if_wpi.c revision 1.9.2.5
1 /* $NetBSD: if_wpi.c,v 1.9.2.5 2007/09/01 12:56:47 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2006, 2007 5 * Damien Bergamini <damien.bergamini (at) 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 __KERNEL_RCSID(0, "$NetBSD: if_wpi.c,v 1.9.2.5 2007/09/01 12:56:47 ad Exp $"); 22 23 /* 24 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. 25 */ 26 27 #include "bpfilter.h" 28 29 #include <sys/param.h> 30 #include <sys/sockio.h> 31 #include <sys/sysctl.h> 32 #include <sys/mbuf.h> 33 #include <sys/kernel.h> 34 #include <sys/socket.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/conf.h> 38 #include <sys/kauth.h> 39 #include <sys/callout.h> 40 41 #include <machine/bus.h> 42 #include <machine/endian.h> 43 #include <machine/intr.h> 44 45 #include <dev/pci/pcireg.h> 46 #include <dev/pci/pcivar.h> 47 #include <dev/pci/pcidevs.h> 48 49 #if NBPFILTER > 0 50 #include <net/bpf.h> 51 #endif 52 #include <net/if.h> 53 #include <net/if_arp.h> 54 #include <net/if_dl.h> 55 #include <net/if_ether.h> 56 #include <net/if_media.h> 57 #include <net/if_types.h> 58 59 #include <net80211/ieee80211_var.h> 60 #include <net80211/ieee80211_amrr.h> 61 #include <net80211/ieee80211_radiotap.h> 62 63 #include <netinet/in.h> 64 #include <netinet/in_systm.h> 65 #include <netinet/in_var.h> 66 #include <netinet/ip.h> 67 68 #include <dev/firmload.h> 69 70 #include <dev/pci/if_wpireg.h> 71 #include <dev/pci/if_wpivar.h> 72 73 #ifdef WPI_DEBUG 74 #define DPRINTF(x) if (wpi_debug > 0) printf x 75 #define DPRINTFN(n, x) if (wpi_debug >= (n)) printf x 76 int wpi_debug = 1; 77 #else 78 #define DPRINTF(x) 79 #define DPRINTFN(n, x) 80 #endif 81 82 /* 83 * Supported rates for 802.11a/b/g modes (in 500Kbps unit). 84 */ 85 static const struct ieee80211_rateset wpi_rateset_11a = 86 { 8, { 12, 18, 24, 36, 48, 72, 96, 108 } }; 87 88 static const struct ieee80211_rateset wpi_rateset_11b = 89 { 4, { 2, 4, 11, 22 } }; 90 91 static const struct ieee80211_rateset wpi_rateset_11g = 92 { 12, { 2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108 } }; 93 94 static int wpi_match(struct device *, struct cfdata *, void *); 95 static void wpi_attach(struct device *, struct device *, void *); 96 static int wpi_detach(struct device*, int); 97 static void wpi_power(int, void *); 98 static int wpi_dma_contig_alloc(bus_dma_tag_t, struct wpi_dma_info *, 99 void **, bus_size_t, bus_size_t, int); 100 static void wpi_dma_contig_free(struct wpi_dma_info *); 101 static int wpi_alloc_shared(struct wpi_softc *); 102 static void wpi_free_shared(struct wpi_softc *); 103 static int wpi_alloc_fwmem(struct wpi_softc *); 104 static void wpi_free_fwmem(struct wpi_softc *); 105 static struct wpi_rbuf *wpi_alloc_rbuf(struct wpi_softc *); 106 static void wpi_free_rbuf(struct mbuf *, void *, size_t, void *); 107 static int wpi_alloc_rpool(struct wpi_softc *); 108 static void wpi_free_rpool(struct wpi_softc *); 109 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 110 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 111 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 112 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, int, 113 int); 114 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 115 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 116 static struct ieee80211_node * wpi_node_alloc(struct ieee80211_node_table *); 117 static void wpi_newassoc(struct ieee80211_node *, int); 118 static int wpi_media_change(struct ifnet *); 119 static int wpi_newstate(struct ieee80211com *, enum ieee80211_state, int); 120 static void wpi_mem_lock(struct wpi_softc *); 121 static void wpi_mem_unlock(struct wpi_softc *); 122 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 123 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 124 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 125 const uint32_t *, int); 126 static int wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 127 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 128 static int wpi_load_firmware(struct wpi_softc *); 129 static void wpi_calib_timeout(void *); 130 static void wpi_iter_func(void *, struct ieee80211_node *); 131 static void wpi_power_calibration(struct wpi_softc *, int); 132 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 133 struct wpi_rx_data *); 134 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 135 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 136 static void wpi_notif_intr(struct wpi_softc *); 137 static int wpi_intr(void *); 138 static void wpi_read_eeprom(struct wpi_softc *); 139 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 140 static void wpi_read_eeprom_group(struct wpi_softc *, int); 141 static uint8_t wpi_plcp_signal(int); 142 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 143 struct ieee80211_node *, int); 144 static void wpi_start(struct ifnet *); 145 static void wpi_watchdog(struct ifnet *); 146 static int wpi_ioctl(struct ifnet *, u_long, void *); 147 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 148 static int wpi_wme_update(struct ieee80211com *); 149 static int wpi_mrr_setup(struct wpi_softc *); 150 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 151 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 152 static int wpi_set_txpower(struct wpi_softc *, 153 struct ieee80211_channel *, int); 154 static int wpi_get_power_index(struct wpi_softc *, 155 struct wpi_power_group *, struct ieee80211_channel *, int); 156 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 157 static int wpi_auth(struct wpi_softc *); 158 static int wpi_scan(struct wpi_softc *, uint16_t); 159 static int wpi_config(struct wpi_softc *); 160 static void wpi_stop_master(struct wpi_softc *); 161 static int wpi_power_up(struct wpi_softc *); 162 static int wpi_reset(struct wpi_softc *); 163 static void wpi_hw_config(struct wpi_softc *); 164 static int wpi_init(struct ifnet *); 165 static void wpi_stop(struct ifnet *, int); 166 167 CFATTACH_DECL(wpi, sizeof (struct wpi_softc), wpi_match, wpi_attach, 168 wpi_detach, NULL); 169 170 static int 171 wpi_match(struct device *parent, struct cfdata *match __unused, void *aux) 172 { 173 struct pci_attach_args *pa = aux; 174 175 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) 176 return 0; 177 178 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_1 || 179 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_2) 180 return 1; 181 182 return 0; 183 } 184 185 /* Base Address Register */ 186 #define WPI_PCI_BAR0 0x10 187 188 static void 189 wpi_attach(struct device *parent __unused, struct device *self, void *aux) 190 { 191 struct wpi_softc *sc = (struct wpi_softc *)self; 192 struct ieee80211com *ic = &sc->sc_ic; 193 struct ifnet *ifp = &sc->sc_ec.ec_if; 194 struct pci_attach_args *pa = aux; 195 const char *intrstr; 196 char devinfo[256]; 197 bus_space_tag_t memt; 198 bus_space_handle_t memh; 199 pci_intr_handle_t ih; 200 pcireg_t data; 201 int error, ac, revision; 202 203 sc->sc_pct = pa->pa_pc; 204 sc->sc_pcitag = pa->pa_tag; 205 206 callout_init(&sc->calib_to, 0); 207 208 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof devinfo); 209 revision = PCI_REVISION(pa->pa_class); 210 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, revision); 211 212 /* clear device specific PCI configuration register 0x41 */ 213 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, 0x40); 214 data &= ~0x0000ff00; 215 pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); 216 217 /* enable bus-mastering */ 218 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG); 219 data |= PCI_COMMAND_MASTER_ENABLE; 220 pci_conf_write(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG, data); 221 222 /* map the register window */ 223 error = pci_mapreg_map(pa, WPI_PCI_BAR0, PCI_MAPREG_TYPE_MEM | 224 PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, &sc->sc_sz); 225 if (error != 0) { 226 aprint_error("%s: could not map memory space\n", 227 sc->sc_dev.dv_xname); 228 return; 229 } 230 231 sc->sc_st = memt; 232 sc->sc_sh = memh; 233 sc->sc_dmat = pa->pa_dmat; 234 235 if (pci_intr_map(pa, &ih) != 0) { 236 aprint_error("%s: could not map interrupt\n", 237 sc->sc_dev.dv_xname); 238 return; 239 } 240 241 intrstr = pci_intr_string(sc->sc_pct, ih); 242 sc->sc_ih = pci_intr_establish(sc->sc_pct, ih, IPL_NET, wpi_intr, sc); 243 if (sc->sc_ih == NULL) { 244 aprint_error("%s: could not establish interrupt", 245 sc->sc_dev.dv_xname); 246 if (intrstr != NULL) 247 aprint_error(" at %s", intrstr); 248 aprint_error("\n"); 249 return; 250 } 251 aprint_normal("%s: interrupting at %s\n", sc->sc_dev.dv_xname, intrstr); 252 253 if (wpi_reset(sc) != 0) { 254 aprint_error("%s: could not reset adapter\n", 255 sc->sc_dev.dv_xname); 256 return; 257 } 258 259 /* 260 * Allocate DMA memory for firmware transfers. 261 */ 262 if ((error = wpi_alloc_fwmem(sc)) != 0) { 263 aprint_error(": could not allocate firmware memory\n"); 264 return; 265 } 266 267 /* 268 * Allocate shared page and Tx/Rx rings. 269 */ 270 if ((error = wpi_alloc_shared(sc)) != 0) { 271 aprint_error("%s: could not allocate shared area\n", 272 sc->sc_dev.dv_xname); 273 goto fail1; 274 } 275 276 if ((error = wpi_alloc_rpool(sc)) != 0) { 277 aprint_error("%s: could not allocate Rx buffers\n", 278 sc->sc_dev.dv_xname); 279 goto fail2; 280 } 281 282 for (ac = 0; ac < 4; ac++) { 283 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac); 284 if (error != 0) { 285 aprint_error("%s: could not allocate Tx ring %d\n", 286 sc->sc_dev.dv_xname, ac); 287 goto fail3; 288 } 289 } 290 291 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 292 if (error != 0) { 293 aprint_error("%s: could not allocate command ring\n", 294 sc->sc_dev.dv_xname); 295 goto fail3; 296 } 297 298 error = wpi_alloc_tx_ring(sc, &sc->svcq, WPI_SVC_RING_COUNT, 5); 299 if (error != 0) { 300 aprint_error("%s: could not allocate service ring\n", 301 sc->sc_dev.dv_xname); 302 goto fail4; 303 } 304 305 if (wpi_alloc_rx_ring(sc, &sc->rxq) != 0) { 306 aprint_error("%s: could not allocate Rx ring\n", 307 sc->sc_dev.dv_xname); 308 goto fail5; 309 } 310 311 ic->ic_ifp = ifp; 312 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 313 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 314 ic->ic_state = IEEE80211_S_INIT; 315 316 /* set device capabilities */ 317 ic->ic_caps = 318 IEEE80211_C_IBSS | /* IBSS mode support */ 319 IEEE80211_C_WPA | /* 802.11i */ 320 IEEE80211_C_MONITOR | /* monitor mode supported */ 321 IEEE80211_C_TXPMGT | /* tx power management */ 322 IEEE80211_C_SHSLOT | /* short slot time supported */ 323 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 324 IEEE80211_C_WME; /* 802.11e */ 325 326 /* read supported channels and MAC address from EEPROM */ 327 wpi_read_eeprom(sc); 328 329 /* set supported .11a, .11b, .11g rates */ 330 ic->ic_sup_rates[IEEE80211_MODE_11A] = wpi_rateset_11a; 331 ic->ic_sup_rates[IEEE80211_MODE_11B] = wpi_rateset_11b; 332 ic->ic_sup_rates[IEEE80211_MODE_11G] = wpi_rateset_11g; 333 334 ic->ic_ibss_chan = &ic->ic_channels[0]; 335 336 ifp->if_softc = sc; 337 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 338 ifp->if_init = wpi_init; 339 ifp->if_stop = wpi_stop; 340 ifp->if_ioctl = wpi_ioctl; 341 ifp->if_start = wpi_start; 342 ifp->if_watchdog = wpi_watchdog; 343 IFQ_SET_READY(&ifp->if_snd); 344 memcpy(ifp->if_xname, sc->sc_dev.dv_xname, IFNAMSIZ); 345 346 if_attach(ifp); 347 ieee80211_ifattach(ic); 348 /* override default methods */ 349 ic->ic_node_alloc = wpi_node_alloc; 350 ic->ic_newassoc = wpi_newassoc; 351 ic->ic_wme.wme_update = wpi_wme_update; 352 353 /* override state transition machine */ 354 sc->sc_newstate = ic->ic_newstate; 355 ic->ic_newstate = wpi_newstate; 356 ieee80211_media_init(ic, wpi_media_change, ieee80211_media_status); 357 358 sc->amrr.amrr_min_success_threshold = 1; 359 sc->amrr.amrr_max_success_threshold = 15; 360 361 /* set powerhook */ 362 sc->powerhook = powerhook_establish(sc->sc_dev.dv_xname, wpi_power, sc); 363 364 #if NBPFILTER > 0 365 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 366 sizeof (struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN, 367 &sc->sc_drvbpf); 368 369 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 370 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 371 sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT); 372 373 sc->sc_txtap_len = sizeof sc->sc_txtapu; 374 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 375 sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT); 376 #endif 377 378 ieee80211_announce(ic); 379 380 return; 381 382 fail5: wpi_free_tx_ring(sc, &sc->svcq); 383 fail4: wpi_free_tx_ring(sc, &sc->cmdq); 384 fail3: while (--ac >= 0) 385 wpi_free_tx_ring(sc, &sc->txq[ac]); 386 wpi_free_rpool(sc); 387 fail2: wpi_free_shared(sc); 388 fail1: wpi_free_fwmem(sc); 389 } 390 391 static int 392 wpi_detach(struct device* self, int flags __unused) 393 { 394 struct wpi_softc *sc = (struct wpi_softc *)self; 395 struct ifnet *ifp = sc->sc_ic.ic_ifp; 396 int ac; 397 398 wpi_stop(ifp, 1); 399 400 #if NBPFILTER > 0 401 if (ifp != NULL) 402 bpfdetach(ifp); 403 #endif 404 ieee80211_ifdetach(&sc->sc_ic); 405 if (ifp != NULL) 406 if_detach(ifp); 407 408 for (ac = 0; ac < 4; ac++) 409 wpi_free_tx_ring(sc, &sc->txq[ac]); 410 wpi_free_tx_ring(sc, &sc->cmdq); 411 wpi_free_tx_ring(sc, &sc->svcq); 412 wpi_free_rx_ring(sc, &sc->rxq); 413 wpi_free_rpool(sc); 414 wpi_free_shared(sc); 415 416 if (sc->sc_ih != NULL) { 417 pci_intr_disestablish(sc->sc_pct, sc->sc_ih); 418 sc->sc_ih = NULL; 419 } 420 421 bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_sz); 422 423 return 0; 424 } 425 426 static void 427 wpi_power(int why, void *arg) 428 { 429 struct wpi_softc *sc = arg; 430 struct ifnet *ifp; 431 pcireg_t data; 432 int s; 433 434 if (why != PWR_RESUME) 435 return; 436 437 /* clear device specific PCI configuration register 0x41 */ 438 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, 0x40); 439 data &= ~0x0000ff00; 440 pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); 441 442 s = splnet(); 443 ifp = sc->sc_ic.ic_ifp; 444 if (ifp->if_flags & IFF_UP) { 445 ifp->if_init(ifp); 446 if (ifp->if_flags & IFF_RUNNING) 447 ifp->if_start(ifp); 448 } 449 splx(s); 450 } 451 452 static int 453 wpi_dma_contig_alloc(bus_dma_tag_t tag, struct wpi_dma_info *dma, 454 void **kvap, bus_size_t size, bus_size_t alignment, int flags) 455 { 456 int nsegs, error; 457 458 dma->tag = tag; 459 dma->size = size; 460 461 error = bus_dmamap_create(tag, size, 1, size, 0, flags, &dma->map); 462 if (error != 0) 463 goto fail; 464 465 error = bus_dmamem_alloc(tag, size, alignment, 0, &dma->seg, 1, &nsegs, 466 flags); 467 if (error != 0) 468 goto fail; 469 470 error = bus_dmamem_map(tag, &dma->seg, 1, size, &dma->vaddr, flags); 471 if (error != 0) 472 goto fail; 473 474 error = bus_dmamap_load(tag, dma->map, dma->vaddr, size, NULL, flags); 475 if (error != 0) 476 goto fail; 477 478 memset(dma->vaddr, 0, size); 479 480 dma->paddr = dma->map->dm_segs[0].ds_addr; 481 if (kvap != NULL) 482 *kvap = dma->vaddr; 483 484 return 0; 485 486 fail: wpi_dma_contig_free(dma); 487 return error; 488 } 489 490 static void 491 wpi_dma_contig_free(struct wpi_dma_info *dma) 492 { 493 if (dma->map != NULL) { 494 if (dma->vaddr != NULL) { 495 bus_dmamap_unload(dma->tag, dma->map); 496 bus_dmamem_unmap(dma->tag, dma->vaddr, dma->size); 497 bus_dmamem_free(dma->tag, &dma->seg, 1); 498 dma->vaddr = NULL; 499 } 500 bus_dmamap_destroy(dma->tag, dma->map); 501 dma->map = NULL; 502 } 503 } 504 505 /* 506 * Allocate a shared page between host and NIC. 507 */ 508 static int 509 wpi_alloc_shared(struct wpi_softc *sc) 510 { 511 int error; 512 /* must be aligned on a 4K-page boundary */ 513 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->shared_dma, 514 (void **)&sc->shared, sizeof (struct wpi_shared), 515 WPI_BUF_ALIGN,BUS_DMA_NOWAIT); 516 if (error != 0) 517 aprint_error( 518 "%s: could not allocate shared area DMA memory\n", 519 sc->sc_dev.dv_xname); 520 521 return error; 522 } 523 524 static void 525 wpi_free_shared(struct wpi_softc *sc) 526 { 527 wpi_dma_contig_free(&sc->shared_dma); 528 } 529 530 /* 531 * Allocate DMA-safe memory for firmware transfer. 532 */ 533 static int 534 wpi_alloc_fwmem(struct wpi_softc *sc) 535 { 536 int error; 537 /* allocate enough contiguous space to store text and data */ 538 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->fw_dma, NULL, 539 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 0, 540 BUS_DMA_NOWAIT); 541 542 if (error != 0) 543 aprint_error( 544 "%s: could not allocate firmware transfer area" 545 "DMA memory\n", sc->sc_dev.dv_xname); 546 return error; 547 } 548 549 static void 550 wpi_free_fwmem(struct wpi_softc *sc) 551 { 552 wpi_dma_contig_free(&sc->fw_dma); 553 } 554 555 556 static struct wpi_rbuf * 557 wpi_alloc_rbuf(struct wpi_softc *sc) 558 { 559 struct wpi_rbuf *rbuf; 560 561 rbuf = SLIST_FIRST(&sc->rxq.freelist); 562 if (rbuf == NULL) 563 return NULL; 564 SLIST_REMOVE_HEAD(&sc->rxq.freelist, next); 565 sc->rxq.nb_free_entries --; 566 567 return rbuf; 568 } 569 570 /* 571 * This is called automatically by the network stack when the mbuf to which our 572 * Rx buffer is attached is freed. 573 */ 574 static void 575 wpi_free_rbuf(struct mbuf* m, void *buf, size_t size, void *arg) 576 { 577 struct wpi_rbuf *rbuf = arg; 578 struct wpi_softc *sc = rbuf->sc; 579 580 /* put the buffer back in the free list */ 581 582 SLIST_INSERT_HEAD(&sc->rxq.freelist, rbuf, next); 583 sc->rxq.nb_free_entries ++; 584 585 if (__predict_true(m != NULL)) 586 pool_cache_put(mb_cache, m); 587 } 588 589 static int 590 wpi_alloc_rpool(struct wpi_softc *sc) 591 { 592 struct wpi_rx_ring *ring = &sc->rxq; 593 struct wpi_rbuf *rbuf; 594 int i, error; 595 596 /* allocate a big chunk of DMA'able memory.. */ 597 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->buf_dma, NULL, 598 WPI_RBUF_COUNT * WPI_RBUF_SIZE, WPI_BUF_ALIGN, BUS_DMA_NOWAIT); 599 if (error != 0) { 600 aprint_normal("%s: could not allocate Rx buffers DMA memory\n", 601 sc->sc_dev.dv_xname); 602 return error; 603 } 604 605 /* ..and split it into 3KB chunks */ 606 SLIST_INIT(&ring->freelist); 607 for (i = 0; i < WPI_RBUF_COUNT; i++) { 608 rbuf = &ring->rbuf[i]; 609 rbuf->sc = sc; /* backpointer for callbacks */ 610 rbuf->vaddr = (char *)ring->buf_dma.vaddr + i * WPI_RBUF_SIZE; 611 rbuf->paddr = ring->buf_dma.paddr + i * WPI_RBUF_SIZE; 612 613 SLIST_INSERT_HEAD(&ring->freelist, rbuf, next); 614 } 615 616 ring->nb_free_entries = WPI_RBUF_COUNT; 617 return 0; 618 } 619 620 static void 621 wpi_free_rpool(struct wpi_softc *sc) 622 { 623 wpi_dma_contig_free(&sc->rxq.buf_dma); 624 } 625 626 static int 627 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 628 { 629 struct wpi_rx_data *data; 630 struct wpi_rbuf *rbuf; 631 int i, error; 632 633 ring->cur = 0; 634 635 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 636 (void **)&ring->desc, 637 WPI_RX_RING_COUNT * sizeof (struct wpi_rx_desc), 638 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 639 if (error != 0) { 640 aprint_error("%s: could not allocate rx ring DMA memory\n", 641 sc->sc_dev.dv_xname); 642 goto fail; 643 } 644 645 /* 646 * Setup Rx buffers. 647 */ 648 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 649 data = &ring->data[i]; 650 651 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 652 if (data->m == NULL) { 653 aprint_error("%s: could not allocate rx mbuf\n", 654 sc->sc_dev.dv_xname); 655 error = ENOMEM; 656 goto fail; 657 } 658 if ((rbuf = wpi_alloc_rbuf(sc)) == NULL) { 659 m_freem(data->m); 660 data->m = NULL; 661 aprint_error("%s: could not allocate rx cluster\n", 662 sc->sc_dev.dv_xname); 663 error = ENOMEM; 664 goto fail; 665 } 666 /* attach Rx buffer to mbuf */ 667 MEXTADD(data->m, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 668 rbuf); 669 data->m->m_flags |= M_EXT_RW; 670 671 ring->desc[i] = htole32(rbuf->paddr); 672 } 673 674 return 0; 675 676 fail: wpi_free_rx_ring(sc, ring); 677 return error; 678 } 679 680 static void 681 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 682 { 683 int ntries; 684 685 wpi_mem_lock(sc); 686 687 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 688 for (ntries = 0; ntries < 100; ntries++) { 689 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 690 break; 691 DELAY(10); 692 } 693 #ifdef WPI_DEBUG 694 if (ntries == 100 && wpi_debug > 0) 695 aprint_error("%s: timeout resetting Rx ring\n", 696 sc->sc_dev.dv_xname); 697 #endif 698 wpi_mem_unlock(sc); 699 700 ring->cur = 0; 701 } 702 703 static void 704 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 705 { 706 int i; 707 708 wpi_dma_contig_free(&ring->desc_dma); 709 710 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 711 if (ring->data[i].m != NULL) 712 m_freem(ring->data[i].m); 713 } 714 } 715 716 static int 717 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 718 int qid) 719 { 720 struct wpi_tx_data *data; 721 int i, error; 722 723 ring->qid = qid; 724 ring->count = count; 725 ring->queued = 0; 726 ring->cur = 0; 727 728 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 729 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 730 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 731 if (error != 0) { 732 aprint_error("%s: could not allocate tx ring DMA memory\n", 733 sc->sc_dev.dv_xname); 734 goto fail; 735 } 736 737 /* update shared page with ring's base address */ 738 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 739 740 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->cmd_dma, 741 (void **)&ring->cmd, 742 count * sizeof (struct wpi_tx_cmd), 4, BUS_DMA_NOWAIT); 743 if (error != 0) { 744 aprint_error("%s: could not allocate tx cmd DMA memory\n", 745 sc->sc_dev.dv_xname); 746 goto fail; 747 } 748 749 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 750 M_NOWAIT); 751 if (ring->data == NULL) { 752 aprint_error("%s: could not allocate tx data slots\n", 753 sc->sc_dev.dv_xname); 754 goto fail; 755 } 756 757 memset(ring->data, 0, count * sizeof (struct wpi_tx_data)); 758 759 for (i = 0; i < count; i++) { 760 data = &ring->data[i]; 761 762 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 763 WPI_MAX_SCATTER - 1, MCLBYTES, 0, BUS_DMA_NOWAIT, 764 &data->map); 765 if (error != 0) { 766 aprint_error("%s: could not create tx buf DMA map\n", 767 sc->sc_dev.dv_xname); 768 goto fail; 769 } 770 } 771 772 return 0; 773 774 fail: wpi_free_tx_ring(sc, ring); 775 return error; 776 } 777 778 static void 779 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 780 { 781 struct wpi_tx_data *data; 782 int i, ntries; 783 784 wpi_mem_lock(sc); 785 786 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 787 for (ntries = 0; ntries < 100; ntries++) { 788 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 789 break; 790 DELAY(10); 791 } 792 #ifdef WPI_DEBUG 793 if (ntries == 100 && wpi_debug > 0) { 794 aprint_error("%s: timeout resetting Tx ring %d\n", 795 sc->sc_dev.dv_xname, ring->qid); 796 } 797 #endif 798 wpi_mem_unlock(sc); 799 800 for (i = 0; i < ring->count; i++) { 801 data = &ring->data[i]; 802 803 if (data->m != NULL) { 804 bus_dmamap_unload(sc->sc_dmat, data->map); 805 m_freem(data->m); 806 data->m = NULL; 807 } 808 } 809 810 ring->queued = 0; 811 ring->cur = 0; 812 } 813 814 static void 815 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 816 { 817 struct wpi_tx_data *data; 818 int i; 819 820 wpi_dma_contig_free(&ring->desc_dma); 821 wpi_dma_contig_free(&ring->cmd_dma); 822 823 if (ring->data != NULL) { 824 for (i = 0; i < ring->count; i++) { 825 data = &ring->data[i]; 826 827 if (data->m != NULL) { 828 bus_dmamap_unload(sc->sc_dmat, data->map); 829 m_freem(data->m); 830 } 831 } 832 free(ring->data, M_DEVBUF); 833 } 834 } 835 836 /*ARGUSED*/ 837 static struct ieee80211_node * 838 wpi_node_alloc(struct ieee80211_node_table *nt __unused) 839 { 840 struct wpi_node *wn; 841 842 wn = malloc(sizeof (struct wpi_node), M_DEVBUF, M_NOWAIT); 843 844 if (wn != NULL) 845 memset(wn, 0, sizeof (struct wpi_node)); 846 return (struct ieee80211_node *)wn; 847 } 848 849 static void 850 wpi_newassoc(struct ieee80211_node *ni, int isnew) 851 { 852 struct wpi_softc *sc = ni->ni_ic->ic_ifp->if_softc; 853 int i; 854 855 ieee80211_amrr_node_init(&sc->amrr, &((struct wpi_node *)ni)->amn); 856 857 /* set rate to some reasonable initial value */ 858 for (i = ni->ni_rates.rs_nrates - 1; 859 i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72; 860 i--); 861 ni->ni_txrate = i; 862 } 863 864 static int 865 wpi_media_change(struct ifnet *ifp) 866 { 867 int error; 868 869 error = ieee80211_media_change(ifp); 870 if (error != ENETRESET) 871 return error; 872 873 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) 874 wpi_init(ifp); 875 876 return 0; 877 } 878 879 static int 880 wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 881 { 882 struct ifnet *ifp = ic->ic_ifp; 883 struct wpi_softc *sc = ifp->if_softc; 884 struct ieee80211_node *ni; 885 int error; 886 887 callout_stop(&sc->calib_to); 888 889 switch (nstate) { 890 case IEEE80211_S_SCAN: 891 ieee80211_node_table_reset(&ic->ic_scan); 892 ic->ic_flags |= IEEE80211_F_SCAN | IEEE80211_F_ASCAN; 893 894 /* make the link LED blink while we're scanning */ 895 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 896 897 if ((error = wpi_scan(sc, IEEE80211_CHAN_G)) != 0) { 898 aprint_error("%s: could not initiate scan\n", 899 sc->sc_dev.dv_xname); 900 ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 901 return error; 902 } 903 904 ic->ic_state = nstate; 905 return 0; 906 907 case IEEE80211_S_ASSOC: 908 if (ic->ic_state != IEEE80211_S_RUN) 909 break; 910 /* FALLTHROUGH */ 911 case IEEE80211_S_AUTH: 912 sc->config.associd = 0; 913 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 914 if ((error = wpi_auth(sc)) != 0) { 915 aprint_error("%s: could not send authentication request\n", 916 sc->sc_dev.dv_xname); 917 return error; 918 } 919 break; 920 921 case IEEE80211_S_RUN: 922 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 923 /* link LED blinks while monitoring */ 924 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 925 break; 926 } 927 928 ni = ic->ic_bss; 929 930 if (ic->ic_opmode != IEEE80211_M_STA) { 931 (void) wpi_auth(sc); /* XXX */ 932 wpi_setup_beacon(sc, ni); 933 } 934 935 wpi_enable_tsf(sc, ni); 936 937 /* update adapter's configuration */ 938 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 939 /* short preamble/slot time are negotiated when associating */ 940 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 941 WPI_CONFIG_SHSLOT); 942 if (ic->ic_flags & IEEE80211_F_SHSLOT) 943 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 944 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 945 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 946 sc->config.filter |= htole32(WPI_FILTER_BSS); 947 if (ic->ic_opmode != IEEE80211_M_STA) 948 sc->config.filter |= htole32(WPI_FILTER_BEACON); 949 950 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 951 952 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 953 sc->config.flags)); 954 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 955 sizeof (struct wpi_config), 1); 956 if (error != 0) { 957 aprint_error("%s: could not update configuration\n", 958 sc->sc_dev.dv_xname); 959 return error; 960 } 961 962 /* configuration has changed, set Tx power accordingly */ 963 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 964 aprint_error("%s: could not set Tx power\n", 965 sc->sc_dev.dv_xname); 966 return error; 967 } 968 969 if (ic->ic_opmode == IEEE80211_M_STA) { 970 /* fake a join to init the tx rate */ 971 wpi_newassoc(ni, 1); 972 } 973 974 /* start periodic calibration timer */ 975 sc->calib_cnt = 0; 976 callout_reset(&sc->calib_to, hz/2, wpi_calib_timeout, sc); 977 978 /* link LED always on while associated */ 979 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 980 break; 981 982 case IEEE80211_S_INIT: 983 break; 984 } 985 986 return sc->sc_newstate(ic, nstate, arg); 987 } 988 989 /* 990 * Grab exclusive access to NIC memory. 991 */ 992 static void 993 wpi_mem_lock(struct wpi_softc *sc) 994 { 995 uint32_t tmp; 996 int ntries; 997 998 tmp = WPI_READ(sc, WPI_GPIO_CTL); 999 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1000 1001 /* spin until we actually get the lock */ 1002 for (ntries = 0; ntries < 1000; ntries++) { 1003 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1004 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1005 break; 1006 DELAY(10); 1007 } 1008 if (ntries == 1000) 1009 aprint_error("%s: could not lock memory\n", sc->sc_dev.dv_xname); 1010 } 1011 1012 /* 1013 * Release lock on NIC memory. 1014 */ 1015 static void 1016 wpi_mem_unlock(struct wpi_softc *sc) 1017 { 1018 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1019 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1020 } 1021 1022 static uint32_t 1023 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1024 { 1025 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1026 return WPI_READ(sc, WPI_READ_MEM_DATA); 1027 } 1028 1029 static void 1030 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1031 { 1032 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1033 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1034 } 1035 1036 static void 1037 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1038 const uint32_t *data, int wlen) 1039 { 1040 for (; wlen > 0; wlen--, data++, addr += 4) 1041 wpi_mem_write(sc, addr, *data); 1042 } 1043 1044 1045 /* 1046 * Read `len' bytes from the EEPROM. We access the EEPROM through the MAC 1047 * instead of using the traditional bit-bang method. 1048 */ 1049 static int 1050 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1051 { 1052 uint8_t *out = data; 1053 uint32_t val; 1054 int ntries; 1055 1056 wpi_mem_lock(sc); 1057 for (; len > 0; len -= 2, addr++) { 1058 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1059 1060 for (ntries = 0; ntries < 10; ntries++) { 1061 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & 1062 WPI_EEPROM_READY) 1063 break; 1064 DELAY(5); 1065 } 1066 if (ntries == 10) { 1067 aprint_error("%s: could not read EEPROM\n", 1068 sc->sc_dev.dv_xname); 1069 return ETIMEDOUT; 1070 } 1071 *out++ = val >> 16; 1072 if (len > 1) 1073 *out++ = val >> 24; 1074 } 1075 wpi_mem_unlock(sc); 1076 1077 return 0; 1078 } 1079 1080 /* 1081 * The firmware boot code is small and is intended to be copied directly into 1082 * the NIC internal memory. 1083 */ 1084 int 1085 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *ucode, int size) 1086 { 1087 int ntries; 1088 1089 size /= sizeof (uint32_t); 1090 1091 wpi_mem_lock(sc); 1092 1093 /* copy microcode image into NIC memory */ 1094 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1095 (const uint32_t *)ucode, size); 1096 1097 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1098 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1099 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1100 1101 /* run microcode */ 1102 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1103 1104 /* wait for transfer to complete */ 1105 for (ntries = 0; ntries < 1000; ntries++) { 1106 if (!(wpi_mem_read(sc, WPI_MEM_UCODE_CTL) & WPI_UC_RUN)) 1107 break; 1108 DELAY(10); 1109 } 1110 if (ntries == 1000) { 1111 wpi_mem_unlock(sc); 1112 printf("%s: could not load boot firmware\n", 1113 sc->sc_dev.dv_xname); 1114 return ETIMEDOUT; 1115 } 1116 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1117 1118 wpi_mem_unlock(sc); 1119 1120 return 0; 1121 } 1122 1123 static int 1124 wpi_load_firmware(struct wpi_softc *sc) 1125 { 1126 struct wpi_dma_info *dma = &sc->fw_dma; 1127 struct wpi_firmware_hdr hdr; 1128 const uint8_t *init_text, *init_data, *main_text, *main_data; 1129 const uint8_t *boot_text; 1130 uint32_t init_textsz, init_datasz, main_textsz, main_datasz; 1131 uint32_t boot_textsz; 1132 firmware_handle_t fw; 1133 u_char *dfw; 1134 size_t size; 1135 int error; 1136 1137 /* load firmware image from disk */ 1138 if ((error = firmware_open("if_wpi","iwlwifi-3945.ucode", &fw) != 0)) { 1139 aprint_error("%s: could not read firmware file\n", 1140 sc->sc_dev.dv_xname); 1141 goto fail1; 1142 } 1143 1144 size = firmware_get_size(fw); 1145 1146 /* extract firmware header information */ 1147 if (size < sizeof (struct wpi_firmware_hdr)) { 1148 aprint_error("%s: truncated firmware header: %zu bytes\n", 1149 sc->sc_dev.dv_xname, size); 1150 error = EINVAL; 1151 goto fail2; 1152 } 1153 1154 if ((error = firmware_read(fw, 0, &hdr, 1155 sizeof (struct wpi_firmware_hdr))) != 0) { 1156 aprint_error("%s: can't get firmware header\n", 1157 sc->sc_dev.dv_xname); 1158 goto fail2; 1159 } 1160 1161 main_textsz = le32toh(hdr.main_textsz); 1162 main_datasz = le32toh(hdr.main_datasz); 1163 init_textsz = le32toh(hdr.init_textsz); 1164 init_datasz = le32toh(hdr.init_datasz); 1165 boot_textsz = le32toh(hdr.boot_textsz); 1166 1167 /* sanity-check firmware segments sizes */ 1168 if (main_textsz > WPI_FW_MAIN_TEXT_MAXSZ || 1169 main_datasz > WPI_FW_MAIN_DATA_MAXSZ || 1170 init_textsz > WPI_FW_INIT_TEXT_MAXSZ || 1171 init_datasz > WPI_FW_INIT_DATA_MAXSZ || 1172 boot_textsz > WPI_FW_BOOT_TEXT_MAXSZ || 1173 (boot_textsz & 3) != 0) { 1174 printf("%s: invalid firmware header\n", sc->sc_dev.dv_xname); 1175 error = EINVAL; 1176 goto fail2; 1177 } 1178 1179 /* check that all firmware segments are present */ 1180 if (size < sizeof (struct wpi_firmware_hdr) + main_textsz + 1181 main_datasz + init_textsz + init_datasz + boot_textsz) { 1182 aprint_error("%s: firmware file too short: %zu bytes\n", 1183 sc->sc_dev.dv_xname, size); 1184 error = EINVAL; 1185 goto fail2; 1186 } 1187 1188 dfw = firmware_malloc(size); 1189 if (dfw == NULL) { 1190 aprint_error("%s: not enough memory to stock firmware\n", 1191 sc->sc_dev.dv_xname); 1192 error = ENOMEM; 1193 goto fail2; 1194 } 1195 1196 if ((error = firmware_read(fw, 0, dfw, size)) != 0) { 1197 aprint_error("%s: can't get firmware\n", 1198 sc->sc_dev.dv_xname); 1199 goto fail2; 1200 } 1201 1202 /* get pointers to firmware segments */ 1203 main_text = dfw + sizeof (struct wpi_firmware_hdr); 1204 main_data = main_text + main_textsz; 1205 init_text = main_data + main_datasz; 1206 init_data = init_text + init_textsz; 1207 boot_text = init_data + init_datasz; 1208 1209 /* copy initialization images into pre-allocated DMA-safe memory */ 1210 memcpy(dma->vaddr, init_data, init_datasz); 1211 memcpy((char*)dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, init_text, init_textsz); 1212 1213 /* tell adapter where to find initialization images */ 1214 wpi_mem_lock(sc); 1215 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1216 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, init_datasz); 1217 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1218 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 1219 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, init_textsz); 1220 wpi_mem_unlock(sc); 1221 1222 /* load firmware boot code */ 1223 if ((error = wpi_load_microcode(sc, boot_text, boot_textsz)) != 0) { 1224 printf("%s: could not load boot firmware\n", 1225 sc->sc_dev.dv_xname); 1226 goto fail3; 1227 } 1228 1229 /* now press "execute" ;-) */ 1230 WPI_WRITE(sc, WPI_RESET, 0); 1231 1232 /* ..and wait at most one second for adapter to initialize */ 1233 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1234 /* this isn't what was supposed to happen.. */ 1235 aprint_error("%s: timeout waiting for adapter to initialize\n", 1236 sc->sc_dev.dv_xname); 1237 } 1238 1239 /* copy runtime images into pre-allocated DMA-safe memory */ 1240 memcpy(dma->vaddr, main_data, main_datasz); 1241 memcpy((char*)dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, main_text, main_textsz); 1242 1243 /* tell adapter where to find runtime images */ 1244 wpi_mem_lock(sc); 1245 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1246 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, main_datasz); 1247 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1248 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 1249 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | main_textsz); 1250 wpi_mem_unlock(sc); 1251 1252 /* wait at most one second for second alive notification */ 1253 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1254 /* this isn't what was supposed to happen.. */ 1255 printf("%s: timeout waiting for adapter to initialize\n", 1256 sc->sc_dev.dv_xname); 1257 } 1258 1259 1260 fail3: firmware_free(dfw,size); 1261 fail2: firmware_close(fw); 1262 fail1: return error; 1263 } 1264 1265 static void 1266 wpi_calib_timeout(void *arg) 1267 { 1268 struct wpi_softc *sc = arg; 1269 struct ieee80211com *ic = &sc->sc_ic; 1270 int temp, s; 1271 1272 /* automatic rate control triggered every 500ms */ 1273 if (ic->ic_fixed_rate == -1) { 1274 s = splnet(); 1275 if (ic->ic_opmode == IEEE80211_M_STA) 1276 wpi_iter_func(sc, ic->ic_bss); 1277 else 1278 ieee80211_iterate_nodes(&ic->ic_sta, wpi_iter_func, sc); 1279 splx(s); 1280 } 1281 1282 /* update sensor data */ 1283 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 1284 1285 /* automatic power calibration every 60s */ 1286 if (++sc->calib_cnt >= 120) { 1287 wpi_power_calibration(sc, temp); 1288 sc->calib_cnt = 0; 1289 } 1290 1291 callout_reset(&sc->calib_to, hz/2, wpi_calib_timeout, sc); 1292 } 1293 1294 static void 1295 wpi_iter_func(void *arg, struct ieee80211_node *ni) 1296 { 1297 struct wpi_softc *sc = arg; 1298 struct wpi_node *wn = (struct wpi_node *)ni; 1299 1300 ieee80211_amrr_choose(&sc->amrr, ni, &wn->amn); 1301 } 1302 1303 /* 1304 * This function is called periodically (every 60 seconds) to adjust output 1305 * power to temperature changes. 1306 */ 1307 void 1308 wpi_power_calibration(struct wpi_softc *sc, int temp) 1309 { 1310 /* sanity-check read value */ 1311 if (temp < -260 || temp > 25) { 1312 /* this can't be correct, ignore */ 1313 DPRINTF(("out-of-range temperature reported: %d\n", temp)); 1314 return; 1315 } 1316 1317 DPRINTF(("temperature %d->%d\n", sc->temp, temp)); 1318 1319 /* adjust Tx power if need be */ 1320 if (abs(temp - sc->temp) <= 6) 1321 return; 1322 1323 sc->temp = temp; 1324 1325 if (wpi_set_txpower(sc, sc->sc_ic.ic_bss->ni_chan, 1) != 0) { 1326 /* just warn, too bad for the automatic calibration... */ 1327 aprint_error("%s: could not adjust Tx power\n", 1328 sc->sc_dev.dv_xname); 1329 } 1330 } 1331 1332 static void 1333 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1334 struct wpi_rx_data *data) 1335 { 1336 struct ieee80211com *ic = &sc->sc_ic; 1337 struct ifnet *ifp = ic->ic_ifp; 1338 struct wpi_rx_ring *ring = &sc->rxq; 1339 struct wpi_rx_stat *stat; 1340 struct wpi_rx_head *head; 1341 struct wpi_rx_tail *tail; 1342 struct wpi_rbuf *rbuf; 1343 struct ieee80211_frame *wh; 1344 struct ieee80211_node *ni; 1345 struct mbuf *m, *mnew; 1346 int data_off ; 1347 1348 stat = (struct wpi_rx_stat *)(desc + 1); 1349 1350 if (stat->len > WPI_STAT_MAXLEN) { 1351 aprint_error("%s: invalid rx statistic header\n", 1352 sc->sc_dev.dv_xname); 1353 ifp->if_ierrors++; 1354 return; 1355 } 1356 1357 head = (struct wpi_rx_head *)((char *)(stat + 1) + stat->len); 1358 tail = (struct wpi_rx_tail *)((char *)(head + 1) + le16toh(head->len)); 1359 1360 DPRINTFN(4, ("rx intr: idx=%d len=%d stat len=%d rssi=%d rate=%x " 1361 "chan=%d tstamp=%" PRId64 "\n", ring->cur, le32toh(desc->len), 1362 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1363 le64toh(tail->tstamp))); 1364 1365 /* 1366 * Discard Rx frames with bad CRC early (XXX we may want to pass them 1367 * to radiotap in monitor mode). 1368 */ 1369 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1370 DPRINTF(("rx tail flags error %x\n", le32toh(tail->flags))); 1371 ifp->if_ierrors++; 1372 return; 1373 } 1374 1375 /* Compute where are the useful datas */ 1376 data_off = (char*)(head + 1) - mtod(data->m, char*); 1377 1378 /* 1379 * If the number of free entry is too low 1380 * just dup the data->m socket and reuse the same rbuf entry 1381 */ 1382 if (sc->rxq.nb_free_entries <= WPI_RBUF_LOW_LIMIT) { 1383 1384 /* Prepare the mbuf for the m_dup */ 1385 data->m->m_pkthdr.len = data->m->m_len = le16toh(head->len); 1386 data->m->m_data = (char*) data->m->m_data + data_off; 1387 1388 m = m_dup(data->m,0,M_COPYALL,M_DONTWAIT); 1389 1390 /* Restore the m_data pointer for future use */ 1391 data->m->m_data = (char*) data->m->m_data - data_off; 1392 1393 if (m == NULL) { 1394 ifp->if_ierrors++; 1395 return; 1396 } 1397 } else { 1398 1399 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1400 if (mnew == NULL) { 1401 ifp->if_ierrors++; 1402 return; 1403 } 1404 1405 rbuf = wpi_alloc_rbuf(sc); 1406 KASSERT(rbuf != NULL); 1407 1408 /* attach Rx buffer to mbuf */ 1409 MEXTADD(mnew, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 1410 rbuf); 1411 mnew->m_flags |= M_EXT_RW; 1412 1413 m = data->m; 1414 data->m = mnew; 1415 1416 /* update Rx descriptor */ 1417 ring->desc[ring->cur] = htole32(rbuf->paddr); 1418 1419 m->m_data = (char*)m->m_data + data_off; 1420 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1421 } 1422 1423 /* finalize mbuf */ 1424 m->m_pkthdr.rcvif = ifp; 1425 1426 #if NBPFILTER > 0 1427 if (sc->sc_drvbpf != NULL) { 1428 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1429 1430 tap->wr_flags = 0; 1431 tap->wr_chan_freq = 1432 htole16(ic->ic_channels[head->chan].ic_freq); 1433 tap->wr_chan_flags = 1434 htole16(ic->ic_channels[head->chan].ic_flags); 1435 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1436 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1437 tap->wr_tsft = tail->tstamp; 1438 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1439 switch (head->rate) { 1440 /* CCK rates */ 1441 case 10: tap->wr_rate = 2; break; 1442 case 20: tap->wr_rate = 4; break; 1443 case 55: tap->wr_rate = 11; break; 1444 case 110: tap->wr_rate = 22; break; 1445 /* OFDM rates */ 1446 case 0xd: tap->wr_rate = 12; break; 1447 case 0xf: tap->wr_rate = 18; break; 1448 case 0x5: tap->wr_rate = 24; break; 1449 case 0x7: tap->wr_rate = 36; break; 1450 case 0x9: tap->wr_rate = 48; break; 1451 case 0xb: tap->wr_rate = 72; break; 1452 case 0x1: tap->wr_rate = 96; break; 1453 case 0x3: tap->wr_rate = 108; break; 1454 /* unknown rate: should not happen */ 1455 default: tap->wr_rate = 0; 1456 } 1457 if (le16toh(head->flags) & 0x4) 1458 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1459 1460 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1461 } 1462 #endif 1463 1464 /* grab a reference to the source node */ 1465 wh = mtod(m, struct ieee80211_frame *); 1466 ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh); 1467 1468 /* send the frame to the 802.11 layer */ 1469 ieee80211_input(ic, m, ni, stat->rssi, 0); 1470 1471 /* release node reference */ 1472 ieee80211_free_node(ni); 1473 } 1474 1475 static void 1476 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1477 { 1478 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1479 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1480 struct wpi_tx_data *txdata = &ring->data[desc->idx]; 1481 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1482 struct wpi_node *wn = (struct wpi_node *)txdata->ni; 1483 1484 DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x " 1485 "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries, 1486 stat->nkill, stat->rate, le32toh(stat->duration), 1487 le32toh(stat->status))); 1488 1489 /* 1490 * Update rate control statistics for the node. 1491 * XXX we should not count mgmt frames since they're always sent at 1492 * the lowest available bit-rate. 1493 */ 1494 wn->amn.amn_txcnt++; 1495 if (stat->ntries > 0) { 1496 DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries)); 1497 wn->amn.amn_retrycnt++; 1498 } 1499 1500 if ((le32toh(stat->status) & 0xff) != 1) 1501 ifp->if_oerrors++; 1502 else 1503 ifp->if_opackets++; 1504 1505 bus_dmamap_unload(sc->sc_dmat, txdata->map); 1506 m_freem(txdata->m); 1507 txdata->m = NULL; 1508 ieee80211_free_node(txdata->ni); 1509 txdata->ni = NULL; 1510 1511 ring->queued--; 1512 1513 sc->sc_tx_timer = 0; 1514 ifp->if_flags &= ~IFF_OACTIVE; 1515 wpi_start(ifp); 1516 } 1517 1518 static void 1519 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1520 { 1521 struct wpi_tx_ring *ring = &sc->cmdq; 1522 struct wpi_tx_data *data; 1523 1524 if ((desc->qid & 7) != 4) 1525 return; /* not a command ack */ 1526 1527 data = &ring->data[desc->idx]; 1528 1529 /* if the command was mapped in a mbuf, free it */ 1530 if (data->m != NULL) { 1531 bus_dmamap_unload(sc->sc_dmat, data->map); 1532 m_freem(data->m); 1533 data->m = NULL; 1534 } 1535 1536 wakeup(&ring->cmd[desc->idx]); 1537 } 1538 1539 static void 1540 wpi_notif_intr(struct wpi_softc *sc) 1541 { 1542 struct ieee80211com *ic = &sc->sc_ic; 1543 struct ifnet *ifp = ic->ic_ifp; 1544 struct wpi_rx_desc *desc; 1545 struct wpi_rx_data *data; 1546 uint32_t hw; 1547 1548 hw = le32toh(sc->shared->next); 1549 while (sc->rxq.cur != hw) { 1550 data = &sc->rxq.data[sc->rxq.cur]; 1551 1552 desc = mtod(data->m, struct wpi_rx_desc *); 1553 1554 DPRINTFN(4, ("rx notification qid=%x idx=%d flags=%x type=%d " 1555 "len=%d\n", desc->qid, desc->idx, desc->flags, 1556 desc->type, le32toh(desc->len))); 1557 1558 if (!(desc->qid & 0x80)) /* reply to a command */ 1559 wpi_cmd_intr(sc, desc); 1560 1561 switch (desc->type) { 1562 case WPI_RX_DONE: 1563 /* a 802.11 frame was received */ 1564 wpi_rx_intr(sc, desc, data); 1565 break; 1566 1567 case WPI_TX_DONE: 1568 /* a 802.11 frame has been transmitted */ 1569 wpi_tx_intr(sc, desc); 1570 break; 1571 1572 case WPI_UC_READY: 1573 { 1574 struct wpi_ucode_info *uc = 1575 (struct wpi_ucode_info *)(desc + 1); 1576 1577 /* the microcontroller is ready */ 1578 DPRINTF(("microcode alive notification version %x " 1579 "alive %x\n", le32toh(uc->version), 1580 le32toh(uc->valid))); 1581 1582 if (le32toh(uc->valid) != 1) { 1583 aprint_error("%s: microcontroller " 1584 "initialization failed\n", 1585 sc->sc_dev.dv_xname); 1586 } 1587 break; 1588 } 1589 case WPI_STATE_CHANGED: 1590 { 1591 uint32_t *status = (uint32_t *)(desc + 1); 1592 1593 /* enabled/disabled notification */ 1594 DPRINTF(("state changed to %x\n", le32toh(*status))); 1595 1596 if (le32toh(*status) & 1) { 1597 /* the radio button has to be pushed */ 1598 aprint_error("%s: Radio transmitter is off\n", 1599 sc->sc_dev.dv_xname); 1600 /* turn the interface down */ 1601 ifp->if_flags &= ~IFF_UP; 1602 wpi_stop(ifp, 1); 1603 return; /* no further processing */ 1604 } 1605 break; 1606 } 1607 case WPI_START_SCAN: 1608 { 1609 struct wpi_start_scan *scan = 1610 (struct wpi_start_scan *)(desc + 1); 1611 1612 DPRINTFN(2, ("scanning channel %d status %x\n", 1613 scan->chan, le32toh(scan->status))); 1614 1615 /* fix current channel */ 1616 ic->ic_bss->ni_chan = &ic->ic_channels[scan->chan]; 1617 break; 1618 } 1619 case WPI_STOP_SCAN: 1620 { 1621 struct wpi_stop_scan *scan = 1622 (struct wpi_stop_scan *)(desc + 1); 1623 1624 DPRINTF(("scan finished nchan=%d status=%d chan=%d\n", 1625 scan->nchan, scan->status, scan->chan)); 1626 1627 if (scan->status == 1 && scan->chan <= 14) { 1628 /* 1629 * We just finished scanning 802.11g channels, 1630 * start scanning 802.11a ones. 1631 */ 1632 if (wpi_scan(sc, IEEE80211_CHAN_A) == 0) 1633 break; 1634 } 1635 ieee80211_end_scan(ic); 1636 break; 1637 } 1638 } 1639 1640 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1641 } 1642 1643 /* tell the firmware what we have processed */ 1644 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1645 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1646 } 1647 1648 static int 1649 wpi_intr(void *arg) 1650 { 1651 struct wpi_softc *sc = arg; 1652 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1653 uint32_t r; 1654 1655 r = WPI_READ(sc, WPI_INTR); 1656 if (r == 0 || r == 0xffffffff) 1657 return 0; /* not for us */ 1658 1659 DPRINTFN(5, ("interrupt reg %x\n", r)); 1660 1661 /* disable interrupts */ 1662 WPI_WRITE(sc, WPI_MASK, 0); 1663 /* ack interrupts */ 1664 WPI_WRITE(sc, WPI_INTR, r); 1665 1666 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1667 aprint_error("%s: fatal firmware error\n", sc->sc_dev.dv_xname); 1668 sc->sc_ic.ic_ifp->if_flags &= ~IFF_UP; 1669 wpi_stop(sc->sc_ic.ic_ifp, 1); 1670 return 1; 1671 } 1672 1673 if (r & WPI_RX_INTR) 1674 wpi_notif_intr(sc); 1675 1676 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1677 wakeup(sc); 1678 1679 /* re-enable interrupts */ 1680 if (ifp->if_flags & IFF_UP) 1681 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1682 1683 return 1; 1684 } 1685 1686 static uint8_t 1687 wpi_plcp_signal(int rate) 1688 { 1689 switch (rate) { 1690 /* CCK rates (returned values are device-dependent) */ 1691 case 2: return 10; 1692 case 4: return 20; 1693 case 11: return 55; 1694 case 22: return 110; 1695 1696 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1697 /* R1-R4, (u)ral is R4-R1 */ 1698 case 12: return 0xd; 1699 case 18: return 0xf; 1700 case 24: return 0x5; 1701 case 36: return 0x7; 1702 case 48: return 0x9; 1703 case 72: return 0xb; 1704 case 96: return 0x1; 1705 case 108: return 0x3; 1706 1707 /* unsupported rates (should not get there) */ 1708 default: return 0; 1709 } 1710 } 1711 1712 /* quickly determine if a given rate is CCK or OFDM */ 1713 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1714 1715 static int 1716 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1717 int ac) 1718 { 1719 struct ieee80211com *ic = &sc->sc_ic; 1720 struct wpi_tx_ring *ring = &sc->txq[ac]; 1721 struct wpi_tx_desc *desc; 1722 struct wpi_tx_data *data; 1723 struct wpi_tx_cmd *cmd; 1724 struct wpi_cmd_data *tx; 1725 struct ieee80211_frame *wh; 1726 struct ieee80211_key *k; 1727 const struct chanAccParams *cap; 1728 struct mbuf *mnew; 1729 int i, error, rate, hdrlen, noack = 0; 1730 1731 desc = &ring->desc[ring->cur]; 1732 data = &ring->data[ring->cur]; 1733 1734 wh = mtod(m0, struct ieee80211_frame *); 1735 1736 if (IEEE80211_QOS_HAS_SEQ(wh)) { 1737 hdrlen = sizeof (struct ieee80211_qosframe); 1738 cap = &ic->ic_wme.wme_chanParams; 1739 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1740 } else 1741 hdrlen = sizeof (struct ieee80211_frame); 1742 1743 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1744 k = ieee80211_crypto_encap(ic, ni, m0); 1745 if (k == NULL) { 1746 m_freem(m0); 1747 return ENOBUFS; 1748 } 1749 1750 /* packet header may have moved, reset our local pointer */ 1751 wh = mtod(m0, struct ieee80211_frame *); 1752 } 1753 1754 /* pickup a rate */ 1755 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1756 IEEE80211_FC0_TYPE_MGT) { 1757 /* mgmt frames are sent at the lowest available bit-rate */ 1758 rate = ni->ni_rates.rs_rates[0]; 1759 } else { 1760 if (ic->ic_fixed_rate != -1) { 1761 rate = ic->ic_sup_rates[ic->ic_curmode]. 1762 rs_rates[ic->ic_fixed_rate]; 1763 } else 1764 rate = ni->ni_rates.rs_rates[ni->ni_txrate]; 1765 } 1766 rate &= IEEE80211_RATE_VAL; 1767 1768 1769 #if NBPFILTER > 0 1770 if (sc->sc_drvbpf != NULL) { 1771 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1772 1773 tap->wt_flags = 0; 1774 tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); 1775 tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); 1776 tap->wt_rate = rate; 1777 tap->wt_hwqueue = ac; 1778 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1779 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1780 1781 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1782 } 1783 #endif 1784 1785 cmd = &ring->cmd[ring->cur]; 1786 cmd->code = WPI_CMD_TX_DATA; 1787 cmd->flags = 0; 1788 cmd->qid = ring->qid; 1789 cmd->idx = ring->cur; 1790 1791 tx = (struct wpi_cmd_data *)cmd->data; 1792 tx->flags = 0; 1793 1794 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1795 tx->flags |= htole32(WPI_TX_NEED_ACK); 1796 } else if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > ic->ic_rtsthreshold) 1797 tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); 1798 1799 tx->flags |= htole32(WPI_TX_AUTO_SEQ); 1800 1801 /* retrieve destination node's id */ 1802 tx->id = IEEE80211_IS_MULTICAST(wh->i_addr1) ? WPI_ID_BROADCAST : 1803 WPI_ID_BSS; 1804 1805 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1806 IEEE80211_FC0_TYPE_MGT) { 1807 /* tell h/w to set timestamp in probe responses */ 1808 if ((wh->i_fc[0] & 1809 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1810 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1811 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1812 1813 if (((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1814 IEEE80211_FC0_SUBTYPE_ASSOC_REQ) || 1815 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1816 IEEE80211_FC0_SUBTYPE_REASSOC_REQ)) 1817 tx->timeout = htole16(3); 1818 else 1819 tx->timeout = htole16(2); 1820 } else 1821 tx->timeout = htole16(0); 1822 1823 tx->rate = wpi_plcp_signal(rate); 1824 1825 /* be very persistant at sending frames out */ 1826 tx->rts_ntries = 7; 1827 tx->data_ntries = 15; 1828 1829 tx->ofdm_mask = 0xff; 1830 tx->cck_mask = 0xf; 1831 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1832 1833 tx->len = htole16(m0->m_pkthdr.len); 1834 1835 /* save and trim IEEE802.11 header */ 1836 m_copydata(m0, 0, hdrlen, (void *)&tx->wh); 1837 m_adj(m0, hdrlen); 1838 1839 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 1840 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1841 if (error != 0 && error != EFBIG) { 1842 aprint_error("%s: could not map mbuf (error %d)\n", 1843 sc->sc_dev.dv_xname, error); 1844 m_freem(m0); 1845 return error; 1846 } 1847 if (error != 0) { 1848 /* too many fragments, linearize */ 1849 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1850 if (mnew == NULL) { 1851 m_freem(m0); 1852 return ENOMEM; 1853 } 1854 1855 M_COPY_PKTHDR(mnew, m0); 1856 if (m0->m_pkthdr.len > MHLEN) { 1857 MCLGET(mnew, M_DONTWAIT); 1858 if (!(mnew->m_flags & M_EXT)) { 1859 m_freem(m0); 1860 m_freem(mnew); 1861 return ENOMEM; 1862 } 1863 } 1864 1865 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, void *)); 1866 m_freem(m0); 1867 mnew->m_len = mnew->m_pkthdr.len; 1868 m0 = mnew; 1869 1870 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 1871 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1872 if (error != 0) { 1873 aprint_error("%s: could not map mbuf (error %d)\n", 1874 sc->sc_dev.dv_xname, error); 1875 m_freem(m0); 1876 return error; 1877 } 1878 } 1879 1880 data->m = m0; 1881 data->ni = ni; 1882 1883 DPRINTFN(4, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1884 ring->qid, ring->cur, m0->m_pkthdr.len, data->map->dm_nsegs)); 1885 1886 /* first scatter/gather segment is used by the tx data command */ 1887 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1888 (1 + data->map->dm_nsegs) << 24); 1889 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 1890 ring->cur * sizeof (struct wpi_tx_cmd)); 1891 /*XXX The next line might be wrong. I don't use hdrlen*/ 1892 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); 1893 1894 for (i = 1; i <= data->map->dm_nsegs; i++) { 1895 desc->segs[i].addr = 1896 htole32(data->map->dm_segs[i - 1].ds_addr); 1897 desc->segs[i].len = 1898 htole32(data->map->dm_segs[i - 1].ds_len); 1899 } 1900 1901 ring->queued++; 1902 1903 /* kick ring */ 1904 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 1905 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 1906 1907 return 0; 1908 } 1909 1910 static void 1911 wpi_start(struct ifnet *ifp) 1912 { 1913 struct wpi_softc *sc = ifp->if_softc; 1914 struct ieee80211com *ic = &sc->sc_ic; 1915 struct ieee80211_node *ni; 1916 struct ether_header *eh; 1917 struct mbuf *m0; 1918 int ac; 1919 1920 /* 1921 * net80211 may still try to send management frames even if the 1922 * IFF_RUNNING flag is not set... 1923 */ 1924 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 1925 return; 1926 1927 for (;;) { 1928 IF_POLL(&ic->ic_mgtq, m0); 1929 if (m0 != NULL) { 1930 IF_DEQUEUE(&ic->ic_mgtq, m0); 1931 1932 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1933 m0->m_pkthdr.rcvif = NULL; 1934 1935 /* management frames go into ring 0 */ 1936 if (sc->txq[0].queued > sc->txq[0].count - 8) { 1937 ifp->if_oerrors++; 1938 continue; 1939 } 1940 #if NBPFILTER > 0 1941 if (ic->ic_rawbpf != NULL) 1942 bpf_mtap(ic->ic_rawbpf, m0); 1943 #endif 1944 if (wpi_tx_data(sc, m0, ni, 0) != 0) { 1945 ifp->if_oerrors++; 1946 break; 1947 } 1948 } else { 1949 if (ic->ic_state != IEEE80211_S_RUN) 1950 break; 1951 IFQ_POLL(&ifp->if_snd, m0); 1952 if (m0 == NULL) 1953 break; 1954 1955 if (m0->m_len < sizeof (*eh) && 1956 (m0 = m_pullup(m0, sizeof (*eh))) != NULL) { 1957 ifp->if_oerrors++; 1958 continue; 1959 } 1960 eh = mtod(m0, struct ether_header *); 1961 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1962 if (ni == NULL) { 1963 m_freem(m0); 1964 ifp->if_oerrors++; 1965 continue; 1966 } 1967 1968 /* classify mbuf so we can find which tx ring to use */ 1969 if (ieee80211_classify(ic, m0, ni) != 0) { 1970 m_freem(m0); 1971 ieee80211_free_node(ni); 1972 ifp->if_oerrors++; 1973 continue; 1974 } 1975 1976 /* no QoS encapsulation for EAPOL frames */ 1977 ac = (eh->ether_type != htons(ETHERTYPE_PAE)) ? 1978 M_WME_GETAC(m0) : WME_AC_BE; 1979 1980 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 1981 /* there is no place left in this ring */ 1982 ifp->if_flags |= IFF_OACTIVE; 1983 break; 1984 } 1985 IFQ_DEQUEUE(&ifp->if_snd, m0); 1986 #if NBPFILTER > 0 1987 if (ifp->if_bpf != NULL) 1988 bpf_mtap(ifp->if_bpf, m0); 1989 #endif 1990 m0 = ieee80211_encap(ic, m0, ni); 1991 if (m0 == NULL) { 1992 ieee80211_free_node(ni); 1993 ifp->if_oerrors++; 1994 continue; 1995 } 1996 #if NBPFILTER > 0 1997 if (ic->ic_rawbpf != NULL) 1998 bpf_mtap(ic->ic_rawbpf, m0); 1999 #endif 2000 if (wpi_tx_data(sc, m0, ni, ac) != 0) { 2001 ieee80211_free_node(ni); 2002 ifp->if_oerrors++; 2003 break; 2004 } 2005 } 2006 2007 sc->sc_tx_timer = 5; 2008 ifp->if_timer = 1; 2009 } 2010 } 2011 2012 static void 2013 wpi_watchdog(struct ifnet *ifp) 2014 { 2015 struct wpi_softc *sc = ifp->if_softc; 2016 2017 ifp->if_timer = 0; 2018 2019 if (sc->sc_tx_timer > 0) { 2020 if (--sc->sc_tx_timer == 0) { 2021 aprint_error("%s: device timeout\n", 2022 sc->sc_dev.dv_xname); 2023 ifp->if_oerrors++; 2024 ifp->if_flags &= ~IFF_UP; 2025 wpi_stop(ifp, 1); 2026 return; 2027 } 2028 ifp->if_timer = 1; 2029 } 2030 2031 ieee80211_watchdog(&sc->sc_ic); 2032 } 2033 2034 static int 2035 wpi_ioctl(struct ifnet *ifp, u_long cmd, void *data) 2036 { 2037 #define IS_RUNNING(ifp) \ 2038 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 2039 2040 struct wpi_softc *sc = ifp->if_softc; 2041 struct ieee80211com *ic = &sc->sc_ic; 2042 struct ifreq *ifr = (struct ifreq *)data; 2043 int s, error = 0; 2044 2045 s = splnet(); 2046 2047 switch (cmd) { 2048 case SIOCSIFFLAGS: 2049 if (ifp->if_flags & IFF_UP) { 2050 if (!(ifp->if_flags & IFF_RUNNING)) 2051 wpi_init(ifp); 2052 } else { 2053 if (ifp->if_flags & IFF_RUNNING) 2054 wpi_stop(ifp, 1); 2055 } 2056 break; 2057 2058 case SIOCADDMULTI: 2059 case SIOCDELMULTI: 2060 error = (cmd == SIOCADDMULTI) ? 2061 ether_addmulti(ifr, &sc->sc_ec) : 2062 ether_delmulti(ifr, &sc->sc_ec); 2063 if (error == ENETRESET) { 2064 /* setup multicast filter, etc */ 2065 error = 0; 2066 } 2067 break; 2068 2069 default: 2070 error = ieee80211_ioctl(ic, cmd, data); 2071 } 2072 2073 if (error == ENETRESET) { 2074 if (IS_RUNNING(ifp) && 2075 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2076 wpi_init(ifp); 2077 error = 0; 2078 } 2079 2080 splx(s); 2081 return error; 2082 2083 #undef IS_RUNNING 2084 } 2085 2086 /* 2087 * Extract various information from EEPROM. 2088 */ 2089 static void 2090 wpi_read_eeprom(struct wpi_softc *sc) 2091 { 2092 struct ieee80211com *ic = &sc->sc_ic; 2093 char domain[4]; 2094 int i; 2095 2096 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap, 1); 2097 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev, 2); 2098 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2099 2100 DPRINTF(("cap=%x rev=%x type=%x\n", sc->cap, le16toh(sc->rev), 2101 sc->type)); 2102 2103 /* read and print regulatory domain */ 2104 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, domain, 4); 2105 aprint_normal(", %.4s", domain); 2106 2107 /* read and print MAC address */ 2108 wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6); 2109 aprint_normal(", address %s\n", ether_sprintf(ic->ic_myaddr)); 2110 2111 /* read the list of authorized channels */ 2112 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2113 wpi_read_eeprom_channels(sc, i); 2114 2115 /* read the list of power groups */ 2116 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2117 wpi_read_eeprom_group(sc, i); 2118 } 2119 2120 static void 2121 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 2122 { 2123 struct ieee80211com *ic = &sc->sc_ic; 2124 const struct wpi_chan_band *band = &wpi_bands[n]; 2125 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 2126 int chan, i; 2127 2128 wpi_read_prom_data(sc, band->addr, channels, 2129 band->nchan * sizeof (struct wpi_eeprom_chan)); 2130 2131 for (i = 0; i < band->nchan; i++) { 2132 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) 2133 continue; 2134 2135 chan = band->chan[i]; 2136 2137 if (n == 0) { /* 2GHz band */ 2138 ic->ic_channels[chan].ic_freq = 2139 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ); 2140 ic->ic_channels[chan].ic_flags = 2141 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 2142 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 2143 2144 } else { /* 5GHz band */ 2145 /* 2146 * Some 3945abg adapters support channels 7, 8, 11 2147 * and 12 in the 2GHz *and* 5GHz bands. 2148 * Because of limitations in our net80211(9) stack, 2149 * we can't support these channels in 5GHz band. 2150 */ 2151 if (chan <= 14) 2152 continue; 2153 2154 ic->ic_channels[chan].ic_freq = 2155 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ); 2156 ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A; 2157 } 2158 2159 /* is active scan allowed on this channel? */ 2160 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 2161 ic->ic_channels[chan].ic_flags |= 2162 IEEE80211_CHAN_PASSIVE; 2163 } 2164 2165 /* save maximum allowed power for this channel */ 2166 sc->maxpwr[chan] = channels[i].maxpwr; 2167 2168 DPRINTF(("adding chan %d flags=0x%x maxpwr=%d\n", 2169 chan, channels[i].flags, sc->maxpwr[chan])); 2170 } 2171 } 2172 2173 static void 2174 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 2175 { 2176 struct wpi_power_group *group = &sc->groups[n]; 2177 struct wpi_eeprom_group rgroup; 2178 int i; 2179 2180 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 2181 sizeof rgroup); 2182 2183 /* save power group information */ 2184 group->chan = rgroup.chan; 2185 group->maxpwr = rgroup.maxpwr; 2186 /* temperature at which the samples were taken */ 2187 group->temp = (int16_t)le16toh(rgroup.temp); 2188 2189 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 2190 group->chan, group->maxpwr, group->temp)); 2191 2192 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 2193 group->samples[i].index = rgroup.samples[i].index; 2194 group->samples[i].power = rgroup.samples[i].power; 2195 2196 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 2197 group->samples[i].index, group->samples[i].power)); 2198 } 2199 } 2200 2201 /* 2202 * Send a command to the firmware. 2203 */ 2204 static int 2205 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2206 { 2207 struct wpi_tx_ring *ring = &sc->cmdq; 2208 struct wpi_tx_desc *desc; 2209 struct wpi_tx_cmd *cmd; 2210 2211 KASSERT(size <= sizeof cmd->data); 2212 2213 desc = &ring->desc[ring->cur]; 2214 cmd = &ring->cmd[ring->cur]; 2215 2216 cmd->code = code; 2217 cmd->flags = 0; 2218 cmd->qid = ring->qid; 2219 cmd->idx = ring->cur; 2220 memcpy(cmd->data, buf, size); 2221 2222 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2223 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2224 ring->cur * sizeof (struct wpi_tx_cmd)); 2225 desc->segs[0].len = htole32(4 + size); 2226 2227 /* kick cmd ring */ 2228 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2229 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2230 2231 return async ? 0 : tsleep(cmd, PCATCH, "wpicmd", hz); 2232 } 2233 2234 static int 2235 wpi_wme_update(struct ieee80211com *ic) 2236 { 2237 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2238 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2239 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2240 const struct wmeParams *wmep; 2241 struct wpi_wme_setup wme; 2242 int ac; 2243 2244 /* don't override default WME values if WME is not actually enabled */ 2245 if (!(ic->ic_flags & IEEE80211_F_WME)) 2246 return 0; 2247 2248 wme.flags = 0; 2249 for (ac = 0; ac < WME_NUM_AC; ac++) { 2250 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2251 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2252 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2253 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2254 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2255 2256 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2257 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2258 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2259 } 2260 2261 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2262 #undef WPI_USEC 2263 #undef WPI_EXP2 2264 } 2265 2266 /* 2267 * Configure h/w multi-rate retries. 2268 */ 2269 static int 2270 wpi_mrr_setup(struct wpi_softc *sc) 2271 { 2272 struct ieee80211com *ic = &sc->sc_ic; 2273 struct wpi_mrr_setup mrr; 2274 int i, error; 2275 2276 /* CCK rates (not used with 802.11a) */ 2277 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2278 mrr.rates[i].flags = 0; 2279 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2280 /* fallback to the immediate lower CCK rate (if any) */ 2281 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2282 /* try one time at this rate before falling back to "next" */ 2283 mrr.rates[i].ntries = 1; 2284 } 2285 2286 /* OFDM rates (not used with 802.11b) */ 2287 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2288 mrr.rates[i].flags = 0; 2289 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2290 /* fallback to the immediate lower rate (if any) */ 2291 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2292 mrr.rates[i].next = (i == WPI_OFDM6) ? 2293 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2294 WPI_OFDM6 : WPI_CCK2) : 2295 i - 1; 2296 /* try one time at this rate before falling back to "next" */ 2297 mrr.rates[i].ntries = 1; 2298 } 2299 2300 /* setup MRR for control frames */ 2301 mrr.which = htole32(WPI_MRR_CTL); 2302 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2303 if (error != 0) { 2304 aprint_error("%s: could not setup MRR for control frames\n", 2305 sc->sc_dev.dv_xname); 2306 return error; 2307 } 2308 2309 /* setup MRR for data frames */ 2310 mrr.which = htole32(WPI_MRR_DATA); 2311 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2312 if (error != 0) { 2313 aprint_error("%s: could not setup MRR for data frames\n", 2314 sc->sc_dev.dv_xname); 2315 return error; 2316 } 2317 2318 return 0; 2319 } 2320 2321 static void 2322 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2323 { 2324 struct wpi_cmd_led led; 2325 2326 led.which = which; 2327 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2328 led.off = off; 2329 led.on = on; 2330 2331 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2332 } 2333 2334 static void 2335 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2336 { 2337 struct wpi_cmd_tsf tsf; 2338 uint64_t val, mod; 2339 2340 memset(&tsf, 0, sizeof tsf); 2341 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8); 2342 tsf.bintval = htole16(ni->ni_intval); 2343 tsf.lintval = htole16(10); 2344 2345 /* compute remaining time until next beacon */ 2346 val = (uint64_t)ni->ni_intval * 1024; /* msecs -> usecs */ 2347 mod = le64toh(tsf.tstamp) % val; 2348 tsf.binitval = htole32((uint32_t)(val - mod)); 2349 2350 DPRINTF(("TSF bintval=%u tstamp=%" PRId64 ", init=%u\n", 2351 ni->ni_intval, le64toh(tsf.tstamp), (uint32_t)(val - mod))); 2352 2353 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2354 aprint_error("%s: could not enable TSF\n", sc->sc_dev.dv_xname); 2355 } 2356 2357 /* 2358 * Update Tx power to match what is defined for channel `c'. 2359 */ 2360 static int 2361 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 2362 { 2363 struct ieee80211com *ic = &sc->sc_ic; 2364 struct wpi_power_group *group; 2365 struct wpi_cmd_txpower txpower; 2366 u_int chan; 2367 int i; 2368 2369 /* get channel number */ 2370 chan = ieee80211_chan2ieee(ic, c); 2371 2372 /* find the power group to which this channel belongs */ 2373 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2374 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 2375 if (chan <= group->chan) 2376 break; 2377 } else 2378 group = &sc->groups[0]; 2379 2380 memset(&txpower, 0, sizeof txpower); 2381 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 2382 txpower.chan = htole16(chan); 2383 2384 /* set Tx power for all OFDM and CCK rates */ 2385 for (i = 0; i <= 11 ; i++) { 2386 /* retrieve Tx power for this channel/rate combination */ 2387 int idx = wpi_get_power_index(sc, group, c, 2388 wpi_ridx_to_rate[i]); 2389 2390 txpower.rates[i].plcp = wpi_ridx_to_plcp[i]; 2391 2392 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2393 txpower.rates[i].rf_gain = wpi_rf_gain_5ghz[idx]; 2394 txpower.rates[i].dsp_gain = wpi_dsp_gain_5ghz[idx]; 2395 } else { 2396 txpower.rates[i].rf_gain = wpi_rf_gain_2ghz[idx]; 2397 txpower.rates[i].dsp_gain = wpi_dsp_gain_2ghz[idx]; 2398 } 2399 DPRINTF(("chan %d/rate %d: power index %d\n", chan, 2400 wpi_ridx_to_rate[i], idx)); 2401 } 2402 2403 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 2404 } 2405 2406 /* 2407 * Determine Tx power index for a given channel/rate combination. 2408 * This takes into account the regulatory information from EEPROM and the 2409 * current temperature. 2410 */ 2411 static int 2412 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 2413 struct ieee80211_channel *c, int rate) 2414 { 2415 /* fixed-point arithmetic division using a n-bit fractional part */ 2416 #define fdivround(a, b, n) \ 2417 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 2418 2419 /* linear interpolation */ 2420 #define interpolate(x, x1, y1, x2, y2, n) \ 2421 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 2422 2423 struct ieee80211com *ic = &sc->sc_ic; 2424 struct wpi_power_sample *sample; 2425 int pwr, idx; 2426 u_int chan; 2427 2428 /* get channel number */ 2429 chan = ieee80211_chan2ieee(ic, c); 2430 2431 /* default power is group's maximum power - 3dB */ 2432 pwr = group->maxpwr / 2; 2433 2434 /* decrease power for highest OFDM rates to reduce distortion */ 2435 switch (rate) { 2436 case 72: /* 36Mb/s */ 2437 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 2438 break; 2439 case 96: /* 48Mb/s */ 2440 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 2441 break; 2442 case 108: /* 54Mb/s */ 2443 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 2444 break; 2445 } 2446 2447 /* never exceed channel's maximum allowed Tx power */ 2448 pwr = min(pwr, sc->maxpwr[chan]); 2449 2450 /* retrieve power index into gain tables from samples */ 2451 for (sample = group->samples; sample < &group->samples[3]; sample++) 2452 if (pwr > sample[1].power) 2453 break; 2454 /* fixed-point linear interpolation using a 19-bit fractional part */ 2455 idx = interpolate(pwr, sample[0].power, sample[0].index, 2456 sample[1].power, sample[1].index, 19); 2457 2458 /* 2459 * Adjust power index based on current temperature: 2460 * - if cooler than factory-calibrated: decrease output power 2461 * - if warmer than factory-calibrated: increase output power 2462 */ 2463 idx -= (sc->temp - group->temp) * 11 / 100; 2464 2465 /* decrease power for CCK rates (-5dB) */ 2466 if (!WPI_RATE_IS_OFDM(rate)) 2467 idx += 10; 2468 2469 /* keep power index in a valid range */ 2470 if (idx < 0) 2471 return 0; 2472 if (idx > WPI_MAX_PWR_INDEX) 2473 return WPI_MAX_PWR_INDEX; 2474 return idx; 2475 2476 #undef interpolate 2477 #undef fdivround 2478 } 2479 2480 /* 2481 * Build a beacon frame that the firmware will broadcast periodically in 2482 * IBSS or HostAP modes. 2483 */ 2484 static int 2485 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2486 { 2487 struct ieee80211com *ic = &sc->sc_ic; 2488 struct wpi_tx_ring *ring = &sc->cmdq; 2489 struct wpi_tx_desc *desc; 2490 struct wpi_tx_data *data; 2491 struct wpi_tx_cmd *cmd; 2492 struct wpi_cmd_beacon *bcn; 2493 struct ieee80211_beacon_offsets bo; 2494 struct mbuf *m0; 2495 int error; 2496 2497 desc = &ring->desc[ring->cur]; 2498 data = &ring->data[ring->cur]; 2499 2500 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2501 if (m0 == NULL) { 2502 aprint_error("%s: could not allocate beacon frame\n", 2503 sc->sc_dev.dv_xname); 2504 return ENOMEM; 2505 } 2506 2507 cmd = &ring->cmd[ring->cur]; 2508 cmd->code = WPI_CMD_SET_BEACON; 2509 cmd->flags = 0; 2510 cmd->qid = ring->qid; 2511 cmd->idx = ring->cur; 2512 2513 bcn = (struct wpi_cmd_beacon *)cmd->data; 2514 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2515 bcn->id = WPI_ID_BROADCAST; 2516 bcn->ofdm_mask = 0xff; 2517 bcn->cck_mask = 0x0f; 2518 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2519 bcn->len = htole16(m0->m_pkthdr.len); 2520 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2521 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2522 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2523 2524 /* save and trim IEEE802.11 header */ 2525 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (void *)&bcn->wh); 2526 m_adj(m0, sizeof (struct ieee80211_frame)); 2527 2528 /* assume beacon frame is contiguous */ 2529 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 2530 BUS_DMA_READ | BUS_DMA_NOWAIT); 2531 if (error) { 2532 aprint_error("%s: could not map beacon\n", sc->sc_dev.dv_xname); 2533 m_freem(m0); 2534 return error; 2535 } 2536 2537 data->m = m0; 2538 2539 /* first scatter/gather segment is used by the beacon command */ 2540 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2541 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2542 ring->cur * sizeof (struct wpi_tx_cmd)); 2543 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2544 desc->segs[1].addr = htole32(data->map->dm_segs[0].ds_addr); 2545 desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len); 2546 2547 /* kick cmd ring */ 2548 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2549 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2550 2551 return 0; 2552 } 2553 2554 static int 2555 wpi_auth(struct wpi_softc *sc) 2556 { 2557 struct ieee80211com *ic = &sc->sc_ic; 2558 struct ieee80211_node *ni = ic->ic_bss; 2559 struct wpi_node_info node; 2560 int error; 2561 2562 /* update adapter's configuration */ 2563 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2564 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2565 sc->config.flags = htole32(WPI_CONFIG_TSF); 2566 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2567 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2568 WPI_CONFIG_24GHZ); 2569 } 2570 switch (ic->ic_curmode) { 2571 case IEEE80211_MODE_11A: 2572 sc->config.cck_mask = 0; 2573 sc->config.ofdm_mask = 0x15; 2574 break; 2575 case IEEE80211_MODE_11B: 2576 sc->config.cck_mask = 0x03; 2577 sc->config.ofdm_mask = 0; 2578 break; 2579 default: /* assume 802.11b/g */ 2580 sc->config.cck_mask = 0x0f; 2581 sc->config.ofdm_mask = 0x15; 2582 } 2583 2584 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2585 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2586 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2587 sizeof (struct wpi_config), 1); 2588 if (error != 0) { 2589 aprint_error("%s: could not configure\n", sc->sc_dev.dv_xname); 2590 return error; 2591 } 2592 2593 /* configuration has changed, set Tx power accordingly */ 2594 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2595 aprint_error("%s: could not set Tx power\n", sc->sc_dev.dv_xname); 2596 return error; 2597 } 2598 2599 /* add default node */ 2600 memset(&node, 0, sizeof node); 2601 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2602 node.id = WPI_ID_BSS; 2603 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2604 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2605 node.action = htole32(WPI_ACTION_SET_RATE); 2606 node.antenna = WPI_ANTENNA_BOTH; 2607 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2608 if (error != 0) { 2609 aprint_error("%s: could not add BSS node\n", sc->sc_dev.dv_xname); 2610 return error; 2611 } 2612 2613 return 0; 2614 } 2615 2616 /* 2617 * Send a scan request to the firmware. Since this command is huge, we map it 2618 * into a mbuf instead of using the pre-allocated set of commands. 2619 */ 2620 static int 2621 wpi_scan(struct wpi_softc *sc, uint16_t flags) 2622 { 2623 struct ieee80211com *ic = &sc->sc_ic; 2624 struct wpi_tx_ring *ring = &sc->cmdq; 2625 struct wpi_tx_desc *desc; 2626 struct wpi_tx_data *data; 2627 struct wpi_tx_cmd *cmd; 2628 struct wpi_scan_hdr *hdr; 2629 struct wpi_scan_chan *chan; 2630 struct ieee80211_frame *wh; 2631 struct ieee80211_rateset *rs; 2632 struct ieee80211_channel *c; 2633 enum ieee80211_phymode mode; 2634 uint8_t *frm; 2635 int nrates, pktlen, error; 2636 2637 desc = &ring->desc[ring->cur]; 2638 data = &ring->data[ring->cur]; 2639 2640 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 2641 if (data->m == NULL) { 2642 aprint_error("%s: could not allocate mbuf for scan command\n", 2643 sc->sc_dev.dv_xname); 2644 return ENOMEM; 2645 } 2646 2647 MCLGET(data->m, M_DONTWAIT); 2648 if (!(data->m->m_flags & M_EXT)) { 2649 m_freem(data->m); 2650 data->m = NULL; 2651 aprint_error("%s: could not allocate mbuf for scan command\n", 2652 sc->sc_dev.dv_xname); 2653 return ENOMEM; 2654 } 2655 2656 cmd = mtod(data->m, struct wpi_tx_cmd *); 2657 cmd->code = WPI_CMD_SCAN; 2658 cmd->flags = 0; 2659 cmd->qid = ring->qid; 2660 cmd->idx = ring->cur; 2661 2662 hdr = (struct wpi_scan_hdr *)cmd->data; 2663 memset(hdr, 0, sizeof (struct wpi_scan_hdr)); 2664 hdr->txflags = htole32(WPI_TX_AUTO_SEQ); 2665 hdr->id = WPI_ID_BROADCAST; 2666 hdr->lifetime = htole32(WPI_LIFETIME_INFINITE); 2667 2668 /* 2669 * Move to the next channel if no packets are received within 5 msecs 2670 * after sending the probe request (this helps to reduce the duration 2671 * of active scans). 2672 */ 2673 hdr->quiet = htole16(5); /* timeout in milliseconds */ 2674 hdr->plcp_threshold = htole16(1); /* min # of packets */ 2675 2676 if (flags & IEEE80211_CHAN_A) { 2677 hdr->crc_threshold = htole16(1); 2678 /* send probe requests at 6Mbps */ 2679 hdr->rate = wpi_plcp_signal(12); 2680 } else { 2681 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2682 /* send probe requests at 1Mbps */ 2683 hdr->rate = wpi_plcp_signal(2); 2684 } 2685 2686 /* for directed scans, firmware inserts the essid IE itself */ 2687 hdr->essid[0].id = IEEE80211_ELEMID_SSID; 2688 hdr->essid[0].len = ic->ic_des_esslen; 2689 memcpy(hdr->essid[0].data, ic->ic_des_essid, ic->ic_des_esslen); 2690 2691 /* 2692 * Build a probe request frame. Most of the following code is a 2693 * copy & paste of what is done in net80211. 2694 */ 2695 wh = (struct ieee80211_frame *)(hdr + 1); 2696 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2697 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2698 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2699 IEEE80211_ADDR_COPY(wh->i_addr1, etherbroadcastaddr); 2700 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 2701 IEEE80211_ADDR_COPY(wh->i_addr3, etherbroadcastaddr); 2702 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2703 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2704 2705 frm = (uint8_t *)(wh + 1); 2706 2707 /* add empty essid IE (firmware generates it for directed scans) */ 2708 *frm++ = IEEE80211_ELEMID_SSID; 2709 *frm++ = 0; 2710 2711 mode = ieee80211_chan2mode(ic, ic->ic_ibss_chan); 2712 rs = &ic->ic_sup_rates[mode]; 2713 2714 /* add supported rates IE */ 2715 *frm++ = IEEE80211_ELEMID_RATES; 2716 nrates = rs->rs_nrates; 2717 if (nrates > IEEE80211_RATE_SIZE) 2718 nrates = IEEE80211_RATE_SIZE; 2719 *frm++ = nrates; 2720 memcpy(frm, rs->rs_rates, nrates); 2721 frm += nrates; 2722 2723 /* add supported xrates IE */ 2724 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2725 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2726 *frm++ = IEEE80211_ELEMID_XRATES; 2727 *frm++ = nrates; 2728 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2729 frm += nrates; 2730 } 2731 2732 /* setup length of probe request */ 2733 hdr->paylen = htole16(frm - (uint8_t *)wh); 2734 2735 chan = (struct wpi_scan_chan *)frm; 2736 for (c = &ic->ic_channels[1]; 2737 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2738 if ((c->ic_flags & flags) != flags) 2739 continue; 2740 2741 chan->chan = ieee80211_chan2ieee(ic, c); 2742 chan->flags = 0; 2743 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2744 chan->flags |= WPI_CHAN_ACTIVE; 2745 if (ic->ic_des_esslen != 0) 2746 chan->flags |= WPI_CHAN_DIRECT; 2747 } 2748 chan->dsp_gain = 0x6e; 2749 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2750 chan->rf_gain = 0x3b; 2751 chan->active = htole16(10); 2752 chan->passive = htole16(110); 2753 } else { 2754 chan->rf_gain = 0x28; 2755 chan->active = htole16(20); 2756 chan->passive = htole16(120); 2757 } 2758 hdr->nchan++; 2759 chan++; 2760 2761 frm += sizeof (struct wpi_scan_chan); 2762 } 2763 hdr->len = htole16(frm - (uint8_t *)hdr); 2764 pktlen = frm - (uint8_t *)cmd; 2765 2766 error = bus_dmamap_load(sc->sc_dmat, data->map, cmd, pktlen, 2767 NULL, BUS_DMA_NOWAIT); 2768 if (error) { 2769 aprint_error("%s: could not map scan command\n", 2770 sc->sc_dev.dv_xname); 2771 m_freem(data->m); 2772 data->m = NULL; 2773 return error; 2774 } 2775 2776 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2777 desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr); 2778 desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); 2779 2780 /* kick cmd ring */ 2781 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2782 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2783 2784 return 0; /* will be notified async. of failure/success */ 2785 } 2786 2787 static int 2788 wpi_config(struct wpi_softc *sc) 2789 { 2790 struct ieee80211com *ic = &sc->sc_ic; 2791 struct ifnet *ifp = ic->ic_ifp; 2792 struct wpi_power power; 2793 struct wpi_bluetooth bluetooth; 2794 struct wpi_node_info node; 2795 int error; 2796 2797 memset(&power, 0, sizeof power); 2798 power.flags = htole32(WPI_POWER_CAM | 0x8); 2799 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2800 if (error != 0) { 2801 aprint_error("%s: could not set power mode\n", 2802 sc->sc_dev.dv_xname); 2803 return error; 2804 } 2805 2806 /* configure bluetooth coexistence */ 2807 memset(&bluetooth, 0, sizeof bluetooth); 2808 bluetooth.flags = 3; 2809 bluetooth.lead = 0xaa; 2810 bluetooth.kill = 1; 2811 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2812 0); 2813 if (error != 0) { 2814 aprint_error( 2815 "%s: could not configure bluetooth coexistence\n", 2816 sc->sc_dev.dv_xname); 2817 return error; 2818 } 2819 2820 /* configure adapter */ 2821 memset(&sc->config, 0, sizeof (struct wpi_config)); 2822 IEEE80211_ADDR_COPY(ic->ic_myaddr, LLADDR(ifp->if_sadl)); 2823 IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); 2824 /*set default channel*/ 2825 sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_ibss_chan); 2826 sc->config.flags = htole32(WPI_CONFIG_TSF); 2827 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_ibss_chan)) { 2828 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2829 WPI_CONFIG_24GHZ); 2830 } 2831 sc->config.filter = 0; 2832 switch (ic->ic_opmode) { 2833 case IEEE80211_M_STA: 2834 sc->config.mode = WPI_MODE_STA; 2835 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2836 break; 2837 case IEEE80211_M_IBSS: 2838 case IEEE80211_M_AHDEMO: 2839 sc->config.mode = WPI_MODE_IBSS; 2840 break; 2841 case IEEE80211_M_HOSTAP: 2842 sc->config.mode = WPI_MODE_HOSTAP; 2843 break; 2844 case IEEE80211_M_MONITOR: 2845 sc->config.mode = WPI_MODE_MONITOR; 2846 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2847 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2848 break; 2849 } 2850 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2851 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2852 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2853 sizeof (struct wpi_config), 0); 2854 if (error != 0) { 2855 aprint_error("%s: configure command failed\n", 2856 sc->sc_dev.dv_xname); 2857 return error; 2858 } 2859 2860 /* configuration has changed, set Tx power accordingly */ 2861 if ((error = wpi_set_txpower(sc, ic->ic_ibss_chan, 0)) != 0) { 2862 aprint_error("%s: could not set Tx power\n", sc->sc_dev.dv_xname); 2863 return error; 2864 } 2865 2866 /* add broadcast node */ 2867 memset(&node, 0, sizeof node); 2868 IEEE80211_ADDR_COPY(node.bssid, etherbroadcastaddr); 2869 node.id = WPI_ID_BROADCAST; 2870 node.rate = wpi_plcp_signal(2); 2871 node.action = htole32(WPI_ACTION_SET_RATE); 2872 node.antenna = WPI_ANTENNA_BOTH; 2873 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2874 if (error != 0) { 2875 aprint_error("%s: could not add broadcast node\n", 2876 sc->sc_dev.dv_xname); 2877 return error; 2878 } 2879 2880 if ((error = wpi_mrr_setup(sc)) != 0) { 2881 aprint_error("%s: could not setup MRR\n", sc->sc_dev.dv_xname); 2882 return error; 2883 } 2884 2885 return 0; 2886 } 2887 2888 static void 2889 wpi_stop_master(struct wpi_softc *sc) 2890 { 2891 uint32_t tmp; 2892 int ntries; 2893 2894 tmp = WPI_READ(sc, WPI_RESET); 2895 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER); 2896 2897 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2898 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2899 return; /* already asleep */ 2900 2901 for (ntries = 0; ntries < 100; ntries++) { 2902 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2903 break; 2904 DELAY(10); 2905 } 2906 if (ntries == 100) { 2907 aprint_error("%s: timeout waiting for master\n", 2908 sc->sc_dev.dv_xname); 2909 } 2910 } 2911 2912 static int 2913 wpi_power_up(struct wpi_softc *sc) 2914 { 2915 uint32_t tmp; 2916 int ntries; 2917 2918 wpi_mem_lock(sc); 2919 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2920 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2921 wpi_mem_unlock(sc); 2922 2923 for (ntries = 0; ntries < 5000; ntries++) { 2924 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 2925 break; 2926 DELAY(10); 2927 } 2928 if (ntries == 5000) { 2929 aprint_error("%s: timeout waiting for NIC to power up\n", 2930 sc->sc_dev.dv_xname); 2931 return ETIMEDOUT; 2932 } 2933 return 0; 2934 } 2935 2936 static int 2937 wpi_reset(struct wpi_softc *sc) 2938 { 2939 uint32_t tmp; 2940 int ntries; 2941 2942 /* clear any pending interrupts */ 2943 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 2944 2945 tmp = WPI_READ(sc, WPI_PLL_CTL); 2946 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 2947 2948 tmp = WPI_READ(sc, WPI_CHICKEN); 2949 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 2950 2951 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2952 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 2953 2954 /* wait for clock stabilization */ 2955 for (ntries = 0; ntries < 1000; ntries++) { 2956 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 2957 break; 2958 DELAY(10); 2959 } 2960 if (ntries == 1000) { 2961 aprint_error("%s: timeout waiting for clock stabilization\n", 2962 sc->sc_dev.dv_xname); 2963 return ETIMEDOUT; 2964 } 2965 2966 /* initialize EEPROM */ 2967 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 2968 if ((tmp & WPI_EEPROM_VERSION) == 0) { 2969 aprint_error("%s: EEPROM not found\n", sc->sc_dev.dv_xname); 2970 return EIO; 2971 } 2972 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 2973 2974 return 0; 2975 } 2976 2977 static void 2978 wpi_hw_config(struct wpi_softc *sc) 2979 { 2980 uint32_t rev, hw; 2981 2982 /* voodoo from the reference driver */ 2983 hw = WPI_READ(sc, WPI_HWCONFIG); 2984 2985 rev = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_CLASS_REG); 2986 rev = PCI_REVISION(rev); 2987 if ((rev & 0xc0) == 0x40) 2988 hw |= WPI_HW_ALM_MB; 2989 else if (!(rev & 0x80)) 2990 hw |= WPI_HW_ALM_MM; 2991 2992 if (sc->cap == 0x80) 2993 hw |= WPI_HW_SKU_MRC; 2994 2995 hw &= ~WPI_HW_REV_D; 2996 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 2997 hw |= WPI_HW_REV_D; 2998 2999 if (sc->type > 1) 3000 hw |= WPI_HW_TYPE_B; 3001 3002 DPRINTF(("setting h/w config %x\n", hw)); 3003 WPI_WRITE(sc, WPI_HWCONFIG, hw); 3004 } 3005 3006 static int 3007 wpi_init(struct ifnet *ifp) 3008 { 3009 struct wpi_softc *sc = ifp->if_softc; 3010 struct ieee80211com *ic = &sc->sc_ic; 3011 uint32_t tmp; 3012 int qid, ntries, error; 3013 3014 wpi_stop(ifp,1); 3015 (void)wpi_reset(sc); 3016 3017 wpi_mem_lock(sc); 3018 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3019 DELAY(20); 3020 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3021 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3022 wpi_mem_unlock(sc); 3023 3024 (void)wpi_power_up(sc); 3025 wpi_hw_config(sc); 3026 3027 /* init Rx ring */ 3028 wpi_mem_lock(sc); 3029 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3030 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3031 offsetof(struct wpi_shared, next)); 3032 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3033 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3034 wpi_mem_unlock(sc); 3035 3036 /* init Tx rings */ 3037 wpi_mem_lock(sc); 3038 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3039 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3040 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3041 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3042 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3043 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3044 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3045 3046 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3047 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3048 3049 for (qid = 0; qid < 6; qid++) { 3050 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3051 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3052 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3053 } 3054 wpi_mem_unlock(sc); 3055 3056 /* clear "radio off" and "disable command" bits (reversed logic) */ 3057 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3058 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3059 3060 /* clear any pending interrupts */ 3061 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3062 /* enable interrupts */ 3063 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3064 3065 /* not sure why/if this is necessary... */ 3066 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3067 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3068 3069 if ((error = wpi_load_firmware(sc)) != 0) { 3070 aprint_error("%s: could not load firmware\n", sc->sc_dev.dv_xname); 3071 goto fail1; 3072 } 3073 3074 /* wait for thermal sensors to calibrate */ 3075 for (ntries = 0; ntries < 1000; ntries++) { 3076 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3077 break; 3078 DELAY(10); 3079 } 3080 if (ntries == 1000) { 3081 aprint_error("%s: timeout waiting for thermal sensors calibration\n", 3082 sc->sc_dev.dv_xname); 3083 error = ETIMEDOUT; 3084 goto fail1; 3085 } 3086 3087 DPRINTF(("temperature %d\n", sc->temp)); 3088 3089 if ((error = wpi_config(sc)) != 0) { 3090 aprint_error("%s: could not configure device\n", 3091 sc->sc_dev.dv_xname); 3092 goto fail1; 3093 } 3094 3095 ifp->if_flags &= ~IFF_OACTIVE; 3096 ifp->if_flags |= IFF_RUNNING; 3097 3098 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 3099 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 3100 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3101 } 3102 else 3103 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 3104 3105 return 0; 3106 3107 fail1: wpi_stop(ifp, 1); 3108 return error; 3109 } 3110 3111 3112 static void 3113 wpi_stop(struct ifnet *ifp, int disable) 3114 { 3115 struct wpi_softc *sc = ifp->if_softc; 3116 struct ieee80211com *ic = &sc->sc_ic; 3117 uint32_t tmp; 3118 int ac; 3119 3120 ifp->if_timer = sc->sc_tx_timer = 0; 3121 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 3122 3123 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 3124 3125 /* disable interrupts */ 3126 WPI_WRITE(sc, WPI_MASK, 0); 3127 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3128 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3129 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3130 3131 wpi_mem_lock(sc); 3132 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3133 wpi_mem_unlock(sc); 3134 3135 /* reset all Tx rings */ 3136 for (ac = 0; ac < 4; ac++) 3137 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3138 wpi_reset_tx_ring(sc, &sc->cmdq); 3139 wpi_reset_tx_ring(sc, &sc->svcq); 3140 3141 /* reset Rx ring */ 3142 wpi_reset_rx_ring(sc, &sc->rxq); 3143 3144 wpi_mem_lock(sc); 3145 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3146 wpi_mem_unlock(sc); 3147 3148 DELAY(5); 3149 3150 wpi_stop_master(sc); 3151 3152 tmp = WPI_READ(sc, WPI_RESET); 3153 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3154 } 3155
Indexes created Thu Oct 02 01:09:59 GMT 2025