1 /* $NetBSD: if_wpi.c,v 1.30 2007/11/23 22:27:02 plunky Exp $ */ 2 3 /*- 4 * Copyright (c) 2006, 2007 5 * Damien Bergamini <damien.bergamini@free.fr> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 __KERNEL_RCSID(0, "$NetBSD: if_wpi.c,v 1.30 2007/11/23 22:27:02 plunky 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 <sys/bus.h> 42 #include <machine/endian.h> 43 #include <sys/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(device_t, struct cfdata *, void *); 95 static void wpi_attach(device_t, device_t, void *); 96 static int wpi_detach(device_t , 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_fix_channel(struct ieee80211com *, struct mbuf *); 121 static void wpi_mem_lock(struct wpi_softc *); 122 static void wpi_mem_unlock(struct wpi_softc *); 123 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 124 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 125 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 126 const uint32_t *, int); 127 static int wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 128 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 129 static int wpi_load_firmware(struct wpi_softc *); 130 static void wpi_calib_timeout(void *); 131 static void wpi_iter_func(void *, struct ieee80211_node *); 132 static void wpi_power_calibration(struct wpi_softc *, int); 133 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 134 struct wpi_rx_data *); 135 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 136 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 137 static void wpi_notif_intr(struct wpi_softc *); 138 static int wpi_intr(void *); 139 static void wpi_read_eeprom(struct wpi_softc *); 140 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 141 static void wpi_read_eeprom_group(struct wpi_softc *, int); 142 static uint8_t wpi_plcp_signal(int); 143 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 144 struct ieee80211_node *, int); 145 static void wpi_start(struct ifnet *); 146 static void wpi_watchdog(struct ifnet *); 147 static int wpi_ioctl(struct ifnet *, u_long, void *); 148 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 149 static int wpi_wme_update(struct ieee80211com *); 150 static int wpi_mrr_setup(struct wpi_softc *); 151 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 152 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 153 static int wpi_set_txpower(struct wpi_softc *, 154 struct ieee80211_channel *, int); 155 static int wpi_get_power_index(struct wpi_softc *, 156 struct wpi_power_group *, struct ieee80211_channel *, int); 157 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 158 static int wpi_auth(struct wpi_softc *); 159 static int wpi_scan(struct wpi_softc *, uint16_t); 160 static int wpi_config(struct wpi_softc *); 161 static void wpi_stop_master(struct wpi_softc *); 162 static int wpi_power_up(struct wpi_softc *); 163 static int wpi_reset(struct wpi_softc *); 164 static void wpi_hw_config(struct wpi_softc *); 165 static int wpi_init(struct ifnet *); 166 static void wpi_stop(struct ifnet *, int); 167 168 CFATTACH_DECL_NEW(wpi, sizeof (struct wpi_softc), wpi_match, wpi_attach, 169 wpi_detach, NULL); 170 171 static int 172 wpi_match(device_t parent, struct cfdata *match __unused, void *aux) 173 { 174 struct pci_attach_args *pa = aux; 175 176 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) 177 return 0; 178 179 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_1 || 180 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_INTEL_PRO_WL_3945ABG_2) 181 return 1; 182 183 return 0; 184 } 185 186 /* Base Address Register */ 187 #define WPI_PCI_BAR0 0x10 188 189 static void 190 wpi_attach(device_t parent __unused, device_t self, void *aux) 191 { 192 struct wpi_softc *sc = device_private(self); 193 struct ieee80211com *ic = &sc->sc_ic; 194 struct ifnet *ifp = &sc->sc_ec.ec_if; 195 struct pci_attach_args *pa = aux; 196 const char *intrstr; 197 char devinfo[256]; 198 bus_space_tag_t memt; 199 bus_space_handle_t memh; 200 pci_intr_handle_t ih; 201 pcireg_t data; 202 int error, ac, revision; 203 204 sc->sc_dev = self; 205 sc->sc_pct = pa->pa_pc; 206 sc->sc_pcitag = pa->pa_tag; 207 208 callout_init(&sc->calib_to, 0); 209 callout_setfunc(&sc->calib_to, wpi_calib_timeout, sc); 210 211 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof devinfo); 212 revision = PCI_REVISION(pa->pa_class); 213 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, revision); 214 215 /* clear device specific PCI configuration register 0x41 */ 216 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, 0x40); 217 data &= ~0x0000ff00; 218 pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); 219 220 /* enable bus-mastering */ 221 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG); 222 data |= PCI_COMMAND_MASTER_ENABLE; 223 pci_conf_write(sc->sc_pct, sc->sc_pcitag, PCI_COMMAND_STATUS_REG, data); 224 225 /* map the register window */ 226 error = pci_mapreg_map(pa, WPI_PCI_BAR0, PCI_MAPREG_TYPE_MEM | 227 PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh, NULL, &sc->sc_sz); 228 if (error != 0) { 229 aprint_error_dev(self, "could not map memory space\n"); 230 return; 231 } 232 233 sc->sc_st = memt; 234 sc->sc_sh = memh; 235 sc->sc_dmat = pa->pa_dmat; 236 237 if (pci_intr_map(pa, &ih) != 0) { 238 aprint_error_dev(self, "could not map interrupt\n"); 239 return; 240 } 241 242 intrstr = pci_intr_string(sc->sc_pct, ih); 243 sc->sc_ih = pci_intr_establish(sc->sc_pct, ih, IPL_NET, wpi_intr, sc); 244 if (sc->sc_ih == NULL) { 245 aprint_error_dev(self, "could not establish interrupt"); 246 if (intrstr != NULL) 247 aprint_error(" at %s", intrstr); 248 aprint_error("\n"); 249 return; 250 } 251 aprint_normal_dev(self, "interrupting at %s\n", intrstr); 252 253 if (wpi_reset(sc) != 0) { 254 aprint_error_dev(self, "could not reset adapter\n"); 255 return; 256 } 257 258 /* 259 * Allocate DMA memory for firmware transfers. 260 */ 261 if ((error = wpi_alloc_fwmem(sc)) != 0) 262 return; 263 264 /* 265 * Allocate shared page and Tx/Rx rings. 266 */ 267 if ((error = wpi_alloc_shared(sc)) != 0) { 268 aprint_error_dev(self, "could not allocate shared area\n"); 269 goto fail1; 270 } 271 272 if ((error = wpi_alloc_rpool(sc)) != 0) { 273 aprint_error_dev(self, "could not allocate Rx buffers\n"); 274 goto fail2; 275 } 276 277 for (ac = 0; ac < 4; ac++) { 278 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac); 279 if (error != 0) { 280 aprint_error_dev(self, "could not allocate Tx ring %d\n", ac); 281 goto fail3; 282 } 283 } 284 285 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 286 if (error != 0) { 287 aprint_error_dev(self, "could not allocate command ring\n"); 288 goto fail3; 289 } 290 291 if (wpi_alloc_rx_ring(sc, &sc->rxq) != 0) { 292 aprint_error_dev(self, "could not allocate Rx ring\n"); 293 goto fail4; 294 } 295 296 ic->ic_ifp = ifp; 297 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 298 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 299 ic->ic_state = IEEE80211_S_INIT; 300 301 /* set device capabilities */ 302 ic->ic_caps = 303 IEEE80211_C_IBSS | /* IBSS mode support */ 304 IEEE80211_C_WPA | /* 802.11i */ 305 IEEE80211_C_MONITOR | /* monitor mode supported */ 306 IEEE80211_C_TXPMGT | /* tx power management */ 307 IEEE80211_C_SHSLOT | /* short slot time supported */ 308 IEEE80211_C_SHPREAMBLE | /* short preamble supported */ 309 IEEE80211_C_WME; /* 802.11e */ 310 311 /* read supported channels and MAC address from EEPROM */ 312 wpi_read_eeprom(sc); 313 314 /* set supported .11a, .11b, .11g rates */ 315 ic->ic_sup_rates[IEEE80211_MODE_11A] = wpi_rateset_11a; 316 ic->ic_sup_rates[IEEE80211_MODE_11B] = wpi_rateset_11b; 317 ic->ic_sup_rates[IEEE80211_MODE_11G] = wpi_rateset_11g; 318 319 ic->ic_ibss_chan = &ic->ic_channels[0]; 320 321 ifp->if_softc = sc; 322 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 323 ifp->if_init = wpi_init; 324 ifp->if_stop = wpi_stop; 325 ifp->if_ioctl = wpi_ioctl; 326 ifp->if_start = wpi_start; 327 ifp->if_watchdog = wpi_watchdog; 328 IFQ_SET_READY(&ifp->if_snd); 329 memcpy(ifp->if_xname, device_xname(self), IFNAMSIZ); 330 331 if_attach(ifp); 332 ieee80211_ifattach(ic); 333 /* override default methods */ 334 ic->ic_node_alloc = wpi_node_alloc; 335 ic->ic_newassoc = wpi_newassoc; 336 ic->ic_wme.wme_update = wpi_wme_update; 337 338 /* override state transition machine */ 339 sc->sc_newstate = ic->ic_newstate; 340 ic->ic_newstate = wpi_newstate; 341 ieee80211_media_init(ic, wpi_media_change, ieee80211_media_status); 342 343 sc->amrr.amrr_min_success_threshold = 1; 344 sc->amrr.amrr_max_success_threshold = 15; 345 346 /* set powerhook */ 347 sc->powerhook = powerhook_establish(device_xname(self), wpi_power, sc); 348 349 #if NBPFILTER > 0 350 bpfattach2(ifp, DLT_IEEE802_11_RADIO, 351 sizeof (struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN, 352 &sc->sc_drvbpf); 353 354 sc->sc_rxtap_len = sizeof sc->sc_rxtapu; 355 sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len); 356 sc->sc_rxtap.wr_ihdr.it_present = htole32(WPI_RX_RADIOTAP_PRESENT); 357 358 sc->sc_txtap_len = sizeof sc->sc_txtapu; 359 sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len); 360 sc->sc_txtap.wt_ihdr.it_present = htole32(WPI_TX_RADIOTAP_PRESENT); 361 #endif 362 363 ieee80211_announce(ic); 364 365 return; 366 367 fail4: wpi_free_tx_ring(sc, &sc->cmdq); 368 fail3: while (--ac >= 0) 369 wpi_free_tx_ring(sc, &sc->txq[ac]); 370 wpi_free_rpool(sc); 371 fail2: wpi_free_shared(sc); 372 fail1: wpi_free_fwmem(sc); 373 } 374 375 static int 376 wpi_detach(device_t self, int flags __unused) 377 { 378 struct wpi_softc *sc = device_private(self); 379 struct ifnet *ifp = sc->sc_ic.ic_ifp; 380 int ac; 381 382 wpi_stop(ifp, 1); 383 384 #if NBPFILTER > 0 385 if (ifp != NULL) 386 bpfdetach(ifp); 387 #endif 388 ieee80211_ifdetach(&sc->sc_ic); 389 if (ifp != NULL) 390 if_detach(ifp); 391 392 for (ac = 0; ac < 4; ac++) 393 wpi_free_tx_ring(sc, &sc->txq[ac]); 394 wpi_free_tx_ring(sc, &sc->cmdq); 395 wpi_free_rx_ring(sc, &sc->rxq); 396 wpi_free_rpool(sc); 397 wpi_free_shared(sc); 398 399 if (sc->sc_ih != NULL) { 400 pci_intr_disestablish(sc->sc_pct, sc->sc_ih); 401 sc->sc_ih = NULL; 402 } 403 404 bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_sz); 405 406 return 0; 407 } 408 409 static void 410 wpi_power(int why, void *arg) 411 { 412 struct wpi_softc *sc = arg; 413 struct ifnet *ifp; 414 pcireg_t data; 415 int s; 416 417 if (why != PWR_RESUME) 418 return; 419 420 /* clear device specific PCI configuration register 0x41 */ 421 data = pci_conf_read(sc->sc_pct, sc->sc_pcitag, 0x40); 422 data &= ~0x0000ff00; 423 pci_conf_write(sc->sc_pct, sc->sc_pcitag, 0x40, data); 424 425 s = splnet(); 426 ifp = sc->sc_ic.ic_ifp; 427 if (ifp->if_flags & IFF_UP) { 428 ifp->if_init(ifp); 429 if (ifp->if_flags & IFF_RUNNING) 430 ifp->if_start(ifp); 431 } 432 splx(s); 433 } 434 435 static int 436 wpi_dma_contig_alloc(bus_dma_tag_t tag, struct wpi_dma_info *dma, 437 void **kvap, bus_size_t size, bus_size_t alignment, int flags) 438 { 439 int nsegs, error; 440 441 dma->tag = tag; 442 dma->size = size; 443 444 error = bus_dmamap_create(tag, size, 1, size, 0, flags, &dma->map); 445 if (error != 0) 446 goto fail; 447 448 error = bus_dmamem_alloc(tag, size, alignment, 0, &dma->seg, 1, &nsegs, 449 flags); 450 if (error != 0) 451 goto fail; 452 453 error = bus_dmamem_map(tag, &dma->seg, 1, size, &dma->vaddr, flags); 454 if (error != 0) 455 goto fail; 456 457 error = bus_dmamap_load(tag, dma->map, dma->vaddr, size, NULL, flags); 458 if (error != 0) 459 goto fail; 460 461 memset(dma->vaddr, 0, size); 462 463 dma->paddr = dma->map->dm_segs[0].ds_addr; 464 if (kvap != NULL) 465 *kvap = dma->vaddr; 466 467 return 0; 468 469 fail: wpi_dma_contig_free(dma); 470 return error; 471 } 472 473 static void 474 wpi_dma_contig_free(struct wpi_dma_info *dma) 475 { 476 if (dma->map != NULL) { 477 if (dma->vaddr != NULL) { 478 bus_dmamap_unload(dma->tag, dma->map); 479 bus_dmamem_unmap(dma->tag, dma->vaddr, dma->size); 480 bus_dmamem_free(dma->tag, &dma->seg, 1); 481 dma->vaddr = NULL; 482 } 483 bus_dmamap_destroy(dma->tag, dma->map); 484 dma->map = NULL; 485 } 486 } 487 488 /* 489 * Allocate a shared page between host and NIC. 490 */ 491 static int 492 wpi_alloc_shared(struct wpi_softc *sc) 493 { 494 int error; 495 /* must be aligned on a 4K-page boundary */ 496 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->shared_dma, 497 (void **)&sc->shared, sizeof (struct wpi_shared), 498 WPI_BUF_ALIGN,BUS_DMA_NOWAIT); 499 if (error != 0) 500 aprint_error_dev(sc->sc_dev, 501 "could not allocate shared area DMA memory\n"); 502 503 return error; 504 } 505 506 static void 507 wpi_free_shared(struct wpi_softc *sc) 508 { 509 wpi_dma_contig_free(&sc->shared_dma); 510 } 511 512 /* 513 * Allocate DMA-safe memory for firmware transfer. 514 */ 515 static int 516 wpi_alloc_fwmem(struct wpi_softc *sc) 517 { 518 int error; 519 /* allocate enough contiguous space to store text and data */ 520 error = wpi_dma_contig_alloc(sc->sc_dmat, &sc->fw_dma, NULL, 521 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 0, 522 BUS_DMA_NOWAIT); 523 524 if (error != 0) 525 aprint_error_dev(sc->sc_dev, 526 "could not allocate firmware transfer area" 527 "DMA memory\n"); 528 return error; 529 } 530 531 static void 532 wpi_free_fwmem(struct wpi_softc *sc) 533 { 534 wpi_dma_contig_free(&sc->fw_dma); 535 } 536 537 538 static struct wpi_rbuf * 539 wpi_alloc_rbuf(struct wpi_softc *sc) 540 { 541 struct wpi_rbuf *rbuf; 542 543 rbuf = SLIST_FIRST(&sc->rxq.freelist); 544 if (rbuf == NULL) 545 return NULL; 546 SLIST_REMOVE_HEAD(&sc->rxq.freelist, next); 547 sc->rxq.nb_free_entries --; 548 549 return rbuf; 550 } 551 552 /* 553 * This is called automatically by the network stack when the mbuf to which our 554 * Rx buffer is attached is freed. 555 */ 556 static void 557 wpi_free_rbuf(struct mbuf* m, void *buf, size_t size, void *arg) 558 { 559 struct wpi_rbuf *rbuf = arg; 560 struct wpi_softc *sc = rbuf->sc; 561 562 /* put the buffer back in the free list */ 563 564 SLIST_INSERT_HEAD(&sc->rxq.freelist, rbuf, next); 565 sc->rxq.nb_free_entries ++; 566 567 if (__predict_true(m != NULL)) 568 pool_cache_put(mb_cache, m); 569 } 570 571 static int 572 wpi_alloc_rpool(struct wpi_softc *sc) 573 { 574 struct wpi_rx_ring *ring = &sc->rxq; 575 struct wpi_rbuf *rbuf; 576 int i, error; 577 578 /* allocate a big chunk of DMA'able memory.. */ 579 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->buf_dma, NULL, 580 WPI_RBUF_COUNT * WPI_RBUF_SIZE, WPI_BUF_ALIGN, BUS_DMA_NOWAIT); 581 if (error != 0) { 582 aprint_normal_dev(sc->sc_dev, 583 "could not allocate Rx buffers DMA memory\n"); 584 return error; 585 } 586 587 /* ..and split it into 3KB chunks */ 588 SLIST_INIT(&ring->freelist); 589 for (i = 0; i < WPI_RBUF_COUNT; i++) { 590 rbuf = &ring->rbuf[i]; 591 rbuf->sc = sc; /* backpointer for callbacks */ 592 rbuf->vaddr = (char *)ring->buf_dma.vaddr + i * WPI_RBUF_SIZE; 593 rbuf->paddr = ring->buf_dma.paddr + i * WPI_RBUF_SIZE; 594 595 SLIST_INSERT_HEAD(&ring->freelist, rbuf, next); 596 } 597 598 ring->nb_free_entries = WPI_RBUF_COUNT; 599 return 0; 600 } 601 602 static void 603 wpi_free_rpool(struct wpi_softc *sc) 604 { 605 wpi_dma_contig_free(&sc->rxq.buf_dma); 606 } 607 608 static int 609 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 610 { 611 struct wpi_rx_data *data; 612 struct wpi_rbuf *rbuf; 613 int i, error; 614 615 ring->cur = 0; 616 617 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 618 (void **)&ring->desc, 619 WPI_RX_RING_COUNT * sizeof (struct wpi_rx_desc), 620 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 621 if (error != 0) { 622 aprint_error_dev(sc->sc_dev, "could not allocate rx ring DMA memory\n"); 623 goto fail; 624 } 625 626 /* 627 * Setup Rx buffers. 628 */ 629 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 630 data = &ring->data[i]; 631 632 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 633 if (data->m == NULL) { 634 aprint_error_dev(sc->sc_dev, "could not allocate rx mbuf\n"); 635 error = ENOMEM; 636 goto fail; 637 } 638 if ((rbuf = wpi_alloc_rbuf(sc)) == NULL) { 639 m_freem(data->m); 640 data->m = NULL; 641 aprint_error_dev(sc->sc_dev, "could not allocate rx cluster\n"); 642 error = ENOMEM; 643 goto fail; 644 } 645 /* attach Rx buffer to mbuf */ 646 MEXTADD(data->m, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 647 rbuf); 648 data->m->m_flags |= M_EXT_RW; 649 650 ring->desc[i] = htole32(rbuf->paddr); 651 } 652 653 return 0; 654 655 fail: wpi_free_rx_ring(sc, ring); 656 return error; 657 } 658 659 static void 660 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 661 { 662 int ntries; 663 664 wpi_mem_lock(sc); 665 666 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 667 for (ntries = 0; ntries < 100; ntries++) { 668 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 669 break; 670 DELAY(10); 671 } 672 #ifdef WPI_DEBUG 673 if (ntries == 100 && wpi_debug > 0) 674 aprint_error_dev(sc->sc_dev, "timeout resetting Rx ring\n"); 675 #endif 676 wpi_mem_unlock(sc); 677 678 ring->cur = 0; 679 } 680 681 static void 682 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 683 { 684 int i; 685 686 wpi_dma_contig_free(&ring->desc_dma); 687 688 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 689 if (ring->data[i].m != NULL) 690 m_freem(ring->data[i].m); 691 } 692 } 693 694 static int 695 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 696 int qid) 697 { 698 struct wpi_tx_data *data; 699 int i, error; 700 701 ring->qid = qid; 702 ring->count = count; 703 ring->queued = 0; 704 ring->cur = 0; 705 706 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->desc_dma, 707 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 708 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 709 if (error != 0) { 710 aprint_error_dev(sc->sc_dev, "could not allocate tx ring DMA memory\n"); 711 goto fail; 712 } 713 714 /* update shared page with ring's base address */ 715 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 716 717 error = wpi_dma_contig_alloc(sc->sc_dmat, &ring->cmd_dma, 718 (void **)&ring->cmd, 719 count * sizeof (struct wpi_tx_cmd), 4, BUS_DMA_NOWAIT); 720 if (error != 0) { 721 aprint_error_dev(sc->sc_dev, "could not allocate tx cmd DMA memory\n"); 722 goto fail; 723 } 724 725 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 726 M_NOWAIT); 727 if (ring->data == NULL) { 728 aprint_error_dev(sc->sc_dev, "could not allocate tx data slots\n"); 729 goto fail; 730 } 731 732 memset(ring->data, 0, count * sizeof (struct wpi_tx_data)); 733 734 for (i = 0; i < count; i++) { 735 data = &ring->data[i]; 736 737 error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 738 WPI_MAX_SCATTER - 1, MCLBYTES, 0, BUS_DMA_NOWAIT, 739 &data->map); 740 if (error != 0) { 741 aprint_error_dev(sc->sc_dev, "could not create tx buf DMA map\n"); 742 goto fail; 743 } 744 } 745 746 return 0; 747 748 fail: wpi_free_tx_ring(sc, ring); 749 return error; 750 } 751 752 static void 753 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 754 { 755 struct wpi_tx_data *data; 756 int i, ntries; 757 758 wpi_mem_lock(sc); 759 760 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 761 for (ntries = 0; ntries < 100; ntries++) { 762 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 763 break; 764 DELAY(10); 765 } 766 #ifdef WPI_DEBUG 767 if (ntries == 100 && wpi_debug > 0) { 768 aprint_error_dev(sc->sc_dev, "timeout resetting Tx ring %d\n", 769 ring->qid); 770 } 771 #endif 772 wpi_mem_unlock(sc); 773 774 for (i = 0; i < ring->count; i++) { 775 data = &ring->data[i]; 776 777 if (data->m != NULL) { 778 bus_dmamap_unload(sc->sc_dmat, data->map); 779 m_freem(data->m); 780 data->m = NULL; 781 } 782 } 783 784 ring->queued = 0; 785 ring->cur = 0; 786 } 787 788 static void 789 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 790 { 791 struct wpi_tx_data *data; 792 int i; 793 794 wpi_dma_contig_free(&ring->desc_dma); 795 wpi_dma_contig_free(&ring->cmd_dma); 796 797 if (ring->data != NULL) { 798 for (i = 0; i < ring->count; i++) { 799 data = &ring->data[i]; 800 801 if (data->m != NULL) { 802 bus_dmamap_unload(sc->sc_dmat, data->map); 803 m_freem(data->m); 804 } 805 } 806 free(ring->data, M_DEVBUF); 807 } 808 } 809 810 /*ARGUSED*/ 811 static struct ieee80211_node * 812 wpi_node_alloc(struct ieee80211_node_table *nt __unused) 813 { 814 struct wpi_node *wn; 815 816 wn = malloc(sizeof (struct wpi_node), M_DEVBUF, M_NOWAIT); 817 818 if (wn != NULL) 819 memset(wn, 0, sizeof (struct wpi_node)); 820 return (struct ieee80211_node *)wn; 821 } 822 823 static void 824 wpi_newassoc(struct ieee80211_node *ni, int isnew) 825 { 826 struct wpi_softc *sc = ni->ni_ic->ic_ifp->if_softc; 827 int i; 828 829 ieee80211_amrr_node_init(&sc->amrr, &((struct wpi_node *)ni)->amn); 830 831 /* set rate to some reasonable initial value */ 832 for (i = ni->ni_rates.rs_nrates - 1; 833 i > 0 && (ni->ni_rates.rs_rates[i] & IEEE80211_RATE_VAL) > 72; 834 i--); 835 ni->ni_txrate = i; 836 } 837 838 static int 839 wpi_media_change(struct ifnet *ifp) 840 { 841 int error; 842 843 error = ieee80211_media_change(ifp); 844 if (error != ENETRESET) 845 return error; 846 847 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) == (IFF_UP | IFF_RUNNING)) 848 wpi_init(ifp); 849 850 return 0; 851 } 852 853 static int 854 wpi_newstate(struct ieee80211com *ic, enum ieee80211_state nstate, int arg) 855 { 856 struct ifnet *ifp = ic->ic_ifp; 857 struct wpi_softc *sc = ifp->if_softc; 858 struct ieee80211_node *ni; 859 int error; 860 861 callout_stop(&sc->calib_to); 862 863 switch (nstate) { 864 case IEEE80211_S_SCAN: 865 866 if (sc->is_scanning) 867 break; 868 869 sc->is_scanning = true; 870 ieee80211_node_table_reset(&ic->ic_scan); 871 ic->ic_flags |= IEEE80211_F_SCAN | IEEE80211_F_ASCAN; 872 873 /* make the link LED blink while we're scanning */ 874 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 875 876 if ((error = wpi_scan(sc, IEEE80211_CHAN_G)) != 0) { 877 aprint_error_dev(sc->sc_dev, "could not initiate scan\n"); 878 ic->ic_flags &= ~(IEEE80211_F_SCAN | IEEE80211_F_ASCAN); 879 return error; 880 } 881 882 ic->ic_state = nstate; 883 return 0; 884 885 case IEEE80211_S_ASSOC: 886 if (ic->ic_state != IEEE80211_S_RUN) 887 break; 888 /* FALLTHROUGH */ 889 case IEEE80211_S_AUTH: 890 sc->config.associd = 0; 891 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 892 if ((error = wpi_auth(sc)) != 0) { 893 aprint_error_dev(sc->sc_dev, 894 "could not send authentication request\n"); 895 return error; 896 } 897 break; 898 899 case IEEE80211_S_RUN: 900 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 901 /* link LED blinks while monitoring */ 902 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 903 break; 904 } 905 906 ni = ic->ic_bss; 907 908 if (ic->ic_opmode != IEEE80211_M_STA) { 909 (void) wpi_auth(sc); /* XXX */ 910 wpi_setup_beacon(sc, ni); 911 } 912 913 wpi_enable_tsf(sc, ni); 914 915 /* update adapter's configuration */ 916 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 917 /* short preamble/slot time are negotiated when associating */ 918 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 919 WPI_CONFIG_SHSLOT); 920 if (ic->ic_flags & IEEE80211_F_SHSLOT) 921 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 922 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 923 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 924 sc->config.filter |= htole32(WPI_FILTER_BSS); 925 if (ic->ic_opmode != IEEE80211_M_STA) 926 sc->config.filter |= htole32(WPI_FILTER_BEACON); 927 928 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 929 930 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 931 sc->config.flags)); 932 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 933 sizeof (struct wpi_config), 1); 934 if (error != 0) { 935 aprint_error_dev(sc->sc_dev, "could not update configuration\n"); 936 return error; 937 } 938 939 /* configuration has changed, set Tx power accordingly */ 940 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 941 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 942 return error; 943 } 944 945 if (ic->ic_opmode == IEEE80211_M_STA) { 946 /* fake a join to init the tx rate */ 947 wpi_newassoc(ni, 1); 948 } 949 950 /* start periodic calibration timer */ 951 sc->calib_cnt = 0; 952 callout_schedule(&sc->calib_to, hz/2); 953 954 /* link LED always on while associated */ 955 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 956 break; 957 958 case IEEE80211_S_INIT: 959 sc->is_scanning = false; 960 break; 961 } 962 963 return sc->sc_newstate(ic, nstate, arg); 964 } 965 966 /* 967 * XXX: Hack to set the current channel to the value advertised in beacons or 968 * probe responses. Only used during AP detection. 969 * XXX: Duplicated from if_iwi.c 970 */ 971 static void 972 wpi_fix_channel(struct ieee80211com *ic, struct mbuf *m) 973 { 974 struct ieee80211_frame *wh; 975 uint8_t subtype; 976 uint8_t *frm, *efrm; 977 978 wh = mtod(m, struct ieee80211_frame *); 979 980 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) != IEEE80211_FC0_TYPE_MGT) 981 return; 982 983 subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 984 985 if (subtype != IEEE80211_FC0_SUBTYPE_BEACON && 986 subtype != IEEE80211_FC0_SUBTYPE_PROBE_RESP) 987 return; 988 989 frm = (uint8_t *)(wh + 1); 990 efrm = mtod(m, uint8_t *) + m->m_len; 991 992 frm += 12; /* skip tstamp, bintval and capinfo fields */ 993 while (frm < efrm) { 994 if (*frm == IEEE80211_ELEMID_DSPARMS) 995 #if IEEE80211_CHAN_MAX < 255 996 if (frm[2] <= IEEE80211_CHAN_MAX) 997 #endif 998 ic->ic_curchan = &ic->ic_channels[frm[2]]; 999 1000 frm += frm[1] + 2; 1001 } 1002 } 1003 1004 /* 1005 * Grab exclusive access to NIC memory. 1006 */ 1007 static void 1008 wpi_mem_lock(struct wpi_softc *sc) 1009 { 1010 uint32_t tmp; 1011 int ntries; 1012 1013 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1014 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1015 1016 /* spin until we actually get the lock */ 1017 for (ntries = 0; ntries < 1000; ntries++) { 1018 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1019 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1020 break; 1021 DELAY(10); 1022 } 1023 if (ntries == 1000) 1024 aprint_error_dev(sc->sc_dev, "could not lock memory\n"); 1025 } 1026 1027 /* 1028 * Release lock on NIC memory. 1029 */ 1030 static void 1031 wpi_mem_unlock(struct wpi_softc *sc) 1032 { 1033 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1034 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1035 } 1036 1037 static uint32_t 1038 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1039 { 1040 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1041 return WPI_READ(sc, WPI_READ_MEM_DATA); 1042 } 1043 1044 static void 1045 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1046 { 1047 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1048 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1049 } 1050 1051 static void 1052 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1053 const uint32_t *data, int wlen) 1054 { 1055 for (; wlen > 0; wlen--, data++, addr += 4) 1056 wpi_mem_write(sc, addr, *data); 1057 } 1058 1059 1060 /* 1061 * Read `len' bytes from the EEPROM. We access the EEPROM through the MAC 1062 * instead of using the traditional bit-bang method. 1063 */ 1064 static int 1065 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1066 { 1067 uint8_t *out = data; 1068 uint32_t val; 1069 int ntries; 1070 1071 wpi_mem_lock(sc); 1072 for (; len > 0; len -= 2, addr++) { 1073 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1074 1075 for (ntries = 0; ntries < 10; ntries++) { 1076 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & 1077 WPI_EEPROM_READY) 1078 break; 1079 DELAY(5); 1080 } 1081 if (ntries == 10) { 1082 aprint_error_dev(sc->sc_dev, "could not read EEPROM\n"); 1083 return ETIMEDOUT; 1084 } 1085 *out++ = val >> 16; 1086 if (len > 1) 1087 *out++ = val >> 24; 1088 } 1089 wpi_mem_unlock(sc); 1090 1091 return 0; 1092 } 1093 1094 /* 1095 * The firmware boot code is small and is intended to be copied directly into 1096 * the NIC internal memory. 1097 */ 1098 int 1099 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *ucode, int size) 1100 { 1101 int ntries; 1102 1103 size /= sizeof (uint32_t); 1104 1105 wpi_mem_lock(sc); 1106 1107 /* copy microcode image into NIC memory */ 1108 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1109 (const uint32_t *)ucode, size); 1110 1111 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1112 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1113 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1114 1115 /* run microcode */ 1116 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1117 1118 /* wait for transfer to complete */ 1119 for (ntries = 0; ntries < 1000; ntries++) { 1120 if (!(wpi_mem_read(sc, WPI_MEM_UCODE_CTL) & WPI_UC_RUN)) 1121 break; 1122 DELAY(10); 1123 } 1124 if (ntries == 1000) { 1125 wpi_mem_unlock(sc); 1126 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n"); 1127 return ETIMEDOUT; 1128 } 1129 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1130 1131 wpi_mem_unlock(sc); 1132 1133 return 0; 1134 } 1135 1136 static int 1137 wpi_load_firmware(struct wpi_softc *sc) 1138 { 1139 struct wpi_dma_info *dma = &sc->fw_dma; 1140 struct wpi_firmware_hdr hdr; 1141 const uint8_t *init_text, *init_data, *main_text, *main_data; 1142 const uint8_t *boot_text; 1143 uint32_t init_textsz, init_datasz, main_textsz, main_datasz; 1144 uint32_t boot_textsz; 1145 firmware_handle_t fw; 1146 u_char *dfw; 1147 size_t size; 1148 int error; 1149 1150 /* load firmware image from disk */ 1151 if ((error = firmware_open("if_wpi","iwlwifi-3945.ucode", &fw) != 0)) { 1152 aprint_error_dev(sc->sc_dev, "could not read firmware file\n"); 1153 goto fail1; 1154 } 1155 1156 size = firmware_get_size(fw); 1157 1158 /* extract firmware header information */ 1159 if (size < sizeof (struct wpi_firmware_hdr)) { 1160 aprint_error_dev(sc->sc_dev, "truncated firmware header: %zu bytes\n", 1161 size); 1162 error = EINVAL; 1163 goto fail2; 1164 } 1165 1166 if ((error = firmware_read(fw, 0, &hdr, 1167 sizeof (struct wpi_firmware_hdr))) != 0) { 1168 aprint_error_dev(sc->sc_dev, "can't get firmware header\n"); 1169 goto fail2; 1170 } 1171 1172 main_textsz = le32toh(hdr.main_textsz); 1173 main_datasz = le32toh(hdr.main_datasz); 1174 init_textsz = le32toh(hdr.init_textsz); 1175 init_datasz = le32toh(hdr.init_datasz); 1176 boot_textsz = le32toh(hdr.boot_textsz); 1177 1178 /* sanity-check firmware segments sizes */ 1179 if (main_textsz > WPI_FW_MAIN_TEXT_MAXSZ || 1180 main_datasz > WPI_FW_MAIN_DATA_MAXSZ || 1181 init_textsz > WPI_FW_INIT_TEXT_MAXSZ || 1182 init_datasz > WPI_FW_INIT_DATA_MAXSZ || 1183 boot_textsz > WPI_FW_BOOT_TEXT_MAXSZ || 1184 (boot_textsz & 3) != 0) { 1185 aprint_error_dev(sc->sc_dev, "invalid firmware header\n"); 1186 error = EINVAL; 1187 goto fail2; 1188 } 1189 1190 /* check that all firmware segments are present */ 1191 if (size < sizeof (struct wpi_firmware_hdr) + main_textsz + 1192 main_datasz + init_textsz + init_datasz + boot_textsz) { 1193 aprint_error_dev(sc->sc_dev, "firmware file too short: %zu bytes\n", 1194 size); 1195 error = EINVAL; 1196 goto fail2; 1197 } 1198 1199 dfw = firmware_malloc(size); 1200 if (dfw == NULL) { 1201 aprint_error_dev(sc->sc_dev, "not enough memory to stock firmware\n"); 1202 error = ENOMEM; 1203 goto fail2; 1204 } 1205 1206 if ((error = firmware_read(fw, 0, dfw, size)) != 0) { 1207 aprint_error_dev(sc->sc_dev, "can't get firmware\n"); 1208 goto fail2; 1209 } 1210 1211 /* get pointers to firmware segments */ 1212 main_text = dfw + sizeof (struct wpi_firmware_hdr); 1213 main_data = main_text + main_textsz; 1214 init_text = main_data + main_datasz; 1215 init_data = init_text + init_textsz; 1216 boot_text = init_data + init_datasz; 1217 1218 /* copy initialization images into pre-allocated DMA-safe memory */ 1219 memcpy(dma->vaddr, init_data, init_datasz); 1220 memcpy((char*)dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, init_text, init_textsz); 1221 1222 /* tell adapter where to find initialization images */ 1223 wpi_mem_lock(sc); 1224 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1225 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, init_datasz); 1226 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1227 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 1228 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, init_textsz); 1229 wpi_mem_unlock(sc); 1230 1231 /* load firmware boot code */ 1232 if ((error = wpi_load_microcode(sc, boot_text, boot_textsz)) != 0) { 1233 aprint_error_dev(sc->sc_dev, "could not load boot firmware\n"); 1234 goto fail3; 1235 } 1236 1237 /* now press "execute" ;-) */ 1238 WPI_WRITE(sc, WPI_RESET, 0); 1239 1240 /* ..and wait at most one second for adapter to initialize */ 1241 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1242 /* this isn't what was supposed to happen.. */ 1243 aprint_error_dev(sc->sc_dev, 1244 "timeout waiting for adapter to initialize\n"); 1245 } 1246 1247 /* copy runtime images into pre-allocated DMA-safe memory */ 1248 memcpy(dma->vaddr, main_data, main_datasz); 1249 memcpy((char*)dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, main_text, main_textsz); 1250 1251 /* tell adapter where to find runtime images */ 1252 wpi_mem_lock(sc); 1253 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 1254 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, main_datasz); 1255 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 1256 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 1257 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | main_textsz); 1258 wpi_mem_unlock(sc); 1259 1260 /* wait at most one second for second alive notification */ 1261 if ((error = tsleep(sc, PCATCH, "wpiinit", hz)) != 0) { 1262 /* this isn't what was supposed to happen.. */ 1263 aprint_error_dev(sc->sc_dev, 1264 "timeout waiting for adapter to initialize\n"); 1265 } 1266 1267 1268 fail3: firmware_free(dfw,size); 1269 fail2: firmware_close(fw); 1270 fail1: return error; 1271 } 1272 1273 static void 1274 wpi_calib_timeout(void *arg) 1275 { 1276 struct wpi_softc *sc = arg; 1277 struct ieee80211com *ic = &sc->sc_ic; 1278 int temp, s; 1279 1280 /* automatic rate control triggered every 500ms */ 1281 if (ic->ic_fixed_rate == -1) { 1282 s = splnet(); 1283 if (ic->ic_opmode == IEEE80211_M_STA) 1284 wpi_iter_func(sc, ic->ic_bss); 1285 else 1286 ieee80211_iterate_nodes(&ic->ic_sta, wpi_iter_func, sc); 1287 splx(s); 1288 } 1289 1290 /* update sensor data */ 1291 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 1292 1293 /* automatic power calibration every 60s */ 1294 if (++sc->calib_cnt >= 120) { 1295 wpi_power_calibration(sc, temp); 1296 sc->calib_cnt = 0; 1297 } 1298 1299 callout_schedule(&sc->calib_to, hz/2); 1300 } 1301 1302 static void 1303 wpi_iter_func(void *arg, struct ieee80211_node *ni) 1304 { 1305 struct wpi_softc *sc = arg; 1306 struct wpi_node *wn = (struct wpi_node *)ni; 1307 1308 ieee80211_amrr_choose(&sc->amrr, ni, &wn->amn); 1309 } 1310 1311 /* 1312 * This function is called periodically (every 60 seconds) to adjust output 1313 * power to temperature changes. 1314 */ 1315 void 1316 wpi_power_calibration(struct wpi_softc *sc, int temp) 1317 { 1318 /* sanity-check read value */ 1319 if (temp < -260 || temp > 25) { 1320 /* this can't be correct, ignore */ 1321 DPRINTF(("out-of-range temperature reported: %d\n", temp)); 1322 return; 1323 } 1324 1325 DPRINTF(("temperature %d->%d\n", sc->temp, temp)); 1326 1327 /* adjust Tx power if need be */ 1328 if (abs(temp - sc->temp) <= 6) 1329 return; 1330 1331 sc->temp = temp; 1332 1333 if (wpi_set_txpower(sc, sc->sc_ic.ic_bss->ni_chan, 1) != 0) { 1334 /* just warn, too bad for the automatic calibration... */ 1335 aprint_error_dev(sc->sc_dev, "could not adjust Tx power\n"); 1336 } 1337 } 1338 1339 static void 1340 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1341 struct wpi_rx_data *data) 1342 { 1343 struct ieee80211com *ic = &sc->sc_ic; 1344 struct ifnet *ifp = ic->ic_ifp; 1345 struct wpi_rx_ring *ring = &sc->rxq; 1346 struct wpi_rx_stat *stat; 1347 struct wpi_rx_head *head; 1348 struct wpi_rx_tail *tail; 1349 struct wpi_rbuf *rbuf; 1350 struct ieee80211_frame *wh; 1351 struct ieee80211_node *ni; 1352 struct mbuf *m, *mnew; 1353 int data_off ; 1354 1355 stat = (struct wpi_rx_stat *)(desc + 1); 1356 1357 if (stat->len > WPI_STAT_MAXLEN) { 1358 aprint_error_dev(sc->sc_dev, "invalid rx statistic header\n"); 1359 ifp->if_ierrors++; 1360 return; 1361 } 1362 1363 head = (struct wpi_rx_head *)((char *)(stat + 1) + stat->len); 1364 tail = (struct wpi_rx_tail *)((char *)(head + 1) + le16toh(head->len)); 1365 1366 DPRINTFN(4, ("rx intr: idx=%d len=%d stat len=%d rssi=%d rate=%x " 1367 "chan=%d tstamp=%" PRId64 "\n", ring->cur, le32toh(desc->len), 1368 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1369 le64toh(tail->tstamp))); 1370 1371 /* 1372 * Discard Rx frames with bad CRC early (XXX we may want to pass them 1373 * to radiotap in monitor mode). 1374 */ 1375 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1376 DPRINTF(("rx tail flags error %x\n", le32toh(tail->flags))); 1377 ifp->if_ierrors++; 1378 return; 1379 } 1380 1381 /* Compute where are the useful datas */ 1382 data_off = (char*)(head + 1) - mtod(data->m, char*); 1383 1384 /* 1385 * If the number of free entry is too low 1386 * just dup the data->m socket and reuse the same rbuf entry 1387 */ 1388 if (sc->rxq.nb_free_entries <= WPI_RBUF_LOW_LIMIT) { 1389 1390 /* Prepare the mbuf for the m_dup */ 1391 data->m->m_pkthdr.len = data->m->m_len = le16toh(head->len); 1392 data->m->m_data = (char*) data->m->m_data + data_off; 1393 1394 m = m_dup(data->m,0,M_COPYALL,M_DONTWAIT); 1395 1396 /* Restore the m_data pointer for future use */ 1397 data->m->m_data = (char*) data->m->m_data - data_off; 1398 1399 if (m == NULL) { 1400 ifp->if_ierrors++; 1401 return; 1402 } 1403 } else { 1404 1405 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1406 if (mnew == NULL) { 1407 ifp->if_ierrors++; 1408 return; 1409 } 1410 1411 rbuf = wpi_alloc_rbuf(sc); 1412 KASSERT(rbuf != NULL); 1413 1414 /* attach Rx buffer to mbuf */ 1415 MEXTADD(mnew, rbuf->vaddr, WPI_RBUF_SIZE, 0, wpi_free_rbuf, 1416 rbuf); 1417 mnew->m_flags |= M_EXT_RW; 1418 1419 m = data->m; 1420 data->m = mnew; 1421 1422 /* update Rx descriptor */ 1423 ring->desc[ring->cur] = htole32(rbuf->paddr); 1424 1425 m->m_data = (char*)m->m_data + data_off; 1426 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1427 } 1428 1429 /* finalize mbuf */ 1430 m->m_pkthdr.rcvif = ifp; 1431 1432 if (ic->ic_state == IEEE80211_S_SCAN) 1433 wpi_fix_channel(ic, m); 1434 1435 #if NBPFILTER > 0 1436 if (sc->sc_drvbpf != NULL) { 1437 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1438 1439 tap->wr_flags = 0; 1440 tap->wr_chan_freq = 1441 htole16(ic->ic_channels[head->chan].ic_freq); 1442 tap->wr_chan_flags = 1443 htole16(ic->ic_channels[head->chan].ic_flags); 1444 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1445 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1446 tap->wr_tsft = tail->tstamp; 1447 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1448 switch (head->rate) { 1449 /* CCK rates */ 1450 case 10: tap->wr_rate = 2; break; 1451 case 20: tap->wr_rate = 4; break; 1452 case 55: tap->wr_rate = 11; break; 1453 case 110: tap->wr_rate = 22; break; 1454 /* OFDM rates */ 1455 case 0xd: tap->wr_rate = 12; break; 1456 case 0xf: tap->wr_rate = 18; break; 1457 case 0x5: tap->wr_rate = 24; break; 1458 case 0x7: tap->wr_rate = 36; break; 1459 case 0x9: tap->wr_rate = 48; break; 1460 case 0xb: tap->wr_rate = 72; break; 1461 case 0x1: tap->wr_rate = 96; break; 1462 case 0x3: tap->wr_rate = 108; break; 1463 /* unknown rate: should not happen */ 1464 default: tap->wr_rate = 0; 1465 } 1466 if (le16toh(head->flags) & 0x4) 1467 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1468 1469 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m); 1470 } 1471 #endif 1472 1473 /* grab a reference to the source node */ 1474 wh = mtod(m, struct ieee80211_frame *); 1475 ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh); 1476 1477 /* send the frame to the 802.11 layer */ 1478 ieee80211_input(ic, m, ni, stat->rssi, 0); 1479 1480 /* release node reference */ 1481 ieee80211_free_node(ni); 1482 } 1483 1484 static void 1485 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1486 { 1487 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1488 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1489 struct wpi_tx_data *txdata = &ring->data[desc->idx]; 1490 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1491 struct wpi_node *wn = (struct wpi_node *)txdata->ni; 1492 1493 DPRINTFN(4, ("tx done: qid=%d idx=%d retries=%d nkill=%d rate=%x " 1494 "duration=%d status=%x\n", desc->qid, desc->idx, stat->ntries, 1495 stat->nkill, stat->rate, le32toh(stat->duration), 1496 le32toh(stat->status))); 1497 1498 /* 1499 * Update rate control statistics for the node. 1500 * XXX we should not count mgmt frames since they're always sent at 1501 * the lowest available bit-rate. 1502 */ 1503 wn->amn.amn_txcnt++; 1504 if (stat->ntries > 0) { 1505 DPRINTFN(3, ("tx intr ntries %d\n", stat->ntries)); 1506 wn->amn.amn_retrycnt++; 1507 } 1508 1509 if ((le32toh(stat->status) & 0xff) != 1) 1510 ifp->if_oerrors++; 1511 else 1512 ifp->if_opackets++; 1513 1514 bus_dmamap_unload(sc->sc_dmat, txdata->map); 1515 m_freem(txdata->m); 1516 txdata->m = NULL; 1517 ieee80211_free_node(txdata->ni); 1518 txdata->ni = NULL; 1519 1520 ring->queued--; 1521 1522 sc->sc_tx_timer = 0; 1523 ifp->if_flags &= ~IFF_OACTIVE; 1524 wpi_start(ifp); 1525 } 1526 1527 static void 1528 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1529 { 1530 struct wpi_tx_ring *ring = &sc->cmdq; 1531 struct wpi_tx_data *data; 1532 1533 if ((desc->qid & 7) != 4) 1534 return; /* not a command ack */ 1535 1536 data = &ring->data[desc->idx]; 1537 1538 /* if the command was mapped in a mbuf, free it */ 1539 if (data->m != NULL) { 1540 bus_dmamap_unload(sc->sc_dmat, data->map); 1541 m_freem(data->m); 1542 data->m = NULL; 1543 } 1544 1545 wakeup(&ring->cmd[desc->idx]); 1546 } 1547 1548 static void 1549 wpi_notif_intr(struct wpi_softc *sc) 1550 { 1551 struct ieee80211com *ic = &sc->sc_ic; 1552 struct ifnet *ifp = ic->ic_ifp; 1553 struct wpi_rx_desc *desc; 1554 struct wpi_rx_data *data; 1555 uint32_t hw; 1556 1557 hw = le32toh(sc->shared->next); 1558 while (sc->rxq.cur != hw) { 1559 data = &sc->rxq.data[sc->rxq.cur]; 1560 1561 desc = mtod(data->m, struct wpi_rx_desc *); 1562 1563 DPRINTFN(4, ("rx notification qid=%x idx=%d flags=%x type=%d " 1564 "len=%d\n", desc->qid, desc->idx, desc->flags, 1565 desc->type, le32toh(desc->len))); 1566 1567 if (!(desc->qid & 0x80)) /* reply to a command */ 1568 wpi_cmd_intr(sc, desc); 1569 1570 switch (desc->type) { 1571 case WPI_RX_DONE: 1572 /* a 802.11 frame was received */ 1573 wpi_rx_intr(sc, desc, data); 1574 break; 1575 1576 case WPI_TX_DONE: 1577 /* a 802.11 frame has been transmitted */ 1578 wpi_tx_intr(sc, desc); 1579 break; 1580 1581 case WPI_UC_READY: 1582 { 1583 struct wpi_ucode_info *uc = 1584 (struct wpi_ucode_info *)(desc + 1); 1585 1586 /* the microcontroller is ready */ 1587 DPRINTF(("microcode alive notification version %x " 1588 "alive %x\n", le32toh(uc->version), 1589 le32toh(uc->valid))); 1590 1591 if (le32toh(uc->valid) != 1) { 1592 aprint_error_dev(sc->sc_dev, 1593 "microcontroller initialization failed\n"); 1594 } 1595 break; 1596 } 1597 case WPI_STATE_CHANGED: 1598 { 1599 uint32_t *status = (uint32_t *)(desc + 1); 1600 1601 /* enabled/disabled notification */ 1602 DPRINTF(("state changed to %x\n", le32toh(*status))); 1603 1604 if (le32toh(*status) & 1) { 1605 /* the radio button has to be pushed */ 1606 aprint_error_dev(sc->sc_dev, "Radio transmitter is off\n"); 1607 /* turn the interface down */ 1608 ifp->if_flags &= ~IFF_UP; 1609 wpi_stop(ifp, 1); 1610 return; /* no further processing */ 1611 } 1612 break; 1613 } 1614 case WPI_START_SCAN: 1615 { 1616 struct wpi_start_scan *scan = 1617 (struct wpi_start_scan *)(desc + 1); 1618 1619 DPRINTFN(2, ("scanning channel %d status %x\n", 1620 scan->chan, le32toh(scan->status))); 1621 1622 /* fix current channel */ 1623 ic->ic_bss->ni_chan = &ic->ic_channels[scan->chan]; 1624 break; 1625 } 1626 case WPI_STOP_SCAN: 1627 { 1628 struct wpi_stop_scan *scan = 1629 (struct wpi_stop_scan *)(desc + 1); 1630 1631 DPRINTF(("scan finished nchan=%d status=%d chan=%d\n", 1632 scan->nchan, scan->status, scan->chan)); 1633 1634 if (scan->status == 1 && scan->chan <= 14) { 1635 /* 1636 * We just finished scanning 802.11g channels, 1637 * start scanning 802.11a ones. 1638 */ 1639 if (wpi_scan(sc, IEEE80211_CHAN_A) == 0) 1640 break; 1641 } 1642 sc->is_scanning = false; 1643 ieee80211_end_scan(ic); 1644 break; 1645 } 1646 } 1647 1648 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1649 } 1650 1651 /* tell the firmware what we have processed */ 1652 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1653 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1654 } 1655 1656 static int 1657 wpi_intr(void *arg) 1658 { 1659 struct wpi_softc *sc = arg; 1660 struct ifnet *ifp = sc->sc_ic.ic_ifp; 1661 uint32_t r; 1662 1663 r = WPI_READ(sc, WPI_INTR); 1664 if (r == 0 || r == 0xffffffff) 1665 return 0; /* not for us */ 1666 1667 DPRINTFN(5, ("interrupt reg %x\n", r)); 1668 1669 /* disable interrupts */ 1670 WPI_WRITE(sc, WPI_MASK, 0); 1671 /* ack interrupts */ 1672 WPI_WRITE(sc, WPI_INTR, r); 1673 1674 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1675 aprint_error_dev(sc->sc_dev, "fatal firmware error\n"); 1676 sc->sc_ic.ic_ifp->if_flags &= ~IFF_UP; 1677 wpi_stop(sc->sc_ic.ic_ifp, 1); 1678 return 1; 1679 } 1680 1681 if (r & WPI_RX_INTR) 1682 wpi_notif_intr(sc); 1683 1684 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1685 wakeup(sc); 1686 1687 /* re-enable interrupts */ 1688 if (ifp->if_flags & IFF_UP) 1689 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1690 1691 return 1; 1692 } 1693 1694 static uint8_t 1695 wpi_plcp_signal(int rate) 1696 { 1697 switch (rate) { 1698 /* CCK rates (returned values are device-dependent) */ 1699 case 2: return 10; 1700 case 4: return 20; 1701 case 11: return 55; 1702 case 22: return 110; 1703 1704 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1705 /* R1-R4, (u)ral is R4-R1 */ 1706 case 12: return 0xd; 1707 case 18: return 0xf; 1708 case 24: return 0x5; 1709 case 36: return 0x7; 1710 case 48: return 0x9; 1711 case 72: return 0xb; 1712 case 96: return 0x1; 1713 case 108: return 0x3; 1714 1715 /* unsupported rates (should not get there) */ 1716 default: return 0; 1717 } 1718 } 1719 1720 /* quickly determine if a given rate is CCK or OFDM */ 1721 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1722 1723 static int 1724 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1725 int ac) 1726 { 1727 struct ieee80211com *ic = &sc->sc_ic; 1728 struct wpi_tx_ring *ring = &sc->txq[ac]; 1729 struct wpi_tx_desc *desc; 1730 struct wpi_tx_data *data; 1731 struct wpi_tx_cmd *cmd; 1732 struct wpi_cmd_data *tx; 1733 struct ieee80211_frame *wh; 1734 struct ieee80211_key *k; 1735 const struct chanAccParams *cap; 1736 struct mbuf *mnew; 1737 int i, error, rate, hdrlen, noack = 0; 1738 1739 desc = &ring->desc[ring->cur]; 1740 data = &ring->data[ring->cur]; 1741 1742 wh = mtod(m0, struct ieee80211_frame *); 1743 1744 if (IEEE80211_QOS_HAS_SEQ(wh)) { 1745 cap = &ic->ic_wme.wme_chanParams; 1746 noack = cap->cap_wmeParams[ac].wmep_noackPolicy; 1747 } 1748 1749 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1750 k = ieee80211_crypto_encap(ic, ni, m0); 1751 if (k == NULL) { 1752 m_freem(m0); 1753 return ENOBUFS; 1754 } 1755 1756 /* packet header may have moved, reset our local pointer */ 1757 wh = mtod(m0, struct ieee80211_frame *); 1758 } 1759 1760 hdrlen = ieee80211_anyhdrsize(wh); 1761 1762 /* pickup a rate */ 1763 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1764 IEEE80211_FC0_TYPE_MGT) { 1765 /* mgmt frames are sent at the lowest available bit-rate */ 1766 rate = ni->ni_rates.rs_rates[0]; 1767 } else { 1768 if (ic->ic_fixed_rate != -1) { 1769 rate = ic->ic_sup_rates[ic->ic_curmode]. 1770 rs_rates[ic->ic_fixed_rate]; 1771 } else 1772 rate = ni->ni_rates.rs_rates[ni->ni_txrate]; 1773 } 1774 rate &= IEEE80211_RATE_VAL; 1775 1776 1777 #if NBPFILTER > 0 1778 if (sc->sc_drvbpf != NULL) { 1779 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1780 1781 tap->wt_flags = 0; 1782 tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq); 1783 tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags); 1784 tap->wt_rate = rate; 1785 tap->wt_hwqueue = ac; 1786 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1787 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1788 1789 bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m0); 1790 } 1791 #endif 1792 1793 cmd = &ring->cmd[ring->cur]; 1794 cmd->code = WPI_CMD_TX_DATA; 1795 cmd->flags = 0; 1796 cmd->qid = ring->qid; 1797 cmd->idx = ring->cur; 1798 1799 tx = (struct wpi_cmd_data *)cmd->data; 1800 tx->flags = 0; 1801 1802 if (!noack && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1803 tx->flags |= htole32(WPI_TX_NEED_ACK); 1804 } else if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > ic->ic_rtsthreshold) 1805 tx->flags |= htole32(WPI_TX_NEED_RTS | WPI_TX_FULL_TXOP); 1806 1807 tx->flags |= htole32(WPI_TX_AUTO_SEQ); 1808 1809 /* retrieve destination node's id */ 1810 tx->id = IEEE80211_IS_MULTICAST(wh->i_addr1) ? WPI_ID_BROADCAST : 1811 WPI_ID_BSS; 1812 1813 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == 1814 IEEE80211_FC0_TYPE_MGT) { 1815 /* tell h/w to set timestamp in probe responses */ 1816 if ((wh->i_fc[0] & 1817 (IEEE80211_FC0_TYPE_MASK | IEEE80211_FC0_SUBTYPE_MASK)) == 1818 (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_RESP)) 1819 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1820 1821 if (((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1822 IEEE80211_FC0_SUBTYPE_ASSOC_REQ) || 1823 ((wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) == 1824 IEEE80211_FC0_SUBTYPE_REASSOC_REQ)) 1825 tx->timeout = htole16(3); 1826 else 1827 tx->timeout = htole16(2); 1828 } else 1829 tx->timeout = htole16(0); 1830 1831 tx->rate = wpi_plcp_signal(rate); 1832 1833 /* be very persistant at sending frames out */ 1834 tx->rts_ntries = 7; 1835 tx->data_ntries = 15; 1836 1837 tx->ofdm_mask = 0xff; 1838 tx->cck_mask = 0xf; 1839 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1840 1841 tx->len = htole16(m0->m_pkthdr.len); 1842 1843 /* save and trim IEEE802.11 header */ 1844 memcpy((uint8_t *)(tx + 1), wh, hdrlen); 1845 m_adj(m0, hdrlen); 1846 1847 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 1848 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1849 if (error != 0 && error != EFBIG) { 1850 aprint_error_dev(sc->sc_dev, "could not map mbuf (error %d)\n", error); 1851 m_freem(m0); 1852 return error; 1853 } 1854 if (error != 0) { 1855 /* too many fragments, linearize */ 1856 MGETHDR(mnew, M_DONTWAIT, MT_DATA); 1857 if (mnew == NULL) { 1858 m_freem(m0); 1859 return ENOMEM; 1860 } 1861 1862 M_COPY_PKTHDR(mnew, m0); 1863 if (m0->m_pkthdr.len > MHLEN) { 1864 MCLGET(mnew, M_DONTWAIT); 1865 if (!(mnew->m_flags & M_EXT)) { 1866 m_freem(m0); 1867 m_freem(mnew); 1868 return ENOMEM; 1869 } 1870 } 1871 1872 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(mnew, void *)); 1873 m_freem(m0); 1874 mnew->m_len = mnew->m_pkthdr.len; 1875 m0 = mnew; 1876 1877 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 1878 BUS_DMA_WRITE | BUS_DMA_NOWAIT); 1879 if (error != 0) { 1880 aprint_error_dev(sc->sc_dev, "could not map mbuf (error %d)\n", 1881 error); 1882 m_freem(m0); 1883 return error; 1884 } 1885 } 1886 1887 data->m = m0; 1888 data->ni = ni; 1889 1890 DPRINTFN(4, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1891 ring->qid, ring->cur, m0->m_pkthdr.len, data->map->dm_nsegs)); 1892 1893 /* first scatter/gather segment is used by the tx data command */ 1894 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1895 (1 + data->map->dm_nsegs) << 24); 1896 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 1897 ring->cur * sizeof (struct wpi_tx_cmd)); 1898 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data) + 1899 ((hdrlen + 3) & ~3)); 1900 1901 for (i = 1; i <= data->map->dm_nsegs; i++) { 1902 desc->segs[i].addr = 1903 htole32(data->map->dm_segs[i - 1].ds_addr); 1904 desc->segs[i].len = 1905 htole32(data->map->dm_segs[i - 1].ds_len); 1906 } 1907 1908 ring->queued++; 1909 1910 /* kick ring */ 1911 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 1912 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 1913 1914 return 0; 1915 } 1916 1917 static void 1918 wpi_start(struct ifnet *ifp) 1919 { 1920 struct wpi_softc *sc = ifp->if_softc; 1921 struct ieee80211com *ic = &sc->sc_ic; 1922 struct ieee80211_node *ni; 1923 struct ether_header *eh; 1924 struct mbuf *m0; 1925 int ac; 1926 1927 /* 1928 * net80211 may still try to send management frames even if the 1929 * IFF_RUNNING flag is not set... 1930 */ 1931 if ((ifp->if_flags & (IFF_RUNNING | IFF_OACTIVE)) != IFF_RUNNING) 1932 return; 1933 1934 for (;;) { 1935 IF_DEQUEUE(&ic->ic_mgtq, m0); 1936 if (m0 != NULL) { 1937 1938 ni = (struct ieee80211_node *)m0->m_pkthdr.rcvif; 1939 m0->m_pkthdr.rcvif = NULL; 1940 1941 /* management frames go into ring 0 */ 1942 if (sc->txq[0].queued > sc->txq[0].count - 8) { 1943 ifp->if_oerrors++; 1944 continue; 1945 } 1946 #if NBPFILTER > 0 1947 if (ic->ic_rawbpf != NULL) 1948 bpf_mtap(ic->ic_rawbpf, m0); 1949 #endif 1950 if (wpi_tx_data(sc, m0, ni, 0) != 0) { 1951 ifp->if_oerrors++; 1952 break; 1953 } 1954 } else { 1955 if (ic->ic_state != IEEE80211_S_RUN) 1956 break; 1957 IFQ_POLL(&ifp->if_snd, m0); 1958 if (m0 == NULL) 1959 break; 1960 1961 if (m0->m_len < sizeof (*eh) && 1962 (m0 = m_pullup(m0, sizeof (*eh))) != NULL) { 1963 ifp->if_oerrors++; 1964 continue; 1965 } 1966 eh = mtod(m0, struct ether_header *); 1967 ni = ieee80211_find_txnode(ic, eh->ether_dhost); 1968 if (ni == NULL) { 1969 m_freem(m0); 1970 ifp->if_oerrors++; 1971 continue; 1972 } 1973 1974 /* classify mbuf so we can find which tx ring to use */ 1975 if (ieee80211_classify(ic, m0, ni) != 0) { 1976 m_freem(m0); 1977 ieee80211_free_node(ni); 1978 ifp->if_oerrors++; 1979 continue; 1980 } 1981 1982 /* no QoS encapsulation for EAPOL frames */ 1983 ac = (eh->ether_type != htons(ETHERTYPE_PAE)) ? 1984 M_WME_GETAC(m0) : WME_AC_BE; 1985 1986 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 1987 /* there is no place left in this ring */ 1988 ifp->if_flags |= IFF_OACTIVE; 1989 break; 1990 } 1991 IFQ_DEQUEUE(&ifp->if_snd, m0); 1992 #if NBPFILTER > 0 1993 if (ifp->if_bpf != NULL) 1994 bpf_mtap(ifp->if_bpf, m0); 1995 #endif 1996 m0 = ieee80211_encap(ic, m0, ni); 1997 if (m0 == NULL) { 1998 ieee80211_free_node(ni); 1999 ifp->if_oerrors++; 2000 continue; 2001 } 2002 #if NBPFILTER > 0 2003 if (ic->ic_rawbpf != NULL) 2004 bpf_mtap(ic->ic_rawbpf, m0); 2005 #endif 2006 if (wpi_tx_data(sc, m0, ni, ac) != 0) { 2007 ieee80211_free_node(ni); 2008 ifp->if_oerrors++; 2009 break; 2010 } 2011 } 2012 2013 sc->sc_tx_timer = 5; 2014 ifp->if_timer = 1; 2015 } 2016 } 2017 2018 static void 2019 wpi_watchdog(struct ifnet *ifp) 2020 { 2021 struct wpi_softc *sc = ifp->if_softc; 2022 2023 ifp->if_timer = 0; 2024 2025 if (sc->sc_tx_timer > 0) { 2026 if (--sc->sc_tx_timer == 0) { 2027 aprint_error_dev(sc->sc_dev, "device timeout\n"); 2028 ifp->if_oerrors++; 2029 ifp->if_flags &= ~IFF_UP; 2030 wpi_stop(ifp, 1); 2031 return; 2032 } 2033 ifp->if_timer = 1; 2034 } 2035 2036 ieee80211_watchdog(&sc->sc_ic); 2037 } 2038 2039 static int 2040 wpi_ioctl(struct ifnet *ifp, u_long cmd, void *data) 2041 { 2042 #define IS_RUNNING(ifp) \ 2043 ((ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) 2044 2045 struct wpi_softc *sc = ifp->if_softc; 2046 struct ieee80211com *ic = &sc->sc_ic; 2047 int s, error = 0; 2048 2049 s = splnet(); 2050 2051 switch (cmd) { 2052 case SIOCSIFFLAGS: 2053 if (ifp->if_flags & IFF_UP) { 2054 if (!(ifp->if_flags & IFF_RUNNING)) 2055 wpi_init(ifp); 2056 } else { 2057 if (ifp->if_flags & IFF_RUNNING) 2058 wpi_stop(ifp, 1); 2059 } 2060 break; 2061 2062 case SIOCADDMULTI: 2063 case SIOCDELMULTI: 2064 /* XXX no h/w multicast filter? --dyoung */ 2065 if ((error = ether_ioctl(ifp, cmd, data)) == ENETRESET) { 2066 /* setup multicast filter, etc */ 2067 error = 0; 2068 } 2069 break; 2070 2071 default: 2072 error = ieee80211_ioctl(ic, cmd, data); 2073 } 2074 2075 if (error == ENETRESET) { 2076 if (IS_RUNNING(ifp) && 2077 (ic->ic_roaming != IEEE80211_ROAMING_MANUAL)) 2078 wpi_init(ifp); 2079 error = 0; 2080 } 2081 2082 splx(s); 2083 return error; 2084 2085 #undef IS_RUNNING 2086 } 2087 2088 /* 2089 * Extract various information from EEPROM. 2090 */ 2091 static void 2092 wpi_read_eeprom(struct wpi_softc *sc) 2093 { 2094 struct ieee80211com *ic = &sc->sc_ic; 2095 char domain[4]; 2096 int i; 2097 2098 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap, 1); 2099 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev, 2); 2100 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2101 2102 DPRINTF(("cap=%x rev=%x type=%x\n", sc->cap, le16toh(sc->rev), 2103 sc->type)); 2104 2105 /* read and print regulatory domain */ 2106 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, domain, 4); 2107 aprint_normal(", %.4s", domain); 2108 2109 /* read and print MAC address */ 2110 wpi_read_prom_data(sc, WPI_EEPROM_MAC, ic->ic_myaddr, 6); 2111 aprint_normal(", address %s\n", ether_sprintf(ic->ic_myaddr)); 2112 2113 /* read the list of authorized channels */ 2114 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2115 wpi_read_eeprom_channels(sc, i); 2116 2117 /* read the list of power groups */ 2118 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2119 wpi_read_eeprom_group(sc, i); 2120 } 2121 2122 static void 2123 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 2124 { 2125 struct ieee80211com *ic = &sc->sc_ic; 2126 const struct wpi_chan_band *band = &wpi_bands[n]; 2127 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 2128 int chan, i; 2129 2130 wpi_read_prom_data(sc, band->addr, channels, 2131 band->nchan * sizeof (struct wpi_eeprom_chan)); 2132 2133 for (i = 0; i < band->nchan; i++) { 2134 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) 2135 continue; 2136 2137 chan = band->chan[i]; 2138 2139 if (n == 0) { /* 2GHz band */ 2140 ic->ic_channels[chan].ic_freq = 2141 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_2GHZ); 2142 ic->ic_channels[chan].ic_flags = 2143 IEEE80211_CHAN_CCK | IEEE80211_CHAN_OFDM | 2144 IEEE80211_CHAN_DYN | IEEE80211_CHAN_2GHZ; 2145 2146 } else { /* 5GHz band */ 2147 /* 2148 * Some 3945abg adapters support channels 7, 8, 11 2149 * and 12 in the 2GHz *and* 5GHz bands. 2150 * Because of limitations in our net80211(9) stack, 2151 * we can't support these channels in 5GHz band. 2152 */ 2153 if (chan <= 14) 2154 continue; 2155 2156 ic->ic_channels[chan].ic_freq = 2157 ieee80211_ieee2mhz(chan, IEEE80211_CHAN_5GHZ); 2158 ic->ic_channels[chan].ic_flags = IEEE80211_CHAN_A; 2159 } 2160 2161 /* is active scan allowed on this channel? */ 2162 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 2163 ic->ic_channels[chan].ic_flags |= 2164 IEEE80211_CHAN_PASSIVE; 2165 } 2166 2167 /* save maximum allowed power for this channel */ 2168 sc->maxpwr[chan] = channels[i].maxpwr; 2169 2170 DPRINTF(("adding chan %d flags=0x%x maxpwr=%d\n", 2171 chan, channels[i].flags, sc->maxpwr[chan])); 2172 } 2173 } 2174 2175 static void 2176 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 2177 { 2178 struct wpi_power_group *group = &sc->groups[n]; 2179 struct wpi_eeprom_group rgroup; 2180 int i; 2181 2182 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 2183 sizeof rgroup); 2184 2185 /* save power group information */ 2186 group->chan = rgroup.chan; 2187 group->maxpwr = rgroup.maxpwr; 2188 /* temperature at which the samples were taken */ 2189 group->temp = (int16_t)le16toh(rgroup.temp); 2190 2191 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 2192 group->chan, group->maxpwr, group->temp)); 2193 2194 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 2195 group->samples[i].index = rgroup.samples[i].index; 2196 group->samples[i].power = rgroup.samples[i].power; 2197 2198 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 2199 group->samples[i].index, group->samples[i].power)); 2200 } 2201 } 2202 2203 /* 2204 * Send a command to the firmware. 2205 */ 2206 static int 2207 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2208 { 2209 struct wpi_tx_ring *ring = &sc->cmdq; 2210 struct wpi_tx_desc *desc; 2211 struct wpi_tx_cmd *cmd; 2212 2213 KASSERT(size <= sizeof cmd->data); 2214 2215 desc = &ring->desc[ring->cur]; 2216 cmd = &ring->cmd[ring->cur]; 2217 2218 cmd->code = code; 2219 cmd->flags = 0; 2220 cmd->qid = ring->qid; 2221 cmd->idx = ring->cur; 2222 memcpy(cmd->data, buf, size); 2223 2224 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2225 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2226 ring->cur * sizeof (struct wpi_tx_cmd)); 2227 desc->segs[0].len = htole32(4 + size); 2228 2229 /* kick cmd ring */ 2230 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2231 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2232 2233 return async ? 0 : tsleep(cmd, PCATCH, "wpicmd", hz); 2234 } 2235 2236 static int 2237 wpi_wme_update(struct ieee80211com *ic) 2238 { 2239 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2240 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2241 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2242 const struct wmeParams *wmep; 2243 struct wpi_wme_setup wme; 2244 int ac; 2245 2246 /* don't override default WME values if WME is not actually enabled */ 2247 if (!(ic->ic_flags & IEEE80211_F_WME)) 2248 return 0; 2249 2250 wme.flags = 0; 2251 for (ac = 0; ac < WME_NUM_AC; ac++) { 2252 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2253 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2254 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2255 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2256 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2257 2258 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2259 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2260 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2261 } 2262 2263 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2264 #undef WPI_USEC 2265 #undef WPI_EXP2 2266 } 2267 2268 /* 2269 * Configure h/w multi-rate retries. 2270 */ 2271 static int 2272 wpi_mrr_setup(struct wpi_softc *sc) 2273 { 2274 struct ieee80211com *ic = &sc->sc_ic; 2275 struct wpi_mrr_setup mrr; 2276 int i, error; 2277 2278 /* CCK rates (not used with 802.11a) */ 2279 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2280 mrr.rates[i].flags = 0; 2281 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2282 /* fallback to the immediate lower CCK rate (if any) */ 2283 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2284 /* try one time at this rate before falling back to "next" */ 2285 mrr.rates[i].ntries = 1; 2286 } 2287 2288 /* OFDM rates (not used with 802.11b) */ 2289 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2290 mrr.rates[i].flags = 0; 2291 mrr.rates[i].plcp = wpi_ridx_to_plcp[i]; 2292 /* fallback to the immediate lower rate (if any) */ 2293 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2294 mrr.rates[i].next = (i == WPI_OFDM6) ? 2295 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2296 WPI_OFDM6 : WPI_CCK2) : 2297 i - 1; 2298 /* try one time at this rate before falling back to "next" */ 2299 mrr.rates[i].ntries = 1; 2300 } 2301 2302 /* setup MRR for control frames */ 2303 mrr.which = htole32(WPI_MRR_CTL); 2304 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2305 if (error != 0) { 2306 aprint_error_dev(sc->sc_dev, "could not setup MRR for control frames\n"); 2307 return error; 2308 } 2309 2310 /* setup MRR for data frames */ 2311 mrr.which = htole32(WPI_MRR_DATA); 2312 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2313 if (error != 0) { 2314 aprint_error_dev(sc->sc_dev, "could not setup MRR for data frames\n"); 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_dev(sc->sc_dev, "could not enable TSF\n"); 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_dev(sc->sc_dev, "could not allocate beacon frame\n"); 2503 return ENOMEM; 2504 } 2505 2506 cmd = &ring->cmd[ring->cur]; 2507 cmd->code = WPI_CMD_SET_BEACON; 2508 cmd->flags = 0; 2509 cmd->qid = ring->qid; 2510 cmd->idx = ring->cur; 2511 2512 bcn = (struct wpi_cmd_beacon *)cmd->data; 2513 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2514 bcn->id = WPI_ID_BROADCAST; 2515 bcn->ofdm_mask = 0xff; 2516 bcn->cck_mask = 0x0f; 2517 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2518 bcn->len = htole16(m0->m_pkthdr.len); 2519 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2520 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2521 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2522 2523 /* save and trim IEEE802.11 header */ 2524 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (void *)&bcn->wh); 2525 m_adj(m0, sizeof (struct ieee80211_frame)); 2526 2527 /* assume beacon frame is contiguous */ 2528 error = bus_dmamap_load_mbuf(sc->sc_dmat, data->map, m0, 2529 BUS_DMA_READ | BUS_DMA_NOWAIT); 2530 if (error) { 2531 aprint_error_dev(sc->sc_dev, "could not map beacon\n"); 2532 m_freem(m0); 2533 return error; 2534 } 2535 2536 data->m = m0; 2537 2538 /* first scatter/gather segment is used by the beacon command */ 2539 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2540 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2541 ring->cur * sizeof (struct wpi_tx_cmd)); 2542 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2543 desc->segs[1].addr = htole32(data->map->dm_segs[0].ds_addr); 2544 desc->segs[1].len = htole32(data->map->dm_segs[0].ds_len); 2545 2546 /* kick cmd ring */ 2547 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2548 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2549 2550 return 0; 2551 } 2552 2553 static int 2554 wpi_auth(struct wpi_softc *sc) 2555 { 2556 struct ieee80211com *ic = &sc->sc_ic; 2557 struct ieee80211_node *ni = ic->ic_bss; 2558 struct wpi_node_info node; 2559 int error; 2560 2561 /* update adapter's configuration */ 2562 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2563 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2564 sc->config.flags = htole32(WPI_CONFIG_TSF); 2565 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2566 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2567 WPI_CONFIG_24GHZ); 2568 } 2569 switch (ic->ic_curmode) { 2570 case IEEE80211_MODE_11A: 2571 sc->config.cck_mask = 0; 2572 sc->config.ofdm_mask = 0x15; 2573 break; 2574 case IEEE80211_MODE_11B: 2575 sc->config.cck_mask = 0x03; 2576 sc->config.ofdm_mask = 0; 2577 break; 2578 default: /* assume 802.11b/g */ 2579 sc->config.cck_mask = 0x0f; 2580 sc->config.ofdm_mask = 0x15; 2581 } 2582 2583 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2584 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2585 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2586 sizeof (struct wpi_config), 1); 2587 if (error != 0) { 2588 aprint_error_dev(sc->sc_dev, "could not configure\n"); 2589 return error; 2590 } 2591 2592 /* configuration has changed, set Tx power accordingly */ 2593 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2594 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 2595 return error; 2596 } 2597 2598 /* add default node */ 2599 memset(&node, 0, sizeof node); 2600 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2601 node.id = WPI_ID_BSS; 2602 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2603 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2604 node.action = htole32(WPI_ACTION_SET_RATE); 2605 node.antenna = WPI_ANTENNA_BOTH; 2606 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2607 if (error != 0) { 2608 aprint_error_dev(sc->sc_dev, "could not add BSS node\n"); 2609 return error; 2610 } 2611 2612 return 0; 2613 } 2614 2615 /* 2616 * Send a scan request to the firmware. Since this command is huge, we map it 2617 * into a mbuf instead of using the pre-allocated set of commands. 2618 */ 2619 static int 2620 wpi_scan(struct wpi_softc *sc, uint16_t flags) 2621 { 2622 struct ieee80211com *ic = &sc->sc_ic; 2623 struct wpi_tx_ring *ring = &sc->cmdq; 2624 struct wpi_tx_desc *desc; 2625 struct wpi_tx_data *data; 2626 struct wpi_tx_cmd *cmd; 2627 struct wpi_scan_hdr *hdr; 2628 struct wpi_scan_chan *chan; 2629 struct ieee80211_frame *wh; 2630 struct ieee80211_rateset *rs; 2631 struct ieee80211_channel *c; 2632 enum ieee80211_phymode mode; 2633 uint8_t *frm; 2634 int nrates, pktlen, error; 2635 2636 desc = &ring->desc[ring->cur]; 2637 data = &ring->data[ring->cur]; 2638 2639 MGETHDR(data->m, M_DONTWAIT, MT_DATA); 2640 if (data->m == NULL) { 2641 aprint_error_dev(sc->sc_dev, 2642 "could not allocate mbuf for scan command\n"); 2643 return ENOMEM; 2644 } 2645 2646 MCLGET(data->m, M_DONTWAIT); 2647 if (!(data->m->m_flags & M_EXT)) { 2648 m_freem(data->m); 2649 data->m = NULL; 2650 aprint_error_dev(sc->sc_dev, 2651 "could not allocate mbuf for scan command\n"); 2652 return ENOMEM; 2653 } 2654 2655 cmd = mtod(data->m, struct wpi_tx_cmd *); 2656 cmd->code = WPI_CMD_SCAN; 2657 cmd->flags = 0; 2658 cmd->qid = ring->qid; 2659 cmd->idx = ring->cur; 2660 2661 hdr = (struct wpi_scan_hdr *)cmd->data; 2662 memset(hdr, 0, sizeof (struct wpi_scan_hdr)); 2663 hdr->txflags = htole32(WPI_TX_AUTO_SEQ); 2664 hdr->id = WPI_ID_BROADCAST; 2665 hdr->lifetime = htole32(WPI_LIFETIME_INFINITE); 2666 2667 /* 2668 * Move to the next channel if no packets are received within 5 msecs 2669 * after sending the probe request (this helps to reduce the duration 2670 * of active scans). 2671 */ 2672 hdr->quiet = htole16(5); /* timeout in milliseconds */ 2673 hdr->plcp_threshold = htole16(1); /* min # of packets */ 2674 2675 if (flags & IEEE80211_CHAN_A) { 2676 hdr->crc_threshold = htole16(1); 2677 /* send probe requests at 6Mbps */ 2678 hdr->rate = wpi_plcp_signal(12); 2679 } else { 2680 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2681 /* send probe requests at 1Mbps */ 2682 hdr->rate = wpi_plcp_signal(2); 2683 } 2684 2685 /* for directed scans, firmware inserts the essid IE itself */ 2686 hdr->essid[0].id = IEEE80211_ELEMID_SSID; 2687 hdr->essid[0].len = ic->ic_des_esslen; 2688 memcpy(hdr->essid[0].data, ic->ic_des_essid, ic->ic_des_esslen); 2689 2690 /* 2691 * Build a probe request frame. Most of the following code is a 2692 * copy & paste of what is done in net80211. 2693 */ 2694 wh = (struct ieee80211_frame *)(hdr + 1); 2695 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2696 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2697 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2698 IEEE80211_ADDR_COPY(wh->i_addr1, etherbroadcastaddr); 2699 IEEE80211_ADDR_COPY(wh->i_addr2, ic->ic_myaddr); 2700 IEEE80211_ADDR_COPY(wh->i_addr3, etherbroadcastaddr); 2701 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2702 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2703 2704 frm = (uint8_t *)(wh + 1); 2705 2706 /* add empty essid IE (firmware generates it for directed scans) */ 2707 *frm++ = IEEE80211_ELEMID_SSID; 2708 *frm++ = 0; 2709 2710 mode = ieee80211_chan2mode(ic, ic->ic_ibss_chan); 2711 rs = &ic->ic_sup_rates[mode]; 2712 2713 /* add supported rates IE */ 2714 *frm++ = IEEE80211_ELEMID_RATES; 2715 nrates = rs->rs_nrates; 2716 if (nrates > IEEE80211_RATE_SIZE) 2717 nrates = IEEE80211_RATE_SIZE; 2718 *frm++ = nrates; 2719 memcpy(frm, rs->rs_rates, nrates); 2720 frm += nrates; 2721 2722 /* add supported xrates IE */ 2723 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2724 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2725 *frm++ = IEEE80211_ELEMID_XRATES; 2726 *frm++ = nrates; 2727 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2728 frm += nrates; 2729 } 2730 2731 /* setup length of probe request */ 2732 hdr->paylen = htole16(frm - (uint8_t *)wh); 2733 2734 chan = (struct wpi_scan_chan *)frm; 2735 for (c = &ic->ic_channels[1]; 2736 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2737 if ((c->ic_flags & flags) != flags) 2738 continue; 2739 2740 chan->chan = ieee80211_chan2ieee(ic, c); 2741 chan->flags = 0; 2742 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2743 chan->flags |= WPI_CHAN_ACTIVE; 2744 if (ic->ic_des_esslen != 0) 2745 chan->flags |= WPI_CHAN_DIRECT; 2746 } 2747 chan->dsp_gain = 0x6e; 2748 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2749 chan->rf_gain = 0x3b; 2750 chan->active = htole16(10); 2751 chan->passive = htole16(110); 2752 } else { 2753 chan->rf_gain = 0x28; 2754 chan->active = htole16(20); 2755 chan->passive = htole16(120); 2756 } 2757 hdr->nchan++; 2758 chan++; 2759 2760 frm += sizeof (struct wpi_scan_chan); 2761 } 2762 hdr->len = htole16(frm - (uint8_t *)hdr); 2763 pktlen = frm - (uint8_t *)cmd; 2764 2765 error = bus_dmamap_load(sc->sc_dmat, data->map, cmd, pktlen, 2766 NULL, BUS_DMA_NOWAIT); 2767 if (error) { 2768 aprint_error_dev(sc->sc_dev, "could not map scan command\n"); 2769 m_freem(data->m); 2770 data->m = NULL; 2771 return error; 2772 } 2773 2774 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2775 desc->segs[0].addr = htole32(data->map->dm_segs[0].ds_addr); 2776 desc->segs[0].len = htole32(data->map->dm_segs[0].ds_len); 2777 2778 /* kick cmd ring */ 2779 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2780 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2781 2782 return 0; /* will be notified async. of failure/success */ 2783 } 2784 2785 static int 2786 wpi_config(struct wpi_softc *sc) 2787 { 2788 struct ieee80211com *ic = &sc->sc_ic; 2789 struct ifnet *ifp = ic->ic_ifp; 2790 struct wpi_power power; 2791 struct wpi_bluetooth bluetooth; 2792 struct wpi_node_info node; 2793 int error; 2794 2795 memset(&power, 0, sizeof power); 2796 power.flags = htole32(WPI_POWER_CAM | 0x8); 2797 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2798 if (error != 0) { 2799 aprint_error_dev(sc->sc_dev, "could not set power mode\n"); 2800 return error; 2801 } 2802 2803 /* configure bluetooth coexistence */ 2804 memset(&bluetooth, 0, sizeof bluetooth); 2805 bluetooth.flags = 3; 2806 bluetooth.lead = 0xaa; 2807 bluetooth.kill = 1; 2808 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2809 0); 2810 if (error != 0) { 2811 aprint_error_dev(sc->sc_dev, 2812 "could not configure bluetooth coexistence\n"); 2813 return error; 2814 } 2815 2816 /* configure adapter */ 2817 memset(&sc->config, 0, sizeof (struct wpi_config)); 2818 IEEE80211_ADDR_COPY(ic->ic_myaddr, CLLADDR(ifp->if_sadl)); 2819 IEEE80211_ADDR_COPY(sc->config.myaddr, ic->ic_myaddr); 2820 /*set default channel*/ 2821 sc->config.chan = ieee80211_chan2ieee(ic, ic->ic_ibss_chan); 2822 sc->config.flags = htole32(WPI_CONFIG_TSF); 2823 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_ibss_chan)) { 2824 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2825 WPI_CONFIG_24GHZ); 2826 } 2827 sc->config.filter = 0; 2828 switch (ic->ic_opmode) { 2829 case IEEE80211_M_STA: 2830 sc->config.mode = WPI_MODE_STA; 2831 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2832 break; 2833 case IEEE80211_M_IBSS: 2834 case IEEE80211_M_AHDEMO: 2835 sc->config.mode = WPI_MODE_IBSS; 2836 break; 2837 case IEEE80211_M_HOSTAP: 2838 sc->config.mode = WPI_MODE_HOSTAP; 2839 break; 2840 case IEEE80211_M_MONITOR: 2841 sc->config.mode = WPI_MODE_MONITOR; 2842 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2843 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2844 break; 2845 } 2846 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2847 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2848 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2849 sizeof (struct wpi_config), 0); 2850 if (error != 0) { 2851 aprint_error_dev(sc->sc_dev, "configure command failed\n"); 2852 return error; 2853 } 2854 2855 /* configuration has changed, set Tx power accordingly */ 2856 if ((error = wpi_set_txpower(sc, ic->ic_ibss_chan, 0)) != 0) { 2857 aprint_error_dev(sc->sc_dev, "could not set Tx power\n"); 2858 return error; 2859 } 2860 2861 /* add broadcast node */ 2862 memset(&node, 0, sizeof node); 2863 IEEE80211_ADDR_COPY(node.bssid, etherbroadcastaddr); 2864 node.id = WPI_ID_BROADCAST; 2865 node.rate = wpi_plcp_signal(2); 2866 node.action = htole32(WPI_ACTION_SET_RATE); 2867 node.antenna = WPI_ANTENNA_BOTH; 2868 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2869 if (error != 0) { 2870 aprint_error_dev(sc->sc_dev, "could not add broadcast node\n"); 2871 return error; 2872 } 2873 2874 if ((error = wpi_mrr_setup(sc)) != 0) { 2875 aprint_error_dev(sc->sc_dev, "could not setup MRR\n"); 2876 return error; 2877 } 2878 2879 return 0; 2880 } 2881 2882 static void 2883 wpi_stop_master(struct wpi_softc *sc) 2884 { 2885 uint32_t tmp; 2886 int ntries; 2887 2888 tmp = WPI_READ(sc, WPI_RESET); 2889 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER); 2890 2891 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2892 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2893 return; /* already asleep */ 2894 2895 for (ntries = 0; ntries < 100; ntries++) { 2896 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2897 break; 2898 DELAY(10); 2899 } 2900 if (ntries == 100) { 2901 aprint_error_dev(sc->sc_dev, "timeout waiting for master\n"); 2902 } 2903 } 2904 2905 static int 2906 wpi_power_up(struct wpi_softc *sc) 2907 { 2908 uint32_t tmp; 2909 int ntries; 2910 2911 wpi_mem_lock(sc); 2912 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2913 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2914 wpi_mem_unlock(sc); 2915 2916 for (ntries = 0; ntries < 5000; ntries++) { 2917 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 2918 break; 2919 DELAY(10); 2920 } 2921 if (ntries == 5000) { 2922 aprint_error_dev(sc->sc_dev, "timeout waiting for NIC to power up\n"); 2923 return ETIMEDOUT; 2924 } 2925 return 0; 2926 } 2927 2928 static int 2929 wpi_reset(struct wpi_softc *sc) 2930 { 2931 uint32_t tmp; 2932 int ntries; 2933 2934 /* clear any pending interrupts */ 2935 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 2936 2937 tmp = WPI_READ(sc, WPI_PLL_CTL); 2938 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 2939 2940 tmp = WPI_READ(sc, WPI_CHICKEN); 2941 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 2942 2943 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2944 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 2945 2946 /* wait for clock stabilization */ 2947 for (ntries = 0; ntries < 1000; ntries++) { 2948 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 2949 break; 2950 DELAY(10); 2951 } 2952 if (ntries == 1000) { 2953 aprint_error_dev(sc->sc_dev, 2954 "timeout waiting for clock stabilization\n"); 2955 return ETIMEDOUT; 2956 } 2957 2958 /* initialize EEPROM */ 2959 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 2960 if ((tmp & WPI_EEPROM_VERSION) == 0) { 2961 aprint_error_dev(sc->sc_dev, "EEPROM not found\n"); 2962 return EIO; 2963 } 2964 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 2965 2966 return 0; 2967 } 2968 2969 static void 2970 wpi_hw_config(struct wpi_softc *sc) 2971 { 2972 uint32_t rev, hw; 2973 2974 /* voodoo from the reference driver */ 2975 hw = WPI_READ(sc, WPI_HWCONFIG); 2976 2977 rev = pci_conf_read(sc->sc_pct, sc->sc_pcitag, PCI_CLASS_REG); 2978 rev = PCI_REVISION(rev); 2979 if ((rev & 0xc0) == 0x40) 2980 hw |= WPI_HW_ALM_MB; 2981 else if (!(rev & 0x80)) 2982 hw |= WPI_HW_ALM_MM; 2983 2984 if (sc->cap == 0x80) 2985 hw |= WPI_HW_SKU_MRC; 2986 2987 hw &= ~WPI_HW_REV_D; 2988 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 2989 hw |= WPI_HW_REV_D; 2990 2991 if (sc->type > 1) 2992 hw |= WPI_HW_TYPE_B; 2993 2994 DPRINTF(("setting h/w config %x\n", hw)); 2995 WPI_WRITE(sc, WPI_HWCONFIG, hw); 2996 } 2997 2998 static int 2999 wpi_init(struct ifnet *ifp) 3000 { 3001 struct wpi_softc *sc = ifp->if_softc; 3002 struct ieee80211com *ic = &sc->sc_ic; 3003 uint32_t tmp; 3004 int qid, ntries, error; 3005 3006 wpi_stop(ifp,1); 3007 (void)wpi_reset(sc); 3008 3009 wpi_mem_lock(sc); 3010 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3011 DELAY(20); 3012 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3013 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3014 wpi_mem_unlock(sc); 3015 3016 (void)wpi_power_up(sc); 3017 wpi_hw_config(sc); 3018 3019 /* init Rx ring */ 3020 wpi_mem_lock(sc); 3021 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3022 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3023 offsetof(struct wpi_shared, next)); 3024 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3025 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3026 wpi_mem_unlock(sc); 3027 3028 /* init Tx rings */ 3029 wpi_mem_lock(sc); 3030 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3031 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3032 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3033 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3034 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3035 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3036 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3037 3038 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3039 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3040 3041 for (qid = 0; qid < 6; qid++) { 3042 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3043 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3044 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3045 } 3046 wpi_mem_unlock(sc); 3047 3048 /* clear "radio off" and "disable command" bits (reversed logic) */ 3049 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3050 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3051 3052 /* clear any pending interrupts */ 3053 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3054 /* enable interrupts */ 3055 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3056 3057 /* not sure why/if this is necessary... */ 3058 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3059 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3060 3061 if ((error = wpi_load_firmware(sc)) != 0) { 3062 aprint_error_dev(sc->sc_dev, "could not load firmware\n"); 3063 goto fail1; 3064 } 3065 3066 /* wait for thermal sensors to calibrate */ 3067 for (ntries = 0; ntries < 1000; ntries++) { 3068 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3069 break; 3070 DELAY(10); 3071 } 3072 if (ntries == 1000) { 3073 aprint_error_dev(sc->sc_dev, 3074 "timeout waiting for thermal sensors calibration\n"); 3075 error = ETIMEDOUT; 3076 goto fail1; 3077 } 3078 3079 DPRINTF(("temperature %d\n", sc->temp)); 3080 3081 if ((error = wpi_config(sc)) != 0) { 3082 aprint_error_dev(sc->sc_dev, "could not configure device\n"); 3083 goto fail1; 3084 } 3085 3086 ifp->if_flags &= ~IFF_OACTIVE; 3087 ifp->if_flags |= IFF_RUNNING; 3088 3089 if (ic->ic_opmode != IEEE80211_M_MONITOR) { 3090 if (ic->ic_roaming != IEEE80211_ROAMING_MANUAL) 3091 ieee80211_new_state(ic, IEEE80211_S_SCAN, -1); 3092 } 3093 else 3094 ieee80211_new_state(ic, IEEE80211_S_RUN, -1); 3095 3096 return 0; 3097 3098 fail1: wpi_stop(ifp, 1); 3099 return error; 3100 } 3101 3102 3103 static void 3104 wpi_stop(struct ifnet *ifp, int disable) 3105 { 3106 struct wpi_softc *sc = ifp->if_softc; 3107 struct ieee80211com *ic = &sc->sc_ic; 3108 uint32_t tmp; 3109 int ac; 3110 3111 ifp->if_timer = sc->sc_tx_timer = 0; 3112 ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE); 3113 3114 ieee80211_new_state(ic, IEEE80211_S_INIT, -1); 3115 3116 /* disable interrupts */ 3117 WPI_WRITE(sc, WPI_MASK, 0); 3118 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3119 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3120 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3121 3122 wpi_mem_lock(sc); 3123 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3124 wpi_mem_unlock(sc); 3125 3126 /* reset all Tx rings */ 3127 for (ac = 0; ac < 4; ac++) 3128 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3129 wpi_reset_tx_ring(sc, &sc->cmdq); 3130 3131 /* reset Rx ring */ 3132 wpi_reset_rx_ring(sc, &sc->rxq); 3133 3134 wpi_mem_lock(sc); 3135 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3136 wpi_mem_unlock(sc); 3137 3138 DELAY(5); 3139 3140 wpi_stop_master(sc); 3141 3142 tmp = WPI_READ(sc, WPI_RESET); 3143 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3144 } 3145