx mbuf\n"); 657 error = ENOMEM; 658 goto fail; 659 } 660 661 error = bus_dmamap_load(ring->data_dmat, data->map, 662 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 663 &physaddr, 0); 664 if (error != 0) { 665 device_printf(sc->sc_dev, 666 "could not load rx buf DMA map"); 667 goto fail; 668 } 669 670 desc->flags = htole32(RT2560_RX_BUSY); 671 desc->physaddr = htole32(physaddr); 672 } 673 674 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 675 676 return 0; 677 678fail: rt2560_free_rx_ring(sc, ring); 679 return error; 680} 681 682static void 683rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 684{ 685 int i; 686 687 for (i = 0; i < ring->count; i++) { 688 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 689 ring->data[i].drop = 0; 690 } 691 692 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 693 694 ring->cur = ring->next = 0; 695 ring->cur_decrypt = 0; 696} 697 698static void 699rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 700{ 701 struct rt2560_rx_data *data; 702 int i; 703 704 if (ring->desc != NULL) { 705 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 706 BUS_DMASYNC_POSTWRITE); 707 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 708 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 709 } 710 711 if (ring->desc_dmat != NULL) 712 bus_dma_tag_destroy(ring->desc_dmat); 713 714 if (ring->data != NULL) { 715 for (i = 0; i < ring->count; i++) { 716 data = &ring->data[i]; 717 718 if (data->m != NULL) { 719 bus_dmamap_sync(ring->data_dmat, data->map, 720 BUS_DMASYNC_POSTREAD); 721 bus_dmamap_unload(ring->data_dmat, data->map); 722 m_freem(data->m); 723 } 724 725 if (data->map != NULL) 726 bus_dmamap_destroy(ring->data_dmat, data->map); 727 } 728 729 free(ring->data, M_DEVBUF); 730 } 731 732 if (ring->data_dmat != NULL) 733 bus_dma_tag_destroy(ring->data_dmat); 734} 735 736static struct ieee80211_node * 737rt2560_node_alloc(struct ieee80211_node_table *nt) 738{ 739 struct rt2560_node *rn; 740 741 rn = malloc(sizeof (struct rt2560_node), M_80211_NODE, 742 M_NOWAIT | M_ZERO); 743 744 return (rn != NULL) ? &rn->ni : NULL; 745} 746 747static int 748rt2560_media_change(struct ifnet *ifp) 749{ 750 struct rt2560_softc *sc = ifp->if_softc; 751 int error; 752 753 error = ieee80211_media_change(ifp); 754 if (error != ENETRESET) 755 return error; 756 757 if ((ifp->if_flags & IFF_UP) && 758 (ifp->if_drv_flags & IFF_DRV_RUNNING)) 759 rt2560_init(sc); 760 761 return 0; 762} 763 764/* 765 * This function is called periodically (every 200ms) during scanning to 766 * switch from one channel to another. 767 */ 768static void 769rt2560_next_scan(void *arg) 770{ 771 struct rt2560_softc *sc = arg; 772 struct ieee80211com *ic = &sc->sc_ic; 773 774 if (ic->ic_state == IEEE80211_S_SCAN) 775 ieee80211_next_scan(ic); 776} 777 778/* 779 * This function is called for each node present in the node station table. 780 */ 781static void 782rt2560_iter_func(void *arg, struct ieee80211_node *ni) 783{ 784 struct rt2560_node *rn = (struct rt2560_node *)ni; 785 786 ral_rssadapt_updatestats(&rn->rssadapt); 787} 788 789/* 790 * This function is called periodically (every 100ms) in RUN state to update 791 * the rate adaptation statistics. 792 */ 793static void 794rt2560_update_rssadapt(void *arg) 795{ 796 struct rt2560_softc *sc = arg; 797 struct ieee80211com *ic = &sc->sc_ic; 798 799 RAL_LOCK(sc); 800 801 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 802 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 803 804 RAL_UNLOCK(sc); 805} 806 807static int 808rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 809{ 810 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 811 enum ieee80211_state ostate; 812 struct ieee80211_node *ni; 813 struct mbuf *m; 814 int error = 0; 815 816 ostate = ic->ic_state; 817 callout_stop(&sc->scan_ch); 818 819 switch (nstate) { 820 case IEEE80211_S_INIT: 821 callout_stop(&sc->rssadapt_ch); 822 823 if (ostate == IEEE80211_S_RUN) { 824 /* abort TSF synchronization */ 825 RAL_WRITE(sc, RT2560_CSR14, 0); 826 827 /* turn association led off */ 828 rt2560_update_led(sc, 0, 0); 829 } 830 break; 831 832 case IEEE80211_S_SCAN: 833 rt2560_set_chan(sc, ic->ic_curchan); 834 callout_reset(&sc->scan_ch, (sc->dwelltime * hz) / 1000, 835 rt2560_next_scan, sc); 836 break; 837 838 case IEEE80211_S_AUTH: 839 rt2560_set_chan(sc, ic->ic_curchan); 840 break; 841 842 case IEEE80211_S_ASSOC: 843 rt2560_set_chan(sc, ic->ic_curchan); 844 break; 845 846 case IEEE80211_S_RUN: 847 rt2560_set_chan(sc, ic->ic_curchan); 848 849 ni = ic->ic_bss; 850 851 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 852 rt2560_update_plcp(sc); 853 rt2560_set_basicrates(sc); 854 rt2560_set_bssid(sc, ni->ni_bssid); 855 } 856 857 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 858 ic->ic_opmode == IEEE80211_M_IBSS) { 859 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 860 if (m == NULL) { 861 device_printf(sc->sc_dev, 862 "could not allocate beacon\n"); 863 error = ENOBUFS; 864 break; 865 } 866 867 ieee80211_ref_node(ni); 868 error = rt2560_tx_bcn(sc, m, ni); 869 if (error != 0) 870 break; 871 } 872 873 /* turn assocation led on */ 874 rt2560_update_led(sc, 1, 0); 875 876 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 877 callout_reset(&sc->rssadapt_ch, hz / 10, 878 rt2560_update_rssadapt, sc); 879 880 rt2560_enable_tsf_sync(sc); 881 } 882 break; 883 } 884 885 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 886} 887 888/* 889 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 890 * 93C66). 891 */ 892static uint16_t 893rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 894{ 895 uint32_t tmp; 896 uint16_t val; 897 int n; 898 899 /* clock C once before the first command */ 900 RT2560_EEPROM_CTL(sc, 0); 901 902 RT2560_EEPROM_CTL(sc, RT2560_S); 903 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 904 RT2560_EEPROM_CTL(sc, RT2560_S); 905 906 /* write start bit (1) */ 907 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 908 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 909 910 /* write READ opcode (10) */ 911 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 912 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 913 RT2560_EEPROM_CTL(sc, RT2560_S); 914 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 915 916 /* write address (A5-A0 or A7-A0) */ 917 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 918 for (; n >= 0; n--) { 919 RT2560_EEPROM_CTL(sc, RT2560_S | 920 (((addr >> n) & 1) << RT2560_SHIFT_D)); 921 RT2560_EEPROM_CTL(sc, RT2560_S | 922 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 923 } 924 925 RT2560_EEPROM_CTL(sc, RT2560_S); 926 927 /* read data Q15-Q0 */ 928 val = 0; 929 for (n = 15; n >= 0; n--) { 930 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 931 tmp = RAL_READ(sc, RT2560_CSR21); 932 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 933 RT2560_EEPROM_CTL(sc, RT2560_S); 934 } 935 936 RT2560_EEPROM_CTL(sc, 0); 937 938 /* clear Chip Select and clock C */ 939 RT2560_EEPROM_CTL(sc, RT2560_S); 940 RT2560_EEPROM_CTL(sc, 0); 941 RT2560_EEPROM_CTL(sc, RT2560_C); 942 943 return val; 944} 945 946/* 947 * Some frames were processed by the hardware cipher engine and are ready for 948 * transmission. 949 */ 950static void 951rt2560_encryption_intr(struct rt2560_softc *sc) 952{ 953 struct rt2560_tx_desc *desc; 954 int hw; 955 956 /* retrieve last descriptor index processed by cipher engine */ 957 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 958 hw /= RT2560_TX_DESC_SIZE; 959 960 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 961 BUS_DMASYNC_POSTREAD); 962 963 for (; sc->txq.next_encrypt != hw;) { 964 desc = &sc->txq.desc[sc->txq.next_encrypt]; 965 966 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 967 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 968 break; 969 970 /* for TKIP, swap eiv field to fix a bug in ASIC */ 971 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 972 RT2560_TX_CIPHER_TKIP) 973 desc->eiv = bswap32(desc->eiv); 974 975 /* mark the frame ready for transmission */ 976 desc->flags |= htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 977 978 DPRINTFN(15, ("encryption done idx=%u\n", 979 sc->txq.next_encrypt)); 980 981 sc->txq.next_encrypt = 982 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 983 } 984 985 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 986 BUS_DMASYNC_PREWRITE); 987 988 /* kick Tx */ 989 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 990} 991 992static void 993rt2560_tx_intr(struct rt2560_softc *sc) 994{ 995 struct ieee80211com *ic = &sc->sc_ic; 996 struct ifnet *ifp = ic->ic_ifp; 997 struct rt2560_tx_desc *desc; 998 struct rt2560_tx_data *data; 999 struct rt2560_node *rn; 1000 1001 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1002 BUS_DMASYNC_POSTREAD); 1003 1004 for (;;) { 1005 desc = &sc->txq.desc[sc->txq.next]; 1006 data = &sc->txq.data[sc->txq.next]; 1007 1008 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1009 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 1010 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1011 break; 1012 1013 rn = (struct rt2560_node *)data->ni; 1014 1015 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1016 case RT2560_TX_SUCCESS: 1017 DPRINTFN(10, ("data frame sent successfully\n")); 1018 if (data->id.id_node != NULL) { 1019 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 1020 &data->id); 1021 } 1022 ifp->if_opackets++; 1023 break; 1024 1025 case RT2560_TX_SUCCESS_RETRY: 1026 DPRINTFN(9, ("data frame sent after %u retries\n", 1027 (le32toh(desc->flags) >> 5) & 0x7)); 1028 ifp->if_opackets++; 1029 break; 1030 1031 case RT2560_TX_FAIL_RETRY: 1032 DPRINTFN(9, ("sending data frame failed (too much " 1033 "retries)\n")); 1034 if (data->id.id_node != NULL) { 1035 ral_rssadapt_lower_rate(ic, data->ni, 1036 &rn->rssadapt, &data->id); 1037 } 1038 ifp->if_oerrors++; 1039 break; 1040 1041 case RT2560_TX_FAIL_INVALID: 1042 case RT2560_TX_FAIL_OTHER: 1043 default: 1044 device_printf(sc->sc_dev, "sending data frame failed " 1045 "0x%08x\n", le32toh(desc->flags)); 1046 ifp->if_oerrors++; 1047 } 1048 1049 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1050 BUS_DMASYNC_POSTWRITE); 1051 bus_dmamap_unload(sc->txq.data_dmat, data->map); 1052 m_freem(data->m); 1053 data->m = NULL; 1054 ieee80211_free_node(data->ni); 1055 data->ni = NULL; 1056 1057 /* descriptor is no longer valid */ 1058 desc->flags &= ~htole32(RT2560_TX_VALID); 1059 1060 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 1061 1062 sc->txq.queued--; 1063 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 1064 } 1065 1066 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1067 BUS_DMASYNC_PREWRITE); 1068 1069 sc->sc_tx_timer = 0; 1070 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1071 rt2560_start(ifp); 1072} 1073 1074static void 1075rt2560_prio_intr(struct rt2560_softc *sc) 1076{ 1077 struct ieee80211com *ic = &sc->sc_ic; 1078 struct ifnet *ifp = ic->ic_ifp; 1079 struct rt2560_tx_desc *desc; 1080 struct rt2560_tx_data *data; 1081 1082 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1083 BUS_DMASYNC_POSTREAD); 1084 1085 for (;;) { 1086 desc = &sc->prioq.desc[sc->prioq.next]; 1087 data = &sc->prioq.data[sc->prioq.next]; 1088 1089 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1090 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1091 break; 1092 1093 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1094 case RT2560_TX_SUCCESS: 1095 DPRINTFN(10, ("mgt frame sent successfully\n")); 1096 break; 1097 1098 case RT2560_TX_SUCCESS_RETRY: 1099 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1100 (le32toh(desc->flags) >> 5) & 0x7)); 1101 break; 1102 1103 case RT2560_TX_FAIL_RETRY: 1104 DPRINTFN(9, ("sending mgt frame failed (too much " 1105 "retries)\n")); 1106 break; 1107 1108 case RT2560_TX_FAIL_INVALID: 1109 case RT2560_TX_FAIL_OTHER: 1110 default: 1111 device_printf(sc->sc_dev, "sending mgt frame failed " 1112 "0x%08x\n", le32toh(desc->flags)); 1113 } 1114 1115 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1116 BUS_DMASYNC_POSTWRITE); 1117 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1118 m_freem(data->m); 1119 data->m = NULL; 1120 ieee80211_free_node(data->ni); 1121 data->ni = NULL; 1122 1123 /* descriptor is no longer valid */ 1124 desc->flags &= ~htole32(RT2560_TX_VALID); 1125 1126 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1127 1128 sc->prioq.queued--; 1129 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1130 } 1131 1132 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1133 BUS_DMASYNC_PREWRITE); 1134 1135 sc->sc_tx_timer = 0; 1136 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1137 rt2560_start(ifp); 1138} 1139 1140/* 1141 * Some frames were processed by the hardware cipher engine and are ready for 1142 * transmission to the IEEE802.11 layer. 1143 */ 1144static void 1145rt2560_decryption_intr(struct rt2560_softc *sc) 1146{ 1147 struct ieee80211com *ic = &sc->sc_ic; 1148 struct ifnet *ifp = ic->ic_ifp; 1149 struct rt2560_rx_desc *desc; 1150 struct rt2560_rx_data *data; 1151 bus_addr_t physaddr; 1152 struct ieee80211_frame *wh; 1153 struct ieee80211_node *ni; 1154 struct rt2560_node *rn; 1155 struct mbuf *mnew, *m; 1156 int hw, error; 1157 1158 /* retrieve last decriptor index processed by cipher engine */ 1159 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1160 hw /= RT2560_RX_DESC_SIZE; 1161 1162 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1163 BUS_DMASYNC_POSTREAD); 1164 1165 for (; sc->rxq.cur_decrypt != hw;) { 1166 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1167 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1168 1169 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1170 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1171 break; 1172 1173 if (data->drop) { 1174 ifp->if_ierrors++; 1175 goto skip; 1176 } 1177 1178 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1179 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1180 ifp->if_ierrors++; 1181 goto skip; 1182 } 1183 1184 /* 1185 * Try to allocate a new mbuf for this ring element and load it 1186 * before processing the current mbuf. If the ring element 1187 * cannot be loaded, drop the received packet and reuse the old 1188 * mbuf. In the unlikely case that the old mbuf can't be 1189 * reloaded either, explicitly panic. 1190 */ 1191 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1192 if (mnew == NULL) { 1193 ifp->if_ierrors++; 1194 goto skip; 1195 } 1196 1197 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1198 BUS_DMASYNC_POSTREAD); 1199 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1200 1201 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1202 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1203 &physaddr, 0); 1204 if (error != 0) { 1205 m_freem(mnew); 1206 1207 /* try to reload the old mbuf */ 1208 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1209 mtod(data->m, void *), MCLBYTES, 1210 rt2560_dma_map_addr, &physaddr, 0); 1211 if (error != 0) { 1212 /* very unlikely that it will fail... */ 1213 panic("%s: could not load old rx mbuf", 1214 device_get_name(sc->sc_dev)); 1215 } 1216 ifp->if_ierrors++; 1217 goto skip; 1218 } 1219 1220 /* 1221 * New mbuf successfully loaded, update Rx ring and continue 1222 * processing. 1223 */ 1224 m = data->m; 1225 data->m = mnew; 1226 desc->physaddr = htole32(physaddr); 1227 1228 /* finalize mbuf */ 1229 m->m_pkthdr.rcvif = ifp; 1230 m->m_pkthdr.len = m->m_len = 1231 (le32toh(desc->flags) >> 16) & 0xfff; 1232 1233 if (bpf_peers_present(sc->sc_drvbpf)) { 1234 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1235 uint32_t tsf_lo, tsf_hi; 1236 1237 /* get timestamp (low and high 32 bits) */ 1238 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1239 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1240 1241 tap->wr_tsf = 1242 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1243 tap->wr_flags = 0; 1244 tap->wr_rate = rt2560_rxrate(desc); 1245 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1246 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1247 tap->wr_antenna = sc->rx_ant; 1248 tap->wr_antsignal = desc->rssi; 1249 1250 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1251 } 1252 1253 wh = mtod(m, struct ieee80211_frame *); 1254 ni = ieee80211_find_rxnode(ic, 1255 (struct ieee80211_frame_min *)wh); 1256 1257 /* send the frame to the 802.11 layer */ 1258 ieee80211_input(ic, m, ni, desc->rssi, 0); 1259 1260 /* give rssi to the rate adatation algorithm */ 1261 rn = (struct rt2560_node *)ni; 1262 ral_rssadapt_input(ic, ni, &rn->rssadapt, desc->rssi); 1263 1264 /* node is no longer needed */ 1265 ieee80211_free_node(ni); 1266 1267skip: desc->flags = htole32(RT2560_RX_BUSY); 1268 1269 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1270 1271 sc->rxq.cur_decrypt = 1272 (sc->rxq.cur_decrypt + 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 1279/* 1280 * Some frames were received. Pass them to the hardware cipher engine before 1281 * sending them to the 802.11 layer. 1282 */ 1283static void 1284rt2560_rx_intr(struct rt2560_softc *sc) 1285{ 1286 struct rt2560_rx_desc *desc; 1287 struct rt2560_rx_data *data; 1288 1289 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1290 BUS_DMASYNC_POSTREAD); 1291 1292 for (;;) { 1293 desc = &sc->rxq.desc[sc->rxq.cur]; 1294 data = &sc->rxq.data[sc->rxq.cur]; 1295 1296 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1297 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1298 break; 1299 1300 data->drop = 0; 1301 1302 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1303 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1304 /* 1305 * This should not happen since we did not request 1306 * to receive those frames when we filled RXCSR0. 1307 */ 1308 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1309 le32toh(desc->flags))); 1310 data->drop = 1; 1311 } 1312 1313 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1314 DPRINTFN(5, ("bad length\n")); 1315 data->drop = 1; 1316 } 1317 1318 /* mark the frame for decryption */ 1319 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1320 1321 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1322 1323 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1324 } 1325 1326 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1327 BUS_DMASYNC_PREWRITE); 1328 1329 /* kick decrypt */ 1330 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1331} 1332 1333/* 1334 * This function is called periodically in IBSS mode when a new beacon must be 1335 * sent out. 1336 */ 1337static void 1338rt2560_beacon_expire(struct rt2560_softc *sc) 1339{ 1340 struct ieee80211com *ic = &sc->sc_ic; 1341 struct rt2560_tx_data *data; 1342 1343 if (ic->ic_opmode != IEEE80211_M_IBSS && 1344 ic->ic_opmode != IEEE80211_M_HOSTAP) 1345 return; 1346 1347 data = &sc->bcnq.data[sc->bcnq.next]; 1348 1349 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1350 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1351 1352 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1353 1354 if (bpf_peers_present(ic->ic_rawbpf)) 1355 bpf_mtap(ic->ic_rawbpf, data->m); 1356 1357 rt2560_tx_bcn(sc, data->m, data->ni); 1358 1359 DPRINTFN(15, ("beacon expired\n")); 1360 1361 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1362} 1363 1364/* ARGSUSED */ 1365static void 1366rt2560_wakeup_expire(struct rt2560_softc *sc) 1367{ 1368 DPRINTFN(2, ("wakeup expired\n")); 1369} 1370 1371void 1372rt2560_intr(void *arg) 1373{ 1374 struct rt2560_softc *sc = arg; 1375 struct ifnet *ifp = sc->sc_ifp; 1376 uint32_t r; 1377 1378 RAL_LOCK(sc); 1379 1380 /* disable interrupts */ 1381 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1382 1383 /* don't re-enable interrupts if we're shutting down */ 1384 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1385 RAL_UNLOCK(sc); 1386 return; 1387 } 1388 1389 r = RAL_READ(sc, RT2560_CSR7); 1390 RAL_WRITE(sc, RT2560_CSR7, r); 1391 1392 if (r & RT2560_BEACON_EXPIRE) 1393 rt2560_beacon_expire(sc); 1394 1395 if (r & RT2560_WAKEUP_EXPIRE) 1396 rt2560_wakeup_expire(sc); 1397 1398 if (r & RT2560_ENCRYPTION_DONE) 1399 rt2560_encryption_intr(sc); 1400 1401 if (r & RT2560_TX_DONE) 1402 rt2560_tx_intr(sc); 1403 1404 if (r & RT2560_PRIO_DONE) 1405 rt2560_prio_intr(sc); 1406 1407 if (r & RT2560_DECRYPTION_DONE) 1408 rt2560_decryption_intr(sc); 1409 1410 if (r & RT2560_RX_DONE) 1411 rt2560_rx_intr(sc); 1412 1413 /* re-enable interrupts */ 1414 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1415 1416 RAL_UNLOCK(sc); 1417} 1418 1419/* quickly determine if a given rate is CCK or OFDM */ 1420#define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1421 1422#define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1423#define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1424 1425#define RAL_SIFS 10 /* us */ 1426 1427#define RT2560_TXRX_TURNAROUND 10 /* us */ 1428 1429/* 1430 * This function is only used by the Rx radiotap code. 1431 */ 1432static uint8_t 1433rt2560_rxrate(struct rt2560_rx_desc *desc) 1434{ 1435 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1436 /* reverse function of rt2560_plcp_signal */ 1437 switch (desc->rate) { 1438 case 0xb: return 12; 1439 case 0xf: return 18; 1440 case 0xa: return 24; 1441 case 0xe: return 36; 1442 case 0x9: return 48; 1443 case 0xd: return 72; 1444 case 0x8: return 96; 1445 case 0xc: return 108; 1446 } 1447 } else { 1448 if (desc->rate == 10) 1449 return 2; 1450 if (desc->rate == 20) 1451 return 4; 1452 if (desc->rate == 55) 1453 return 11; 1454 if (desc->rate == 110) 1455 return 22; 1456 } 1457 return 2; /* should not get there */ 1458} 1459 1460/* 1461 * Return the expected ack rate for a frame transmitted at rate `rate'. 1462 * XXX: this should depend on the destination node basic rate set. 1463 */ 1464static int 1465rt2560_ack_rate(struct ieee80211com *ic, int rate) 1466{ 1467 switch (rate) { 1468 /* CCK rates */ 1469 case 2: 1470 return 2; 1471 case 4: 1472 case 11: 1473 case 22: 1474 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1475 1476 /* OFDM rates */ 1477 case 12: 1478 case 18: 1479 return 12; 1480 case 24: 1481 case 36: 1482 return 24; 1483 case 48: 1484 case 72: 1485 case 96: 1486 case 108: 1487 return 48; 1488 } 1489 1490 /* default to 1Mbps */ 1491 return 2; 1492} 1493 1494/* 1495 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1496 * The function automatically determines the operating mode depending on the 1497 * given rate. `flags' indicates whether short preamble is in use or not. 1498 */ 1499static uint16_t 1500rt2560_txtime(int len, int rate, uint32_t flags) 1501{ 1502 uint16_t txtime; 1503 1504 if (RAL_RATE_IS_OFDM(rate)) { 1505 /* IEEE Std 802.11a-1999, pp. 37 */ 1506 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1507 txtime = 16 + 4 + 4 * txtime + 6; 1508 } else { 1509 /* IEEE Std 802.11b-1999, pp. 28 */ 1510 txtime = (16 * len + rate - 1) / rate; 1511 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1512 txtime += 72 + 24; 1513 else 1514 txtime += 144 + 48; 1515 } 1516 1517 return txtime; 1518} 1519 1520static uint8_t 1521rt2560_plcp_signal(int rate) 1522{ 1523 switch (rate) { 1524 /* CCK rates (returned values are device-dependent) */ 1525 case 2: return 0x0; 1526 case 4: return 0x1; 1527 case 11: return 0x2; 1528 case 22: return 0x3; 1529 1530 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1531 case 12: return 0xb; 1532 case 18: return 0xf; 1533 case 24: return 0xa; 1534 case 36: return 0xe; 1535 case 48: return 0x9; 1536 case 72: return 0xd; 1537 case 96: return 0x8; 1538 case 108: return 0xc; 1539 1540 /* unsupported rates (should not get there) */ 1541 default: return 0xff; 1542 } 1543} 1544 1545static void 1546rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1547 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1548{ 1549 struct ieee80211com *ic = &sc->sc_ic; 1550 uint16_t plcp_length; 1551 int remainder; 1552 1553 desc->flags = htole32(flags); 1554 desc->flags |= htole32(len << 16); 1555 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) : 1556 htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 1557 1558 desc->physaddr = htole32(physaddr); 1559 desc->wme = htole16( 1560 RT2560_AIFSN(2) | 1561 RT2560_LOGCWMIN(3) | 1562 RT2560_LOGCWMAX(8)); 1563 1564 /* setup PLCP fields */ 1565 desc->plcp_signal = rt2560_plcp_signal(rate); 1566 desc->plcp_service = 4; 1567 1568 len += IEEE80211_CRC_LEN; 1569 if (RAL_RATE_IS_OFDM(rate)) { 1570 desc->flags |= htole32(RT2560_TX_OFDM); 1571 1572 plcp_length = len & 0xfff; 1573 desc->plcp_length_hi = plcp_length >> 6; 1574 desc->plcp_length_lo = plcp_length & 0x3f; 1575 } else { 1576 plcp_length = (16 * len + rate - 1) / rate; 1577 if (rate == 22) { 1578 remainder = (16 * len) % 22; 1579 if (remainder != 0 && remainder < 7) 1580 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1581 } 1582 desc->plcp_length_hi = plcp_length >> 8; 1583 desc->plcp_length_lo = plcp_length & 0xff; 1584 1585 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1586 desc->plcp_signal |= 0x08; 1587 } 1588} 1589 1590static int 1591rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1592 struct ieee80211_node *ni) 1593{ 1594 struct ieee80211com *ic = &sc->sc_ic; 1595 struct rt2560_tx_desc *desc; 1596 struct rt2560_tx_data *data; 1597 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1598 int nsegs, rate, error; 1599 1600 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1601 data = &sc->bcnq.data[sc->bcnq.cur]; 1602 1603 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1604 1605 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0, 1606 segs, &nsegs, BUS_DMA_NOWAIT); 1607 if (error != 0) { 1608 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1609 error); 1610 m_freem(m0); 1611 return error; 1612 } 1613 1614 if (bpf_peers_present(sc->sc_drvbpf)) { 1615 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1616 1617 tap->wt_flags = 0; 1618 tap->wt_rate = rate; 1619 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1620 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1621 tap->wt_antenna = sc->tx_ant; 1622 1623 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1624 } 1625 1626 data->m = m0; 1627 data->ni = ni; 1628 1629 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1630 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr); 1631 1632 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1633 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1634 1635 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1636 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1637 BUS_DMASYNC_PREWRITE); 1638 1639 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1640 1641 return 0; 1642} 1643 1644static int 1645rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1646 struct ieee80211_node *ni) 1647{ 1648 struct ieee80211com *ic = &sc->sc_ic; 1649 struct rt2560_tx_desc *desc; 1650 struct rt2560_tx_data *data; 1651 struct ieee80211_frame *wh; 1652 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1653 uint16_t dur; 1654 uint32_t flags = 0; 1655 int nsegs, rate, error; 1656 1657 desc = &sc->prioq.desc[sc->prioq.cur]; 1658 data = &sc->prioq.data[sc->prioq.cur]; 1659 1660 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1661 1662 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1663 segs, &nsegs, 0); 1664 if (error != 0) { 1665 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1666 error); 1667 m_freem(m0); 1668 return error; 1669 } 1670 1671 if (bpf_peers_present(sc->sc_drvbpf)) { 1672 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1673 1674 tap->wt_flags = 0; 1675 tap->wt_rate = rate; 1676 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1677 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1678 tap->wt_antenna = sc->tx_ant; 1679 1680 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1681 } 1682 1683 data->m = m0; 1684 data->ni = ni; 1685 1686 wh = mtod(m0, struct ieee80211_frame *); 1687 1688 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1689 flags |= RT2560_TX_ACK; 1690 1691 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1692 RAL_SIFS; 1693 *(uint16_t *)wh->i_dur = htole16(dur); 1694 1695 /* tell hardware to add timestamp for probe responses */ 1696 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1697 IEEE80211_FC0_TYPE_MGT && 1698 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1699 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1700 flags |= RT2560_TX_TIMESTAMP; 1701 } 1702 1703 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, 1704 segs->ds_addr); 1705 1706 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1707 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1708 BUS_DMASYNC_PREWRITE); 1709 1710 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1711 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1712 1713 /* kick prio */ 1714 sc->prioq.queued++; 1715 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1716 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1717 1718 return 0; 1719} 1720 1721static int 1722rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0, 1723 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params) 1724{ 1725 struct ieee80211com *ic = &sc->sc_ic; 1726 struct rt2560_tx_desc *desc; 1727 struct rt2560_tx_data *data; 1728 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1729 uint32_t flags; 1730 int nsegs, rate, error; 1731 1732 desc = &sc->prioq.desc[sc->prioq.cur]; 1733 data = &sc->prioq.data[sc->prioq.cur]; 1734 1735 rate = params->ibp_rate0 & IEEE80211_RATE_VAL; 1736 /* XXX validate */ 1737 if (rate == 0) 1738 return EINVAL; 1739 1740 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1741 segs, &nsegs, 0); 1742 if (error != 0) { 1743 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1744 error); 1745 m_freem(m0); 1746 return error; 1747 } 1748 1749 if (bpf_peers_present(sc->sc_drvbpf)) { 1750 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1751 1752 tap->wt_flags = 0; 1753 tap->wt_rate = rate; 1754 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1755 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1756 tap->wt_antenna = sc->tx_ant; 1757 1758 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1759 } 1760 1761 data->m = m0; 1762 data->ni = ni; 1763 1764 flags = 0; 1765 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) 1766 flags |= RT2560_TX_ACK; 1767 1768 /* XXX need to setup descriptor ourself */ 1769 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, 1770 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0, 1771 segs->ds_addr); 1772 1773 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1774 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1775 BUS_DMASYNC_PREWRITE); 1776 1777 DPRINTFN(10, ("sending raw frame len=%u idx=%u rate=%u\n", 1778 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1779 1780 /* kick prio */ 1781 sc->prioq.queued++; 1782 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1783 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1784 1785 return 0; 1786} 1787 1788/* 1789 * Build a RTS control frame. 1790 */ 1791static struct mbuf * 1792rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1793 uint16_t dur) 1794{ 1795 struct ieee80211_frame_rts *rts; 1796 struct mbuf *m; 1797 1798 MGETHDR(m, M_DONTWAIT, MT_DATA); 1799 if (m == NULL) { 1800 sc->sc_ic.ic_stats.is_tx_nobuf++; 1801 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1802 return NULL; 1803 } 1804 1805 rts = mtod(m, struct ieee80211_frame_rts *); 1806 1807 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1808 IEEE80211_FC0_SUBTYPE_RTS; 1809 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1810 *(uint16_t *)rts->i_dur = htole16(dur); 1811 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1812 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1813 1814 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1815 1816 return m; 1817} 1818 1819static int 1820rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1821 struct ieee80211_node *ni) 1822{ 1823 struct ieee80211com *ic = &sc->sc_ic; 1824 struct rt2560_tx_desc *desc; 1825 struct rt2560_tx_data *data; 1826 struct rt2560_node *rn; 1827 struct ieee80211_rateset *rs; 1828 struct ieee80211_frame *wh; 1829 struct ieee80211_key *k; 1830 struct mbuf *mnew; 1831 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1832 uint16_t dur; 1833 uint32_t flags = 0; 1834 int nsegs, rate, error; 1835 1836 wh = mtod(m0, struct ieee80211_frame *); 1837 1838 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1839 rs = &ic->ic_sup_rates[ic->ic_curmode]; 1840 rate = rs->rs_rates[ic->ic_fixed_rate]; 1841 } else { 1842 rs = &ni->ni_rates; 1843 rn = (struct rt2560_node *)ni; 1844 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1845 m0->m_pkthdr.len, NULL, 0); 1846 rate = rs->rs_rates[ni->ni_txrate]; 1847 } 1848 rate &= IEEE80211_RATE_VAL; 1849 1850 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1851 k = ieee80211_crypto_encap(ic, ni, m0); 1852 if (k == NULL) { 1853 m_freem(m0); 1854 return ENOBUFS; 1855 } 1856 1857 /* packet header may have moved, reset our local pointer */ 1858 wh = mtod(m0, struct ieee80211_frame *); 1859 } 1860 1861 /* 1862 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1863 * for directed frames only when the length of the MPDU is greater 1864 * than the length threshold indicated by [...]" ic_rtsthreshold. 1865 */ 1866 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1867 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1868 struct mbuf *m; 1869 uint16_t dur; 1870 int rtsrate, ackrate; 1871 1872 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1873 ackrate = rt2560_ack_rate(ic, rate); 1874 1875 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1876 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1877 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1878 3 * RAL_SIFS; 1879 1880 m = rt2560_get_rts(sc, wh, dur); 1881 1882 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1883 data = &sc->txq.data[sc->txq.cur_encrypt]; 1884 1885 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1886 m, segs, &nsegs, 0); 1887 if (error != 0) { 1888 device_printf(sc->sc_dev, 1889 "could not map mbuf (error %d)\n", error); 1890 m_freem(m); 1891 m_freem(m0); 1892 return error; 1893 } 1894 1895 /* avoid multiple free() of the same node for each fragment */ 1896 ieee80211_ref_node(ni); 1897 1898 data->m = m; 1899 data->ni = ni; 1900 1901 /* RTS frames are not taken into account for rssadapt */ 1902 data->id.id_node = NULL; 1903 1904 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1905 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, 1906 segs->ds_addr); 1907 1908 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1909 BUS_DMASYNC_PREWRITE); 1910 1911 sc->txq.queued++; 1912 sc->txq.cur_encrypt = 1913 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1914 1915 /* 1916 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1917 * asynchronous data frame shall be transmitted after the CTS 1918 * frame and a SIFS period. 1919 */ 1920 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1921 } 1922 1923 data = &sc->txq.data[sc->txq.cur_encrypt]; 1924 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1925 1926 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0, 1927 segs, &nsegs, 0); 1928 if (error != 0 && error != EFBIG) { 1929 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1930 error); 1931 m_freem(m0); 1932 return error; 1933 } 1934 if (error != 0) { 1935 mnew = m_defrag(m0, M_DONTWAIT); 1936 if (mnew == NULL) { 1937 device_printf(sc->sc_dev, 1938 "could not defragment mbuf\n"); 1939 m_freem(m0); 1940 return ENOBUFS; 1941 } 1942 m0 = mnew; 1943 1944 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1945 m0, segs, &nsegs, 0); 1946 if (error != 0) { 1947 device_printf(sc->sc_dev, 1948 "could not map mbuf (error %d)\n", error); 1949 m_freem(m0); 1950 return error; 1951 } 1952 1953 /* packet header may have moved, reset our local pointer */ 1954 wh = mtod(m0, struct ieee80211_frame *); 1955 } 1956 1957 if (bpf_peers_present(sc->sc_drvbpf)) { 1958 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1959 1960 tap->wt_flags = 0; 1961 tap->wt_rate = rate; 1962 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1963 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1964 tap->wt_antenna = sc->tx_ant; 1965 1966 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1967 } 1968 1969 data->m = m0; 1970 data->ni = ni; 1971 1972 /* remember link conditions for rate adaptation algorithm */ 1973 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1974 data->id.id_len = m0->m_pkthdr.len; 1975 data->id.id_rateidx = ni->ni_txrate; 1976 data->id.id_node = ni; 1977 data->id.id_rssi = ni->ni_rssi; 1978 } else 1979 data->id.id_node = NULL; 1980 1981 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1982 flags |= RT2560_TX_ACK; 1983 1984 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1985 ic->ic_flags) + RAL_SIFS; 1986 *(uint16_t *)wh->i_dur = htole16(dur); 1987 } 1988 1989 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, 1990 segs->ds_addr); 1991 1992 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1993 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1994 BUS_DMASYNC_PREWRITE); 1995 1996 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1997 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1998 1999 /* kick encrypt */ 2000 sc->txq.queued++; 2001 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 2002 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 2003 2004 return 0; 2005} 2006 2007static void 2008rt2560_start(struct ifnet *ifp) 2009{ 2010 struct rt2560_softc *sc = ifp->if_softc; 2011 struct ieee80211com *ic = &sc->sc_ic; 2012 struct mbuf *m0; 2013 struct ether_header *eh; 2014 struct ieee80211_node *ni; 2015 2016 RAL_LOCK(sc); 2017 2018 /* prevent management frames from being sent if we're not ready */ 2019 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2020 RAL_UNLOCK(sc); 2021 return; 2022 } 2023 2024 for (;;) { 2025 IF_POLL(&ic->ic_mgtq, m0); 2026 if (m0 != NULL) { 2027 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2028 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2029 break; 2030 } 2031 IF_DEQUEUE(&ic->ic_mgtq, m0); 2032 2033 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 2034 m0->m_pkthdr.rcvif = NULL; 2035 2036 if (bpf_peers_present(ic->ic_rawbpf)) 2037 bpf_mtap(ic->ic_rawbpf, m0); 2038 2039 if (rt2560_tx_mgt(sc, m0, ni) != 0) 2040 break; 2041 2042 } else { 2043 if (ic->ic_state != IEEE80211_S_RUN) 2044 break; 2045 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 2046 if (m0 == NULL) 2047 break; 2048 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 2049 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 2050 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2051 break; 2052 } 2053 2054 if (m0->m_len < sizeof (struct ether_header) && 2055 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 2056 continue; 2057 2058 eh = mtod(m0, struct ether_header *); 2059 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2060 if (ni == NULL) { 2061 m_freem(m0); 2062 continue; 2063 } 2064 BPF_MTAP(ifp, m0); 2065 2066 m0 = ieee80211_encap(ic, m0, ni); 2067 if (m0 == NULL) { 2068 ieee80211_free_node(ni); 2069 continue; 2070 } 2071 2072 if (bpf_peers_present(ic->ic_rawbpf)) 2073 bpf_mtap(ic->ic_rawbpf, m0); 2074 2075 if (rt2560_tx_data(sc, m0, ni) != 0) { 2076 ieee80211_free_node(ni); 2077 ifp->if_oerrors++; 2078 break; 2079 } 2080 } 2081 2082 sc->sc_tx_timer = 5; 2083 ifp->if_timer = 1; 2084 } 2085 2086 RAL_UNLOCK(sc); 2087} 2088 2089static void 2090rt2560_watchdog(struct ifnet *ifp) 2091{ 2092 struct rt2560_softc *sc = ifp->if_softc; 2093 struct ieee80211com *ic = &sc->sc_ic; 2094 2095 RAL_LOCK(sc); 2096 2097 ifp->if_timer = 0; 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 ifp->if_oerrors++; 2104 RAL_UNLOCK(sc); 2105 return; 2106 } 2107 ifp->if_timer = 1; 2108 } 2109 2110 ieee80211_watchdog(ic); 2111 2112 RAL_UNLOCK(sc); 2113} 2114 2115/* 2116 * This function allows for fast channel switching in monitor mode (used by 2117 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2118 * generate a new beacon frame. 2119 */ 2120static int 2121rt2560_reset(struct ifnet *ifp) 2122{ 2123 struct rt2560_softc *sc = ifp->if_softc; 2124 struct ieee80211com *ic = &sc->sc_ic; 2125 2126 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2127 return ENETRESET; 2128 2129 rt2560_set_chan(sc, ic->ic_curchan); 2130 2131 return 0; 2132} 2133 2134static int 2135rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2136{ 2137 struct rt2560_softc *sc = ifp->if_softc; 2138 struct ieee80211com *ic = &sc->sc_ic; 2139 int error = 0; 2140 2141 RAL_LOCK(sc); 2142 2143 switch (cmd) { 2144 case SIOCSIFFLAGS: 2145 if (ifp->if_flags & IFF_UP) { 2146 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2147 rt2560_update_promisc(sc); 2148 else 2149 rt2560_init(sc); 2150 } else { 2151 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2152 rt2560_stop(sc); 2153 } 2154 break; 2155 2156 default: 2157 error = ieee80211_ioctl(ic, cmd, data); 2158 } 2159 2160 if (error == ENETRESET) { 2161 if ((ifp->if_flags & IFF_UP) && 2162 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 2163 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2164 rt2560_init(sc); 2165 error = 0; 2166 } 2167 2168 RAL_UNLOCK(sc); 2169 2170 return error; 2171} 2172 2173static void 2174rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2175{ 2176 uint32_t tmp; 2177 int ntries; 2178 2179 for (ntries = 0; ntries < 100; ntries++) { 2180 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2181 break; 2182 DELAY(1); 2183 } 2184 if (ntries == 100) { 2185 device_printf(sc->sc_dev, "could not write to BBP\n"); 2186 return; 2187 } 2188 2189 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2190 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2191 2192 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2193} 2194 2195static uint8_t 2196rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2197{ 2198 uint32_t val; 2199 int ntries; 2200 2201 val = RT2560_BBP_BUSY | reg << 8; 2202 RAL_WRITE(sc, RT2560_BBPCSR, val); 2203 2204 for (ntries = 0; ntries < 100; ntries++) { 2205 val = RAL_READ(sc, RT2560_BBPCSR); 2206 if (!(val & RT2560_BBP_BUSY)) 2207 return val & 0xff; 2208 DELAY(1); 2209 } 2210 2211 device_printf(sc->sc_dev, "could not read from BBP\n"); 2212 return 0; 2213} 2214 2215static void 2216rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2217{ 2218 uint32_t tmp; 2219 int ntries; 2220 2221 for (ntries = 0; ntries < 100; ntries++) { 2222 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2223 break; 2224 DELAY(1); 2225 } 2226 if (ntries == 100) { 2227 device_printf(sc->sc_dev, "could not write to RF\n"); 2228 return; 2229 } 2230 2231 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2232 (reg & 0x3); 2233 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2234 2235 /* remember last written value in sc */ 2236 sc->rf_regs[reg] = val; 2237 2238 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2239} 2240 2241static void 2242rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2243{ 2244 struct ieee80211com *ic = &sc->sc_ic; 2245 uint8_t power, tmp; 2246 u_int i, chan; 2247 2248 chan = ieee80211_chan2ieee(ic, c); 2249 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2250 return; 2251 2252 if (IEEE80211_IS_CHAN_2GHZ(c)) 2253 power = min(sc->txpow[chan - 1], 31); 2254 else 2255 power = 31; 2256 2257 /* adjust txpower using ifconfig settings */ 2258 power -= (100 - ic->ic_txpowlimit) / 8; 2259 2260 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2261 2262 switch (sc->rf_rev) { 2263 case RT2560_RF_2522: 2264 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2265 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2266 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2267 break; 2268 2269 case RT2560_RF_2523: 2270 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2271 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2272 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2273 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2274 break; 2275 2276 case RT2560_RF_2524: 2277 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2278 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2279 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2280 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2281 break; 2282 2283 case RT2560_RF_2525: 2284 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2285 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2286 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2287 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2288 2289 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2290 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2291 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2292 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2293 break; 2294 2295 case RT2560_RF_2525E: 2296 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2297 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2298 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2299 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2300 break; 2301 2302 case RT2560_RF_2526: 2303 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2304 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2305 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2306 2307 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2308 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2309 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2310 break; 2311 2312 /* dual-band RF */ 2313 case RT2560_RF_5222: 2314 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2315 2316 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2317 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2318 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2319 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2320 break; 2321 } 2322 2323 if (ic->ic_state != IEEE80211_S_SCAN) { 2324 /* set Japan filter bit for channel 14 */ 2325 tmp = rt2560_bbp_read(sc, 70); 2326 2327 tmp &= ~RT2560_JAPAN_FILTER; 2328 if (chan == 14) 2329 tmp |= RT2560_JAPAN_FILTER; 2330 2331 rt2560_bbp_write(sc, 70, tmp); 2332 2333 /* clear CRC errors */ 2334 RAL_READ(sc, RT2560_CNT0); 2335 } 2336} 2337 2338#if 0 2339/* 2340 * Disable RF auto-tuning. 2341 */ 2342static void 2343rt2560_disable_rf_tune(struct rt2560_softc *sc) 2344{ 2345 uint32_t tmp; 2346 2347 if (sc->rf_rev != RT2560_RF_2523) { 2348 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2349 rt2560_rf_write(sc, RAL_RF1, tmp); 2350 } 2351 2352 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2353 rt2560_rf_write(sc, RAL_RF3, tmp); 2354 2355 DPRINTFN(2, ("disabling RF autotune\n")); 2356} 2357#endif 2358 2359/* 2360 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2361 * synchronization. 2362 */ 2363static void 2364rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2365{ 2366 struct ieee80211com *ic = &sc->sc_ic; 2367 uint16_t logcwmin, preload; 2368 uint32_t tmp; 2369 2370 /* first, disable TSF synchronization */ 2371 RAL_WRITE(sc, RT2560_CSR14, 0); 2372 2373 tmp = 16 * ic->ic_bss->ni_intval; 2374 RAL_WRITE(sc, RT2560_CSR12, tmp); 2375 2376 RAL_WRITE(sc, RT2560_CSR13, 0); 2377 2378 logcwmin = 5; 2379 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2380 tmp = logcwmin << 16 | preload; 2381 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2382 2383 /* finally, enable TSF synchronization */ 2384 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2385 if (ic->ic_opmode == IEEE80211_M_STA) 2386 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2387 else 2388 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2389 RT2560_ENABLE_BEACON_GENERATOR; 2390 RAL_WRITE(sc, RT2560_CSR14, tmp); 2391 2392 DPRINTF(("enabling TSF synchronization\n")); 2393} 2394 2395static void 2396rt2560_update_plcp(struct rt2560_softc *sc) 2397{ 2398 struct ieee80211com *ic = &sc->sc_ic; 2399 2400 /* no short preamble for 1Mbps */ 2401 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2402 2403 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2404 /* values taken from the reference driver */ 2405 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2406 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2407 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2408 } else { 2409 /* same values as above or'ed 0x8 */ 2410 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2411 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2412 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2413 } 2414 2415 DPRINTF(("updating PLCP for %s preamble\n", 2416 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2417} 2418 2419/* 2420 * This function can be called by ieee80211_set_shortslottime(). Refer to 2421 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2422 */ 2423static void 2424rt2560_update_slot(struct ifnet *ifp) 2425{ 2426 struct rt2560_softc *sc = ifp->if_softc; 2427 struct ieee80211com *ic = &sc->sc_ic; 2428 uint8_t slottime; 2429 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2430 uint32_t tmp; 2431 2432 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2433 2434 /* update the MAC slot boundaries */ 2435 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2436 tx_pifs = tx_sifs + slottime; 2437 tx_difs = tx_sifs + 2 * slottime; 2438 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2439 2440 tmp = RAL_READ(sc, RT2560_CSR11); 2441 tmp = (tmp & ~0x1f00) | slottime << 8; 2442 RAL_WRITE(sc, RT2560_CSR11, tmp); 2443 2444 tmp = tx_pifs << 16 | tx_sifs; 2445 RAL_WRITE(sc, RT2560_CSR18, tmp); 2446 2447 tmp = eifs << 16 | tx_difs; 2448 RAL_WRITE(sc, RT2560_CSR19, tmp); 2449 2450 DPRINTF(("setting slottime to %uus\n", slottime)); 2451} 2452 2453static void 2454rt2560_set_basicrates(struct rt2560_softc *sc) 2455{ 2456 struct ieee80211com *ic = &sc->sc_ic; 2457 2458 /* update basic rate set */ 2459 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2460 /* 11b basic rates: 1, 2Mbps */ 2461 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2462 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2463 /* 11a basic rates: 6, 12, 24Mbps */ 2464 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2465 } else { 2466 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2467 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2468 } 2469} 2470 2471static void 2472rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2473{ 2474 uint32_t tmp; 2475 2476 /* set ON period to 70ms and OFF period to 30ms */ 2477 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2478 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2479} 2480 2481static void 2482rt2560_set_bssid(struct rt2560_softc *sc, uint8_t *bssid) 2483{ 2484 uint32_t tmp; 2485 2486 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2487 RAL_WRITE(sc, RT2560_CSR5, tmp); 2488 2489 tmp = bssid[4] | bssid[5] << 8; 2490 RAL_WRITE(sc, RT2560_CSR6, tmp); 2491 2492 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2493} 2494 2495static void 2496rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2497{ 2498 uint32_t tmp; 2499 2500 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2501 RAL_WRITE(sc, RT2560_CSR3, tmp); 2502 2503 tmp = addr[4] | addr[5] << 8; 2504 RAL_WRITE(sc, RT2560_CSR4, tmp); 2505 2506 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2507} 2508 2509static void 2510rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2511{ 2512 uint32_t tmp; 2513 2514 tmp = RAL_READ(sc, RT2560_CSR3); 2515 addr[0] = tmp & 0xff; 2516 addr[1] = (tmp >> 8) & 0xff; 2517 addr[2] = (tmp >> 16) & 0xff; 2518 addr[3] = (tmp >> 24); 2519 2520 tmp = RAL_READ(sc, RT2560_CSR4); 2521 addr[4] = tmp & 0xff; 2522 addr[5] = (tmp >> 8) & 0xff; 2523} 2524 2525static void 2526rt2560_update_promisc(struct rt2560_softc *sc) 2527{ 2528 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2529 uint32_t tmp; 2530 2531 tmp = RAL_READ(sc, RT2560_RXCSR0); 2532 2533 tmp &= ~RT2560_DROP_NOT_TO_ME; 2534 if (!(ifp->if_flags & IFF_PROMISC)) 2535 tmp |= RT2560_DROP_NOT_TO_ME; 2536 2537 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2538 2539 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2540 "entering" : "leaving")); 2541} 2542 2543static const char * 2544rt2560_get_rf(int rev) 2545{ 2546 switch (rev) { 2547 case RT2560_RF_2522: return "RT2522"; 2548 case RT2560_RF_2523: return "RT2523"; 2549 case RT2560_RF_2524: return "RT2524"; 2550 case RT2560_RF_2525: return "RT2525"; 2551 case RT2560_RF_2525E: return "RT2525e"; 2552 case RT2560_RF_2526: return "RT2526"; 2553 case RT2560_RF_5222: return "RT5222"; 2554 default: return "unknown"; 2555 } 2556} 2557 2558static void 2559rt2560_read_eeprom(struct rt2560_softc *sc) 2560{ 2561 uint16_t val; 2562 int i; 2563 2564 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2565 sc->rf_rev = (val >> 11) & 0x7; 2566 sc->hw_radio = (val >> 10) & 0x1; 2567 sc->led_mode = (val >> 6) & 0x7; 2568 sc->rx_ant = (val >> 4) & 0x3; 2569 sc->tx_ant = (val >> 2) & 0x3; 2570 sc->nb_ant = val & 0x3; 2571 2572 /* read default values for BBP registers */ 2573 for (i = 0; i < 16; i++) { 2574 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2575 sc->bbp_prom[i].reg = val >> 8; 2576 sc->bbp_prom[i].val = val & 0xff; 2577 } 2578 2579 /* read Tx power for all b/g channels */ 2580 for (i = 0; i < 14 / 2; i++) { 2581 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2582 sc->txpow[i * 2] = val >> 8; 2583 sc->txpow[i * 2 + 1] = val & 0xff; 2584 } 2585} 2586 2587static int 2588rt2560_bbp_init(struct rt2560_softc *sc) 2589{ 2590#define N(a) (sizeof (a) / sizeof ((a)[0])) 2591 int i, ntries; 2592 2593 /* wait for BBP to be ready */ 2594 for (ntries = 0; ntries < 100; ntries++) { 2595 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2596 break; 2597 DELAY(1); 2598 } 2599 if (ntries == 100) { 2600 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2601 return EIO; 2602 } 2603 2604 /* initialize BBP registers to default values */ 2605 for (i = 0; i < N(rt2560_def_bbp); i++) { 2606 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2607 rt2560_def_bbp[i].val); 2608 } 2609#if 0 2610 /* initialize BBP registers to values stored in EEPROM */ 2611 for (i = 0; i < 16; i++) { 2612 if (sc->bbp_prom[i].reg == 0xff) 2613 continue; 2614 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2615 } 2616#endif 2617 2618 return 0; 2619#undef N 2620} 2621 2622static void 2623rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2624{ 2625 uint32_t tmp; 2626 uint8_t tx; 2627 2628 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2629 if (antenna == 1) 2630 tx |= RT2560_BBP_ANTA; 2631 else if (antenna == 2) 2632 tx |= RT2560_BBP_ANTB; 2633 else 2634 tx |= RT2560_BBP_DIVERSITY; 2635 2636 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2637 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2638 sc->rf_rev == RT2560_RF_5222) 2639 tx |= RT2560_BBP_FLIPIQ; 2640 2641 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2642 2643 /* update values for CCK and OFDM in BBPCSR1 */ 2644 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2645 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2646 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2647} 2648 2649static void 2650rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2651{ 2652 uint8_t rx; 2653 2654 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2655 if (antenna == 1) 2656 rx |= RT2560_BBP_ANTA; 2657 else if (antenna == 2) 2658 rx |= RT2560_BBP_ANTB; 2659 else 2660 rx |= RT2560_BBP_DIVERSITY; 2661 2662 /* need to force no I/Q flip for RF 2525e and 2526 */ 2663 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2664 rx &= ~RT2560_BBP_FLIPIQ; 2665 2666 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2667} 2668 2669static void 2670rt2560_init(void *priv) 2671{ 2672#define N(a) (sizeof (a) / sizeof ((a)[0])) 2673 struct rt2560_softc *sc = priv; 2674 struct ieee80211com *ic = &sc->sc_ic; 2675 struct ifnet *ifp = ic->ic_ifp; 2676 uint32_t tmp; 2677 int i; 2678 2679 RAL_LOCK(sc); 2680 2681 rt2560_stop(sc); 2682 2683 /* setup tx rings */ 2684 tmp = RT2560_PRIO_RING_COUNT << 24 | 2685 RT2560_ATIM_RING_COUNT << 16 | 2686 RT2560_TX_RING_COUNT << 8 | 2687 RT2560_TX_DESC_SIZE; 2688 2689 /* rings must be initialized in this exact order */ 2690 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2691 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2692 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2693 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2694 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2695 2696 /* setup rx ring */ 2697 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2698 2699 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2700 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2701 2702 /* initialize MAC registers to default values */ 2703 for (i = 0; i < N(rt2560_def_mac); i++) 2704 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2705 2706 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2707 rt2560_set_macaddr(sc, ic->ic_myaddr); 2708 2709 /* set basic rate set (will be updated later) */ 2710 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2711 2712 rt2560_set_txantenna(sc, sc->tx_ant); 2713 rt2560_set_rxantenna(sc, sc->rx_ant); 2714 rt2560_update_slot(ifp); 2715 rt2560_update_plcp(sc); 2716 rt2560_update_led(sc, 0, 0); 2717 2718 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2719 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2720 2721 if (rt2560_bbp_init(sc) != 0) { 2722 rt2560_stop(sc); 2723 RAL_UNLOCK(sc); 2724 return; 2725 } 2726 2727 /* set default BSS channel */ 2728 rt2560_set_chan(sc, ic->ic_curchan); 2729 2730 /* kick Rx */ 2731 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2732 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2733 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2734 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2735 tmp |= RT2560_DROP_TODS; 2736 if (!(ifp->if_flags & IFF_PROMISC)) 2737 tmp |= RT2560_DROP_NOT_TO_ME; 2738 } 2739 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2740 2741 /* clear old FCS and Rx FIFO errors */ 2742 RAL_READ(sc, RT2560_CNT0); 2743 RAL_READ(sc, RT2560_CNT4); 2744 2745 /* clear any pending interrupts */ 2746 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2747 2748 /* enable interrupts */ 2749 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2750 2751 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2752 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2753 2754 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2755 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2756 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2757 } else 2758 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2759 2760 RAL_UNLOCK(sc); 2761#undef N 2762} 2763 2764void 2765rt2560_stop(void *priv) 2766{ 2767 struct rt2560_softc *sc = priv; 2768 struct ieee80211com *ic = &sc->sc_ic; 2769 struct ifnet *ifp = ic->ic_ifp; 2770 2771 sc->sc_tx_timer = 0; 2772 ifp->if_timer = 0; 2773 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2774 2775 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2776 2777 /* abort Tx */ 2778 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2779 2780 /* disable Rx */ 2781 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2782 2783 /* reset ASIC (imply reset BBP) */ 2784 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2785 RAL_WRITE(sc, RT2560_CSR1, 0); 2786 2787 /* disable interrupts */ 2788 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2789 2790 /* reset Tx and Rx rings */ 2791 rt2560_reset_tx_ring(sc, &sc->txq); 2792 rt2560_reset_tx_ring(sc, &sc->atimq); 2793 rt2560_reset_tx_ring(sc, &sc->prioq); 2794 rt2560_reset_tx_ring(sc, &sc->bcnq); 2795 rt2560_reset_rx_ring(sc, &sc->rxq); 2796} 2797 2798static int 2799rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2800 const struct ieee80211_bpf_params *params) 2801{ 2802 struct ieee80211com *ic = ni->ni_ic; 2803 struct ifnet *ifp = ic->ic_ifp; 2804 struct rt2560_softc *sc = ifp->if_softc; 2805 2806 RAL_LOCK(sc); 2807 2808 /* prevent management frames from being sent if we're not ready */ 2809 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2810 RAL_UNLOCK(sc); 2811 return ENETDOWN; 2812 } 2813 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2814 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2815 RAL_UNLOCK(sc); 2816 return ENOBUFS; /* XXX */ 2817 } 2818 2819 if (bpf_peers_present(ic->ic_rawbpf)) 2820 bpf_mtap(ic->ic_rawbpf, m); 2821 2822 ifp->if_opackets++; 2823 2824 if (params == NULL) { 2825 /* 2826 * Legacy path; interpret frame contents to decide 2827 * precisely how to send the frame. 2828 */ 2829 if (rt2560_tx_mgt(sc, m, ni) != 0) 2830 goto bad; 2831 } else { 2832 /* 2833 * Caller supplied explicit parameters to use in 2834 * sending the frame. 2835 */ 2836 if (rt2560_tx_raw(sc, m, ni, params)) 2837 goto bad; 2838 } 2839 sc->sc_tx_timer = 5; 2840 ifp->if_timer = 1; 2841 2842 RAL_UNLOCK(sc); 2843 2844 return 0; 2845bad: 2846 ifp->if_oerrors++; 2847 ieee80211_free_node(ni); 2848 RAL_UNLOCK(sc); 2849 return EIO; /* XXX */ 2850} 2851