rt2560.c revision 160691
1/* $FreeBSD: head/sys/dev/ral/rt2560.c 160691 2006-07-26 03:30:50Z sam $ */ 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 160691 2006-07-26 03:30:50Z sam $"); 22 23/*- 24 * Ralink Technology RT2560 chipset driver 25 * http://www.ralinktech.com/ 26 */ 27 28#include <sys/param.h> 29#include <sys/sysctl.h> 30#include <sys/sockio.h> 31#include <sys/mbuf.h> 32#include <sys/kernel.h> 33#include <sys/socket.h> 34#include <sys/systm.h> 35#include <sys/malloc.h> 36#include <sys/module.h> 37#include <sys/bus.h> 38#include <sys/endian.h> 39 40#include <machine/bus.h> 41#include <machine/resource.h> 42#include <sys/rman.h> 43 44#include <net/bpf.h> 45#include <net/if.h> 46#include <net/if_arp.h> 47#include <net/ethernet.h> 48#include <net/if_dl.h> 49#include <net/if_media.h> 50#include <net/if_types.h> 51 52#include <net80211/ieee80211_var.h> 53#include <net80211/ieee80211_radiotap.h> 54 55#include <netinet/in.h> 56#include <netinet/in_systm.h> 57#include <netinet/in_var.h> 58#include <netinet/ip.h> 59#include <netinet/if_ether.h> 60 61#include <dev/ral/if_ralrate.h> 62#include <dev/ral/rt2560reg.h> 63#include <dev/ral/rt2560var.h> 64 65#ifdef RAL_DEBUG 66#define DPRINTF(x) do { if (ral_debug > 0) printf x; } while (0) 67#define DPRINTFN(n, x) do { if (ral_debug >= (n)) printf x; } while (0) 68extern int ral_debug; 69#else 70#define DPRINTF(x) 71#define DPRINTFN(n, x) 72#endif 73 74static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int, 75 int); 76static int rt2560_alloc_tx_ring(struct rt2560_softc *, 77 struct rt2560_tx_ring *, int); 78static void rt2560_reset_tx_ring(struct rt2560_softc *, 79 struct rt2560_tx_ring *); 80static void rt2560_free_tx_ring(struct rt2560_softc *, 81 struct rt2560_tx_ring *); 82static int rt2560_alloc_rx_ring(struct rt2560_softc *, 83 struct rt2560_rx_ring *, int); 84static void rt2560_reset_rx_ring(struct rt2560_softc *, 85 struct rt2560_rx_ring *); 86static void rt2560_free_rx_ring(struct rt2560_softc *, 87 struct rt2560_rx_ring *); 88static struct ieee80211_node *rt2560_node_alloc( 89 struct ieee80211_node_table *); 90static int rt2560_media_change(struct ifnet *); 91static void rt2560_next_scan(void *); 92static void rt2560_iter_func(void *, struct ieee80211_node *); 93static void rt2560_update_rssadapt(void *); 94static int rt2560_newstate(struct ieee80211com *, 95 enum ieee80211_state, int); 96static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t); 97static void rt2560_encryption_intr(struct rt2560_softc *); 98static void rt2560_tx_intr(struct rt2560_softc *); 99static void rt2560_prio_intr(struct rt2560_softc *); 100static void rt2560_decryption_intr(struct rt2560_softc *); 101static void rt2560_rx_intr(struct rt2560_softc *); 102static void rt2560_beacon_expire(struct rt2560_softc *); 103static void rt2560_wakeup_expire(struct rt2560_softc *); 104static uint8_t rt2560_rxrate(struct rt2560_rx_desc *); 105static int rt2560_ack_rate(struct ieee80211com *, int); 106static uint16_t rt2560_txtime(int, int, uint32_t); 107static uint8_t rt2560_plcp_signal(int); 108static void rt2560_setup_tx_desc(struct rt2560_softc *, 109 struct rt2560_tx_desc *, uint32_t, int, int, int, 110 bus_addr_t); 111static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *, 112 struct ieee80211_node *); 113static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *, 114 struct ieee80211_node *); 115static struct mbuf *rt2560_get_rts(struct rt2560_softc *, 116 struct ieee80211_frame *, uint16_t); 117static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *, 118 struct ieee80211_node *); 119static void rt2560_start(struct ifnet *); 120static void rt2560_watchdog(struct ifnet *); 121static int rt2560_reset(struct ifnet *); 122static int rt2560_ioctl(struct ifnet *, u_long, caddr_t); 123static void rt2560_bbp_write(struct rt2560_softc *, uint8_t, 124 uint8_t); 125static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t); 126static void rt2560_rf_write(struct rt2560_softc *, uint8_t, 127 uint32_t); 128static void rt2560_set_chan(struct rt2560_softc *, 129 struct ieee80211_channel *); 130#if 0 131static void rt2560_disable_rf_tune(struct rt2560_softc *); 132#endif 133static void rt2560_enable_tsf_sync(struct rt2560_softc *); 134static void rt2560_update_plcp(struct rt2560_softc *); 135static void rt2560_update_slot(struct ifnet *); 136static void rt2560_set_basicrates(struct rt2560_softc *); 137static void rt2560_update_led(struct rt2560_softc *, int, int); 138static void rt2560_set_bssid(struct rt2560_softc *, uint8_t *); 139static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *); 140static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *); 141static void rt2560_update_promisc(struct rt2560_softc *); 142static const char *rt2560_get_rf(int); 143static void rt2560_read_eeprom(struct rt2560_softc *); 144static int rt2560_bbp_init(struct rt2560_softc *); 145static void rt2560_set_txantenna(struct rt2560_softc *, int); 146static void rt2560_set_rxantenna(struct rt2560_softc *, int); 147static void rt2560_init(void *); 148static void rt2560_stop(void *); 149static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *, 150 const struct ieee80211_bpf_params *); 151 152/* 153 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 154 */ 155static const struct ieee80211_rateset rt2560_rateset_11a = 156 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 157 158static const struct ieee80211_rateset rt2560_rateset_11b = 159 { 4, { 2, 4, 11, 22 } }; 160 161static const struct ieee80211_rateset rt2560_rateset_11g = 162 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 163 164static const struct { 165 uint32_t reg; 166 uint32_t val; 167} rt2560_def_mac[] = { 168 RT2560_DEF_MAC 169}; 170 171static const struct { 172 uint8_t reg; 173 uint8_t val; 174} rt2560_def_bbp[] = { 175 RT2560_DEF_BBP 176}; 177 178static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2; 179static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2; 180static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2; 181static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2; 182static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2; 183static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2; 184static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2; 185static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2; 186 187static const struct { 188 uint8_t chan; 189 uint32_t r1, r2, r4; 190} rt2560_rf5222[] = { 191 RT2560_RF5222 192}; 193 194int 195rt2560_attach(device_t dev, int id) 196{ 197 struct rt2560_softc *sc = device_get_softc(dev); 198 struct ieee80211com *ic = &sc->sc_ic; 199 struct ifnet *ifp; 200 int error, i; 201 202 sc->sc_dev = dev; 203 204 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK, 205 MTX_DEF | MTX_RECURSE); 206 207 callout_init(&sc->scan_ch, debug_mpsafenet ? CALLOUT_MPSAFE : 0); 208 callout_init(&sc->rssadapt_ch, CALLOUT_MPSAFE); 209 210 /* retrieve RT2560 rev. no */ 211 sc->asic_rev = RAL_READ(sc, RT2560_CSR0); 212 213 /* retrieve MAC address */ 214 rt2560_get_macaddr(sc, ic->ic_myaddr); 215 216 /* retrieve RF rev. no and various other things from EEPROM */ 217 rt2560_read_eeprom(sc); 218 219 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n", 220 sc->asic_rev, rt2560_get_rf(sc->rf_rev)); 221 222 /* 223 * Allocate Tx and Rx rings. 224 */ 225 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT); 226 if (error != 0) { 227 device_printf(sc->sc_dev, "could not allocate Tx ring\n"); 228 goto fail1; 229 } 230 231 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT); 232 if (error != 0) { 233 device_printf(sc->sc_dev, "could not allocate ATIM ring\n"); 234 goto fail2; 235 } 236 237 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT); 238 if (error != 0) { 239 device_printf(sc->sc_dev, "could not allocate Prio ring\n"); 240 goto fail3; 241 } 242 243 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT); 244 if (error != 0) { 245 device_printf(sc->sc_dev, "could not allocate Beacon ring\n"); 246 goto fail4; 247 } 248 249 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT); 250 if (error != 0) { 251 device_printf(sc->sc_dev, "could not allocate Rx ring\n"); 252 goto fail5; 253 } 254 255 ifp = sc->sc_ifp = if_alloc(IFT_ETHER); 256 if (ifp == NULL) { 257 device_printf(sc->sc_dev, "can not if_alloc()\n"); 258 goto fail6; 259 } 260 261 ifp->if_softc = sc; 262 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 263 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 264 ifp->if_init = rt2560_init; 265 ifp->if_ioctl = rt2560_ioctl; 266 ifp->if_start = rt2560_start; 267 ifp->if_watchdog = rt2560_watchdog; 268 IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); 269 ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN; 270 IFQ_SET_READY(&ifp->if_snd); 271 272 ic->ic_ifp = ifp; 273 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 274 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 275 ic->ic_state = IEEE80211_S_INIT; 276 277 /* set device capabilities */ 278 ic->ic_caps = 279 IEEE80211_C_IBSS | /* IBSS mode supported */ 280 IEEE80211_C_MONITOR | /* monitor mode supported */ 281 IEEE80211_C_HOSTAP | /* HostAp mode supported */ 282 IEEE80211_C_TXPMGT | /* tx power management */ 283 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 284 IEEE80211_C_SHSLOT | /* short slot time supported */ 285 IEEE80211_C_WPA; /* 802.11i */ 286 287 if (sc->rf_rev == RT2560_RF_5222) { 288 /* set supported .11a rates */ 289 ic->ic_sup_rates[IEEE80211_MODE_11A] = rt2560_rateset_11a; 290 291 /* set supported .11a channels */ 292 for (i = 36; i <= 64; i += 4) { 293 ic->ic_channels[i].ic_freq = 294 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 295 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 296 } 297 for (i = 100; i <= 140; i += 4) { 298 ic->ic_channels[i].ic_freq = 299 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 300 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 301 } 302 for (i = 149; i <= 161; i += 4) { 303 ic->ic_channels[i].ic_freq = 304 ieee80211_ieee2mhz(i, IEEE80211_CHAN_5GHZ); 305 ic->ic_channels[i].ic_flags = IEEE80211_CHAN_A; 306 } 307 } 308 309 /* set supported .11b and .11g rates */ 310 ic->ic_sup_rates[IEEE80211_MODE_11B] = rt2560_rateset_11b; 311 ic->ic_sup_rates[IEEE80211_MODE_11G] = rt2560_rateset_11g; 312 313 /* set supported .11b and .11g channels (1 through 14) */ 314 for (i = 1; i <= 14; i++) { 315 ic->ic_channels[i].ic_freq = 316 ieee80211_ieee2mhz(i, IEEE80211_CHAN_2GHZ); 317 ic->ic_channels[i].ic_flags = 318 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 319 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 320 } 321 322 ieee80211_ifattach(ic); 323 ic->ic_node_alloc = rt2560_node_alloc; 324 ic->ic_updateslot = rt2560_update_slot; 325 ic->ic_reset = rt2560_reset; 326 /* enable s/w bmiss handling in sta mode */ 327 ic->ic_flags_ext |= IEEE80211_FEXT_SWBMISS; 328 329 /* override state transition machine */ 330 sc->sc_newstate = ic->ic_newstate; 331 ic->ic_newstate = rt2560_newstate; 332 ic->ic_raw_xmit = rt2560_raw_xmit; 333 ieee80211_media_init(ic, rt2560_media_change, ieee80211_media_status); 334 335 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 336 sizeof (struct ieee80211_frame) + 64, &sc->sc_drvbpf); 337 338 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 339 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 340 sc->sc_rxtap.wr_ihdr.it_present = htole32(RT2560_RX_RADIOTAP_PRESENT); 341 342 sc->sc_txtap_len = sizeof sc->sc_txtapu; 343 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 344 sc->sc_txtap.wt_ihdr.it_present = htole32(RT2560_TX_RADIOTAP_PRESENT); 345 346 /* 347 * Add a few sysctl knobs. 348 */ 349 sc->dwelltime = 200; 350 351 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 352 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 353 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)"); 354 355 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 356 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, 357 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)"); 358 359 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev), 360 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "dwell", 361 CTLFLAG_RW, &sc->dwelltime, 0, 362 "channel dwell time (ms) for AP/station scanning"); 363 364 if (bootverbose) 365 ieee80211_announce(ic); 366 367 return 0; 368 369fail6: rt2560_free_rx_ring(sc, &sc->rxq); 370fail5: rt2560_free_tx_ring(sc, &sc->bcnq); 371fail4: rt2560_free_tx_ring(sc, &sc->prioq); 372fail3: rt2560_free_tx_ring(sc, &sc->atimq); 373fail2: rt2560_free_tx_ring(sc, &sc->txq); 374fail1: mtx_destroy(&sc->sc_mtx); 375 376 return ENXIO; 377} 378 379int 380rt2560_detach(void *xsc) 381{ 382 struct rt2560_softc *sc = xsc; 383 struct ieee80211com *ic = &sc->sc_ic; 384 struct ifnet *ifp = ic->ic_ifp; 385 386 rt2560_stop(sc); 387 callout_stop(&sc->scan_ch); 388 callout_stop(&sc->rssadapt_ch); 389 390 bpfdetach(ifp); 391 ieee80211_ifdetach(ic); 392 393 rt2560_free_tx_ring(sc, &sc->txq); 394 rt2560_free_tx_ring(sc, &sc->atimq); 395 rt2560_free_tx_ring(sc, &sc->prioq); 396 rt2560_free_tx_ring(sc, &sc->bcnq); 397 rt2560_free_rx_ring(sc, &sc->rxq); 398 399 if_free(ifp); 400 401 mtx_destroy(&sc->sc_mtx); 402 403 return 0; 404} 405 406void 407rt2560_shutdown(void *xsc) 408{ 409 struct rt2560_softc *sc = xsc; 410 411 rt2560_stop(sc); 412} 413 414void 415rt2560_suspend(void *xsc) 416{ 417 struct rt2560_softc *sc = xsc; 418 419 rt2560_stop(sc); 420} 421 422void 423rt2560_resume(void *xsc) 424{ 425 struct rt2560_softc *sc = xsc; 426 struct ifnet *ifp = sc->sc_ic.ic_ifp; 427 428 if (ifp->if_flags & IFF_UP) { 429 ifp->if_init(ifp->if_softc); 430 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 431 ifp->if_start(ifp); 432 } 433} 434 435static void 436rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error) 437{ 438 if (error != 0) 439 return; 440 441 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg)); 442 443 *(bus_addr_t *)arg = segs[0].ds_addr; 444} 445 446static int 447rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring, 448 int count) 449{ 450 int i, error; 451 452 ring->count = count; 453 ring->queued = 0; 454 ring->cur = ring->next = 0; 455 ring->cur_encrypt = ring->next_encrypt = 0; 456 457 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 458 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_TX_DESC_SIZE, 1, 459 count * RT2560_TX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 460 if (error != 0) { 461 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 462 goto fail; 463 } 464 465 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 466 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 467 if (error != 0) { 468 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 469 goto fail; 470 } 471 472 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 473 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 474 0); 475 if (error != 0) { 476 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 477 goto fail; 478 } 479 480 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF, 481 M_NOWAIT | M_ZERO); 482 if (ring->data == NULL) { 483 device_printf(sc->sc_dev, "could not allocate soft data\n"); 484 error = ENOMEM; 485 goto fail; 486 } 487 488 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 489 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, RT2560_MAX_SCATTER, 490 MCLBYTES, 0, NULL, NULL, &ring->data_dmat); 491 if (error != 0) { 492 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 493 goto fail; 494 } 495 496 for (i = 0; i < count; i++) { 497 error = bus_dmamap_create(ring->data_dmat, 0, 498 &ring->data[i].map); 499 if (error != 0) { 500 device_printf(sc->sc_dev, "could not create DMA map\n"); 501 goto fail; 502 } 503 } 504 505 return 0; 506 507fail: rt2560_free_tx_ring(sc, ring); 508 return error; 509} 510 511static void 512rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 513{ 514 struct rt2560_tx_desc *desc; 515 struct rt2560_tx_data *data; 516 int i; 517 518 for (i = 0; i < ring->count; i++) { 519 desc = &ring->desc[i]; 520 data = &ring->data[i]; 521 522 if (data->m != NULL) { 523 bus_dmamap_sync(ring->data_dmat, data->map, 524 BUS_DMASYNC_POSTWRITE); 525 bus_dmamap_unload(ring->data_dmat, data->map); 526 m_freem(data->m); 527 data->m = NULL; 528 } 529 530 if (data->ni != NULL) { 531 ieee80211_free_node(data->ni); 532 data->ni = NULL; 533 } 534 535 desc->flags = 0; 536 } 537 538 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 539 540 ring->queued = 0; 541 ring->cur = ring->next = 0; 542 ring->cur_encrypt = ring->next_encrypt = 0; 543} 544 545static void 546rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring) 547{ 548 struct rt2560_tx_data *data; 549 int i; 550 551 if (ring->desc != NULL) { 552 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 553 BUS_DMASYNC_POSTWRITE); 554 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 555 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 556 } 557 558 if (ring->desc_dmat != NULL) 559 bus_dma_tag_destroy(ring->desc_dmat); 560 561 if (ring->data != NULL) { 562 for (i = 0; i < ring->count; i++) { 563 data = &ring->data[i]; 564 565 if (data->m != NULL) { 566 bus_dmamap_sync(ring->data_dmat, data->map, 567 BUS_DMASYNC_POSTWRITE); 568 bus_dmamap_unload(ring->data_dmat, data->map); 569 m_freem(data->m); 570 } 571 572 if (data->ni != NULL) 573 ieee80211_free_node(data->ni); 574 575 if (data->map != NULL) 576 bus_dmamap_destroy(ring->data_dmat, data->map); 577 } 578 579 free(ring->data, M_DEVBUF); 580 } 581 582 if (ring->data_dmat != NULL) 583 bus_dma_tag_destroy(ring->data_dmat); 584} 585 586static int 587rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring, 588 int count) 589{ 590 struct rt2560_rx_desc *desc; 591 struct rt2560_rx_data *data; 592 bus_addr_t physaddr; 593 int i, error; 594 595 ring->count = count; 596 ring->cur = ring->next = 0; 597 ring->cur_decrypt = 0; 598 599 error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT, 600 BUS_SPACE_MAXADDR, NULL, NULL, count * RT2560_RX_DESC_SIZE, 1, 601 count * RT2560_RX_DESC_SIZE, 0, NULL, NULL, &ring->desc_dmat); 602 if (error != 0) { 603 device_printf(sc->sc_dev, "could not create desc DMA tag\n"); 604 goto fail; 605 } 606 607 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc, 608 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map); 609 if (error != 0) { 610 device_printf(sc->sc_dev, "could not allocate DMA memory\n"); 611 goto fail; 612 } 613 614 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc, 615 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr, 616 0); 617 if (error != 0) { 618 device_printf(sc->sc_dev, "could not load desc DMA map\n"); 619 goto fail; 620 } 621 622 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF, 623 M_NOWAIT | M_ZERO); 624 if (ring->data == NULL) { 625 device_printf(sc->sc_dev, "could not allocate soft data\n"); 626 error = ENOMEM; 627 goto fail; 628 } 629 630 /* 631 * Pre-allocate Rx buffers and populate Rx ring. 632 */ 633 error = bus_dma_tag_create(NULL, 1, 0, BUS_SPACE_MAXADDR_32BIT, 634 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, MCLBYTES, 0, NULL, 635 NULL, &ring->data_dmat); 636 if (error != 0) { 637 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 638 goto fail; 639 } 640 641 for (i = 0; i < count; i++) { 642 desc = &sc->rxq.desc[i]; 643 data = &sc->rxq.data[i]; 644 645 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 646 if (error != 0) { 647 device_printf(sc->sc_dev, "could not create DMA map\n"); 648 goto fail; 649 } 650 651 data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 652 if (data->m == NULL) { 653 device_printf(sc->sc_dev, 654 "could not allocate rx mbuf\n"); 655 error = ENOMEM; 656 goto fail; 657 } 658 659 error = bus_dmamap_load(ring->data_dmat, data->map, 660 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr, 661 &physaddr, 0); 662 if (error != 0) { 663 device_printf(sc->sc_dev, 664 "could not load rx buf DMA map"); 665 goto fail; 666 } 667 668 desc->flags = htole32(RT2560_RX_BUSY); 669 desc->physaddr = htole32(physaddr); 670 } 671 672 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 673 674 return 0; 675 676fail: rt2560_free_rx_ring(sc, ring); 677 return error; 678} 679 680static void 681rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 682{ 683 int i; 684 685 for (i = 0; i < ring->count; i++) { 686 ring->desc[i].flags = htole32(RT2560_RX_BUSY); 687 ring->data[i].drop = 0; 688 } 689 690 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE); 691 692 ring->cur = ring->next = 0; 693 ring->cur_decrypt = 0; 694} 695 696static void 697rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring) 698{ 699 struct rt2560_rx_data *data; 700 int i; 701 702 if (ring->desc != NULL) { 703 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, 704 BUS_DMASYNC_POSTWRITE); 705 bus_dmamap_unload(ring->desc_dmat, ring->desc_map); 706 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map); 707 } 708 709 if (ring->desc_dmat != NULL) 710 bus_dma_tag_destroy(ring->desc_dmat); 711 712 if (ring->data != NULL) { 713 for (i = 0; i < ring->count; i++) { 714 data = &ring->data[i]; 715 716 if (data->m != NULL) { 717 bus_dmamap_sync(ring->data_dmat, data->map, 718 BUS_DMASYNC_POSTREAD); 719 bus_dmamap_unload(ring->data_dmat, data->map); 720 m_freem(data->m); 721 } 722 723 if (data->map != NULL) 724 bus_dmamap_destroy(ring->data_dmat, data->map); 725 } 726 727 free(ring->data, M_DEVBUF); 728 } 729 730 if (ring->data_dmat != NULL) 731 bus_dma_tag_destroy(ring->data_dmat); 732} 733 734static struct ieee80211_node * 735rt2560_node_alloc(struct ieee80211_node_table *nt) 736{ 737 struct rt2560_node *rn; 738 739 rn = malloc(sizeof (struct rt2560_node), M_80211_NODE, 740 M_NOWAIT | M_ZERO); 741 742 return (rn != NULL) ? &rn->ni : NULL; 743} 744 745static int 746rt2560_media_change(struct ifnet *ifp) 747{ 748 struct rt2560_softc *sc = ifp->if_softc; 749 int error; 750 751 error = ieee80211_media_change(ifp); 752 if (error != ENETRESET) 753 return error; 754 755 if ((ifp->if_flags & IFF_UP) && 756 (ifp->if_drv_flags & IFF_DRV_RUNNING)) 757 rt2560_init(sc); 758 759 return 0; 760} 761 762/* 763 * This function is called periodically (every 200ms) during scanning to 764 * switch from one channel to another. 765 */ 766static void 767rt2560_next_scan(void *arg) 768{ 769 struct rt2560_softc *sc = arg; 770 struct ieee80211com *ic = &sc->sc_ic; 771 772 if (ic->ic_state == IEEE80211_S_SCAN) 773 ieee80211_next_scan(ic); 774} 775 776/* 777 * This function is called for each node present in the node station table. 778 */ 779static void 780rt2560_iter_func(void *arg, struct ieee80211_node *ni) 781{ 782 struct rt2560_node *rn = (struct rt2560_node *)ni; 783 784 ral_rssadapt_updatestats(&rn->rssadapt); 785} 786 787/* 788 * This function is called periodically (every 100ms) in RUN state to update 789 * the rate adaptation statistics. 790 */ 791static void 792rt2560_update_rssadapt(void *arg) 793{ 794 struct rt2560_softc *sc = arg; 795 struct ieee80211com *ic = &sc->sc_ic; 796 797 RAL_LOCK(sc); 798 799 ieee80211_iterate_nodes(&ic->ic_sta, rt2560_iter_func, arg); 800 callout_reset(&sc->rssadapt_ch, hz / 10, rt2560_update_rssadapt, sc); 801 802 RAL_UNLOCK(sc); 803} 804 805static int 806rt2560_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 807{ 808 struct rt2560_softc *sc = ic->ic_ifp->if_softc; 809 enum ieee80211_state ostate; 810 struct ieee80211_node *ni; 811 struct mbuf *m; 812 int error = 0; 813 814 ostate = ic->ic_state; 815 callout_stop(&sc->scan_ch); 816 817 switch (nstate) { 818 case IEEE80211_S_INIT: 819 callout_stop(&sc->rssadapt_ch); 820 821 if (ostate == IEEE80211_S_RUN) { 822 /* abort TSF synchronization */ 823 RAL_WRITE(sc, RT2560_CSR14, 0); 824 825 /* turn association led off */ 826 rt2560_update_led(sc, 0, 0); 827 } 828 break; 829 830 case IEEE80211_S_SCAN: 831 rt2560_set_chan(sc, ic->ic_curchan); 832 callout_reset(&sc->scan_ch, (sc->dwelltime * hz) / 1000, 833 rt2560_next_scan, sc); 834 break; 835 836 case IEEE80211_S_AUTH: 837 rt2560_set_chan(sc, ic->ic_curchan); 838 break; 839 840 case IEEE80211_S_ASSOC: 841 rt2560_set_chan(sc, ic->ic_curchan); 842 break; 843 844 case IEEE80211_S_RUN: 845 rt2560_set_chan(sc, ic->ic_curchan); 846 847 ni = ic->ic_bss; 848 849 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 850 rt2560_update_plcp(sc); 851 rt2560_set_basicrates(sc); 852 rt2560_set_bssid(sc, ni->ni_bssid); 853 } 854 855 if (ic->ic_opmode == IEEE80211_M_HOSTAP || 856 ic->ic_opmode == IEEE80211_M_IBSS) { 857 m = ieee80211_beacon_alloc(ic, ni, &sc->sc_bo); 858 if (m == NULL) { 859 device_printf(sc->sc_dev, 860 "could not allocate beacon\n"); 861 error = ENOBUFS; 862 break; 863 } 864 865 ieee80211_ref_node(ni); 866 error = rt2560_tx_bcn(sc, m, ni); 867 if (error != 0) 868 break; 869 } 870 871 /* turn assocation led on */ 872 rt2560_update_led(sc, 1, 0); 873 874 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 875 callout_reset(&sc->rssadapt_ch, hz / 10, 876 rt2560_update_rssadapt, sc); 877 878 rt2560_enable_tsf_sync(sc); 879 } 880 break; 881 } 882 883 return (error != 0) ? error : sc->sc_newstate(ic, nstate, arg); 884} 885 886/* 887 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or 888 * 93C66). 889 */ 890static uint16_t 891rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr) 892{ 893 uint32_t tmp; 894 uint16_t val; 895 int n; 896 897 /* clock C once before the first command */ 898 RT2560_EEPROM_CTL(sc, 0); 899 900 RT2560_EEPROM_CTL(sc, RT2560_S); 901 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 902 RT2560_EEPROM_CTL(sc, RT2560_S); 903 904 /* write start bit (1) */ 905 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 906 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 907 908 /* write READ opcode (10) */ 909 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D); 910 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C); 911 RT2560_EEPROM_CTL(sc, RT2560_S); 912 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 913 914 /* write address (A5-A0 or A7-A0) */ 915 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7; 916 for (; n >= 0; n--) { 917 RT2560_EEPROM_CTL(sc, RT2560_S | 918 (((addr >> n) & 1) << RT2560_SHIFT_D)); 919 RT2560_EEPROM_CTL(sc, RT2560_S | 920 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C); 921 } 922 923 RT2560_EEPROM_CTL(sc, RT2560_S); 924 925 /* read data Q15-Q0 */ 926 val = 0; 927 for (n = 15; n >= 0; n--) { 928 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C); 929 tmp = RAL_READ(sc, RT2560_CSR21); 930 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n; 931 RT2560_EEPROM_CTL(sc, RT2560_S); 932 } 933 934 RT2560_EEPROM_CTL(sc, 0); 935 936 /* clear Chip Select and clock C */ 937 RT2560_EEPROM_CTL(sc, RT2560_S); 938 RT2560_EEPROM_CTL(sc, 0); 939 RT2560_EEPROM_CTL(sc, RT2560_C); 940 941 return val; 942} 943 944/* 945 * Some frames were processed by the hardware cipher engine and are ready for 946 * transmission. 947 */ 948static void 949rt2560_encryption_intr(struct rt2560_softc *sc) 950{ 951 struct rt2560_tx_desc *desc; 952 int hw; 953 954 /* retrieve last descriptor index processed by cipher engine */ 955 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr; 956 hw /= RT2560_TX_DESC_SIZE; 957 958 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 959 BUS_DMASYNC_POSTREAD); 960 961 for (; sc->txq.next_encrypt != hw;) { 962 desc = &sc->txq.desc[sc->txq.next_encrypt]; 963 964 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 965 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY)) 966 break; 967 968 /* for TKIP, swap eiv field to fix a bug in ASIC */ 969 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) == 970 RT2560_TX_CIPHER_TKIP) 971 desc->eiv = bswap32(desc->eiv); 972 973 /* mark the frame ready for transmission */ 974 desc->flags |= htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 975 976 DPRINTFN(15, ("encryption done idx=%u\n", 977 sc->txq.next_encrypt)); 978 979 sc->txq.next_encrypt = 980 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT; 981 } 982 983 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 984 BUS_DMASYNC_PREWRITE); 985 986 /* kick Tx */ 987 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX); 988} 989 990static void 991rt2560_tx_intr(struct rt2560_softc *sc) 992{ 993 struct ieee80211com *ic = &sc->sc_ic; 994 struct ifnet *ifp = ic->ic_ifp; 995 struct rt2560_tx_desc *desc; 996 struct rt2560_tx_data *data; 997 struct rt2560_node *rn; 998 999 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1000 BUS_DMASYNC_POSTREAD); 1001 1002 for (;;) { 1003 desc = &sc->txq.desc[sc->txq.next]; 1004 data = &sc->txq.data[sc->txq.next]; 1005 1006 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1007 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY) || 1008 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1009 break; 1010 1011 rn = (struct rt2560_node *)data->ni; 1012 1013 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1014 case RT2560_TX_SUCCESS: 1015 DPRINTFN(10, ("data frame sent successfully\n")); 1016 if (data->id.id_node != NULL) { 1017 ral_rssadapt_raise_rate(ic, &rn->rssadapt, 1018 &data->id); 1019 } 1020 ifp->if_opackets++; 1021 break; 1022 1023 case RT2560_TX_SUCCESS_RETRY: 1024 DPRINTFN(9, ("data frame sent after %u retries\n", 1025 (le32toh(desc->flags) >> 5) & 0x7)); 1026 ifp->if_opackets++; 1027 break; 1028 1029 case RT2560_TX_FAIL_RETRY: 1030 DPRINTFN(9, ("sending data frame failed (too much " 1031 "retries)\n")); 1032 if (data->id.id_node != NULL) { 1033 ral_rssadapt_lower_rate(ic, data->ni, 1034 &rn->rssadapt, &data->id); 1035 } 1036 ifp->if_oerrors++; 1037 break; 1038 1039 case RT2560_TX_FAIL_INVALID: 1040 case RT2560_TX_FAIL_OTHER: 1041 default: 1042 device_printf(sc->sc_dev, "sending data frame failed " 1043 "0x%08x\n", le32toh(desc->flags)); 1044 ifp->if_oerrors++; 1045 } 1046 1047 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1048 BUS_DMASYNC_POSTWRITE); 1049 bus_dmamap_unload(sc->txq.data_dmat, data->map); 1050 m_freem(data->m); 1051 data->m = NULL; 1052 ieee80211_free_node(data->ni); 1053 data->ni = NULL; 1054 1055 /* descriptor is no longer valid */ 1056 desc->flags &= ~htole32(RT2560_TX_VALID); 1057 1058 DPRINTFN(15, ("tx done idx=%u\n", sc->txq.next)); 1059 1060 sc->txq.queued--; 1061 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT; 1062 } 1063 1064 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1065 BUS_DMASYNC_PREWRITE); 1066 1067 sc->sc_tx_timer = 0; 1068 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1069 rt2560_start(ifp); 1070} 1071 1072static void 1073rt2560_prio_intr(struct rt2560_softc *sc) 1074{ 1075 struct ieee80211com *ic = &sc->sc_ic; 1076 struct ifnet *ifp = ic->ic_ifp; 1077 struct rt2560_tx_desc *desc; 1078 struct rt2560_tx_data *data; 1079 1080 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1081 BUS_DMASYNC_POSTREAD); 1082 1083 for (;;) { 1084 desc = &sc->prioq.desc[sc->prioq.next]; 1085 data = &sc->prioq.data[sc->prioq.next]; 1086 1087 if ((le32toh(desc->flags) & RT2560_TX_BUSY) || 1088 !(le32toh(desc->flags) & RT2560_TX_VALID)) 1089 break; 1090 1091 switch (le32toh(desc->flags) & RT2560_TX_RESULT_MASK) { 1092 case RT2560_TX_SUCCESS: 1093 DPRINTFN(10, ("mgt frame sent successfully\n")); 1094 break; 1095 1096 case RT2560_TX_SUCCESS_RETRY: 1097 DPRINTFN(9, ("mgt frame sent after %u retries\n", 1098 (le32toh(desc->flags) >> 5) & 0x7)); 1099 break; 1100 1101 case RT2560_TX_FAIL_RETRY: 1102 DPRINTFN(9, ("sending mgt frame failed (too much " 1103 "retries)\n")); 1104 break; 1105 1106 case RT2560_TX_FAIL_INVALID: 1107 case RT2560_TX_FAIL_OTHER: 1108 default: 1109 device_printf(sc->sc_dev, "sending mgt frame failed " 1110 "0x%08x\n", le32toh(desc->flags)); 1111 } 1112 1113 bus_dmamap_sync(sc->prioq.data_dmat, data->map, 1114 BUS_DMASYNC_POSTWRITE); 1115 bus_dmamap_unload(sc->prioq.data_dmat, data->map); 1116 m_freem(data->m); 1117 data->m = NULL; 1118 ieee80211_free_node(data->ni); 1119 data->ni = NULL; 1120 1121 /* descriptor is no longer valid */ 1122 desc->flags &= ~htole32(RT2560_TX_VALID); 1123 1124 DPRINTFN(15, ("prio done idx=%u\n", sc->prioq.next)); 1125 1126 sc->prioq.queued--; 1127 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT; 1128 } 1129 1130 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1131 BUS_DMASYNC_PREWRITE); 1132 1133 sc->sc_tx_timer = 0; 1134 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1135 rt2560_start(ifp); 1136} 1137 1138/* 1139 * Some frames were processed by the hardware cipher engine and are ready for 1140 * transmission to the IEEE802.11 layer. 1141 */ 1142static void 1143rt2560_decryption_intr(struct rt2560_softc *sc) 1144{ 1145 struct ieee80211com *ic = &sc->sc_ic; 1146 struct ifnet *ifp = ic->ic_ifp; 1147 struct rt2560_rx_desc *desc; 1148 struct rt2560_rx_data *data; 1149 bus_addr_t physaddr; 1150 struct ieee80211_frame *wh; 1151 struct ieee80211_node *ni; 1152 struct rt2560_node *rn; 1153 struct mbuf *mnew, *m; 1154 int hw, error; 1155 1156 /* retrieve last decriptor index processed by cipher engine */ 1157 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr; 1158 hw /= RT2560_RX_DESC_SIZE; 1159 1160 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1161 BUS_DMASYNC_POSTREAD); 1162 1163 for (; sc->rxq.cur_decrypt != hw;) { 1164 desc = &sc->rxq.desc[sc->rxq.cur_decrypt]; 1165 data = &sc->rxq.data[sc->rxq.cur_decrypt]; 1166 1167 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1168 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1169 break; 1170 1171 if (data->drop) { 1172 ifp->if_ierrors++; 1173 goto skip; 1174 } 1175 1176 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 && 1177 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) { 1178 ifp->if_ierrors++; 1179 goto skip; 1180 } 1181 1182 /* 1183 * Try to allocate a new mbuf for this ring element and load it 1184 * before processing the current mbuf. If the ring element 1185 * cannot be loaded, drop the received packet and reuse the old 1186 * mbuf. In the unlikely case that the old mbuf can't be 1187 * reloaded either, explicitly panic. 1188 */ 1189 mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); 1190 if (mnew == NULL) { 1191 ifp->if_ierrors++; 1192 goto skip; 1193 } 1194 1195 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1196 BUS_DMASYNC_POSTREAD); 1197 bus_dmamap_unload(sc->rxq.data_dmat, data->map); 1198 1199 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1200 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr, 1201 &physaddr, 0); 1202 if (error != 0) { 1203 m_freem(mnew); 1204 1205 /* try to reload the old mbuf */ 1206 error = bus_dmamap_load(sc->rxq.data_dmat, data->map, 1207 mtod(data->m, void *), MCLBYTES, 1208 rt2560_dma_map_addr, &physaddr, 0); 1209 if (error != 0) { 1210 /* very unlikely that it will fail... */ 1211 panic("%s: could not load old rx mbuf", 1212 device_get_name(sc->sc_dev)); 1213 } 1214 ifp->if_ierrors++; 1215 goto skip; 1216 } 1217 1218 /* 1219 * New mbuf successfully loaded, update Rx ring and continue 1220 * processing. 1221 */ 1222 m = data->m; 1223 data->m = mnew; 1224 desc->physaddr = htole32(physaddr); 1225 1226 /* finalize mbuf */ 1227 m->m_pkthdr.rcvif = ifp; 1228 m->m_pkthdr.len = m->m_len = 1229 (le32toh(desc->flags) >> 16) & 0xfff; 1230 1231 if (bpf_peers_present(sc->sc_drvbpf)) { 1232 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap; 1233 uint32_t tsf_lo, tsf_hi; 1234 1235 /* get timestamp (low and high 32 bits) */ 1236 tsf_hi = RAL_READ(sc, RT2560_CSR17); 1237 tsf_lo = RAL_READ(sc, RT2560_CSR16); 1238 1239 tap->wr_tsf = 1240 htole64(((uint64_t)tsf_hi << 32) | tsf_lo); 1241 tap->wr_flags = 0; 1242 tap->wr_rate = rt2560_rxrate(desc); 1243 tap->wr_chan_freq = htole16(ic->ic_curchan->ic_freq); 1244 tap->wr_chan_flags = htole16(ic->ic_curchan->ic_flags); 1245 tap->wr_antenna = sc->rx_ant; 1246 tap->wr_antsignal = desc->rssi; 1247 1248 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1249 } 1250 1251 wh = mtod(m, struct ieee80211_frame *); 1252 ni = ieee80211_find_rxnode(ic, 1253 (struct ieee80211_frame_min *)wh); 1254 1255 /* send the frame to the 802.11 layer */ 1256 ieee80211_input(ic, m, ni, desc->rssi, 0); 1257 1258 /* give rssi to the rate adatation algorithm */ 1259 rn = (struct rt2560_node *)ni; 1260 ral_rssadapt_input(ic, ni, &rn->rssadapt, desc->rssi); 1261 1262 /* node is no longer needed */ 1263 ieee80211_free_node(ni); 1264 1265skip: desc->flags = htole32(RT2560_RX_BUSY); 1266 1267 DPRINTFN(15, ("decryption done idx=%u\n", sc->rxq.cur_decrypt)); 1268 1269 sc->rxq.cur_decrypt = 1270 (sc->rxq.cur_decrypt + 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 1277/* 1278 * Some frames were received. Pass them to the hardware cipher engine before 1279 * sending them to the 802.11 layer. 1280 */ 1281static void 1282rt2560_rx_intr(struct rt2560_softc *sc) 1283{ 1284 struct rt2560_rx_desc *desc; 1285 struct rt2560_rx_data *data; 1286 1287 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1288 BUS_DMASYNC_POSTREAD); 1289 1290 for (;;) { 1291 desc = &sc->rxq.desc[sc->rxq.cur]; 1292 data = &sc->rxq.data[sc->rxq.cur]; 1293 1294 if ((le32toh(desc->flags) & RT2560_RX_BUSY) || 1295 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY)) 1296 break; 1297 1298 data->drop = 0; 1299 1300 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) || 1301 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) { 1302 /* 1303 * This should not happen since we did not request 1304 * to receive those frames when we filled RXCSR0. 1305 */ 1306 DPRINTFN(5, ("PHY or CRC error flags 0x%08x\n", 1307 le32toh(desc->flags))); 1308 data->drop = 1; 1309 } 1310 1311 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) { 1312 DPRINTFN(5, ("bad length\n")); 1313 data->drop = 1; 1314 } 1315 1316 /* mark the frame for decryption */ 1317 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY); 1318 1319 DPRINTFN(15, ("rx done idx=%u\n", sc->rxq.cur)); 1320 1321 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT; 1322 } 1323 1324 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map, 1325 BUS_DMASYNC_PREWRITE); 1326 1327 /* kick decrypt */ 1328 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT); 1329} 1330 1331/* 1332 * This function is called periodically in IBSS mode when a new beacon must be 1333 * sent out. 1334 */ 1335static void 1336rt2560_beacon_expire(struct rt2560_softc *sc) 1337{ 1338 struct ieee80211com *ic = &sc->sc_ic; 1339 struct rt2560_tx_data *data; 1340 1341 if (ic->ic_opmode != IEEE80211_M_IBSS && 1342 ic->ic_opmode != IEEE80211_M_HOSTAP) 1343 return; 1344 1345 data = &sc->bcnq.data[sc->bcnq.next]; 1346 1347 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE); 1348 bus_dmamap_unload(sc->bcnq.data_dmat, data->map); 1349 1350 ieee80211_beacon_update(ic, data->ni, &sc->sc_bo, data->m, 1); 1351 1352 if (bpf_peers_present(ic->ic_rawbpf)) 1353 bpf_mtap(ic->ic_rawbpf, data->m); 1354 1355 rt2560_tx_bcn(sc, data->m, data->ni); 1356 1357 DPRINTFN(15, ("beacon expired\n")); 1358 1359 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT; 1360} 1361 1362/* ARGSUSED */ 1363static void 1364rt2560_wakeup_expire(struct rt2560_softc *sc) 1365{ 1366 DPRINTFN(2, ("wakeup expired\n")); 1367} 1368 1369void 1370rt2560_intr(void *arg) 1371{ 1372 struct rt2560_softc *sc = arg; 1373 struct ifnet *ifp = sc->sc_ifp; 1374 uint32_t r; 1375 1376 RAL_LOCK(sc); 1377 1378 /* disable interrupts */ 1379 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 1380 1381 /* don't re-enable interrupts if we're shutting down */ 1382 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 1383 RAL_UNLOCK(sc); 1384 return; 1385 } 1386 1387 r = RAL_READ(sc, RT2560_CSR7); 1388 RAL_WRITE(sc, RT2560_CSR7, r); 1389 1390 if (r & RT2560_BEACON_EXPIRE) 1391 rt2560_beacon_expire(sc); 1392 1393 if (r & RT2560_WAKEUP_EXPIRE) 1394 rt2560_wakeup_expire(sc); 1395 1396 if (r & RT2560_ENCRYPTION_DONE) 1397 rt2560_encryption_intr(sc); 1398 1399 if (r & RT2560_TX_DONE) 1400 rt2560_tx_intr(sc); 1401 1402 if (r & RT2560_PRIO_DONE) 1403 rt2560_prio_intr(sc); 1404 1405 if (r & RT2560_DECRYPTION_DONE) 1406 rt2560_decryption_intr(sc); 1407 1408 if (r & RT2560_RX_DONE) 1409 rt2560_rx_intr(sc); 1410 1411 /* re-enable interrupts */ 1412 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 1413 1414 RAL_UNLOCK(sc); 1415} 1416 1417/* quickly determine if a given rate is CCK or OFDM */ 1418#define RAL_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1419 1420#define RAL_ACK_SIZE 14 /* 10 + 4(FCS) */ 1421#define RAL_CTS_SIZE 14 /* 10 + 4(FCS) */ 1422 1423#define RAL_SIFS 10 /* us */ 1424 1425#define RT2560_TXRX_TURNAROUND 10 /* us */ 1426 1427/* 1428 * This function is only used by the Rx radiotap code. 1429 */ 1430static uint8_t 1431rt2560_rxrate(struct rt2560_rx_desc *desc) 1432{ 1433 if (le32toh(desc->flags) & RT2560_RX_OFDM) { 1434 /* reverse function of rt2560_plcp_signal */ 1435 switch (desc->rate) { 1436 case 0xb: return 12; 1437 case 0xf: return 18; 1438 case 0xa: return 24; 1439 case 0xe: return 36; 1440 case 0x9: return 48; 1441 case 0xd: return 72; 1442 case 0x8: return 96; 1443 case 0xc: return 108; 1444 } 1445 } else { 1446 if (desc->rate == 10) 1447 return 2; 1448 if (desc->rate == 20) 1449 return 4; 1450 if (desc->rate == 55) 1451 return 11; 1452 if (desc->rate == 110) 1453 return 22; 1454 } 1455 return 2; /* should not get there */ 1456} 1457 1458/* 1459 * Return the expected ack rate for a frame transmitted at rate `rate'. 1460 * XXX: this should depend on the destination node basic rate set. 1461 */ 1462static int 1463rt2560_ack_rate(struct ieee80211com *ic, int rate) 1464{ 1465 switch (rate) { 1466 /* CCK rates */ 1467 case 2: 1468 return 2; 1469 case 4: 1470 case 11: 1471 case 22: 1472 return (ic->ic_curmode == IEEE80211_MODE_11B) ? 4 : rate; 1473 1474 /* OFDM rates */ 1475 case 12: 1476 case 18: 1477 return 12; 1478 case 24: 1479 case 36: 1480 return 24; 1481 case 48: 1482 case 72: 1483 case 96: 1484 case 108: 1485 return 48; 1486 } 1487 1488 /* default to 1Mbps */ 1489 return 2; 1490} 1491 1492/* 1493 * Compute the duration (in us) needed to transmit `len' bytes at rate `rate'. 1494 * The function automatically determines the operating mode depending on the 1495 * given rate. `flags' indicates whether short preamble is in use or not. 1496 */ 1497static uint16_t 1498rt2560_txtime(int len, int rate, uint32_t flags) 1499{ 1500 uint16_t txtime; 1501 1502 if (RAL_RATE_IS_OFDM(rate)) { 1503 /* IEEE Std 802.11a-1999, pp. 37 */ 1504 txtime = (8 + 4 * len + 3 + rate - 1) / rate; 1505 txtime = 16 + 4 + 4 * txtime + 6; 1506 } else { 1507 /* IEEE Std 802.11b-1999, pp. 28 */ 1508 txtime = (16 * len + rate - 1) / rate; 1509 if (rate != 2 && (flags & IEEE80211_F_SHPREAMBLE)) 1510 txtime += 72 + 24; 1511 else 1512 txtime += 144 + 48; 1513 } 1514 1515 return txtime; 1516} 1517 1518static uint8_t 1519rt2560_plcp_signal(int rate) 1520{ 1521 switch (rate) { 1522 /* CCK rates (returned values are device-dependent) */ 1523 case 2: return 0x0; 1524 case 4: return 0x1; 1525 case 11: return 0x2; 1526 case 22: return 0x3; 1527 1528 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1529 case 12: return 0xb; 1530 case 18: return 0xf; 1531 case 24: return 0xa; 1532 case 36: return 0xe; 1533 case 48: return 0x9; 1534 case 72: return 0xd; 1535 case 96: return 0x8; 1536 case 108: return 0xc; 1537 1538 /* unsupported rates (should not get there) */ 1539 default: return 0xff; 1540 } 1541} 1542 1543static void 1544rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc, 1545 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr) 1546{ 1547 struct ieee80211com *ic = &sc->sc_ic; 1548 uint16_t plcp_length; 1549 int remainder; 1550 1551 desc->flags = htole32(flags); 1552 desc->flags |= htole32(len << 16); 1553 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY) : 1554 htole32(RT2560_TX_BUSY | RT2560_TX_VALID); 1555 1556 desc->physaddr = htole32(physaddr); 1557 desc->wme = htole16( 1558 RT2560_AIFSN(2) | 1559 RT2560_LOGCWMIN(3) | 1560 RT2560_LOGCWMAX(8)); 1561 1562 /* setup PLCP fields */ 1563 desc->plcp_signal = rt2560_plcp_signal(rate); 1564 desc->plcp_service = 4; 1565 1566 len += IEEE80211_CRC_LEN; 1567 if (RAL_RATE_IS_OFDM(rate)) { 1568 desc->flags |= htole32(RT2560_TX_OFDM); 1569 1570 plcp_length = len & 0xfff; 1571 desc->plcp_length_hi = plcp_length >> 6; 1572 desc->plcp_length_lo = plcp_length & 0x3f; 1573 } else { 1574 plcp_length = (16 * len + rate - 1) / rate; 1575 if (rate == 22) { 1576 remainder = (16 * len) % 22; 1577 if (remainder != 0 && remainder < 7) 1578 desc->plcp_service |= RT2560_PLCP_LENGEXT; 1579 } 1580 desc->plcp_length_hi = plcp_length >> 8; 1581 desc->plcp_length_lo = plcp_length & 0xff; 1582 1583 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE)) 1584 desc->plcp_signal |= 0x08; 1585 } 1586} 1587 1588static int 1589rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0, 1590 struct ieee80211_node *ni) 1591{ 1592 struct ieee80211com *ic = &sc->sc_ic; 1593 struct rt2560_tx_desc *desc; 1594 struct rt2560_tx_data *data; 1595 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1596 int nsegs, rate, error; 1597 1598 desc = &sc->bcnq.desc[sc->bcnq.cur]; 1599 data = &sc->bcnq.data[sc->bcnq.cur]; 1600 1601 rate = IEEE80211_IS_CHAN_5GHZ(ni->ni_chan) ? 12 : 2; 1602 1603 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0, 1604 segs, &nsegs, BUS_DMA_NOWAIT); 1605 if (error != 0) { 1606 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1607 error); 1608 m_freem(m0); 1609 return error; 1610 } 1611 1612 if (bpf_peers_present(sc->sc_drvbpf)) { 1613 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1614 1615 tap->wt_flags = 0; 1616 tap->wt_rate = rate; 1617 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1618 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1619 tap->wt_antenna = sc->tx_ant; 1620 1621 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1622 } 1623 1624 data->m = m0; 1625 data->ni = ni; 1626 1627 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF | 1628 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr); 1629 1630 DPRINTFN(10, ("sending beacon frame len=%u idx=%u rate=%u\n", 1631 m0->m_pkthdr.len, sc->bcnq.cur, rate)); 1632 1633 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1634 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map, 1635 BUS_DMASYNC_PREWRITE); 1636 1637 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT; 1638 1639 return 0; 1640} 1641 1642static int 1643rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0, 1644 struct ieee80211_node *ni) 1645{ 1646 struct ieee80211com *ic = &sc->sc_ic; 1647 struct rt2560_tx_desc *desc; 1648 struct rt2560_tx_data *data; 1649 struct ieee80211_frame *wh; 1650 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1651 uint16_t dur; 1652 uint32_t flags = 0; 1653 int nsegs, rate, error; 1654 1655 desc = &sc->prioq.desc[sc->prioq.cur]; 1656 data = &sc->prioq.data[sc->prioq.cur]; 1657 1658 rate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1659 1660 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1661 segs, &nsegs, 0); 1662 if (error != 0) { 1663 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1664 error); 1665 m_freem(m0); 1666 return error; 1667 } 1668 1669 if (bpf_peers_present(sc->sc_drvbpf)) { 1670 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1671 1672 tap->wt_flags = 0; 1673 tap->wt_rate = rate; 1674 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1675 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1676 tap->wt_antenna = sc->tx_ant; 1677 1678 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1679 } 1680 1681 data->m = m0; 1682 data->ni = ni; 1683 1684 wh = mtod(m0, struct ieee80211_frame *); 1685 1686 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1687 flags |= RT2560_TX_ACK; 1688 1689 dur = rt2560_txtime(RAL_ACK_SIZE, rate, ic->ic_flags) + 1690 RAL_SIFS; 1691 *(uint16_t *)wh->i_dur = htole16(dur); 1692 1693 /* tell hardware to add timestamp for probe responses */ 1694 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1695 IEEE80211_FC0_TYPE_MGT && 1696 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1697 IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1698 flags |= RT2560_TX_TIMESTAMP; 1699 } 1700 1701 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0, 1702 segs->ds_addr); 1703 1704 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1705 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1706 BUS_DMASYNC_PREWRITE); 1707 1708 DPRINTFN(10, ("sending mgt frame len=%u idx=%u rate=%u\n", 1709 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1710 1711 /* kick prio */ 1712 sc->prioq.queued++; 1713 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1714 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1715 1716 return 0; 1717} 1718 1719static int 1720rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0, 1721 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params) 1722{ 1723 struct ieee80211com *ic = &sc->sc_ic; 1724 struct rt2560_tx_desc *desc; 1725 struct rt2560_tx_data *data; 1726 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1727 uint32_t flags; 1728 int nsegs, rate, error; 1729 1730 desc = &sc->prioq.desc[sc->prioq.cur]; 1731 data = &sc->prioq.data[sc->prioq.cur]; 1732 1733 rate = params->ibp_rate0 & IEEE80211_RATE_VAL; 1734 /* XXX validate */ 1735 if (rate == 0) 1736 return EINVAL; 1737 1738 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0, 1739 segs, &nsegs, 0); 1740 if (error != 0) { 1741 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1742 error); 1743 m_freem(m0); 1744 return error; 1745 } 1746 1747 if (bpf_peers_present(sc->sc_drvbpf)) { 1748 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1749 1750 tap->wt_flags = 0; 1751 tap->wt_rate = rate; 1752 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1753 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1754 tap->wt_antenna = sc->tx_ant; 1755 1756 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1757 } 1758 1759 data->m = m0; 1760 data->ni = ni; 1761 1762 flags = 0; 1763 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0) 1764 flags |= RT2560_TX_ACK; 1765 1766 /* XXX need to setup descriptor ourself */ 1767 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, 1768 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0, 1769 segs->ds_addr); 1770 1771 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1772 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map, 1773 BUS_DMASYNC_PREWRITE); 1774 1775 DPRINTFN(10, ("sending raw frame len=%u idx=%u rate=%u\n", 1776 m0->m_pkthdr.len, sc->prioq.cur, rate)); 1777 1778 /* kick prio */ 1779 sc->prioq.queued++; 1780 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT; 1781 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO); 1782 1783 return 0; 1784} 1785 1786/* 1787 * Build a RTS control frame. 1788 */ 1789static struct mbuf * 1790rt2560_get_rts(struct rt2560_softc *sc, struct ieee80211_frame *wh, 1791 uint16_t dur) 1792{ 1793 struct ieee80211_frame_rts *rts; 1794 struct mbuf *m; 1795 1796 MGETHDR(m, M_DONTWAIT, MT_DATA); 1797 if (m == NULL) { 1798 sc->sc_ic.ic_stats.is_tx_nobuf++; 1799 device_printf(sc->sc_dev, "could not allocate RTS frame\n"); 1800 return NULL; 1801 } 1802 1803 rts = mtod(m, struct ieee80211_frame_rts *); 1804 1805 rts->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_CTL | 1806 IEEE80211_FC0_SUBTYPE_RTS; 1807 rts->i_fc[1] = IEEE80211_FC1_DIR_NODS; 1808 *(uint16_t *)rts->i_dur = htole16(dur); 1809 IEEE80211_ADDR_COPY(rts->i_ra, wh->i_addr1); 1810 IEEE80211_ADDR_COPY(rts->i_ta, wh->i_addr2); 1811 1812 m->m_pkthdr.len = m->m_len = sizeof (struct ieee80211_frame_rts); 1813 1814 return m; 1815} 1816 1817static int 1818rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0, 1819 struct ieee80211_node *ni) 1820{ 1821 struct ieee80211com *ic = &sc->sc_ic; 1822 struct rt2560_tx_desc *desc; 1823 struct rt2560_tx_data *data; 1824 struct rt2560_node *rn; 1825 struct ieee80211_rateset *rs; 1826 struct ieee80211_frame *wh; 1827 struct ieee80211_key *k; 1828 struct mbuf *mnew; 1829 bus_dma_segment_t segs[RT2560_MAX_SCATTER]; 1830 uint16_t dur; 1831 uint32_t flags = 0; 1832 int nsegs, rate, error; 1833 1834 wh = mtod(m0, struct ieee80211_frame *); 1835 1836 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) { 1837 rs = &ic->ic_sup_rates[ic->ic_curmode]; 1838 rate = rs->rs_rates[ic->ic_fixed_rate]; 1839 } else { 1840 rs = &ni->ni_rates; 1841 rn = (struct rt2560_node *)ni; 1842 ni->ni_txrate = ral_rssadapt_choose(&rn->rssadapt, rs, wh, 1843 m0->m_pkthdr.len, NULL, 0); 1844 rate = rs->rs_rates[ni->ni_txrate]; 1845 } 1846 rate &= IEEE80211_RATE_VAL; 1847 1848 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1849 k = ieee80211_crypto_encap(ic, ni, m0); 1850 if (k == NULL) { 1851 m_freem(m0); 1852 return ENOBUFS; 1853 } 1854 1855 /* packet header may have moved, reset our local pointer */ 1856 wh = mtod(m0, struct ieee80211_frame *); 1857 } 1858 1859 /* 1860 * IEEE Std 802.11-1999, pp 82: "A STA shall use an RTS/CTS exchange 1861 * for directed frames only when the length of the MPDU is greater 1862 * than the length threshold indicated by [...]" ic_rtsthreshold. 1863 */ 1864 if (!IEEE80211_IS_MULTICAST(wh->i_addr1) && 1865 m0->m_pkthdr.len > ic->ic_rtsthreshold) { 1866 struct mbuf *m; 1867 uint16_t dur; 1868 int rtsrate, ackrate; 1869 1870 rtsrate = IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan) ? 12 : 2; 1871 ackrate = rt2560_ack_rate(ic, rate); 1872 1873 dur = rt2560_txtime(m0->m_pkthdr.len + 4, rate, ic->ic_flags) + 1874 rt2560_txtime(RAL_CTS_SIZE, rtsrate, ic->ic_flags) + 1875 rt2560_txtime(RAL_ACK_SIZE, ackrate, ic->ic_flags) + 1876 3 * RAL_SIFS; 1877 1878 m = rt2560_get_rts(sc, wh, dur); 1879 1880 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1881 data = &sc->txq.data[sc->txq.cur_encrypt]; 1882 1883 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1884 m, segs, &nsegs, 0); 1885 if (error != 0) { 1886 device_printf(sc->sc_dev, 1887 "could not map mbuf (error %d)\n", error); 1888 m_freem(m); 1889 m_freem(m0); 1890 return error; 1891 } 1892 1893 /* avoid multiple free() of the same node for each fragment */ 1894 ieee80211_ref_node(ni); 1895 1896 data->m = m; 1897 data->ni = ni; 1898 1899 /* RTS frames are not taken into account for rssadapt */ 1900 data->id.id_node = NULL; 1901 1902 rt2560_setup_tx_desc(sc, desc, RT2560_TX_ACK | 1903 RT2560_TX_MORE_FRAG, m->m_pkthdr.len, rtsrate, 1, 1904 segs->ds_addr); 1905 1906 bus_dmamap_sync(sc->txq.data_dmat, data->map, 1907 BUS_DMASYNC_PREWRITE); 1908 1909 sc->txq.queued++; 1910 sc->txq.cur_encrypt = 1911 (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 1912 1913 /* 1914 * IEEE Std 802.11-1999: when an RTS/CTS exchange is used, the 1915 * asynchronous data frame shall be transmitted after the CTS 1916 * frame and a SIFS period. 1917 */ 1918 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS; 1919 } 1920 1921 data = &sc->txq.data[sc->txq.cur_encrypt]; 1922 desc = &sc->txq.desc[sc->txq.cur_encrypt]; 1923 1924 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0, 1925 segs, &nsegs, 0); 1926 if (error != 0 && error != EFBIG) { 1927 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1928 error); 1929 m_freem(m0); 1930 return error; 1931 } 1932 if (error != 0) { 1933 mnew = m_defrag(m0, M_DONTWAIT); 1934 if (mnew == NULL) { 1935 device_printf(sc->sc_dev, 1936 "could not defragment mbuf\n"); 1937 m_freem(m0); 1938 return ENOBUFS; 1939 } 1940 m0 = mnew; 1941 1942 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, 1943 m0, segs, &nsegs, 0); 1944 if (error != 0) { 1945 device_printf(sc->sc_dev, 1946 "could not map mbuf (error %d)\n", error); 1947 m_freem(m0); 1948 return error; 1949 } 1950 1951 /* packet header may have moved, reset our local pointer */ 1952 wh = mtod(m0, struct ieee80211_frame *); 1953 } 1954 1955 if (bpf_peers_present(sc->sc_drvbpf)) { 1956 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap; 1957 1958 tap->wt_flags = 0; 1959 tap->wt_rate = rate; 1960 tap->wt_chan_freq = htole16(ic->ic_curchan->ic_freq); 1961 tap->wt_chan_flags = htole16(ic->ic_curchan->ic_flags); 1962 tap->wt_antenna = sc->tx_ant; 1963 1964 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1965 } 1966 1967 data->m = m0; 1968 data->ni = ni; 1969 1970 /* remember link conditions for rate adaptation algorithm */ 1971 if (ic->ic_fixed_rate == IEEE80211_FIXED_RATE_NONE) { 1972 data->id.id_len = m0->m_pkthdr.len; 1973 data->id.id_rateidx = ni->ni_txrate; 1974 data->id.id_node = ni; 1975 data->id.id_rssi = ni->ni_rssi; 1976 } else 1977 data->id.id_node = NULL; 1978 1979 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1980 flags |= RT2560_TX_ACK; 1981 1982 dur = rt2560_txtime(RAL_ACK_SIZE, rt2560_ack_rate(ic, rate), 1983 ic->ic_flags) + RAL_SIFS; 1984 *(uint16_t *)wh->i_dur = htole16(dur); 1985 } 1986 1987 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1, 1988 segs->ds_addr); 1989 1990 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1991 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map, 1992 BUS_DMASYNC_PREWRITE); 1993 1994 DPRINTFN(10, ("sending data frame len=%u idx=%u rate=%u\n", 1995 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate)); 1996 1997 /* kick encrypt */ 1998 sc->txq.queued++; 1999 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT; 2000 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT); 2001 2002 return 0; 2003} 2004 2005static void 2006rt2560_start(struct ifnet *ifp) 2007{ 2008 struct rt2560_softc *sc = ifp->if_softc; 2009 struct ieee80211com *ic = &sc->sc_ic; 2010 struct mbuf *m0; 2011 struct ether_header *eh; 2012 struct ieee80211_node *ni; 2013 2014 RAL_LOCK(sc); 2015 2016 /* prevent management frames from being sent if we're not ready */ 2017 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2018 RAL_UNLOCK(sc); 2019 return; 2020 } 2021 2022 for (;;) { 2023 IF_POLL(&ic->ic_mgtq, m0); 2024 if (m0 != NULL) { 2025 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2026 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2027 break; 2028 } 2029 IF_DEQUEUE(&ic->ic_mgtq, m0); 2030 2031 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 2032 m0->m_pkthdr.rcvif = NULL; 2033 2034 if (bpf_peers_present(ic->ic_rawbpf)) 2035 bpf_mtap(ic->ic_rawbpf, m0); 2036 2037 if (rt2560_tx_mgt(sc, m0, ni) != 0) 2038 break; 2039 2040 } else { 2041 if (ic->ic_state != IEEE80211_S_RUN) 2042 break; 2043 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0); 2044 if (m0 == NULL) 2045 break; 2046 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) { 2047 IFQ_DRV_PREPEND(&ifp->if_snd, m0); 2048 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2049 break; 2050 } 2051 2052 if (m0->m_len < sizeof (struct ether_header) && 2053 !(m0 = m_pullup(m0, sizeof (struct ether_header)))) 2054 continue; 2055 2056 eh = mtod(m0, struct ether_header *); 2057 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 2058 if (ni == NULL) { 2059 m_freem(m0); 2060 continue; 2061 } 2062 BPF_MTAP(ifp, m0); 2063 2064 m0 = ieee80211_encap(ic, m0, ni); 2065 if (m0 == NULL) { 2066 ieee80211_free_node(ni); 2067 continue; 2068 } 2069 2070 if (bpf_peers_present(ic->ic_rawbpf)) 2071 bpf_mtap(ic->ic_rawbpf, m0); 2072 2073 if (rt2560_tx_data(sc, m0, ni) != 0) { 2074 ieee80211_free_node(ni); 2075 ifp->if_oerrors++; 2076 break; 2077 } 2078 } 2079 2080 sc->sc_tx_timer = 5; 2081 ifp->if_timer = 1; 2082 } 2083 2084 RAL_UNLOCK(sc); 2085} 2086 2087static void 2088rt2560_watchdog(struct ifnet *ifp) 2089{ 2090 struct rt2560_softc *sc = ifp->if_softc; 2091 struct ieee80211com *ic = &sc->sc_ic; 2092 2093 RAL_LOCK(sc); 2094 2095 ifp->if_timer = 0; 2096 2097 if (sc->sc_tx_timer > 0) { 2098 if (--sc->sc_tx_timer == 0) { 2099 device_printf(sc->sc_dev, "device timeout\n"); 2100 rt2560_init(sc); 2101 ifp->if_oerrors++; 2102 RAL_UNLOCK(sc); 2103 return; 2104 } 2105 ifp->if_timer = 1; 2106 } 2107 2108 ieee80211_watchdog(ic); 2109 2110 RAL_UNLOCK(sc); 2111} 2112 2113/* 2114 * This function allows for fast channel switching in monitor mode (used by 2115 * net-mgmt/kismet). In IBSS mode, we must explicitly reset the interface to 2116 * generate a new beacon frame. 2117 */ 2118static int 2119rt2560_reset(struct ifnet *ifp) 2120{ 2121 struct rt2560_softc *sc = ifp->if_softc; 2122 struct ieee80211com *ic = &sc->sc_ic; 2123 2124 if (ic->ic_opmode != IEEE80211_M_MONITOR) 2125 return ENETRESET; 2126 2127 rt2560_set_chan(sc, ic->ic_curchan); 2128 2129 return 0; 2130} 2131 2132static int 2133rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2134{ 2135 struct rt2560_softc *sc = ifp->if_softc; 2136 struct ieee80211com *ic = &sc->sc_ic; 2137 int error = 0; 2138 2139 RAL_LOCK(sc); 2140 2141 switch (cmd) { 2142 case SIOCSIFFLAGS: 2143 if (ifp->if_flags & IFF_UP) { 2144 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2145 rt2560_update_promisc(sc); 2146 else 2147 rt2560_init(sc); 2148 } else { 2149 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 2150 rt2560_stop(sc); 2151 } 2152 break; 2153 2154 default: 2155 error = ieee80211_ioctl(ic, cmd, data); 2156 } 2157 2158 if (error == ENETRESET) { 2159 if ((ifp->if_flags & IFF_UP) && 2160 (ifp->if_drv_flags & IFF_DRV_RUNNING) && 2161 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2162 rt2560_init(sc); 2163 error = 0; 2164 } 2165 2166 RAL_UNLOCK(sc); 2167 2168 return error; 2169} 2170 2171static void 2172rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val) 2173{ 2174 uint32_t tmp; 2175 int ntries; 2176 2177 for (ntries = 0; ntries < 100; ntries++) { 2178 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY)) 2179 break; 2180 DELAY(1); 2181 } 2182 if (ntries == 100) { 2183 device_printf(sc->sc_dev, "could not write to BBP\n"); 2184 return; 2185 } 2186 2187 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val; 2188 RAL_WRITE(sc, RT2560_BBPCSR, tmp); 2189 2190 DPRINTFN(15, ("BBP R%u <- 0x%02x\n", reg, val)); 2191} 2192 2193static uint8_t 2194rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg) 2195{ 2196 uint32_t val; 2197 int ntries; 2198 2199 val = RT2560_BBP_BUSY | reg << 8; 2200 RAL_WRITE(sc, RT2560_BBPCSR, val); 2201 2202 for (ntries = 0; ntries < 100; ntries++) { 2203 val = RAL_READ(sc, RT2560_BBPCSR); 2204 if (!(val & RT2560_BBP_BUSY)) 2205 return val & 0xff; 2206 DELAY(1); 2207 } 2208 2209 device_printf(sc->sc_dev, "could not read from BBP\n"); 2210 return 0; 2211} 2212 2213static void 2214rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val) 2215{ 2216 uint32_t tmp; 2217 int ntries; 2218 2219 for (ntries = 0; ntries < 100; ntries++) { 2220 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY)) 2221 break; 2222 DELAY(1); 2223 } 2224 if (ntries == 100) { 2225 device_printf(sc->sc_dev, "could not write to RF\n"); 2226 return; 2227 } 2228 2229 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 | 2230 (reg & 0x3); 2231 RAL_WRITE(sc, RT2560_RFCSR, tmp); 2232 2233 /* remember last written value in sc */ 2234 sc->rf_regs[reg] = val; 2235 2236 DPRINTFN(15, ("RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff)); 2237} 2238 2239static void 2240rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c) 2241{ 2242 struct ieee80211com *ic = &sc->sc_ic; 2243 uint8_t power, tmp; 2244 u_int i, chan; 2245 2246 chan = ieee80211_chan2ieee(ic, c); 2247 if (chan == 0 || chan == IEEE80211_CHAN_ANY) 2248 return; 2249 2250 if (IEEE80211_IS_CHAN_2GHZ(c)) 2251 power = min(sc->txpow[chan - 1], 31); 2252 else 2253 power = 31; 2254 2255 /* adjust txpower using ifconfig settings */ 2256 power -= (100 - ic->ic_txpowlimit) / 8; 2257 2258 DPRINTFN(2, ("setting channel to %u, txpower to %u\n", chan, power)); 2259 2260 switch (sc->rf_rev) { 2261 case RT2560_RF_2522: 2262 rt2560_rf_write(sc, RAL_RF1, 0x00814); 2263 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]); 2264 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2265 break; 2266 2267 case RT2560_RF_2523: 2268 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2269 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]); 2270 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044); 2271 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2272 break; 2273 2274 case RT2560_RF_2524: 2275 rt2560_rf_write(sc, RAL_RF1, 0x0c808); 2276 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]); 2277 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2278 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2279 break; 2280 2281 case RT2560_RF_2525: 2282 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2283 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]); 2284 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2285 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2286 2287 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2288 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]); 2289 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2290 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286); 2291 break; 2292 2293 case RT2560_RF_2525E: 2294 rt2560_rf_write(sc, RAL_RF1, 0x08808); 2295 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]); 2296 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2297 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282); 2298 break; 2299 2300 case RT2560_RF_2526: 2301 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]); 2302 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2303 rt2560_rf_write(sc, RAL_RF1, 0x08804); 2304 2305 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]); 2306 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044); 2307 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381); 2308 break; 2309 2310 /* dual-band RF */ 2311 case RT2560_RF_5222: 2312 for (i = 0; rt2560_rf5222[i].chan != chan; i++); 2313 2314 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1); 2315 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2); 2316 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040); 2317 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4); 2318 break; 2319 } 2320 2321 if (ic->ic_state != IEEE80211_S_SCAN) { 2322 /* set Japan filter bit for channel 14 */ 2323 tmp = rt2560_bbp_read(sc, 70); 2324 2325 tmp &= ~RT2560_JAPAN_FILTER; 2326 if (chan == 14) 2327 tmp |= RT2560_JAPAN_FILTER; 2328 2329 rt2560_bbp_write(sc, 70, tmp); 2330 2331 /* clear CRC errors */ 2332 RAL_READ(sc, RT2560_CNT0); 2333 } 2334} 2335 2336#if 0 2337/* 2338 * Disable RF auto-tuning. 2339 */ 2340static void 2341rt2560_disable_rf_tune(struct rt2560_softc *sc) 2342{ 2343 uint32_t tmp; 2344 2345 if (sc->rf_rev != RT2560_RF_2523) { 2346 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE; 2347 rt2560_rf_write(sc, RAL_RF1, tmp); 2348 } 2349 2350 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE; 2351 rt2560_rf_write(sc, RAL_RF3, tmp); 2352 2353 DPRINTFN(2, ("disabling RF autotune\n")); 2354} 2355#endif 2356 2357/* 2358 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF 2359 * synchronization. 2360 */ 2361static void 2362rt2560_enable_tsf_sync(struct rt2560_softc *sc) 2363{ 2364 struct ieee80211com *ic = &sc->sc_ic; 2365 uint16_t logcwmin, preload; 2366 uint32_t tmp; 2367 2368 /* first, disable TSF synchronization */ 2369 RAL_WRITE(sc, RT2560_CSR14, 0); 2370 2371 tmp = 16 * ic->ic_bss->ni_intval; 2372 RAL_WRITE(sc, RT2560_CSR12, tmp); 2373 2374 RAL_WRITE(sc, RT2560_CSR13, 0); 2375 2376 logcwmin = 5; 2377 preload = (ic->ic_opmode == IEEE80211_M_STA) ? 384 : 1024; 2378 tmp = logcwmin << 16 | preload; 2379 RAL_WRITE(sc, RT2560_BCNOCSR, tmp); 2380 2381 /* finally, enable TSF synchronization */ 2382 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN; 2383 if (ic->ic_opmode == IEEE80211_M_STA) 2384 tmp |= RT2560_ENABLE_TSF_SYNC(1); 2385 else 2386 tmp |= RT2560_ENABLE_TSF_SYNC(2) | 2387 RT2560_ENABLE_BEACON_GENERATOR; 2388 RAL_WRITE(sc, RT2560_CSR14, tmp); 2389 2390 DPRINTF(("enabling TSF synchronization\n")); 2391} 2392 2393static void 2394rt2560_update_plcp(struct rt2560_softc *sc) 2395{ 2396 struct ieee80211com *ic = &sc->sc_ic; 2397 2398 /* no short preamble for 1Mbps */ 2399 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400); 2400 2401 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) { 2402 /* values taken from the reference driver */ 2403 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401); 2404 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402); 2405 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403); 2406 } else { 2407 /* same values as above or'ed 0x8 */ 2408 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409); 2409 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a); 2410 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b); 2411 } 2412 2413 DPRINTF(("updating PLCP for %s preamble\n", 2414 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long")); 2415} 2416 2417/* 2418 * This function can be called by ieee80211_set_shortslottime(). Refer to 2419 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed. 2420 */ 2421static void 2422rt2560_update_slot(struct ifnet *ifp) 2423{ 2424 struct rt2560_softc *sc = ifp->if_softc; 2425 struct ieee80211com *ic = &sc->sc_ic; 2426 uint8_t slottime; 2427 uint16_t tx_sifs, tx_pifs, tx_difs, eifs; 2428 uint32_t tmp; 2429 2430 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20; 2431 2432 /* update the MAC slot boundaries */ 2433 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND; 2434 tx_pifs = tx_sifs + slottime; 2435 tx_difs = tx_sifs + 2 * slottime; 2436 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60; 2437 2438 tmp = RAL_READ(sc, RT2560_CSR11); 2439 tmp = (tmp & ~0x1f00) | slottime << 8; 2440 RAL_WRITE(sc, RT2560_CSR11, tmp); 2441 2442 tmp = tx_pifs << 16 | tx_sifs; 2443 RAL_WRITE(sc, RT2560_CSR18, tmp); 2444 2445 tmp = eifs << 16 | tx_difs; 2446 RAL_WRITE(sc, RT2560_CSR19, tmp); 2447 2448 DPRINTF(("setting slottime to %uus\n", slottime)); 2449} 2450 2451static void 2452rt2560_set_basicrates(struct rt2560_softc *sc) 2453{ 2454 struct ieee80211com *ic = &sc->sc_ic; 2455 2456 /* update basic rate set */ 2457 if (ic->ic_curmode == IEEE80211_MODE_11B) { 2458 /* 11b basic rates: 1, 2Mbps */ 2459 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3); 2460 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) { 2461 /* 11a basic rates: 6, 12, 24Mbps */ 2462 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150); 2463 } else { 2464 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */ 2465 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f); 2466 } 2467} 2468 2469static void 2470rt2560_update_led(struct rt2560_softc *sc, int led1, int led2) 2471{ 2472 uint32_t tmp; 2473 2474 /* set ON period to 70ms and OFF period to 30ms */ 2475 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30; 2476 RAL_WRITE(sc, RT2560_LEDCSR, tmp); 2477} 2478 2479static void 2480rt2560_set_bssid(struct rt2560_softc *sc, uint8_t *bssid) 2481{ 2482 uint32_t tmp; 2483 2484 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24; 2485 RAL_WRITE(sc, RT2560_CSR5, tmp); 2486 2487 tmp = bssid[4] | bssid[5] << 8; 2488 RAL_WRITE(sc, RT2560_CSR6, tmp); 2489 2490 DPRINTF(("setting BSSID to %6D\n", bssid, ":")); 2491} 2492 2493static void 2494rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2495{ 2496 uint32_t tmp; 2497 2498 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24; 2499 RAL_WRITE(sc, RT2560_CSR3, tmp); 2500 2501 tmp = addr[4] | addr[5] << 8; 2502 RAL_WRITE(sc, RT2560_CSR4, tmp); 2503 2504 DPRINTF(("setting MAC address to %6D\n", addr, ":")); 2505} 2506 2507static void 2508rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr) 2509{ 2510 uint32_t tmp; 2511 2512 tmp = RAL_READ(sc, RT2560_CSR3); 2513 addr[0] = tmp & 0xff; 2514 addr[1] = (tmp >> 8) & 0xff; 2515 addr[2] = (tmp >> 16) & 0xff; 2516 addr[3] = (tmp >> 24); 2517 2518 tmp = RAL_READ(sc, RT2560_CSR4); 2519 addr[4] = tmp & 0xff; 2520 addr[5] = (tmp >> 8) & 0xff; 2521} 2522 2523static void 2524rt2560_update_promisc(struct rt2560_softc *sc) 2525{ 2526 struct ifnet *ifp = sc->sc_ic.ic_ifp; 2527 uint32_t tmp; 2528 2529 tmp = RAL_READ(sc, RT2560_RXCSR0); 2530 2531 tmp &= ~RT2560_DROP_NOT_TO_ME; 2532 if (!(ifp->if_flags & IFF_PROMISC)) 2533 tmp |= RT2560_DROP_NOT_TO_ME; 2534 2535 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2536 2537 DPRINTF(("%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ? 2538 "entering" : "leaving")); 2539} 2540 2541static const char * 2542rt2560_get_rf(int rev) 2543{ 2544 switch (rev) { 2545 case RT2560_RF_2522: return "RT2522"; 2546 case RT2560_RF_2523: return "RT2523"; 2547 case RT2560_RF_2524: return "RT2524"; 2548 case RT2560_RF_2525: return "RT2525"; 2549 case RT2560_RF_2525E: return "RT2525e"; 2550 case RT2560_RF_2526: return "RT2526"; 2551 case RT2560_RF_5222: return "RT5222"; 2552 default: return "unknown"; 2553 } 2554} 2555 2556static void 2557rt2560_read_eeprom(struct rt2560_softc *sc) 2558{ 2559 uint16_t val; 2560 int i; 2561 2562 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0); 2563 sc->rf_rev = (val >> 11) & 0x7; 2564 sc->hw_radio = (val >> 10) & 0x1; 2565 sc->led_mode = (val >> 6) & 0x7; 2566 sc->rx_ant = (val >> 4) & 0x3; 2567 sc->tx_ant = (val >> 2) & 0x3; 2568 sc->nb_ant = val & 0x3; 2569 2570 /* read default values for BBP registers */ 2571 for (i = 0; i < 16; i++) { 2572 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i); 2573 sc->bbp_prom[i].reg = val >> 8; 2574 sc->bbp_prom[i].val = val & 0xff; 2575 } 2576 2577 /* read Tx power for all b/g channels */ 2578 for (i = 0; i < 14 / 2; i++) { 2579 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i); 2580 sc->txpow[i * 2] = val >> 8; 2581 sc->txpow[i * 2 + 1] = val & 0xff; 2582 } 2583} 2584 2585static int 2586rt2560_bbp_init(struct rt2560_softc *sc) 2587{ 2588#define N(a) (sizeof (a) / sizeof ((a)[0])) 2589 int i, ntries; 2590 2591 /* wait for BBP to be ready */ 2592 for (ntries = 0; ntries < 100; ntries++) { 2593 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0) 2594 break; 2595 DELAY(1); 2596 } 2597 if (ntries == 100) { 2598 device_printf(sc->sc_dev, "timeout waiting for BBP\n"); 2599 return EIO; 2600 } 2601 2602 /* initialize BBP registers to default values */ 2603 for (i = 0; i < N(rt2560_def_bbp); i++) { 2604 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg, 2605 rt2560_def_bbp[i].val); 2606 } 2607#if 0 2608 /* initialize BBP registers to values stored in EEPROM */ 2609 for (i = 0; i < 16; i++) { 2610 if (sc->bbp_prom[i].reg == 0xff) 2611 continue; 2612 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val); 2613 } 2614#endif 2615 2616 return 0; 2617#undef N 2618} 2619 2620static void 2621rt2560_set_txantenna(struct rt2560_softc *sc, int antenna) 2622{ 2623 uint32_t tmp; 2624 uint8_t tx; 2625 2626 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK; 2627 if (antenna == 1) 2628 tx |= RT2560_BBP_ANTA; 2629 else if (antenna == 2) 2630 tx |= RT2560_BBP_ANTB; 2631 else 2632 tx |= RT2560_BBP_DIVERSITY; 2633 2634 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */ 2635 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 || 2636 sc->rf_rev == RT2560_RF_5222) 2637 tx |= RT2560_BBP_FLIPIQ; 2638 2639 rt2560_bbp_write(sc, RT2560_BBP_TX, tx); 2640 2641 /* update values for CCK and OFDM in BBPCSR1 */ 2642 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007; 2643 tmp |= (tx & 0x7) << 16 | (tx & 0x7); 2644 RAL_WRITE(sc, RT2560_BBPCSR1, tmp); 2645} 2646 2647static void 2648rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna) 2649{ 2650 uint8_t rx; 2651 2652 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK; 2653 if (antenna == 1) 2654 rx |= RT2560_BBP_ANTA; 2655 else if (antenna == 2) 2656 rx |= RT2560_BBP_ANTB; 2657 else 2658 rx |= RT2560_BBP_DIVERSITY; 2659 2660 /* need to force no I/Q flip for RF 2525e and 2526 */ 2661 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526) 2662 rx &= ~RT2560_BBP_FLIPIQ; 2663 2664 rt2560_bbp_write(sc, RT2560_BBP_RX, rx); 2665} 2666 2667static void 2668rt2560_init(void *priv) 2669{ 2670#define N(a) (sizeof (a) / sizeof ((a)[0])) 2671 struct rt2560_softc *sc = priv; 2672 struct ieee80211com *ic = &sc->sc_ic; 2673 struct ifnet *ifp = ic->ic_ifp; 2674 uint32_t tmp; 2675 int i; 2676 2677 RAL_LOCK(sc); 2678 2679 rt2560_stop(sc); 2680 2681 /* setup tx rings */ 2682 tmp = RT2560_PRIO_RING_COUNT << 24 | 2683 RT2560_ATIM_RING_COUNT << 16 | 2684 RT2560_TX_RING_COUNT << 8 | 2685 RT2560_TX_DESC_SIZE; 2686 2687 /* rings must be initialized in this exact order */ 2688 RAL_WRITE(sc, RT2560_TXCSR2, tmp); 2689 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr); 2690 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr); 2691 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr); 2692 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr); 2693 2694 /* setup rx ring */ 2695 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE; 2696 2697 RAL_WRITE(sc, RT2560_RXCSR1, tmp); 2698 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr); 2699 2700 /* initialize MAC registers to default values */ 2701 for (i = 0; i < N(rt2560_def_mac); i++) 2702 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val); 2703 2704 IEEE80211_ADDR_COPY(ic->ic_myaddr, IF_LLADDR(ifp)); 2705 rt2560_set_macaddr(sc, ic->ic_myaddr); 2706 2707 /* set basic rate set (will be updated later) */ 2708 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153); 2709 2710 rt2560_set_txantenna(sc, sc->tx_ant); 2711 rt2560_set_rxantenna(sc, sc->rx_ant); 2712 rt2560_update_slot(ifp); 2713 rt2560_update_plcp(sc); 2714 rt2560_update_led(sc, 0, 0); 2715 2716 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2717 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY); 2718 2719 if (rt2560_bbp_init(sc) != 0) { 2720 rt2560_stop(sc); 2721 RAL_UNLOCK(sc); 2722 return; 2723 } 2724 2725 /* set default BSS channel */ 2726 rt2560_set_chan(sc, ic->ic_curchan); 2727 2728 /* kick Rx */ 2729 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR; 2730 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2731 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR; 2732 if (ic->ic_opmode != IEEE80211_M_HOSTAP) 2733 tmp |= RT2560_DROP_TODS; 2734 if (!(ifp->if_flags & IFF_PROMISC)) 2735 tmp |= RT2560_DROP_NOT_TO_ME; 2736 } 2737 RAL_WRITE(sc, RT2560_RXCSR0, tmp); 2738 2739 /* clear old FCS and Rx FIFO errors */ 2740 RAL_READ(sc, RT2560_CNT0); 2741 RAL_READ(sc, RT2560_CNT4); 2742 2743 /* clear any pending interrupts */ 2744 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff); 2745 2746 /* enable interrupts */ 2747 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK); 2748 2749 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 2750 ifp->if_drv_flags |= IFF_DRV_RUNNING; 2751 2752 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 2753 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 2754 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 2755 } else 2756 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 2757 2758 RAL_UNLOCK(sc); 2759#undef N 2760} 2761 2762void 2763rt2560_stop(void *priv) 2764{ 2765 struct rt2560_softc *sc = priv; 2766 struct ieee80211com *ic = &sc->sc_ic; 2767 struct ifnet *ifp = ic->ic_ifp; 2768 2769 sc->sc_tx_timer = 0; 2770 ifp->if_timer = 0; 2771 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 2772 2773 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 2774 2775 /* abort Tx */ 2776 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX); 2777 2778 /* disable Rx */ 2779 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX); 2780 2781 /* reset ASIC (imply reset BBP) */ 2782 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC); 2783 RAL_WRITE(sc, RT2560_CSR1, 0); 2784 2785 /* disable interrupts */ 2786 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff); 2787 2788 /* reset Tx and Rx rings */ 2789 rt2560_reset_tx_ring(sc, &sc->txq); 2790 rt2560_reset_tx_ring(sc, &sc->atimq); 2791 rt2560_reset_tx_ring(sc, &sc->prioq); 2792 rt2560_reset_tx_ring(sc, &sc->bcnq); 2793 rt2560_reset_rx_ring(sc, &sc->rxq); 2794} 2795 2796static int 2797rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2798 const struct ieee80211_bpf_params *params) 2799{ 2800 struct ieee80211com *ic = ni->ni_ic; 2801 struct ifnet *ifp = ic->ic_ifp; 2802 struct rt2560_softc *sc = ifp->if_softc; 2803 2804 RAL_LOCK(sc); 2805 2806 /* prevent management frames from being sent if we're not ready */ 2807 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2808 RAL_UNLOCK(sc); 2809 return ENETDOWN; 2810 } 2811 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) { 2812 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2813 RAL_UNLOCK(sc); 2814 return ENOBUFS; /* XXX */ 2815 } 2816 2817 if (bpf_peers_present(ic->ic_rawbpf)) 2818 bpf_mtap(ic->ic_rawbpf, m); 2819 2820 ifp->if_opackets++; 2821 2822 if (params == NULL) { 2823 /* 2824 * Legacy path; interpret frame contents to decide 2825 * precisely how to send the frame. 2826 */ 2827 if (rt2560_tx_mgt(sc, m, ni) != 0) 2828 goto bad; 2829 } else { 2830 /* 2831 * Caller supplied explicit parameters to use in 2832 * sending the frame. 2833 */ 2834 if (rt2560_tx_raw(sc, m, ni, params)) 2835 goto bad; 2836 } 2837 sc->sc_tx_timer = 5; 2838 ifp->if_timer = 1; 2839 2840 RAL_UNLOCK(sc); 2841 2842 return 0; 2843bad: 2844 ifp->if_oerrors++; 2845 if (ni != NULL) 2846 ieee80211_free_node(ni); 2847 RAL_UNLOCK(sc); 2848 return EIO; /* XXX */ 2849} 2850