FreeBSD/Linux Kernel Cross Reference
sys/dev/wpi/if_wpi.c
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: releng/9.2/sys/dev/wpi/if_wpi.c 248078 2013-03-09 00:39:54Z marius $");
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
254 static device_method_t wpi_methods[] = {
255 /* Device interface */
256 DEVMETHOD(device_probe, wpi_probe),
257 DEVMETHOD(device_attach, wpi_attach),
258 DEVMETHOD(device_detach, wpi_detach),
259 DEVMETHOD(device_shutdown, wpi_shutdown),
260 DEVMETHOD(device_suspend, wpi_suspend),
261 DEVMETHOD(device_resume, wpi_resume),
262
263 { 0, 0 }
264 };
265
266 static driver_t wpi_driver = {
267 "wpi",
268 wpi_methods,
269 sizeof (struct wpi_softc)
270 };
271
272 static devclass_t wpi_devclass;
273
274 DRIVER_MODULE(wpi, pci, wpi_driver, wpi_devclass, 0, 0);
275
276 MODULE_VERSION(wpi, 1);
277
278 static const uint8_t wpi_ridx_to_plcp[] = {
279 /* OFDM: IEEE Std 802.11a-1999, pp. 14 Table 80 */
280 /* R1-R4 (ral/ural is R4-R1) */
281 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3,
282 /* CCK: device-dependent */
283 10, 20, 55, 110
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
291 static int
292 wpi_probe(device_t dev)
293 {
294 const struct wpi_ident *ident;
295
296 for (ident = wpi_ident_table; ident->name != NULL; ident++) {
297 if (pci_get_vendor(dev) == ident->vendor &&
298 pci_get_device(dev) == ident->device) {
299 device_set_desc(dev, ident->name);
300 return 0;
301 }
302 }
303 return ENXIO;
304 }
305
306 /**
307 * Load the firmare image from disk to the allocated dma buffer.
308 * we also maintain the reference to the firmware pointer as there
309 * is times where we may need to reload the firmware but we are not
310 * in a context that can access the filesystem (ie taskq cause by restart)
311 *
312 * @return 0 on success, an errno on failure
313 */
314 static int
315 wpi_load_firmware(struct wpi_softc *sc)
316 {
317 const struct firmware *fp;
318 struct wpi_dma_info *dma = &sc->fw_dma;
319 const struct wpi_firmware_hdr *hdr;
320 const uint8_t *itext, *idata, *rtext, *rdata, *btext;
321 uint32_t itextsz, idatasz, rtextsz, rdatasz, btextsz;
322 int error;
323
324 DPRINTFN(WPI_DEBUG_FIRMWARE,
325 ("Attempting Loading Firmware from wpi_fw module\n"));
326
327 WPI_UNLOCK(sc);
328
329 if (sc->fw_fp == NULL && (sc->fw_fp = firmware_get("wpifw")) == NULL) {
330 device_printf(sc->sc_dev,
331 "could not load firmware image 'wpifw'\n");
332 error = ENOENT;
333 WPI_LOCK(sc);
334 goto fail;
335 }
336
337 fp = sc->fw_fp;
338
339 WPI_LOCK(sc);
340
341 /* Validate the firmware is minimum a particular version */
342 if (fp->version < WPI_FW_MINVERSION) {
343 device_printf(sc->sc_dev,
344 "firmware version is too old. Need %d, got %d\n",
345 WPI_FW_MINVERSION,
346 fp->version);
347 error = ENXIO;
348 goto fail;
349 }
350
351 if (fp->datasize < sizeof (struct wpi_firmware_hdr)) {
352 device_printf(sc->sc_dev,
353 "firmware file too short: %zu bytes\n", fp->datasize);
354 error = ENXIO;
355 goto fail;
356 }
357
358 hdr = (const struct wpi_firmware_hdr *)fp->data;
359
360 /* | RUNTIME FIRMWARE | INIT FIRMWARE | BOOT FW |
361 |HDR|<--TEXT-->|<--DATA-->|<--TEXT-->|<--DATA-->|<--TEXT-->| */
362
363 rtextsz = le32toh(hdr->rtextsz);
364 rdatasz = le32toh(hdr->rdatasz);
365 itextsz = le32toh(hdr->itextsz);
366 idatasz = le32toh(hdr->idatasz);
367 btextsz = le32toh(hdr->btextsz);
368
369 /* check that all firmware segments are present */
370 if (fp->datasize < sizeof (struct wpi_firmware_hdr) +
371 rtextsz + rdatasz + itextsz + idatasz + btextsz) {
372 device_printf(sc->sc_dev,
373 "firmware file too short: %zu bytes\n", fp->datasize);
374 error = ENXIO; /* XXX appropriate error code? */
375 goto fail;
376 }
377
378 /* get pointers to firmware segments */
379 rtext = (const uint8_t *)(hdr + 1);
380 rdata = rtext + rtextsz;
381 itext = rdata + rdatasz;
382 idata = itext + itextsz;
383 btext = idata + idatasz;
384
385 DPRINTFN(WPI_DEBUG_FIRMWARE,
386 ("Firmware Version: Major %d, Minor %d, Driver %d, \n"
387 "runtime (text: %u, data: %u) init (text: %u, data %u) boot (text %u)\n",
388 (le32toh(hdr->version) & 0xff000000) >> 24,
389 (le32toh(hdr->version) & 0x00ff0000) >> 16,
390 (le32toh(hdr->version) & 0x0000ffff),
391 rtextsz, rdatasz,
392 itextsz, idatasz, btextsz));
393
394 DPRINTFN(WPI_DEBUG_FIRMWARE,("rtext 0x%x\n", *(const uint32_t *)rtext));
395 DPRINTFN(WPI_DEBUG_FIRMWARE,("rdata 0x%x\n", *(const uint32_t *)rdata));
396 DPRINTFN(WPI_DEBUG_FIRMWARE,("itext 0x%x\n", *(const uint32_t *)itext));
397 DPRINTFN(WPI_DEBUG_FIRMWARE,("idata 0x%x\n", *(const uint32_t *)idata));
398 DPRINTFN(WPI_DEBUG_FIRMWARE,("btext 0x%x\n", *(const uint32_t *)btext));
399
400 /* sanity checks */
401 if (rtextsz > WPI_FW_MAIN_TEXT_MAXSZ ||
402 rdatasz > WPI_FW_MAIN_DATA_MAXSZ ||
403 itextsz > WPI_FW_INIT_TEXT_MAXSZ ||
404 idatasz > WPI_FW_INIT_DATA_MAXSZ ||
405 btextsz > WPI_FW_BOOT_TEXT_MAXSZ ||
406 (btextsz & 3) != 0) {
407 device_printf(sc->sc_dev, "firmware invalid\n");
408 error = EINVAL;
409 goto fail;
410 }
411
412 /* copy initialization images into pre-allocated DMA-safe memory */
413 memcpy(dma->vaddr, idata, idatasz);
414 memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, itext, itextsz);
415
416 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE);
417
418 /* tell adapter where to find initialization images */
419 wpi_mem_lock(sc);
420 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr);
421 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, idatasz);
422 wpi_mem_write(sc, WPI_MEM_TEXT_BASE,
423 dma->paddr + WPI_FW_INIT_DATA_MAXSZ);
424 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, itextsz);
425 wpi_mem_unlock(sc);
426
427 /* load firmware boot code */
428 if ((error = wpi_load_microcode(sc, btext, btextsz)) != 0) {
429 device_printf(sc->sc_dev, "Failed to load microcode\n");
430 goto fail;
431 }
432
433 /* now press "execute" */
434 WPI_WRITE(sc, WPI_RESET, 0);
435
436 /* wait at most one second for the first alive notification */
437 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) {
438 device_printf(sc->sc_dev,
439 "timeout waiting for adapter to initialize\n");
440 goto fail;
441 }
442
443 /* copy runtime images into pre-allocated DMA-sage memory */
444 memcpy(dma->vaddr, rdata, rdatasz);
445 memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, rtext, rtextsz);
446 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE);
447
448 /* tell adapter where to find runtime images */
449 wpi_mem_lock(sc);
450 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr);
451 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, rdatasz);
452 wpi_mem_write(sc, WPI_MEM_TEXT_BASE,
453 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ);
454 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | rtextsz);
455 wpi_mem_unlock(sc);
456
457 /* wait at most one second for the first alive notification */
458 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) {
459 device_printf(sc->sc_dev,
460 "timeout waiting for adapter to initialize2\n");
461 goto fail;
462 }
463
464 DPRINTFN(WPI_DEBUG_FIRMWARE,
465 ("Firmware loaded to driver successfully\n"));
466 return error;
467 fail:
468 wpi_unload_firmware(sc);
469 return error;
470 }
471
472 /**
473 * Free the referenced firmware image
474 */
475 static void
476 wpi_unload_firmware(struct wpi_softc *sc)
477 {
478
479 if (sc->fw_fp) {
480 WPI_UNLOCK(sc);
481 firmware_put(sc->fw_fp, FIRMWARE_UNLOAD);
482 WPI_LOCK(sc);
483 sc->fw_fp = NULL;
484 }
485 }
486
487 static int
488 wpi_attach(device_t dev)
489 {
490 struct wpi_softc *sc = device_get_softc(dev);
491 struct ifnet *ifp;
492 struct ieee80211com *ic;
493 int ac, error, supportsa = 1;
494 uint32_t tmp;
495 const struct wpi_ident *ident;
496 uint8_t macaddr[IEEE80211_ADDR_LEN];
497
498 sc->sc_dev = dev;
499
500 if (bootverbose || WPI_DEBUG_SET)
501 device_printf(sc->sc_dev,"Driver Revision %s\n", VERSION);
502
503 /*
504 * Some card's only support 802.11b/g not a, check to see if
505 * this is one such card. A 0x0 in the subdevice table indicates
506 * the entire subdevice range is to be ignored.
507 */
508 for (ident = wpi_ident_table; ident->name != NULL; ident++) {
509 if (ident->subdevice &&
510 pci_get_subdevice(dev) == ident->subdevice) {
511 supportsa = 0;
512 break;
513 }
514 }
515
516 /* Create the tasks that can be queued */
517 TASK_INIT(&sc->sc_restarttask, 0, wpi_hwreset, sc);
518 TASK_INIT(&sc->sc_radiotask, 0, wpi_rfreset, sc);
519
520 WPI_LOCK_INIT(sc);
521
522 callout_init_mtx(&sc->calib_to, &sc->sc_mtx, 0);
523 callout_init_mtx(&sc->watchdog_to, &sc->sc_mtx, 0);
524
525 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
526 device_printf(dev, "chip is in D%d power mode "
527 "-- setting to D0\n", pci_get_powerstate(dev));
528 pci_set_powerstate(dev, PCI_POWERSTATE_D0);
529 }
530
531 /* disable the retry timeout register */
532 pci_write_config(dev, 0x41, 0, 1);
533
534 /* enable bus-mastering */
535 pci_enable_busmaster(dev);
536
537 sc->mem_rid = PCIR_BAR(0);
538 sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
539 RF_ACTIVE);
540 if (sc->mem == NULL) {
541 device_printf(dev, "could not allocate memory resource\n");
542 error = ENOMEM;
543 goto fail;
544 }
545
546 sc->sc_st = rman_get_bustag(sc->mem);
547 sc->sc_sh = rman_get_bushandle(sc->mem);
548
549 sc->irq_rid = 0;
550 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
551 RF_ACTIVE | RF_SHAREABLE);
552 if (sc->irq == NULL) {
553 device_printf(dev, "could not allocate interrupt resource\n");
554 error = ENOMEM;
555 goto fail;
556 }
557
558 /*
559 * Allocate DMA memory for firmware transfers.
560 */
561 if ((error = wpi_alloc_fwmem(sc)) != 0) {
562 printf(": could not allocate firmware memory\n");
563 error = ENOMEM;
564 goto fail;
565 }
566
567 /*
568 * Put adapter into a known state.
569 */
570 if ((error = wpi_reset(sc)) != 0) {
571 device_printf(dev, "could not reset adapter\n");
572 goto fail;
573 }
574
575 wpi_mem_lock(sc);
576 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV);
577 if (bootverbose || WPI_DEBUG_SET)
578 device_printf(sc->sc_dev, "Hardware Revision (0x%X)\n", tmp);
579
580 wpi_mem_unlock(sc);
581
582 /* Allocate shared page */
583 if ((error = wpi_alloc_shared(sc)) != 0) {
584 device_printf(dev, "could not allocate shared page\n");
585 goto fail;
586 }
587
588 /* tx data queues - 4 for QoS purposes */
589 for (ac = 0; ac < WME_NUM_AC; ac++) {
590 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac);
591 if (error != 0) {
592 device_printf(dev, "could not allocate Tx ring %d\n",ac);
593 goto fail;
594 }
595 }
596
597 /* command queue to talk to the card's firmware */
598 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4);
599 if (error != 0) {
600 device_printf(dev, "could not allocate command ring\n");
601 goto fail;
602 }
603
604 /* receive data queue */
605 error = wpi_alloc_rx_ring(sc, &sc->rxq);
606 if (error != 0) {
607 device_printf(dev, "could not allocate Rx ring\n");
608 goto fail;
609 }
610
611 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
612 if (ifp == NULL) {
613 device_printf(dev, "can not if_alloc()\n");
614 error = ENOMEM;
615 goto fail;
616 }
617 ic = ifp->if_l2com;
618
619 ic->ic_ifp = ifp;
620 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
621 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */
622
623 /* set device capabilities */
624 ic->ic_caps =
625 IEEE80211_C_STA /* station mode supported */
626 | IEEE80211_C_MONITOR /* monitor mode supported */
627 | IEEE80211_C_TXPMGT /* tx power management */
628 | IEEE80211_C_SHSLOT /* short slot time supported */
629 | IEEE80211_C_SHPREAMBLE /* short preamble supported */
630 | IEEE80211_C_WPA /* 802.11i */
631 /* XXX looks like WME is partly supported? */
632 #if 0
633 | IEEE80211_C_IBSS /* IBSS mode support */
634 | IEEE80211_C_BGSCAN /* capable of bg scanning */
635 | IEEE80211_C_WME /* 802.11e */
636 | IEEE80211_C_HOSTAP /* Host access point mode */
637 #endif
638 ;
639
640 /*
641 * Read in the eeprom and also setup the channels for
642 * net80211. We don't set the rates as net80211 does this for us
643 */
644 wpi_read_eeprom(sc, macaddr);
645
646 if (bootverbose || WPI_DEBUG_SET) {
647 device_printf(sc->sc_dev, "Regulatory Domain: %.4s\n", sc->domain);
648 device_printf(sc->sc_dev, "Hardware Type: %c\n",
649 sc->type > 1 ? 'B': '?');
650 device_printf(sc->sc_dev, "Hardware Revision: %c\n",
651 ((le16toh(sc->rev) & 0xf0) == 0xd0) ? 'D': '?');
652 device_printf(sc->sc_dev, "SKU %s support 802.11a\n",
653 supportsa ? "does" : "does not");
654
655 /* XXX hw_config uses the PCIDEV for the Hardware rev. Must check
656 what sc->rev really represents - benjsc 20070615 */
657 }
658
659 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
660 ifp->if_softc = sc;
661 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
662 ifp->if_init = wpi_init;
663 ifp->if_ioctl = wpi_ioctl;
664 ifp->if_start = wpi_start;
665 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
666 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
667 IFQ_SET_READY(&ifp->if_snd);
668
669 ieee80211_ifattach(ic, macaddr);
670 /* override default methods */
671 ic->ic_raw_xmit = wpi_raw_xmit;
672 ic->ic_wme.wme_update = wpi_wme_update;
673 ic->ic_scan_start = wpi_scan_start;
674 ic->ic_scan_end = wpi_scan_end;
675 ic->ic_set_channel = wpi_set_channel;
676 ic->ic_scan_curchan = wpi_scan_curchan;
677 ic->ic_scan_mindwell = wpi_scan_mindwell;
678
679 ic->ic_vap_create = wpi_vap_create;
680 ic->ic_vap_delete = wpi_vap_delete;
681
682 ieee80211_radiotap_attach(ic,
683 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
684 WPI_TX_RADIOTAP_PRESENT,
685 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
686 WPI_RX_RADIOTAP_PRESENT);
687
688 /*
689 * Hook our interrupt after all initialization is complete.
690 */
691 error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET |INTR_MPSAFE,
692 NULL, wpi_intr, sc, &sc->sc_ih);
693 if (error != 0) {
694 device_printf(dev, "could not set up interrupt\n");
695 goto fail;
696 }
697
698 if (bootverbose)
699 ieee80211_announce(ic);
700 #ifdef XXX_DEBUG
701 ieee80211_announce_channels(ic);
702 #endif
703 return 0;
704
705 fail: wpi_detach(dev);
706 return ENXIO;
707 }
708
709 static int
710 wpi_detach(device_t dev)
711 {
712 struct wpi_softc *sc = device_get_softc(dev);
713 struct ifnet *ifp = sc->sc_ifp;
714 struct ieee80211com *ic;
715 int ac;
716
717 if (ifp != NULL) {
718 ic = ifp->if_l2com;
719
720 ieee80211_draintask(ic, &sc->sc_restarttask);
721 ieee80211_draintask(ic, &sc->sc_radiotask);
722 wpi_stop(sc);
723 callout_drain(&sc->watchdog_to);
724 callout_drain(&sc->calib_to);
725 ieee80211_ifdetach(ic);
726 }
727
728 WPI_LOCK(sc);
729 if (sc->txq[0].data_dmat) {
730 for (ac = 0; ac < WME_NUM_AC; ac++)
731 wpi_free_tx_ring(sc, &sc->txq[ac]);
732
733 wpi_free_tx_ring(sc, &sc->cmdq);
734 wpi_free_rx_ring(sc, &sc->rxq);
735 wpi_free_shared(sc);
736 }
737
738 if (sc->fw_fp != NULL) {
739 wpi_unload_firmware(sc);
740 }
741
742 if (sc->fw_dma.tag)
743 wpi_free_fwmem(sc);
744 WPI_UNLOCK(sc);
745
746 if (sc->irq != NULL) {
747 bus_teardown_intr(dev, sc->irq, sc->sc_ih);
748 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
749 }
750
751 if (sc->mem != NULL)
752 bus_release_resource(dev, SYS_RES_MEMORY, sc->mem_rid, sc->mem);
753
754 if (ifp != NULL)
755 if_free(ifp);
756
757 WPI_LOCK_DESTROY(sc);
758
759 return 0;
760 }
761
762 static struct ieee80211vap *
763 wpi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
764 enum ieee80211_opmode opmode, int flags,
765 const uint8_t bssid[IEEE80211_ADDR_LEN],
766 const uint8_t mac[IEEE80211_ADDR_LEN])
767 {
768 struct wpi_vap *wvp;
769 struct ieee80211vap *vap;
770
771 if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */
772 return NULL;
773 wvp = (struct wpi_vap *) malloc(sizeof(struct wpi_vap),
774 M_80211_VAP, M_NOWAIT | M_ZERO);
775 if (wvp == NULL)
776 return NULL;
777 vap = &wvp->vap;
778 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
779 /* override with driver methods */
780 wvp->newstate = vap->iv_newstate;
781 vap->iv_newstate = wpi_newstate;
782
783 ieee80211_ratectl_init(vap);
784 /* complete setup */
785 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status);
786 ic->ic_opmode = opmode;
787 return vap;
788 }
789
790 static void
791 wpi_vap_delete(struct ieee80211vap *vap)
792 {
793 struct wpi_vap *wvp = WPI_VAP(vap);
794
795 ieee80211_ratectl_deinit(vap);
796 ieee80211_vap_detach(vap);
797 free(wvp, M_80211_VAP);
798 }
799
800 static void
801 wpi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
802 {
803 if (error != 0)
804 return;
805
806 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs));
807
808 *(bus_addr_t *)arg = segs[0].ds_addr;
809 }
810
811 /*
812 * Allocates a contiguous block of dma memory of the requested size and
813 * alignment. Due to limitations of the FreeBSD dma subsystem as of 20071217,
814 * allocations greater than 4096 may fail. Hence if the requested alignment is
815 * greater we allocate 'alignment' size extra memory and shift the vaddr and
816 * paddr after the dma load. This bypasses the problem at the cost of a little
817 * more memory.
818 */
819 static int
820 wpi_dma_contig_alloc(struct wpi_softc *sc, struct wpi_dma_info *dma,
821 void **kvap, bus_size_t size, bus_size_t alignment, int flags)
822 {
823 int error;
824 bus_size_t align;
825 bus_size_t reqsize;
826
827 DPRINTFN(WPI_DEBUG_DMA,
828 ("Size: %zd - alignment %zd\n", size, alignment));
829
830 dma->size = size;
831 dma->tag = NULL;
832
833 if (alignment > 4096) {
834 align = PAGE_SIZE;
835 reqsize = size + alignment;
836 } else {
837 align = alignment;
838 reqsize = size;
839 }
840 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), align,
841 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
842 NULL, NULL, reqsize,
843 1, reqsize, flags,
844 NULL, NULL, &dma->tag);
845 if (error != 0) {
846 device_printf(sc->sc_dev,
847 "could not create shared page DMA tag\n");
848 goto fail;
849 }
850 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr_start,
851 flags | BUS_DMA_ZERO, &dma->map);
852 if (error != 0) {
853 device_printf(sc->sc_dev,
854 "could not allocate shared page DMA memory\n");
855 goto fail;
856 }
857
858 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr_start,
859 reqsize, wpi_dma_map_addr, &dma->paddr_start, flags);
860
861 /* Save the original pointers so we can free all the memory */
862 dma->paddr = dma->paddr_start;
863 dma->vaddr = dma->vaddr_start;
864
865 /*
866 * Check the alignment and increment by 4096 until we get the
867 * requested alignment. Fail if can't obtain the alignment
868 * we requested.
869 */
870 if ((dma->paddr & (alignment -1 )) != 0) {
871 int i;
872
873 for (i = 0; i < alignment / 4096; i++) {
874 if ((dma->paddr & (alignment - 1 )) == 0)
875 break;
876 dma->paddr += 4096;
877 dma->vaddr += 4096;
878 }
879 if (i == alignment / 4096) {
880 device_printf(sc->sc_dev,
881 "alignment requirement was not satisfied\n");
882 goto fail;
883 }
884 }
885
886 if (error != 0) {
887 device_printf(sc->sc_dev,
888 "could not load shared page DMA map\n");
889 goto fail;
890 }
891
892 if (kvap != NULL)
893 *kvap = dma->vaddr;
894
895 return 0;
896
897 fail:
898 wpi_dma_contig_free(dma);
899 return error;
900 }
901
902 static void
903 wpi_dma_contig_free(struct wpi_dma_info *dma)
904 {
905 if (dma->tag) {
906 if (dma->map != NULL) {
907 if (dma->paddr_start != 0) {
908 bus_dmamap_sync(dma->tag, dma->map,
909 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
910 bus_dmamap_unload(dma->tag, dma->map);
911 }
912 bus_dmamem_free(dma->tag, &dma->vaddr_start, dma->map);
913 }
914 bus_dma_tag_destroy(dma->tag);
915 }
916 }
917
918 /*
919 * Allocate a shared page between host and NIC.
920 */
921 static int
922 wpi_alloc_shared(struct wpi_softc *sc)
923 {
924 int error;
925
926 error = wpi_dma_contig_alloc(sc, &sc->shared_dma,
927 (void **)&sc->shared, sizeof (struct wpi_shared),
928 PAGE_SIZE,
929 BUS_DMA_NOWAIT);
930
931 if (error != 0) {
932 device_printf(sc->sc_dev,
933 "could not allocate shared area DMA memory\n");
934 }
935
936 return error;
937 }
938
939 static void
940 wpi_free_shared(struct wpi_softc *sc)
941 {
942 wpi_dma_contig_free(&sc->shared_dma);
943 }
944
945 static int
946 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
947 {
948
949 int i, error;
950
951 ring->cur = 0;
952
953 error = wpi_dma_contig_alloc(sc, &ring->desc_dma,
954 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t),
955 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
956
957 if (error != 0) {
958 device_printf(sc->sc_dev,
959 "%s: could not allocate rx ring DMA memory, error %d\n",
960 __func__, error);
961 goto fail;
962 }
963
964 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
965 BUS_SPACE_MAXADDR_32BIT,
966 BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1,
967 MJUMPAGESIZE, BUS_DMA_NOWAIT, NULL, NULL, &ring->data_dmat);
968 if (error != 0) {
969 device_printf(sc->sc_dev,
970 "%s: bus_dma_tag_create_failed, error %d\n",
971 __func__, error);
972 goto fail;
973 }
974
975 /*
976 * Setup Rx buffers.
977 */
978 for (i = 0; i < WPI_RX_RING_COUNT; i++) {
979 struct wpi_rx_data *data = &ring->data[i];
980 struct mbuf *m;
981 bus_addr_t paddr;
982
983 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
984 if (error != 0) {
985 device_printf(sc->sc_dev,
986 "%s: bus_dmamap_create failed, error %d\n",
987 __func__, error);
988 goto fail;
989 }
990 m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
991 if (m == NULL) {
992 device_printf(sc->sc_dev,
993 "%s: could not allocate rx mbuf\n", __func__);
994 error = ENOMEM;
995 goto fail;
996 }
997 /* map page */
998 error = bus_dmamap_load(ring->data_dmat, data->map,
999 mtod(m, caddr_t), MJUMPAGESIZE,
1000 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT);
1001 if (error != 0 && error != EFBIG) {
1002 device_printf(sc->sc_dev,
1003 "%s: bus_dmamap_load failed, error %d\n",
1004 __func__, error);
1005 m_freem(m);
1006 error = ENOMEM; /* XXX unique code */
1007 goto fail;
1008 }
1009 bus_dmamap_sync(ring->data_dmat, data->map,
1010 BUS_DMASYNC_PREWRITE);
1011
1012 data->m = m;
1013 ring->desc[i] = htole32(paddr);
1014 }
1015 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
1016 BUS_DMASYNC_PREWRITE);
1017 return 0;
1018 fail:
1019 wpi_free_rx_ring(sc, ring);
1020 return error;
1021 }
1022
1023 static void
1024 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
1025 {
1026 int ntries;
1027
1028 wpi_mem_lock(sc);
1029
1030 WPI_WRITE(sc, WPI_RX_CONFIG, 0);
1031
1032 for (ntries = 0; ntries < 100; ntries++) {
1033 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE)
1034 break;
1035 DELAY(10);
1036 }
1037
1038 wpi_mem_unlock(sc);
1039
1040 #ifdef WPI_DEBUG
1041 if (ntries == 100 && wpi_debug > 0)
1042 device_printf(sc->sc_dev, "timeout resetting Rx ring\n");
1043 #endif
1044
1045 ring->cur = 0;
1046 }
1047
1048 static void
1049 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
1050 {
1051 int i;
1052
1053 wpi_dma_contig_free(&ring->desc_dma);
1054
1055 for (i = 0; i < WPI_RX_RING_COUNT; i++) {
1056 struct wpi_rx_data *data = &ring->data[i];
1057
1058 if (data->m != NULL) {
1059 bus_dmamap_sync(ring->data_dmat, data->map,
1060 BUS_DMASYNC_POSTREAD);
1061 bus_dmamap_unload(ring->data_dmat, data->map);
1062 m_freem(data->m);
1063 }
1064 if (data->map != NULL)
1065 bus_dmamap_destroy(ring->data_dmat, data->map);
1066 }
1067 }
1068
1069 static int
1070 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count,
1071 int qid)
1072 {
1073 struct wpi_tx_data *data;
1074 int i, error;
1075
1076 ring->qid = qid;
1077 ring->count = count;
1078 ring->queued = 0;
1079 ring->cur = 0;
1080 ring->data = NULL;
1081
1082 error = wpi_dma_contig_alloc(sc, &ring->desc_dma,
1083 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc),
1084 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
1085
1086 if (error != 0) {
1087 device_printf(sc->sc_dev, "could not allocate tx dma memory\n");
1088 goto fail;
1089 }
1090
1091 /* update shared page with ring's base address */
1092 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr);
1093
1094 error = wpi_dma_contig_alloc(sc, &ring->cmd_dma, (void **)&ring->cmd,
1095 count * sizeof (struct wpi_tx_cmd), WPI_RING_DMA_ALIGN,
1096 BUS_DMA_NOWAIT);
1097
1098 if (error != 0) {
1099 device_printf(sc->sc_dev,
1100 "could not allocate tx command DMA memory\n");
1101 goto fail;
1102 }
1103
1104 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF,
1105 M_NOWAIT | M_ZERO);
1106 if (ring->data == NULL) {
1107 device_printf(sc->sc_dev,
1108 "could not allocate tx data slots\n");
1109 goto fail;
1110 }
1111
1112 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
1113 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
1114 WPI_MAX_SCATTER - 1, MCLBYTES, BUS_DMA_NOWAIT, NULL, NULL,
1115 &ring->data_dmat);
1116 if (error != 0) {
1117 device_printf(sc->sc_dev, "could not create data DMA tag\n");
1118 goto fail;
1119 }
1120
1121 for (i = 0; i < count; i++) {
1122 data = &ring->data[i];
1123
1124 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
1125 if (error != 0) {
1126 device_printf(sc->sc_dev,
1127 "could not create tx buf DMA map\n");
1128 goto fail;
1129 }
1130 bus_dmamap_sync(ring->data_dmat, data->map,
1131 BUS_DMASYNC_PREWRITE);
1132 }
1133
1134 return 0;
1135
1136 fail:
1137 wpi_free_tx_ring(sc, ring);
1138 return error;
1139 }
1140
1141 static void
1142 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring)
1143 {
1144 struct wpi_tx_data *data;
1145 int i, ntries;
1146
1147 wpi_mem_lock(sc);
1148
1149 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0);
1150 for (ntries = 0; ntries < 100; ntries++) {
1151 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid))
1152 break;
1153 DELAY(10);
1154 }
1155 #ifdef WPI_DEBUG
1156 if (ntries == 100 && wpi_debug > 0)
1157 device_printf(sc->sc_dev, "timeout resetting Tx ring %d\n",
1158 ring->qid);
1159 #endif
1160 wpi_mem_unlock(sc);
1161
1162 for (i = 0; i < ring->count; i++) {
1163 data = &ring->data[i];
1164
1165 if (data->m != NULL) {
1166 bus_dmamap_unload(ring->data_dmat, data->map);
1167 m_freem(data->m);
1168 data->m = NULL;
1169 }
1170 }
1171
1172 ring->queued = 0;
1173 ring->cur = 0;
1174 }
1175
1176 static void
1177 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring)
1178 {
1179 struct wpi_tx_data *data;
1180 int i;
1181
1182 wpi_dma_contig_free(&ring->desc_dma);
1183 wpi_dma_contig_free(&ring->cmd_dma);
1184
1185 if (ring->data != NULL) {
1186 for (i = 0; i < ring->count; i++) {
1187 data = &ring->data[i];
1188
1189 if (data->m != NULL) {
1190 bus_dmamap_sync(ring->data_dmat, data->map,
1191 BUS_DMASYNC_POSTWRITE);
1192 bus_dmamap_unload(ring->data_dmat, data->map);
1193 m_freem(data->m);
1194 data->m = NULL;
1195 }
1196 }
1197 free(ring->data, M_DEVBUF);
1198 }
1199
1200 if (ring->data_dmat != NULL)
1201 bus_dma_tag_destroy(ring->data_dmat);
1202 }
1203
1204 static int
1205 wpi_shutdown(device_t dev)
1206 {
1207 struct wpi_softc *sc = device_get_softc(dev);
1208
1209 WPI_LOCK(sc);
1210 wpi_stop_locked(sc);
1211 wpi_unload_firmware(sc);
1212 WPI_UNLOCK(sc);
1213
1214 return 0;
1215 }
1216
1217 static int
1218 wpi_suspend(device_t dev)
1219 {
1220 struct wpi_softc *sc = device_get_softc(dev);
1221 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
1222
1223 ieee80211_suspend_all(ic);
1224 return 0;
1225 }
1226
1227 static int
1228 wpi_resume(device_t dev)
1229 {
1230 struct wpi_softc *sc = device_get_softc(dev);
1231 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
1232
1233 pci_write_config(dev, 0x41, 0, 1);
1234
1235 ieee80211_resume_all(ic);
1236 return 0;
1237 }
1238
1239 /**
1240 * Called by net80211 when ever there is a change to 80211 state machine
1241 */
1242 static int
1243 wpi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
1244 {
1245 struct wpi_vap *wvp = WPI_VAP(vap);
1246 struct ieee80211com *ic = vap->iv_ic;
1247 struct ifnet *ifp = ic->ic_ifp;
1248 struct wpi_softc *sc = ifp->if_softc;
1249 int error;
1250
1251 DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
1252 ieee80211_state_name[vap->iv_state],
1253 ieee80211_state_name[nstate], sc->flags));
1254
1255 IEEE80211_UNLOCK(ic);
1256 WPI_LOCK(sc);
1257 if (nstate == IEEE80211_S_SCAN && vap->iv_state != IEEE80211_S_INIT) {
1258 /*
1259 * On !INIT -> SCAN transitions, we need to clear any possible
1260 * knowledge about associations.
1261 */
1262 error = wpi_config(sc);
1263 if (error != 0) {
1264 device_printf(sc->sc_dev,
1265 "%s: device config failed, error %d\n",
1266 __func__, error);
1267 }
1268 }
1269 if (nstate == IEEE80211_S_AUTH ||
1270 (nstate == IEEE80211_S_ASSOC && vap->iv_state == IEEE80211_S_RUN)) {
1271 /*
1272 * The node must be registered in the firmware before auth.
1273 * Also the associd must be cleared on RUN -> ASSOC
1274 * transitions.
1275 */
1276 error = wpi_auth(sc, vap);
1277 if (error != 0) {
1278 device_printf(sc->sc_dev,
1279 "%s: could not move to auth state, error %d\n",
1280 __func__, error);
1281 }
1282 }
1283 if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) {
1284 error = wpi_run(sc, vap);
1285 if (error != 0) {
1286 device_printf(sc->sc_dev,
1287 "%s: could not move to run state, error %d\n",
1288 __func__, error);
1289 }
1290 }
1291 if (nstate == IEEE80211_S_RUN) {
1292 /* RUN -> RUN transition; just restart the timers */
1293 wpi_calib_timeout(sc);
1294 /* XXX split out rate control timer */
1295 }
1296 WPI_UNLOCK(sc);
1297 IEEE80211_LOCK(ic);
1298 return wvp->newstate(vap, nstate, arg);
1299 }
1300
1301 /*
1302 * Grab exclusive access to NIC memory.
1303 */
1304 static void
1305 wpi_mem_lock(struct wpi_softc *sc)
1306 {
1307 int ntries;
1308 uint32_t tmp;
1309
1310 tmp = WPI_READ(sc, WPI_GPIO_CTL);
1311 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC);
1312
1313 /* spin until we actually get the lock */
1314 for (ntries = 0; ntries < 100; ntries++) {
1315 if ((WPI_READ(sc, WPI_GPIO_CTL) &
1316 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK)
1317 break;
1318 DELAY(10);
1319 }
1320 if (ntries == 100)
1321 device_printf(sc->sc_dev, "could not lock memory\n");
1322 }
1323
1324 /*
1325 * Release lock on NIC memory.
1326 */
1327 static void
1328 wpi_mem_unlock(struct wpi_softc *sc)
1329 {
1330 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL);
1331 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC);
1332 }
1333
1334 static uint32_t
1335 wpi_mem_read(struct wpi_softc *sc, uint16_t addr)
1336 {
1337 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr);
1338 return WPI_READ(sc, WPI_READ_MEM_DATA);
1339 }
1340
1341 static void
1342 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data)
1343 {
1344 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr);
1345 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data);
1346 }
1347
1348 static void
1349 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr,
1350 const uint32_t *data, int wlen)
1351 {
1352 for (; wlen > 0; wlen--, data++, addr+=4)
1353 wpi_mem_write(sc, addr, *data);
1354 }
1355
1356 /*
1357 * Read data from the EEPROM. We access EEPROM through the MAC instead of
1358 * using the traditional bit-bang method. Data is read up until len bytes have
1359 * been obtained.
1360 */
1361 static uint16_t
1362 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len)
1363 {
1364 int ntries;
1365 uint32_t val;
1366 uint8_t *out = data;
1367
1368 wpi_mem_lock(sc);
1369
1370 for (; len > 0; len -= 2, addr++) {
1371 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2);
1372
1373 for (ntries = 0; ntries < 10; ntries++) {
1374 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY)
1375 break;
1376 DELAY(5);
1377 }
1378
1379 if (ntries == 10) {
1380 device_printf(sc->sc_dev, "could not read EEPROM\n");
1381 return ETIMEDOUT;
1382 }
1383
1384 *out++= val >> 16;
1385 if (len > 1)
1386 *out ++= val >> 24;
1387 }
1388
1389 wpi_mem_unlock(sc);
1390
1391 return 0;
1392 }
1393
1394 /*
1395 * The firmware text and data segments are transferred to the NIC using DMA.
1396 * The driver just copies the firmware into DMA-safe memory and tells the NIC
1397 * where to find it. Once the NIC has copied the firmware into its internal
1398 * memory, we can free our local copy in the driver.
1399 */
1400 static int
1401 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *fw, int size)
1402 {
1403 int error, ntries;
1404
1405 DPRINTFN(WPI_DEBUG_HW,("Loading microcode size 0x%x\n", size));
1406
1407 size /= sizeof(uint32_t);
1408
1409 wpi_mem_lock(sc);
1410
1411 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE,
1412 (const uint32_t *)fw, size);
1413
1414 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0);
1415 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT);
1416 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size);
1417
1418 /* run microcode */
1419 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN);
1420
1421 /* wait while the adapter is busy copying the firmware */
1422 for (error = 0, ntries = 0; ntries < 1000; ntries++) {
1423 uint32_t status = WPI_READ(sc, WPI_TX_STATUS);
1424 DPRINTFN(WPI_DEBUG_HW,
1425 ("firmware status=0x%x, val=0x%x, result=0x%x\n", status,
1426 WPI_TX_IDLE(6), status & WPI_TX_IDLE(6)));
1427 if (status & WPI_TX_IDLE(6)) {
1428 DPRINTFN(WPI_DEBUG_HW,
1429 ("Status Match! - ntries = %d\n", ntries));
1430 break;
1431 }
1432 DELAY(10);
1433 }
1434 if (ntries == 1000) {
1435 device_printf(sc->sc_dev, "timeout transferring firmware\n");
1436 error = ETIMEDOUT;
1437 }
1438
1439 /* start the microcode executing */
1440 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE);
1441
1442 wpi_mem_unlock(sc);
1443
1444 return (error);
1445 }
1446
1447 static void
1448 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc,
1449 struct wpi_rx_data *data)
1450 {
1451 struct ifnet *ifp = sc->sc_ifp;
1452 struct ieee80211com *ic = ifp->if_l2com;
1453 struct wpi_rx_ring *ring = &sc->rxq;
1454 struct wpi_rx_stat *stat;
1455 struct wpi_rx_head *head;
1456 struct wpi_rx_tail *tail;
1457 struct ieee80211_node *ni;
1458 struct mbuf *m, *mnew;
1459 bus_addr_t paddr;
1460 int error;
1461
1462 stat = (struct wpi_rx_stat *)(desc + 1);
1463
1464 if (stat->len > WPI_STAT_MAXLEN) {
1465 device_printf(sc->sc_dev, "invalid rx statistic header\n");
1466 ifp->if_ierrors++;
1467 return;
1468 }
1469
1470 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_POSTREAD);
1471 head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len);
1472 tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + le16toh(head->len));
1473
1474 DPRINTFN(WPI_DEBUG_RX, ("rx intr: idx=%d len=%d stat len=%d rssi=%d "
1475 "rate=%x chan=%d tstamp=%ju\n", ring->cur, le32toh(desc->len),
1476 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan,
1477 (uintmax_t)le64toh(tail->tstamp)));
1478
1479 /* discard Rx frames with bad CRC early */
1480 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) {
1481 DPRINTFN(WPI_DEBUG_RX, ("%s: rx flags error %x\n", __func__,
1482 le32toh(tail->flags)));
1483 ifp->if_ierrors++;
1484 return;
1485 }
1486 if (le16toh(head->len) < sizeof (struct ieee80211_frame)) {
1487 DPRINTFN(WPI_DEBUG_RX, ("%s: frame too short: %d\n", __func__,
1488 le16toh(head->len)));
1489 ifp->if_ierrors++;
1490 return;
1491 }
1492
1493 /* XXX don't need mbuf, just dma buffer */
1494 mnew = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
1495 if (mnew == NULL) {
1496 DPRINTFN(WPI_DEBUG_RX, ("%s: no mbuf to restock ring\n",
1497 __func__));
1498 ifp->if_ierrors++;
1499 return;
1500 }
1501 bus_dmamap_unload(ring->data_dmat, data->map);
1502
1503 error = bus_dmamap_load(ring->data_dmat, data->map,
1504 mtod(mnew, caddr_t), MJUMPAGESIZE,
1505 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT);
1506 if (error != 0 && error != EFBIG) {
1507 device_printf(sc->sc_dev,
1508 "%s: bus_dmamap_load failed, error %d\n", __func__, error);
1509 m_freem(mnew);
1510 ifp->if_ierrors++;
1511 return;
1512 }
1513 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1514
1515 /* finalize mbuf and swap in new one */
1516 m = data->m;
1517 m->m_pkthdr.rcvif = ifp;
1518 m->m_data = (caddr_t)(head + 1);
1519 m->m_pkthdr.len = m->m_len = le16toh(head->len);
1520
1521 data->m = mnew;
1522 /* update Rx descriptor */
1523 ring->desc[ring->cur] = htole32(paddr);
1524
1525 if (ieee80211_radiotap_active(ic)) {
1526 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap;
1527
1528 tap->wr_flags = 0;
1529 tap->wr_chan_freq =
1530 htole16(ic->ic_channels[head->chan].ic_freq);
1531 tap->wr_chan_flags =
1532 htole16(ic->ic_channels[head->chan].ic_flags);
1533 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET);
1534 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise);
1535 tap->wr_tsft = tail->tstamp;
1536 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf;
1537 switch (head->rate) {
1538 /* CCK rates */
1539 case 10: tap->wr_rate = 2; break;
1540 case 20: tap->wr_rate = 4; break;
1541 case 55: tap->wr_rate = 11; break;
1542 case 110: tap->wr_rate = 22; break;
1543 /* OFDM rates */
1544 case 0xd: tap->wr_rate = 12; break;
1545 case 0xf: tap->wr_rate = 18; break;
1546 case 0x5: tap->wr_rate = 24; break;
1547 case 0x7: tap->wr_rate = 36; break;
1548 case 0x9: tap->wr_rate = 48; break;
1549 case 0xb: tap->wr_rate = 72; break;
1550 case 0x1: tap->wr_rate = 96; break;
1551 case 0x3: tap->wr_rate = 108; break;
1552 /* unknown rate: should not happen */
1553 default: tap->wr_rate = 0;
1554 }
1555 if (le16toh(head->flags) & 0x4)
1556 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
1557 }
1558
1559 WPI_UNLOCK(sc);
1560
1561 ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1562 if (ni != NULL) {
1563 (void) ieee80211_input(ni, m, stat->rssi, 0);
1564 ieee80211_free_node(ni);
1565 } else
1566 (void) ieee80211_input_all(ic, m, stat->rssi, 0);
1567
1568 WPI_LOCK(sc);
1569 }
1570
1571 static void
1572 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc)
1573 {
1574 struct ifnet *ifp = sc->sc_ifp;
1575 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3];
1576 struct wpi_tx_data *txdata = &ring->data[desc->idx];
1577 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1);
1578 struct ieee80211_node *ni = txdata->ni;
1579 struct ieee80211vap *vap = ni->ni_vap;
1580 int retrycnt = 0;
1581
1582 DPRINTFN(WPI_DEBUG_TX, ("tx done: qid=%d idx=%d retries=%d nkill=%d "
1583 "rate=%x duration=%d status=%x\n", desc->qid, desc->idx,
1584 stat->ntries, stat->nkill, stat->rate, le32toh(stat->duration),
1585 le32toh(stat->status)));
1586
1587 /*
1588 * Update rate control statistics for the node.
1589 * XXX we should not count mgmt frames since they're always sent at
1590 * the lowest available bit-rate.
1591 * XXX frames w/o ACK shouldn't be used either
1592 */
1593 if (stat->ntries > 0) {
1594 DPRINTFN(WPI_DEBUG_TX, ("%d retries\n", stat->ntries));
1595 retrycnt = 1;
1596 }
1597 ieee80211_ratectl_tx_complete(vap, ni, IEEE80211_RATECTL_TX_SUCCESS,
1598 &retrycnt, NULL);
1599
1600 /* XXX oerrors should only count errors !maxtries */
1601 if ((le32toh(stat->status) & 0xff) != 1)
1602 ifp->if_oerrors++;
1603 else
1604 ifp->if_opackets++;
1605
1606 bus_dmamap_sync(ring->data_dmat, txdata->map, BUS_DMASYNC_POSTWRITE);
1607 bus_dmamap_unload(ring->data_dmat, txdata->map);
1608 /* XXX handle M_TXCB? */
1609 m_freem(txdata->m);
1610 txdata->m = NULL;
1611 ieee80211_free_node(txdata->ni);
1612 txdata->ni = NULL;
1613
1614 ring->queued--;
1615
1616 sc->sc_tx_timer = 0;
1617 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1618 wpi_start_locked(ifp);
1619 }
1620
1621 static void
1622 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc)
1623 {
1624 struct wpi_tx_ring *ring = &sc->cmdq;
1625 struct wpi_tx_data *data;
1626
1627 DPRINTFN(WPI_DEBUG_CMD, ("cmd notification qid=%x idx=%d flags=%x "
1628 "type=%s len=%d\n", desc->qid, desc->idx,
1629 desc->flags, wpi_cmd_str(desc->type),
1630 le32toh(desc->len)));
1631
1632 if ((desc->qid & 7) != 4)
1633 return; /* not a command ack */
1634
1635 data = &ring->data[desc->idx];
1636
1637 /* if the command was mapped in a mbuf, free it */
1638 if (data->m != NULL) {
1639 bus_dmamap_unload(ring->data_dmat, data->map);
1640 m_freem(data->m);
1641 data->m = NULL;
1642 }
1643
1644 sc->flags &= ~WPI_FLAG_BUSY;
1645 wakeup(&ring->cmd[desc->idx]);
1646 }
1647
1648 static void
1649 wpi_notif_intr(struct wpi_softc *sc)
1650 {
1651 struct ifnet *ifp = sc->sc_ifp;
1652 struct ieee80211com *ic = ifp->if_l2com;
1653 struct wpi_rx_desc *desc;
1654 struct wpi_rx_data *data;
1655 uint32_t hw;
1656
1657 bus_dmamap_sync(sc->shared_dma.tag, sc->shared_dma.map,
1658 BUS_DMASYNC_POSTREAD);
1659
1660 hw = le32toh(sc->shared->next);
1661 while (sc->rxq.cur != hw) {
1662 data = &sc->rxq.data[sc->rxq.cur];
1663
1664 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1665 BUS_DMASYNC_POSTREAD);
1666 desc = (void *)data->m->m_ext.ext_buf;
1667
1668 DPRINTFN(WPI_DEBUG_NOTIFY,
1669 ("notify qid=%x idx=%d flags=%x type=%d len=%d\n",
1670 desc->qid,
1671 desc->idx,
1672 desc->flags,
1673 desc->type,
1674 le32toh(desc->len)));
1675
1676 if (!(desc->qid & 0x80)) /* reply to a command */
1677 wpi_cmd_intr(sc, desc);
1678
1679 switch (desc->type) {
1680 case WPI_RX_DONE:
1681 /* a 802.11 frame was received */
1682 wpi_rx_intr(sc, desc, data);
1683 break;
1684
1685 case WPI_TX_DONE:
1686 /* a 802.11 frame has been transmitted */
1687 wpi_tx_intr(sc, desc);
1688 break;
1689
1690 case WPI_UC_READY:
1691 {
1692 struct wpi_ucode_info *uc =
1693 (struct wpi_ucode_info *)(desc + 1);
1694
1695 /* the microcontroller is ready */
1696 DPRINTF(("microcode alive notification version %x "
1697 "alive %x\n", le32toh(uc->version),
1698 le32toh(uc->valid)));
1699
1700 if (le32toh(uc->valid) != 1) {
1701 device_printf(sc->sc_dev,
1702 "microcontroller initialization failed\n");
1703 wpi_stop_locked(sc);
1704 }
1705 break;
1706 }
1707 case WPI_STATE_CHANGED:
1708 {
1709 uint32_t *status = (uint32_t *)(desc + 1);
1710
1711 /* enabled/disabled notification */
1712 DPRINTF(("state changed to %x\n", le32toh(*status)));
1713
1714 if (le32toh(*status) & 1) {
1715 device_printf(sc->sc_dev,
1716 "Radio transmitter is switched off\n");
1717 sc->flags |= WPI_FLAG_HW_RADIO_OFF;
1718 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1719 /* Disable firmware commands */
1720 WPI_WRITE(sc, WPI_UCODE_SET, WPI_DISABLE_CMD);
1721 }
1722 break;
1723 }
1724 case WPI_START_SCAN:
1725 {
1726 #ifdef WPI_DEBUG
1727 struct wpi_start_scan *scan =
1728 (struct wpi_start_scan *)(desc + 1);
1729 #endif
1730
1731 DPRINTFN(WPI_DEBUG_SCANNING,
1732 ("scanning channel %d status %x\n",
1733 scan->chan, le32toh(scan->status)));
1734 break;
1735 }
1736 case WPI_STOP_SCAN:
1737 {
1738 #ifdef WPI_DEBUG
1739 struct wpi_stop_scan *scan =
1740 (struct wpi_stop_scan *)(desc + 1);
1741 #endif
1742 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1743
1744 DPRINTFN(WPI_DEBUG_SCANNING,
1745 ("scan finished nchan=%d status=%d chan=%d\n",
1746 scan->nchan, scan->status, scan->chan));
1747
1748 sc->sc_scan_timer = 0;
1749 ieee80211_scan_next(vap);
1750 break;
1751 }
1752 case WPI_MISSED_BEACON:
1753 {
1754 struct wpi_missed_beacon *beacon =
1755 (struct wpi_missed_beacon *)(desc + 1);
1756 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1757
1758 if (le32toh(beacon->consecutive) >=
1759 vap->iv_bmissthreshold) {
1760 DPRINTF(("Beacon miss: %u >= %u\n",
1761 le32toh(beacon->consecutive),
1762 vap->iv_bmissthreshold));
1763 ieee80211_beacon_miss(ic);
1764 }
1765 break;
1766 }
1767 }
1768
1769 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT;
1770 }
1771
1772 /* tell the firmware what we have processed */
1773 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1;
1774 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7);
1775 }
1776
1777 static void
1778 wpi_intr(void *arg)
1779 {
1780 struct wpi_softc *sc = arg;
1781 uint32_t r;
1782
1783 WPI_LOCK(sc);
1784
1785 r = WPI_READ(sc, WPI_INTR);
1786 if (r == 0 || r == 0xffffffff) {
1787 WPI_UNLOCK(sc);
1788 return;
1789 }
1790
1791 /* disable interrupts */
1792 WPI_WRITE(sc, WPI_MASK, 0);
1793 /* ack interrupts */
1794 WPI_WRITE(sc, WPI_INTR, r);
1795
1796 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) {
1797 struct ifnet *ifp = sc->sc_ifp;
1798 struct ieee80211com *ic = ifp->if_l2com;
1799 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1800
1801 device_printf(sc->sc_dev, "fatal firmware error\n");
1802 DPRINTFN(6,("(%s)\n", (r & WPI_SW_ERROR) ? "(Software Error)" :
1803 "(Hardware Error)"));
1804 if (vap != NULL)
1805 ieee80211_cancel_scan(vap);
1806 ieee80211_runtask(ic, &sc->sc_restarttask);
1807 sc->flags &= ~WPI_FLAG_BUSY;
1808 WPI_UNLOCK(sc);
1809 return;
1810 }
1811
1812 if (r & WPI_RX_INTR)
1813 wpi_notif_intr(sc);
1814
1815 if (r & WPI_ALIVE_INTR) /* firmware initialized */
1816 wakeup(sc);
1817
1818 /* re-enable interrupts */
1819 if (sc->sc_ifp->if_flags & IFF_UP)
1820 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK);
1821
1822 WPI_UNLOCK(sc);
1823 }
1824
1825 static uint8_t
1826 wpi_plcp_signal(int rate)
1827 {
1828 switch (rate) {
1829 /* CCK rates (returned values are device-dependent) */
1830 case 2: return 10;
1831 case 4: return 20;
1832 case 11: return 55;
1833 case 22: return 110;
1834
1835 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1836 /* R1-R4 (ral/ural is R4-R1) */
1837 case 12: return 0xd;
1838 case 18: return 0xf;
1839 case 24: return 0x5;
1840 case 36: return 0x7;
1841 case 48: return 0x9;
1842 case 72: return 0xb;
1843 case 96: return 0x1;
1844 case 108: return 0x3;
1845
1846 /* unsupported rates (should not get there) */
1847 default: return 0;
1848 }
1849 }
1850
1851 /* quickly determine if a given rate is CCK or OFDM */
1852 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22)
1853
1854 /*
1855 * Construct the data packet for a transmit buffer and acutally put
1856 * the buffer onto the transmit ring, kicking the card to process the
1857 * the buffer.
1858 */
1859 static int
1860 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
1861 int ac)
1862 {
1863 struct ieee80211vap *vap = ni->ni_vap;
1864 struct ifnet *ifp = sc->sc_ifp;
1865 struct ieee80211com *ic = ifp->if_l2com;
1866 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams;
1867 struct wpi_tx_ring *ring = &sc->txq[ac];
1868 struct wpi_tx_desc *desc;
1869 struct wpi_tx_data *data;
1870 struct wpi_tx_cmd *cmd;
1871 struct wpi_cmd_data *tx;
1872 struct ieee80211_frame *wh;
1873 const struct ieee80211_txparam *tp;
1874 struct ieee80211_key *k;
1875 struct mbuf *mnew;
1876 int i, error, nsegs, rate, hdrlen, ismcast;
1877 bus_dma_segment_t segs[WPI_MAX_SCATTER];
1878
1879 desc = &ring->desc[ring->cur];
1880 data = &ring->data[ring->cur];
1881
1882 wh = mtod(m0, struct ieee80211_frame *);
1883
1884 hdrlen = ieee80211_hdrsize(wh);
1885 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1886
1887 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1888 k = ieee80211_crypto_encap(ni, m0);
1889 if (k == NULL) {
1890 m_freem(m0);
1891 return ENOBUFS;
1892 }
1893 /* packet header may have moved, reset our local pointer */
1894 wh = mtod(m0, struct ieee80211_frame *);
1895 }
1896
1897 cmd = &ring->cmd[ring->cur];
1898 cmd->code = WPI_CMD_TX_DATA;
1899 cmd->flags = 0;
1900 cmd->qid = ring->qid;
1901 cmd->idx = ring->cur;
1902
1903 tx = (struct wpi_cmd_data *)cmd->data;
1904 tx->flags = htole32(WPI_TX_AUTO_SEQ);
1905 tx->timeout = htole16(0);
1906 tx->ofdm_mask = 0xff;
1907 tx->cck_mask = 0x0f;
1908 tx->lifetime = htole32(WPI_LIFETIME_INFINITE);
1909 tx->id = ismcast ? WPI_ID_BROADCAST : WPI_ID_BSS;
1910 tx->len = htole16(m0->m_pkthdr.len);
1911
1912 if (!ismcast) {
1913 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0 ||
1914 !cap->cap_wmeParams[ac].wmep_noackPolicy)
1915 tx->flags |= htole32(WPI_TX_NEED_ACK);
1916 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) {
1917 tx->flags |= htole32(WPI_TX_NEED_RTS|WPI_TX_FULL_TXOP);
1918 tx->rts_ntries = 7;
1919 }
1920 }
1921 /* pick a rate */
1922 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)];
1923 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) {
1924 uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1925 /* tell h/w to set timestamp in probe responses */
1926 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1927 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP);
1928 if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ ||
1929 subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ)
1930 tx->timeout = htole16(3);
1931 else
1932 tx->timeout = htole16(2);
1933 rate = tp->mgmtrate;
1934 } else if (ismcast) {
1935 rate = tp->mcastrate;
1936 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
1937 rate = tp->ucastrate;
1938 } else {
1939 (void) ieee80211_ratectl_rate(ni, NULL, 0);
1940 rate = ni->ni_txrate;
1941 }
1942 tx->rate = wpi_plcp_signal(rate);
1943
1944 /* be very persistant at sending frames out */
1945 #if 0
1946 tx->data_ntries = tp->maxretry;
1947 #else
1948 tx->data_ntries = 15; /* XXX way too high */
1949 #endif
1950
1951 if (ieee80211_radiotap_active_vap(vap)) {
1952 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap;
1953 tap->wt_flags = 0;
1954 tap->wt_rate = rate;
1955 tap->wt_hwqueue = ac;
1956 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
1957 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1958
1959 ieee80211_radiotap_tx(vap, m0);
1960 }
1961
1962 /* save and trim IEEE802.11 header */
1963 m_copydata(m0, 0, hdrlen, (caddr_t)&tx->wh);
1964 m_adj(m0, hdrlen);
1965
1966 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m0, segs,
1967 &nsegs, BUS_DMA_NOWAIT);
1968 if (error != 0 && error != EFBIG) {
1969 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1970 error);
1971 m_freem(m0);
1972 return error;
1973 }
1974 if (error != 0) {
1975 /* XXX use m_collapse */
1976 mnew = m_defrag(m0, M_NOWAIT);
1977 if (mnew == NULL) {
1978 device_printf(sc->sc_dev,
1979 "could not defragment mbuf\n");
1980 m_freem(m0);
1981 return ENOBUFS;
1982 }
1983 m0 = mnew;
1984
1985 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map,
1986 m0, segs, &nsegs, BUS_DMA_NOWAIT);
1987 if (error != 0) {
1988 device_printf(sc->sc_dev,
1989 "could not map mbuf (error %d)\n", error);
1990 m_freem(m0);
1991 return error;
1992 }
1993 }
1994
1995 data->m = m0;
1996 data->ni = ni;
1997
1998 DPRINTFN(WPI_DEBUG_TX, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n",
1999 ring->qid, ring->cur, m0->m_pkthdr.len, nsegs));
2000
2001 /* first scatter/gather segment is used by the tx data command */
2002 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 |
2003 (1 + nsegs) << 24);
2004 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2005 ring->cur * sizeof (struct wpi_tx_cmd));
2006 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data));
2007 for (i = 1; i <= nsegs; i++) {
2008 desc->segs[i].addr = htole32(segs[i - 1].ds_addr);
2009 desc->segs[i].len = htole32(segs[i - 1].ds_len);
2010 }
2011
2012 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
2013 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
2014 BUS_DMASYNC_PREWRITE);
2015
2016 ring->queued++;
2017
2018 /* kick ring */
2019 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT;
2020 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2021
2022 return 0;
2023 }
2024
2025 /**
2026 * Process data waiting to be sent on the IFNET output queue
2027 */
2028 static void
2029 wpi_start(struct ifnet *ifp)
2030 {
2031 struct wpi_softc *sc = ifp->if_softc;
2032
2033 WPI_LOCK(sc);
2034 wpi_start_locked(ifp);
2035 WPI_UNLOCK(sc);
2036 }
2037
2038 static void
2039 wpi_start_locked(struct ifnet *ifp)
2040 {
2041 struct wpi_softc *sc = ifp->if_softc;
2042 struct ieee80211_node *ni;
2043 struct mbuf *m;
2044 int ac;
2045
2046 WPI_LOCK_ASSERT(sc);
2047
2048 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2049 return;
2050
2051 for (;;) {
2052 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
2053 if (m == NULL)
2054 break;
2055 ac = M_WME_GETAC(m);
2056 if (sc->txq[ac].queued > sc->txq[ac].count - 8) {
2057 /* there is no place left in this ring */
2058 IFQ_DRV_PREPEND(&ifp->if_snd, m);
2059 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2060 break;
2061 }
2062 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
2063 if (wpi_tx_data(sc, m, ni, ac) != 0) {
2064 ieee80211_free_node(ni);
2065 ifp->if_oerrors++;
2066 break;
2067 }
2068 sc->sc_tx_timer = 5;
2069 }
2070 }
2071
2072 static int
2073 wpi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2074 const struct ieee80211_bpf_params *params)
2075 {
2076 struct ieee80211com *ic = ni->ni_ic;
2077 struct ifnet *ifp = ic->ic_ifp;
2078 struct wpi_softc *sc = ifp->if_softc;
2079
2080 /* prevent management frames from being sent if we're not ready */
2081 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2082 m_freem(m);
2083 ieee80211_free_node(ni);
2084 return ENETDOWN;
2085 }
2086 WPI_LOCK(sc);
2087
2088 /* management frames go into ring 0 */
2089 if (sc->txq[0].queued > sc->txq[0].count - 8) {
2090 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2091 m_freem(m);
2092 WPI_UNLOCK(sc);
2093 ieee80211_free_node(ni);
2094 return ENOBUFS; /* XXX */
2095 }
2096
2097 ifp->if_opackets++;
2098 if (wpi_tx_data(sc, m, ni, 0) != 0)
2099 goto bad;
2100 sc->sc_tx_timer = 5;
2101 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
2102
2103 WPI_UNLOCK(sc);
2104 return 0;
2105 bad:
2106 ifp->if_oerrors++;
2107 WPI_UNLOCK(sc);
2108 ieee80211_free_node(ni);
2109 return EIO; /* XXX */
2110 }
2111
2112 static int
2113 wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2114 {
2115 struct wpi_softc *sc = ifp->if_softc;
2116 struct ieee80211com *ic = ifp->if_l2com;
2117 struct ifreq *ifr = (struct ifreq *) data;
2118 int error = 0, startall = 0;
2119
2120 switch (cmd) {
2121 case SIOCSIFFLAGS:
2122 WPI_LOCK(sc);
2123 if ((ifp->if_flags & IFF_UP)) {
2124 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2125 wpi_init_locked(sc, 0);
2126 startall = 1;
2127 }
2128 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) ||
2129 (sc->flags & WPI_FLAG_HW_RADIO_OFF))
2130 wpi_stop_locked(sc);
2131 WPI_UNLOCK(sc);
2132 if (startall)
2133 ieee80211_start_all(ic);
2134 break;
2135 case SIOCGIFMEDIA:
2136 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2137 break;
2138 case SIOCGIFADDR:
2139 error = ether_ioctl(ifp, cmd, data);
2140 break;
2141 default:
2142 error = EINVAL;
2143 break;
2144 }
2145 return error;
2146 }
2147
2148 /*
2149 * Extract various information from EEPROM.
2150 */
2151 static void
2152 wpi_read_eeprom(struct wpi_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN])
2153 {
2154 int i;
2155
2156 /* read the hardware capabilities, revision and SKU type */
2157 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap,1);
2158 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev,2);
2159 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1);
2160
2161 /* read the regulatory domain */
2162 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, sc->domain, 4);
2163
2164 /* read in the hw MAC address */
2165 wpi_read_prom_data(sc, WPI_EEPROM_MAC, macaddr, 6);
2166
2167 /* read the list of authorized channels */
2168 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++)
2169 wpi_read_eeprom_channels(sc,i);
2170
2171 /* read the power level calibration info for each group */
2172 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++)
2173 wpi_read_eeprom_group(sc,i);
2174 }
2175
2176 /*
2177 * Send a command to the firmware.
2178 */
2179 static int
2180 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async)
2181 {
2182 struct wpi_tx_ring *ring = &sc->cmdq;
2183 struct wpi_tx_desc *desc;
2184 struct wpi_tx_cmd *cmd;
2185
2186 #ifdef WPI_DEBUG
2187 if (!async) {
2188 WPI_LOCK_ASSERT(sc);
2189 }
2190 #endif
2191
2192 DPRINTFN(WPI_DEBUG_CMD,("wpi_cmd %d size %d async %d\n", code, size,
2193 async));
2194
2195 if (sc->flags & WPI_FLAG_BUSY) {
2196 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
2197 __func__, code);
2198 return EAGAIN;
2199 }
2200 sc->flags|= WPI_FLAG_BUSY;
2201
2202 KASSERT(size <= sizeof cmd->data, ("command %d too large: %d bytes",
2203 code, size));
2204
2205 desc = &ring->desc[ring->cur];
2206 cmd = &ring->cmd[ring->cur];
2207
2208 cmd->code = code;
2209 cmd->flags = 0;
2210 cmd->qid = ring->qid;
2211 cmd->idx = ring->cur;
2212 memcpy(cmd->data, buf, size);
2213
2214 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24);
2215 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2216 ring->cur * sizeof (struct wpi_tx_cmd));
2217 desc->segs[0].len = htole32(4 + size);
2218
2219 /* kick cmd ring */
2220 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2221 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2222
2223 if (async) {
2224 sc->flags &= ~ WPI_FLAG_BUSY;
2225 return 0;
2226 }
2227
2228 return msleep(cmd, &sc->sc_mtx, PCATCH, "wpicmd", hz);
2229 }
2230
2231 static int
2232 wpi_wme_update(struct ieee80211com *ic)
2233 {
2234 #define WPI_EXP2(v) htole16((1 << (v)) - 1)
2235 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v))
2236 struct wpi_softc *sc = ic->ic_ifp->if_softc;
2237 const struct wmeParams *wmep;
2238 struct wpi_wme_setup wme;
2239 int ac;
2240
2241 /* don't override default WME values if WME is not actually enabled */
2242 if (!(ic->ic_flags & IEEE80211_F_WME))
2243 return 0;
2244
2245 wme.flags = 0;
2246 for (ac = 0; ac < WME_NUM_AC; ac++) {
2247 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
2248 wme.ac[ac].aifsn = wmep->wmep_aifsn;
2249 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin);
2250 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax);
2251 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit);
2252
2253 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d "
2254 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin,
2255 wme.ac[ac].cwmax, wme.ac[ac].txop));
2256 }
2257 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1);
2258 #undef WPI_USEC
2259 #undef WPI_EXP2
2260 }
2261
2262 /*
2263 * Configure h/w multi-rate retries.
2264 */
2265 static int
2266 wpi_mrr_setup(struct wpi_softc *sc)
2267 {
2268 struct ifnet *ifp = sc->sc_ifp;
2269 struct ieee80211com *ic = ifp->if_l2com;
2270 struct wpi_mrr_setup mrr;
2271 int i, error;
2272
2273 memset(&mrr, 0, sizeof (struct wpi_mrr_setup));
2274
2275 /* CCK rates (not used with 802.11a) */
2276 for (i = WPI_CCK1; i <= WPI_CCK11; i++) {
2277 mrr.rates[i].flags = 0;
2278 mrr.rates[i].signal = wpi_ridx_to_plcp[i];
2279 /* fallback to the immediate lower CCK rate (if any) */
2280 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1;
2281 /* try one time at this rate before falling back to "next" */
2282 mrr.rates[i].ntries = 1;
2283 }
2284
2285 /* OFDM rates (not used with 802.11b) */
2286 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) {
2287 mrr.rates[i].flags = 0;
2288 mrr.rates[i].signal = wpi_ridx_to_plcp[i];
2289 /* fallback to the immediate lower OFDM rate (if any) */
2290 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */
2291 mrr.rates[i].next = (i == WPI_OFDM6) ?
2292 ((ic->ic_curmode == IEEE80211_MODE_11A) ?
2293 WPI_OFDM6 : WPI_CCK2) :
2294 i - 1;
2295 /* try one time at this rate before falling back to "next" */
2296 mrr.rates[i].ntries = 1;
2297 }
2298
2299 /* setup MRR for control frames */
2300 mrr.which = WPI_MRR_CTL;
2301 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0);
2302 if (error != 0) {
2303 device_printf(sc->sc_dev,
2304 "could not setup MRR for control frames\n");
2305 return error;
2306 }
2307
2308 /* setup MRR for data frames */
2309 mrr.which = WPI_MRR_DATA;
2310 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0);
2311 if (error != 0) {
2312 device_printf(sc->sc_dev,
2313 "could not setup MRR for data frames\n");
2314 return error;
2315 }
2316
2317 return 0;
2318 }
2319
2320 static void
2321 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on)
2322 {
2323 struct wpi_cmd_led led;
2324
2325 led.which = which;
2326 led.unit = htole32(100000); /* on/off in unit of 100ms */
2327 led.off = off;
2328 led.on = on;
2329
2330 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1);
2331 }
2332
2333 static void
2334 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni)
2335 {
2336 struct wpi_cmd_tsf tsf;
2337 uint64_t val, mod;
2338
2339 memset(&tsf, 0, sizeof tsf);
2340 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8);
2341 tsf.bintval = htole16(ni->ni_intval);
2342 tsf.lintval = htole16(10);
2343
2344 /* compute remaining time until next beacon */
2345 val = (uint64_t)ni->ni_intval * 1024; /* msec -> usec */
2346 mod = le64toh(tsf.tstamp) % val;
2347 tsf.binitval = htole32((uint32_t)(val - mod));
2348
2349 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0)
2350 device_printf(sc->sc_dev, "could not enable TSF\n");
2351 }
2352
2353 #if 0
2354 /*
2355 * Build a beacon frame that the firmware will broadcast periodically in
2356 * IBSS or HostAP modes.
2357 */
2358 static int
2359 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni)
2360 {
2361 struct ifnet *ifp = sc->sc_ifp;
2362 struct ieee80211com *ic = ifp->if_l2com;
2363 struct wpi_tx_ring *ring = &sc->cmdq;
2364 struct wpi_tx_desc *desc;
2365 struct wpi_tx_data *data;
2366 struct wpi_tx_cmd *cmd;
2367 struct wpi_cmd_beacon *bcn;
2368 struct ieee80211_beacon_offsets bo;
2369 struct mbuf *m0;
2370 bus_addr_t physaddr;
2371 int error;
2372
2373 desc = &ring->desc[ring->cur];
2374 data = &ring->data[ring->cur];
2375
2376 m0 = ieee80211_beacon_alloc(ic, ni, &bo);
2377 if (m0 == NULL) {
2378 device_printf(sc->sc_dev, "could not allocate beacon frame\n");
2379 return ENOMEM;
2380 }
2381
2382 cmd = &ring->cmd[ring->cur];
2383 cmd->code = WPI_CMD_SET_BEACON;
2384 cmd->flags = 0;
2385 cmd->qid = ring->qid;
2386 cmd->idx = ring->cur;
2387
2388 bcn = (struct wpi_cmd_beacon *)cmd->data;
2389 memset(bcn, 0, sizeof (struct wpi_cmd_beacon));
2390 bcn->id = WPI_ID_BROADCAST;
2391 bcn->ofdm_mask = 0xff;
2392 bcn->cck_mask = 0x0f;
2393 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE);
2394 bcn->len = htole16(m0->m_pkthdr.len);
2395 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ?
2396 wpi_plcp_signal(12) : wpi_plcp_signal(2);
2397 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP);
2398
2399 /* save and trim IEEE802.11 header */
2400 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (caddr_t)&bcn->wh);
2401 m_adj(m0, sizeof (struct ieee80211_frame));
2402
2403 /* assume beacon frame is contiguous */
2404 error = bus_dmamap_load(ring->data_dmat, data->map, mtod(m0, void *),
2405 m0->m_pkthdr.len, wpi_dma_map_addr, &physaddr, 0);
2406 if (error != 0) {
2407 device_printf(sc->sc_dev, "could not map beacon\n");
2408 m_freem(m0);
2409 return error;
2410 }
2411
2412 data->m = m0;
2413
2414 /* first scatter/gather segment is used by the beacon command */
2415 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24);
2416 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2417 ring->cur * sizeof (struct wpi_tx_cmd));
2418 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon));
2419 desc->segs[1].addr = htole32(physaddr);
2420 desc->segs[1].len = htole32(m0->m_pkthdr.len);
2421
2422 /* kick cmd ring */
2423 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2424 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2425
2426 return 0;
2427 }
2428 #endif
2429
2430 static int
2431 wpi_auth(struct wpi_softc *sc, struct ieee80211vap *vap)
2432 {
2433 struct ieee80211com *ic = vap->iv_ic;
2434 struct ieee80211_node *ni = vap->iv_bss;
2435 struct wpi_node_info node;
2436 int error;
2437
2438
2439 /* update adapter's configuration */
2440 sc->config.associd = 0;
2441 sc->config.filter &= ~htole32(WPI_FILTER_BSS);
2442 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid);
2443 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan);
2444 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
2445 sc->config.flags |= htole32(WPI_CONFIG_AUTO |
2446 WPI_CONFIG_24GHZ);
2447 } else {
2448 sc->config.flags &= ~htole32(WPI_CONFIG_AUTO |
2449 WPI_CONFIG_24GHZ);
2450 }
2451 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) {
2452 sc->config.cck_mask = 0;
2453 sc->config.ofdm_mask = 0x15;
2454 } else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) {
2455 sc->config.cck_mask = 0x03;
2456 sc->config.ofdm_mask = 0;
2457 } else {
2458 /* XXX assume 802.11b/g */
2459 sc->config.cck_mask = 0x0f;
2460 sc->config.ofdm_mask = 0x15;
2461 }
2462
2463 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan,
2464 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask));
2465 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
2466 sizeof (struct wpi_config), 1);
2467 if (error != 0) {
2468 device_printf(sc->sc_dev, "could not configure\n");
2469 return error;
2470 }
2471
2472 /* configuration has changed, set Tx power accordingly */
2473 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) {
2474 device_printf(sc->sc_dev, "could not set Tx power\n");
2475 return error;
2476 }
2477
2478 /* add default node */
2479 memset(&node, 0, sizeof node);
2480 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid);
2481 node.id = WPI_ID_BSS;
2482 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ?
2483 wpi_plcp_signal(12) : wpi_plcp_signal(2);
2484 node.action = htole32(WPI_ACTION_SET_RATE);
2485 node.antenna = WPI_ANTENNA_BOTH;
2486 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1);
2487 if (error != 0)
2488 device_printf(sc->sc_dev, "could not add BSS node\n");
2489
2490 return (error);
2491 }
2492
2493 static int
2494 wpi_run(struct wpi_softc *sc, struct ieee80211vap *vap)
2495 {
2496 struct ieee80211com *ic = vap->iv_ic;
2497 struct ieee80211_node *ni = vap->iv_bss;
2498 int error;
2499
2500 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
2501 /* link LED blinks while monitoring */
2502 wpi_set_led(sc, WPI_LED_LINK, 5, 5);
2503 return 0;
2504 }
2505
2506 wpi_enable_tsf(sc, ni);
2507
2508 /* update adapter's configuration */
2509 sc->config.associd = htole16(ni->ni_associd & ~0xc000);
2510 /* short preamble/slot time are negotiated when associating */
2511 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE |
2512 WPI_CONFIG_SHSLOT);
2513 if (ic->ic_flags & IEEE80211_F_SHSLOT)
2514 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT);
2515 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
2516 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE);
2517 sc->config.filter |= htole32(WPI_FILTER_BSS);
2518
2519 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */
2520
2521 DPRINTF(("config chan %d flags %x\n", sc->config.chan,
2522 sc->config.flags));
2523 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct
2524 wpi_config), 1);
2525 if (error != 0) {
2526 device_printf(sc->sc_dev, "could not update configuration\n");
2527 return error;
2528 }
2529
2530 error = wpi_set_txpower(sc, ni->ni_chan, 1);
2531 if (error != 0) {
2532 device_printf(sc->sc_dev, "could set txpower\n");
2533 return error;
2534 }
2535
2536 /* link LED always on while associated */
2537 wpi_set_led(sc, WPI_LED_LINK, 0, 1);
2538
2539 /* start automatic rate control timer */
2540 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc);
2541
2542 return (error);
2543 }
2544
2545 /*
2546 * Send a scan request to the firmware. Since this command is huge, we map it
2547 * into a mbufcluster instead of using the pre-allocated set of commands. Note,
2548 * much of this code is similar to that in wpi_cmd but because we must manually
2549 * construct the probe & channels, we duplicate what's needed here. XXX In the
2550 * future, this function should be modified to use wpi_cmd to help cleanup the
2551 * code base.
2552 */
2553 static int
2554 wpi_scan(struct wpi_softc *sc)
2555 {
2556 struct ifnet *ifp = sc->sc_ifp;
2557 struct ieee80211com *ic = ifp->if_l2com;
2558 struct ieee80211_scan_state *ss = ic->ic_scan;
2559 struct wpi_tx_ring *ring = &sc->cmdq;
2560 struct wpi_tx_desc *desc;
2561 struct wpi_tx_data *data;
2562 struct wpi_tx_cmd *cmd;
2563 struct wpi_scan_hdr *hdr;
2564 struct wpi_scan_chan *chan;
2565 struct ieee80211_frame *wh;
2566 struct ieee80211_rateset *rs;
2567 struct ieee80211_channel *c;
2568 enum ieee80211_phymode mode;
2569 uint8_t *frm;
2570 int nrates, pktlen, error, i, nssid;
2571 bus_addr_t physaddr;
2572
2573 desc = &ring->desc[ring->cur];
2574 data = &ring->data[ring->cur];
2575
2576 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
2577 if (data->m == NULL) {
2578 device_printf(sc->sc_dev,
2579 "could not allocate mbuf for scan command\n");
2580 return ENOMEM;
2581 }
2582
2583 cmd = mtod(data->m, struct wpi_tx_cmd *);
2584 cmd->code = WPI_CMD_SCAN;
2585 cmd->flags = 0;
2586 cmd->qid = ring->qid;
2587 cmd->idx = ring->cur;
2588
2589 hdr = (struct wpi_scan_hdr *)cmd->data;
2590 memset(hdr, 0, sizeof(struct wpi_scan_hdr));
2591
2592 /*
2593 * Move to the next channel if no packets are received within 5 msecs
2594 * after sending the probe request (this helps to reduce the duration
2595 * of active scans).
2596 */
2597 hdr->quiet = htole16(5);
2598 hdr->threshold = htole16(1);
2599
2600 if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) {
2601 /* send probe requests at 6Mbps */
2602 hdr->tx.rate = wpi_ridx_to_plcp[WPI_OFDM6];
2603
2604 /* Enable crc checking */
2605 hdr->promotion = htole16(1);
2606 } else {
2607 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO);
2608 /* send probe requests at 1Mbps */
2609 hdr->tx.rate = wpi_ridx_to_plcp[WPI_CCK1];
2610 }
2611 hdr->tx.id = WPI_ID_BROADCAST;
2612 hdr->tx.lifetime = htole32(WPI_LIFETIME_INFINITE);
2613 hdr->tx.flags = htole32(WPI_TX_AUTO_SEQ);
2614
2615 memset(hdr->scan_essids, 0, sizeof(hdr->scan_essids));
2616 nssid = MIN(ss->ss_nssid, WPI_SCAN_MAX_ESSIDS);
2617 for (i = 0; i < nssid; i++) {
2618 hdr->scan_essids[i].id = IEEE80211_ELEMID_SSID;
2619 hdr->scan_essids[i].esslen = MIN(ss->ss_ssid[i].len, 32);
2620 memcpy(hdr->scan_essids[i].essid, ss->ss_ssid[i].ssid,
2621 hdr->scan_essids[i].esslen);
2622 #ifdef WPI_DEBUG
2623 if (wpi_debug & WPI_DEBUG_SCANNING) {
2624 printf("Scanning Essid: ");
2625 ieee80211_print_essid(hdr->scan_essids[i].essid,
2626 hdr->scan_essids[i].esslen);
2627 printf("\n");
2628 }
2629 #endif
2630 }
2631
2632 /*
2633 * Build a probe request frame. Most of the following code is a
2634 * copy & paste of what is done in net80211.
2635 */
2636 wh = (struct ieee80211_frame *)&hdr->scan_essids[4];
2637 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
2638 IEEE80211_FC0_SUBTYPE_PROBE_REQ;
2639 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2640 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
2641 IEEE80211_ADDR_COPY(wh->i_addr2, IF_LLADDR(ifp));
2642 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr);
2643 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */
2644 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */
2645
2646 frm = (uint8_t *)(wh + 1);
2647
2648 /* add essid IE, the hardware will fill this in for us */
2649 *frm++ = IEEE80211_ELEMID_SSID;
2650 *frm++ = 0;
2651
2652 mode = ieee80211_chan2mode(ic->ic_curchan);
2653 rs = &ic->ic_sup_rates[mode];
2654
2655 /* add supported rates IE */
2656 *frm++ = IEEE80211_ELEMID_RATES;
2657 nrates = rs->rs_nrates;
2658 if (nrates > IEEE80211_RATE_SIZE)
2659 nrates = IEEE80211_RATE_SIZE;
2660 *frm++ = nrates;
2661 memcpy(frm, rs->rs_rates, nrates);
2662 frm += nrates;
2663
2664 /* add supported xrates IE */
2665 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
2666 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
2667 *frm++ = IEEE80211_ELEMID_XRATES;
2668 *frm++ = nrates;
2669 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
2670 frm += nrates;
2671 }
2672
2673 /* setup length of probe request */
2674 hdr->tx.len = htole16(frm - (uint8_t *)wh);
2675
2676 /*
2677 * Construct information about the channel that we
2678 * want to scan. The firmware expects this to be directly
2679 * after the scan probe request
2680 */
2681 c = ic->ic_curchan;
2682 chan = (struct wpi_scan_chan *)frm;
2683 chan->chan = ieee80211_chan2ieee(ic, c);
2684 chan->flags = 0;
2685 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) {
2686 chan->flags |= WPI_CHAN_ACTIVE;
2687 if (nssid != 0)
2688 chan->flags |= WPI_CHAN_DIRECT;
2689 }
2690 chan->gain_dsp = 0x6e; /* Default level */
2691 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2692 chan->active = htole16(10);
2693 chan->passive = htole16(ss->ss_maxdwell);
2694 chan->gain_radio = 0x3b;
2695 } else {
2696 chan->active = htole16(20);
2697 chan->passive = htole16(ss->ss_maxdwell);
2698 chan->gain_radio = 0x28;
2699 }
2700
2701 DPRINTFN(WPI_DEBUG_SCANNING,
2702 ("Scanning %u Passive: %d\n",
2703 chan->chan,
2704 c->ic_flags & IEEE80211_CHAN_PASSIVE));
2705
2706 hdr->nchan++;
2707 chan++;
2708
2709 frm += sizeof (struct wpi_scan_chan);
2710 #if 0
2711 // XXX All Channels....
2712 for (c = &ic->ic_channels[1];
2713 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) {
2714 if ((c->ic_flags & ic->ic_curchan->ic_flags) != ic->ic_curchan->ic_flags)
2715 continue;
2716
2717 chan->chan = ieee80211_chan2ieee(ic, c);
2718 chan->flags = 0;
2719 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) {
2720 chan->flags |= WPI_CHAN_ACTIVE;
2721 if (ic->ic_des_ssid[0].len != 0)
2722 chan->flags |= WPI_CHAN_DIRECT;
2723 }
2724 chan->gain_dsp = 0x6e; /* Default level */
2725 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2726 chan->active = htole16(10);
2727 chan->passive = htole16(110);
2728 chan->gain_radio = 0x3b;
2729 } else {
2730 chan->active = htole16(20);
2731 chan->passive = htole16(120);
2732 chan->gain_radio = 0x28;
2733 }
2734
2735 DPRINTFN(WPI_DEBUG_SCANNING,
2736 ("Scanning %u Passive: %d\n",
2737 chan->chan,
2738 c->ic_flags & IEEE80211_CHAN_PASSIVE));
2739
2740 hdr->nchan++;
2741 chan++;
2742
2743 frm += sizeof (struct wpi_scan_chan);
2744 }
2745 #endif
2746
2747 hdr->len = htole16(frm - (uint8_t *)hdr);
2748 pktlen = frm - (uint8_t *)cmd;
2749
2750 error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen,
2751 wpi_dma_map_addr, &physaddr, BUS_DMA_NOWAIT);
2752 if (error != 0) {
2753 device_printf(sc->sc_dev, "could not map scan command\n");
2754 m_freem(data->m);
2755 data->m = NULL;
2756 return error;
2757 }
2758
2759 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24);
2760 desc->segs[0].addr = htole32(physaddr);
2761 desc->segs[0].len = htole32(pktlen);
2762
2763 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
2764 BUS_DMASYNC_PREWRITE);
2765 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
2766
2767 /* kick cmd ring */
2768 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2769 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2770
2771 sc->sc_scan_timer = 5;
2772 return 0; /* will be notified async. of failure/success */
2773 }
2774
2775 /**
2776 * Configure the card to listen to a particular channel, this transisions the
2777 * card in to being able to receive frames from remote devices.
2778 */
2779 static int
2780 wpi_config(struct wpi_softc *sc)
2781 {
2782 struct ifnet *ifp = sc->sc_ifp;
2783 struct ieee80211com *ic = ifp->if_l2com;
2784 struct wpi_power power;
2785 struct wpi_bluetooth bluetooth;
2786 struct wpi_node_info node;
2787 int error;
2788
2789 /* set power mode */
2790 memset(&power, 0, sizeof power);
2791 power.flags = htole32(WPI_POWER_CAM|0x8);
2792 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0);
2793 if (error != 0) {
2794 device_printf(sc->sc_dev, "could not set power mode\n");
2795 return error;
2796 }
2797
2798 /* configure bluetooth coexistence */
2799 memset(&bluetooth, 0, sizeof bluetooth);
2800 bluetooth.flags = 3;
2801 bluetooth.lead = 0xaa;
2802 bluetooth.kill = 1;
2803 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth,
2804 0);
2805 if (error != 0) {
2806 device_printf(sc->sc_dev,
2807 "could not configure bluetooth coexistence\n");
2808 return error;
2809 }
2810
2811 /* configure adapter */
2812 memset(&sc->config, 0, sizeof (struct wpi_config));
2813 IEEE80211_ADDR_COPY(sc->config.myaddr, IF_LLADDR(ifp));
2814 /*set default channel*/
2815 sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan));
2816 sc->config.flags = htole32(WPI_CONFIG_TSF);
2817 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2818 sc->config.flags |= htole32(WPI_CONFIG_AUTO |
2819 WPI_CONFIG_24GHZ);
2820 }
2821 sc->config.filter = 0;
2822 switch (ic->ic_opmode) {
2823 case IEEE80211_M_STA:
2824 case IEEE80211_M_WDS: /* No know setup, use STA for now */
2825 sc->config.mode = WPI_MODE_STA;
2826 sc->config.filter |= htole32(WPI_FILTER_MULTICAST);
2827 break;
2828 case IEEE80211_M_IBSS:
2829 case IEEE80211_M_AHDEMO:
2830 sc->config.mode = WPI_MODE_IBSS;
2831 sc->config.filter |= htole32(WPI_FILTER_BEACON |
2832 WPI_FILTER_MULTICAST);
2833 break;
2834 case IEEE80211_M_HOSTAP:
2835 sc->config.mode = WPI_MODE_HOSTAP;
2836 break;
2837 case IEEE80211_M_MONITOR:
2838 sc->config.mode = WPI_MODE_MONITOR;
2839 sc->config.filter |= htole32(WPI_FILTER_MULTICAST |
2840 WPI_FILTER_CTL | WPI_FILTER_PROMISC);
2841 break;
2842 default:
2843 device_printf(sc->sc_dev, "unknown opmode %d\n", ic->ic_opmode);
2844 return EINVAL;
2845 }
2846 sc->config.cck_mask = 0x0f; /* not yet negotiated */
2847 sc->config.ofdm_mask = 0xff; /* not yet negotiated */
2848 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
2849 sizeof (struct wpi_config), 0);
2850 if (error != 0) {
2851 device_printf(sc->sc_dev, "configure command failed\n");
2852 return error;
2853 }
2854
2855 /* configuration has changed, set Tx power accordingly */
2856 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) {
2857 device_printf(sc->sc_dev, "could not set Tx power\n");
2858 return error;
2859 }
2860
2861 /* add broadcast node */
2862 memset(&node, 0, sizeof node);
2863 IEEE80211_ADDR_COPY(node.bssid, ifp->if_broadcastaddr);
2864 node.id = WPI_ID_BROADCAST;
2865 node.rate = wpi_plcp_signal(2);
2866 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0);
2867 if (error != 0) {
2868 device_printf(sc->sc_dev, "could not add broadcast node\n");
2869 return error;
2870 }
2871
2872 /* Setup rate scalling */
2873 error = wpi_mrr_setup(sc);
2874 if (error != 0) {
2875 device_printf(sc->sc_dev, "could not setup MRR\n");
2876 return error;
2877 }
2878
2879 return 0;
2880 }
2881
2882 static void
2883 wpi_stop_master(struct wpi_softc *sc)
2884 {
2885 uint32_t tmp;
2886 int ntries;
2887
2888 DPRINTFN(WPI_DEBUG_HW,("Disabling Firmware execution\n"));
2889
2890 tmp = WPI_READ(sc, WPI_RESET);
2891 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER | WPI_NEVO_RESET);
2892
2893 tmp = WPI_READ(sc, WPI_GPIO_CTL);
2894 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP)
2895 return; /* already asleep */
2896
2897 for (ntries = 0; ntries < 100; ntries++) {
2898 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED)
2899 break;
2900 DELAY(10);
2901 }
2902 if (ntries == 100) {
2903 device_printf(sc->sc_dev, "timeout waiting for master\n");
2904 }
2905 }
2906
2907 static int
2908 wpi_power_up(struct wpi_softc *sc)
2909 {
2910 uint32_t tmp;
2911 int ntries;
2912
2913 wpi_mem_lock(sc);
2914 tmp = wpi_mem_read(sc, WPI_MEM_POWER);
2915 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000);
2916 wpi_mem_unlock(sc);
2917
2918 for (ntries = 0; ntries < 5000; ntries++) {
2919 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED)
2920 break;
2921 DELAY(10);
2922 }
2923 if (ntries == 5000) {
2924 device_printf(sc->sc_dev,
2925 "timeout waiting for NIC to power up\n");
2926 return ETIMEDOUT;
2927 }
2928 return 0;
2929 }
2930
2931 static int
2932 wpi_reset(struct wpi_softc *sc)
2933 {
2934 uint32_t tmp;
2935 int ntries;
2936
2937 DPRINTFN(WPI_DEBUG_HW,
2938 ("Resetting the card - clearing any uploaded firmware\n"));
2939
2940 /* clear any pending interrupts */
2941 WPI_WRITE(sc, WPI_INTR, 0xffffffff);
2942
2943 tmp = WPI_READ(sc, WPI_PLL_CTL);
2944 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT);
2945
2946 tmp = WPI_READ(sc, WPI_CHICKEN);
2947 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS);
2948
2949 tmp = WPI_READ(sc, WPI_GPIO_CTL);
2950 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT);
2951
2952 /* wait for clock stabilization */
2953 for (ntries = 0; ntries < 25000; ntries++) {
2954 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK)
2955 break;
2956 DELAY(10);
2957 }
2958 if (ntries == 25000) {
2959 device_printf(sc->sc_dev,
2960 "timeout waiting for clock stabilization\n");
2961 return ETIMEDOUT;
2962 }
2963
2964 /* initialize EEPROM */
2965 tmp = WPI_READ(sc, WPI_EEPROM_STATUS);
2966
2967 if ((tmp & WPI_EEPROM_VERSION) == 0) {
2968 device_printf(sc->sc_dev, "EEPROM not found\n");
2969 return EIO;
2970 }
2971 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED);
2972
2973 return 0;
2974 }
2975
2976 static void
2977 wpi_hw_config(struct wpi_softc *sc)
2978 {
2979 uint32_t rev, hw;
2980
2981 /* voodoo from the Linux "driver".. */
2982 hw = WPI_READ(sc, WPI_HWCONFIG);
2983
2984 rev = pci_read_config(sc->sc_dev, PCIR_REVID, 1);
2985 if ((rev & 0xc0) == 0x40)
2986 hw |= WPI_HW_ALM_MB;
2987 else if (!(rev & 0x80))
2988 hw |= WPI_HW_ALM_MM;
2989
2990 if (sc->cap == 0x80)
2991 hw |= WPI_HW_SKU_MRC;
2992
2993 hw &= ~WPI_HW_REV_D;
2994 if ((le16toh(sc->rev) & 0xf0) == 0xd0)
2995 hw |= WPI_HW_REV_D;
2996
2997 if (sc->type > 1)
2998 hw |= WPI_HW_TYPE_B;
2999
3000 WPI_WRITE(sc, WPI_HWCONFIG, hw);
3001 }
3002
3003 static void
3004 wpi_rfkill_resume(struct wpi_softc *sc)
3005 {
3006 struct ifnet *ifp = sc->sc_ifp;
3007 struct ieee80211com *ic = ifp->if_l2com;
3008 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3009 int ntries;
3010
3011 /* enable firmware again */
3012 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3013 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD);
3014
3015 /* wait for thermal sensors to calibrate */
3016 for (ntries = 0; ntries < 1000; ntries++) {
3017 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0)
3018 break;
3019 DELAY(10);
3020 }
3021
3022 if (ntries == 1000) {
3023 device_printf(sc->sc_dev,
3024 "timeout waiting for thermal calibration\n");
3025 return;
3026 }
3027 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp));
3028
3029 if (wpi_config(sc) != 0) {
3030 device_printf(sc->sc_dev, "device config failed\n");
3031 return;
3032 }
3033
3034 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3035 ifp->if_drv_flags |= IFF_DRV_RUNNING;
3036 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF;
3037
3038 if (vap != NULL) {
3039 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
3040 if (vap->iv_opmode != IEEE80211_M_MONITOR) {
3041 ieee80211_beacon_miss(ic);
3042 wpi_set_led(sc, WPI_LED_LINK, 0, 1);
3043 } else
3044 wpi_set_led(sc, WPI_LED_LINK, 5, 5);
3045 } else {
3046 ieee80211_scan_next(vap);
3047 wpi_set_led(sc, WPI_LED_LINK, 20, 2);
3048 }
3049 }
3050
3051 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3052 }
3053
3054 static void
3055 wpi_init_locked(struct wpi_softc *sc, int force)
3056 {
3057 struct ifnet *ifp = sc->sc_ifp;
3058 uint32_t tmp;
3059 int ntries, qid;
3060
3061 wpi_stop_locked(sc);
3062 (void)wpi_reset(sc);
3063
3064 wpi_mem_lock(sc);
3065 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00);
3066 DELAY(20);
3067 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV);
3068 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800);
3069 wpi_mem_unlock(sc);
3070
3071 (void)wpi_power_up(sc);
3072 wpi_hw_config(sc);
3073
3074 /* init Rx ring */
3075 wpi_mem_lock(sc);
3076 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr);
3077 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr +
3078 offsetof(struct wpi_shared, next));
3079 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7);
3080 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010);
3081 wpi_mem_unlock(sc);
3082
3083 /* init Tx rings */
3084 wpi_mem_lock(sc);
3085 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */
3086 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */
3087 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */
3088 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000);
3089 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002);
3090 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4);
3091 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5);
3092
3093 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr);
3094 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5);
3095
3096 for (qid = 0; qid < 6; qid++) {
3097 WPI_WRITE(sc, WPI_TX_CTL(qid), 0);
3098 WPI_WRITE(sc, WPI_TX_BASE(qid), 0);
3099 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008);
3100 }
3101 wpi_mem_unlock(sc);
3102
3103 /* clear "radio off" and "disable command" bits (reversed logic) */
3104 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3105 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD);
3106 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF;
3107
3108 /* clear any pending interrupts */
3109 WPI_WRITE(sc, WPI_INTR, 0xffffffff);
3110
3111 /* enable interrupts */
3112 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK);
3113
3114 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3115 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3116
3117 if ((wpi_load_firmware(sc)) != 0) {
3118 device_printf(sc->sc_dev,
3119 "A problem occurred loading the firmware to the driver\n");
3120 return;
3121 }
3122
3123 /* At this point the firmware is up and running. If the hardware
3124 * RF switch is turned off thermal calibration will fail, though
3125 * the card is still happy to continue to accept commands, catch
3126 * this case and schedule a task to watch for it to be turned on.
3127 */
3128 wpi_mem_lock(sc);
3129 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF);
3130 wpi_mem_unlock(sc);
3131
3132 if (!(tmp & 0x1)) {
3133 sc->flags |= WPI_FLAG_HW_RADIO_OFF;
3134 device_printf(sc->sc_dev,"Radio Transmitter is switched off\n");
3135 goto out;
3136 }
3137
3138 /* wait for thermal sensors to calibrate */
3139 for (ntries = 0; ntries < 1000; ntries++) {
3140 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0)
3141 break;
3142 DELAY(10);
3143 }
3144
3145 if (ntries == 1000) {
3146 device_printf(sc->sc_dev,
3147 "timeout waiting for thermal sensors calibration\n");
3148 return;
3149 }
3150 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp));
3151
3152 if (wpi_config(sc) != 0) {
3153 device_printf(sc->sc_dev, "device config failed\n");
3154 return;
3155 }
3156
3157 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3158 ifp->if_drv_flags |= IFF_DRV_RUNNING;
3159 out:
3160 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3161 }
3162
3163 static void
3164 wpi_init(void *arg)
3165 {
3166 struct wpi_softc *sc = arg;
3167 struct ifnet *ifp = sc->sc_ifp;
3168 struct ieee80211com *ic = ifp->if_l2com;
3169
3170 WPI_LOCK(sc);
3171 wpi_init_locked(sc, 0);
3172 WPI_UNLOCK(sc);
3173
3174 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3175 ieee80211_start_all(ic); /* start all vaps */
3176 }
3177
3178 static void
3179 wpi_stop_locked(struct wpi_softc *sc)
3180 {
3181 struct ifnet *ifp = sc->sc_ifp;
3182 uint32_t tmp;
3183 int ac;
3184
3185 sc->sc_tx_timer = 0;
3186 sc->sc_scan_timer = 0;
3187 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
3188 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF;
3189 callout_stop(&sc->watchdog_to);
3190 callout_stop(&sc->calib_to);
3191
3192
3193 /* disable interrupts */
3194 WPI_WRITE(sc, WPI_MASK, 0);
3195 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK);
3196 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff);
3197 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000);
3198
3199 wpi_mem_lock(sc);
3200 wpi_mem_write(sc, WPI_MEM_MODE, 0);
3201 wpi_mem_unlock(sc);
3202
3203 /* reset all Tx rings */
3204 for (ac = 0; ac < 4; ac++)
3205 wpi_reset_tx_ring(sc, &sc->txq[ac]);
3206 wpi_reset_tx_ring(sc, &sc->cmdq);
3207
3208 /* reset Rx ring */
3209 wpi_reset_rx_ring(sc, &sc->rxq);
3210
3211 wpi_mem_lock(sc);
3212 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200);
3213 wpi_mem_unlock(sc);
3214
3215 DELAY(5);
3216
3217 wpi_stop_master(sc);
3218
3219 tmp = WPI_READ(sc, WPI_RESET);
3220 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET);
3221 sc->flags &= ~WPI_FLAG_BUSY;
3222 }
3223
3224 static void
3225 wpi_stop(struct wpi_softc *sc)
3226 {
3227 WPI_LOCK(sc);
3228 wpi_stop_locked(sc);
3229 WPI_UNLOCK(sc);
3230 }
3231
3232 static void
3233 wpi_calib_timeout(void *arg)
3234 {
3235 struct wpi_softc *sc = arg;
3236 struct ifnet *ifp = sc->sc_ifp;
3237 struct ieee80211com *ic = ifp->if_l2com;
3238 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3239 int temp;
3240
3241 if (vap->iv_state != IEEE80211_S_RUN)
3242 return;
3243
3244 /* update sensor data */
3245 temp = (int)WPI_READ(sc, WPI_TEMPERATURE);
3246 DPRINTFN(WPI_DEBUG_TEMP,("Temp in calibration is: %d\n", temp));
3247
3248 wpi_power_calibration(sc, temp);
3249
3250 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc);
3251 }
3252
3253 /*
3254 * This function is called periodically (every 60 seconds) to adjust output
3255 * power to temperature changes.
3256 */
3257 static void
3258 wpi_power_calibration(struct wpi_softc *sc, int temp)
3259 {
3260 struct ifnet *ifp = sc->sc_ifp;
3261 struct ieee80211com *ic = ifp->if_l2com;
3262 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3263
3264 /* sanity-check read value */
3265 if (temp < -260 || temp > 25) {
3266 /* this can't be correct, ignore */
3267 DPRINTFN(WPI_DEBUG_TEMP,
3268 ("out-of-range temperature reported: %d\n", temp));
3269 return;
3270 }
3271
3272 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d->%d\n", sc->temp, temp));
3273
3274 /* adjust Tx power if need be */
3275 if (abs(temp - sc->temp) <= 6)
3276 return;
3277
3278 sc->temp = temp;
3279
3280 if (wpi_set_txpower(sc, vap->iv_bss->ni_chan, 1) != 0) {
3281 /* just warn, too bad for the automatic calibration... */
3282 device_printf(sc->sc_dev,"could not adjust Tx power\n");
3283 }
3284 }
3285
3286 /**
3287 * Read the eeprom to find out what channels are valid for the given
3288 * band and update net80211 with what we find.
3289 */
3290 static void
3291 wpi_read_eeprom_channels(struct wpi_softc *sc, int n)
3292 {
3293 struct ifnet *ifp = sc->sc_ifp;
3294 struct ieee80211com *ic = ifp->if_l2com;
3295 const struct wpi_chan_band *band = &wpi_bands[n];
3296 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND];
3297 struct ieee80211_channel *c;
3298 int chan, i, passive;
3299
3300 wpi_read_prom_data(sc, band->addr, channels,
3301 band->nchan * sizeof (struct wpi_eeprom_chan));
3302
3303 for (i = 0; i < band->nchan; i++) {
3304 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) {
3305 DPRINTFN(WPI_DEBUG_HW,
3306 ("Channel Not Valid: %d, band %d\n",
3307 band->chan[i],n));
3308 continue;
3309 }
3310
3311 passive = 0;
3312 chan = band->chan[i];
3313 c = &ic->ic_channels[ic->ic_nchans++];
3314
3315 /* is active scan allowed on this channel? */
3316 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) {
3317 passive = IEEE80211_CHAN_PASSIVE;
3318 }
3319
3320 if (n == 0) { /* 2GHz band */
3321 c->ic_ieee = chan;
3322 c->ic_freq = ieee80211_ieee2mhz(chan,
3323 IEEE80211_CHAN_2GHZ);
3324 c->ic_flags = IEEE80211_CHAN_B | passive;
3325
3326 c = &ic->ic_channels[ic->ic_nchans++];
3327 c->ic_ieee = chan;
3328 c->ic_freq = ieee80211_ieee2mhz(chan,
3329 IEEE80211_CHAN_2GHZ);
3330 c->ic_flags = IEEE80211_CHAN_G | passive;
3331
3332 } else { /* 5GHz band */
3333 /*
3334 * Some 3945ABG adapters support channels 7, 8, 11
3335 * and 12 in the 2GHz *and* 5GHz bands.
3336 * Because of limitations in our net80211(9) stack,
3337 * we can't support these channels in 5GHz band.
3338 * XXX not true; just need to map to proper frequency
3339 */
3340 if (chan <= 14)
3341 continue;
3342
3343 c->ic_ieee = chan;
3344 c->ic_freq = ieee80211_ieee2mhz(chan,
3345 IEEE80211_CHAN_5GHZ);
3346 c->ic_flags = IEEE80211_CHAN_A | passive;
3347 }
3348
3349 /* save maximum allowed power for this channel */
3350 sc->maxpwr[chan] = channels[i].maxpwr;
3351
3352 #if 0
3353 // XXX We can probably use this an get rid of maxpwr - ben 20070617
3354 ic->ic_channels[chan].ic_maxpower = channels[i].maxpwr;
3355 //ic->ic_channels[chan].ic_minpower...
3356 //ic->ic_channels[chan].ic_maxregtxpower...
3357 #endif
3358
3359 DPRINTF(("adding chan %d (%dMHz) flags=0x%x maxpwr=%d"
3360 " passive=%d, offset %d\n", chan, c->ic_freq,
3361 channels[i].flags, sc->maxpwr[chan],
3362 (c->ic_flags & IEEE80211_CHAN_PASSIVE) != 0,
3363 ic->ic_nchans));
3364 }
3365 }
3366
3367 static void
3368 wpi_read_eeprom_group(struct wpi_softc *sc, int n)
3369 {
3370 struct wpi_power_group *group = &sc->groups[n];
3371 struct wpi_eeprom_group rgroup;
3372 int i;
3373
3374 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup,
3375 sizeof rgroup);
3376
3377 /* save power group information */
3378 group->chan = rgroup.chan;
3379 group->maxpwr = rgroup.maxpwr;
3380 /* temperature at which the samples were taken */
3381 group->temp = (int16_t)le16toh(rgroup.temp);
3382
3383 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n,
3384 group->chan, group->maxpwr, group->temp));
3385
3386 for (i = 0; i < WPI_SAMPLES_COUNT; i++) {
3387 group->samples[i].index = rgroup.samples[i].index;
3388 group->samples[i].power = rgroup.samples[i].power;
3389
3390 DPRINTF(("\tsample %d: index=%d power=%d\n", i,
3391 group->samples[i].index, group->samples[i].power));
3392 }
3393 }
3394
3395 /*
3396 * Update Tx power to match what is defined for channel `c'.
3397 */
3398 static int
3399 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async)
3400 {
3401 struct ifnet *ifp = sc->sc_ifp;
3402 struct ieee80211com *ic = ifp->if_l2com;
3403 struct wpi_power_group *group;
3404 struct wpi_cmd_txpower txpower;
3405 u_int chan;
3406 int i;
3407
3408 /* get channel number */
3409 chan = ieee80211_chan2ieee(ic, c);
3410
3411 /* find the power group to which this channel belongs */
3412 if (IEEE80211_IS_CHAN_5GHZ(c)) {
3413 for (group = &sc->groups[1]; group < &sc->groups[4]; group++)
3414 if (chan <= group->chan)
3415 break;
3416 } else
3417 group = &sc->groups[0];
3418
3419 memset(&txpower, 0, sizeof txpower);
3420 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1;
3421 txpower.channel = htole16(chan);
3422
3423 /* set Tx power for all OFDM and CCK rates */
3424 for (i = 0; i <= 11 ; i++) {
3425 /* retrieve Tx power for this channel/rate combination */
3426 int idx = wpi_get_power_index(sc, group, c,
3427 wpi_ridx_to_rate[i]);
3428
3429 txpower.rates[i].rate = wpi_ridx_to_plcp[i];
3430
3431 if (IEEE80211_IS_CHAN_5GHZ(c)) {
3432 txpower.rates[i].gain_radio = wpi_rf_gain_5ghz[idx];
3433 txpower.rates[i].gain_dsp = wpi_dsp_gain_5ghz[idx];
3434 } else {
3435 txpower.rates[i].gain_radio = wpi_rf_gain_2ghz[idx];
3436 txpower.rates[i].gain_dsp = wpi_dsp_gain_2ghz[idx];
3437 }
3438 DPRINTFN(WPI_DEBUG_TEMP,("chan %d/rate %d: power index %d\n",
3439 chan, wpi_ridx_to_rate[i], idx));
3440 }
3441
3442 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async);
3443 }
3444
3445 /*
3446 * Determine Tx power index for a given channel/rate combination.
3447 * This takes into account the regulatory information from EEPROM and the
3448 * current temperature.
3449 */
3450 static int
3451 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group,
3452 struct ieee80211_channel *c, int rate)
3453 {
3454 /* fixed-point arithmetic division using a n-bit fractional part */
3455 #define fdivround(a, b, n) \
3456 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n))
3457
3458 /* linear interpolation */
3459 #define interpolate(x, x1, y1, x2, y2, n) \
3460 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n))
3461
3462 struct ifnet *ifp = sc->sc_ifp;
3463 struct ieee80211com *ic = ifp->if_l2com;
3464 struct wpi_power_sample *sample;
3465 int pwr, idx;
3466 u_int chan;
3467
3468 /* get channel number */
3469 chan = ieee80211_chan2ieee(ic, c);
3470
3471 /* default power is group's maximum power - 3dB */
3472 pwr = group->maxpwr / 2;
3473
3474 /* decrease power for highest OFDM rates to reduce distortion */
3475 switch (rate) {
3476 case 72: /* 36Mb/s */
3477 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5;
3478 break;
3479 case 96: /* 48Mb/s */
3480 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10;
3481 break;
3482 case 108: /* 54Mb/s */
3483 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12;
3484 break;
3485 }
3486
3487 /* never exceed channel's maximum allowed Tx power */
3488 pwr = min(pwr, sc->maxpwr[chan]);
3489
3490 /* retrieve power index into gain tables from samples */
3491 for (sample = group->samples; sample < &group->samples[3]; sample++)
3492 if (pwr > sample[1].power)
3493 break;
3494 /* fixed-point linear interpolation using a 19-bit fractional part */
3495 idx = interpolate(pwr, sample[0].power, sample[0].index,
3496 sample[1].power, sample[1].index, 19);
3497
3498 /*
3499 * Adjust power index based on current temperature
3500 * - if colder than factory-calibrated: decreate output power
3501 * - if warmer than factory-calibrated: increase output power
3502 */
3503 idx -= (sc->temp - group->temp) * 11 / 100;
3504
3505 /* decrease power for CCK rates (-5dB) */
3506 if (!WPI_RATE_IS_OFDM(rate))
3507 idx += 10;
3508
3509 /* keep power index in a valid range */
3510 if (idx < 0)
3511 return 0;
3512 if (idx > WPI_MAX_PWR_INDEX)
3513 return WPI_MAX_PWR_INDEX;
3514 return idx;
3515
3516 #undef interpolate
3517 #undef fdivround
3518 }
3519
3520 /**
3521 * Called by net80211 framework to indicate that a scan
3522 * is starting. This function doesn't actually do the scan,
3523 * wpi_scan_curchan starts things off. This function is more
3524 * of an early warning from the framework we should get ready
3525 * for the scan.
3526 */
3527 static void
3528 wpi_scan_start(struct ieee80211com *ic)
3529 {
3530 struct ifnet *ifp = ic->ic_ifp;
3531 struct wpi_softc *sc = ifp->if_softc;
3532
3533 WPI_LOCK(sc);
3534 wpi_set_led(sc, WPI_LED_LINK, 20, 2);
3535 WPI_UNLOCK(sc);
3536 }
3537
3538 /**
3539 * Called by the net80211 framework, indicates that the
3540 * scan has ended. If there is a scan in progress on the card
3541 * then it should be aborted.
3542 */
3543 static void
3544 wpi_scan_end(struct ieee80211com *ic)
3545 {
3546 /* XXX ignore */
3547 }
3548
3549 /**
3550 * Called by the net80211 framework to indicate to the driver
3551 * that the channel should be changed
3552 */
3553 static void
3554 wpi_set_channel(struct ieee80211com *ic)
3555 {
3556 struct ifnet *ifp = ic->ic_ifp;
3557 struct wpi_softc *sc = ifp->if_softc;
3558 int error;
3559
3560 /*
3561 * Only need to set the channel in Monitor mode. AP scanning and auth
3562 * are already taken care of by their respective firmware commands.
3563 */
3564 if (ic->ic_opmode == IEEE80211_M_MONITOR) {
3565 WPI_LOCK(sc);
3566 error = wpi_config(sc);
3567 WPI_UNLOCK(sc);
3568 if (error != 0)
3569 device_printf(sc->sc_dev,
3570 "error %d settting channel\n", error);
3571 }
3572 }
3573
3574 /**
3575 * Called by net80211 to indicate that we need to scan the current
3576 * channel. The channel is previously be set via the wpi_set_channel
3577 * callback.
3578 */
3579 static void
3580 wpi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3581 {
3582 struct ieee80211vap *vap = ss->ss_vap;
3583 struct ifnet *ifp = vap->iv_ic->ic_ifp;
3584 struct wpi_softc *sc = ifp->if_softc;
3585
3586 WPI_LOCK(sc);
3587 if (wpi_scan(sc))
3588 ieee80211_cancel_scan(vap);
3589 WPI_UNLOCK(sc);
3590 }
3591
3592 /**
3593 * Called by the net80211 framework to indicate
3594 * the minimum dwell time has been met, terminate the scan.
3595 * We don't actually terminate the scan as the firmware will notify
3596 * us when it's finished and we have no way to interrupt it.
3597 */
3598 static void
3599 wpi_scan_mindwell(struct ieee80211_scan_state *ss)
3600 {
3601 /* NB: don't try to abort scan; wait for firmware to finish */
3602 }
3603
3604 static void
3605 wpi_hwreset(void *arg, int pending)
3606 {
3607 struct wpi_softc *sc = arg;
3608
3609 WPI_LOCK(sc);
3610 wpi_init_locked(sc, 0);
3611 WPI_UNLOCK(sc);
3612 }
3613
3614 static void
3615 wpi_rfreset(void *arg, int pending)
3616 {
3617 struct wpi_softc *sc = arg;
3618
3619 WPI_LOCK(sc);
3620 wpi_rfkill_resume(sc);
3621 WPI_UNLOCK(sc);
3622 }
3623
3624 /*
3625 * Allocate DMA-safe memory for firmware transfer.
3626 */
3627 static int
3628 wpi_alloc_fwmem(struct wpi_softc *sc)
3629 {
3630 /* allocate enough contiguous space to store text and data */
3631 return wpi_dma_contig_alloc(sc, &sc->fw_dma, NULL,
3632 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 1,
3633 BUS_DMA_NOWAIT);
3634 }
3635
3636 static void
3637 wpi_free_fwmem(struct wpi_softc *sc)
3638 {
3639 wpi_dma_contig_free(&sc->fw_dma);
3640 }
3641
3642 /**
3643 * Called every second, wpi_watchdog used by the watch dog timer
3644 * to check that the card is still alive
3645 */
3646 static void
3647 wpi_watchdog(void *arg)
3648 {
3649 struct wpi_softc *sc = arg;
3650 struct ifnet *ifp = sc->sc_ifp;
3651 struct ieee80211com *ic = ifp->if_l2com;
3652 uint32_t tmp;
3653
3654 DPRINTFN(WPI_DEBUG_WATCHDOG,("Watchdog: tick\n"));
3655
3656 if (sc->flags & WPI_FLAG_HW_RADIO_OFF) {
3657 /* No need to lock firmware memory */
3658 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF);
3659
3660 if ((tmp & 0x1) == 0) {
3661 /* Radio kill switch is still off */
3662 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3663 return;
3664 }
3665
3666 device_printf(sc->sc_dev, "Hardware Switch Enabled\n");
3667 ieee80211_runtask(ic, &sc->sc_radiotask);
3668 return;
3669 }
3670
3671 if (sc->sc_tx_timer > 0) {
3672 if (--sc->sc_tx_timer == 0) {
3673 device_printf(sc->sc_dev,"device timeout\n");
3674 ifp->if_oerrors++;
3675 ieee80211_runtask(ic, &sc->sc_restarttask);
3676 }
3677 }
3678 if (sc->sc_scan_timer > 0) {
3679 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3680 if (--sc->sc_scan_timer == 0 && vap != NULL) {
3681 device_printf(sc->sc_dev,"scan timeout\n");
3682 ieee80211_cancel_scan(vap);
3683 ieee80211_runtask(ic, &sc->sc_restarttask);
3684 }
3685 }
3686
3687 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3688 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3689 }
3690
3691 #ifdef WPI_DEBUG
3692 static const char *wpi_cmd_str(int cmd)
3693 {
3694 switch (cmd) {
3695 case WPI_DISABLE_CMD: return "WPI_DISABLE_CMD";
3696 case WPI_CMD_CONFIGURE: return "WPI_CMD_CONFIGURE";
3697 case WPI_CMD_ASSOCIATE: return "WPI_CMD_ASSOCIATE";
3698 case WPI_CMD_SET_WME: return "WPI_CMD_SET_WME";
3699 case WPI_CMD_TSF: return "WPI_CMD_TSF";
3700 case WPI_CMD_ADD_NODE: return "WPI_CMD_ADD_NODE";
3701 case WPI_CMD_TX_DATA: return "WPI_CMD_TX_DATA";
3702 case WPI_CMD_MRR_SETUP: return "WPI_CMD_MRR_SETUP";
3703 case WPI_CMD_SET_LED: return "WPI_CMD_SET_LED";
3704 case WPI_CMD_SET_POWER_MODE: return "WPI_CMD_SET_POWER_MODE";
3705 case WPI_CMD_SCAN: return "WPI_CMD_SCAN";
3706 case WPI_CMD_SET_BEACON:return "WPI_CMD_SET_BEACON";
3707 case WPI_CMD_TXPOWER: return "WPI_CMD_TXPOWER";
3708 case WPI_CMD_BLUETOOTH: return "WPI_CMD_BLUETOOTH";
3709
3710 default:
3711 KASSERT(1, ("Unknown Command: %d\n", cmd));
3712 return "UNKNOWN CMD"; /* Make the compiler happy */
3713 }
3714 }
3715 #endif
3716
3717 MODULE_DEPEND(wpi, pci, 1, 1, 1);
3718 MODULE_DEPEND(wpi, wlan, 1, 1, 1);
3719 MODULE_DEPEND(wpi, firmware, 1, 1, 1);
Cache object: ce8ba78668b4ca6ce479d5a5612dfb1c
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