Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/wpi/if_wpi.c
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1 /*- 2 * Copyright (c) 2006,2007 3 * Damien Bergamini <damien.bergamini@free.fr> 4 * Benjamin Close <Benjamin.Close@clearchain.com> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #define VERSION "20071127" 20 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD$"); 23 24 /* 25 * Driver for Intel PRO/Wireless 3945ABG 802.11 network adapters. 26 * 27 * The 3945ABG network adapter doesn't use traditional hardware as 28 * many other adaptors do. Instead at run time the eeprom is set into a known 29 * state and told to load boot firmware. The boot firmware loads an init and a 30 * main binary firmware image into SRAM on the card via DMA. 31 * Once the firmware is loaded, the driver/hw then 32 * communicate by way of circular dma rings via the SRAM to the firmware. 33 * 34 * There is 6 memory rings. 1 command ring, 1 rx data ring & 4 tx data rings. 35 * The 4 tx data rings allow for prioritization QoS. 36 * 37 * The rx data ring consists of 32 dma buffers. Two registers are used to 38 * indicate where in the ring the driver and the firmware are up to. The 39 * driver sets the initial read index (reg1) and the initial write index (reg2), 40 * the firmware updates the read index (reg1) on rx of a packet and fires an 41 * interrupt. The driver then processes the buffers starting at reg1 indicating 42 * to the firmware which buffers have been accessed by updating reg2. At the 43 * same time allocating new memory for the processed buffer. 44 * 45 * A similar thing happens with the tx rings. The difference is the firmware 46 * stop processing buffers once the queue is full and until confirmation 47 * of a successful transmition (tx_intr) has occurred. 48 * 49 * The command ring operates in the same manner as the tx queues. 50 * 51 * All communication direct to the card (ie eeprom) is classed as Stage1 52 * communication 53 * 54 * All communication via the firmware to the card is classed as State2. 55 * The firmware consists of 2 parts. A bootstrap firmware and a runtime 56 * firmware. The bootstrap firmware and runtime firmware are loaded 57 * from host memory via dma to the card then told to execute. From this point 58 * on the majority of communications between the driver and the card goes 59 * via the firmware. 60 */ 61 62 #include <sys/param.h> 63 #include <sys/sysctl.h> 64 #include <sys/sockio.h> 65 #include <sys/mbuf.h> 66 #include <sys/kernel.h> 67 #include <sys/socket.h> 68 #include <sys/systm.h> 69 #include <sys/malloc.h> 70 #include <sys/queue.h> 71 #include <sys/taskqueue.h> 72 #include <sys/module.h> 73 #include <sys/bus.h> 74 #include <sys/endian.h> 75 #include <sys/linker.h> 76 #include <sys/firmware.h> 77 78 #include <machine/bus.h> 79 #include <machine/resource.h> 80 #include <sys/rman.h> 81 82 #include <dev/pci/pcireg.h> 83 #include <dev/pci/pcivar.h> 84 85 #include <net/bpf.h> 86 #include <net/if.h> 87 #include <net/if_arp.h> 88 #include <net/ethernet.h> 89 #include <net/if_dl.h> 90 #include <net/if_media.h> 91 #include <net/if_types.h> 92 93 #include <net80211/ieee80211_var.h> 94 #include <net80211/ieee80211_radiotap.h> 95 #include <net80211/ieee80211_regdomain.h> 96 #include <net80211/ieee80211_ratectl.h> 97 98 #include <netinet/in.h> 99 #include <netinet/in_systm.h> 100 #include <netinet/in_var.h> 101 #include <netinet/ip.h> 102 #include <netinet/if_ether.h> 103 104 #include <dev/wpi/if_wpireg.h> 105 #include <dev/wpi/if_wpivar.h> 106 107 #define WPI_DEBUG 108 109 #ifdef WPI_DEBUG 110 #define DPRINTF(x) do { if (wpi_debug != 0) printf x; } while (0) 111 #define DPRINTFN(n, x) do { if (wpi_debug & n) printf x; } while (0) 112 #define WPI_DEBUG_SET (wpi_debug != 0) 113 114 enum { 115 WPI_DEBUG_UNUSED = 0x00000001, /* Unused */ 116 WPI_DEBUG_HW = 0x00000002, /* Stage 1 (eeprom) debugging */ 117 WPI_DEBUG_TX = 0x00000004, /* Stage 2 TX intrp debugging*/ 118 WPI_DEBUG_RX = 0x00000008, /* Stage 2 RX intrp debugging */ 119 WPI_DEBUG_CMD = 0x00000010, /* Stage 2 CMD intrp debugging*/ 120 WPI_DEBUG_FIRMWARE = 0x00000020, /* firmware(9) loading debug */ 121 WPI_DEBUG_DMA = 0x00000040, /* DMA (de)allocations/syncs */ 122 WPI_DEBUG_SCANNING = 0x00000080, /* Stage 2 Scanning debugging */ 123 WPI_DEBUG_NOTIFY = 0x00000100, /* State 2 Noftif intr debug */ 124 WPI_DEBUG_TEMP = 0x00000200, /* TXPower/Temp Calibration */ 125 WPI_DEBUG_OPS = 0x00000400, /* wpi_ops taskq debug */ 126 WPI_DEBUG_WATCHDOG = 0x00000800, /* Watch dog debug */ 127 WPI_DEBUG_ANY = 0xffffffff 128 }; 129 130 static int wpi_debug = 0; 131 SYSCTL_INT(_debug, OID_AUTO, wpi, CTLFLAG_RW, &wpi_debug, 0, "wpi debug level"); 132 TUNABLE_INT("debug.wpi", &wpi_debug); 133 134 #else 135 #define DPRINTF(x) 136 #define DPRINTFN(n, x) 137 #define WPI_DEBUG_SET 0 138 #endif 139 140 struct wpi_ident { 141 uint16_t vendor; 142 uint16_t device; 143 uint16_t subdevice; 144 const char *name; 145 }; 146 147 static const struct wpi_ident wpi_ident_table[] = { 148 /* The below entries support ABG regardless of the subid */ 149 { 0x8086, 0x4222, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 150 { 0x8086, 0x4227, 0x0, "Intel(R) PRO/Wireless 3945ABG" }, 151 /* The below entries only support BG */ 152 { 0x8086, 0x4222, 0x1005, "Intel(R) PRO/Wireless 3945BG" }, 153 { 0x8086, 0x4222, 0x1034, "Intel(R) PRO/Wireless 3945BG" }, 154 { 0x8086, 0x4227, 0x1014, "Intel(R) PRO/Wireless 3945BG" }, 155 { 0x8086, 0x4222, 0x1044, "Intel(R) PRO/Wireless 3945BG" }, 156 { 0, 0, 0, NULL } 157 }; 158 159 static struct ieee80211vap *wpi_vap_create(struct ieee80211com *, 160 const char [IFNAMSIZ], int, enum ieee80211_opmode, int, 161 const uint8_t [IEEE80211_ADDR_LEN], 162 const uint8_t [IEEE80211_ADDR_LEN]); 163 static void wpi_vap_delete(struct ieee80211vap *); 164 static int wpi_dma_contig_alloc(struct wpi_softc *, struct wpi_dma_info *, 165 void **, bus_size_t, bus_size_t, int); 166 static void wpi_dma_contig_free(struct wpi_dma_info *); 167 static void wpi_dma_map_addr(void *, bus_dma_segment_t *, int, int); 168 static int wpi_alloc_shared(struct wpi_softc *); 169 static void wpi_free_shared(struct wpi_softc *); 170 static int wpi_alloc_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 171 static void wpi_reset_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 172 static void wpi_free_rx_ring(struct wpi_softc *, struct wpi_rx_ring *); 173 static int wpi_alloc_tx_ring(struct wpi_softc *, struct wpi_tx_ring *, 174 int, int); 175 static void wpi_reset_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 176 static void wpi_free_tx_ring(struct wpi_softc *, struct wpi_tx_ring *); 177 static int wpi_newstate(struct ieee80211vap *, enum ieee80211_state, int); 178 static void wpi_mem_lock(struct wpi_softc *); 179 static void wpi_mem_unlock(struct wpi_softc *); 180 static uint32_t wpi_mem_read(struct wpi_softc *, uint16_t); 181 static void wpi_mem_write(struct wpi_softc *, uint16_t, uint32_t); 182 static void wpi_mem_write_region_4(struct wpi_softc *, uint16_t, 183 const uint32_t *, int); 184 static uint16_t wpi_read_prom_data(struct wpi_softc *, uint32_t, void *, int); 185 static int wpi_alloc_fwmem(struct wpi_softc *); 186 static void wpi_free_fwmem(struct wpi_softc *); 187 static int wpi_load_firmware(struct wpi_softc *); 188 static void wpi_unload_firmware(struct wpi_softc *); 189 static int wpi_load_microcode(struct wpi_softc *, const uint8_t *, int); 190 static void wpi_rx_intr(struct wpi_softc *, struct wpi_rx_desc *, 191 struct wpi_rx_data *); 192 static void wpi_tx_intr(struct wpi_softc *, struct wpi_rx_desc *); 193 static void wpi_cmd_intr(struct wpi_softc *, struct wpi_rx_desc *); 194 static void wpi_notif_intr(struct wpi_softc *); 195 static void wpi_intr(void *); 196 static uint8_t wpi_plcp_signal(int); 197 static void wpi_watchdog(void *); 198 static int wpi_tx_data(struct wpi_softc *, struct mbuf *, 199 struct ieee80211_node *, int); 200 static void wpi_start(struct ifnet *); 201 static void wpi_start_locked(struct ifnet *); 202 static int wpi_raw_xmit(struct ieee80211_node *, struct mbuf *, 203 const struct ieee80211_bpf_params *); 204 static void wpi_scan_start(struct ieee80211com *); 205 static void wpi_scan_end(struct ieee80211com *); 206 static void wpi_set_channel(struct ieee80211com *); 207 static void wpi_scan_curchan(struct ieee80211_scan_state *, unsigned long); 208 static void wpi_scan_mindwell(struct ieee80211_scan_state *); 209 static int wpi_ioctl(struct ifnet *, u_long, caddr_t); 210 static void wpi_read_eeprom(struct wpi_softc *, 211 uint8_t macaddr[IEEE80211_ADDR_LEN]); 212 static void wpi_read_eeprom_channels(struct wpi_softc *, int); 213 static void wpi_read_eeprom_group(struct wpi_softc *, int); 214 static int wpi_cmd(struct wpi_softc *, int, const void *, int, int); 215 static int wpi_wme_update(struct ieee80211com *); 216 static int wpi_mrr_setup(struct wpi_softc *); 217 static void wpi_set_led(struct wpi_softc *, uint8_t, uint8_t, uint8_t); 218 static void wpi_enable_tsf(struct wpi_softc *, struct ieee80211_node *); 219 #if 0 220 static int wpi_setup_beacon(struct wpi_softc *, struct ieee80211_node *); 221 #endif 222 static int wpi_auth(struct wpi_softc *, struct ieee80211vap *); 223 static int wpi_run(struct wpi_softc *, struct ieee80211vap *); 224 static int wpi_scan(struct wpi_softc *); 225 static int wpi_config(struct wpi_softc *); 226 static void wpi_stop_master(struct wpi_softc *); 227 static int wpi_power_up(struct wpi_softc *); 228 static int wpi_reset(struct wpi_softc *); 229 static void wpi_hwreset(void *, int); 230 static void wpi_rfreset(void *, int); 231 static void wpi_hw_config(struct wpi_softc *); 232 static void wpi_init(void *); 233 static void wpi_init_locked(struct wpi_softc *, int); 234 static void wpi_stop(struct wpi_softc *); 235 static void wpi_stop_locked(struct wpi_softc *); 236 237 static int wpi_set_txpower(struct wpi_softc *, struct ieee80211_channel *, 238 int); 239 static void wpi_calib_timeout(void *); 240 static void wpi_power_calibration(struct wpi_softc *, int); 241 static int wpi_get_power_index(struct wpi_softc *, 242 struct wpi_power_group *, struct ieee80211_channel *, int); 243 #ifdef WPI_DEBUG 244 static const char *wpi_cmd_str(int); 245 #endif 246 static int wpi_probe(device_t); 247 static int wpi_attach(device_t); 248 static int wpi_detach(device_t); 249 static int wpi_shutdown(device_t); 250 static int wpi_suspend(device_t); 251 static int wpi_resume(device_t); 252 253 static device_method_t wpi_methods[] = { 254 /* Device interface */ 255 DEVMETHOD(device_probe, wpi_probe), 256 DEVMETHOD(device_attach, wpi_attach), 257 DEVMETHOD(device_detach, wpi_detach), 258 DEVMETHOD(device_shutdown, wpi_shutdown), 259 DEVMETHOD(device_suspend, wpi_suspend), 260 DEVMETHOD(device_resume, wpi_resume), 261 262 DEVMETHOD_END 263 }; 264 265 static driver_t wpi_driver = { 266 "wpi", 267 wpi_methods, 268 sizeof (struct wpi_softc) 269 }; 270 271 static devclass_t wpi_devclass; 272 273 DRIVER_MODULE(wpi, pci, wpi_driver, wpi_devclass, NULL, NULL); 274 275 MODULE_VERSION(wpi, 1); 276 277 static const uint8_t wpi_ridx_to_plcp[] = { 278 /* OFDM: IEEE Std 802.11a-1999, pp. 14 Table 80 */ 279 /* R1-R4 (ral/ural is R4-R1) */ 280 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3, 281 /* CCK: device-dependent */ 282 10, 20, 55, 110 283 }; 284 285 static const uint8_t wpi_ridx_to_rate[] = { 286 12, 18, 24, 36, 48, 72, 96, 108, /* OFDM */ 287 2, 4, 11, 22 /*CCK */ 288 }; 289 290 static int 291 wpi_probe(device_t dev) 292 { 293 const struct wpi_ident *ident; 294 295 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 296 if (pci_get_vendor(dev) == ident->vendor && 297 pci_get_device(dev) == ident->device) { 298 device_set_desc(dev, ident->name); 299 return (BUS_PROBE_DEFAULT); 300 } 301 } 302 return ENXIO; 303 } 304 305 /** 306 * Load the firmare image from disk to the allocated dma buffer. 307 * we also maintain the reference to the firmware pointer as there 308 * is times where we may need to reload the firmware but we are not 309 * in a context that can access the filesystem (ie taskq cause by restart) 310 * 311 * @return 0 on success, an errno on failure 312 */ 313 static int 314 wpi_load_firmware(struct wpi_softc *sc) 315 { 316 const struct firmware *fp; 317 struct wpi_dma_info *dma = &sc->fw_dma; 318 const struct wpi_firmware_hdr *hdr; 319 const uint8_t *itext, *idata, *rtext, *rdata, *btext; 320 uint32_t itextsz, idatasz, rtextsz, rdatasz, btextsz; 321 int error; 322 323 DPRINTFN(WPI_DEBUG_FIRMWARE, 324 ("Attempting Loading Firmware from wpi_fw module\n")); 325 326 WPI_UNLOCK(sc); 327 328 if (sc->fw_fp == NULL && (sc->fw_fp = firmware_get("wpifw")) == NULL) { 329 device_printf(sc->sc_dev, 330 "could not load firmware image 'wpifw'\n"); 331 error = ENOENT; 332 WPI_LOCK(sc); 333 goto fail; 334 } 335 336 fp = sc->fw_fp; 337 338 WPI_LOCK(sc); 339 340 /* Validate the firmware is minimum a particular version */ 341 if (fp->version < WPI_FW_MINVERSION) { 342 device_printf(sc->sc_dev, 343 "firmware version is too old. Need %d, got %d\n", 344 WPI_FW_MINVERSION, 345 fp->version); 346 error = ENXIO; 347 goto fail; 348 } 349 350 if (fp->datasize < sizeof (struct wpi_firmware_hdr)) { 351 device_printf(sc->sc_dev, 352 "firmware file too short: %zu bytes\n", fp->datasize); 353 error = ENXIO; 354 goto fail; 355 } 356 357 hdr = (const struct wpi_firmware_hdr *)fp->data; 358 359 /* | RUNTIME FIRMWARE | INIT FIRMWARE | BOOT FW | 360 |HDR|<--TEXT-->|<--DATA-->|<--TEXT-->|<--DATA-->|<--TEXT-->| */ 361 362 rtextsz = le32toh(hdr->rtextsz); 363 rdatasz = le32toh(hdr->rdatasz); 364 itextsz = le32toh(hdr->itextsz); 365 idatasz = le32toh(hdr->idatasz); 366 btextsz = le32toh(hdr->btextsz); 367 368 /* check that all firmware segments are present */ 369 if (fp->datasize < sizeof (struct wpi_firmware_hdr) + 370 rtextsz + rdatasz + itextsz + idatasz + btextsz) { 371 device_printf(sc->sc_dev, 372 "firmware file too short: %zu bytes\n", fp->datasize); 373 error = ENXIO; /* XXX appropriate error code? */ 374 goto fail; 375 } 376 377 /* get pointers to firmware segments */ 378 rtext = (const uint8_t *)(hdr + 1); 379 rdata = rtext + rtextsz; 380 itext = rdata + rdatasz; 381 idata = itext + itextsz; 382 btext = idata + idatasz; 383 384 DPRINTFN(WPI_DEBUG_FIRMWARE, 385 ("Firmware Version: Major %d, Minor %d, Driver %d, \n" 386 "runtime (text: %u, data: %u) init (text: %u, data %u) boot (text %u)\n", 387 (le32toh(hdr->version) & 0xff000000) >> 24, 388 (le32toh(hdr->version) & 0x00ff0000) >> 16, 389 (le32toh(hdr->version) & 0x0000ffff), 390 rtextsz, rdatasz, 391 itextsz, idatasz, btextsz)); 392 393 DPRINTFN(WPI_DEBUG_FIRMWARE,("rtext 0x%x\n", *(const uint32_t *)rtext)); 394 DPRINTFN(WPI_DEBUG_FIRMWARE,("rdata 0x%x\n", *(const uint32_t *)rdata)); 395 DPRINTFN(WPI_DEBUG_FIRMWARE,("itext 0x%x\n", *(const uint32_t *)itext)); 396 DPRINTFN(WPI_DEBUG_FIRMWARE,("idata 0x%x\n", *(const uint32_t *)idata)); 397 DPRINTFN(WPI_DEBUG_FIRMWARE,("btext 0x%x\n", *(const uint32_t *)btext)); 398 399 /* sanity checks */ 400 if (rtextsz > WPI_FW_MAIN_TEXT_MAXSZ || 401 rdatasz > WPI_FW_MAIN_DATA_MAXSZ || 402 itextsz > WPI_FW_INIT_TEXT_MAXSZ || 403 idatasz > WPI_FW_INIT_DATA_MAXSZ || 404 btextsz > WPI_FW_BOOT_TEXT_MAXSZ || 405 (btextsz & 3) != 0) { 406 device_printf(sc->sc_dev, "firmware invalid\n"); 407 error = EINVAL; 408 goto fail; 409 } 410 411 /* copy initialization images into pre-allocated DMA-safe memory */ 412 memcpy(dma->vaddr, idata, idatasz); 413 memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, itext, itextsz); 414 415 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 416 417 /* tell adapter where to find initialization images */ 418 wpi_mem_lock(sc); 419 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 420 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, idatasz); 421 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 422 dma->paddr + WPI_FW_INIT_DATA_MAXSZ); 423 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, itextsz); 424 wpi_mem_unlock(sc); 425 426 /* load firmware boot code */ 427 if ((error = wpi_load_microcode(sc, btext, btextsz)) != 0) { 428 device_printf(sc->sc_dev, "Failed to load microcode\n"); 429 goto fail; 430 } 431 432 /* now press "execute" */ 433 WPI_WRITE(sc, WPI_RESET, 0); 434 435 /* wait at most one second for the first alive notification */ 436 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) { 437 device_printf(sc->sc_dev, 438 "timeout waiting for adapter to initialize\n"); 439 goto fail; 440 } 441 442 /* copy runtime images into pre-allocated DMA-sage memory */ 443 memcpy(dma->vaddr, rdata, rdatasz); 444 memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, rtext, rtextsz); 445 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE); 446 447 /* tell adapter where to find runtime images */ 448 wpi_mem_lock(sc); 449 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr); 450 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, rdatasz); 451 wpi_mem_write(sc, WPI_MEM_TEXT_BASE, 452 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ); 453 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | rtextsz); 454 wpi_mem_unlock(sc); 455 456 /* wait at most one second for the first alive notification */ 457 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) { 458 device_printf(sc->sc_dev, 459 "timeout waiting for adapter to initialize2\n"); 460 goto fail; 461 } 462 463 DPRINTFN(WPI_DEBUG_FIRMWARE, 464 ("Firmware loaded to driver successfully\n")); 465 return error; 466 fail: 467 wpi_unload_firmware(sc); 468 return error; 469 } 470 471 /** 472 * Free the referenced firmware image 473 */ 474 static void 475 wpi_unload_firmware(struct wpi_softc *sc) 476 { 477 478 if (sc->fw_fp) { 479 WPI_UNLOCK(sc); 480 firmware_put(sc->fw_fp, FIRMWARE_UNLOAD); 481 WPI_LOCK(sc); 482 sc->fw_fp = NULL; 483 } 484 } 485 486 static int 487 wpi_attach(device_t dev) 488 { 489 struct wpi_softc *sc = device_get_softc(dev); 490 struct ifnet *ifp; 491 struct ieee80211com *ic; 492 int ac, error, rid, supportsa = 1; 493 uint32_t tmp; 494 const struct wpi_ident *ident; 495 uint8_t macaddr[IEEE80211_ADDR_LEN]; 496 497 sc->sc_dev = dev; 498 499 if (bootverbose || WPI_DEBUG_SET) 500 device_printf(sc->sc_dev,"Driver Revision %s\n", VERSION); 501 502 /* 503 * Some card's only support 802.11b/g not a, check to see if 504 * this is one such card. A 0x0 in the subdevice table indicates 505 * the entire subdevice range is to be ignored. 506 */ 507 for (ident = wpi_ident_table; ident->name != NULL; ident++) { 508 if (ident->subdevice && 509 pci_get_subdevice(dev) == ident->subdevice) { 510 supportsa = 0; 511 break; 512 } 513 } 514 515 /* Create the tasks that can be queued */ 516 TASK_INIT(&sc->sc_restarttask, 0, wpi_hwreset, sc); 517 TASK_INIT(&sc->sc_radiotask, 0, wpi_rfreset, sc); 518 519 WPI_LOCK_INIT(sc); 520 521 callout_init_mtx(&sc->calib_to, &sc->sc_mtx, 0); 522 callout_init_mtx(&sc->watchdog_to, &sc->sc_mtx, 0); 523 524 /* disable the retry timeout register */ 525 pci_write_config(dev, 0x41, 0, 1); 526 527 /* enable bus-mastering */ 528 pci_enable_busmaster(dev); 529 530 rid = PCIR_BAR(0); 531 sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 532 RF_ACTIVE); 533 if (sc->mem == NULL) { 534 device_printf(dev, "could not allocate memory resource\n"); 535 error = ENOMEM; 536 goto fail; 537 } 538 539 sc->sc_st = rman_get_bustag(sc->mem); 540 sc->sc_sh = rman_get_bushandle(sc->mem); 541 542 rid = 0; 543 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 544 RF_ACTIVE | RF_SHAREABLE); 545 if (sc->irq == NULL) { 546 device_printf(dev, "could not allocate interrupt resource\n"); 547 error = ENOMEM; 548 goto fail; 549 } 550 551 /* 552 * Allocate DMA memory for firmware transfers. 553 */ 554 if ((error = wpi_alloc_fwmem(sc)) != 0) { 555 printf(": could not allocate firmware memory\n"); 556 error = ENOMEM; 557 goto fail; 558 } 559 560 /* 561 * Put adapter into a known state. 562 */ 563 if ((error = wpi_reset(sc)) != 0) { 564 device_printf(dev, "could not reset adapter\n"); 565 goto fail; 566 } 567 568 wpi_mem_lock(sc); 569 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 570 if (bootverbose || WPI_DEBUG_SET) 571 device_printf(sc->sc_dev, "Hardware Revision (0x%X)\n", tmp); 572 573 wpi_mem_unlock(sc); 574 575 /* Allocate shared page */ 576 if ((error = wpi_alloc_shared(sc)) != 0) { 577 device_printf(dev, "could not allocate shared page\n"); 578 goto fail; 579 } 580 581 /* tx data queues - 4 for QoS purposes */ 582 for (ac = 0; ac < WME_NUM_AC; ac++) { 583 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac); 584 if (error != 0) { 585 device_printf(dev, "could not allocate Tx ring %d\n",ac); 586 goto fail; 587 } 588 } 589 590 /* command queue to talk to the card's firmware */ 591 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4); 592 if (error != 0) { 593 device_printf(dev, "could not allocate command ring\n"); 594 goto fail; 595 } 596 597 /* receive data queue */ 598 error = wpi_alloc_rx_ring(sc, &sc->rxq); 599 if (error != 0) { 600 device_printf(dev, "could not allocate Rx ring\n"); 601 goto fail; 602 } 603 604 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211); 605 if (ifp == NULL) { 606 device_printf(dev, "can not if_alloc()\n"); 607 error = ENOMEM; 608 goto fail; 609 } 610 ic = ifp->if_l2com; 611 612 ic->ic_ifp = ifp; 613 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */ 614 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */ 615 616 /* set device capabilities */ 617 ic->ic_caps = 618 IEEE80211_C_STA /* station mode supported */ 619 | IEEE80211_C_MONITOR /* monitor mode supported */ 620 | IEEE80211_C_TXPMGT /* tx power management */ 621 | IEEE80211_C_SHSLOT /* short slot time supported */ 622 | IEEE80211_C_SHPREAMBLE /* short preamble supported */ 623 | IEEE80211_C_WPA /* 802.11i */ 624 /* XXX looks like WME is partly supported? */ 625 #if 0 626 | IEEE80211_C_IBSS /* IBSS mode support */ 627 | IEEE80211_C_BGSCAN /* capable of bg scanning */ 628 | IEEE80211_C_WME /* 802.11e */ 629 | IEEE80211_C_HOSTAP /* Host access point mode */ 630 #endif 631 ; 632 633 /* 634 * Read in the eeprom and also setup the channels for 635 * net80211. We don't set the rates as net80211 does this for us 636 */ 637 wpi_read_eeprom(sc, macaddr); 638 639 if (bootverbose || WPI_DEBUG_SET) { 640 device_printf(sc->sc_dev, "Regulatory Domain: %.4s\n", sc->domain); 641 device_printf(sc->sc_dev, "Hardware Type: %c\n", 642 sc->type > 1 ? 'B': '?'); 643 device_printf(sc->sc_dev, "Hardware Revision: %c\n", 644 ((le16toh(sc->rev) & 0xf0) == 0xd0) ? 'D': '?'); 645 device_printf(sc->sc_dev, "SKU %s support 802.11a\n", 646 supportsa ? "does" : "does not"); 647 648 /* XXX hw_config uses the PCIDEV for the Hardware rev. Must check 649 what sc->rev really represents - benjsc 20070615 */ 650 } 651 652 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 653 ifp->if_softc = sc; 654 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 655 ifp->if_init = wpi_init; 656 ifp->if_ioctl = wpi_ioctl; 657 ifp->if_start = wpi_start; 658 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 659 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 660 IFQ_SET_READY(&ifp->if_snd); 661 662 ieee80211_ifattach(ic, macaddr); 663 /* override default methods */ 664 ic->ic_raw_xmit = wpi_raw_xmit; 665 ic->ic_wme.wme_update = wpi_wme_update; 666 ic->ic_scan_start = wpi_scan_start; 667 ic->ic_scan_end = wpi_scan_end; 668 ic->ic_set_channel = wpi_set_channel; 669 ic->ic_scan_curchan = wpi_scan_curchan; 670 ic->ic_scan_mindwell = wpi_scan_mindwell; 671 672 ic->ic_vap_create = wpi_vap_create; 673 ic->ic_vap_delete = wpi_vap_delete; 674 675 ieee80211_radiotap_attach(ic, 676 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap), 677 WPI_TX_RADIOTAP_PRESENT, 678 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap), 679 WPI_RX_RADIOTAP_PRESENT); 680 681 /* 682 * Hook our interrupt after all initialization is complete. 683 */ 684 error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET |INTR_MPSAFE, 685 NULL, wpi_intr, sc, &sc->sc_ih); 686 if (error != 0) { 687 device_printf(dev, "could not set up interrupt\n"); 688 goto fail; 689 } 690 691 if (bootverbose) 692 ieee80211_announce(ic); 693 #ifdef XXX_DEBUG 694 ieee80211_announce_channels(ic); 695 #endif 696 return 0; 697 698 fail: wpi_detach(dev); 699 return ENXIO; 700 } 701 702 static int 703 wpi_detach(device_t dev) 704 { 705 struct wpi_softc *sc = device_get_softc(dev); 706 struct ifnet *ifp = sc->sc_ifp; 707 struct ieee80211com *ic; 708 int ac; 709 710 if (sc->irq != NULL) 711 bus_teardown_intr(dev, sc->irq, sc->sc_ih); 712 713 if (ifp != NULL) { 714 ic = ifp->if_l2com; 715 716 ieee80211_draintask(ic, &sc->sc_restarttask); 717 ieee80211_draintask(ic, &sc->sc_radiotask); 718 wpi_stop(sc); 719 callout_drain(&sc->watchdog_to); 720 callout_drain(&sc->calib_to); 721 ieee80211_ifdetach(ic); 722 } 723 724 WPI_LOCK(sc); 725 if (sc->txq[0].data_dmat) { 726 for (ac = 0; ac < WME_NUM_AC; ac++) 727 wpi_free_tx_ring(sc, &sc->txq[ac]); 728 729 wpi_free_tx_ring(sc, &sc->cmdq); 730 wpi_free_rx_ring(sc, &sc->rxq); 731 wpi_free_shared(sc); 732 } 733 734 if (sc->fw_fp != NULL) { 735 wpi_unload_firmware(sc); 736 } 737 738 if (sc->fw_dma.tag) 739 wpi_free_fwmem(sc); 740 WPI_UNLOCK(sc); 741 742 if (sc->irq != NULL) 743 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq), 744 sc->irq); 745 if (sc->mem != NULL) 746 bus_release_resource(dev, SYS_RES_MEMORY, 747 rman_get_rid(sc->mem), sc->mem); 748 749 if (ifp != NULL) 750 if_free(ifp); 751 752 WPI_LOCK_DESTROY(sc); 753 754 return 0; 755 } 756 757 static struct ieee80211vap * 758 wpi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit, 759 enum ieee80211_opmode opmode, int flags, 760 const uint8_t bssid[IEEE80211_ADDR_LEN], 761 const uint8_t mac[IEEE80211_ADDR_LEN]) 762 { 763 struct wpi_vap *wvp; 764 struct ieee80211vap *vap; 765 766 if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */ 767 return NULL; 768 wvp = (struct wpi_vap *) malloc(sizeof(struct wpi_vap), 769 M_80211_VAP, M_NOWAIT | M_ZERO); 770 if (wvp == NULL) 771 return NULL; 772 vap = &wvp->vap; 773 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac); 774 /* override with driver methods */ 775 wvp->newstate = vap->iv_newstate; 776 vap->iv_newstate = wpi_newstate; 777 778 ieee80211_ratectl_init(vap); 779 /* complete setup */ 780 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status); 781 ic->ic_opmode = opmode; 782 return vap; 783 } 784 785 static void 786 wpi_vap_delete(struct ieee80211vap *vap) 787 { 788 struct wpi_vap *wvp = WPI_VAP(vap); 789 790 ieee80211_ratectl_deinit(vap); 791 ieee80211_vap_detach(vap); 792 free(wvp, M_80211_VAP); 793 } 794 795 static void 796 wpi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 797 { 798 if (error != 0) 799 return; 800 801 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs)); 802 803 *(bus_addr_t *)arg = segs[0].ds_addr; 804 } 805 806 /* 807 * Allocates a contiguous block of dma memory of the requested size and 808 * alignment. Due to limitations of the FreeBSD dma subsystem as of 20071217, 809 * allocations greater than 4096 may fail. Hence if the requested alignment is 810 * greater we allocate 'alignment' size extra memory and shift the vaddr and 811 * paddr after the dma load. This bypasses the problem at the cost of a little 812 * more memory. 813 */ 814 static int 815 wpi_dma_contig_alloc(struct wpi_softc *sc, struct wpi_dma_info *dma, 816 void **kvap, bus_size_t size, bus_size_t alignment, int flags) 817 { 818 int error; 819 bus_size_t align; 820 bus_size_t reqsize; 821 822 DPRINTFN(WPI_DEBUG_DMA, 823 ("Size: %zd - alignment %zd\n", size, alignment)); 824 825 dma->size = size; 826 dma->tag = NULL; 827 828 if (alignment > 4096) { 829 align = PAGE_SIZE; 830 reqsize = size + alignment; 831 } else { 832 align = alignment; 833 reqsize = size; 834 } 835 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), align, 836 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, 837 NULL, NULL, reqsize, 838 1, reqsize, flags, 839 NULL, NULL, &dma->tag); 840 if (error != 0) { 841 device_printf(sc->sc_dev, 842 "could not create shared page DMA tag\n"); 843 goto fail; 844 } 845 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr_start, 846 flags | BUS_DMA_ZERO, &dma->map); 847 if (error != 0) { 848 device_printf(sc->sc_dev, 849 "could not allocate shared page DMA memory\n"); 850 goto fail; 851 } 852 853 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr_start, 854 reqsize, wpi_dma_map_addr, &dma->paddr_start, flags); 855 856 /* Save the original pointers so we can free all the memory */ 857 dma->paddr = dma->paddr_start; 858 dma->vaddr = dma->vaddr_start; 859 860 /* 861 * Check the alignment and increment by 4096 until we get the 862 * requested alignment. Fail if can't obtain the alignment 863 * we requested. 864 */ 865 if ((dma->paddr & (alignment -1 )) != 0) { 866 int i; 867 868 for (i = 0; i < alignment / 4096; i++) { 869 if ((dma->paddr & (alignment - 1 )) == 0) 870 break; 871 dma->paddr += 4096; 872 dma->vaddr += 4096; 873 } 874 if (i == alignment / 4096) { 875 device_printf(sc->sc_dev, 876 "alignment requirement was not satisfied\n"); 877 goto fail; 878 } 879 } 880 881 if (error != 0) { 882 device_printf(sc->sc_dev, 883 "could not load shared page DMA map\n"); 884 goto fail; 885 } 886 887 if (kvap != NULL) 888 *kvap = dma->vaddr; 889 890 return 0; 891 892 fail: 893 wpi_dma_contig_free(dma); 894 return error; 895 } 896 897 static void 898 wpi_dma_contig_free(struct wpi_dma_info *dma) 899 { 900 if (dma->tag) { 901 if (dma->map != NULL) { 902 if (dma->paddr_start != 0) { 903 bus_dmamap_sync(dma->tag, dma->map, 904 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 905 bus_dmamap_unload(dma->tag, dma->map); 906 } 907 bus_dmamem_free(dma->tag, &dma->vaddr_start, dma->map); 908 } 909 bus_dma_tag_destroy(dma->tag); 910 } 911 } 912 913 /* 914 * Allocate a shared page between host and NIC. 915 */ 916 static int 917 wpi_alloc_shared(struct wpi_softc *sc) 918 { 919 int error; 920 921 error = wpi_dma_contig_alloc(sc, &sc->shared_dma, 922 (void **)&sc->shared, sizeof (struct wpi_shared), 923 PAGE_SIZE, 924 BUS_DMA_NOWAIT); 925 926 if (error != 0) { 927 device_printf(sc->sc_dev, 928 "could not allocate shared area DMA memory\n"); 929 } 930 931 return error; 932 } 933 934 static void 935 wpi_free_shared(struct wpi_softc *sc) 936 { 937 wpi_dma_contig_free(&sc->shared_dma); 938 } 939 940 static int 941 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 942 { 943 944 int i, error; 945 946 ring->cur = 0; 947 948 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 949 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t), 950 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 951 952 if (error != 0) { 953 device_printf(sc->sc_dev, 954 "%s: could not allocate rx ring DMA memory, error %d\n", 955 __func__, error); 956 goto fail; 957 } 958 959 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 960 BUS_SPACE_MAXADDR_32BIT, 961 BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1, 962 MJUMPAGESIZE, BUS_DMA_NOWAIT, NULL, NULL, &ring->data_dmat); 963 if (error != 0) { 964 device_printf(sc->sc_dev, 965 "%s: bus_dma_tag_create_failed, error %d\n", 966 __func__, error); 967 goto fail; 968 } 969 970 /* 971 * Setup Rx buffers. 972 */ 973 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 974 struct wpi_rx_data *data = &ring->data[i]; 975 struct mbuf *m; 976 bus_addr_t paddr; 977 978 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 979 if (error != 0) { 980 device_printf(sc->sc_dev, 981 "%s: bus_dmamap_create failed, error %d\n", 982 __func__, error); 983 goto fail; 984 } 985 m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 986 if (m == NULL) { 987 device_printf(sc->sc_dev, 988 "%s: could not allocate rx mbuf\n", __func__); 989 error = ENOMEM; 990 goto fail; 991 } 992 /* map page */ 993 error = bus_dmamap_load(ring->data_dmat, data->map, 994 mtod(m, caddr_t), MJUMPAGESIZE, 995 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 996 if (error != 0 && error != EFBIG) { 997 device_printf(sc->sc_dev, 998 "%s: bus_dmamap_load failed, error %d\n", 999 __func__, error); 1000 m_freem(m); 1001 error = ENOMEM; /* XXX unique code */ 1002 goto fail; 1003 } 1004 bus_dmamap_sync(ring->data_dmat, data->map, 1005 BUS_DMASYNC_PREWRITE); 1006 1007 data->m = m; 1008 ring->desc[i] = htole32(paddr); 1009 } 1010 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 1011 BUS_DMASYNC_PREWRITE); 1012 return 0; 1013 fail: 1014 wpi_free_rx_ring(sc, ring); 1015 return error; 1016 } 1017 1018 static void 1019 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1020 { 1021 int ntries; 1022 1023 wpi_mem_lock(sc); 1024 1025 WPI_WRITE(sc, WPI_RX_CONFIG, 0); 1026 1027 for (ntries = 0; ntries < 100; ntries++) { 1028 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE) 1029 break; 1030 DELAY(10); 1031 } 1032 1033 wpi_mem_unlock(sc); 1034 1035 #ifdef WPI_DEBUG 1036 if (ntries == 100 && wpi_debug > 0) 1037 device_printf(sc->sc_dev, "timeout resetting Rx ring\n"); 1038 #endif 1039 1040 ring->cur = 0; 1041 } 1042 1043 static void 1044 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring) 1045 { 1046 int i; 1047 1048 wpi_dma_contig_free(&ring->desc_dma); 1049 1050 for (i = 0; i < WPI_RX_RING_COUNT; i++) { 1051 struct wpi_rx_data *data = &ring->data[i]; 1052 1053 if (data->m != NULL) { 1054 bus_dmamap_sync(ring->data_dmat, data->map, 1055 BUS_DMASYNC_POSTREAD); 1056 bus_dmamap_unload(ring->data_dmat, data->map); 1057 m_freem(data->m); 1058 } 1059 if (data->map != NULL) 1060 bus_dmamap_destroy(ring->data_dmat, data->map); 1061 } 1062 } 1063 1064 static int 1065 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count, 1066 int qid) 1067 { 1068 struct wpi_tx_data *data; 1069 int i, error; 1070 1071 ring->qid = qid; 1072 ring->count = count; 1073 ring->queued = 0; 1074 ring->cur = 0; 1075 ring->data = NULL; 1076 1077 error = wpi_dma_contig_alloc(sc, &ring->desc_dma, 1078 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc), 1079 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT); 1080 1081 if (error != 0) { 1082 device_printf(sc->sc_dev, "could not allocate tx dma memory\n"); 1083 goto fail; 1084 } 1085 1086 /* update shared page with ring's base address */ 1087 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr); 1088 1089 error = wpi_dma_contig_alloc(sc, &ring->cmd_dma, (void **)&ring->cmd, 1090 count * sizeof (struct wpi_tx_cmd), WPI_RING_DMA_ALIGN, 1091 BUS_DMA_NOWAIT); 1092 1093 if (error != 0) { 1094 device_printf(sc->sc_dev, 1095 "could not allocate tx command DMA memory\n"); 1096 goto fail; 1097 } 1098 1099 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF, 1100 M_NOWAIT | M_ZERO); 1101 if (ring->data == NULL) { 1102 device_printf(sc->sc_dev, 1103 "could not allocate tx data slots\n"); 1104 goto fail; 1105 } 1106 1107 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0, 1108 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1109 WPI_MAX_SCATTER - 1, MCLBYTES, BUS_DMA_NOWAIT, NULL, NULL, 1110 &ring->data_dmat); 1111 if (error != 0) { 1112 device_printf(sc->sc_dev, "could not create data DMA tag\n"); 1113 goto fail; 1114 } 1115 1116 for (i = 0; i < count; i++) { 1117 data = &ring->data[i]; 1118 1119 error = bus_dmamap_create(ring->data_dmat, 0, &data->map); 1120 if (error != 0) { 1121 device_printf(sc->sc_dev, 1122 "could not create tx buf DMA map\n"); 1123 goto fail; 1124 } 1125 bus_dmamap_sync(ring->data_dmat, data->map, 1126 BUS_DMASYNC_PREWRITE); 1127 } 1128 1129 return 0; 1130 1131 fail: 1132 wpi_free_tx_ring(sc, ring); 1133 return error; 1134 } 1135 1136 static void 1137 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1138 { 1139 struct wpi_tx_data *data; 1140 int i, ntries; 1141 1142 wpi_mem_lock(sc); 1143 1144 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0); 1145 for (ntries = 0; ntries < 100; ntries++) { 1146 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid)) 1147 break; 1148 DELAY(10); 1149 } 1150 #ifdef WPI_DEBUG 1151 if (ntries == 100 && wpi_debug > 0) 1152 device_printf(sc->sc_dev, "timeout resetting Tx ring %d\n", 1153 ring->qid); 1154 #endif 1155 wpi_mem_unlock(sc); 1156 1157 for (i = 0; i < ring->count; i++) { 1158 data = &ring->data[i]; 1159 1160 if (data->m != NULL) { 1161 bus_dmamap_unload(ring->data_dmat, data->map); 1162 m_freem(data->m); 1163 data->m = NULL; 1164 } 1165 } 1166 1167 ring->queued = 0; 1168 ring->cur = 0; 1169 } 1170 1171 static void 1172 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring) 1173 { 1174 struct wpi_tx_data *data; 1175 int i; 1176 1177 wpi_dma_contig_free(&ring->desc_dma); 1178 wpi_dma_contig_free(&ring->cmd_dma); 1179 1180 if (ring->data != NULL) { 1181 for (i = 0; i < ring->count; i++) { 1182 data = &ring->data[i]; 1183 1184 if (data->m != NULL) { 1185 bus_dmamap_sync(ring->data_dmat, data->map, 1186 BUS_DMASYNC_POSTWRITE); 1187 bus_dmamap_unload(ring->data_dmat, data->map); 1188 m_freem(data->m); 1189 data->m = NULL; 1190 } 1191 } 1192 free(ring->data, M_DEVBUF); 1193 } 1194 1195 if (ring->data_dmat != NULL) 1196 bus_dma_tag_destroy(ring->data_dmat); 1197 } 1198 1199 static int 1200 wpi_shutdown(device_t dev) 1201 { 1202 struct wpi_softc *sc = device_get_softc(dev); 1203 1204 WPI_LOCK(sc); 1205 wpi_stop_locked(sc); 1206 wpi_unload_firmware(sc); 1207 WPI_UNLOCK(sc); 1208 1209 return 0; 1210 } 1211 1212 static int 1213 wpi_suspend(device_t dev) 1214 { 1215 struct wpi_softc *sc = device_get_softc(dev); 1216 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 1217 1218 ieee80211_suspend_all(ic); 1219 return 0; 1220 } 1221 1222 static int 1223 wpi_resume(device_t dev) 1224 { 1225 struct wpi_softc *sc = device_get_softc(dev); 1226 struct ieee80211com *ic = sc->sc_ifp->if_l2com; 1227 1228 pci_write_config(dev, 0x41, 0, 1); 1229 1230 ieee80211_resume_all(ic); 1231 return 0; 1232 } 1233 1234 /** 1235 * Called by net80211 when ever there is a change to 80211 state machine 1236 */ 1237 static int 1238 wpi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 1239 { 1240 struct wpi_vap *wvp = WPI_VAP(vap); 1241 struct ieee80211com *ic = vap->iv_ic; 1242 struct ifnet *ifp = ic->ic_ifp; 1243 struct wpi_softc *sc = ifp->if_softc; 1244 int error; 1245 1246 DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__, 1247 ieee80211_state_name[vap->iv_state], 1248 ieee80211_state_name[nstate], sc->flags)); 1249 1250 IEEE80211_UNLOCK(ic); 1251 WPI_LOCK(sc); 1252 if (nstate == IEEE80211_S_SCAN && vap->iv_state != IEEE80211_S_INIT) { 1253 /* 1254 * On !INIT -> SCAN transitions, we need to clear any possible 1255 * knowledge about associations. 1256 */ 1257 error = wpi_config(sc); 1258 if (error != 0) { 1259 device_printf(sc->sc_dev, 1260 "%s: device config failed, error %d\n", 1261 __func__, error); 1262 } 1263 } 1264 if (nstate == IEEE80211_S_AUTH || 1265 (nstate == IEEE80211_S_ASSOC && vap->iv_state == IEEE80211_S_RUN)) { 1266 /* 1267 * The node must be registered in the firmware before auth. 1268 * Also the associd must be cleared on RUN -> ASSOC 1269 * transitions. 1270 */ 1271 error = wpi_auth(sc, vap); 1272 if (error != 0) { 1273 device_printf(sc->sc_dev, 1274 "%s: could not move to auth state, error %d\n", 1275 __func__, error); 1276 } 1277 } 1278 if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) { 1279 error = wpi_run(sc, vap); 1280 if (error != 0) { 1281 device_printf(sc->sc_dev, 1282 "%s: could not move to run state, error %d\n", 1283 __func__, error); 1284 } 1285 } 1286 if (nstate == IEEE80211_S_RUN) { 1287 /* RUN -> RUN transition; just restart the timers */ 1288 wpi_calib_timeout(sc); 1289 /* XXX split out rate control timer */ 1290 } 1291 WPI_UNLOCK(sc); 1292 IEEE80211_LOCK(ic); 1293 return wvp->newstate(vap, nstate, arg); 1294 } 1295 1296 /* 1297 * Grab exclusive access to NIC memory. 1298 */ 1299 static void 1300 wpi_mem_lock(struct wpi_softc *sc) 1301 { 1302 int ntries; 1303 uint32_t tmp; 1304 1305 tmp = WPI_READ(sc, WPI_GPIO_CTL); 1306 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC); 1307 1308 /* spin until we actually get the lock */ 1309 for (ntries = 0; ntries < 100; ntries++) { 1310 if ((WPI_READ(sc, WPI_GPIO_CTL) & 1311 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK) 1312 break; 1313 DELAY(10); 1314 } 1315 if (ntries == 100) 1316 device_printf(sc->sc_dev, "could not lock memory\n"); 1317 } 1318 1319 /* 1320 * Release lock on NIC memory. 1321 */ 1322 static void 1323 wpi_mem_unlock(struct wpi_softc *sc) 1324 { 1325 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL); 1326 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC); 1327 } 1328 1329 static uint32_t 1330 wpi_mem_read(struct wpi_softc *sc, uint16_t addr) 1331 { 1332 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr); 1333 return WPI_READ(sc, WPI_READ_MEM_DATA); 1334 } 1335 1336 static void 1337 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data) 1338 { 1339 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr); 1340 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data); 1341 } 1342 1343 static void 1344 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr, 1345 const uint32_t *data, int wlen) 1346 { 1347 for (; wlen > 0; wlen--, data++, addr+=4) 1348 wpi_mem_write(sc, addr, *data); 1349 } 1350 1351 /* 1352 * Read data from the EEPROM. We access EEPROM through the MAC instead of 1353 * using the traditional bit-bang method. Data is read up until len bytes have 1354 * been obtained. 1355 */ 1356 static uint16_t 1357 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len) 1358 { 1359 int ntries; 1360 uint32_t val; 1361 uint8_t *out = data; 1362 1363 wpi_mem_lock(sc); 1364 1365 for (; len > 0; len -= 2, addr++) { 1366 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2); 1367 1368 for (ntries = 0; ntries < 10; ntries++) { 1369 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY) 1370 break; 1371 DELAY(5); 1372 } 1373 1374 if (ntries == 10) { 1375 device_printf(sc->sc_dev, "could not read EEPROM\n"); 1376 return ETIMEDOUT; 1377 } 1378 1379 *out++= val >> 16; 1380 if (len > 1) 1381 *out ++= val >> 24; 1382 } 1383 1384 wpi_mem_unlock(sc); 1385 1386 return 0; 1387 } 1388 1389 /* 1390 * The firmware text and data segments are transferred to the NIC using DMA. 1391 * The driver just copies the firmware into DMA-safe memory and tells the NIC 1392 * where to find it. Once the NIC has copied the firmware into its internal 1393 * memory, we can free our local copy in the driver. 1394 */ 1395 static int 1396 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *fw, int size) 1397 { 1398 int error, ntries; 1399 1400 DPRINTFN(WPI_DEBUG_HW,("Loading microcode size 0x%x\n", size)); 1401 1402 size /= sizeof(uint32_t); 1403 1404 wpi_mem_lock(sc); 1405 1406 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE, 1407 (const uint32_t *)fw, size); 1408 1409 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0); 1410 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT); 1411 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size); 1412 1413 /* run microcode */ 1414 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN); 1415 1416 /* wait while the adapter is busy copying the firmware */ 1417 for (error = 0, ntries = 0; ntries < 1000; ntries++) { 1418 uint32_t status = WPI_READ(sc, WPI_TX_STATUS); 1419 DPRINTFN(WPI_DEBUG_HW, 1420 ("firmware status=0x%x, val=0x%x, result=0x%x\n", status, 1421 WPI_TX_IDLE(6), status & WPI_TX_IDLE(6))); 1422 if (status & WPI_TX_IDLE(6)) { 1423 DPRINTFN(WPI_DEBUG_HW, 1424 ("Status Match! - ntries = %d\n", ntries)); 1425 break; 1426 } 1427 DELAY(10); 1428 } 1429 if (ntries == 1000) { 1430 device_printf(sc->sc_dev, "timeout transferring firmware\n"); 1431 error = ETIMEDOUT; 1432 } 1433 1434 /* start the microcode executing */ 1435 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE); 1436 1437 wpi_mem_unlock(sc); 1438 1439 return (error); 1440 } 1441 1442 static void 1443 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc, 1444 struct wpi_rx_data *data) 1445 { 1446 struct ifnet *ifp = sc->sc_ifp; 1447 struct ieee80211com *ic = ifp->if_l2com; 1448 struct wpi_rx_ring *ring = &sc->rxq; 1449 struct wpi_rx_stat *stat; 1450 struct wpi_rx_head *head; 1451 struct wpi_rx_tail *tail; 1452 struct ieee80211_node *ni; 1453 struct mbuf *m, *mnew; 1454 bus_addr_t paddr; 1455 int error; 1456 1457 stat = (struct wpi_rx_stat *)(desc + 1); 1458 1459 if (stat->len > WPI_STAT_MAXLEN) { 1460 device_printf(sc->sc_dev, "invalid rx statistic header\n"); 1461 ifp->if_ierrors++; 1462 return; 1463 } 1464 1465 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_POSTREAD); 1466 head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len); 1467 tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + le16toh(head->len)); 1468 1469 DPRINTFN(WPI_DEBUG_RX, ("rx intr: idx=%d len=%d stat len=%d rssi=%d " 1470 "rate=%x chan=%d tstamp=%ju\n", ring->cur, le32toh(desc->len), 1471 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan, 1472 (uintmax_t)le64toh(tail->tstamp))); 1473 1474 /* discard Rx frames with bad CRC early */ 1475 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) { 1476 DPRINTFN(WPI_DEBUG_RX, ("%s: rx flags error %x\n", __func__, 1477 le32toh(tail->flags))); 1478 ifp->if_ierrors++; 1479 return; 1480 } 1481 if (le16toh(head->len) < sizeof (struct ieee80211_frame)) { 1482 DPRINTFN(WPI_DEBUG_RX, ("%s: frame too short: %d\n", __func__, 1483 le16toh(head->len))); 1484 ifp->if_ierrors++; 1485 return; 1486 } 1487 1488 /* XXX don't need mbuf, just dma buffer */ 1489 mnew = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE); 1490 if (mnew == NULL) { 1491 DPRINTFN(WPI_DEBUG_RX, ("%s: no mbuf to restock ring\n", 1492 __func__)); 1493 ifp->if_ierrors++; 1494 return; 1495 } 1496 bus_dmamap_unload(ring->data_dmat, data->map); 1497 1498 error = bus_dmamap_load(ring->data_dmat, data->map, 1499 mtod(mnew, caddr_t), MJUMPAGESIZE, 1500 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT); 1501 if (error != 0 && error != EFBIG) { 1502 device_printf(sc->sc_dev, 1503 "%s: bus_dmamap_load failed, error %d\n", __func__, error); 1504 m_freem(mnew); 1505 ifp->if_ierrors++; 1506 return; 1507 } 1508 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 1509 1510 /* finalize mbuf and swap in new one */ 1511 m = data->m; 1512 m->m_pkthdr.rcvif = ifp; 1513 m->m_data = (caddr_t)(head + 1); 1514 m->m_pkthdr.len = m->m_len = le16toh(head->len); 1515 1516 data->m = mnew; 1517 /* update Rx descriptor */ 1518 ring->desc[ring->cur] = htole32(paddr); 1519 1520 if (ieee80211_radiotap_active(ic)) { 1521 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap; 1522 1523 tap->wr_flags = 0; 1524 tap->wr_chan_freq = 1525 htole16(ic->ic_channels[head->chan].ic_freq); 1526 tap->wr_chan_flags = 1527 htole16(ic->ic_channels[head->chan].ic_flags); 1528 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET); 1529 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise); 1530 tap->wr_tsft = tail->tstamp; 1531 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf; 1532 switch (head->rate) { 1533 /* CCK rates */ 1534 case 10: tap->wr_rate = 2; break; 1535 case 20: tap->wr_rate = 4; break; 1536 case 55: tap->wr_rate = 11; break; 1537 case 110: tap->wr_rate = 22; break; 1538 /* OFDM rates */ 1539 case 0xd: tap->wr_rate = 12; break; 1540 case 0xf: tap->wr_rate = 18; break; 1541 case 0x5: tap->wr_rate = 24; break; 1542 case 0x7: tap->wr_rate = 36; break; 1543 case 0x9: tap->wr_rate = 48; break; 1544 case 0xb: tap->wr_rate = 72; break; 1545 case 0x1: tap->wr_rate = 96; break; 1546 case 0x3: tap->wr_rate = 108; break; 1547 /* unknown rate: should not happen */ 1548 default: tap->wr_rate = 0; 1549 } 1550 if (le16toh(head->flags) & 0x4) 1551 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE; 1552 } 1553 1554 WPI_UNLOCK(sc); 1555 1556 ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *)); 1557 if (ni != NULL) { 1558 (void) ieee80211_input(ni, m, stat->rssi, 0); 1559 ieee80211_free_node(ni); 1560 } else 1561 (void) ieee80211_input_all(ic, m, stat->rssi, 0); 1562 1563 WPI_LOCK(sc); 1564 } 1565 1566 static void 1567 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1568 { 1569 struct ifnet *ifp = sc->sc_ifp; 1570 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3]; 1571 struct wpi_tx_data *txdata = &ring->data[desc->idx]; 1572 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1); 1573 struct ieee80211_node *ni = txdata->ni; 1574 struct ieee80211vap *vap = ni->ni_vap; 1575 int retrycnt = 0; 1576 1577 DPRINTFN(WPI_DEBUG_TX, ("tx done: qid=%d idx=%d retries=%d nkill=%d " 1578 "rate=%x duration=%d status=%x\n", desc->qid, desc->idx, 1579 stat->ntries, stat->nkill, stat->rate, le32toh(stat->duration), 1580 le32toh(stat->status))); 1581 1582 /* 1583 * Update rate control statistics for the node. 1584 * XXX we should not count mgmt frames since they're always sent at 1585 * the lowest available bit-rate. 1586 * XXX frames w/o ACK shouldn't be used either 1587 */ 1588 if (stat->ntries > 0) { 1589 DPRINTFN(WPI_DEBUG_TX, ("%d retries\n", stat->ntries)); 1590 retrycnt = 1; 1591 } 1592 ieee80211_ratectl_tx_complete(vap, ni, IEEE80211_RATECTL_TX_SUCCESS, 1593 &retrycnt, NULL); 1594 1595 /* XXX oerrors should only count errors !maxtries */ 1596 if ((le32toh(stat->status) & 0xff) != 1) 1597 ifp->if_oerrors++; 1598 else 1599 ifp->if_opackets++; 1600 1601 bus_dmamap_sync(ring->data_dmat, txdata->map, BUS_DMASYNC_POSTWRITE); 1602 bus_dmamap_unload(ring->data_dmat, txdata->map); 1603 /* XXX handle M_TXCB? */ 1604 m_freem(txdata->m); 1605 txdata->m = NULL; 1606 ieee80211_free_node(txdata->ni); 1607 txdata->ni = NULL; 1608 1609 ring->queued--; 1610 1611 sc->sc_tx_timer = 0; 1612 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1613 wpi_start_locked(ifp); 1614 } 1615 1616 static void 1617 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc) 1618 { 1619 struct wpi_tx_ring *ring = &sc->cmdq; 1620 struct wpi_tx_data *data; 1621 1622 DPRINTFN(WPI_DEBUG_CMD, ("cmd notification qid=%x idx=%d flags=%x " 1623 "type=%s len=%d\n", desc->qid, desc->idx, 1624 desc->flags, wpi_cmd_str(desc->type), 1625 le32toh(desc->len))); 1626 1627 if ((desc->qid & 7) != 4) 1628 return; /* not a command ack */ 1629 1630 data = &ring->data[desc->idx]; 1631 1632 /* if the command was mapped in a mbuf, free it */ 1633 if (data->m != NULL) { 1634 bus_dmamap_unload(ring->data_dmat, data->map); 1635 m_freem(data->m); 1636 data->m = NULL; 1637 } 1638 1639 sc->flags &= ~WPI_FLAG_BUSY; 1640 wakeup(&ring->cmd[desc->idx]); 1641 } 1642 1643 static void 1644 wpi_notif_intr(struct wpi_softc *sc) 1645 { 1646 struct ifnet *ifp = sc->sc_ifp; 1647 struct ieee80211com *ic = ifp->if_l2com; 1648 struct wpi_rx_desc *desc; 1649 struct wpi_rx_data *data; 1650 uint32_t hw; 1651 1652 bus_dmamap_sync(sc->shared_dma.tag, sc->shared_dma.map, 1653 BUS_DMASYNC_POSTREAD); 1654 1655 hw = le32toh(sc->shared->next); 1656 while (sc->rxq.cur != hw) { 1657 data = &sc->rxq.data[sc->rxq.cur]; 1658 1659 bus_dmamap_sync(sc->rxq.data_dmat, data->map, 1660 BUS_DMASYNC_POSTREAD); 1661 desc = (void *)data->m->m_ext.ext_buf; 1662 1663 DPRINTFN(WPI_DEBUG_NOTIFY, 1664 ("notify qid=%x idx=%d flags=%x type=%d len=%d\n", 1665 desc->qid, 1666 desc->idx, 1667 desc->flags, 1668 desc->type, 1669 le32toh(desc->len))); 1670 1671 if (!(desc->qid & 0x80)) /* reply to a command */ 1672 wpi_cmd_intr(sc, desc); 1673 1674 switch (desc->type) { 1675 case WPI_RX_DONE: 1676 /* a 802.11 frame was received */ 1677 wpi_rx_intr(sc, desc, data); 1678 break; 1679 1680 case WPI_TX_DONE: 1681 /* a 802.11 frame has been transmitted */ 1682 wpi_tx_intr(sc, desc); 1683 break; 1684 1685 case WPI_UC_READY: 1686 { 1687 struct wpi_ucode_info *uc = 1688 (struct wpi_ucode_info *)(desc + 1); 1689 1690 /* the microcontroller is ready */ 1691 DPRINTF(("microcode alive notification version %x " 1692 "alive %x\n", le32toh(uc->version), 1693 le32toh(uc->valid))); 1694 1695 if (le32toh(uc->valid) != 1) { 1696 device_printf(sc->sc_dev, 1697 "microcontroller initialization failed\n"); 1698 wpi_stop_locked(sc); 1699 } 1700 break; 1701 } 1702 case WPI_STATE_CHANGED: 1703 { 1704 uint32_t *status = (uint32_t *)(desc + 1); 1705 1706 /* enabled/disabled notification */ 1707 DPRINTF(("state changed to %x\n", le32toh(*status))); 1708 1709 if (le32toh(*status) & 1) { 1710 device_printf(sc->sc_dev, 1711 "Radio transmitter is switched off\n"); 1712 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 1713 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1714 /* Disable firmware commands */ 1715 WPI_WRITE(sc, WPI_UCODE_SET, WPI_DISABLE_CMD); 1716 } 1717 break; 1718 } 1719 case WPI_START_SCAN: 1720 { 1721 #ifdef WPI_DEBUG 1722 struct wpi_start_scan *scan = 1723 (struct wpi_start_scan *)(desc + 1); 1724 #endif 1725 1726 DPRINTFN(WPI_DEBUG_SCANNING, 1727 ("scanning channel %d status %x\n", 1728 scan->chan, le32toh(scan->status))); 1729 break; 1730 } 1731 case WPI_STOP_SCAN: 1732 { 1733 #ifdef WPI_DEBUG 1734 struct wpi_stop_scan *scan = 1735 (struct wpi_stop_scan *)(desc + 1); 1736 #endif 1737 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1738 1739 DPRINTFN(WPI_DEBUG_SCANNING, 1740 ("scan finished nchan=%d status=%d chan=%d\n", 1741 scan->nchan, scan->status, scan->chan)); 1742 1743 sc->sc_scan_timer = 0; 1744 ieee80211_scan_next(vap); 1745 break; 1746 } 1747 case WPI_MISSED_BEACON: 1748 { 1749 struct wpi_missed_beacon *beacon = 1750 (struct wpi_missed_beacon *)(desc + 1); 1751 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1752 1753 if (le32toh(beacon->consecutive) >= 1754 vap->iv_bmissthreshold) { 1755 DPRINTF(("Beacon miss: %u >= %u\n", 1756 le32toh(beacon->consecutive), 1757 vap->iv_bmissthreshold)); 1758 ieee80211_beacon_miss(ic); 1759 } 1760 break; 1761 } 1762 } 1763 1764 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT; 1765 } 1766 1767 /* tell the firmware what we have processed */ 1768 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1; 1769 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7); 1770 } 1771 1772 static void 1773 wpi_intr(void *arg) 1774 { 1775 struct wpi_softc *sc = arg; 1776 uint32_t r; 1777 1778 WPI_LOCK(sc); 1779 1780 r = WPI_READ(sc, WPI_INTR); 1781 if (r == 0 || r == 0xffffffff) { 1782 WPI_UNLOCK(sc); 1783 return; 1784 } 1785 1786 /* disable interrupts */ 1787 WPI_WRITE(sc, WPI_MASK, 0); 1788 /* ack interrupts */ 1789 WPI_WRITE(sc, WPI_INTR, r); 1790 1791 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) { 1792 struct ifnet *ifp = sc->sc_ifp; 1793 struct ieee80211com *ic = ifp->if_l2com; 1794 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 1795 1796 device_printf(sc->sc_dev, "fatal firmware error\n"); 1797 DPRINTFN(6,("(%s)\n", (r & WPI_SW_ERROR) ? "(Software Error)" : 1798 "(Hardware Error)")); 1799 if (vap != NULL) 1800 ieee80211_cancel_scan(vap); 1801 ieee80211_runtask(ic, &sc->sc_restarttask); 1802 sc->flags &= ~WPI_FLAG_BUSY; 1803 WPI_UNLOCK(sc); 1804 return; 1805 } 1806 1807 if (r & WPI_RX_INTR) 1808 wpi_notif_intr(sc); 1809 1810 if (r & WPI_ALIVE_INTR) /* firmware initialized */ 1811 wakeup(sc); 1812 1813 /* re-enable interrupts */ 1814 if (sc->sc_ifp->if_flags & IFF_UP) 1815 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 1816 1817 WPI_UNLOCK(sc); 1818 } 1819 1820 static uint8_t 1821 wpi_plcp_signal(int rate) 1822 { 1823 switch (rate) { 1824 /* CCK rates (returned values are device-dependent) */ 1825 case 2: return 10; 1826 case 4: return 20; 1827 case 11: return 55; 1828 case 22: return 110; 1829 1830 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */ 1831 /* R1-R4 (ral/ural is R4-R1) */ 1832 case 12: return 0xd; 1833 case 18: return 0xf; 1834 case 24: return 0x5; 1835 case 36: return 0x7; 1836 case 48: return 0x9; 1837 case 72: return 0xb; 1838 case 96: return 0x1; 1839 case 108: return 0x3; 1840 1841 /* unsupported rates (should not get there) */ 1842 default: return 0; 1843 } 1844 } 1845 1846 /* quickly determine if a given rate is CCK or OFDM */ 1847 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22) 1848 1849 /* 1850 * Construct the data packet for a transmit buffer and acutally put 1851 * the buffer onto the transmit ring, kicking the card to process the 1852 * the buffer. 1853 */ 1854 static int 1855 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni, 1856 int ac) 1857 { 1858 struct ieee80211vap *vap = ni->ni_vap; 1859 struct ifnet *ifp = sc->sc_ifp; 1860 struct ieee80211com *ic = ifp->if_l2com; 1861 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams; 1862 struct wpi_tx_ring *ring = &sc->txq[ac]; 1863 struct wpi_tx_desc *desc; 1864 struct wpi_tx_data *data; 1865 struct wpi_tx_cmd *cmd; 1866 struct wpi_cmd_data *tx; 1867 struct ieee80211_frame *wh; 1868 const struct ieee80211_txparam *tp; 1869 struct ieee80211_key *k; 1870 struct mbuf *mnew; 1871 int i, error, nsegs, rate, hdrlen, ismcast; 1872 bus_dma_segment_t segs[WPI_MAX_SCATTER]; 1873 1874 desc = &ring->desc[ring->cur]; 1875 data = &ring->data[ring->cur]; 1876 1877 wh = mtod(m0, struct ieee80211_frame *); 1878 1879 hdrlen = ieee80211_hdrsize(wh); 1880 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1); 1881 1882 if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 1883 k = ieee80211_crypto_encap(ni, m0); 1884 if (k == NULL) { 1885 m_freem(m0); 1886 return ENOBUFS; 1887 } 1888 /* packet header may have moved, reset our local pointer */ 1889 wh = mtod(m0, struct ieee80211_frame *); 1890 } 1891 1892 cmd = &ring->cmd[ring->cur]; 1893 cmd->code = WPI_CMD_TX_DATA; 1894 cmd->flags = 0; 1895 cmd->qid = ring->qid; 1896 cmd->idx = ring->cur; 1897 1898 tx = (struct wpi_cmd_data *)cmd->data; 1899 tx->flags = htole32(WPI_TX_AUTO_SEQ); 1900 tx->timeout = htole16(0); 1901 tx->ofdm_mask = 0xff; 1902 tx->cck_mask = 0x0f; 1903 tx->lifetime = htole32(WPI_LIFETIME_INFINITE); 1904 tx->id = ismcast ? WPI_ID_BROADCAST : WPI_ID_BSS; 1905 tx->len = htole16(m0->m_pkthdr.len); 1906 1907 if (!ismcast) { 1908 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0 || 1909 !cap->cap_wmeParams[ac].wmep_noackPolicy) 1910 tx->flags |= htole32(WPI_TX_NEED_ACK); 1911 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) { 1912 tx->flags |= htole32(WPI_TX_NEED_RTS|WPI_TX_FULL_TXOP); 1913 tx->rts_ntries = 7; 1914 } 1915 } 1916 /* pick a rate */ 1917 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)]; 1918 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) { 1919 uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 1920 /* tell h/w to set timestamp in probe responses */ 1921 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1922 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP); 1923 if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ || 1924 subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) 1925 tx->timeout = htole16(3); 1926 else 1927 tx->timeout = htole16(2); 1928 rate = tp->mgmtrate; 1929 } else if (ismcast) { 1930 rate = tp->mcastrate; 1931 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) { 1932 rate = tp->ucastrate; 1933 } else { 1934 (void) ieee80211_ratectl_rate(ni, NULL, 0); 1935 rate = ni->ni_txrate; 1936 } 1937 tx->rate = wpi_plcp_signal(rate); 1938 1939 /* be very persistant at sending frames out */ 1940 #if 0 1941 tx->data_ntries = tp->maxretry; 1942 #else 1943 tx->data_ntries = 15; /* XXX way too high */ 1944 #endif 1945 1946 if (ieee80211_radiotap_active_vap(vap)) { 1947 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap; 1948 tap->wt_flags = 0; 1949 tap->wt_rate = rate; 1950 tap->wt_hwqueue = ac; 1951 if (wh->i_fc[1] & IEEE80211_FC1_WEP) 1952 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP; 1953 1954 ieee80211_radiotap_tx(vap, m0); 1955 } 1956 1957 /* save and trim IEEE802.11 header */ 1958 m_copydata(m0, 0, hdrlen, (caddr_t)&tx->wh); 1959 m_adj(m0, hdrlen); 1960 1961 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m0, segs, 1962 &nsegs, BUS_DMA_NOWAIT); 1963 if (error != 0 && error != EFBIG) { 1964 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n", 1965 error); 1966 m_freem(m0); 1967 return error; 1968 } 1969 if (error != 0) { 1970 /* XXX use m_collapse */ 1971 mnew = m_defrag(m0, M_NOWAIT); 1972 if (mnew == NULL) { 1973 device_printf(sc->sc_dev, 1974 "could not defragment mbuf\n"); 1975 m_freem(m0); 1976 return ENOBUFS; 1977 } 1978 m0 = mnew; 1979 1980 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, 1981 m0, segs, &nsegs, BUS_DMA_NOWAIT); 1982 if (error != 0) { 1983 device_printf(sc->sc_dev, 1984 "could not map mbuf (error %d)\n", error); 1985 m_freem(m0); 1986 return error; 1987 } 1988 } 1989 1990 data->m = m0; 1991 data->ni = ni; 1992 1993 DPRINTFN(WPI_DEBUG_TX, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n", 1994 ring->qid, ring->cur, m0->m_pkthdr.len, nsegs)); 1995 1996 /* first scatter/gather segment is used by the tx data command */ 1997 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 1998 (1 + nsegs) << 24); 1999 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2000 ring->cur * sizeof (struct wpi_tx_cmd)); 2001 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data)); 2002 for (i = 1; i <= nsegs; i++) { 2003 desc->segs[i].addr = htole32(segs[i - 1].ds_addr); 2004 desc->segs[i].len = htole32(segs[i - 1].ds_len); 2005 } 2006 2007 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2008 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2009 BUS_DMASYNC_PREWRITE); 2010 2011 ring->queued++; 2012 2013 /* kick ring */ 2014 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT; 2015 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2016 2017 return 0; 2018 } 2019 2020 /** 2021 * Process data waiting to be sent on the IFNET output queue 2022 */ 2023 static void 2024 wpi_start(struct ifnet *ifp) 2025 { 2026 struct wpi_softc *sc = ifp->if_softc; 2027 2028 WPI_LOCK(sc); 2029 wpi_start_locked(ifp); 2030 WPI_UNLOCK(sc); 2031 } 2032 2033 static void 2034 wpi_start_locked(struct ifnet *ifp) 2035 { 2036 struct wpi_softc *sc = ifp->if_softc; 2037 struct ieee80211_node *ni; 2038 struct mbuf *m; 2039 int ac; 2040 2041 WPI_LOCK_ASSERT(sc); 2042 2043 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 2044 return; 2045 2046 for (;;) { 2047 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 2048 if (m == NULL) 2049 break; 2050 ac = M_WME_GETAC(m); 2051 if (sc->txq[ac].queued > sc->txq[ac].count - 8) { 2052 /* there is no place left in this ring */ 2053 IFQ_DRV_PREPEND(&ifp->if_snd, m); 2054 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2055 break; 2056 } 2057 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif; 2058 if (wpi_tx_data(sc, m, ni, ac) != 0) { 2059 ieee80211_free_node(ni); 2060 ifp->if_oerrors++; 2061 break; 2062 } 2063 sc->sc_tx_timer = 5; 2064 } 2065 } 2066 2067 static int 2068 wpi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m, 2069 const struct ieee80211_bpf_params *params) 2070 { 2071 struct ieee80211com *ic = ni->ni_ic; 2072 struct ifnet *ifp = ic->ic_ifp; 2073 struct wpi_softc *sc = ifp->if_softc; 2074 2075 /* prevent management frames from being sent if we're not ready */ 2076 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2077 m_freem(m); 2078 ieee80211_free_node(ni); 2079 return ENETDOWN; 2080 } 2081 WPI_LOCK(sc); 2082 2083 /* management frames go into ring 0 */ 2084 if (sc->txq[0].queued > sc->txq[0].count - 8) { 2085 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 2086 m_freem(m); 2087 WPI_UNLOCK(sc); 2088 ieee80211_free_node(ni); 2089 return ENOBUFS; /* XXX */ 2090 } 2091 2092 ifp->if_opackets++; 2093 if (wpi_tx_data(sc, m, ni, 0) != 0) 2094 goto bad; 2095 sc->sc_tx_timer = 5; 2096 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 2097 2098 WPI_UNLOCK(sc); 2099 return 0; 2100 bad: 2101 ifp->if_oerrors++; 2102 WPI_UNLOCK(sc); 2103 ieee80211_free_node(ni); 2104 return EIO; /* XXX */ 2105 } 2106 2107 static int 2108 wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 2109 { 2110 struct wpi_softc *sc = ifp->if_softc; 2111 struct ieee80211com *ic = ifp->if_l2com; 2112 struct ifreq *ifr = (struct ifreq *) data; 2113 int error = 0, startall = 0; 2114 2115 switch (cmd) { 2116 case SIOCSIFFLAGS: 2117 WPI_LOCK(sc); 2118 if ((ifp->if_flags & IFF_UP)) { 2119 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { 2120 wpi_init_locked(sc, 0); 2121 startall = 1; 2122 } 2123 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) || 2124 (sc->flags & WPI_FLAG_HW_RADIO_OFF)) 2125 wpi_stop_locked(sc); 2126 WPI_UNLOCK(sc); 2127 if (startall) 2128 ieee80211_start_all(ic); 2129 break; 2130 case SIOCGIFMEDIA: 2131 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd); 2132 break; 2133 case SIOCGIFADDR: 2134 error = ether_ioctl(ifp, cmd, data); 2135 break; 2136 default: 2137 error = EINVAL; 2138 break; 2139 } 2140 return error; 2141 } 2142 2143 /* 2144 * Extract various information from EEPROM. 2145 */ 2146 static void 2147 wpi_read_eeprom(struct wpi_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN]) 2148 { 2149 int i; 2150 2151 /* read the hardware capabilities, revision and SKU type */ 2152 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap,1); 2153 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev,2); 2154 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1); 2155 2156 /* read the regulatory domain */ 2157 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, sc->domain, 4); 2158 2159 /* read in the hw MAC address */ 2160 wpi_read_prom_data(sc, WPI_EEPROM_MAC, macaddr, 6); 2161 2162 /* read the list of authorized channels */ 2163 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++) 2164 wpi_read_eeprom_channels(sc,i); 2165 2166 /* read the power level calibration info for each group */ 2167 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++) 2168 wpi_read_eeprom_group(sc,i); 2169 } 2170 2171 /* 2172 * Send a command to the firmware. 2173 */ 2174 static int 2175 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async) 2176 { 2177 struct wpi_tx_ring *ring = &sc->cmdq; 2178 struct wpi_tx_desc *desc; 2179 struct wpi_tx_cmd *cmd; 2180 2181 #ifdef WPI_DEBUG 2182 if (!async) { 2183 WPI_LOCK_ASSERT(sc); 2184 } 2185 #endif 2186 2187 DPRINTFN(WPI_DEBUG_CMD,("wpi_cmd %d size %d async %d\n", code, size, 2188 async)); 2189 2190 if (sc->flags & WPI_FLAG_BUSY) { 2191 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n", 2192 __func__, code); 2193 return EAGAIN; 2194 } 2195 sc->flags|= WPI_FLAG_BUSY; 2196 2197 KASSERT(size <= sizeof cmd->data, ("command %d too large: %d bytes", 2198 code, size)); 2199 2200 desc = &ring->desc[ring->cur]; 2201 cmd = &ring->cmd[ring->cur]; 2202 2203 cmd->code = code; 2204 cmd->flags = 0; 2205 cmd->qid = ring->qid; 2206 cmd->idx = ring->cur; 2207 memcpy(cmd->data, buf, size); 2208 2209 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24); 2210 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2211 ring->cur * sizeof (struct wpi_tx_cmd)); 2212 desc->segs[0].len = htole32(4 + size); 2213 2214 /* kick cmd ring */ 2215 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2216 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2217 2218 if (async) { 2219 sc->flags &= ~ WPI_FLAG_BUSY; 2220 return 0; 2221 } 2222 2223 return msleep(cmd, &sc->sc_mtx, PCATCH, "wpicmd", hz); 2224 } 2225 2226 static int 2227 wpi_wme_update(struct ieee80211com *ic) 2228 { 2229 #define WPI_EXP2(v) htole16((1 << (v)) - 1) 2230 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v)) 2231 struct wpi_softc *sc = ic->ic_ifp->if_softc; 2232 const struct wmeParams *wmep; 2233 struct wpi_wme_setup wme; 2234 int ac; 2235 2236 /* don't override default WME values if WME is not actually enabled */ 2237 if (!(ic->ic_flags & IEEE80211_F_WME)) 2238 return 0; 2239 2240 wme.flags = 0; 2241 for (ac = 0; ac < WME_NUM_AC; ac++) { 2242 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac]; 2243 wme.ac[ac].aifsn = wmep->wmep_aifsn; 2244 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin); 2245 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax); 2246 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit); 2247 2248 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d " 2249 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin, 2250 wme.ac[ac].cwmax, wme.ac[ac].txop)); 2251 } 2252 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1); 2253 #undef WPI_USEC 2254 #undef WPI_EXP2 2255 } 2256 2257 /* 2258 * Configure h/w multi-rate retries. 2259 */ 2260 static int 2261 wpi_mrr_setup(struct wpi_softc *sc) 2262 { 2263 struct ifnet *ifp = sc->sc_ifp; 2264 struct ieee80211com *ic = ifp->if_l2com; 2265 struct wpi_mrr_setup mrr; 2266 int i, error; 2267 2268 memset(&mrr, 0, sizeof (struct wpi_mrr_setup)); 2269 2270 /* CCK rates (not used with 802.11a) */ 2271 for (i = WPI_CCK1; i <= WPI_CCK11; i++) { 2272 mrr.rates[i].flags = 0; 2273 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2274 /* fallback to the immediate lower CCK rate (if any) */ 2275 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1; 2276 /* try one time at this rate before falling back to "next" */ 2277 mrr.rates[i].ntries = 1; 2278 } 2279 2280 /* OFDM rates (not used with 802.11b) */ 2281 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) { 2282 mrr.rates[i].flags = 0; 2283 mrr.rates[i].signal = wpi_ridx_to_plcp[i]; 2284 /* fallback to the immediate lower OFDM rate (if any) */ 2285 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */ 2286 mrr.rates[i].next = (i == WPI_OFDM6) ? 2287 ((ic->ic_curmode == IEEE80211_MODE_11A) ? 2288 WPI_OFDM6 : WPI_CCK2) : 2289 i - 1; 2290 /* try one time at this rate before falling back to "next" */ 2291 mrr.rates[i].ntries = 1; 2292 } 2293 2294 /* setup MRR for control frames */ 2295 mrr.which = WPI_MRR_CTL; 2296 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2297 if (error != 0) { 2298 device_printf(sc->sc_dev, 2299 "could not setup MRR for control frames\n"); 2300 return error; 2301 } 2302 2303 /* setup MRR for data frames */ 2304 mrr.which = WPI_MRR_DATA; 2305 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0); 2306 if (error != 0) { 2307 device_printf(sc->sc_dev, 2308 "could not setup MRR for data frames\n"); 2309 return error; 2310 } 2311 2312 return 0; 2313 } 2314 2315 static void 2316 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on) 2317 { 2318 struct wpi_cmd_led led; 2319 2320 led.which = which; 2321 led.unit = htole32(100000); /* on/off in unit of 100ms */ 2322 led.off = off; 2323 led.on = on; 2324 2325 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1); 2326 } 2327 2328 static void 2329 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni) 2330 { 2331 struct wpi_cmd_tsf tsf; 2332 uint64_t val, mod; 2333 2334 memset(&tsf, 0, sizeof tsf); 2335 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8); 2336 tsf.bintval = htole16(ni->ni_intval); 2337 tsf.lintval = htole16(10); 2338 2339 /* compute remaining time until next beacon */ 2340 val = (uint64_t)ni->ni_intval * 1024; /* msec -> usec */ 2341 mod = le64toh(tsf.tstamp) % val; 2342 tsf.binitval = htole32((uint32_t)(val - mod)); 2343 2344 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0) 2345 device_printf(sc->sc_dev, "could not enable TSF\n"); 2346 } 2347 2348 #if 0 2349 /* 2350 * Build a beacon frame that the firmware will broadcast periodically in 2351 * IBSS or HostAP modes. 2352 */ 2353 static int 2354 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni) 2355 { 2356 struct ifnet *ifp = sc->sc_ifp; 2357 struct ieee80211com *ic = ifp->if_l2com; 2358 struct wpi_tx_ring *ring = &sc->cmdq; 2359 struct wpi_tx_desc *desc; 2360 struct wpi_tx_data *data; 2361 struct wpi_tx_cmd *cmd; 2362 struct wpi_cmd_beacon *bcn; 2363 struct ieee80211_beacon_offsets bo; 2364 struct mbuf *m0; 2365 bus_addr_t physaddr; 2366 int error; 2367 2368 desc = &ring->desc[ring->cur]; 2369 data = &ring->data[ring->cur]; 2370 2371 m0 = ieee80211_beacon_alloc(ic, ni, &bo); 2372 if (m0 == NULL) { 2373 device_printf(sc->sc_dev, "could not allocate beacon frame\n"); 2374 return ENOMEM; 2375 } 2376 2377 cmd = &ring->cmd[ring->cur]; 2378 cmd->code = WPI_CMD_SET_BEACON; 2379 cmd->flags = 0; 2380 cmd->qid = ring->qid; 2381 cmd->idx = ring->cur; 2382 2383 bcn = (struct wpi_cmd_beacon *)cmd->data; 2384 memset(bcn, 0, sizeof (struct wpi_cmd_beacon)); 2385 bcn->id = WPI_ID_BROADCAST; 2386 bcn->ofdm_mask = 0xff; 2387 bcn->cck_mask = 0x0f; 2388 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE); 2389 bcn->len = htole16(m0->m_pkthdr.len); 2390 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2391 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2392 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP); 2393 2394 /* save and trim IEEE802.11 header */ 2395 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (caddr_t)&bcn->wh); 2396 m_adj(m0, sizeof (struct ieee80211_frame)); 2397 2398 /* assume beacon frame is contiguous */ 2399 error = bus_dmamap_load(ring->data_dmat, data->map, mtod(m0, void *), 2400 m0->m_pkthdr.len, wpi_dma_map_addr, &physaddr, 0); 2401 if (error != 0) { 2402 device_printf(sc->sc_dev, "could not map beacon\n"); 2403 m_freem(m0); 2404 return error; 2405 } 2406 2407 data->m = m0; 2408 2409 /* first scatter/gather segment is used by the beacon command */ 2410 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24); 2411 desc->segs[0].addr = htole32(ring->cmd_dma.paddr + 2412 ring->cur * sizeof (struct wpi_tx_cmd)); 2413 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon)); 2414 desc->segs[1].addr = htole32(physaddr); 2415 desc->segs[1].len = htole32(m0->m_pkthdr.len); 2416 2417 /* kick cmd ring */ 2418 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2419 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2420 2421 return 0; 2422 } 2423 #endif 2424 2425 static int 2426 wpi_auth(struct wpi_softc *sc, struct ieee80211vap *vap) 2427 { 2428 struct ieee80211com *ic = vap->iv_ic; 2429 struct ieee80211_node *ni = vap->iv_bss; 2430 struct wpi_node_info node; 2431 int error; 2432 2433 2434 /* update adapter's configuration */ 2435 sc->config.associd = 0; 2436 sc->config.filter &= ~htole32(WPI_FILTER_BSS); 2437 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid); 2438 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan); 2439 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) { 2440 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2441 WPI_CONFIG_24GHZ); 2442 } else { 2443 sc->config.flags &= ~htole32(WPI_CONFIG_AUTO | 2444 WPI_CONFIG_24GHZ); 2445 } 2446 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) { 2447 sc->config.cck_mask = 0; 2448 sc->config.ofdm_mask = 0x15; 2449 } else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) { 2450 sc->config.cck_mask = 0x03; 2451 sc->config.ofdm_mask = 0; 2452 } else { 2453 /* XXX assume 802.11b/g */ 2454 sc->config.cck_mask = 0x0f; 2455 sc->config.ofdm_mask = 0x15; 2456 } 2457 2458 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan, 2459 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask)); 2460 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2461 sizeof (struct wpi_config), 1); 2462 if (error != 0) { 2463 device_printf(sc->sc_dev, "could not configure\n"); 2464 return error; 2465 } 2466 2467 /* configuration has changed, set Tx power accordingly */ 2468 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) { 2469 device_printf(sc->sc_dev, "could not set Tx power\n"); 2470 return error; 2471 } 2472 2473 /* add default node */ 2474 memset(&node, 0, sizeof node); 2475 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid); 2476 node.id = WPI_ID_BSS; 2477 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ? 2478 wpi_plcp_signal(12) : wpi_plcp_signal(2); 2479 node.action = htole32(WPI_ACTION_SET_RATE); 2480 node.antenna = WPI_ANTENNA_BOTH; 2481 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1); 2482 if (error != 0) 2483 device_printf(sc->sc_dev, "could not add BSS node\n"); 2484 2485 return (error); 2486 } 2487 2488 static int 2489 wpi_run(struct wpi_softc *sc, struct ieee80211vap *vap) 2490 { 2491 struct ieee80211com *ic = vap->iv_ic; 2492 struct ieee80211_node *ni = vap->iv_bss; 2493 int error; 2494 2495 if (vap->iv_opmode == IEEE80211_M_MONITOR) { 2496 /* link LED blinks while monitoring */ 2497 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 2498 return 0; 2499 } 2500 2501 wpi_enable_tsf(sc, ni); 2502 2503 /* update adapter's configuration */ 2504 sc->config.associd = htole16(ni->ni_associd & ~0xc000); 2505 /* short preamble/slot time are negotiated when associating */ 2506 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE | 2507 WPI_CONFIG_SHSLOT); 2508 if (ic->ic_flags & IEEE80211_F_SHSLOT) 2509 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT); 2510 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE) 2511 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE); 2512 sc->config.filter |= htole32(WPI_FILTER_BSS); 2513 2514 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */ 2515 2516 DPRINTF(("config chan %d flags %x\n", sc->config.chan, 2517 sc->config.flags)); 2518 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct 2519 wpi_config), 1); 2520 if (error != 0) { 2521 device_printf(sc->sc_dev, "could not update configuration\n"); 2522 return error; 2523 } 2524 2525 error = wpi_set_txpower(sc, ni->ni_chan, 1); 2526 if (error != 0) { 2527 device_printf(sc->sc_dev, "could set txpower\n"); 2528 return error; 2529 } 2530 2531 /* link LED always on while associated */ 2532 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 2533 2534 /* start automatic rate control timer */ 2535 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc); 2536 2537 return (error); 2538 } 2539 2540 /* 2541 * Send a scan request to the firmware. Since this command is huge, we map it 2542 * into a mbufcluster instead of using the pre-allocated set of commands. Note, 2543 * much of this code is similar to that in wpi_cmd but because we must manually 2544 * construct the probe & channels, we duplicate what's needed here. XXX In the 2545 * future, this function should be modified to use wpi_cmd to help cleanup the 2546 * code base. 2547 */ 2548 static int 2549 wpi_scan(struct wpi_softc *sc) 2550 { 2551 struct ifnet *ifp = sc->sc_ifp; 2552 struct ieee80211com *ic = ifp->if_l2com; 2553 struct ieee80211_scan_state *ss = ic->ic_scan; 2554 struct wpi_tx_ring *ring = &sc->cmdq; 2555 struct wpi_tx_desc *desc; 2556 struct wpi_tx_data *data; 2557 struct wpi_tx_cmd *cmd; 2558 struct wpi_scan_hdr *hdr; 2559 struct wpi_scan_chan *chan; 2560 struct ieee80211_frame *wh; 2561 struct ieee80211_rateset *rs; 2562 struct ieee80211_channel *c; 2563 enum ieee80211_phymode mode; 2564 uint8_t *frm; 2565 int nrates, pktlen, error, i, nssid; 2566 bus_addr_t physaddr; 2567 2568 desc = &ring->desc[ring->cur]; 2569 data = &ring->data[ring->cur]; 2570 2571 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR); 2572 if (data->m == NULL) { 2573 device_printf(sc->sc_dev, 2574 "could not allocate mbuf for scan command\n"); 2575 return ENOMEM; 2576 } 2577 2578 cmd = mtod(data->m, struct wpi_tx_cmd *); 2579 cmd->code = WPI_CMD_SCAN; 2580 cmd->flags = 0; 2581 cmd->qid = ring->qid; 2582 cmd->idx = ring->cur; 2583 2584 hdr = (struct wpi_scan_hdr *)cmd->data; 2585 memset(hdr, 0, sizeof(struct wpi_scan_hdr)); 2586 2587 /* 2588 * Move to the next channel if no packets are received within 5 msecs 2589 * after sending the probe request (this helps to reduce the duration 2590 * of active scans). 2591 */ 2592 hdr->quiet = htole16(5); 2593 hdr->threshold = htole16(1); 2594 2595 if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) { 2596 /* send probe requests at 6Mbps */ 2597 hdr->tx.rate = wpi_ridx_to_plcp[WPI_OFDM6]; 2598 2599 /* Enable crc checking */ 2600 hdr->promotion = htole16(1); 2601 } else { 2602 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO); 2603 /* send probe requests at 1Mbps */ 2604 hdr->tx.rate = wpi_ridx_to_plcp[WPI_CCK1]; 2605 } 2606 hdr->tx.id = WPI_ID_BROADCAST; 2607 hdr->tx.lifetime = htole32(WPI_LIFETIME_INFINITE); 2608 hdr->tx.flags = htole32(WPI_TX_AUTO_SEQ); 2609 2610 memset(hdr->scan_essids, 0, sizeof(hdr->scan_essids)); 2611 nssid = MIN(ss->ss_nssid, WPI_SCAN_MAX_ESSIDS); 2612 for (i = 0; i < nssid; i++) { 2613 hdr->scan_essids[i].id = IEEE80211_ELEMID_SSID; 2614 hdr->scan_essids[i].esslen = MIN(ss->ss_ssid[i].len, 32); 2615 memcpy(hdr->scan_essids[i].essid, ss->ss_ssid[i].ssid, 2616 hdr->scan_essids[i].esslen); 2617 #ifdef WPI_DEBUG 2618 if (wpi_debug & WPI_DEBUG_SCANNING) { 2619 printf("Scanning Essid: "); 2620 ieee80211_print_essid(hdr->scan_essids[i].essid, 2621 hdr->scan_essids[i].esslen); 2622 printf("\n"); 2623 } 2624 #endif 2625 } 2626 2627 /* 2628 * Build a probe request frame. Most of the following code is a 2629 * copy & paste of what is done in net80211. 2630 */ 2631 wh = (struct ieee80211_frame *)&hdr->scan_essids[4]; 2632 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT | 2633 IEEE80211_FC0_SUBTYPE_PROBE_REQ; 2634 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS; 2635 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr); 2636 IEEE80211_ADDR_COPY(wh->i_addr2, IF_LLADDR(ifp)); 2637 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr); 2638 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */ 2639 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */ 2640 2641 frm = (uint8_t *)(wh + 1); 2642 2643 /* add essid IE, the hardware will fill this in for us */ 2644 *frm++ = IEEE80211_ELEMID_SSID; 2645 *frm++ = 0; 2646 2647 mode = ieee80211_chan2mode(ic->ic_curchan); 2648 rs = &ic->ic_sup_rates[mode]; 2649 2650 /* add supported rates IE */ 2651 *frm++ = IEEE80211_ELEMID_RATES; 2652 nrates = rs->rs_nrates; 2653 if (nrates > IEEE80211_RATE_SIZE) 2654 nrates = IEEE80211_RATE_SIZE; 2655 *frm++ = nrates; 2656 memcpy(frm, rs->rs_rates, nrates); 2657 frm += nrates; 2658 2659 /* add supported xrates IE */ 2660 if (rs->rs_nrates > IEEE80211_RATE_SIZE) { 2661 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE; 2662 *frm++ = IEEE80211_ELEMID_XRATES; 2663 *frm++ = nrates; 2664 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates); 2665 frm += nrates; 2666 } 2667 2668 /* setup length of probe request */ 2669 hdr->tx.len = htole16(frm - (uint8_t *)wh); 2670 2671 /* 2672 * Construct information about the channel that we 2673 * want to scan. The firmware expects this to be directly 2674 * after the scan probe request 2675 */ 2676 c = ic->ic_curchan; 2677 chan = (struct wpi_scan_chan *)frm; 2678 chan->chan = ieee80211_chan2ieee(ic, c); 2679 chan->flags = 0; 2680 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2681 chan->flags |= WPI_CHAN_ACTIVE; 2682 if (nssid != 0) 2683 chan->flags |= WPI_CHAN_DIRECT; 2684 } 2685 chan->gain_dsp = 0x6e; /* Default level */ 2686 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2687 chan->active = htole16(10); 2688 chan->passive = htole16(ss->ss_maxdwell); 2689 chan->gain_radio = 0x3b; 2690 } else { 2691 chan->active = htole16(20); 2692 chan->passive = htole16(ss->ss_maxdwell); 2693 chan->gain_radio = 0x28; 2694 } 2695 2696 DPRINTFN(WPI_DEBUG_SCANNING, 2697 ("Scanning %u Passive: %d\n", 2698 chan->chan, 2699 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2700 2701 hdr->nchan++; 2702 chan++; 2703 2704 frm += sizeof (struct wpi_scan_chan); 2705 #if 0 2706 // XXX All Channels.... 2707 for (c = &ic->ic_channels[1]; 2708 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) { 2709 if ((c->ic_flags & ic->ic_curchan->ic_flags) != ic->ic_curchan->ic_flags) 2710 continue; 2711 2712 chan->chan = ieee80211_chan2ieee(ic, c); 2713 chan->flags = 0; 2714 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) { 2715 chan->flags |= WPI_CHAN_ACTIVE; 2716 if (ic->ic_des_ssid[0].len != 0) 2717 chan->flags |= WPI_CHAN_DIRECT; 2718 } 2719 chan->gain_dsp = 0x6e; /* Default level */ 2720 if (IEEE80211_IS_CHAN_5GHZ(c)) { 2721 chan->active = htole16(10); 2722 chan->passive = htole16(110); 2723 chan->gain_radio = 0x3b; 2724 } else { 2725 chan->active = htole16(20); 2726 chan->passive = htole16(120); 2727 chan->gain_radio = 0x28; 2728 } 2729 2730 DPRINTFN(WPI_DEBUG_SCANNING, 2731 ("Scanning %u Passive: %d\n", 2732 chan->chan, 2733 c->ic_flags & IEEE80211_CHAN_PASSIVE)); 2734 2735 hdr->nchan++; 2736 chan++; 2737 2738 frm += sizeof (struct wpi_scan_chan); 2739 } 2740 #endif 2741 2742 hdr->len = htole16(frm - (uint8_t *)hdr); 2743 pktlen = frm - (uint8_t *)cmd; 2744 2745 error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen, 2746 wpi_dma_map_addr, &physaddr, BUS_DMA_NOWAIT); 2747 if (error != 0) { 2748 device_printf(sc->sc_dev, "could not map scan command\n"); 2749 m_freem(data->m); 2750 data->m = NULL; 2751 return error; 2752 } 2753 2754 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24); 2755 desc->segs[0].addr = htole32(physaddr); 2756 desc->segs[0].len = htole32(pktlen); 2757 2758 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map, 2759 BUS_DMASYNC_PREWRITE); 2760 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE); 2761 2762 /* kick cmd ring */ 2763 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT; 2764 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur); 2765 2766 sc->sc_scan_timer = 5; 2767 return 0; /* will be notified async. of failure/success */ 2768 } 2769 2770 /** 2771 * Configure the card to listen to a particular channel, this transisions the 2772 * card in to being able to receive frames from remote devices. 2773 */ 2774 static int 2775 wpi_config(struct wpi_softc *sc) 2776 { 2777 struct ifnet *ifp = sc->sc_ifp; 2778 struct ieee80211com *ic = ifp->if_l2com; 2779 struct wpi_power power; 2780 struct wpi_bluetooth bluetooth; 2781 struct wpi_node_info node; 2782 int error; 2783 2784 /* set power mode */ 2785 memset(&power, 0, sizeof power); 2786 power.flags = htole32(WPI_POWER_CAM|0x8); 2787 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0); 2788 if (error != 0) { 2789 device_printf(sc->sc_dev, "could not set power mode\n"); 2790 return error; 2791 } 2792 2793 /* configure bluetooth coexistence */ 2794 memset(&bluetooth, 0, sizeof bluetooth); 2795 bluetooth.flags = 3; 2796 bluetooth.lead = 0xaa; 2797 bluetooth.kill = 1; 2798 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth, 2799 0); 2800 if (error != 0) { 2801 device_printf(sc->sc_dev, 2802 "could not configure bluetooth coexistence\n"); 2803 return error; 2804 } 2805 2806 /* configure adapter */ 2807 memset(&sc->config, 0, sizeof (struct wpi_config)); 2808 IEEE80211_ADDR_COPY(sc->config.myaddr, IF_LLADDR(ifp)); 2809 /*set default channel*/ 2810 sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan)); 2811 sc->config.flags = htole32(WPI_CONFIG_TSF); 2812 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) { 2813 sc->config.flags |= htole32(WPI_CONFIG_AUTO | 2814 WPI_CONFIG_24GHZ); 2815 } 2816 sc->config.filter = 0; 2817 switch (ic->ic_opmode) { 2818 case IEEE80211_M_STA: 2819 case IEEE80211_M_WDS: /* No know setup, use STA for now */ 2820 sc->config.mode = WPI_MODE_STA; 2821 sc->config.filter |= htole32(WPI_FILTER_MULTICAST); 2822 break; 2823 case IEEE80211_M_IBSS: 2824 case IEEE80211_M_AHDEMO: 2825 sc->config.mode = WPI_MODE_IBSS; 2826 sc->config.filter |= htole32(WPI_FILTER_BEACON | 2827 WPI_FILTER_MULTICAST); 2828 break; 2829 case IEEE80211_M_HOSTAP: 2830 sc->config.mode = WPI_MODE_HOSTAP; 2831 break; 2832 case IEEE80211_M_MONITOR: 2833 sc->config.mode = WPI_MODE_MONITOR; 2834 sc->config.filter |= htole32(WPI_FILTER_MULTICAST | 2835 WPI_FILTER_CTL | WPI_FILTER_PROMISC); 2836 break; 2837 default: 2838 device_printf(sc->sc_dev, "unknown opmode %d\n", ic->ic_opmode); 2839 return EINVAL; 2840 } 2841 sc->config.cck_mask = 0x0f; /* not yet negotiated */ 2842 sc->config.ofdm_mask = 0xff; /* not yet negotiated */ 2843 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, 2844 sizeof (struct wpi_config), 0); 2845 if (error != 0) { 2846 device_printf(sc->sc_dev, "configure command failed\n"); 2847 return error; 2848 } 2849 2850 /* configuration has changed, set Tx power accordingly */ 2851 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) { 2852 device_printf(sc->sc_dev, "could not set Tx power\n"); 2853 return error; 2854 } 2855 2856 /* add broadcast node */ 2857 memset(&node, 0, sizeof node); 2858 IEEE80211_ADDR_COPY(node.bssid, ifp->if_broadcastaddr); 2859 node.id = WPI_ID_BROADCAST; 2860 node.rate = wpi_plcp_signal(2); 2861 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0); 2862 if (error != 0) { 2863 device_printf(sc->sc_dev, "could not add broadcast node\n"); 2864 return error; 2865 } 2866 2867 /* Setup rate scalling */ 2868 error = wpi_mrr_setup(sc); 2869 if (error != 0) { 2870 device_printf(sc->sc_dev, "could not setup MRR\n"); 2871 return error; 2872 } 2873 2874 return 0; 2875 } 2876 2877 static void 2878 wpi_stop_master(struct wpi_softc *sc) 2879 { 2880 uint32_t tmp; 2881 int ntries; 2882 2883 DPRINTFN(WPI_DEBUG_HW,("Disabling Firmware execution\n")); 2884 2885 tmp = WPI_READ(sc, WPI_RESET); 2886 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER | WPI_NEVO_RESET); 2887 2888 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2889 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP) 2890 return; /* already asleep */ 2891 2892 for (ntries = 0; ntries < 100; ntries++) { 2893 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED) 2894 break; 2895 DELAY(10); 2896 } 2897 if (ntries == 100) { 2898 device_printf(sc->sc_dev, "timeout waiting for master\n"); 2899 } 2900 } 2901 2902 static int 2903 wpi_power_up(struct wpi_softc *sc) 2904 { 2905 uint32_t tmp; 2906 int ntries; 2907 2908 wpi_mem_lock(sc); 2909 tmp = wpi_mem_read(sc, WPI_MEM_POWER); 2910 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000); 2911 wpi_mem_unlock(sc); 2912 2913 for (ntries = 0; ntries < 5000; ntries++) { 2914 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED) 2915 break; 2916 DELAY(10); 2917 } 2918 if (ntries == 5000) { 2919 device_printf(sc->sc_dev, 2920 "timeout waiting for NIC to power up\n"); 2921 return ETIMEDOUT; 2922 } 2923 return 0; 2924 } 2925 2926 static int 2927 wpi_reset(struct wpi_softc *sc) 2928 { 2929 uint32_t tmp; 2930 int ntries; 2931 2932 DPRINTFN(WPI_DEBUG_HW, 2933 ("Resetting the card - clearing any uploaded firmware\n")); 2934 2935 /* clear any pending interrupts */ 2936 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 2937 2938 tmp = WPI_READ(sc, WPI_PLL_CTL); 2939 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT); 2940 2941 tmp = WPI_READ(sc, WPI_CHICKEN); 2942 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS); 2943 2944 tmp = WPI_READ(sc, WPI_GPIO_CTL); 2945 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT); 2946 2947 /* wait for clock stabilization */ 2948 for (ntries = 0; ntries < 25000; ntries++) { 2949 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK) 2950 break; 2951 DELAY(10); 2952 } 2953 if (ntries == 25000) { 2954 device_printf(sc->sc_dev, 2955 "timeout waiting for clock stabilization\n"); 2956 return ETIMEDOUT; 2957 } 2958 2959 /* initialize EEPROM */ 2960 tmp = WPI_READ(sc, WPI_EEPROM_STATUS); 2961 2962 if ((tmp & WPI_EEPROM_VERSION) == 0) { 2963 device_printf(sc->sc_dev, "EEPROM not found\n"); 2964 return EIO; 2965 } 2966 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED); 2967 2968 return 0; 2969 } 2970 2971 static void 2972 wpi_hw_config(struct wpi_softc *sc) 2973 { 2974 uint32_t rev, hw; 2975 2976 /* voodoo from the Linux "driver".. */ 2977 hw = WPI_READ(sc, WPI_HWCONFIG); 2978 2979 rev = pci_read_config(sc->sc_dev, PCIR_REVID, 1); 2980 if ((rev & 0xc0) == 0x40) 2981 hw |= WPI_HW_ALM_MB; 2982 else if (!(rev & 0x80)) 2983 hw |= WPI_HW_ALM_MM; 2984 2985 if (sc->cap == 0x80) 2986 hw |= WPI_HW_SKU_MRC; 2987 2988 hw &= ~WPI_HW_REV_D; 2989 if ((le16toh(sc->rev) & 0xf0) == 0xd0) 2990 hw |= WPI_HW_REV_D; 2991 2992 if (sc->type > 1) 2993 hw |= WPI_HW_TYPE_B; 2994 2995 WPI_WRITE(sc, WPI_HWCONFIG, hw); 2996 } 2997 2998 static void 2999 wpi_rfkill_resume(struct wpi_softc *sc) 3000 { 3001 struct ifnet *ifp = sc->sc_ifp; 3002 struct ieee80211com *ic = ifp->if_l2com; 3003 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3004 int ntries; 3005 3006 /* enable firmware again */ 3007 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3008 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3009 3010 /* wait for thermal sensors to calibrate */ 3011 for (ntries = 0; ntries < 1000; ntries++) { 3012 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3013 break; 3014 DELAY(10); 3015 } 3016 3017 if (ntries == 1000) { 3018 device_printf(sc->sc_dev, 3019 "timeout waiting for thermal calibration\n"); 3020 return; 3021 } 3022 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3023 3024 if (wpi_config(sc) != 0) { 3025 device_printf(sc->sc_dev, "device config failed\n"); 3026 return; 3027 } 3028 3029 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 3030 ifp->if_drv_flags |= IFF_DRV_RUNNING; 3031 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3032 3033 if (vap != NULL) { 3034 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 3035 if (vap->iv_opmode != IEEE80211_M_MONITOR) { 3036 ieee80211_beacon_miss(ic); 3037 wpi_set_led(sc, WPI_LED_LINK, 0, 1); 3038 } else 3039 wpi_set_led(sc, WPI_LED_LINK, 5, 5); 3040 } else { 3041 ieee80211_scan_next(vap); 3042 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3043 } 3044 } 3045 3046 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3047 } 3048 3049 static void 3050 wpi_init_locked(struct wpi_softc *sc, int force) 3051 { 3052 struct ifnet *ifp = sc->sc_ifp; 3053 uint32_t tmp; 3054 int ntries, qid; 3055 3056 wpi_stop_locked(sc); 3057 (void)wpi_reset(sc); 3058 3059 wpi_mem_lock(sc); 3060 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00); 3061 DELAY(20); 3062 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV); 3063 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800); 3064 wpi_mem_unlock(sc); 3065 3066 (void)wpi_power_up(sc); 3067 wpi_hw_config(sc); 3068 3069 /* init Rx ring */ 3070 wpi_mem_lock(sc); 3071 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr); 3072 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr + 3073 offsetof(struct wpi_shared, next)); 3074 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7); 3075 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010); 3076 wpi_mem_unlock(sc); 3077 3078 /* init Tx rings */ 3079 wpi_mem_lock(sc); 3080 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */ 3081 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */ 3082 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */ 3083 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000); 3084 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002); 3085 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4); 3086 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5); 3087 3088 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr); 3089 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5); 3090 3091 for (qid = 0; qid < 6; qid++) { 3092 WPI_WRITE(sc, WPI_TX_CTL(qid), 0); 3093 WPI_WRITE(sc, WPI_TX_BASE(qid), 0); 3094 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008); 3095 } 3096 wpi_mem_unlock(sc); 3097 3098 /* clear "radio off" and "disable command" bits (reversed logic) */ 3099 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3100 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD); 3101 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3102 3103 /* clear any pending interrupts */ 3104 WPI_WRITE(sc, WPI_INTR, 0xffffffff); 3105 3106 /* enable interrupts */ 3107 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK); 3108 3109 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3110 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF); 3111 3112 if ((wpi_load_firmware(sc)) != 0) { 3113 device_printf(sc->sc_dev, 3114 "A problem occurred loading the firmware to the driver\n"); 3115 return; 3116 } 3117 3118 /* At this point the firmware is up and running. If the hardware 3119 * RF switch is turned off thermal calibration will fail, though 3120 * the card is still happy to continue to accept commands, catch 3121 * this case and schedule a task to watch for it to be turned on. 3122 */ 3123 wpi_mem_lock(sc); 3124 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3125 wpi_mem_unlock(sc); 3126 3127 if (!(tmp & 0x1)) { 3128 sc->flags |= WPI_FLAG_HW_RADIO_OFF; 3129 device_printf(sc->sc_dev,"Radio Transmitter is switched off\n"); 3130 goto out; 3131 } 3132 3133 /* wait for thermal sensors to calibrate */ 3134 for (ntries = 0; ntries < 1000; ntries++) { 3135 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0) 3136 break; 3137 DELAY(10); 3138 } 3139 3140 if (ntries == 1000) { 3141 device_printf(sc->sc_dev, 3142 "timeout waiting for thermal sensors calibration\n"); 3143 return; 3144 } 3145 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp)); 3146 3147 if (wpi_config(sc) != 0) { 3148 device_printf(sc->sc_dev, "device config failed\n"); 3149 return; 3150 } 3151 3152 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 3153 ifp->if_drv_flags |= IFF_DRV_RUNNING; 3154 out: 3155 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3156 } 3157 3158 static void 3159 wpi_init(void *arg) 3160 { 3161 struct wpi_softc *sc = arg; 3162 struct ifnet *ifp = sc->sc_ifp; 3163 struct ieee80211com *ic = ifp->if_l2com; 3164 3165 WPI_LOCK(sc); 3166 wpi_init_locked(sc, 0); 3167 WPI_UNLOCK(sc); 3168 3169 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 3170 ieee80211_start_all(ic); /* start all vaps */ 3171 } 3172 3173 static void 3174 wpi_stop_locked(struct wpi_softc *sc) 3175 { 3176 struct ifnet *ifp = sc->sc_ifp; 3177 uint32_t tmp; 3178 int ac; 3179 3180 sc->sc_tx_timer = 0; 3181 sc->sc_scan_timer = 0; 3182 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 3183 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF; 3184 callout_stop(&sc->watchdog_to); 3185 callout_stop(&sc->calib_to); 3186 3187 /* disable interrupts */ 3188 WPI_WRITE(sc, WPI_MASK, 0); 3189 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK); 3190 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff); 3191 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000); 3192 3193 wpi_mem_lock(sc); 3194 wpi_mem_write(sc, WPI_MEM_MODE, 0); 3195 wpi_mem_unlock(sc); 3196 3197 /* reset all Tx rings */ 3198 for (ac = 0; ac < 4; ac++) 3199 wpi_reset_tx_ring(sc, &sc->txq[ac]); 3200 wpi_reset_tx_ring(sc, &sc->cmdq); 3201 3202 /* reset Rx ring */ 3203 wpi_reset_rx_ring(sc, &sc->rxq); 3204 3205 wpi_mem_lock(sc); 3206 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200); 3207 wpi_mem_unlock(sc); 3208 3209 DELAY(5); 3210 3211 wpi_stop_master(sc); 3212 3213 tmp = WPI_READ(sc, WPI_RESET); 3214 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET); 3215 sc->flags &= ~WPI_FLAG_BUSY; 3216 } 3217 3218 static void 3219 wpi_stop(struct wpi_softc *sc) 3220 { 3221 WPI_LOCK(sc); 3222 wpi_stop_locked(sc); 3223 WPI_UNLOCK(sc); 3224 } 3225 3226 static void 3227 wpi_calib_timeout(void *arg) 3228 { 3229 struct wpi_softc *sc = arg; 3230 struct ifnet *ifp = sc->sc_ifp; 3231 struct ieee80211com *ic = ifp->if_l2com; 3232 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3233 int temp; 3234 3235 if (vap->iv_state != IEEE80211_S_RUN) 3236 return; 3237 3238 /* update sensor data */ 3239 temp = (int)WPI_READ(sc, WPI_TEMPERATURE); 3240 DPRINTFN(WPI_DEBUG_TEMP,("Temp in calibration is: %d\n", temp)); 3241 3242 wpi_power_calibration(sc, temp); 3243 3244 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc); 3245 } 3246 3247 /* 3248 * This function is called periodically (every 60 seconds) to adjust output 3249 * power to temperature changes. 3250 */ 3251 static void 3252 wpi_power_calibration(struct wpi_softc *sc, int temp) 3253 { 3254 struct ifnet *ifp = sc->sc_ifp; 3255 struct ieee80211com *ic = ifp->if_l2com; 3256 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3257 3258 /* sanity-check read value */ 3259 if (temp < -260 || temp > 25) { 3260 /* this can't be correct, ignore */ 3261 DPRINTFN(WPI_DEBUG_TEMP, 3262 ("out-of-range temperature reported: %d\n", temp)); 3263 return; 3264 } 3265 3266 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d->%d\n", sc->temp, temp)); 3267 3268 /* adjust Tx power if need be */ 3269 if (abs(temp - sc->temp) <= 6) 3270 return; 3271 3272 sc->temp = temp; 3273 3274 if (wpi_set_txpower(sc, vap->iv_bss->ni_chan, 1) != 0) { 3275 /* just warn, too bad for the automatic calibration... */ 3276 device_printf(sc->sc_dev,"could not adjust Tx power\n"); 3277 } 3278 } 3279 3280 /** 3281 * Read the eeprom to find out what channels are valid for the given 3282 * band and update net80211 with what we find. 3283 */ 3284 static void 3285 wpi_read_eeprom_channels(struct wpi_softc *sc, int n) 3286 { 3287 struct ifnet *ifp = sc->sc_ifp; 3288 struct ieee80211com *ic = ifp->if_l2com; 3289 const struct wpi_chan_band *band = &wpi_bands[n]; 3290 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND]; 3291 struct ieee80211_channel *c; 3292 int chan, i, passive; 3293 3294 wpi_read_prom_data(sc, band->addr, channels, 3295 band->nchan * sizeof (struct wpi_eeprom_chan)); 3296 3297 for (i = 0; i < band->nchan; i++) { 3298 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) { 3299 DPRINTFN(WPI_DEBUG_HW, 3300 ("Channel Not Valid: %d, band %d\n", 3301 band->chan[i],n)); 3302 continue; 3303 } 3304 3305 passive = 0; 3306 chan = band->chan[i]; 3307 c = &ic->ic_channels[ic->ic_nchans++]; 3308 3309 /* is active scan allowed on this channel? */ 3310 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) { 3311 passive = IEEE80211_CHAN_PASSIVE; 3312 } 3313 3314 if (n == 0) { /* 2GHz band */ 3315 c->ic_ieee = chan; 3316 c->ic_freq = ieee80211_ieee2mhz(chan, 3317 IEEE80211_CHAN_2GHZ); 3318 c->ic_flags = IEEE80211_CHAN_B | passive; 3319 3320 c = &ic->ic_channels[ic->ic_nchans++]; 3321 c->ic_ieee = chan; 3322 c->ic_freq = ieee80211_ieee2mhz(chan, 3323 IEEE80211_CHAN_2GHZ); 3324 c->ic_flags = IEEE80211_CHAN_G | passive; 3325 3326 } else { /* 5GHz band */ 3327 /* 3328 * Some 3945ABG adapters support channels 7, 8, 11 3329 * and 12 in the 2GHz *and* 5GHz bands. 3330 * Because of limitations in our net80211(9) stack, 3331 * we can't support these channels in 5GHz band. 3332 * XXX not true; just need to map to proper frequency 3333 */ 3334 if (chan <= 14) 3335 continue; 3336 3337 c->ic_ieee = chan; 3338 c->ic_freq = ieee80211_ieee2mhz(chan, 3339 IEEE80211_CHAN_5GHZ); 3340 c->ic_flags = IEEE80211_CHAN_A | passive; 3341 } 3342 3343 /* save maximum allowed power for this channel */ 3344 sc->maxpwr[chan] = channels[i].maxpwr; 3345 3346 #if 0 3347 // XXX We can probably use this an get rid of maxpwr - ben 20070617 3348 ic->ic_channels[chan].ic_maxpower = channels[i].maxpwr; 3349 //ic->ic_channels[chan].ic_minpower... 3350 //ic->ic_channels[chan].ic_maxregtxpower... 3351 #endif 3352 3353 DPRINTF(("adding chan %d (%dMHz) flags=0x%x maxpwr=%d" 3354 " passive=%d, offset %d\n", chan, c->ic_freq, 3355 channels[i].flags, sc->maxpwr[chan], 3356 (c->ic_flags & IEEE80211_CHAN_PASSIVE) != 0, 3357 ic->ic_nchans)); 3358 } 3359 } 3360 3361 static void 3362 wpi_read_eeprom_group(struct wpi_softc *sc, int n) 3363 { 3364 struct wpi_power_group *group = &sc->groups[n]; 3365 struct wpi_eeprom_group rgroup; 3366 int i; 3367 3368 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup, 3369 sizeof rgroup); 3370 3371 /* save power group information */ 3372 group->chan = rgroup.chan; 3373 group->maxpwr = rgroup.maxpwr; 3374 /* temperature at which the samples were taken */ 3375 group->temp = (int16_t)le16toh(rgroup.temp); 3376 3377 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n, 3378 group->chan, group->maxpwr, group->temp)); 3379 3380 for (i = 0; i < WPI_SAMPLES_COUNT; i++) { 3381 group->samples[i].index = rgroup.samples[i].index; 3382 group->samples[i].power = rgroup.samples[i].power; 3383 3384 DPRINTF(("\tsample %d: index=%d power=%d\n", i, 3385 group->samples[i].index, group->samples[i].power)); 3386 } 3387 } 3388 3389 /* 3390 * Update Tx power to match what is defined for channel `c'. 3391 */ 3392 static int 3393 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async) 3394 { 3395 struct ifnet *ifp = sc->sc_ifp; 3396 struct ieee80211com *ic = ifp->if_l2com; 3397 struct wpi_power_group *group; 3398 struct wpi_cmd_txpower txpower; 3399 u_int chan; 3400 int i; 3401 3402 /* get channel number */ 3403 chan = ieee80211_chan2ieee(ic, c); 3404 3405 /* find the power group to which this channel belongs */ 3406 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3407 for (group = &sc->groups[1]; group < &sc->groups[4]; group++) 3408 if (chan <= group->chan) 3409 break; 3410 } else 3411 group = &sc->groups[0]; 3412 3413 memset(&txpower, 0, sizeof txpower); 3414 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1; 3415 txpower.channel = htole16(chan); 3416 3417 /* set Tx power for all OFDM and CCK rates */ 3418 for (i = 0; i <= 11 ; i++) { 3419 /* retrieve Tx power for this channel/rate combination */ 3420 int idx = wpi_get_power_index(sc, group, c, 3421 wpi_ridx_to_rate[i]); 3422 3423 txpower.rates[i].rate = wpi_ridx_to_plcp[i]; 3424 3425 if (IEEE80211_IS_CHAN_5GHZ(c)) { 3426 txpower.rates[i].gain_radio = wpi_rf_gain_5ghz[idx]; 3427 txpower.rates[i].gain_dsp = wpi_dsp_gain_5ghz[idx]; 3428 } else { 3429 txpower.rates[i].gain_radio = wpi_rf_gain_2ghz[idx]; 3430 txpower.rates[i].gain_dsp = wpi_dsp_gain_2ghz[idx]; 3431 } 3432 DPRINTFN(WPI_DEBUG_TEMP,("chan %d/rate %d: power index %d\n", 3433 chan, wpi_ridx_to_rate[i], idx)); 3434 } 3435 3436 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async); 3437 } 3438 3439 /* 3440 * Determine Tx power index for a given channel/rate combination. 3441 * This takes into account the regulatory information from EEPROM and the 3442 * current temperature. 3443 */ 3444 static int 3445 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group, 3446 struct ieee80211_channel *c, int rate) 3447 { 3448 /* fixed-point arithmetic division using a n-bit fractional part */ 3449 #define fdivround(a, b, n) \ 3450 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n)) 3451 3452 /* linear interpolation */ 3453 #define interpolate(x, x1, y1, x2, y2, n) \ 3454 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n)) 3455 3456 struct ifnet *ifp = sc->sc_ifp; 3457 struct ieee80211com *ic = ifp->if_l2com; 3458 struct wpi_power_sample *sample; 3459 int pwr, idx; 3460 u_int chan; 3461 3462 /* get channel number */ 3463 chan = ieee80211_chan2ieee(ic, c); 3464 3465 /* default power is group's maximum power - 3dB */ 3466 pwr = group->maxpwr / 2; 3467 3468 /* decrease power for highest OFDM rates to reduce distortion */ 3469 switch (rate) { 3470 case 72: /* 36Mb/s */ 3471 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5; 3472 break; 3473 case 96: /* 48Mb/s */ 3474 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10; 3475 break; 3476 case 108: /* 54Mb/s */ 3477 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12; 3478 break; 3479 } 3480 3481 /* never exceed channel's maximum allowed Tx power */ 3482 pwr = min(pwr, sc->maxpwr[chan]); 3483 3484 /* retrieve power index into gain tables from samples */ 3485 for (sample = group->samples; sample < &group->samples[3]; sample++) 3486 if (pwr > sample[1].power) 3487 break; 3488 /* fixed-point linear interpolation using a 19-bit fractional part */ 3489 idx = interpolate(pwr, sample[0].power, sample[0].index, 3490 sample[1].power, sample[1].index, 19); 3491 3492 /* 3493 * Adjust power index based on current temperature 3494 * - if colder than factory-calibrated: decreate output power 3495 * - if warmer than factory-calibrated: increase output power 3496 */ 3497 idx -= (sc->temp - group->temp) * 11 / 100; 3498 3499 /* decrease power for CCK rates (-5dB) */ 3500 if (!WPI_RATE_IS_OFDM(rate)) 3501 idx += 10; 3502 3503 /* keep power index in a valid range */ 3504 if (idx < 0) 3505 return 0; 3506 if (idx > WPI_MAX_PWR_INDEX) 3507 return WPI_MAX_PWR_INDEX; 3508 return idx; 3509 3510 #undef interpolate 3511 #undef fdivround 3512 } 3513 3514 /** 3515 * Called by net80211 framework to indicate that a scan 3516 * is starting. This function doesn't actually do the scan, 3517 * wpi_scan_curchan starts things off. This function is more 3518 * of an early warning from the framework we should get ready 3519 * for the scan. 3520 */ 3521 static void 3522 wpi_scan_start(struct ieee80211com *ic) 3523 { 3524 struct ifnet *ifp = ic->ic_ifp; 3525 struct wpi_softc *sc = ifp->if_softc; 3526 3527 WPI_LOCK(sc); 3528 wpi_set_led(sc, WPI_LED_LINK, 20, 2); 3529 WPI_UNLOCK(sc); 3530 } 3531 3532 /** 3533 * Called by the net80211 framework, indicates that the 3534 * scan has ended. If there is a scan in progress on the card 3535 * then it should be aborted. 3536 */ 3537 static void 3538 wpi_scan_end(struct ieee80211com *ic) 3539 { 3540 /* XXX ignore */ 3541 } 3542 3543 /** 3544 * Called by the net80211 framework to indicate to the driver 3545 * that the channel should be changed 3546 */ 3547 static void 3548 wpi_set_channel(struct ieee80211com *ic) 3549 { 3550 struct ifnet *ifp = ic->ic_ifp; 3551 struct wpi_softc *sc = ifp->if_softc; 3552 int error; 3553 3554 /* 3555 * Only need to set the channel in Monitor mode. AP scanning and auth 3556 * are already taken care of by their respective firmware commands. 3557 */ 3558 if (ic->ic_opmode == IEEE80211_M_MONITOR) { 3559 WPI_LOCK(sc); 3560 error = wpi_config(sc); 3561 WPI_UNLOCK(sc); 3562 if (error != 0) 3563 device_printf(sc->sc_dev, 3564 "error %d settting channel\n", error); 3565 } 3566 } 3567 3568 /** 3569 * Called by net80211 to indicate that we need to scan the current 3570 * channel. The channel is previously be set via the wpi_set_channel 3571 * callback. 3572 */ 3573 static void 3574 wpi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell) 3575 { 3576 struct ieee80211vap *vap = ss->ss_vap; 3577 struct ifnet *ifp = vap->iv_ic->ic_ifp; 3578 struct wpi_softc *sc = ifp->if_softc; 3579 3580 WPI_LOCK(sc); 3581 if (wpi_scan(sc)) 3582 ieee80211_cancel_scan(vap); 3583 WPI_UNLOCK(sc); 3584 } 3585 3586 /** 3587 * Called by the net80211 framework to indicate 3588 * the minimum dwell time has been met, terminate the scan. 3589 * We don't actually terminate the scan as the firmware will notify 3590 * us when it's finished and we have no way to interrupt it. 3591 */ 3592 static void 3593 wpi_scan_mindwell(struct ieee80211_scan_state *ss) 3594 { 3595 /* NB: don't try to abort scan; wait for firmware to finish */ 3596 } 3597 3598 static void 3599 wpi_hwreset(void *arg, int pending) 3600 { 3601 struct wpi_softc *sc = arg; 3602 3603 WPI_LOCK(sc); 3604 wpi_init_locked(sc, 0); 3605 WPI_UNLOCK(sc); 3606 } 3607 3608 static void 3609 wpi_rfreset(void *arg, int pending) 3610 { 3611 struct wpi_softc *sc = arg; 3612 3613 WPI_LOCK(sc); 3614 wpi_rfkill_resume(sc); 3615 WPI_UNLOCK(sc); 3616 } 3617 3618 /* 3619 * Allocate DMA-safe memory for firmware transfer. 3620 */ 3621 static int 3622 wpi_alloc_fwmem(struct wpi_softc *sc) 3623 { 3624 /* allocate enough contiguous space to store text and data */ 3625 return wpi_dma_contig_alloc(sc, &sc->fw_dma, NULL, 3626 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 1, 3627 BUS_DMA_NOWAIT); 3628 } 3629 3630 static void 3631 wpi_free_fwmem(struct wpi_softc *sc) 3632 { 3633 wpi_dma_contig_free(&sc->fw_dma); 3634 } 3635 3636 /** 3637 * Called every second, wpi_watchdog used by the watch dog timer 3638 * to check that the card is still alive 3639 */ 3640 static void 3641 wpi_watchdog(void *arg) 3642 { 3643 struct wpi_softc *sc = arg; 3644 struct ifnet *ifp = sc->sc_ifp; 3645 struct ieee80211com *ic = ifp->if_l2com; 3646 uint32_t tmp; 3647 3648 DPRINTFN(WPI_DEBUG_WATCHDOG,("Watchdog: tick\n")); 3649 3650 if (sc->flags & WPI_FLAG_HW_RADIO_OFF) { 3651 /* No need to lock firmware memory */ 3652 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF); 3653 3654 if ((tmp & 0x1) == 0) { 3655 /* Radio kill switch is still off */ 3656 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3657 return; 3658 } 3659 3660 device_printf(sc->sc_dev, "Hardware Switch Enabled\n"); 3661 ieee80211_runtask(ic, &sc->sc_radiotask); 3662 return; 3663 } 3664 3665 if (sc->sc_tx_timer > 0) { 3666 if (--sc->sc_tx_timer == 0) { 3667 device_printf(sc->sc_dev,"device timeout\n"); 3668 ifp->if_oerrors++; 3669 ieee80211_runtask(ic, &sc->sc_restarttask); 3670 } 3671 } 3672 if (sc->sc_scan_timer > 0) { 3673 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps); 3674 if (--sc->sc_scan_timer == 0 && vap != NULL) { 3675 device_printf(sc->sc_dev,"scan timeout\n"); 3676 ieee80211_cancel_scan(vap); 3677 ieee80211_runtask(ic, &sc->sc_restarttask); 3678 } 3679 } 3680 3681 if (ifp->if_drv_flags & IFF_DRV_RUNNING) 3682 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc); 3683 } 3684 3685 #ifdef WPI_DEBUG 3686 static const char *wpi_cmd_str(int cmd) 3687 { 3688 switch (cmd) { 3689 case WPI_DISABLE_CMD: return "WPI_DISABLE_CMD"; 3690 case WPI_CMD_CONFIGURE: return "WPI_CMD_CONFIGURE"; 3691 case WPI_CMD_ASSOCIATE: return "WPI_CMD_ASSOCIATE"; 3692 case WPI_CMD_SET_WME: return "WPI_CMD_SET_WME"; 3693 case WPI_CMD_TSF: return "WPI_CMD_TSF"; 3694 case WPI_CMD_ADD_NODE: return "WPI_CMD_ADD_NODE"; 3695 case WPI_CMD_TX_DATA: return "WPI_CMD_TX_DATA"; 3696 case WPI_CMD_MRR_SETUP: return "WPI_CMD_MRR_SETUP"; 3697 case WPI_CMD_SET_LED: return "WPI_CMD_SET_LED"; 3698 case WPI_CMD_SET_POWER_MODE: return "WPI_CMD_SET_POWER_MODE"; 3699 case WPI_CMD_SCAN: return "WPI_CMD_SCAN"; 3700 case WPI_CMD_SET_BEACON:return "WPI_CMD_SET_BEACON"; 3701 case WPI_CMD_TXPOWER: return "WPI_CMD_TXPOWER"; 3702 case WPI_CMD_BLUETOOTH: return "WPI_CMD_BLUETOOTH"; 3703 3704 default: 3705 KASSERT(1, ("Unknown Command: %d\n", cmd)); 3706 return "UNKNOWN CMD"; /* Make the compiler happy */ 3707 } 3708 } 3709 #endif 3710 3711 MODULE_DEPEND(wpi, pci, 1, 1, 1); 3712 MODULE_DEPEND(wpi, wlan, 1, 1, 1); 3713 MODULE_DEPEND(wpi, firmware, 1, 1, 1);
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