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: stable/9/sys/dev/wpi/if_wpi.c 264955 2014-04-25 22:23:26Z 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 static device_method_t wpi_methods[] = {
254 /* Device interface */
255 DEVMETHOD(device_probe, wpi_probe),
256 DEVMETHOD(device_attach, wpi_attach),
257 DEVMETHOD(device_detach, wpi_detach),
258 DEVMETHOD(device_shutdown, wpi_shutdown),
259 DEVMETHOD(device_suspend, wpi_suspend),
260 DEVMETHOD(device_resume, wpi_resume),
261
262 DEVMETHOD_END
263 };
264
265 static driver_t wpi_driver = {
266 "wpi",
267 wpi_methods,
268 sizeof (struct wpi_softc)
269 };
270
271 static devclass_t wpi_devclass;
272
273 DRIVER_MODULE(wpi, pci, wpi_driver, wpi_devclass, NULL, NULL);
274
275 MODULE_VERSION(wpi, 1);
276
277 static const uint8_t wpi_ridx_to_plcp[] = {
278 /* OFDM: IEEE Std 802.11a-1999, pp. 14 Table 80 */
279 /* R1-R4 (ral/ural is R4-R1) */
280 0xd, 0xf, 0x5, 0x7, 0x9, 0xb, 0x1, 0x3,
281 /* CCK: device-dependent */
282 10, 20, 55, 110
283 };
284
285 static const uint8_t wpi_ridx_to_rate[] = {
286 12, 18, 24, 36, 48, 72, 96, 108, /* OFDM */
287 2, 4, 11, 22 /*CCK */
288 };
289
290 static int
wpi_probe(device_t dev)291 wpi_probe(device_t dev)
292 {
293 const struct wpi_ident *ident;
294
295 for (ident = wpi_ident_table; ident->name != NULL; ident++) {
296 if (pci_get_vendor(dev) == ident->vendor &&
297 pci_get_device(dev) == ident->device) {
298 device_set_desc(dev, ident->name);
299 return (BUS_PROBE_DEFAULT);
300 }
301 }
302 return ENXIO;
303 }
304
305 /**
306 * Load the firmare image from disk to the allocated dma buffer.
307 * we also maintain the reference to the firmware pointer as there
308 * is times where we may need to reload the firmware but we are not
309 * in a context that can access the filesystem (ie taskq cause by restart)
310 *
311 * @return 0 on success, an errno on failure
312 */
313 static int
wpi_load_firmware(struct wpi_softc * sc)314 wpi_load_firmware(struct wpi_softc *sc)
315 {
316 const struct firmware *fp;
317 struct wpi_dma_info *dma = &sc->fw_dma;
318 const struct wpi_firmware_hdr *hdr;
319 const uint8_t *itext, *idata, *rtext, *rdata, *btext;
320 uint32_t itextsz, idatasz, rtextsz, rdatasz, btextsz;
321 int error;
322
323 DPRINTFN(WPI_DEBUG_FIRMWARE,
324 ("Attempting Loading Firmware from wpi_fw module\n"));
325
326 WPI_UNLOCK(sc);
327
328 if (sc->fw_fp == NULL && (sc->fw_fp = firmware_get("wpifw")) == NULL) {
329 device_printf(sc->sc_dev,
330 "could not load firmware image 'wpifw'\n");
331 error = ENOENT;
332 WPI_LOCK(sc);
333 goto fail;
334 }
335
336 fp = sc->fw_fp;
337
338 WPI_LOCK(sc);
339
340 /* Validate the firmware is minimum a particular version */
341 if (fp->version < WPI_FW_MINVERSION) {
342 device_printf(sc->sc_dev,
343 "firmware version is too old. Need %d, got %d\n",
344 WPI_FW_MINVERSION,
345 fp->version);
346 error = ENXIO;
347 goto fail;
348 }
349
350 if (fp->datasize < sizeof (struct wpi_firmware_hdr)) {
351 device_printf(sc->sc_dev,
352 "firmware file too short: %zu bytes\n", fp->datasize);
353 error = ENXIO;
354 goto fail;
355 }
356
357 hdr = (const struct wpi_firmware_hdr *)fp->data;
358
359 /* | RUNTIME FIRMWARE | INIT FIRMWARE | BOOT FW |
360 |HDR|<--TEXT-->|<--DATA-->|<--TEXT-->|<--DATA-->|<--TEXT-->| */
361
362 rtextsz = le32toh(hdr->rtextsz);
363 rdatasz = le32toh(hdr->rdatasz);
364 itextsz = le32toh(hdr->itextsz);
365 idatasz = le32toh(hdr->idatasz);
366 btextsz = le32toh(hdr->btextsz);
367
368 /* check that all firmware segments are present */
369 if (fp->datasize < sizeof (struct wpi_firmware_hdr) +
370 rtextsz + rdatasz + itextsz + idatasz + btextsz) {
371 device_printf(sc->sc_dev,
372 "firmware file too short: %zu bytes\n", fp->datasize);
373 error = ENXIO; /* XXX appropriate error code? */
374 goto fail;
375 }
376
377 /* get pointers to firmware segments */
378 rtext = (const uint8_t *)(hdr + 1);
379 rdata = rtext + rtextsz;
380 itext = rdata + rdatasz;
381 idata = itext + itextsz;
382 btext = idata + idatasz;
383
384 DPRINTFN(WPI_DEBUG_FIRMWARE,
385 ("Firmware Version: Major %d, Minor %d, Driver %d, \n"
386 "runtime (text: %u, data: %u) init (text: %u, data %u) boot (text %u)\n",
387 (le32toh(hdr->version) & 0xff000000) >> 24,
388 (le32toh(hdr->version) & 0x00ff0000) >> 16,
389 (le32toh(hdr->version) & 0x0000ffff),
390 rtextsz, rdatasz,
391 itextsz, idatasz, btextsz));
392
393 DPRINTFN(WPI_DEBUG_FIRMWARE,("rtext 0x%x\n", *(const uint32_t *)rtext));
394 DPRINTFN(WPI_DEBUG_FIRMWARE,("rdata 0x%x\n", *(const uint32_t *)rdata));
395 DPRINTFN(WPI_DEBUG_FIRMWARE,("itext 0x%x\n", *(const uint32_t *)itext));
396 DPRINTFN(WPI_DEBUG_FIRMWARE,("idata 0x%x\n", *(const uint32_t *)idata));
397 DPRINTFN(WPI_DEBUG_FIRMWARE,("btext 0x%x\n", *(const uint32_t *)btext));
398
399 /* sanity checks */
400 if (rtextsz > WPI_FW_MAIN_TEXT_MAXSZ ||
401 rdatasz > WPI_FW_MAIN_DATA_MAXSZ ||
402 itextsz > WPI_FW_INIT_TEXT_MAXSZ ||
403 idatasz > WPI_FW_INIT_DATA_MAXSZ ||
404 btextsz > WPI_FW_BOOT_TEXT_MAXSZ ||
405 (btextsz & 3) != 0) {
406 device_printf(sc->sc_dev, "firmware invalid\n");
407 error = EINVAL;
408 goto fail;
409 }
410
411 /* copy initialization images into pre-allocated DMA-safe memory */
412 memcpy(dma->vaddr, idata, idatasz);
413 memcpy(dma->vaddr + WPI_FW_INIT_DATA_MAXSZ, itext, itextsz);
414
415 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE);
416
417 /* tell adapter where to find initialization images */
418 wpi_mem_lock(sc);
419 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr);
420 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, idatasz);
421 wpi_mem_write(sc, WPI_MEM_TEXT_BASE,
422 dma->paddr + WPI_FW_INIT_DATA_MAXSZ);
423 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, itextsz);
424 wpi_mem_unlock(sc);
425
426 /* load firmware boot code */
427 if ((error = wpi_load_microcode(sc, btext, btextsz)) != 0) {
428 device_printf(sc->sc_dev, "Failed to load microcode\n");
429 goto fail;
430 }
431
432 /* now press "execute" */
433 WPI_WRITE(sc, WPI_RESET, 0);
434
435 /* wait at most one second for the first alive notification */
436 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) {
437 device_printf(sc->sc_dev,
438 "timeout waiting for adapter to initialize\n");
439 goto fail;
440 }
441
442 /* copy runtime images into pre-allocated DMA-sage memory */
443 memcpy(dma->vaddr, rdata, rdatasz);
444 memcpy(dma->vaddr + WPI_FW_MAIN_DATA_MAXSZ, rtext, rtextsz);
445 bus_dmamap_sync(dma->tag, dma->map, BUS_DMASYNC_PREWRITE);
446
447 /* tell adapter where to find runtime images */
448 wpi_mem_lock(sc);
449 wpi_mem_write(sc, WPI_MEM_DATA_BASE, dma->paddr);
450 wpi_mem_write(sc, WPI_MEM_DATA_SIZE, rdatasz);
451 wpi_mem_write(sc, WPI_MEM_TEXT_BASE,
452 dma->paddr + WPI_FW_MAIN_DATA_MAXSZ);
453 wpi_mem_write(sc, WPI_MEM_TEXT_SIZE, WPI_FW_UPDATED | rtextsz);
454 wpi_mem_unlock(sc);
455
456 /* wait at most one second for the first alive notification */
457 if ((error = msleep(sc, &sc->sc_mtx, PCATCH, "wpiinit", hz)) != 0) {
458 device_printf(sc->sc_dev,
459 "timeout waiting for adapter to initialize2\n");
460 goto fail;
461 }
462
463 DPRINTFN(WPI_DEBUG_FIRMWARE,
464 ("Firmware loaded to driver successfully\n"));
465 return error;
466 fail:
467 wpi_unload_firmware(sc);
468 return error;
469 }
470
471 /**
472 * Free the referenced firmware image
473 */
474 static void
wpi_unload_firmware(struct wpi_softc * sc)475 wpi_unload_firmware(struct wpi_softc *sc)
476 {
477
478 if (sc->fw_fp) {
479 WPI_UNLOCK(sc);
480 firmware_put(sc->fw_fp, FIRMWARE_UNLOAD);
481 WPI_LOCK(sc);
482 sc->fw_fp = NULL;
483 }
484 }
485
486 static int
wpi_attach(device_t dev)487 wpi_attach(device_t dev)
488 {
489 struct wpi_softc *sc = device_get_softc(dev);
490 struct ifnet *ifp;
491 struct ieee80211com *ic;
492 int ac, error, rid, supportsa = 1;
493 uint32_t tmp;
494 const struct wpi_ident *ident;
495 uint8_t macaddr[IEEE80211_ADDR_LEN];
496
497 sc->sc_dev = dev;
498
499 if (bootverbose || WPI_DEBUG_SET)
500 device_printf(sc->sc_dev,"Driver Revision %s\n", VERSION);
501
502 /*
503 * Some card's only support 802.11b/g not a, check to see if
504 * this is one such card. A 0x0 in the subdevice table indicates
505 * the entire subdevice range is to be ignored.
506 */
507 for (ident = wpi_ident_table; ident->name != NULL; ident++) {
508 if (ident->subdevice &&
509 pci_get_subdevice(dev) == ident->subdevice) {
510 supportsa = 0;
511 break;
512 }
513 }
514
515 /* Create the tasks that can be queued */
516 TASK_INIT(&sc->sc_restarttask, 0, wpi_hwreset, sc);
517 TASK_INIT(&sc->sc_radiotask, 0, wpi_rfreset, sc);
518
519 WPI_LOCK_INIT(sc);
520
521 callout_init_mtx(&sc->calib_to, &sc->sc_mtx, 0);
522 callout_init_mtx(&sc->watchdog_to, &sc->sc_mtx, 0);
523
524 /* disable the retry timeout register */
525 pci_write_config(dev, 0x41, 0, 1);
526
527 /* enable bus-mastering */
528 pci_enable_busmaster(dev);
529
530 rid = PCIR_BAR(0);
531 sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
532 RF_ACTIVE);
533 if (sc->mem == NULL) {
534 device_printf(dev, "could not allocate memory resource\n");
535 error = ENOMEM;
536 goto fail;
537 }
538
539 sc->sc_st = rman_get_bustag(sc->mem);
540 sc->sc_sh = rman_get_bushandle(sc->mem);
541
542 rid = 0;
543 sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
544 RF_ACTIVE | RF_SHAREABLE);
545 if (sc->irq == NULL) {
546 device_printf(dev, "could not allocate interrupt resource\n");
547 error = ENOMEM;
548 goto fail;
549 }
550
551 /*
552 * Allocate DMA memory for firmware transfers.
553 */
554 if ((error = wpi_alloc_fwmem(sc)) != 0) {
555 printf(": could not allocate firmware memory\n");
556 error = ENOMEM;
557 goto fail;
558 }
559
560 /*
561 * Put adapter into a known state.
562 */
563 if ((error = wpi_reset(sc)) != 0) {
564 device_printf(dev, "could not reset adapter\n");
565 goto fail;
566 }
567
568 wpi_mem_lock(sc);
569 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV);
570 if (bootverbose || WPI_DEBUG_SET)
571 device_printf(sc->sc_dev, "Hardware Revision (0x%X)\n", tmp);
572
573 wpi_mem_unlock(sc);
574
575 /* Allocate shared page */
576 if ((error = wpi_alloc_shared(sc)) != 0) {
577 device_printf(dev, "could not allocate shared page\n");
578 goto fail;
579 }
580
581 /* tx data queues - 4 for QoS purposes */
582 for (ac = 0; ac < WME_NUM_AC; ac++) {
583 error = wpi_alloc_tx_ring(sc, &sc->txq[ac], WPI_TX_RING_COUNT, ac);
584 if (error != 0) {
585 device_printf(dev, "could not allocate Tx ring %d\n",ac);
586 goto fail;
587 }
588 }
589
590 /* command queue to talk to the card's firmware */
591 error = wpi_alloc_tx_ring(sc, &sc->cmdq, WPI_CMD_RING_COUNT, 4);
592 if (error != 0) {
593 device_printf(dev, "could not allocate command ring\n");
594 goto fail;
595 }
596
597 /* receive data queue */
598 error = wpi_alloc_rx_ring(sc, &sc->rxq);
599 if (error != 0) {
600 device_printf(dev, "could not allocate Rx ring\n");
601 goto fail;
602 }
603
604 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
605 if (ifp == NULL) {
606 device_printf(dev, "can not if_alloc()\n");
607 error = ENOMEM;
608 goto fail;
609 }
610 ic = ifp->if_l2com;
611
612 ic->ic_ifp = ifp;
613 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
614 ic->ic_opmode = IEEE80211_M_STA; /* default to BSS mode */
615
616 /* set device capabilities */
617 ic->ic_caps =
618 IEEE80211_C_STA /* station mode supported */
619 | IEEE80211_C_MONITOR /* monitor mode supported */
620 | IEEE80211_C_TXPMGT /* tx power management */
621 | IEEE80211_C_SHSLOT /* short slot time supported */
622 | IEEE80211_C_SHPREAMBLE /* short preamble supported */
623 | IEEE80211_C_WPA /* 802.11i */
624 /* XXX looks like WME is partly supported? */
625 #if 0
626 | IEEE80211_C_IBSS /* IBSS mode support */
627 | IEEE80211_C_BGSCAN /* capable of bg scanning */
628 | IEEE80211_C_WME /* 802.11e */
629 | IEEE80211_C_HOSTAP /* Host access point mode */
630 #endif
631 ;
632
633 /*
634 * Read in the eeprom and also setup the channels for
635 * net80211. We don't set the rates as net80211 does this for us
636 */
637 wpi_read_eeprom(sc, macaddr);
638
639 if (bootverbose || WPI_DEBUG_SET) {
640 device_printf(sc->sc_dev, "Regulatory Domain: %.4s\n", sc->domain);
641 device_printf(sc->sc_dev, "Hardware Type: %c\n",
642 sc->type > 1 ? 'B': '?');
643 device_printf(sc->sc_dev, "Hardware Revision: %c\n",
644 ((le16toh(sc->rev) & 0xf0) == 0xd0) ? 'D': '?');
645 device_printf(sc->sc_dev, "SKU %s support 802.11a\n",
646 supportsa ? "does" : "does not");
647
648 /* XXX hw_config uses the PCIDEV for the Hardware rev. Must check
649 what sc->rev really represents - benjsc 20070615 */
650 }
651
652 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
653 ifp->if_softc = sc;
654 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
655 ifp->if_init = wpi_init;
656 ifp->if_ioctl = wpi_ioctl;
657 ifp->if_start = wpi_start;
658 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
659 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
660 IFQ_SET_READY(&ifp->if_snd);
661
662 ieee80211_ifattach(ic, macaddr);
663 /* override default methods */
664 ic->ic_raw_xmit = wpi_raw_xmit;
665 ic->ic_wme.wme_update = wpi_wme_update;
666 ic->ic_scan_start = wpi_scan_start;
667 ic->ic_scan_end = wpi_scan_end;
668 ic->ic_set_channel = wpi_set_channel;
669 ic->ic_scan_curchan = wpi_scan_curchan;
670 ic->ic_scan_mindwell = wpi_scan_mindwell;
671
672 ic->ic_vap_create = wpi_vap_create;
673 ic->ic_vap_delete = wpi_vap_delete;
674
675 ieee80211_radiotap_attach(ic,
676 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
677 WPI_TX_RADIOTAP_PRESENT,
678 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
679 WPI_RX_RADIOTAP_PRESENT);
680
681 /*
682 * Hook our interrupt after all initialization is complete.
683 */
684 error = bus_setup_intr(dev, sc->irq, INTR_TYPE_NET |INTR_MPSAFE,
685 NULL, wpi_intr, sc, &sc->sc_ih);
686 if (error != 0) {
687 device_printf(dev, "could not set up interrupt\n");
688 goto fail;
689 }
690
691 if (bootverbose)
692 ieee80211_announce(ic);
693 #ifdef XXX_DEBUG
694 ieee80211_announce_channels(ic);
695 #endif
696 return 0;
697
698 fail: wpi_detach(dev);
699 return ENXIO;
700 }
701
702 static int
wpi_detach(device_t dev)703 wpi_detach(device_t dev)
704 {
705 struct wpi_softc *sc = device_get_softc(dev);
706 struct ifnet *ifp = sc->sc_ifp;
707 struct ieee80211com *ic;
708 int ac;
709
710 if (sc->irq != NULL)
711 bus_teardown_intr(dev, sc->irq, sc->sc_ih);
712
713 if (ifp != NULL) {
714 ic = ifp->if_l2com;
715
716 ieee80211_draintask(ic, &sc->sc_restarttask);
717 ieee80211_draintask(ic, &sc->sc_radiotask);
718 wpi_stop(sc);
719 callout_drain(&sc->watchdog_to);
720 callout_drain(&sc->calib_to);
721 ieee80211_ifdetach(ic);
722 }
723
724 WPI_LOCK(sc);
725 if (sc->txq[0].data_dmat) {
726 for (ac = 0; ac < WME_NUM_AC; ac++)
727 wpi_free_tx_ring(sc, &sc->txq[ac]);
728
729 wpi_free_tx_ring(sc, &sc->cmdq);
730 wpi_free_rx_ring(sc, &sc->rxq);
731 wpi_free_shared(sc);
732 }
733
734 if (sc->fw_fp != NULL) {
735 wpi_unload_firmware(sc);
736 }
737
738 if (sc->fw_dma.tag)
739 wpi_free_fwmem(sc);
740 WPI_UNLOCK(sc);
741
742 if (sc->irq != NULL)
743 bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq),
744 sc->irq);
745 if (sc->mem != NULL)
746 bus_release_resource(dev, SYS_RES_MEMORY,
747 rman_get_rid(sc->mem), sc->mem);
748
749 if (ifp != NULL)
750 if_free(ifp);
751
752 WPI_LOCK_DESTROY(sc);
753
754 return 0;
755 }
756
757 static struct ieee80211vap *
wpi_vap_create(struct ieee80211com * ic,const char name[IFNAMSIZ],int unit,enum ieee80211_opmode opmode,int flags,const uint8_t bssid[IEEE80211_ADDR_LEN],const uint8_t mac[IEEE80211_ADDR_LEN])758 wpi_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
759 enum ieee80211_opmode opmode, int flags,
760 const uint8_t bssid[IEEE80211_ADDR_LEN],
761 const uint8_t mac[IEEE80211_ADDR_LEN])
762 {
763 struct wpi_vap *wvp;
764 struct ieee80211vap *vap;
765
766 if (!TAILQ_EMPTY(&ic->ic_vaps)) /* only one at a time */
767 return NULL;
768 wvp = (struct wpi_vap *) malloc(sizeof(struct wpi_vap),
769 M_80211_VAP, M_NOWAIT | M_ZERO);
770 if (wvp == NULL)
771 return NULL;
772 vap = &wvp->vap;
773 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
774 /* override with driver methods */
775 wvp->newstate = vap->iv_newstate;
776 vap->iv_newstate = wpi_newstate;
777
778 ieee80211_ratectl_init(vap);
779 /* complete setup */
780 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status);
781 ic->ic_opmode = opmode;
782 return vap;
783 }
784
785 static void
wpi_vap_delete(struct ieee80211vap * vap)786 wpi_vap_delete(struct ieee80211vap *vap)
787 {
788 struct wpi_vap *wvp = WPI_VAP(vap);
789
790 ieee80211_ratectl_deinit(vap);
791 ieee80211_vap_detach(vap);
792 free(wvp, M_80211_VAP);
793 }
794
795 static void
wpi_dma_map_addr(void * arg,bus_dma_segment_t * segs,int nsegs,int error)796 wpi_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
797 {
798 if (error != 0)
799 return;
800
801 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs));
802
803 *(bus_addr_t *)arg = segs[0].ds_addr;
804 }
805
806 /*
807 * Allocates a contiguous block of dma memory of the requested size and
808 * alignment. Due to limitations of the FreeBSD dma subsystem as of 20071217,
809 * allocations greater than 4096 may fail. Hence if the requested alignment is
810 * greater we allocate 'alignment' size extra memory and shift the vaddr and
811 * paddr after the dma load. This bypasses the problem at the cost of a little
812 * more memory.
813 */
814 static int
wpi_dma_contig_alloc(struct wpi_softc * sc,struct wpi_dma_info * dma,void ** kvap,bus_size_t size,bus_size_t alignment,int flags)815 wpi_dma_contig_alloc(struct wpi_softc *sc, struct wpi_dma_info *dma,
816 void **kvap, bus_size_t size, bus_size_t alignment, int flags)
817 {
818 int error;
819 bus_size_t align;
820 bus_size_t reqsize;
821
822 DPRINTFN(WPI_DEBUG_DMA,
823 ("Size: %zd - alignment %zd\n", size, alignment));
824
825 dma->size = size;
826 dma->tag = NULL;
827
828 if (alignment > 4096) {
829 align = PAGE_SIZE;
830 reqsize = size + alignment;
831 } else {
832 align = alignment;
833 reqsize = size;
834 }
835 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), align,
836 0, BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR,
837 NULL, NULL, reqsize,
838 1, reqsize, flags,
839 NULL, NULL, &dma->tag);
840 if (error != 0) {
841 device_printf(sc->sc_dev,
842 "could not create shared page DMA tag\n");
843 goto fail;
844 }
845 error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr_start,
846 flags | BUS_DMA_ZERO, &dma->map);
847 if (error != 0) {
848 device_printf(sc->sc_dev,
849 "could not allocate shared page DMA memory\n");
850 goto fail;
851 }
852
853 error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr_start,
854 reqsize, wpi_dma_map_addr, &dma->paddr_start, flags);
855
856 /* Save the original pointers so we can free all the memory */
857 dma->paddr = dma->paddr_start;
858 dma->vaddr = dma->vaddr_start;
859
860 /*
861 * Check the alignment and increment by 4096 until we get the
862 * requested alignment. Fail if can't obtain the alignment
863 * we requested.
864 */
865 if ((dma->paddr & (alignment -1 )) != 0) {
866 int i;
867
868 for (i = 0; i < alignment / 4096; i++) {
869 if ((dma->paddr & (alignment - 1 )) == 0)
870 break;
871 dma->paddr += 4096;
872 dma->vaddr += 4096;
873 }
874 if (i == alignment / 4096) {
875 device_printf(sc->sc_dev,
876 "alignment requirement was not satisfied\n");
877 goto fail;
878 }
879 }
880
881 if (error != 0) {
882 device_printf(sc->sc_dev,
883 "could not load shared page DMA map\n");
884 goto fail;
885 }
886
887 if (kvap != NULL)
888 *kvap = dma->vaddr;
889
890 return 0;
891
892 fail:
893 wpi_dma_contig_free(dma);
894 return error;
895 }
896
897 static void
wpi_dma_contig_free(struct wpi_dma_info * dma)898 wpi_dma_contig_free(struct wpi_dma_info *dma)
899 {
900 if (dma->tag) {
901 if (dma->map != NULL) {
902 if (dma->paddr_start != 0) {
903 bus_dmamap_sync(dma->tag, dma->map,
904 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
905 bus_dmamap_unload(dma->tag, dma->map);
906 }
907 bus_dmamem_free(dma->tag, &dma->vaddr_start, dma->map);
908 }
909 bus_dma_tag_destroy(dma->tag);
910 }
911 }
912
913 /*
914 * Allocate a shared page between host and NIC.
915 */
916 static int
wpi_alloc_shared(struct wpi_softc * sc)917 wpi_alloc_shared(struct wpi_softc *sc)
918 {
919 int error;
920
921 error = wpi_dma_contig_alloc(sc, &sc->shared_dma,
922 (void **)&sc->shared, sizeof (struct wpi_shared),
923 PAGE_SIZE,
924 BUS_DMA_NOWAIT);
925
926 if (error != 0) {
927 device_printf(sc->sc_dev,
928 "could not allocate shared area DMA memory\n");
929 }
930
931 return error;
932 }
933
934 static void
wpi_free_shared(struct wpi_softc * sc)935 wpi_free_shared(struct wpi_softc *sc)
936 {
937 wpi_dma_contig_free(&sc->shared_dma);
938 }
939
940 static int
wpi_alloc_rx_ring(struct wpi_softc * sc,struct wpi_rx_ring * ring)941 wpi_alloc_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
942 {
943
944 int i, error;
945
946 ring->cur = 0;
947
948 error = wpi_dma_contig_alloc(sc, &ring->desc_dma,
949 (void **)&ring->desc, WPI_RX_RING_COUNT * sizeof (uint32_t),
950 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
951
952 if (error != 0) {
953 device_printf(sc->sc_dev,
954 "%s: could not allocate rx ring DMA memory, error %d\n",
955 __func__, error);
956 goto fail;
957 }
958
959 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
960 BUS_SPACE_MAXADDR_32BIT,
961 BUS_SPACE_MAXADDR, NULL, NULL, MJUMPAGESIZE, 1,
962 MJUMPAGESIZE, BUS_DMA_NOWAIT, NULL, NULL, &ring->data_dmat);
963 if (error != 0) {
964 device_printf(sc->sc_dev,
965 "%s: bus_dma_tag_create_failed, error %d\n",
966 __func__, error);
967 goto fail;
968 }
969
970 /*
971 * Setup Rx buffers.
972 */
973 for (i = 0; i < WPI_RX_RING_COUNT; i++) {
974 struct wpi_rx_data *data = &ring->data[i];
975 struct mbuf *m;
976 bus_addr_t paddr;
977
978 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
979 if (error != 0) {
980 device_printf(sc->sc_dev,
981 "%s: bus_dmamap_create failed, error %d\n",
982 __func__, error);
983 goto fail;
984 }
985 m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
986 if (m == NULL) {
987 device_printf(sc->sc_dev,
988 "%s: could not allocate rx mbuf\n", __func__);
989 error = ENOMEM;
990 goto fail;
991 }
992 /* map page */
993 error = bus_dmamap_load(ring->data_dmat, data->map,
994 mtod(m, caddr_t), MJUMPAGESIZE,
995 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT);
996 if (error != 0 && error != EFBIG) {
997 device_printf(sc->sc_dev,
998 "%s: bus_dmamap_load failed, error %d\n",
999 __func__, error);
1000 m_freem(m);
1001 error = ENOMEM; /* XXX unique code */
1002 goto fail;
1003 }
1004 bus_dmamap_sync(ring->data_dmat, data->map,
1005 BUS_DMASYNC_PREWRITE);
1006
1007 data->m = m;
1008 ring->desc[i] = htole32(paddr);
1009 }
1010 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
1011 BUS_DMASYNC_PREWRITE);
1012 return 0;
1013 fail:
1014 wpi_free_rx_ring(sc, ring);
1015 return error;
1016 }
1017
1018 static void
wpi_reset_rx_ring(struct wpi_softc * sc,struct wpi_rx_ring * ring)1019 wpi_reset_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
1020 {
1021 int ntries;
1022
1023 wpi_mem_lock(sc);
1024
1025 WPI_WRITE(sc, WPI_RX_CONFIG, 0);
1026
1027 for (ntries = 0; ntries < 100; ntries++) {
1028 if (WPI_READ(sc, WPI_RX_STATUS) & WPI_RX_IDLE)
1029 break;
1030 DELAY(10);
1031 }
1032
1033 wpi_mem_unlock(sc);
1034
1035 #ifdef WPI_DEBUG
1036 if (ntries == 100 && wpi_debug > 0)
1037 device_printf(sc->sc_dev, "timeout resetting Rx ring\n");
1038 #endif
1039
1040 ring->cur = 0;
1041 }
1042
1043 static void
wpi_free_rx_ring(struct wpi_softc * sc,struct wpi_rx_ring * ring)1044 wpi_free_rx_ring(struct wpi_softc *sc, struct wpi_rx_ring *ring)
1045 {
1046 int i;
1047
1048 wpi_dma_contig_free(&ring->desc_dma);
1049
1050 for (i = 0; i < WPI_RX_RING_COUNT; i++) {
1051 struct wpi_rx_data *data = &ring->data[i];
1052
1053 if (data->m != NULL) {
1054 bus_dmamap_sync(ring->data_dmat, data->map,
1055 BUS_DMASYNC_POSTREAD);
1056 bus_dmamap_unload(ring->data_dmat, data->map);
1057 m_freem(data->m);
1058 }
1059 if (data->map != NULL)
1060 bus_dmamap_destroy(ring->data_dmat, data->map);
1061 }
1062 }
1063
1064 static int
wpi_alloc_tx_ring(struct wpi_softc * sc,struct wpi_tx_ring * ring,int count,int qid)1065 wpi_alloc_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring, int count,
1066 int qid)
1067 {
1068 struct wpi_tx_data *data;
1069 int i, error;
1070
1071 ring->qid = qid;
1072 ring->count = count;
1073 ring->queued = 0;
1074 ring->cur = 0;
1075 ring->data = NULL;
1076
1077 error = wpi_dma_contig_alloc(sc, &ring->desc_dma,
1078 (void **)&ring->desc, count * sizeof (struct wpi_tx_desc),
1079 WPI_RING_DMA_ALIGN, BUS_DMA_NOWAIT);
1080
1081 if (error != 0) {
1082 device_printf(sc->sc_dev, "could not allocate tx dma memory\n");
1083 goto fail;
1084 }
1085
1086 /* update shared page with ring's base address */
1087 sc->shared->txbase[qid] = htole32(ring->desc_dma.paddr);
1088
1089 error = wpi_dma_contig_alloc(sc, &ring->cmd_dma, (void **)&ring->cmd,
1090 count * sizeof (struct wpi_tx_cmd), WPI_RING_DMA_ALIGN,
1091 BUS_DMA_NOWAIT);
1092
1093 if (error != 0) {
1094 device_printf(sc->sc_dev,
1095 "could not allocate tx command DMA memory\n");
1096 goto fail;
1097 }
1098
1099 ring->data = malloc(count * sizeof (struct wpi_tx_data), M_DEVBUF,
1100 M_NOWAIT | M_ZERO);
1101 if (ring->data == NULL) {
1102 device_printf(sc->sc_dev,
1103 "could not allocate tx data slots\n");
1104 goto fail;
1105 }
1106
1107 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
1108 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
1109 WPI_MAX_SCATTER - 1, MCLBYTES, BUS_DMA_NOWAIT, NULL, NULL,
1110 &ring->data_dmat);
1111 if (error != 0) {
1112 device_printf(sc->sc_dev, "could not create data DMA tag\n");
1113 goto fail;
1114 }
1115
1116 for (i = 0; i < count; i++) {
1117 data = &ring->data[i];
1118
1119 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
1120 if (error != 0) {
1121 device_printf(sc->sc_dev,
1122 "could not create tx buf DMA map\n");
1123 goto fail;
1124 }
1125 bus_dmamap_sync(ring->data_dmat, data->map,
1126 BUS_DMASYNC_PREWRITE);
1127 }
1128
1129 return 0;
1130
1131 fail:
1132 wpi_free_tx_ring(sc, ring);
1133 return error;
1134 }
1135
1136 static void
wpi_reset_tx_ring(struct wpi_softc * sc,struct wpi_tx_ring * ring)1137 wpi_reset_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring)
1138 {
1139 struct wpi_tx_data *data;
1140 int i, ntries;
1141
1142 wpi_mem_lock(sc);
1143
1144 WPI_WRITE(sc, WPI_TX_CONFIG(ring->qid), 0);
1145 for (ntries = 0; ntries < 100; ntries++) {
1146 if (WPI_READ(sc, WPI_TX_STATUS) & WPI_TX_IDLE(ring->qid))
1147 break;
1148 DELAY(10);
1149 }
1150 #ifdef WPI_DEBUG
1151 if (ntries == 100 && wpi_debug > 0)
1152 device_printf(sc->sc_dev, "timeout resetting Tx ring %d\n",
1153 ring->qid);
1154 #endif
1155 wpi_mem_unlock(sc);
1156
1157 for (i = 0; i < ring->count; i++) {
1158 data = &ring->data[i];
1159
1160 if (data->m != NULL) {
1161 bus_dmamap_unload(ring->data_dmat, data->map);
1162 m_freem(data->m);
1163 data->m = NULL;
1164 }
1165 }
1166
1167 ring->queued = 0;
1168 ring->cur = 0;
1169 }
1170
1171 static void
wpi_free_tx_ring(struct wpi_softc * sc,struct wpi_tx_ring * ring)1172 wpi_free_tx_ring(struct wpi_softc *sc, struct wpi_tx_ring *ring)
1173 {
1174 struct wpi_tx_data *data;
1175 int i;
1176
1177 wpi_dma_contig_free(&ring->desc_dma);
1178 wpi_dma_contig_free(&ring->cmd_dma);
1179
1180 if (ring->data != NULL) {
1181 for (i = 0; i < ring->count; i++) {
1182 data = &ring->data[i];
1183
1184 if (data->m != NULL) {
1185 bus_dmamap_sync(ring->data_dmat, data->map,
1186 BUS_DMASYNC_POSTWRITE);
1187 bus_dmamap_unload(ring->data_dmat, data->map);
1188 m_freem(data->m);
1189 data->m = NULL;
1190 }
1191 }
1192 free(ring->data, M_DEVBUF);
1193 }
1194
1195 if (ring->data_dmat != NULL)
1196 bus_dma_tag_destroy(ring->data_dmat);
1197 }
1198
1199 static int
wpi_shutdown(device_t dev)1200 wpi_shutdown(device_t dev)
1201 {
1202 struct wpi_softc *sc = device_get_softc(dev);
1203
1204 WPI_LOCK(sc);
1205 wpi_stop_locked(sc);
1206 wpi_unload_firmware(sc);
1207 WPI_UNLOCK(sc);
1208
1209 return 0;
1210 }
1211
1212 static int
wpi_suspend(device_t dev)1213 wpi_suspend(device_t dev)
1214 {
1215 struct wpi_softc *sc = device_get_softc(dev);
1216 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
1217
1218 ieee80211_suspend_all(ic);
1219 return 0;
1220 }
1221
1222 static int
wpi_resume(device_t dev)1223 wpi_resume(device_t dev)
1224 {
1225 struct wpi_softc *sc = device_get_softc(dev);
1226 struct ieee80211com *ic = sc->sc_ifp->if_l2com;
1227
1228 pci_write_config(dev, 0x41, 0, 1);
1229
1230 ieee80211_resume_all(ic);
1231 return 0;
1232 }
1233
1234 /**
1235 * Called by net80211 when ever there is a change to 80211 state machine
1236 */
1237 static int
wpi_newstate(struct ieee80211vap * vap,enum ieee80211_state nstate,int arg)1238 wpi_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
1239 {
1240 struct wpi_vap *wvp = WPI_VAP(vap);
1241 struct ieee80211com *ic = vap->iv_ic;
1242 struct ifnet *ifp = ic->ic_ifp;
1243 struct wpi_softc *sc = ifp->if_softc;
1244 int error;
1245
1246 DPRINTF(("%s: %s -> %s flags 0x%x\n", __func__,
1247 ieee80211_state_name[vap->iv_state],
1248 ieee80211_state_name[nstate], sc->flags));
1249
1250 IEEE80211_UNLOCK(ic);
1251 WPI_LOCK(sc);
1252 if (nstate == IEEE80211_S_SCAN && vap->iv_state != IEEE80211_S_INIT) {
1253 /*
1254 * On !INIT -> SCAN transitions, we need to clear any possible
1255 * knowledge about associations.
1256 */
1257 error = wpi_config(sc);
1258 if (error != 0) {
1259 device_printf(sc->sc_dev,
1260 "%s: device config failed, error %d\n",
1261 __func__, error);
1262 }
1263 }
1264 if (nstate == IEEE80211_S_AUTH ||
1265 (nstate == IEEE80211_S_ASSOC && vap->iv_state == IEEE80211_S_RUN)) {
1266 /*
1267 * The node must be registered in the firmware before auth.
1268 * Also the associd must be cleared on RUN -> ASSOC
1269 * transitions.
1270 */
1271 error = wpi_auth(sc, vap);
1272 if (error != 0) {
1273 device_printf(sc->sc_dev,
1274 "%s: could not move to auth state, error %d\n",
1275 __func__, error);
1276 }
1277 }
1278 if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) {
1279 error = wpi_run(sc, vap);
1280 if (error != 0) {
1281 device_printf(sc->sc_dev,
1282 "%s: could not move to run state, error %d\n",
1283 __func__, error);
1284 }
1285 }
1286 if (nstate == IEEE80211_S_RUN) {
1287 /* RUN -> RUN transition; just restart the timers */
1288 wpi_calib_timeout(sc);
1289 /* XXX split out rate control timer */
1290 }
1291 WPI_UNLOCK(sc);
1292 IEEE80211_LOCK(ic);
1293 return wvp->newstate(vap, nstate, arg);
1294 }
1295
1296 /*
1297 * Grab exclusive access to NIC memory.
1298 */
1299 static void
wpi_mem_lock(struct wpi_softc * sc)1300 wpi_mem_lock(struct wpi_softc *sc)
1301 {
1302 int ntries;
1303 uint32_t tmp;
1304
1305 tmp = WPI_READ(sc, WPI_GPIO_CTL);
1306 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_MAC);
1307
1308 /* spin until we actually get the lock */
1309 for (ntries = 0; ntries < 100; ntries++) {
1310 if ((WPI_READ(sc, WPI_GPIO_CTL) &
1311 (WPI_GPIO_CLOCK | WPI_GPIO_SLEEP)) == WPI_GPIO_CLOCK)
1312 break;
1313 DELAY(10);
1314 }
1315 if (ntries == 100)
1316 device_printf(sc->sc_dev, "could not lock memory\n");
1317 }
1318
1319 /*
1320 * Release lock on NIC memory.
1321 */
1322 static void
wpi_mem_unlock(struct wpi_softc * sc)1323 wpi_mem_unlock(struct wpi_softc *sc)
1324 {
1325 uint32_t tmp = WPI_READ(sc, WPI_GPIO_CTL);
1326 WPI_WRITE(sc, WPI_GPIO_CTL, tmp & ~WPI_GPIO_MAC);
1327 }
1328
1329 static uint32_t
wpi_mem_read(struct wpi_softc * sc,uint16_t addr)1330 wpi_mem_read(struct wpi_softc *sc, uint16_t addr)
1331 {
1332 WPI_WRITE(sc, WPI_READ_MEM_ADDR, WPI_MEM_4 | addr);
1333 return WPI_READ(sc, WPI_READ_MEM_DATA);
1334 }
1335
1336 static void
wpi_mem_write(struct wpi_softc * sc,uint16_t addr,uint32_t data)1337 wpi_mem_write(struct wpi_softc *sc, uint16_t addr, uint32_t data)
1338 {
1339 WPI_WRITE(sc, WPI_WRITE_MEM_ADDR, WPI_MEM_4 | addr);
1340 WPI_WRITE(sc, WPI_WRITE_MEM_DATA, data);
1341 }
1342
1343 static void
wpi_mem_write_region_4(struct wpi_softc * sc,uint16_t addr,const uint32_t * data,int wlen)1344 wpi_mem_write_region_4(struct wpi_softc *sc, uint16_t addr,
1345 const uint32_t *data, int wlen)
1346 {
1347 for (; wlen > 0; wlen--, data++, addr+=4)
1348 wpi_mem_write(sc, addr, *data);
1349 }
1350
1351 /*
1352 * Read data from the EEPROM. We access EEPROM through the MAC instead of
1353 * using the traditional bit-bang method. Data is read up until len bytes have
1354 * been obtained.
1355 */
1356 static uint16_t
wpi_read_prom_data(struct wpi_softc * sc,uint32_t addr,void * data,int len)1357 wpi_read_prom_data(struct wpi_softc *sc, uint32_t addr, void *data, int len)
1358 {
1359 int ntries;
1360 uint32_t val;
1361 uint8_t *out = data;
1362
1363 wpi_mem_lock(sc);
1364
1365 for (; len > 0; len -= 2, addr++) {
1366 WPI_WRITE(sc, WPI_EEPROM_CTL, addr << 2);
1367
1368 for (ntries = 0; ntries < 10; ntries++) {
1369 if ((val = WPI_READ(sc, WPI_EEPROM_CTL)) & WPI_EEPROM_READY)
1370 break;
1371 DELAY(5);
1372 }
1373
1374 if (ntries == 10) {
1375 device_printf(sc->sc_dev, "could not read EEPROM\n");
1376 return ETIMEDOUT;
1377 }
1378
1379 *out++= val >> 16;
1380 if (len > 1)
1381 *out ++= val >> 24;
1382 }
1383
1384 wpi_mem_unlock(sc);
1385
1386 return 0;
1387 }
1388
1389 /*
1390 * The firmware text and data segments are transferred to the NIC using DMA.
1391 * The driver just copies the firmware into DMA-safe memory and tells the NIC
1392 * where to find it. Once the NIC has copied the firmware into its internal
1393 * memory, we can free our local copy in the driver.
1394 */
1395 static int
wpi_load_microcode(struct wpi_softc * sc,const uint8_t * fw,int size)1396 wpi_load_microcode(struct wpi_softc *sc, const uint8_t *fw, int size)
1397 {
1398 int error, ntries;
1399
1400 DPRINTFN(WPI_DEBUG_HW,("Loading microcode size 0x%x\n", size));
1401
1402 size /= sizeof(uint32_t);
1403
1404 wpi_mem_lock(sc);
1405
1406 wpi_mem_write_region_4(sc, WPI_MEM_UCODE_BASE,
1407 (const uint32_t *)fw, size);
1408
1409 wpi_mem_write(sc, WPI_MEM_UCODE_SRC, 0);
1410 wpi_mem_write(sc, WPI_MEM_UCODE_DST, WPI_FW_TEXT);
1411 wpi_mem_write(sc, WPI_MEM_UCODE_SIZE, size);
1412
1413 /* run microcode */
1414 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_RUN);
1415
1416 /* wait while the adapter is busy copying the firmware */
1417 for (error = 0, ntries = 0; ntries < 1000; ntries++) {
1418 uint32_t status = WPI_READ(sc, WPI_TX_STATUS);
1419 DPRINTFN(WPI_DEBUG_HW,
1420 ("firmware status=0x%x, val=0x%x, result=0x%x\n", status,
1421 WPI_TX_IDLE(6), status & WPI_TX_IDLE(6)));
1422 if (status & WPI_TX_IDLE(6)) {
1423 DPRINTFN(WPI_DEBUG_HW,
1424 ("Status Match! - ntries = %d\n", ntries));
1425 break;
1426 }
1427 DELAY(10);
1428 }
1429 if (ntries == 1000) {
1430 device_printf(sc->sc_dev, "timeout transferring firmware\n");
1431 error = ETIMEDOUT;
1432 }
1433
1434 /* start the microcode executing */
1435 wpi_mem_write(sc, WPI_MEM_UCODE_CTL, WPI_UC_ENABLE);
1436
1437 wpi_mem_unlock(sc);
1438
1439 return (error);
1440 }
1441
1442 static void
wpi_rx_intr(struct wpi_softc * sc,struct wpi_rx_desc * desc,struct wpi_rx_data * data)1443 wpi_rx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc,
1444 struct wpi_rx_data *data)
1445 {
1446 struct ifnet *ifp = sc->sc_ifp;
1447 struct ieee80211com *ic = ifp->if_l2com;
1448 struct wpi_rx_ring *ring = &sc->rxq;
1449 struct wpi_rx_stat *stat;
1450 struct wpi_rx_head *head;
1451 struct wpi_rx_tail *tail;
1452 struct ieee80211_node *ni;
1453 struct mbuf *m, *mnew;
1454 bus_addr_t paddr;
1455 int error;
1456
1457 stat = (struct wpi_rx_stat *)(desc + 1);
1458
1459 if (stat->len > WPI_STAT_MAXLEN) {
1460 device_printf(sc->sc_dev, "invalid rx statistic header\n");
1461 ifp->if_ierrors++;
1462 return;
1463 }
1464
1465 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_POSTREAD);
1466 head = (struct wpi_rx_head *)((caddr_t)(stat + 1) + stat->len);
1467 tail = (struct wpi_rx_tail *)((caddr_t)(head + 1) + le16toh(head->len));
1468
1469 DPRINTFN(WPI_DEBUG_RX, ("rx intr: idx=%d len=%d stat len=%d rssi=%d "
1470 "rate=%x chan=%d tstamp=%ju\n", ring->cur, le32toh(desc->len),
1471 le16toh(head->len), (int8_t)stat->rssi, head->rate, head->chan,
1472 (uintmax_t)le64toh(tail->tstamp)));
1473
1474 /* discard Rx frames with bad CRC early */
1475 if ((le32toh(tail->flags) & WPI_RX_NOERROR) != WPI_RX_NOERROR) {
1476 DPRINTFN(WPI_DEBUG_RX, ("%s: rx flags error %x\n", __func__,
1477 le32toh(tail->flags)));
1478 ifp->if_ierrors++;
1479 return;
1480 }
1481 if (le16toh(head->len) < sizeof (struct ieee80211_frame)) {
1482 DPRINTFN(WPI_DEBUG_RX, ("%s: frame too short: %d\n", __func__,
1483 le16toh(head->len)));
1484 ifp->if_ierrors++;
1485 return;
1486 }
1487
1488 /* XXX don't need mbuf, just dma buffer */
1489 mnew = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
1490 if (mnew == NULL) {
1491 DPRINTFN(WPI_DEBUG_RX, ("%s: no mbuf to restock ring\n",
1492 __func__));
1493 ifp->if_ierrors++;
1494 return;
1495 }
1496 bus_dmamap_unload(ring->data_dmat, data->map);
1497
1498 error = bus_dmamap_load(ring->data_dmat, data->map,
1499 mtod(mnew, caddr_t), MJUMPAGESIZE,
1500 wpi_dma_map_addr, &paddr, BUS_DMA_NOWAIT);
1501 if (error != 0 && error != EFBIG) {
1502 device_printf(sc->sc_dev,
1503 "%s: bus_dmamap_load failed, error %d\n", __func__, error);
1504 m_freem(mnew);
1505 ifp->if_ierrors++;
1506 return;
1507 }
1508 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1509
1510 /* finalize mbuf and swap in new one */
1511 m = data->m;
1512 m->m_pkthdr.rcvif = ifp;
1513 m->m_data = (caddr_t)(head + 1);
1514 m->m_pkthdr.len = m->m_len = le16toh(head->len);
1515
1516 data->m = mnew;
1517 /* update Rx descriptor */
1518 ring->desc[ring->cur] = htole32(paddr);
1519
1520 if (ieee80211_radiotap_active(ic)) {
1521 struct wpi_rx_radiotap_header *tap = &sc->sc_rxtap;
1522
1523 tap->wr_flags = 0;
1524 tap->wr_chan_freq =
1525 htole16(ic->ic_channels[head->chan].ic_freq);
1526 tap->wr_chan_flags =
1527 htole16(ic->ic_channels[head->chan].ic_flags);
1528 tap->wr_dbm_antsignal = (int8_t)(stat->rssi - WPI_RSSI_OFFSET);
1529 tap->wr_dbm_antnoise = (int8_t)le16toh(stat->noise);
1530 tap->wr_tsft = tail->tstamp;
1531 tap->wr_antenna = (le16toh(head->flags) >> 4) & 0xf;
1532 switch (head->rate) {
1533 /* CCK rates */
1534 case 10: tap->wr_rate = 2; break;
1535 case 20: tap->wr_rate = 4; break;
1536 case 55: tap->wr_rate = 11; break;
1537 case 110: tap->wr_rate = 22; break;
1538 /* OFDM rates */
1539 case 0xd: tap->wr_rate = 12; break;
1540 case 0xf: tap->wr_rate = 18; break;
1541 case 0x5: tap->wr_rate = 24; break;
1542 case 0x7: tap->wr_rate = 36; break;
1543 case 0x9: tap->wr_rate = 48; break;
1544 case 0xb: tap->wr_rate = 72; break;
1545 case 0x1: tap->wr_rate = 96; break;
1546 case 0x3: tap->wr_rate = 108; break;
1547 /* unknown rate: should not happen */
1548 default: tap->wr_rate = 0;
1549 }
1550 if (le16toh(head->flags) & 0x4)
1551 tap->wr_flags |= IEEE80211_RADIOTAP_F_SHORTPRE;
1552 }
1553
1554 WPI_UNLOCK(sc);
1555
1556 ni = ieee80211_find_rxnode(ic, mtod(m, struct ieee80211_frame_min *));
1557 if (ni != NULL) {
1558 (void) ieee80211_input(ni, m, stat->rssi, 0);
1559 ieee80211_free_node(ni);
1560 } else
1561 (void) ieee80211_input_all(ic, m, stat->rssi, 0);
1562
1563 WPI_LOCK(sc);
1564 }
1565
1566 static void
wpi_tx_intr(struct wpi_softc * sc,struct wpi_rx_desc * desc)1567 wpi_tx_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc)
1568 {
1569 struct ifnet *ifp = sc->sc_ifp;
1570 struct wpi_tx_ring *ring = &sc->txq[desc->qid & 0x3];
1571 struct wpi_tx_data *txdata = &ring->data[desc->idx];
1572 struct wpi_tx_stat *stat = (struct wpi_tx_stat *)(desc + 1);
1573 struct ieee80211_node *ni = txdata->ni;
1574 struct ieee80211vap *vap = ni->ni_vap;
1575 int retrycnt = 0;
1576
1577 DPRINTFN(WPI_DEBUG_TX, ("tx done: qid=%d idx=%d retries=%d nkill=%d "
1578 "rate=%x duration=%d status=%x\n", desc->qid, desc->idx,
1579 stat->ntries, stat->nkill, stat->rate, le32toh(stat->duration),
1580 le32toh(stat->status)));
1581
1582 /*
1583 * Update rate control statistics for the node.
1584 * XXX we should not count mgmt frames since they're always sent at
1585 * the lowest available bit-rate.
1586 * XXX frames w/o ACK shouldn't be used either
1587 */
1588 if (stat->ntries > 0) {
1589 DPRINTFN(WPI_DEBUG_TX, ("%d retries\n", stat->ntries));
1590 retrycnt = 1;
1591 }
1592 ieee80211_ratectl_tx_complete(vap, ni, IEEE80211_RATECTL_TX_SUCCESS,
1593 &retrycnt, NULL);
1594
1595 /* XXX oerrors should only count errors !maxtries */
1596 if ((le32toh(stat->status) & 0xff) != 1)
1597 ifp->if_oerrors++;
1598 else
1599 ifp->if_opackets++;
1600
1601 bus_dmamap_sync(ring->data_dmat, txdata->map, BUS_DMASYNC_POSTWRITE);
1602 bus_dmamap_unload(ring->data_dmat, txdata->map);
1603 /* XXX handle M_TXCB? */
1604 m_freem(txdata->m);
1605 txdata->m = NULL;
1606 ieee80211_free_node(txdata->ni);
1607 txdata->ni = NULL;
1608
1609 ring->queued--;
1610
1611 sc->sc_tx_timer = 0;
1612 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1613 wpi_start_locked(ifp);
1614 }
1615
1616 static void
wpi_cmd_intr(struct wpi_softc * sc,struct wpi_rx_desc * desc)1617 wpi_cmd_intr(struct wpi_softc *sc, struct wpi_rx_desc *desc)
1618 {
1619 struct wpi_tx_ring *ring = &sc->cmdq;
1620 struct wpi_tx_data *data;
1621
1622 DPRINTFN(WPI_DEBUG_CMD, ("cmd notification qid=%x idx=%d flags=%x "
1623 "type=%s len=%d\n", desc->qid, desc->idx,
1624 desc->flags, wpi_cmd_str(desc->type),
1625 le32toh(desc->len)));
1626
1627 if ((desc->qid & 7) != 4)
1628 return; /* not a command ack */
1629
1630 data = &ring->data[desc->idx];
1631
1632 /* if the command was mapped in a mbuf, free it */
1633 if (data->m != NULL) {
1634 bus_dmamap_unload(ring->data_dmat, data->map);
1635 m_freem(data->m);
1636 data->m = NULL;
1637 }
1638
1639 sc->flags &= ~WPI_FLAG_BUSY;
1640 wakeup(&ring->cmd[desc->idx]);
1641 }
1642
1643 static void
wpi_notif_intr(struct wpi_softc * sc)1644 wpi_notif_intr(struct wpi_softc *sc)
1645 {
1646 struct ifnet *ifp = sc->sc_ifp;
1647 struct ieee80211com *ic = ifp->if_l2com;
1648 struct wpi_rx_desc *desc;
1649 struct wpi_rx_data *data;
1650 uint32_t hw;
1651
1652 bus_dmamap_sync(sc->shared_dma.tag, sc->shared_dma.map,
1653 BUS_DMASYNC_POSTREAD);
1654
1655 hw = le32toh(sc->shared->next);
1656 while (sc->rxq.cur != hw) {
1657 data = &sc->rxq.data[sc->rxq.cur];
1658
1659 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1660 BUS_DMASYNC_POSTREAD);
1661 desc = (void *)data->m->m_ext.ext_buf;
1662
1663 DPRINTFN(WPI_DEBUG_NOTIFY,
1664 ("notify qid=%x idx=%d flags=%x type=%d len=%d\n",
1665 desc->qid,
1666 desc->idx,
1667 desc->flags,
1668 desc->type,
1669 le32toh(desc->len)));
1670
1671 if (!(desc->qid & 0x80)) /* reply to a command */
1672 wpi_cmd_intr(sc, desc);
1673
1674 switch (desc->type) {
1675 case WPI_RX_DONE:
1676 /* a 802.11 frame was received */
1677 wpi_rx_intr(sc, desc, data);
1678 break;
1679
1680 case WPI_TX_DONE:
1681 /* a 802.11 frame has been transmitted */
1682 wpi_tx_intr(sc, desc);
1683 break;
1684
1685 case WPI_UC_READY:
1686 {
1687 struct wpi_ucode_info *uc =
1688 (struct wpi_ucode_info *)(desc + 1);
1689
1690 /* the microcontroller is ready */
1691 DPRINTF(("microcode alive notification version %x "
1692 "alive %x\n", le32toh(uc->version),
1693 le32toh(uc->valid)));
1694
1695 if (le32toh(uc->valid) != 1) {
1696 device_printf(sc->sc_dev,
1697 "microcontroller initialization failed\n");
1698 wpi_stop_locked(sc);
1699 }
1700 break;
1701 }
1702 case WPI_STATE_CHANGED:
1703 {
1704 uint32_t *status = (uint32_t *)(desc + 1);
1705
1706 /* enabled/disabled notification */
1707 DPRINTF(("state changed to %x\n", le32toh(*status)));
1708
1709 if (le32toh(*status) & 1) {
1710 device_printf(sc->sc_dev,
1711 "Radio transmitter is switched off\n");
1712 sc->flags |= WPI_FLAG_HW_RADIO_OFF;
1713 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1714 /* Disable firmware commands */
1715 WPI_WRITE(sc, WPI_UCODE_SET, WPI_DISABLE_CMD);
1716 }
1717 break;
1718 }
1719 case WPI_START_SCAN:
1720 {
1721 #ifdef WPI_DEBUG
1722 struct wpi_start_scan *scan =
1723 (struct wpi_start_scan *)(desc + 1);
1724 #endif
1725
1726 DPRINTFN(WPI_DEBUG_SCANNING,
1727 ("scanning channel %d status %x\n",
1728 scan->chan, le32toh(scan->status)));
1729 break;
1730 }
1731 case WPI_STOP_SCAN:
1732 {
1733 #ifdef WPI_DEBUG
1734 struct wpi_stop_scan *scan =
1735 (struct wpi_stop_scan *)(desc + 1);
1736 #endif
1737 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1738
1739 DPRINTFN(WPI_DEBUG_SCANNING,
1740 ("scan finished nchan=%d status=%d chan=%d\n",
1741 scan->nchan, scan->status, scan->chan));
1742
1743 sc->sc_scan_timer = 0;
1744 ieee80211_scan_next(vap);
1745 break;
1746 }
1747 case WPI_MISSED_BEACON:
1748 {
1749 struct wpi_missed_beacon *beacon =
1750 (struct wpi_missed_beacon *)(desc + 1);
1751 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1752
1753 if (le32toh(beacon->consecutive) >=
1754 vap->iv_bmissthreshold) {
1755 DPRINTF(("Beacon miss: %u >= %u\n",
1756 le32toh(beacon->consecutive),
1757 vap->iv_bmissthreshold));
1758 ieee80211_beacon_miss(ic);
1759 }
1760 break;
1761 }
1762 }
1763
1764 sc->rxq.cur = (sc->rxq.cur + 1) % WPI_RX_RING_COUNT;
1765 }
1766
1767 /* tell the firmware what we have processed */
1768 hw = (hw == 0) ? WPI_RX_RING_COUNT - 1 : hw - 1;
1769 WPI_WRITE(sc, WPI_RX_WIDX, hw & ~7);
1770 }
1771
1772 static void
wpi_intr(void * arg)1773 wpi_intr(void *arg)
1774 {
1775 struct wpi_softc *sc = arg;
1776 uint32_t r;
1777
1778 WPI_LOCK(sc);
1779
1780 r = WPI_READ(sc, WPI_INTR);
1781 if (r == 0 || r == 0xffffffff) {
1782 WPI_UNLOCK(sc);
1783 return;
1784 }
1785
1786 /* disable interrupts */
1787 WPI_WRITE(sc, WPI_MASK, 0);
1788 /* ack interrupts */
1789 WPI_WRITE(sc, WPI_INTR, r);
1790
1791 if (r & (WPI_SW_ERROR | WPI_HW_ERROR)) {
1792 struct ifnet *ifp = sc->sc_ifp;
1793 struct ieee80211com *ic = ifp->if_l2com;
1794 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1795
1796 device_printf(sc->sc_dev, "fatal firmware error\n");
1797 DPRINTFN(6,("(%s)\n", (r & WPI_SW_ERROR) ? "(Software Error)" :
1798 "(Hardware Error)"));
1799 if (vap != NULL)
1800 ieee80211_cancel_scan(vap);
1801 ieee80211_runtask(ic, &sc->sc_restarttask);
1802 sc->flags &= ~WPI_FLAG_BUSY;
1803 WPI_UNLOCK(sc);
1804 return;
1805 }
1806
1807 if (r & WPI_RX_INTR)
1808 wpi_notif_intr(sc);
1809
1810 if (r & WPI_ALIVE_INTR) /* firmware initialized */
1811 wakeup(sc);
1812
1813 /* re-enable interrupts */
1814 if (sc->sc_ifp->if_flags & IFF_UP)
1815 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK);
1816
1817 WPI_UNLOCK(sc);
1818 }
1819
1820 static uint8_t
wpi_plcp_signal(int rate)1821 wpi_plcp_signal(int rate)
1822 {
1823 switch (rate) {
1824 /* CCK rates (returned values are device-dependent) */
1825 case 2: return 10;
1826 case 4: return 20;
1827 case 11: return 55;
1828 case 22: return 110;
1829
1830 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1831 /* R1-R4 (ral/ural is R4-R1) */
1832 case 12: return 0xd;
1833 case 18: return 0xf;
1834 case 24: return 0x5;
1835 case 36: return 0x7;
1836 case 48: return 0x9;
1837 case 72: return 0xb;
1838 case 96: return 0x1;
1839 case 108: return 0x3;
1840
1841 /* unsupported rates (should not get there) */
1842 default: return 0;
1843 }
1844 }
1845
1846 /* quickly determine if a given rate is CCK or OFDM */
1847 #define WPI_RATE_IS_OFDM(rate) ((rate) >= 12 && (rate) != 22)
1848
1849 /*
1850 * Construct the data packet for a transmit buffer and acutally put
1851 * the buffer onto the transmit ring, kicking the card to process the
1852 * the buffer.
1853 */
1854 static int
wpi_tx_data(struct wpi_softc * sc,struct mbuf * m0,struct ieee80211_node * ni,int ac)1855 wpi_tx_data(struct wpi_softc *sc, struct mbuf *m0, struct ieee80211_node *ni,
1856 int ac)
1857 {
1858 struct ieee80211vap *vap = ni->ni_vap;
1859 struct ifnet *ifp = sc->sc_ifp;
1860 struct ieee80211com *ic = ifp->if_l2com;
1861 const struct chanAccParams *cap = &ic->ic_wme.wme_chanParams;
1862 struct wpi_tx_ring *ring = &sc->txq[ac];
1863 struct wpi_tx_desc *desc;
1864 struct wpi_tx_data *data;
1865 struct wpi_tx_cmd *cmd;
1866 struct wpi_cmd_data *tx;
1867 struct ieee80211_frame *wh;
1868 const struct ieee80211_txparam *tp;
1869 struct ieee80211_key *k;
1870 struct mbuf *mnew;
1871 int i, error, nsegs, rate, hdrlen, ismcast;
1872 bus_dma_segment_t segs[WPI_MAX_SCATTER];
1873
1874 desc = &ring->desc[ring->cur];
1875 data = &ring->data[ring->cur];
1876
1877 wh = mtod(m0, struct ieee80211_frame *);
1878
1879 hdrlen = ieee80211_hdrsize(wh);
1880 ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
1881
1882 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1883 k = ieee80211_crypto_encap(ni, m0);
1884 if (k == NULL) {
1885 m_freem(m0);
1886 return ENOBUFS;
1887 }
1888 /* packet header may have moved, reset our local pointer */
1889 wh = mtod(m0, struct ieee80211_frame *);
1890 }
1891
1892 cmd = &ring->cmd[ring->cur];
1893 cmd->code = WPI_CMD_TX_DATA;
1894 cmd->flags = 0;
1895 cmd->qid = ring->qid;
1896 cmd->idx = ring->cur;
1897
1898 tx = (struct wpi_cmd_data *)cmd->data;
1899 tx->flags = htole32(WPI_TX_AUTO_SEQ);
1900 tx->timeout = htole16(0);
1901 tx->ofdm_mask = 0xff;
1902 tx->cck_mask = 0x0f;
1903 tx->lifetime = htole32(WPI_LIFETIME_INFINITE);
1904 tx->id = ismcast ? WPI_ID_BROADCAST : WPI_ID_BSS;
1905 tx->len = htole16(m0->m_pkthdr.len);
1906
1907 if (!ismcast) {
1908 if ((ni->ni_flags & IEEE80211_NODE_QOS) == 0 ||
1909 !cap->cap_wmeParams[ac].wmep_noackPolicy)
1910 tx->flags |= htole32(WPI_TX_NEED_ACK);
1911 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold) {
1912 tx->flags |= htole32(WPI_TX_NEED_RTS|WPI_TX_FULL_TXOP);
1913 tx->rts_ntries = 7;
1914 }
1915 }
1916 /* pick a rate */
1917 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)];
1918 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_MGT) {
1919 uint8_t subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
1920 /* tell h/w to set timestamp in probe responses */
1921 if (subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1922 tx->flags |= htole32(WPI_TX_INSERT_TSTAMP);
1923 if (subtype == IEEE80211_FC0_SUBTYPE_ASSOC_REQ ||
1924 subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ)
1925 tx->timeout = htole16(3);
1926 else
1927 tx->timeout = htole16(2);
1928 rate = tp->mgmtrate;
1929 } else if (ismcast) {
1930 rate = tp->mcastrate;
1931 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
1932 rate = tp->ucastrate;
1933 } else {
1934 (void) ieee80211_ratectl_rate(ni, NULL, 0);
1935 rate = ni->ni_txrate;
1936 }
1937 tx->rate = wpi_plcp_signal(rate);
1938
1939 /* be very persistant at sending frames out */
1940 #if 0
1941 tx->data_ntries = tp->maxretry;
1942 #else
1943 tx->data_ntries = 15; /* XXX way too high */
1944 #endif
1945
1946 if (ieee80211_radiotap_active_vap(vap)) {
1947 struct wpi_tx_radiotap_header *tap = &sc->sc_txtap;
1948 tap->wt_flags = 0;
1949 tap->wt_rate = rate;
1950 tap->wt_hwqueue = ac;
1951 if (wh->i_fc[1] & IEEE80211_FC1_WEP)
1952 tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
1953
1954 ieee80211_radiotap_tx(vap, m0);
1955 }
1956
1957 /* save and trim IEEE802.11 header */
1958 m_copydata(m0, 0, hdrlen, (caddr_t)&tx->wh);
1959 m_adj(m0, hdrlen);
1960
1961 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m0, segs,
1962 &nsegs, BUS_DMA_NOWAIT);
1963 if (error != 0 && error != EFBIG) {
1964 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1965 error);
1966 m_freem(m0);
1967 return error;
1968 }
1969 if (error != 0) {
1970 /* XXX use m_collapse */
1971 mnew = m_defrag(m0, M_NOWAIT);
1972 if (mnew == NULL) {
1973 device_printf(sc->sc_dev,
1974 "could not defragment mbuf\n");
1975 m_freem(m0);
1976 return ENOBUFS;
1977 }
1978 m0 = mnew;
1979
1980 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map,
1981 m0, segs, &nsegs, BUS_DMA_NOWAIT);
1982 if (error != 0) {
1983 device_printf(sc->sc_dev,
1984 "could not map mbuf (error %d)\n", error);
1985 m_freem(m0);
1986 return error;
1987 }
1988 }
1989
1990 data->m = m0;
1991 data->ni = ni;
1992
1993 DPRINTFN(WPI_DEBUG_TX, ("sending data: qid=%d idx=%d len=%d nsegs=%d\n",
1994 ring->qid, ring->cur, m0->m_pkthdr.len, nsegs));
1995
1996 /* first scatter/gather segment is used by the tx data command */
1997 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 |
1998 (1 + nsegs) << 24);
1999 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2000 ring->cur * sizeof (struct wpi_tx_cmd));
2001 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_data));
2002 for (i = 1; i <= nsegs; i++) {
2003 desc->segs[i].addr = htole32(segs[i - 1].ds_addr);
2004 desc->segs[i].len = htole32(segs[i - 1].ds_len);
2005 }
2006
2007 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
2008 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
2009 BUS_DMASYNC_PREWRITE);
2010
2011 ring->queued++;
2012
2013 /* kick ring */
2014 ring->cur = (ring->cur + 1) % WPI_TX_RING_COUNT;
2015 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2016
2017 return 0;
2018 }
2019
2020 /**
2021 * Process data waiting to be sent on the IFNET output queue
2022 */
2023 static void
wpi_start(struct ifnet * ifp)2024 wpi_start(struct ifnet *ifp)
2025 {
2026 struct wpi_softc *sc = ifp->if_softc;
2027
2028 WPI_LOCK(sc);
2029 wpi_start_locked(ifp);
2030 WPI_UNLOCK(sc);
2031 }
2032
2033 static void
wpi_start_locked(struct ifnet * ifp)2034 wpi_start_locked(struct ifnet *ifp)
2035 {
2036 struct wpi_softc *sc = ifp->if_softc;
2037 struct ieee80211_node *ni;
2038 struct mbuf *m;
2039 int ac;
2040
2041 WPI_LOCK_ASSERT(sc);
2042
2043 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2044 return;
2045
2046 for (;;) {
2047 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
2048 if (m == NULL)
2049 break;
2050 ac = M_WME_GETAC(m);
2051 if (sc->txq[ac].queued > sc->txq[ac].count - 8) {
2052 /* there is no place left in this ring */
2053 IFQ_DRV_PREPEND(&ifp->if_snd, m);
2054 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2055 break;
2056 }
2057 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
2058 if (wpi_tx_data(sc, m, ni, ac) != 0) {
2059 ieee80211_free_node(ni);
2060 ifp->if_oerrors++;
2061 break;
2062 }
2063 sc->sc_tx_timer = 5;
2064 }
2065 }
2066
2067 static int
wpi_raw_xmit(struct ieee80211_node * ni,struct mbuf * m,const struct ieee80211_bpf_params * params)2068 wpi_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2069 const struct ieee80211_bpf_params *params)
2070 {
2071 struct ieee80211com *ic = ni->ni_ic;
2072 struct ifnet *ifp = ic->ic_ifp;
2073 struct wpi_softc *sc = ifp->if_softc;
2074
2075 /* prevent management frames from being sent if we're not ready */
2076 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2077 m_freem(m);
2078 ieee80211_free_node(ni);
2079 return ENETDOWN;
2080 }
2081 WPI_LOCK(sc);
2082
2083 /* management frames go into ring 0 */
2084 if (sc->txq[0].queued > sc->txq[0].count - 8) {
2085 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2086 m_freem(m);
2087 WPI_UNLOCK(sc);
2088 ieee80211_free_node(ni);
2089 return ENOBUFS; /* XXX */
2090 }
2091
2092 ifp->if_opackets++;
2093 if (wpi_tx_data(sc, m, ni, 0) != 0)
2094 goto bad;
2095 sc->sc_tx_timer = 5;
2096 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
2097
2098 WPI_UNLOCK(sc);
2099 return 0;
2100 bad:
2101 ifp->if_oerrors++;
2102 WPI_UNLOCK(sc);
2103 ieee80211_free_node(ni);
2104 return EIO; /* XXX */
2105 }
2106
2107 static int
wpi_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)2108 wpi_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2109 {
2110 struct wpi_softc *sc = ifp->if_softc;
2111 struct ieee80211com *ic = ifp->if_l2com;
2112 struct ifreq *ifr = (struct ifreq *) data;
2113 int error = 0, startall = 0;
2114
2115 switch (cmd) {
2116 case SIOCSIFFLAGS:
2117 WPI_LOCK(sc);
2118 if ((ifp->if_flags & IFF_UP)) {
2119 if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2120 wpi_init_locked(sc, 0);
2121 startall = 1;
2122 }
2123 } else if ((ifp->if_drv_flags & IFF_DRV_RUNNING) ||
2124 (sc->flags & WPI_FLAG_HW_RADIO_OFF))
2125 wpi_stop_locked(sc);
2126 WPI_UNLOCK(sc);
2127 if (startall)
2128 ieee80211_start_all(ic);
2129 break;
2130 case SIOCGIFMEDIA:
2131 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2132 break;
2133 case SIOCGIFADDR:
2134 error = ether_ioctl(ifp, cmd, data);
2135 break;
2136 default:
2137 error = EINVAL;
2138 break;
2139 }
2140 return error;
2141 }
2142
2143 /*
2144 * Extract various information from EEPROM.
2145 */
2146 static void
wpi_read_eeprom(struct wpi_softc * sc,uint8_t macaddr[IEEE80211_ADDR_LEN])2147 wpi_read_eeprom(struct wpi_softc *sc, uint8_t macaddr[IEEE80211_ADDR_LEN])
2148 {
2149 int i;
2150
2151 /* read the hardware capabilities, revision and SKU type */
2152 wpi_read_prom_data(sc, WPI_EEPROM_CAPABILITIES, &sc->cap,1);
2153 wpi_read_prom_data(sc, WPI_EEPROM_REVISION, &sc->rev,2);
2154 wpi_read_prom_data(sc, WPI_EEPROM_TYPE, &sc->type, 1);
2155
2156 /* read the regulatory domain */
2157 wpi_read_prom_data(sc, WPI_EEPROM_DOMAIN, sc->domain, 4);
2158
2159 /* read in the hw MAC address */
2160 wpi_read_prom_data(sc, WPI_EEPROM_MAC, macaddr, 6);
2161
2162 /* read the list of authorized channels */
2163 for (i = 0; i < WPI_CHAN_BANDS_COUNT; i++)
2164 wpi_read_eeprom_channels(sc,i);
2165
2166 /* read the power level calibration info for each group */
2167 for (i = 0; i < WPI_POWER_GROUPS_COUNT; i++)
2168 wpi_read_eeprom_group(sc,i);
2169 }
2170
2171 /*
2172 * Send a command to the firmware.
2173 */
2174 static int
wpi_cmd(struct wpi_softc * sc,int code,const void * buf,int size,int async)2175 wpi_cmd(struct wpi_softc *sc, int code, const void *buf, int size, int async)
2176 {
2177 struct wpi_tx_ring *ring = &sc->cmdq;
2178 struct wpi_tx_desc *desc;
2179 struct wpi_tx_cmd *cmd;
2180
2181 #ifdef WPI_DEBUG
2182 if (!async) {
2183 WPI_LOCK_ASSERT(sc);
2184 }
2185 #endif
2186
2187 DPRINTFN(WPI_DEBUG_CMD,("wpi_cmd %d size %d async %d\n", code, size,
2188 async));
2189
2190 if (sc->flags & WPI_FLAG_BUSY) {
2191 device_printf(sc->sc_dev, "%s: cmd %d not sent, busy\n",
2192 __func__, code);
2193 return EAGAIN;
2194 }
2195 sc->flags|= WPI_FLAG_BUSY;
2196
2197 KASSERT(size <= sizeof cmd->data, ("command %d too large: %d bytes",
2198 code, size));
2199
2200 desc = &ring->desc[ring->cur];
2201 cmd = &ring->cmd[ring->cur];
2202
2203 cmd->code = code;
2204 cmd->flags = 0;
2205 cmd->qid = ring->qid;
2206 cmd->idx = ring->cur;
2207 memcpy(cmd->data, buf, size);
2208
2209 desc->flags = htole32(WPI_PAD32(size) << 28 | 1 << 24);
2210 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2211 ring->cur * sizeof (struct wpi_tx_cmd));
2212 desc->segs[0].len = htole32(4 + size);
2213
2214 /* kick cmd ring */
2215 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2216 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2217
2218 if (async) {
2219 sc->flags &= ~ WPI_FLAG_BUSY;
2220 return 0;
2221 }
2222
2223 return msleep(cmd, &sc->sc_mtx, PCATCH, "wpicmd", hz);
2224 }
2225
2226 static int
wpi_wme_update(struct ieee80211com * ic)2227 wpi_wme_update(struct ieee80211com *ic)
2228 {
2229 #define WPI_EXP2(v) htole16((1 << (v)) - 1)
2230 #define WPI_USEC(v) htole16(IEEE80211_TXOP_TO_US(v))
2231 struct wpi_softc *sc = ic->ic_ifp->if_softc;
2232 const struct wmeParams *wmep;
2233 struct wpi_wme_setup wme;
2234 int ac;
2235
2236 /* don't override default WME values if WME is not actually enabled */
2237 if (!(ic->ic_flags & IEEE80211_F_WME))
2238 return 0;
2239
2240 wme.flags = 0;
2241 for (ac = 0; ac < WME_NUM_AC; ac++) {
2242 wmep = &ic->ic_wme.wme_chanParams.cap_wmeParams[ac];
2243 wme.ac[ac].aifsn = wmep->wmep_aifsn;
2244 wme.ac[ac].cwmin = WPI_EXP2(wmep->wmep_logcwmin);
2245 wme.ac[ac].cwmax = WPI_EXP2(wmep->wmep_logcwmax);
2246 wme.ac[ac].txop = WPI_USEC(wmep->wmep_txopLimit);
2247
2248 DPRINTF(("setting WME for queue %d aifsn=%d cwmin=%d cwmax=%d "
2249 "txop=%d\n", ac, wme.ac[ac].aifsn, wme.ac[ac].cwmin,
2250 wme.ac[ac].cwmax, wme.ac[ac].txop));
2251 }
2252 return wpi_cmd(sc, WPI_CMD_SET_WME, &wme, sizeof wme, 1);
2253 #undef WPI_USEC
2254 #undef WPI_EXP2
2255 }
2256
2257 /*
2258 * Configure h/w multi-rate retries.
2259 */
2260 static int
wpi_mrr_setup(struct wpi_softc * sc)2261 wpi_mrr_setup(struct wpi_softc *sc)
2262 {
2263 struct ifnet *ifp = sc->sc_ifp;
2264 struct ieee80211com *ic = ifp->if_l2com;
2265 struct wpi_mrr_setup mrr;
2266 int i, error;
2267
2268 memset(&mrr, 0, sizeof (struct wpi_mrr_setup));
2269
2270 /* CCK rates (not used with 802.11a) */
2271 for (i = WPI_CCK1; i <= WPI_CCK11; i++) {
2272 mrr.rates[i].flags = 0;
2273 mrr.rates[i].signal = wpi_ridx_to_plcp[i];
2274 /* fallback to the immediate lower CCK rate (if any) */
2275 mrr.rates[i].next = (i == WPI_CCK1) ? WPI_CCK1 : i - 1;
2276 /* try one time at this rate before falling back to "next" */
2277 mrr.rates[i].ntries = 1;
2278 }
2279
2280 /* OFDM rates (not used with 802.11b) */
2281 for (i = WPI_OFDM6; i <= WPI_OFDM54; i++) {
2282 mrr.rates[i].flags = 0;
2283 mrr.rates[i].signal = wpi_ridx_to_plcp[i];
2284 /* fallback to the immediate lower OFDM rate (if any) */
2285 /* we allow fallback from OFDM/6 to CCK/2 in 11b/g mode */
2286 mrr.rates[i].next = (i == WPI_OFDM6) ?
2287 ((ic->ic_curmode == IEEE80211_MODE_11A) ?
2288 WPI_OFDM6 : WPI_CCK2) :
2289 i - 1;
2290 /* try one time at this rate before falling back to "next" */
2291 mrr.rates[i].ntries = 1;
2292 }
2293
2294 /* setup MRR for control frames */
2295 mrr.which = WPI_MRR_CTL;
2296 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0);
2297 if (error != 0) {
2298 device_printf(sc->sc_dev,
2299 "could not setup MRR for control frames\n");
2300 return error;
2301 }
2302
2303 /* setup MRR for data frames */
2304 mrr.which = WPI_MRR_DATA;
2305 error = wpi_cmd(sc, WPI_CMD_MRR_SETUP, &mrr, sizeof mrr, 0);
2306 if (error != 0) {
2307 device_printf(sc->sc_dev,
2308 "could not setup MRR for data frames\n");
2309 return error;
2310 }
2311
2312 return 0;
2313 }
2314
2315 static void
wpi_set_led(struct wpi_softc * sc,uint8_t which,uint8_t off,uint8_t on)2316 wpi_set_led(struct wpi_softc *sc, uint8_t which, uint8_t off, uint8_t on)
2317 {
2318 struct wpi_cmd_led led;
2319
2320 led.which = which;
2321 led.unit = htole32(100000); /* on/off in unit of 100ms */
2322 led.off = off;
2323 led.on = on;
2324
2325 (void)wpi_cmd(sc, WPI_CMD_SET_LED, &led, sizeof led, 1);
2326 }
2327
2328 static void
wpi_enable_tsf(struct wpi_softc * sc,struct ieee80211_node * ni)2329 wpi_enable_tsf(struct wpi_softc *sc, struct ieee80211_node *ni)
2330 {
2331 struct wpi_cmd_tsf tsf;
2332 uint64_t val, mod;
2333
2334 memset(&tsf, 0, sizeof tsf);
2335 memcpy(&tsf.tstamp, ni->ni_tstamp.data, 8);
2336 tsf.bintval = htole16(ni->ni_intval);
2337 tsf.lintval = htole16(10);
2338
2339 /* compute remaining time until next beacon */
2340 val = (uint64_t)ni->ni_intval * 1024; /* msec -> usec */
2341 mod = le64toh(tsf.tstamp) % val;
2342 tsf.binitval = htole32((uint32_t)(val - mod));
2343
2344 if (wpi_cmd(sc, WPI_CMD_TSF, &tsf, sizeof tsf, 1) != 0)
2345 device_printf(sc->sc_dev, "could not enable TSF\n");
2346 }
2347
2348 #if 0
2349 /*
2350 * Build a beacon frame that the firmware will broadcast periodically in
2351 * IBSS or HostAP modes.
2352 */
2353 static int
2354 wpi_setup_beacon(struct wpi_softc *sc, struct ieee80211_node *ni)
2355 {
2356 struct ifnet *ifp = sc->sc_ifp;
2357 struct ieee80211com *ic = ifp->if_l2com;
2358 struct wpi_tx_ring *ring = &sc->cmdq;
2359 struct wpi_tx_desc *desc;
2360 struct wpi_tx_data *data;
2361 struct wpi_tx_cmd *cmd;
2362 struct wpi_cmd_beacon *bcn;
2363 struct ieee80211_beacon_offsets bo;
2364 struct mbuf *m0;
2365 bus_addr_t physaddr;
2366 int error;
2367
2368 desc = &ring->desc[ring->cur];
2369 data = &ring->data[ring->cur];
2370
2371 m0 = ieee80211_beacon_alloc(ic, ni, &bo);
2372 if (m0 == NULL) {
2373 device_printf(sc->sc_dev, "could not allocate beacon frame\n");
2374 return ENOMEM;
2375 }
2376
2377 cmd = &ring->cmd[ring->cur];
2378 cmd->code = WPI_CMD_SET_BEACON;
2379 cmd->flags = 0;
2380 cmd->qid = ring->qid;
2381 cmd->idx = ring->cur;
2382
2383 bcn = (struct wpi_cmd_beacon *)cmd->data;
2384 memset(bcn, 0, sizeof (struct wpi_cmd_beacon));
2385 bcn->id = WPI_ID_BROADCAST;
2386 bcn->ofdm_mask = 0xff;
2387 bcn->cck_mask = 0x0f;
2388 bcn->lifetime = htole32(WPI_LIFETIME_INFINITE);
2389 bcn->len = htole16(m0->m_pkthdr.len);
2390 bcn->rate = (ic->ic_curmode == IEEE80211_MODE_11A) ?
2391 wpi_plcp_signal(12) : wpi_plcp_signal(2);
2392 bcn->flags = htole32(WPI_TX_AUTO_SEQ | WPI_TX_INSERT_TSTAMP);
2393
2394 /* save and trim IEEE802.11 header */
2395 m_copydata(m0, 0, sizeof (struct ieee80211_frame), (caddr_t)&bcn->wh);
2396 m_adj(m0, sizeof (struct ieee80211_frame));
2397
2398 /* assume beacon frame is contiguous */
2399 error = bus_dmamap_load(ring->data_dmat, data->map, mtod(m0, void *),
2400 m0->m_pkthdr.len, wpi_dma_map_addr, &physaddr, 0);
2401 if (error != 0) {
2402 device_printf(sc->sc_dev, "could not map beacon\n");
2403 m_freem(m0);
2404 return error;
2405 }
2406
2407 data->m = m0;
2408
2409 /* first scatter/gather segment is used by the beacon command */
2410 desc->flags = htole32(WPI_PAD32(m0->m_pkthdr.len) << 28 | 2 << 24);
2411 desc->segs[0].addr = htole32(ring->cmd_dma.paddr +
2412 ring->cur * sizeof (struct wpi_tx_cmd));
2413 desc->segs[0].len = htole32(4 + sizeof (struct wpi_cmd_beacon));
2414 desc->segs[1].addr = htole32(physaddr);
2415 desc->segs[1].len = htole32(m0->m_pkthdr.len);
2416
2417 /* kick cmd ring */
2418 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2419 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2420
2421 return 0;
2422 }
2423 #endif
2424
2425 static int
wpi_auth(struct wpi_softc * sc,struct ieee80211vap * vap)2426 wpi_auth(struct wpi_softc *sc, struct ieee80211vap *vap)
2427 {
2428 struct ieee80211com *ic = vap->iv_ic;
2429 struct ieee80211_node *ni = vap->iv_bss;
2430 struct wpi_node_info node;
2431 int error;
2432
2433
2434 /* update adapter's configuration */
2435 sc->config.associd = 0;
2436 sc->config.filter &= ~htole32(WPI_FILTER_BSS);
2437 IEEE80211_ADDR_COPY(sc->config.bssid, ni->ni_bssid);
2438 sc->config.chan = ieee80211_chan2ieee(ic, ni->ni_chan);
2439 if (IEEE80211_IS_CHAN_2GHZ(ni->ni_chan)) {
2440 sc->config.flags |= htole32(WPI_CONFIG_AUTO |
2441 WPI_CONFIG_24GHZ);
2442 } else {
2443 sc->config.flags &= ~htole32(WPI_CONFIG_AUTO |
2444 WPI_CONFIG_24GHZ);
2445 }
2446 if (IEEE80211_IS_CHAN_A(ni->ni_chan)) {
2447 sc->config.cck_mask = 0;
2448 sc->config.ofdm_mask = 0x15;
2449 } else if (IEEE80211_IS_CHAN_B(ni->ni_chan)) {
2450 sc->config.cck_mask = 0x03;
2451 sc->config.ofdm_mask = 0;
2452 } else {
2453 /* XXX assume 802.11b/g */
2454 sc->config.cck_mask = 0x0f;
2455 sc->config.ofdm_mask = 0x15;
2456 }
2457
2458 DPRINTF(("config chan %d flags %x cck %x ofdm %x\n", sc->config.chan,
2459 sc->config.flags, sc->config.cck_mask, sc->config.ofdm_mask));
2460 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
2461 sizeof (struct wpi_config), 1);
2462 if (error != 0) {
2463 device_printf(sc->sc_dev, "could not configure\n");
2464 return error;
2465 }
2466
2467 /* configuration has changed, set Tx power accordingly */
2468 if ((error = wpi_set_txpower(sc, ni->ni_chan, 1)) != 0) {
2469 device_printf(sc->sc_dev, "could not set Tx power\n");
2470 return error;
2471 }
2472
2473 /* add default node */
2474 memset(&node, 0, sizeof node);
2475 IEEE80211_ADDR_COPY(node.bssid, ni->ni_bssid);
2476 node.id = WPI_ID_BSS;
2477 node.rate = (ic->ic_curmode == IEEE80211_MODE_11A) ?
2478 wpi_plcp_signal(12) : wpi_plcp_signal(2);
2479 node.action = htole32(WPI_ACTION_SET_RATE);
2480 node.antenna = WPI_ANTENNA_BOTH;
2481 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 1);
2482 if (error != 0)
2483 device_printf(sc->sc_dev, "could not add BSS node\n");
2484
2485 return (error);
2486 }
2487
2488 static int
wpi_run(struct wpi_softc * sc,struct ieee80211vap * vap)2489 wpi_run(struct wpi_softc *sc, struct ieee80211vap *vap)
2490 {
2491 struct ieee80211com *ic = vap->iv_ic;
2492 struct ieee80211_node *ni = vap->iv_bss;
2493 int error;
2494
2495 if (vap->iv_opmode == IEEE80211_M_MONITOR) {
2496 /* link LED blinks while monitoring */
2497 wpi_set_led(sc, WPI_LED_LINK, 5, 5);
2498 return 0;
2499 }
2500
2501 wpi_enable_tsf(sc, ni);
2502
2503 /* update adapter's configuration */
2504 sc->config.associd = htole16(ni->ni_associd & ~0xc000);
2505 /* short preamble/slot time are negotiated when associating */
2506 sc->config.flags &= ~htole32(WPI_CONFIG_SHPREAMBLE |
2507 WPI_CONFIG_SHSLOT);
2508 if (ic->ic_flags & IEEE80211_F_SHSLOT)
2509 sc->config.flags |= htole32(WPI_CONFIG_SHSLOT);
2510 if (ic->ic_flags & IEEE80211_F_SHPREAMBLE)
2511 sc->config.flags |= htole32(WPI_CONFIG_SHPREAMBLE);
2512 sc->config.filter |= htole32(WPI_FILTER_BSS);
2513
2514 /* XXX put somewhere HC_QOS_SUPPORT_ASSOC + HC_IBSS_START */
2515
2516 DPRINTF(("config chan %d flags %x\n", sc->config.chan,
2517 sc->config.flags));
2518 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config, sizeof (struct
2519 wpi_config), 1);
2520 if (error != 0) {
2521 device_printf(sc->sc_dev, "could not update configuration\n");
2522 return error;
2523 }
2524
2525 error = wpi_set_txpower(sc, ni->ni_chan, 1);
2526 if (error != 0) {
2527 device_printf(sc->sc_dev, "could set txpower\n");
2528 return error;
2529 }
2530
2531 /* link LED always on while associated */
2532 wpi_set_led(sc, WPI_LED_LINK, 0, 1);
2533
2534 /* start automatic rate control timer */
2535 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc);
2536
2537 return (error);
2538 }
2539
2540 /*
2541 * Send a scan request to the firmware. Since this command is huge, we map it
2542 * into a mbufcluster instead of using the pre-allocated set of commands. Note,
2543 * much of this code is similar to that in wpi_cmd but because we must manually
2544 * construct the probe & channels, we duplicate what's needed here. XXX In the
2545 * future, this function should be modified to use wpi_cmd to help cleanup the
2546 * code base.
2547 */
2548 static int
wpi_scan(struct wpi_softc * sc)2549 wpi_scan(struct wpi_softc *sc)
2550 {
2551 struct ifnet *ifp = sc->sc_ifp;
2552 struct ieee80211com *ic = ifp->if_l2com;
2553 struct ieee80211_scan_state *ss = ic->ic_scan;
2554 struct wpi_tx_ring *ring = &sc->cmdq;
2555 struct wpi_tx_desc *desc;
2556 struct wpi_tx_data *data;
2557 struct wpi_tx_cmd *cmd;
2558 struct wpi_scan_hdr *hdr;
2559 struct wpi_scan_chan *chan;
2560 struct ieee80211_frame *wh;
2561 struct ieee80211_rateset *rs;
2562 struct ieee80211_channel *c;
2563 enum ieee80211_phymode mode;
2564 uint8_t *frm;
2565 int nrates, pktlen, error, i, nssid;
2566 bus_addr_t physaddr;
2567
2568 desc = &ring->desc[ring->cur];
2569 data = &ring->data[ring->cur];
2570
2571 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
2572 if (data->m == NULL) {
2573 device_printf(sc->sc_dev,
2574 "could not allocate mbuf for scan command\n");
2575 return ENOMEM;
2576 }
2577
2578 cmd = mtod(data->m, struct wpi_tx_cmd *);
2579 cmd->code = WPI_CMD_SCAN;
2580 cmd->flags = 0;
2581 cmd->qid = ring->qid;
2582 cmd->idx = ring->cur;
2583
2584 hdr = (struct wpi_scan_hdr *)cmd->data;
2585 memset(hdr, 0, sizeof(struct wpi_scan_hdr));
2586
2587 /*
2588 * Move to the next channel if no packets are received within 5 msecs
2589 * after sending the probe request (this helps to reduce the duration
2590 * of active scans).
2591 */
2592 hdr->quiet = htole16(5);
2593 hdr->threshold = htole16(1);
2594
2595 if (IEEE80211_IS_CHAN_A(ic->ic_curchan)) {
2596 /* send probe requests at 6Mbps */
2597 hdr->tx.rate = wpi_ridx_to_plcp[WPI_OFDM6];
2598
2599 /* Enable crc checking */
2600 hdr->promotion = htole16(1);
2601 } else {
2602 hdr->flags = htole32(WPI_CONFIG_24GHZ | WPI_CONFIG_AUTO);
2603 /* send probe requests at 1Mbps */
2604 hdr->tx.rate = wpi_ridx_to_plcp[WPI_CCK1];
2605 }
2606 hdr->tx.id = WPI_ID_BROADCAST;
2607 hdr->tx.lifetime = htole32(WPI_LIFETIME_INFINITE);
2608 hdr->tx.flags = htole32(WPI_TX_AUTO_SEQ);
2609
2610 memset(hdr->scan_essids, 0, sizeof(hdr->scan_essids));
2611 nssid = MIN(ss->ss_nssid, WPI_SCAN_MAX_ESSIDS);
2612 for (i = 0; i < nssid; i++) {
2613 hdr->scan_essids[i].id = IEEE80211_ELEMID_SSID;
2614 hdr->scan_essids[i].esslen = MIN(ss->ss_ssid[i].len, 32);
2615 memcpy(hdr->scan_essids[i].essid, ss->ss_ssid[i].ssid,
2616 hdr->scan_essids[i].esslen);
2617 #ifdef WPI_DEBUG
2618 if (wpi_debug & WPI_DEBUG_SCANNING) {
2619 printf("Scanning Essid: ");
2620 ieee80211_print_essid(hdr->scan_essids[i].essid,
2621 hdr->scan_essids[i].esslen);
2622 printf("\n");
2623 }
2624 #endif
2625 }
2626
2627 /*
2628 * Build a probe request frame. Most of the following code is a
2629 * copy & paste of what is done in net80211.
2630 */
2631 wh = (struct ieee80211_frame *)&hdr->scan_essids[4];
2632 wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
2633 IEEE80211_FC0_SUBTYPE_PROBE_REQ;
2634 wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2635 IEEE80211_ADDR_COPY(wh->i_addr1, ifp->if_broadcastaddr);
2636 IEEE80211_ADDR_COPY(wh->i_addr2, IF_LLADDR(ifp));
2637 IEEE80211_ADDR_COPY(wh->i_addr3, ifp->if_broadcastaddr);
2638 *(u_int16_t *)&wh->i_dur[0] = 0; /* filled by h/w */
2639 *(u_int16_t *)&wh->i_seq[0] = 0; /* filled by h/w */
2640
2641 frm = (uint8_t *)(wh + 1);
2642
2643 /* add essid IE, the hardware will fill this in for us */
2644 *frm++ = IEEE80211_ELEMID_SSID;
2645 *frm++ = 0;
2646
2647 mode = ieee80211_chan2mode(ic->ic_curchan);
2648 rs = &ic->ic_sup_rates[mode];
2649
2650 /* add supported rates IE */
2651 *frm++ = IEEE80211_ELEMID_RATES;
2652 nrates = rs->rs_nrates;
2653 if (nrates > IEEE80211_RATE_SIZE)
2654 nrates = IEEE80211_RATE_SIZE;
2655 *frm++ = nrates;
2656 memcpy(frm, rs->rs_rates, nrates);
2657 frm += nrates;
2658
2659 /* add supported xrates IE */
2660 if (rs->rs_nrates > IEEE80211_RATE_SIZE) {
2661 nrates = rs->rs_nrates - IEEE80211_RATE_SIZE;
2662 *frm++ = IEEE80211_ELEMID_XRATES;
2663 *frm++ = nrates;
2664 memcpy(frm, rs->rs_rates + IEEE80211_RATE_SIZE, nrates);
2665 frm += nrates;
2666 }
2667
2668 /* setup length of probe request */
2669 hdr->tx.len = htole16(frm - (uint8_t *)wh);
2670
2671 /*
2672 * Construct information about the channel that we
2673 * want to scan. The firmware expects this to be directly
2674 * after the scan probe request
2675 */
2676 c = ic->ic_curchan;
2677 chan = (struct wpi_scan_chan *)frm;
2678 chan->chan = ieee80211_chan2ieee(ic, c);
2679 chan->flags = 0;
2680 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) {
2681 chan->flags |= WPI_CHAN_ACTIVE;
2682 if (nssid != 0)
2683 chan->flags |= WPI_CHAN_DIRECT;
2684 }
2685 chan->gain_dsp = 0x6e; /* Default level */
2686 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2687 chan->active = htole16(10);
2688 chan->passive = htole16(ss->ss_maxdwell);
2689 chan->gain_radio = 0x3b;
2690 } else {
2691 chan->active = htole16(20);
2692 chan->passive = htole16(ss->ss_maxdwell);
2693 chan->gain_radio = 0x28;
2694 }
2695
2696 DPRINTFN(WPI_DEBUG_SCANNING,
2697 ("Scanning %u Passive: %d\n",
2698 chan->chan,
2699 c->ic_flags & IEEE80211_CHAN_PASSIVE));
2700
2701 hdr->nchan++;
2702 chan++;
2703
2704 frm += sizeof (struct wpi_scan_chan);
2705 #if 0
2706 // XXX All Channels....
2707 for (c = &ic->ic_channels[1];
2708 c <= &ic->ic_channels[IEEE80211_CHAN_MAX]; c++) {
2709 if ((c->ic_flags & ic->ic_curchan->ic_flags) != ic->ic_curchan->ic_flags)
2710 continue;
2711
2712 chan->chan = ieee80211_chan2ieee(ic, c);
2713 chan->flags = 0;
2714 if (!(c->ic_flags & IEEE80211_CHAN_PASSIVE)) {
2715 chan->flags |= WPI_CHAN_ACTIVE;
2716 if (ic->ic_des_ssid[0].len != 0)
2717 chan->flags |= WPI_CHAN_DIRECT;
2718 }
2719 chan->gain_dsp = 0x6e; /* Default level */
2720 if (IEEE80211_IS_CHAN_5GHZ(c)) {
2721 chan->active = htole16(10);
2722 chan->passive = htole16(110);
2723 chan->gain_radio = 0x3b;
2724 } else {
2725 chan->active = htole16(20);
2726 chan->passive = htole16(120);
2727 chan->gain_radio = 0x28;
2728 }
2729
2730 DPRINTFN(WPI_DEBUG_SCANNING,
2731 ("Scanning %u Passive: %d\n",
2732 chan->chan,
2733 c->ic_flags & IEEE80211_CHAN_PASSIVE));
2734
2735 hdr->nchan++;
2736 chan++;
2737
2738 frm += sizeof (struct wpi_scan_chan);
2739 }
2740 #endif
2741
2742 hdr->len = htole16(frm - (uint8_t *)hdr);
2743 pktlen = frm - (uint8_t *)cmd;
2744
2745 error = bus_dmamap_load(ring->data_dmat, data->map, cmd, pktlen,
2746 wpi_dma_map_addr, &physaddr, BUS_DMA_NOWAIT);
2747 if (error != 0) {
2748 device_printf(sc->sc_dev, "could not map scan command\n");
2749 m_freem(data->m);
2750 data->m = NULL;
2751 return error;
2752 }
2753
2754 desc->flags = htole32(WPI_PAD32(pktlen) << 28 | 1 << 24);
2755 desc->segs[0].addr = htole32(physaddr);
2756 desc->segs[0].len = htole32(pktlen);
2757
2758 bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
2759 BUS_DMASYNC_PREWRITE);
2760 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
2761
2762 /* kick cmd ring */
2763 ring->cur = (ring->cur + 1) % WPI_CMD_RING_COUNT;
2764 WPI_WRITE(sc, WPI_TX_WIDX, ring->qid << 8 | ring->cur);
2765
2766 sc->sc_scan_timer = 5;
2767 return 0; /* will be notified async. of failure/success */
2768 }
2769
2770 /**
2771 * Configure the card to listen to a particular channel, this transisions the
2772 * card in to being able to receive frames from remote devices.
2773 */
2774 static int
wpi_config(struct wpi_softc * sc)2775 wpi_config(struct wpi_softc *sc)
2776 {
2777 struct ifnet *ifp = sc->sc_ifp;
2778 struct ieee80211com *ic = ifp->if_l2com;
2779 struct wpi_power power;
2780 struct wpi_bluetooth bluetooth;
2781 struct wpi_node_info node;
2782 int error;
2783
2784 /* set power mode */
2785 memset(&power, 0, sizeof power);
2786 power.flags = htole32(WPI_POWER_CAM|0x8);
2787 error = wpi_cmd(sc, WPI_CMD_SET_POWER_MODE, &power, sizeof power, 0);
2788 if (error != 0) {
2789 device_printf(sc->sc_dev, "could not set power mode\n");
2790 return error;
2791 }
2792
2793 /* configure bluetooth coexistence */
2794 memset(&bluetooth, 0, sizeof bluetooth);
2795 bluetooth.flags = 3;
2796 bluetooth.lead = 0xaa;
2797 bluetooth.kill = 1;
2798 error = wpi_cmd(sc, WPI_CMD_BLUETOOTH, &bluetooth, sizeof bluetooth,
2799 0);
2800 if (error != 0) {
2801 device_printf(sc->sc_dev,
2802 "could not configure bluetooth coexistence\n");
2803 return error;
2804 }
2805
2806 /* configure adapter */
2807 memset(&sc->config, 0, sizeof (struct wpi_config));
2808 IEEE80211_ADDR_COPY(sc->config.myaddr, IF_LLADDR(ifp));
2809 /*set default channel*/
2810 sc->config.chan = htole16(ieee80211_chan2ieee(ic, ic->ic_curchan));
2811 sc->config.flags = htole32(WPI_CONFIG_TSF);
2812 if (IEEE80211_IS_CHAN_2GHZ(ic->ic_curchan)) {
2813 sc->config.flags |= htole32(WPI_CONFIG_AUTO |
2814 WPI_CONFIG_24GHZ);
2815 }
2816 sc->config.filter = 0;
2817 switch (ic->ic_opmode) {
2818 case IEEE80211_M_STA:
2819 case IEEE80211_M_WDS: /* No know setup, use STA for now */
2820 sc->config.mode = WPI_MODE_STA;
2821 sc->config.filter |= htole32(WPI_FILTER_MULTICAST);
2822 break;
2823 case IEEE80211_M_IBSS:
2824 case IEEE80211_M_AHDEMO:
2825 sc->config.mode = WPI_MODE_IBSS;
2826 sc->config.filter |= htole32(WPI_FILTER_BEACON |
2827 WPI_FILTER_MULTICAST);
2828 break;
2829 case IEEE80211_M_HOSTAP:
2830 sc->config.mode = WPI_MODE_HOSTAP;
2831 break;
2832 case IEEE80211_M_MONITOR:
2833 sc->config.mode = WPI_MODE_MONITOR;
2834 sc->config.filter |= htole32(WPI_FILTER_MULTICAST |
2835 WPI_FILTER_CTL | WPI_FILTER_PROMISC);
2836 break;
2837 default:
2838 device_printf(sc->sc_dev, "unknown opmode %d\n", ic->ic_opmode);
2839 return EINVAL;
2840 }
2841 sc->config.cck_mask = 0x0f; /* not yet negotiated */
2842 sc->config.ofdm_mask = 0xff; /* not yet negotiated */
2843 error = wpi_cmd(sc, WPI_CMD_CONFIGURE, &sc->config,
2844 sizeof (struct wpi_config), 0);
2845 if (error != 0) {
2846 device_printf(sc->sc_dev, "configure command failed\n");
2847 return error;
2848 }
2849
2850 /* configuration has changed, set Tx power accordingly */
2851 if ((error = wpi_set_txpower(sc, ic->ic_curchan, 0)) != 0) {
2852 device_printf(sc->sc_dev, "could not set Tx power\n");
2853 return error;
2854 }
2855
2856 /* add broadcast node */
2857 memset(&node, 0, sizeof node);
2858 IEEE80211_ADDR_COPY(node.bssid, ifp->if_broadcastaddr);
2859 node.id = WPI_ID_BROADCAST;
2860 node.rate = wpi_plcp_signal(2);
2861 error = wpi_cmd(sc, WPI_CMD_ADD_NODE, &node, sizeof node, 0);
2862 if (error != 0) {
2863 device_printf(sc->sc_dev, "could not add broadcast node\n");
2864 return error;
2865 }
2866
2867 /* Setup rate scalling */
2868 error = wpi_mrr_setup(sc);
2869 if (error != 0) {
2870 device_printf(sc->sc_dev, "could not setup MRR\n");
2871 return error;
2872 }
2873
2874 return 0;
2875 }
2876
2877 static void
wpi_stop_master(struct wpi_softc * sc)2878 wpi_stop_master(struct wpi_softc *sc)
2879 {
2880 uint32_t tmp;
2881 int ntries;
2882
2883 DPRINTFN(WPI_DEBUG_HW,("Disabling Firmware execution\n"));
2884
2885 tmp = WPI_READ(sc, WPI_RESET);
2886 WPI_WRITE(sc, WPI_RESET, tmp | WPI_STOP_MASTER | WPI_NEVO_RESET);
2887
2888 tmp = WPI_READ(sc, WPI_GPIO_CTL);
2889 if ((tmp & WPI_GPIO_PWR_STATUS) == WPI_GPIO_PWR_SLEEP)
2890 return; /* already asleep */
2891
2892 for (ntries = 0; ntries < 100; ntries++) {
2893 if (WPI_READ(sc, WPI_RESET) & WPI_MASTER_DISABLED)
2894 break;
2895 DELAY(10);
2896 }
2897 if (ntries == 100) {
2898 device_printf(sc->sc_dev, "timeout waiting for master\n");
2899 }
2900 }
2901
2902 static int
wpi_power_up(struct wpi_softc * sc)2903 wpi_power_up(struct wpi_softc *sc)
2904 {
2905 uint32_t tmp;
2906 int ntries;
2907
2908 wpi_mem_lock(sc);
2909 tmp = wpi_mem_read(sc, WPI_MEM_POWER);
2910 wpi_mem_write(sc, WPI_MEM_POWER, tmp & ~0x03000000);
2911 wpi_mem_unlock(sc);
2912
2913 for (ntries = 0; ntries < 5000; ntries++) {
2914 if (WPI_READ(sc, WPI_GPIO_STATUS) & WPI_POWERED)
2915 break;
2916 DELAY(10);
2917 }
2918 if (ntries == 5000) {
2919 device_printf(sc->sc_dev,
2920 "timeout waiting for NIC to power up\n");
2921 return ETIMEDOUT;
2922 }
2923 return 0;
2924 }
2925
2926 static int
wpi_reset(struct wpi_softc * sc)2927 wpi_reset(struct wpi_softc *sc)
2928 {
2929 uint32_t tmp;
2930 int ntries;
2931
2932 DPRINTFN(WPI_DEBUG_HW,
2933 ("Resetting the card - clearing any uploaded firmware\n"));
2934
2935 /* clear any pending interrupts */
2936 WPI_WRITE(sc, WPI_INTR, 0xffffffff);
2937
2938 tmp = WPI_READ(sc, WPI_PLL_CTL);
2939 WPI_WRITE(sc, WPI_PLL_CTL, tmp | WPI_PLL_INIT);
2940
2941 tmp = WPI_READ(sc, WPI_CHICKEN);
2942 WPI_WRITE(sc, WPI_CHICKEN, tmp | WPI_CHICKEN_RXNOLOS);
2943
2944 tmp = WPI_READ(sc, WPI_GPIO_CTL);
2945 WPI_WRITE(sc, WPI_GPIO_CTL, tmp | WPI_GPIO_INIT);
2946
2947 /* wait for clock stabilization */
2948 for (ntries = 0; ntries < 25000; ntries++) {
2949 if (WPI_READ(sc, WPI_GPIO_CTL) & WPI_GPIO_CLOCK)
2950 break;
2951 DELAY(10);
2952 }
2953 if (ntries == 25000) {
2954 device_printf(sc->sc_dev,
2955 "timeout waiting for clock stabilization\n");
2956 return ETIMEDOUT;
2957 }
2958
2959 /* initialize EEPROM */
2960 tmp = WPI_READ(sc, WPI_EEPROM_STATUS);
2961
2962 if ((tmp & WPI_EEPROM_VERSION) == 0) {
2963 device_printf(sc->sc_dev, "EEPROM not found\n");
2964 return EIO;
2965 }
2966 WPI_WRITE(sc, WPI_EEPROM_STATUS, tmp & ~WPI_EEPROM_LOCKED);
2967
2968 return 0;
2969 }
2970
2971 static void
wpi_hw_config(struct wpi_softc * sc)2972 wpi_hw_config(struct wpi_softc *sc)
2973 {
2974 uint32_t rev, hw;
2975
2976 /* voodoo from the Linux "driver".. */
2977 hw = WPI_READ(sc, WPI_HWCONFIG);
2978
2979 rev = pci_read_config(sc->sc_dev, PCIR_REVID, 1);
2980 if ((rev & 0xc0) == 0x40)
2981 hw |= WPI_HW_ALM_MB;
2982 else if (!(rev & 0x80))
2983 hw |= WPI_HW_ALM_MM;
2984
2985 if (sc->cap == 0x80)
2986 hw |= WPI_HW_SKU_MRC;
2987
2988 hw &= ~WPI_HW_REV_D;
2989 if ((le16toh(sc->rev) & 0xf0) == 0xd0)
2990 hw |= WPI_HW_REV_D;
2991
2992 if (sc->type > 1)
2993 hw |= WPI_HW_TYPE_B;
2994
2995 WPI_WRITE(sc, WPI_HWCONFIG, hw);
2996 }
2997
2998 static void
wpi_rfkill_resume(struct wpi_softc * sc)2999 wpi_rfkill_resume(struct wpi_softc *sc)
3000 {
3001 struct ifnet *ifp = sc->sc_ifp;
3002 struct ieee80211com *ic = ifp->if_l2com;
3003 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3004 int ntries;
3005
3006 /* enable firmware again */
3007 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3008 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD);
3009
3010 /* wait for thermal sensors to calibrate */
3011 for (ntries = 0; ntries < 1000; ntries++) {
3012 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0)
3013 break;
3014 DELAY(10);
3015 }
3016
3017 if (ntries == 1000) {
3018 device_printf(sc->sc_dev,
3019 "timeout waiting for thermal calibration\n");
3020 return;
3021 }
3022 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp));
3023
3024 if (wpi_config(sc) != 0) {
3025 device_printf(sc->sc_dev, "device config failed\n");
3026 return;
3027 }
3028
3029 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3030 ifp->if_drv_flags |= IFF_DRV_RUNNING;
3031 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF;
3032
3033 if (vap != NULL) {
3034 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
3035 if (vap->iv_opmode != IEEE80211_M_MONITOR) {
3036 ieee80211_beacon_miss(ic);
3037 wpi_set_led(sc, WPI_LED_LINK, 0, 1);
3038 } else
3039 wpi_set_led(sc, WPI_LED_LINK, 5, 5);
3040 } else {
3041 ieee80211_scan_next(vap);
3042 wpi_set_led(sc, WPI_LED_LINK, 20, 2);
3043 }
3044 }
3045
3046 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3047 }
3048
3049 static void
wpi_init_locked(struct wpi_softc * sc,int force)3050 wpi_init_locked(struct wpi_softc *sc, int force)
3051 {
3052 struct ifnet *ifp = sc->sc_ifp;
3053 uint32_t tmp;
3054 int ntries, qid;
3055
3056 wpi_stop_locked(sc);
3057 (void)wpi_reset(sc);
3058
3059 wpi_mem_lock(sc);
3060 wpi_mem_write(sc, WPI_MEM_CLOCK1, 0xa00);
3061 DELAY(20);
3062 tmp = wpi_mem_read(sc, WPI_MEM_PCIDEV);
3063 wpi_mem_write(sc, WPI_MEM_PCIDEV, tmp | 0x800);
3064 wpi_mem_unlock(sc);
3065
3066 (void)wpi_power_up(sc);
3067 wpi_hw_config(sc);
3068
3069 /* init Rx ring */
3070 wpi_mem_lock(sc);
3071 WPI_WRITE(sc, WPI_RX_BASE, sc->rxq.desc_dma.paddr);
3072 WPI_WRITE(sc, WPI_RX_RIDX_PTR, sc->shared_dma.paddr +
3073 offsetof(struct wpi_shared, next));
3074 WPI_WRITE(sc, WPI_RX_WIDX, (WPI_RX_RING_COUNT - 1) & ~7);
3075 WPI_WRITE(sc, WPI_RX_CONFIG, 0xa9601010);
3076 wpi_mem_unlock(sc);
3077
3078 /* init Tx rings */
3079 wpi_mem_lock(sc);
3080 wpi_mem_write(sc, WPI_MEM_MODE, 2); /* bypass mode */
3081 wpi_mem_write(sc, WPI_MEM_RA, 1); /* enable RA0 */
3082 wpi_mem_write(sc, WPI_MEM_TXCFG, 0x3f); /* enable all 6 Tx rings */
3083 wpi_mem_write(sc, WPI_MEM_BYPASS1, 0x10000);
3084 wpi_mem_write(sc, WPI_MEM_BYPASS2, 0x30002);
3085 wpi_mem_write(sc, WPI_MEM_MAGIC4, 4);
3086 wpi_mem_write(sc, WPI_MEM_MAGIC5, 5);
3087
3088 WPI_WRITE(sc, WPI_TX_BASE_PTR, sc->shared_dma.paddr);
3089 WPI_WRITE(sc, WPI_MSG_CONFIG, 0xffff05a5);
3090
3091 for (qid = 0; qid < 6; qid++) {
3092 WPI_WRITE(sc, WPI_TX_CTL(qid), 0);
3093 WPI_WRITE(sc, WPI_TX_BASE(qid), 0);
3094 WPI_WRITE(sc, WPI_TX_CONFIG(qid), 0x80200008);
3095 }
3096 wpi_mem_unlock(sc);
3097
3098 /* clear "radio off" and "disable command" bits (reversed logic) */
3099 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3100 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_DISABLE_CMD);
3101 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF;
3102
3103 /* clear any pending interrupts */
3104 WPI_WRITE(sc, WPI_INTR, 0xffffffff);
3105
3106 /* enable interrupts */
3107 WPI_WRITE(sc, WPI_MASK, WPI_INTR_MASK);
3108
3109 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3110 WPI_WRITE(sc, WPI_UCODE_CLR, WPI_RADIO_OFF);
3111
3112 if ((wpi_load_firmware(sc)) != 0) {
3113 device_printf(sc->sc_dev,
3114 "A problem occurred loading the firmware to the driver\n");
3115 return;
3116 }
3117
3118 /* At this point the firmware is up and running. If the hardware
3119 * RF switch is turned off thermal calibration will fail, though
3120 * the card is still happy to continue to accept commands, catch
3121 * this case and schedule a task to watch for it to be turned on.
3122 */
3123 wpi_mem_lock(sc);
3124 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF);
3125 wpi_mem_unlock(sc);
3126
3127 if (!(tmp & 0x1)) {
3128 sc->flags |= WPI_FLAG_HW_RADIO_OFF;
3129 device_printf(sc->sc_dev,"Radio Transmitter is switched off\n");
3130 goto out;
3131 }
3132
3133 /* wait for thermal sensors to calibrate */
3134 for (ntries = 0; ntries < 1000; ntries++) {
3135 if ((sc->temp = (int)WPI_READ(sc, WPI_TEMPERATURE)) != 0)
3136 break;
3137 DELAY(10);
3138 }
3139
3140 if (ntries == 1000) {
3141 device_printf(sc->sc_dev,
3142 "timeout waiting for thermal sensors calibration\n");
3143 return;
3144 }
3145 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d\n", sc->temp));
3146
3147 if (wpi_config(sc) != 0) {
3148 device_printf(sc->sc_dev, "device config failed\n");
3149 return;
3150 }
3151
3152 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
3153 ifp->if_drv_flags |= IFF_DRV_RUNNING;
3154 out:
3155 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3156 }
3157
3158 static void
wpi_init(void * arg)3159 wpi_init(void *arg)
3160 {
3161 struct wpi_softc *sc = arg;
3162 struct ifnet *ifp = sc->sc_ifp;
3163 struct ieee80211com *ic = ifp->if_l2com;
3164
3165 WPI_LOCK(sc);
3166 wpi_init_locked(sc, 0);
3167 WPI_UNLOCK(sc);
3168
3169 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3170 ieee80211_start_all(ic); /* start all vaps */
3171 }
3172
3173 static void
wpi_stop_locked(struct wpi_softc * sc)3174 wpi_stop_locked(struct wpi_softc *sc)
3175 {
3176 struct ifnet *ifp = sc->sc_ifp;
3177 uint32_t tmp;
3178 int ac;
3179
3180 sc->sc_tx_timer = 0;
3181 sc->sc_scan_timer = 0;
3182 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
3183 sc->flags &= ~WPI_FLAG_HW_RADIO_OFF;
3184 callout_stop(&sc->watchdog_to);
3185 callout_stop(&sc->calib_to);
3186
3187 /* disable interrupts */
3188 WPI_WRITE(sc, WPI_MASK, 0);
3189 WPI_WRITE(sc, WPI_INTR, WPI_INTR_MASK);
3190 WPI_WRITE(sc, WPI_INTR_STATUS, 0xff);
3191 WPI_WRITE(sc, WPI_INTR_STATUS, 0x00070000);
3192
3193 wpi_mem_lock(sc);
3194 wpi_mem_write(sc, WPI_MEM_MODE, 0);
3195 wpi_mem_unlock(sc);
3196
3197 /* reset all Tx rings */
3198 for (ac = 0; ac < 4; ac++)
3199 wpi_reset_tx_ring(sc, &sc->txq[ac]);
3200 wpi_reset_tx_ring(sc, &sc->cmdq);
3201
3202 /* reset Rx ring */
3203 wpi_reset_rx_ring(sc, &sc->rxq);
3204
3205 wpi_mem_lock(sc);
3206 wpi_mem_write(sc, WPI_MEM_CLOCK2, 0x200);
3207 wpi_mem_unlock(sc);
3208
3209 DELAY(5);
3210
3211 wpi_stop_master(sc);
3212
3213 tmp = WPI_READ(sc, WPI_RESET);
3214 WPI_WRITE(sc, WPI_RESET, tmp | WPI_SW_RESET);
3215 sc->flags &= ~WPI_FLAG_BUSY;
3216 }
3217
3218 static void
wpi_stop(struct wpi_softc * sc)3219 wpi_stop(struct wpi_softc *sc)
3220 {
3221 WPI_LOCK(sc);
3222 wpi_stop_locked(sc);
3223 WPI_UNLOCK(sc);
3224 }
3225
3226 static void
wpi_calib_timeout(void * arg)3227 wpi_calib_timeout(void *arg)
3228 {
3229 struct wpi_softc *sc = arg;
3230 struct ifnet *ifp = sc->sc_ifp;
3231 struct ieee80211com *ic = ifp->if_l2com;
3232 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3233 int temp;
3234
3235 if (vap->iv_state != IEEE80211_S_RUN)
3236 return;
3237
3238 /* update sensor data */
3239 temp = (int)WPI_READ(sc, WPI_TEMPERATURE);
3240 DPRINTFN(WPI_DEBUG_TEMP,("Temp in calibration is: %d\n", temp));
3241
3242 wpi_power_calibration(sc, temp);
3243
3244 callout_reset(&sc->calib_to, 60*hz, wpi_calib_timeout, sc);
3245 }
3246
3247 /*
3248 * This function is called periodically (every 60 seconds) to adjust output
3249 * power to temperature changes.
3250 */
3251 static void
wpi_power_calibration(struct wpi_softc * sc,int temp)3252 wpi_power_calibration(struct wpi_softc *sc, int temp)
3253 {
3254 struct ifnet *ifp = sc->sc_ifp;
3255 struct ieee80211com *ic = ifp->if_l2com;
3256 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3257
3258 /* sanity-check read value */
3259 if (temp < -260 || temp > 25) {
3260 /* this can't be correct, ignore */
3261 DPRINTFN(WPI_DEBUG_TEMP,
3262 ("out-of-range temperature reported: %d\n", temp));
3263 return;
3264 }
3265
3266 DPRINTFN(WPI_DEBUG_TEMP,("temperature %d->%d\n", sc->temp, temp));
3267
3268 /* adjust Tx power if need be */
3269 if (abs(temp - sc->temp) <= 6)
3270 return;
3271
3272 sc->temp = temp;
3273
3274 if (wpi_set_txpower(sc, vap->iv_bss->ni_chan, 1) != 0) {
3275 /* just warn, too bad for the automatic calibration... */
3276 device_printf(sc->sc_dev,"could not adjust Tx power\n");
3277 }
3278 }
3279
3280 /**
3281 * Read the eeprom to find out what channels are valid for the given
3282 * band and update net80211 with what we find.
3283 */
3284 static void
wpi_read_eeprom_channels(struct wpi_softc * sc,int n)3285 wpi_read_eeprom_channels(struct wpi_softc *sc, int n)
3286 {
3287 struct ifnet *ifp = sc->sc_ifp;
3288 struct ieee80211com *ic = ifp->if_l2com;
3289 const struct wpi_chan_band *band = &wpi_bands[n];
3290 struct wpi_eeprom_chan channels[WPI_MAX_CHAN_PER_BAND];
3291 struct ieee80211_channel *c;
3292 int chan, i, passive;
3293
3294 wpi_read_prom_data(sc, band->addr, channels,
3295 band->nchan * sizeof (struct wpi_eeprom_chan));
3296
3297 for (i = 0; i < band->nchan; i++) {
3298 if (!(channels[i].flags & WPI_EEPROM_CHAN_VALID)) {
3299 DPRINTFN(WPI_DEBUG_HW,
3300 ("Channel Not Valid: %d, band %d\n",
3301 band->chan[i],n));
3302 continue;
3303 }
3304
3305 passive = 0;
3306 chan = band->chan[i];
3307 c = &ic->ic_channels[ic->ic_nchans++];
3308
3309 /* is active scan allowed on this channel? */
3310 if (!(channels[i].flags & WPI_EEPROM_CHAN_ACTIVE)) {
3311 passive = IEEE80211_CHAN_PASSIVE;
3312 }
3313
3314 if (n == 0) { /* 2GHz band */
3315 c->ic_ieee = chan;
3316 c->ic_freq = ieee80211_ieee2mhz(chan,
3317 IEEE80211_CHAN_2GHZ);
3318 c->ic_flags = IEEE80211_CHAN_B | passive;
3319
3320 c = &ic->ic_channels[ic->ic_nchans++];
3321 c->ic_ieee = chan;
3322 c->ic_freq = ieee80211_ieee2mhz(chan,
3323 IEEE80211_CHAN_2GHZ);
3324 c->ic_flags = IEEE80211_CHAN_G | passive;
3325
3326 } else { /* 5GHz band */
3327 /*
3328 * Some 3945ABG adapters support channels 7, 8, 11
3329 * and 12 in the 2GHz *and* 5GHz bands.
3330 * Because of limitations in our net80211(9) stack,
3331 * we can't support these channels in 5GHz band.
3332 * XXX not true; just need to map to proper frequency
3333 */
3334 if (chan <= 14)
3335 continue;
3336
3337 c->ic_ieee = chan;
3338 c->ic_freq = ieee80211_ieee2mhz(chan,
3339 IEEE80211_CHAN_5GHZ);
3340 c->ic_flags = IEEE80211_CHAN_A | passive;
3341 }
3342
3343 /* save maximum allowed power for this channel */
3344 sc->maxpwr[chan] = channels[i].maxpwr;
3345
3346 #if 0
3347 // XXX We can probably use this an get rid of maxpwr - ben 20070617
3348 ic->ic_channels[chan].ic_maxpower = channels[i].maxpwr;
3349 //ic->ic_channels[chan].ic_minpower...
3350 //ic->ic_channels[chan].ic_maxregtxpower...
3351 #endif
3352
3353 DPRINTF(("adding chan %d (%dMHz) flags=0x%x maxpwr=%d"
3354 " passive=%d, offset %d\n", chan, c->ic_freq,
3355 channels[i].flags, sc->maxpwr[chan],
3356 (c->ic_flags & IEEE80211_CHAN_PASSIVE) != 0,
3357 ic->ic_nchans));
3358 }
3359 }
3360
3361 static void
wpi_read_eeprom_group(struct wpi_softc * sc,int n)3362 wpi_read_eeprom_group(struct wpi_softc *sc, int n)
3363 {
3364 struct wpi_power_group *group = &sc->groups[n];
3365 struct wpi_eeprom_group rgroup;
3366 int i;
3367
3368 wpi_read_prom_data(sc, WPI_EEPROM_POWER_GRP + n * 32, &rgroup,
3369 sizeof rgroup);
3370
3371 /* save power group information */
3372 group->chan = rgroup.chan;
3373 group->maxpwr = rgroup.maxpwr;
3374 /* temperature at which the samples were taken */
3375 group->temp = (int16_t)le16toh(rgroup.temp);
3376
3377 DPRINTF(("power group %d: chan=%d maxpwr=%d temp=%d\n", n,
3378 group->chan, group->maxpwr, group->temp));
3379
3380 for (i = 0; i < WPI_SAMPLES_COUNT; i++) {
3381 group->samples[i].index = rgroup.samples[i].index;
3382 group->samples[i].power = rgroup.samples[i].power;
3383
3384 DPRINTF(("\tsample %d: index=%d power=%d\n", i,
3385 group->samples[i].index, group->samples[i].power));
3386 }
3387 }
3388
3389 /*
3390 * Update Tx power to match what is defined for channel `c'.
3391 */
3392 static int
wpi_set_txpower(struct wpi_softc * sc,struct ieee80211_channel * c,int async)3393 wpi_set_txpower(struct wpi_softc *sc, struct ieee80211_channel *c, int async)
3394 {
3395 struct ifnet *ifp = sc->sc_ifp;
3396 struct ieee80211com *ic = ifp->if_l2com;
3397 struct wpi_power_group *group;
3398 struct wpi_cmd_txpower txpower;
3399 u_int chan;
3400 int i;
3401
3402 /* get channel number */
3403 chan = ieee80211_chan2ieee(ic, c);
3404
3405 /* find the power group to which this channel belongs */
3406 if (IEEE80211_IS_CHAN_5GHZ(c)) {
3407 for (group = &sc->groups[1]; group < &sc->groups[4]; group++)
3408 if (chan <= group->chan)
3409 break;
3410 } else
3411 group = &sc->groups[0];
3412
3413 memset(&txpower, 0, sizeof txpower);
3414 txpower.band = IEEE80211_IS_CHAN_5GHZ(c) ? 0 : 1;
3415 txpower.channel = htole16(chan);
3416
3417 /* set Tx power for all OFDM and CCK rates */
3418 for (i = 0; i <= 11 ; i++) {
3419 /* retrieve Tx power for this channel/rate combination */
3420 int idx = wpi_get_power_index(sc, group, c,
3421 wpi_ridx_to_rate[i]);
3422
3423 txpower.rates[i].rate = wpi_ridx_to_plcp[i];
3424
3425 if (IEEE80211_IS_CHAN_5GHZ(c)) {
3426 txpower.rates[i].gain_radio = wpi_rf_gain_5ghz[idx];
3427 txpower.rates[i].gain_dsp = wpi_dsp_gain_5ghz[idx];
3428 } else {
3429 txpower.rates[i].gain_radio = wpi_rf_gain_2ghz[idx];
3430 txpower.rates[i].gain_dsp = wpi_dsp_gain_2ghz[idx];
3431 }
3432 DPRINTFN(WPI_DEBUG_TEMP,("chan %d/rate %d: power index %d\n",
3433 chan, wpi_ridx_to_rate[i], idx));
3434 }
3435
3436 return wpi_cmd(sc, WPI_CMD_TXPOWER, &txpower, sizeof txpower, async);
3437 }
3438
3439 /*
3440 * Determine Tx power index for a given channel/rate combination.
3441 * This takes into account the regulatory information from EEPROM and the
3442 * current temperature.
3443 */
3444 static int
wpi_get_power_index(struct wpi_softc * sc,struct wpi_power_group * group,struct ieee80211_channel * c,int rate)3445 wpi_get_power_index(struct wpi_softc *sc, struct wpi_power_group *group,
3446 struct ieee80211_channel *c, int rate)
3447 {
3448 /* fixed-point arithmetic division using a n-bit fractional part */
3449 #define fdivround(a, b, n) \
3450 ((((1 << n) * (a)) / (b) + (1 << n) / 2) / (1 << n))
3451
3452 /* linear interpolation */
3453 #define interpolate(x, x1, y1, x2, y2, n) \
3454 ((y1) + fdivround(((x) - (x1)) * ((y2) - (y1)), (x2) - (x1), n))
3455
3456 struct ifnet *ifp = sc->sc_ifp;
3457 struct ieee80211com *ic = ifp->if_l2com;
3458 struct wpi_power_sample *sample;
3459 int pwr, idx;
3460 u_int chan;
3461
3462 /* get channel number */
3463 chan = ieee80211_chan2ieee(ic, c);
3464
3465 /* default power is group's maximum power - 3dB */
3466 pwr = group->maxpwr / 2;
3467
3468 /* decrease power for highest OFDM rates to reduce distortion */
3469 switch (rate) {
3470 case 72: /* 36Mb/s */
3471 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 0 : 5;
3472 break;
3473 case 96: /* 48Mb/s */
3474 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 7 : 10;
3475 break;
3476 case 108: /* 54Mb/s */
3477 pwr -= IEEE80211_IS_CHAN_2GHZ(c) ? 9 : 12;
3478 break;
3479 }
3480
3481 /* never exceed channel's maximum allowed Tx power */
3482 pwr = min(pwr, sc->maxpwr[chan]);
3483
3484 /* retrieve power index into gain tables from samples */
3485 for (sample = group->samples; sample < &group->samples[3]; sample++)
3486 if (pwr > sample[1].power)
3487 break;
3488 /* fixed-point linear interpolation using a 19-bit fractional part */
3489 idx = interpolate(pwr, sample[0].power, sample[0].index,
3490 sample[1].power, sample[1].index, 19);
3491
3492 /*
3493 * Adjust power index based on current temperature
3494 * - if colder than factory-calibrated: decreate output power
3495 * - if warmer than factory-calibrated: increase output power
3496 */
3497 idx -= (sc->temp - group->temp) * 11 / 100;
3498
3499 /* decrease power for CCK rates (-5dB) */
3500 if (!WPI_RATE_IS_OFDM(rate))
3501 idx += 10;
3502
3503 /* keep power index in a valid range */
3504 if (idx < 0)
3505 return 0;
3506 if (idx > WPI_MAX_PWR_INDEX)
3507 return WPI_MAX_PWR_INDEX;
3508 return idx;
3509
3510 #undef interpolate
3511 #undef fdivround
3512 }
3513
3514 /**
3515 * Called by net80211 framework to indicate that a scan
3516 * is starting. This function doesn't actually do the scan,
3517 * wpi_scan_curchan starts things off. This function is more
3518 * of an early warning from the framework we should get ready
3519 * for the scan.
3520 */
3521 static void
wpi_scan_start(struct ieee80211com * ic)3522 wpi_scan_start(struct ieee80211com *ic)
3523 {
3524 struct ifnet *ifp = ic->ic_ifp;
3525 struct wpi_softc *sc = ifp->if_softc;
3526
3527 WPI_LOCK(sc);
3528 wpi_set_led(sc, WPI_LED_LINK, 20, 2);
3529 WPI_UNLOCK(sc);
3530 }
3531
3532 /**
3533 * Called by the net80211 framework, indicates that the
3534 * scan has ended. If there is a scan in progress on the card
3535 * then it should be aborted.
3536 */
3537 static void
wpi_scan_end(struct ieee80211com * ic)3538 wpi_scan_end(struct ieee80211com *ic)
3539 {
3540 /* XXX ignore */
3541 }
3542
3543 /**
3544 * Called by the net80211 framework to indicate to the driver
3545 * that the channel should be changed
3546 */
3547 static void
wpi_set_channel(struct ieee80211com * ic)3548 wpi_set_channel(struct ieee80211com *ic)
3549 {
3550 struct ifnet *ifp = ic->ic_ifp;
3551 struct wpi_softc *sc = ifp->if_softc;
3552 int error;
3553
3554 /*
3555 * Only need to set the channel in Monitor mode. AP scanning and auth
3556 * are already taken care of by their respective firmware commands.
3557 */
3558 if (ic->ic_opmode == IEEE80211_M_MONITOR) {
3559 WPI_LOCK(sc);
3560 error = wpi_config(sc);
3561 WPI_UNLOCK(sc);
3562 if (error != 0)
3563 device_printf(sc->sc_dev,
3564 "error %d settting channel\n", error);
3565 }
3566 }
3567
3568 /**
3569 * Called by net80211 to indicate that we need to scan the current
3570 * channel. The channel is previously be set via the wpi_set_channel
3571 * callback.
3572 */
3573 static void
wpi_scan_curchan(struct ieee80211_scan_state * ss,unsigned long maxdwell)3574 wpi_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
3575 {
3576 struct ieee80211vap *vap = ss->ss_vap;
3577 struct ifnet *ifp = vap->iv_ic->ic_ifp;
3578 struct wpi_softc *sc = ifp->if_softc;
3579
3580 WPI_LOCK(sc);
3581 if (wpi_scan(sc))
3582 ieee80211_cancel_scan(vap);
3583 WPI_UNLOCK(sc);
3584 }
3585
3586 /**
3587 * Called by the net80211 framework to indicate
3588 * the minimum dwell time has been met, terminate the scan.
3589 * We don't actually terminate the scan as the firmware will notify
3590 * us when it's finished and we have no way to interrupt it.
3591 */
3592 static void
wpi_scan_mindwell(struct ieee80211_scan_state * ss)3593 wpi_scan_mindwell(struct ieee80211_scan_state *ss)
3594 {
3595 /* NB: don't try to abort scan; wait for firmware to finish */
3596 }
3597
3598 static void
wpi_hwreset(void * arg,int pending)3599 wpi_hwreset(void *arg, int pending)
3600 {
3601 struct wpi_softc *sc = arg;
3602
3603 WPI_LOCK(sc);
3604 wpi_init_locked(sc, 0);
3605 WPI_UNLOCK(sc);
3606 }
3607
3608 static void
wpi_rfreset(void * arg,int pending)3609 wpi_rfreset(void *arg, int pending)
3610 {
3611 struct wpi_softc *sc = arg;
3612
3613 WPI_LOCK(sc);
3614 wpi_rfkill_resume(sc);
3615 WPI_UNLOCK(sc);
3616 }
3617
3618 /*
3619 * Allocate DMA-safe memory for firmware transfer.
3620 */
3621 static int
wpi_alloc_fwmem(struct wpi_softc * sc)3622 wpi_alloc_fwmem(struct wpi_softc *sc)
3623 {
3624 /* allocate enough contiguous space to store text and data */
3625 return wpi_dma_contig_alloc(sc, &sc->fw_dma, NULL,
3626 WPI_FW_MAIN_TEXT_MAXSZ + WPI_FW_MAIN_DATA_MAXSZ, 1,
3627 BUS_DMA_NOWAIT);
3628 }
3629
3630 static void
wpi_free_fwmem(struct wpi_softc * sc)3631 wpi_free_fwmem(struct wpi_softc *sc)
3632 {
3633 wpi_dma_contig_free(&sc->fw_dma);
3634 }
3635
3636 /**
3637 * Called every second, wpi_watchdog used by the watch dog timer
3638 * to check that the card is still alive
3639 */
3640 static void
wpi_watchdog(void * arg)3641 wpi_watchdog(void *arg)
3642 {
3643 struct wpi_softc *sc = arg;
3644 struct ifnet *ifp = sc->sc_ifp;
3645 struct ieee80211com *ic = ifp->if_l2com;
3646 uint32_t tmp;
3647
3648 DPRINTFN(WPI_DEBUG_WATCHDOG,("Watchdog: tick\n"));
3649
3650 if (sc->flags & WPI_FLAG_HW_RADIO_OFF) {
3651 /* No need to lock firmware memory */
3652 tmp = wpi_mem_read(sc, WPI_MEM_HW_RADIO_OFF);
3653
3654 if ((tmp & 0x1) == 0) {
3655 /* Radio kill switch is still off */
3656 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3657 return;
3658 }
3659
3660 device_printf(sc->sc_dev, "Hardware Switch Enabled\n");
3661 ieee80211_runtask(ic, &sc->sc_radiotask);
3662 return;
3663 }
3664
3665 if (sc->sc_tx_timer > 0) {
3666 if (--sc->sc_tx_timer == 0) {
3667 device_printf(sc->sc_dev,"device timeout\n");
3668 ifp->if_oerrors++;
3669 ieee80211_runtask(ic, &sc->sc_restarttask);
3670 }
3671 }
3672 if (sc->sc_scan_timer > 0) {
3673 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3674 if (--sc->sc_scan_timer == 0 && vap != NULL) {
3675 device_printf(sc->sc_dev,"scan timeout\n");
3676 ieee80211_cancel_scan(vap);
3677 ieee80211_runtask(ic, &sc->sc_restarttask);
3678 }
3679 }
3680
3681 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
3682 callout_reset(&sc->watchdog_to, hz, wpi_watchdog, sc);
3683 }
3684
3685 #ifdef WPI_DEBUG
wpi_cmd_str(int cmd)3686 static const char *wpi_cmd_str(int cmd)
3687 {
3688 switch (cmd) {
3689 case WPI_DISABLE_CMD: return "WPI_DISABLE_CMD";
3690 case WPI_CMD_CONFIGURE: return "WPI_CMD_CONFIGURE";
3691 case WPI_CMD_ASSOCIATE: return "WPI_CMD_ASSOCIATE";
3692 case WPI_CMD_SET_WME: return "WPI_CMD_SET_WME";
3693 case WPI_CMD_TSF: return "WPI_CMD_TSF";
3694 case WPI_CMD_ADD_NODE: return "WPI_CMD_ADD_NODE";
3695 case WPI_CMD_TX_DATA: return "WPI_CMD_TX_DATA";
3696 case WPI_CMD_MRR_SETUP: return "WPI_CMD_MRR_SETUP";
3697 case WPI_CMD_SET_LED: return "WPI_CMD_SET_LED";
3698 case WPI_CMD_SET_POWER_MODE: return "WPI_CMD_SET_POWER_MODE";
3699 case WPI_CMD_SCAN: return "WPI_CMD_SCAN";
3700 case WPI_CMD_SET_BEACON:return "WPI_CMD_SET_BEACON";
3701 case WPI_CMD_TXPOWER: return "WPI_CMD_TXPOWER";
3702 case WPI_CMD_BLUETOOTH: return "WPI_CMD_BLUETOOTH";
3703
3704 default:
3705 KASSERT(1, ("Unknown Command: %d\n", cmd));
3706 return "UNKNOWN CMD"; /* Make the compiler happy */
3707 }
3708 }
3709 #endif
3710
3711 MODULE_DEPEND(wpi, pci, 1, 1, 1);
3712 MODULE_DEPEND(wpi, wlan, 1, 1, 1);
3713 MODULE_DEPEND(wpi, firmware, 1, 1, 1);
3714