1 /* $FreeBSD: head/sys/dev/ral/rt2560.c 195618 2009-07-11 15:02:45Z rpaulo $ */
2
3 /*-
4 * Copyright (c) 2005, 2006
5 * Damien Bergamini <damien.bergamini@free.fr>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 *
19 * $FreeBSD: head/sys/dev/ral/rt2560.c 195618 2009-07-11 15:02:45Z rpaulo $
20 */
21
22
23 /*-
24 * Ralink Technology RT2560 chipset driver
25 * http://www.ralinktech.com/
26 */
27
28 #include <sys/param.h>
29 #include <sys/sysctl.h>
30 #include <sys/sockio.h>
31 #include <sys/mbuf.h>
32 #include <sys/kernel.h>
33 #include <sys/socket.h>
34 #include <sys/systm.h>
35 #include <sys/malloc.h>
36 #include <sys/lock.h>
37 #include <sys/mutex.h>
38 #include <sys/module.h>
39 #include <sys/bus.h>
40 #include <sys/endian.h>
41 #include <sys/rman.h>
42
43 #include <net/bpf.h>
44 #include <net/if.h>
45 #include <net/if_arp.h>
46 #include <net/ethernet.h>
47 #include <net/if_dl.h>
48 #include <net/if_media.h>
49 #include <net/if_types.h>
50 #include <net/ifq_var.h>
51
52 #include <netproto/802_11/ieee80211_var.h>
53 #include <netproto/802_11/ieee80211_radiotap.h>
54 #include <netproto/802_11/ieee80211_regdomain.h>
55 #include <netproto/802_11/ieee80211_ratectl.h>
56
57 #include <netinet/in.h>
58 #include <netinet/in_systm.h>
59 #include <netinet/in_var.h>
60 #include <netinet/ip.h>
61 #include <netinet/if_ether.h>
62
63 #include <dev/netif/ral/rt2560reg.h>
64 #include <dev/netif/ral/rt2560var.h>
65
66 #define RT2560_RSSI(sc, rssi) \
67 ((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ? \
68 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0)
69
70 #define RAL_DEBUG
71 #ifdef RAL_DEBUG
72 #define DPRINTF(sc, fmt, ...) do { \
73 if (sc->sc_debug > 0) \
74 kprintf(fmt, __VA_ARGS__); \
75 } while (0)
76 #define DPRINTFN(sc, n, fmt, ...) do { \
77 if (sc->sc_debug >= (n)) \
78 kprintf(fmt, __VA_ARGS__); \
79 } while (0)
80 #else
81 #define DPRINTF(sc, fmt, ...)
82 #define DPRINTFN(sc, n, fmt, ...)
83 #endif
84
85 static struct ieee80211vap *rt2560_vap_create(struct ieee80211com *,
86 const char name[IFNAMSIZ], int unit,
87 enum ieee80211_opmode opmode,
88 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN],
89 const uint8_t mac[IEEE80211_ADDR_LEN]);
90 static void rt2560_vap_delete(struct ieee80211vap *);
91 static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int,
92 int);
93 static int rt2560_alloc_tx_ring(struct rt2560_softc *,
94 struct rt2560_tx_ring *, int);
95 static void rt2560_reset_tx_ring(struct rt2560_softc *,
96 struct rt2560_tx_ring *);
97 static void rt2560_free_tx_ring(struct rt2560_softc *,
98 struct rt2560_tx_ring *);
99 static int rt2560_alloc_rx_ring(struct rt2560_softc *,
100 struct rt2560_rx_ring *, int);
101 static void rt2560_reset_rx_ring(struct rt2560_softc *,
102 struct rt2560_rx_ring *);
103 static void rt2560_free_rx_ring(struct rt2560_softc *,
104 struct rt2560_rx_ring *);
105 static int rt2560_newstate(struct ieee80211vap *,
106 enum ieee80211_state, int);
107 static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t);
108 static void rt2560_encryption_intr(struct rt2560_softc *);
109 static void rt2560_tx_intr(struct rt2560_softc *);
110 static void rt2560_prio_intr(struct rt2560_softc *);
111 static void rt2560_decryption_intr(struct rt2560_softc *);
112 static void rt2560_rx_intr(struct rt2560_softc *);
113 static void rt2560_beacon_update(struct ieee80211vap *, int item);
114 static void rt2560_beacon_expire(struct rt2560_softc *);
115 static void rt2560_wakeup_expire(struct rt2560_softc *);
116 static void rt2560_scan_start(struct ieee80211com *);
117 static void rt2560_scan_end(struct ieee80211com *);
118 static void rt2560_set_channel(struct ieee80211com *);
119 static void rt2560_setup_tx_desc(struct rt2560_softc *,
120 struct rt2560_tx_desc *, uint32_t, int, int, int,
121 bus_addr_t);
122 static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *,
123 struct ieee80211_node *);
124 static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *,
125 struct ieee80211_node *);
126 static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *,
127 struct ieee80211_node *);
128 static void rt2560_start_locked(struct ifnet *);
129 static void rt2560_start(struct ifnet *, struct ifaltq_subque *);
130 static void rt2560_watchdog_callout(void *);
131 static int rt2560_ioctl(struct ifnet *, u_long, caddr_t,
132 struct ucred *);
133 static void rt2560_bbp_write(struct rt2560_softc *, uint8_t,
134 uint8_t);
135 static uint8_t rt2560_bbp_read(struct rt2560_softc *, uint8_t);
136 static void rt2560_rf_write(struct rt2560_softc *, uint8_t,
137 uint32_t);
138 static void rt2560_set_chan(struct rt2560_softc *,
139 struct ieee80211_channel *);
140 #if 0
141 static void rt2560_disable_rf_tune(struct rt2560_softc *);
142 #endif
143 static void rt2560_enable_tsf_sync(struct rt2560_softc *);
144 static void rt2560_enable_tsf(struct rt2560_softc *);
145 static void rt2560_update_plcp(struct rt2560_softc *);
146 static void rt2560_update_slot(struct ifnet *);
147 static void rt2560_set_basicrates(struct rt2560_softc *);
148 static void rt2560_update_led(struct rt2560_softc *, int, int);
149 static void rt2560_set_bssid(struct rt2560_softc *, const uint8_t *);
150 static void rt2560_set_macaddr(struct rt2560_softc *, uint8_t *);
151 static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *);
152 static void rt2560_update_promisc(struct ifnet *);
153 static const char *rt2560_get_rf(int);
154 static void rt2560_read_config(struct rt2560_softc *);
155 static int rt2560_bbp_init(struct rt2560_softc *);
156 static void rt2560_set_txantenna(struct rt2560_softc *, int);
157 static void rt2560_set_rxantenna(struct rt2560_softc *, int);
158 static void rt2560_init_locked(struct rt2560_softc *);
159 static void rt2560_init(void *);
160 static void rt2560_stop_locked(struct rt2560_softc *);
161 static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *,
162 const struct ieee80211_bpf_params *);
163
164 static const struct {
165 uint32_t reg;
166 uint32_t val;
167 } rt2560_def_mac[] = {
168 RT2560_DEF_MAC
169 };
170
171 static const struct {
172 uint8_t reg;
173 uint8_t val;
174 } rt2560_def_bbp[] = {
175 RT2560_DEF_BBP
176 };
177
178 static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2;
179 static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2;
180 static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2;
181 static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2;
182 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2;
183 static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2;
184 static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2;
185 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2;
186
187 static const struct {
188 uint8_t chan;
189 uint32_t r1, r2, r4;
190 } rt2560_rf5222[] = {
191 RT2560_RF5222
192 };
193
194 int
195 rt2560_attach(device_t dev, int id)
196 {
197 struct rt2560_softc *sc = device_get_softc(dev);
198 struct ieee80211com *ic;
199 struct ifnet *ifp;
200 int error;
201 uint8_t bands;
202 uint8_t macaddr[IEEE80211_ADDR_LEN];
203 struct sysctl_ctx_list *ctx;
204 struct sysctl_oid *tree;
205
206 sc->sc_dev = dev;
207
208 callout_init(&sc->watchdog_ch);
209
210 /* retrieve RT2560 rev. no */
211 sc->asic_rev = RAL_READ(sc, RT2560_CSR0);
212
213 /* retrieve RF rev. no and various other things from EEPROM */
214 rt2560_read_config(sc);
215
216 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n",
217 sc->asic_rev, rt2560_get_rf(sc->rf_rev));
218
219 /*
220 * Allocate Tx and Rx rings.
221 */
222 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT);
223 if (error != 0) {
224 device_printf(sc->sc_dev, "could not allocate Tx ring\n");
225 goto fail1;
226 }
227
228 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT);
229 if (error != 0) {
230 device_printf(sc->sc_dev, "could not allocate ATIM ring\n");
231 goto fail2;
232 }
233
234 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT);
235 if (error != 0) {
236 device_printf(sc->sc_dev, "could not allocate Prio ring\n");
237 goto fail3;
238 }
239
240 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT);
241 if (error != 0) {
242 device_printf(sc->sc_dev, "could not allocate Beacon ring\n");
243 goto fail4;
244 }
245
246 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT);
247 if (error != 0) {
248 device_printf(sc->sc_dev, "could not allocate Rx ring\n");
249 goto fail5;
250 }
251
252 ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
253 if (ifp == NULL) {
254 device_printf(sc->sc_dev, "can not if_alloc()\n");
255 goto fail6;
256 }
257 ic = ifp->if_l2com;
258
259 /* retrieve MAC address */
260 rt2560_get_macaddr(sc, macaddr);
261
262 ifp->if_softc = sc;
263 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
264 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
265 ifp->if_init = rt2560_init;
266 ifp->if_ioctl = rt2560_ioctl;
267 ifp->if_start = rt2560_start;
268 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
269 #ifdef notyet
270 ifq_set_ready(&ifp->if_snd);
271 #endif
272
273 ic->ic_ifp = ifp;
274 ic->ic_opmode = IEEE80211_M_STA;
275 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
276
277 /* set device capabilities */
278 ic->ic_caps =
279 IEEE80211_C_STA /* station mode */
280 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */
281 | IEEE80211_C_HOSTAP /* hostap mode */
282 | IEEE80211_C_MONITOR /* monitor mode */
283 | IEEE80211_C_AHDEMO /* adhoc demo mode */
284 | IEEE80211_C_WDS /* 4-address traffic works */
285 | IEEE80211_C_MBSS /* mesh point link mode */
286 | IEEE80211_C_SHPREAMBLE /* short preamble supported */
287 | IEEE80211_C_SHSLOT /* short slot time supported */
288 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */
289 | IEEE80211_C_BGSCAN /* capable of bg scanning */
290 #ifdef notyet
291 | IEEE80211_C_TXFRAG /* handle tx frags */
292 #endif
293 ;
294
295 bands = 0;
296 setbit(&bands, IEEE80211_MODE_11B);
297 setbit(&bands, IEEE80211_MODE_11G);
298 if (sc->rf_rev == RT2560_RF_5222)
299 setbit(&bands, IEEE80211_MODE_11A);
300 ieee80211_init_channels(ic, NULL, &bands);
301
302 ieee80211_ifattach(ic, macaddr);
303 ic->ic_raw_xmit = rt2560_raw_xmit;
304 ic->ic_updateslot = rt2560_update_slot;
305 ic->ic_update_promisc = rt2560_update_promisc;
306 ic->ic_scan_start = rt2560_scan_start;
307 ic->ic_scan_end = rt2560_scan_end;
308 ic->ic_set_channel = rt2560_set_channel;
309
310 ic->ic_vap_create = rt2560_vap_create;
311 ic->ic_vap_delete = rt2560_vap_delete;
312
313 ieee80211_radiotap_attach(ic,
314 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
315 RT2560_TX_RADIOTAP_PRESENT,
316 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
317 RT2560_RX_RADIOTAP_PRESENT);
318
319 /*
320 * Add a few sysctl knobs.
321 */
322 ctx = &sc->sc_sysctl_ctx;
323 sysctl_ctx_init(ctx);
324 tree = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_hw),
325 OID_AUTO,
326 device_get_nameunit(sc->sc_dev),
327 CTLFLAG_RD, 0, "");
328 if (tree == NULL) {
329 device_printf(sc->sc_dev, "can't add sysctl node\n");
330 goto fail6;
331 }
332
333 #ifdef RAL_DEBUG
334 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
335 "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs");
336 #endif
337 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
338 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)");
339
340 SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
341 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)");
342
343 if (bootverbose)
344 ieee80211_announce(ic);
345
346 return 0;
347
348 fail6: rt2560_free_rx_ring(sc, &sc->rxq);
349 fail5: rt2560_free_tx_ring(sc, &sc->bcnq);
350 fail4: rt2560_free_tx_ring(sc, &sc->prioq);
351 fail3: rt2560_free_tx_ring(sc, &sc->atimq);
352 fail2: rt2560_free_tx_ring(sc, &sc->txq);
353 fail1:
354
355 return ENXIO;
356 }
357
358 int
359 rt2560_detach(void *xsc)
360 {
361 struct rt2560_softc *sc = xsc;
362 struct ifnet *ifp = sc->sc_ifp;
363 struct ieee80211com *ic = ifp->if_l2com;
364
365 rt2560_stop(sc);
366
367 ieee80211_ifdetach(ic);
368
369 rt2560_free_tx_ring(sc, &sc->txq);
370 rt2560_free_tx_ring(sc, &sc->atimq);
371 rt2560_free_tx_ring(sc, &sc->prioq);
372 rt2560_free_tx_ring(sc, &sc->bcnq);
373 rt2560_free_rx_ring(sc, &sc->rxq);
374
375 if_free(ifp);
376
377 return 0;
378 }
379
380 static struct ieee80211vap *
381 rt2560_vap_create(struct ieee80211com *ic,
382 const char name[IFNAMSIZ], int unit,
383 enum ieee80211_opmode opmode, int flags,
384 const uint8_t bssid[IEEE80211_ADDR_LEN],
385 const uint8_t mac[IEEE80211_ADDR_LEN])
386 {
387 struct ifnet *ifp = ic->ic_ifp;
388 struct rt2560_vap *rvp;
389 struct ieee80211vap *vap;
390
391 switch (opmode) {
392 case IEEE80211_M_STA:
393 case IEEE80211_M_IBSS:
394 case IEEE80211_M_AHDEMO:
395 case IEEE80211_M_MONITOR:
396 case IEEE80211_M_HOSTAP:
397 case IEEE80211_M_MBSS:
398 /* XXXRP: TBD */
399 if (!TAILQ_EMPTY(&ic->ic_vaps)) {
400 if_printf(ifp, "only 1 vap supported\n");
401 return NULL;
402 }
403 if (opmode == IEEE80211_M_STA)
404 flags |= IEEE80211_CLONE_NOBEACONS;
405 break;
406 case IEEE80211_M_WDS:
407 if (TAILQ_EMPTY(&ic->ic_vaps) ||
408 ic->ic_opmode != IEEE80211_M_HOSTAP) {
409 if_printf(ifp, "wds only supported in ap mode\n");
410 return NULL;
411 }
412 /*
413 * Silently remove any request for a unique
414 * bssid; WDS vap's always share the local
415 * mac address.
416 */
417 flags &= ~IEEE80211_CLONE_BSSID;
418 break;
419 default:
420 if_printf(ifp, "unknown opmode %d\n", opmode);
421 return NULL;
422 }
423 rvp = (struct rt2560_vap *) kmalloc(sizeof(struct rt2560_vap),
424 M_80211_VAP, M_INTWAIT | M_ZERO);
425 if (rvp == NULL)
426 return NULL;
427 vap = &rvp->ral_vap;
428 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
429
430 /* override state transition machine */
431 rvp->ral_newstate = vap->iv_newstate;
432 vap->iv_newstate = rt2560_newstate;
433 vap->iv_update_beacon = rt2560_beacon_update;
434
435 ieee80211_ratectl_init(vap);
436 /* complete setup */
437 ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status);
438 if (TAILQ_FIRST(&ic->ic_vaps) == vap)
439 ic->ic_opmode = opmode;
440 return vap;
441 }
442
443 static void
444 rt2560_vap_delete(struct ieee80211vap *vap)
445 {
446 struct rt2560_vap *rvp = RT2560_VAP(vap);
447
448 ieee80211_ratectl_deinit(vap);
449 ieee80211_vap_detach(vap);
450 kfree(rvp, M_80211_VAP);
451 }
452
453 void
454 rt2560_resume(void *xsc)
455 {
456 struct rt2560_softc *sc = xsc;
457 struct ifnet *ifp = sc->sc_ifp;
458
459 if (ifp->if_flags & IFF_UP)
460 rt2560_init(sc);
461 }
462
463 static void
464 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
465 {
466 if (error != 0)
467 return;
468
469 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
470
471 *(bus_addr_t *)arg = segs[0].ds_addr;
472 }
473
474 static int
475 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring,
476 int count)
477 {
478 int i, error;
479
480 ring->count = count;
481 ring->queued = 0;
482 ring->cur = ring->next = 0;
483 ring->cur_encrypt = ring->next_encrypt = 0;
484
485 error = bus_dma_tag_create(ring->desc_dmat, 4, 0,
486 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
487 count * RT2560_TX_DESC_SIZE, 1, count * RT2560_TX_DESC_SIZE,
488 0, &ring->desc_dmat);
489 if (error != 0) {
490 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
491 goto fail;
492 }
493
494 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
495 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
496 if (error != 0) {
497 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
498 goto fail;
499 }
500
501 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
502 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
503 0);
504 if (error != 0) {
505 device_printf(sc->sc_dev, "could not load desc DMA map\n");
506 goto fail;
507 }
508
509 ring->data = kmalloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF,
510 M_INTWAIT | M_ZERO);
511 if (ring->data == NULL) {
512 device_printf(sc->sc_dev, "could not allocate soft data\n");
513 error = ENOMEM;
514 goto fail;
515 }
516
517 error = bus_dma_tag_create(ring->data_dmat, 1, 0,
518 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
519 MCLBYTES, RT2560_MAX_SCATTER, MCLBYTES, 0, &ring->data_dmat);
520 if (error != 0) {
521 device_printf(sc->sc_dev, "could not create data DMA tag\n");
522 goto fail;
523 }
524
525 for (i = 0; i < count; i++) {
526 error = bus_dmamap_create(ring->data_dmat, 0,
527 &ring->data[i].map);
528 if (error != 0) {
529 device_printf(sc->sc_dev, "could not create DMA map\n");
530 goto fail;
531 }
532 }
533
534 return 0;
535
536 fail: rt2560_free_tx_ring(sc, ring);
537 return error;
538 }
539
540 static void
541 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
542 {
543 struct rt2560_tx_desc *desc;
544 struct rt2560_tx_data *data;
545 int i;
546
547 for (i = 0; i < ring->count; i++) {
548 desc = &ring->desc[i];
549 data = &ring->data[i];
550
551 if (data->m != NULL) {
552 bus_dmamap_sync(ring->data_dmat, data->map,
553 BUS_DMASYNC_POSTWRITE);
554 bus_dmamap_unload(ring->data_dmat, data->map);
555 m_freem(data->m);
556 data->m = NULL;
557 }
558
559 if (data->ni != NULL) {
560 ieee80211_free_node(data->ni);
561 data->ni = NULL;
562 }
563
564 desc->flags = 0;
565 }
566
567 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
568
569 ring->queued = 0;
570 ring->cur = ring->next = 0;
571 ring->cur_encrypt = ring->next_encrypt = 0;
572 }
573
574 static void
575 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
576 {
577 struct rt2560_tx_data *data;
578 int i;
579
580 if (ring->desc != NULL) {
581 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
582 BUS_DMASYNC_POSTWRITE);
583 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
584 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
585 }
586
587 if (ring->desc_dmat != NULL)
588 bus_dma_tag_destroy(ring->desc_dmat);
589
590 if (ring->data != NULL) {
591 for (i = 0; i < ring->count; i++) {
592 data = &ring->data[i];
593
594 if (data->m != NULL) {
595 bus_dmamap_sync(ring->data_dmat, data->map,
596 BUS_DMASYNC_POSTWRITE);
597 bus_dmamap_unload(ring->data_dmat, data->map);
598 m_freem(data->m);
599 }
600
601 if (data->ni != NULL)
602 ieee80211_free_node(data->ni);
603
604 if (data->map != NULL)
605 bus_dmamap_destroy(ring->data_dmat, data->map);
606 }
607
608 kfree(ring->data, M_DEVBUF);
609 }
610
611 if (ring->data_dmat != NULL)
612 bus_dma_tag_destroy(ring->data_dmat);
613 }
614
615 static int
616 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring,
617 int count)
618 {
619 struct rt2560_rx_desc *desc;
620 struct rt2560_rx_data *data;
621 bus_addr_t physaddr;
622 int i, error;
623
624 ring->count = count;
625 ring->cur = ring->next = 0;
626 ring->cur_decrypt = 0;
627
628 error = bus_dma_tag_create(ring->desc_dmat, 4, 0,
629 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
630 count * RT2560_RX_DESC_SIZE, 1, count * RT2560_RX_DESC_SIZE,
631 0, &ring->desc_dmat);
632 if (error != 0) {
633 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
634 goto fail;
635 }
636
637 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
638 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
639 if (error != 0) {
640 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
641 goto fail;
642 }
643
644 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
645 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
646 0);
647 if (error != 0) {
648 device_printf(sc->sc_dev, "could not load desc DMA map\n");
649 goto fail;
650 }
651
652 ring->data = kmalloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF,
653 M_INTWAIT | M_ZERO);
654 if (ring->data == NULL) {
655 device_printf(sc->sc_dev, "could not allocate soft data\n");
656 error = ENOMEM;
657 goto fail;
658 }
659
660 /*
661 * Pre-allocate Rx buffers and populate Rx ring.
662 */
663 error = bus_dma_tag_create(ring->data_dmat, 1, 0,
664 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
665 1, MCLBYTES, 0, &ring->data_dmat);
666 if (error != 0) {
667 device_printf(sc->sc_dev, "could not create data DMA tag\n");
668 goto fail;
669 }
670
671 for (i = 0; i < count; i++) {
672 desc = &sc->rxq.desc[i];
673 data = &sc->rxq.data[i];
674
675 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
676 if (error != 0) {
677 device_printf(sc->sc_dev, "could not create DMA map\n");
678 goto fail;
679 }
680
681 data->m = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
682 if (data->m == NULL) {
683 device_printf(sc->sc_dev,
684 "could not allocate rx mbuf\n");
685 error = ENOMEM;
686 goto fail;
687 }
688
689 error = bus_dmamap_load(ring->data_dmat, data->map,
690 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr,
691 &physaddr, 0);
692 if (error != 0) {
693 device_printf(sc->sc_dev,
694 "could not load rx buf DMA map");
695 goto fail;
696 }
697
698 desc->flags = htole32(RT2560_RX_BUSY);
699 desc->physaddr = htole32(physaddr);
700 }
701
702 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
703
704 return 0;
705
706 fail: rt2560_free_rx_ring(sc, ring);
707 return error;
708 }
709
710 static void
711 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
712 {
713 int i;
714
715 for (i = 0; i < ring->count; i++) {
716 ring->desc[i].flags = htole32(RT2560_RX_BUSY);
717 ring->data[i].drop = 0;
718 }
719
720 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
721
722 ring->cur = ring->next = 0;
723 ring->cur_decrypt = 0;
724 }
725
726 static void
727 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
728 {
729 struct rt2560_rx_data *data;
730 int i;
731
732 if (ring->desc != NULL) {
733 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
734 BUS_DMASYNC_POSTWRITE);
735 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
736 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
737 }
738
739 if (ring->desc_dmat != NULL)
740 bus_dma_tag_destroy(ring->desc_dmat);
741
742 if (ring->data != NULL) {
743 for (i = 0; i < ring->count; i++) {
744 data = &ring->data[i];
745
746 if (data->m != NULL) {
747 bus_dmamap_sync(ring->data_dmat, data->map,
748 BUS_DMASYNC_POSTREAD);
749 bus_dmamap_unload(ring->data_dmat, data->map);
750 m_freem(data->m);
751 }
752
753 if (data->map != NULL)
754 bus_dmamap_destroy(ring->data_dmat, data->map);
755 }
756
757 kfree(ring->data, M_DEVBUF);
758 }
759
760 if (ring->data_dmat != NULL)
761 bus_dma_tag_destroy(ring->data_dmat);
762 }
763
764 static int
765 rt2560_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
766 {
767 struct rt2560_vap *rvp = RT2560_VAP(vap);
768 struct ifnet *ifp = vap->iv_ic->ic_ifp;
769 struct rt2560_softc *sc = ifp->if_softc;
770 int error;
771
772 if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) {
773 /* abort TSF synchronization */
774 RAL_WRITE(sc, RT2560_CSR14, 0);
775
776 /* turn association led off */
777 rt2560_update_led(sc, 0, 0);
778 }
779
780 error = rvp->ral_newstate(vap, nstate, arg);
781
782 if (error == 0 && nstate == IEEE80211_S_RUN) {
783 struct ieee80211_node *ni = vap->iv_bss;
784 struct mbuf *m;
785
786 if (vap->iv_opmode != IEEE80211_M_MONITOR) {
787 rt2560_update_plcp(sc);
788 rt2560_set_basicrates(sc);
789 rt2560_set_bssid(sc, ni->ni_bssid);
790 }
791
792 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
793 vap->iv_opmode == IEEE80211_M_IBSS ||
794 vap->iv_opmode == IEEE80211_M_MBSS) {
795 m = ieee80211_beacon_alloc(ni, &rvp->ral_bo);
796 if (m == NULL) {
797 if_printf(ifp, "could not allocate beacon\n");
798 return ENOBUFS;
799 }
800 ieee80211_ref_node(ni);
801 error = rt2560_tx_bcn(sc, m, ni);
802 if (error != 0)
803 return error;
804 }
805
806 /* turn assocation led on */
807 rt2560_update_led(sc, 1, 0);
808
809 if (vap->iv_opmode != IEEE80211_M_MONITOR)
810 rt2560_enable_tsf_sync(sc);
811 else
812 rt2560_enable_tsf(sc);
813 }
814 return error;
815 }
816
817 /*
818 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or
819 * 93C66).
820 */
821 static uint16_t
822 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr)
823 {
824 uint32_t tmp;
825 uint16_t val;
826 int n;
827
828 /* clock C once before the first command */
829 RT2560_EEPROM_CTL(sc, 0);
830
831 RT2560_EEPROM_CTL(sc, RT2560_S);
832 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
833 RT2560_EEPROM_CTL(sc, RT2560_S);
834
835 /* write start bit (1) */
836 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
837 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
838
839 /* write READ opcode (10) */
840 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
841 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
842 RT2560_EEPROM_CTL(sc, RT2560_S);
843 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
844
845 /* write address (A5-A0 or A7-A0) */
846 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7;
847 for (; n >= 0; n--) {
848 RT2560_EEPROM_CTL(sc, RT2560_S |
849 (((addr >> n) & 1) << RT2560_SHIFT_D));
850 RT2560_EEPROM_CTL(sc, RT2560_S |
851 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C);
852 }
853
854 RT2560_EEPROM_CTL(sc, RT2560_S);
855
856 /* read data Q15-Q0 */
857 val = 0;
858 for (n = 15; n >= 0; n--) {
859 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
860 tmp = RAL_READ(sc, RT2560_CSR21);
861 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n;
862 RT2560_EEPROM_CTL(sc, RT2560_S);
863 }
864
865 RT2560_EEPROM_CTL(sc, 0);
866
867 /* clear Chip Select and clock C */
868 RT2560_EEPROM_CTL(sc, RT2560_S);
869 RT2560_EEPROM_CTL(sc, 0);
870 RT2560_EEPROM_CTL(sc, RT2560_C);
871
872 return val;
873 }
874
875 /*
876 * Some frames were processed by the hardware cipher engine and are ready for
877 * transmission.
878 */
879 static void
880 rt2560_encryption_intr(struct rt2560_softc *sc)
881 {
882 struct rt2560_tx_desc *desc;
883 int hw;
884
885 /* retrieve last descriptor index processed by cipher engine */
886 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr;
887 hw /= RT2560_TX_DESC_SIZE;
888
889 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
890 BUS_DMASYNC_POSTREAD);
891
892 while (sc->txq.next_encrypt != hw) {
893 if (sc->txq.next_encrypt == sc->txq.cur_encrypt) {
894 kprintf("hw encrypt %d, cur_encrypt %d\n", hw,
895 sc->txq.cur_encrypt);
896 break;
897 }
898
899 desc = &sc->txq.desc[sc->txq.next_encrypt];
900
901 if ((le32toh(desc->flags) & RT2560_TX_BUSY) ||
902 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY))
903 break;
904
905 /* for TKIP, swap eiv field to fix a bug in ASIC */
906 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) ==
907 RT2560_TX_CIPHER_TKIP)
908 desc->eiv = bswap32(desc->eiv);
909
910 /* mark the frame ready for transmission */
911 desc->flags |= htole32(RT2560_TX_VALID);
912 desc->flags |= htole32(RT2560_TX_BUSY);
913
914 DPRINTFN(sc, 15, "encryption done idx=%u\n",
915 sc->txq.next_encrypt);
916
917 sc->txq.next_encrypt =
918 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT;
919 }
920
921 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
922 BUS_DMASYNC_PREWRITE);
923
924 /* kick Tx */
925 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX);
926 }
927
928 static void
929 rt2560_tx_intr(struct rt2560_softc *sc)
930 {
931 struct ifnet *ifp = sc->sc_ifp;
932 struct rt2560_tx_desc *desc;
933 struct rt2560_tx_data *data;
934 struct mbuf *m;
935 uint32_t flags;
936 int retrycnt;
937 struct ieee80211vap *vap;
938 struct ieee80211_node *ni;
939
940 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
941 BUS_DMASYNC_POSTREAD);
942
943 for (;;) {
944 desc = &sc->txq.desc[sc->txq.next];
945 data = &sc->txq.data[sc->txq.next];
946
947 flags = le32toh(desc->flags);
948 if ((flags & RT2560_TX_BUSY) ||
949 (flags & RT2560_TX_CIPHER_BUSY) ||
950 !(flags & RT2560_TX_VALID))
951 break;
952
953 m = data->m;
954 ni = data->ni;
955 vap = ni->ni_vap;
956
957 switch (flags & RT2560_TX_RESULT_MASK) {
958 case RT2560_TX_SUCCESS:
959 retrycnt = 0;
960
961 DPRINTFN(sc, 10, "%s\n", "data frame sent successfully");
962 if (data->rix != IEEE80211_FIXED_RATE_NONE)
963 ieee80211_ratectl_tx_complete(vap, ni,
964 IEEE80211_RATECTL_TX_SUCCESS,
965 &retrycnt, NULL);
966 IFNET_STAT_INC(ifp, opackets, 1);
967 break;
968
969 case RT2560_TX_SUCCESS_RETRY:
970 retrycnt = RT2560_TX_RETRYCNT(flags);
971
972 DPRINTFN(sc, 9, "data frame sent after %u retries\n",
973 retrycnt);
974 if (data->rix != IEEE80211_FIXED_RATE_NONE)
975 ieee80211_ratectl_tx_complete(vap, ni,
976 IEEE80211_RATECTL_TX_SUCCESS,
977 &retrycnt, NULL);
978 IFNET_STAT_INC(ifp, opackets, 1);
979 break;
980
981 case RT2560_TX_FAIL_RETRY:
982 retrycnt = RT2560_TX_RETRYCNT(flags);
983
984 DPRINTFN(sc, 9, "data frame failed after %d retries\n",
985 retrycnt);
986 if (data->rix != IEEE80211_FIXED_RATE_NONE)
987 ieee80211_ratectl_tx_complete(vap, ni,
988 IEEE80211_RATECTL_TX_FAILURE,
989 &retrycnt, NULL);
990 IFNET_STAT_INC(ifp, oerrors, 1);
991 break;
992
993 case RT2560_TX_FAIL_INVALID:
994 case RT2560_TX_FAIL_OTHER:
995 default:
996 device_printf(sc->sc_dev, "sending data frame failed "
997 "0x%08x\n", flags);
998 IFNET_STAT_INC(ifp, oerrors, 1);
999 }
1000
1001 bus_dmamap_sync(sc->txq.data_dmat, data->map,
1002 BUS_DMASYNC_POSTWRITE);
1003 bus_dmamap_unload(sc->txq.data_dmat, data->map);
1004 m_freem(m);
1005 data->m = NULL;
1006 ieee80211_free_node(data->ni);
1007 data->ni = NULL;
1008 ni = NULL;
1009
1010 /* descriptor is no longer valid */
1011 desc->flags &= ~htole32(RT2560_TX_VALID);
1012
1013 DPRINTFN(sc, 15, "tx done idx=%u\n", sc->txq.next);
1014
1015 sc->txq.queued--;
1016 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT;
1017 }
1018
1019 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1020 BUS_DMASYNC_PREWRITE);
1021
1022 if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1023 sc->sc_tx_timer = 0;
1024
1025 if (sc->txq.queued < RT2560_TX_RING_COUNT - 1) {
1026 sc->sc_flags &= ~RT2560_F_DATA_OACTIVE;
1027 if ((sc->sc_flags &
1028 (RT2560_F_DATA_OACTIVE | RT2560_F_PRIO_OACTIVE)) == 0)
1029 ifq_clr_oactive(&ifp->if_snd);
1030 rt2560_start_locked(ifp);
1031 }
1032 }
1033
1034 static void
1035 rt2560_prio_intr(struct rt2560_softc *sc)
1036 {
1037 struct ifnet *ifp = sc->sc_ifp;
1038 struct rt2560_tx_desc *desc;
1039 struct rt2560_tx_data *data;
1040 struct ieee80211_node *ni;
1041 struct mbuf *m;
1042 int flags;
1043
1044 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1045 BUS_DMASYNC_POSTREAD);
1046
1047 for (;;) {
1048 desc = &sc->prioq.desc[sc->prioq.next];
1049 data = &sc->prioq.data[sc->prioq.next];
1050
1051 flags = le32toh(desc->flags);
1052 if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0)
1053 break;
1054
1055 switch (flags & RT2560_TX_RESULT_MASK) {
1056 case RT2560_TX_SUCCESS:
1057 DPRINTFN(sc, 10, "%s\n", "mgt frame sent successfully");
1058 break;
1059
1060 case RT2560_TX_SUCCESS_RETRY:
1061 DPRINTFN(sc, 9, "mgt frame sent after %u retries\n",
1062 (flags >> 5) & 0x7);
1063 break;
1064
1065 case RT2560_TX_FAIL_RETRY:
1066 DPRINTFN(sc, 9, "%s\n",
1067 "sending mgt frame failed (too much retries)");
1068 break;
1069
1070 case RT2560_TX_FAIL_INVALID:
1071 case RT2560_TX_FAIL_OTHER:
1072 default:
1073 device_printf(sc->sc_dev, "sending mgt frame failed "
1074 "0x%08x\n", flags);
1075 break;
1076 }
1077
1078 bus_dmamap_sync(sc->prioq.data_dmat, data->map,
1079 BUS_DMASYNC_POSTWRITE);
1080 bus_dmamap_unload(sc->prioq.data_dmat, data->map);
1081
1082 m = data->m;
1083 data->m = NULL;
1084 ni = data->ni;
1085 data->ni = NULL;
1086
1087 /* descriptor is no longer valid */
1088 desc->flags &= ~htole32(RT2560_TX_VALID);
1089
1090 DPRINTFN(sc, 15, "prio done idx=%u\n", sc->prioq.next);
1091
1092 sc->prioq.queued--;
1093 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT;
1094
1095 if (m->m_flags & M_TXCB)
1096 ieee80211_process_callback(ni, m,
1097 (flags & RT2560_TX_RESULT_MASK) &~
1098 (RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY));
1099 m_freem(m);
1100 ieee80211_free_node(ni);
1101 }
1102
1103 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1104 BUS_DMASYNC_PREWRITE);
1105
1106 if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1107 sc->sc_tx_timer = 0;
1108
1109 if (sc->prioq.queued < RT2560_PRIO_RING_COUNT) {
1110 sc->sc_flags &= ~RT2560_F_PRIO_OACTIVE;
1111 if ((sc->sc_flags &
1112 (RT2560_F_DATA_OACTIVE | RT2560_F_PRIO_OACTIVE)) == 0)
1113 ifq_clr_oactive(&ifp->if_snd);
1114 rt2560_start_locked(ifp);
1115 }
1116 }
1117
1118 /*
1119 * Some frames were processed by the hardware cipher engine and are ready for
1120 * handoff to the IEEE802.11 layer.
1121 */
1122 static void
1123 rt2560_decryption_intr(struct rt2560_softc *sc)
1124 {
1125 struct ifnet *ifp = sc->sc_ifp;
1126 struct ieee80211com *ic = ifp->if_l2com;
1127 struct rt2560_rx_desc *desc;
1128 struct rt2560_rx_data *data;
1129 bus_addr_t physaddr;
1130 struct ieee80211_frame *wh;
1131 struct ieee80211_node *ni;
1132 struct mbuf *mnew, *m;
1133 int hw, error;
1134 int8_t rssi, nf;
1135
1136 /* retrieve last decriptor index processed by cipher engine */
1137 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr;
1138 hw /= RT2560_RX_DESC_SIZE;
1139
1140 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1141 BUS_DMASYNC_POSTREAD);
1142
1143 for (; sc->rxq.cur_decrypt != hw;) {
1144 desc = &sc->rxq.desc[sc->rxq.cur_decrypt];
1145 data = &sc->rxq.data[sc->rxq.cur_decrypt];
1146
1147 if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1148 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1149 break;
1150
1151 if (data->drop) {
1152 IFNET_STAT_INC(ifp, ierrors, 1);
1153 goto skip;
1154 }
1155
1156 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 &&
1157 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) {
1158 IFNET_STAT_INC(ifp, ierrors, 1);
1159 goto skip;
1160 }
1161
1162 /*
1163 * Try to allocate a new mbuf for this ring element and load it
1164 * before processing the current mbuf. If the ring element
1165 * cannot be loaded, drop the received packet and reuse the old
1166 * mbuf. In the unlikely case that the old mbuf can't be
1167 * reloaded either, explicitly panic.
1168 */
1169 mnew = m_getcl(MB_DONTWAIT, MT_DATA, M_PKTHDR);
1170 if (mnew == NULL) {
1171 IFNET_STAT_INC(ifp, ierrors, 1);
1172 goto skip;
1173 }
1174
1175 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1176 BUS_DMASYNC_POSTREAD);
1177 bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1178
1179 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1180 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr,
1181 &physaddr, 0);
1182 if (error != 0) {
1183 m_freem(mnew);
1184
1185 /* try to reload the old mbuf */
1186 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1187 mtod(data->m, void *), MCLBYTES,
1188 rt2560_dma_map_addr, &physaddr, 0);
1189 if (error != 0) {
1190 /* very unlikely that it will fail... */
1191 panic("%s: could not load old rx mbuf",
1192 device_get_name(sc->sc_dev));
1193 }
1194 IFNET_STAT_INC(ifp, ierrors, 1);
1195 goto skip;
1196 }
1197
1198 /*
1199 * New mbuf successfully loaded, update Rx ring and continue
1200 * processing.
1201 */
1202 m = data->m;
1203 data->m = mnew;
1204 desc->physaddr = htole32(physaddr);
1205
1206 /* finalize mbuf */
1207 m->m_pkthdr.rcvif = ifp;
1208 m->m_pkthdr.len = m->m_len =
1209 (le32toh(desc->flags) >> 16) & 0xfff;
1210
1211 rssi = RT2560_RSSI(sc, desc->rssi);
1212 nf = RT2560_NOISE_FLOOR;
1213 if (ieee80211_radiotap_active(ic)) {
1214 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap;
1215 uint32_t tsf_lo, tsf_hi;
1216
1217 /* get timestamp (low and high 32 bits) */
1218 tsf_hi = RAL_READ(sc, RT2560_CSR17);
1219 tsf_lo = RAL_READ(sc, RT2560_CSR16);
1220
1221 tap->wr_tsf =
1222 htole64(((uint64_t)tsf_hi << 32) | tsf_lo);
1223 tap->wr_flags = 0;
1224 tap->wr_rate = ieee80211_plcp2rate(desc->rate,
1225 (desc->flags & htole32(RT2560_RX_OFDM)) ?
1226 IEEE80211_T_OFDM : IEEE80211_T_CCK);
1227 tap->wr_antenna = sc->rx_ant;
1228 tap->wr_antsignal = nf + rssi;
1229 tap->wr_antnoise = nf;
1230 }
1231
1232 sc->sc_flags |= RT2560_F_INPUT_RUNNING;
1233 wh = mtod(m, struct ieee80211_frame *);
1234 ni = ieee80211_find_rxnode(ic,
1235 (struct ieee80211_frame_min *)wh);
1236 if (ni != NULL) {
1237 (void) ieee80211_input(ni, m, rssi, nf);
1238 ieee80211_free_node(ni);
1239 } else
1240 (void) ieee80211_input_all(ic, m, rssi, nf);
1241
1242 sc->sc_flags &= ~RT2560_F_INPUT_RUNNING;
1243 skip: desc->flags = htole32(RT2560_RX_BUSY);
1244
1245 DPRINTFN(sc, 15, "decryption done idx=%u\n", sc->rxq.cur_decrypt);
1246
1247 sc->rxq.cur_decrypt =
1248 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT;
1249 }
1250
1251 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1252 BUS_DMASYNC_PREWRITE);
1253 }
1254
1255 /*
1256 * Some frames were received. Pass them to the hardware cipher engine before
1257 * sending them to the 802.11 layer.
1258 */
1259 static void
1260 rt2560_rx_intr(struct rt2560_softc *sc)
1261 {
1262 struct rt2560_rx_desc *desc;
1263 struct rt2560_rx_data *data;
1264
1265 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1266 BUS_DMASYNC_POSTREAD);
1267
1268 for (;;) {
1269 desc = &sc->rxq.desc[sc->rxq.cur];
1270 data = &sc->rxq.data[sc->rxq.cur];
1271
1272 if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1273 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1274 break;
1275
1276 data->drop = 0;
1277
1278 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) ||
1279 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) {
1280 /*
1281 * This should not happen since we did not request
1282 * to receive those frames when we filled RXCSR0.
1283 */
1284 DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n",
1285 le32toh(desc->flags));
1286 data->drop = 1;
1287 }
1288
1289 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) {
1290 DPRINTFN(sc, 5, "%s\n", "bad length");
1291 data->drop = 1;
1292 }
1293
1294 /* mark the frame for decryption */
1295 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY);
1296
1297 DPRINTFN(sc, 15, "rx done idx=%u\n", sc->rxq.cur);
1298
1299 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT;
1300 }
1301
1302 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1303 BUS_DMASYNC_PREWRITE);
1304
1305 /* kick decrypt */
1306 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT);
1307 }
1308
1309 static void
1310 rt2560_beacon_update(struct ieee80211vap *vap, int item)
1311 {
1312 struct rt2560_vap *rvp = RT2560_VAP(vap);
1313 struct ieee80211_beacon_offsets *bo = &rvp->ral_bo;
1314
1315 setbit(bo->bo_flags, item);
1316 }
1317
1318 /*
1319 * This function is called periodically in IBSS mode when a new beacon must be
1320 * sent out.
1321 */
1322 static void
1323 rt2560_beacon_expire(struct rt2560_softc *sc)
1324 {
1325 struct ifnet *ifp = sc->sc_ifp;
1326 struct ieee80211com *ic = ifp->if_l2com;
1327 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1328 struct rt2560_vap *rvp = RT2560_VAP(vap);
1329 struct rt2560_tx_data *data;
1330
1331 if (ic->ic_opmode != IEEE80211_M_IBSS &&
1332 ic->ic_opmode != IEEE80211_M_HOSTAP &&
1333 ic->ic_opmode != IEEE80211_M_MBSS)
1334 return;
1335
1336 data = &sc->bcnq.data[sc->bcnq.next];
1337 /*
1338 * Don't send beacon if bsschan isn't set
1339 */
1340 if (data->ni == NULL)
1341 return;
1342
1343 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE);
1344 bus_dmamap_unload(sc->bcnq.data_dmat, data->map);
1345
1346 /* XXX 1 =>'s mcast frames which means all PS sta's will wakeup! */
1347 ieee80211_beacon_update(data->ni, &rvp->ral_bo, data->m, 1);
1348
1349 rt2560_tx_bcn(sc, data->m, data->ni);
1350
1351 DPRINTFN(sc, 15, "%s", "beacon expired\n");
1352
1353 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT;
1354 }
1355
1356 /* ARGSUSED */
1357 static void
1358 rt2560_wakeup_expire(struct rt2560_softc *sc)
1359 {
1360 DPRINTFN(sc, 2, "%s", "wakeup expired\n");
1361 }
1362
1363 void
1364 rt2560_intr(void *arg)
1365 {
1366 struct rt2560_softc *sc = arg;
1367 struct ifnet *ifp = sc->sc_ifp;
1368 uint32_t r;
1369
1370 /* disable interrupts */
1371 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
1372
1373 /* don't re-enable interrupts if we're shutting down */
1374 if (!(ifp->if_flags & IFF_RUNNING)) {
1375 return;
1376 }
1377
1378 r = RAL_READ(sc, RT2560_CSR7);
1379 RAL_WRITE(sc, RT2560_CSR7, r);
1380
1381 if (r & RT2560_BEACON_EXPIRE)
1382 rt2560_beacon_expire(sc);
1383
1384 if (r & RT2560_WAKEUP_EXPIRE)
1385 rt2560_wakeup_expire(sc);
1386
1387 if (r & RT2560_ENCRYPTION_DONE)
1388 rt2560_encryption_intr(sc);
1389
1390 if (r & RT2560_TX_DONE)
1391 rt2560_tx_intr(sc);
1392
1393 if (r & RT2560_PRIO_DONE)
1394 rt2560_prio_intr(sc);
1395
1396 if (r & RT2560_DECRYPTION_DONE)
1397 rt2560_decryption_intr(sc);
1398
1399 if (r & RT2560_RX_DONE) {
1400 rt2560_rx_intr(sc);
1401 rt2560_encryption_intr(sc);
1402 }
1403
1404 /* re-enable interrupts */
1405 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
1406 }
1407
1408 #define RAL_SIFS 10 /* us */
1409
1410 #define RT2560_TXRX_TURNAROUND 10 /* us */
1411
1412 static uint8_t
1413 rt2560_plcp_signal(int rate)
1414 {
1415 switch (rate) {
1416 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1417 case 12: return 0xb;
1418 case 18: return 0xf;
1419 case 24: return 0xa;
1420 case 36: return 0xe;
1421 case 48: return 0x9;
1422 case 72: return 0xd;
1423 case 96: return 0x8;
1424 case 108: return 0xc;
1425
1426 /* CCK rates (NB: not IEEE std, device-specific) */
1427 case 2: return 0x0;
1428 case 4: return 0x1;
1429 case 11: return 0x2;
1430 case 22: return 0x3;
1431 }
1432 return 0xff; /* XXX unsupported/unknown rate */
1433 }
1434
1435 static void
1436 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc,
1437 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr)
1438 {
1439 struct ifnet *ifp = sc->sc_ifp;
1440 struct ieee80211com *ic = ifp->if_l2com;
1441 uint16_t plcp_length;
1442 int remainder;
1443
1444 desc->flags = htole32(flags);
1445 desc->flags |= htole32(len << 16);
1446
1447 desc->physaddr = htole32(physaddr);
1448 desc->wme = htole16(
1449 RT2560_AIFSN(2) |
1450 RT2560_LOGCWMIN(3) |
1451 RT2560_LOGCWMAX(8));
1452
1453 /* setup PLCP fields */
1454 desc->plcp_signal = rt2560_plcp_signal(rate);
1455 desc->plcp_service = 4;
1456
1457 len += IEEE80211_CRC_LEN;
1458 if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) {
1459 desc->flags |= htole32(RT2560_TX_OFDM);
1460
1461 plcp_length = len & 0xfff;
1462 desc->plcp_length_hi = plcp_length >> 6;
1463 desc->plcp_length_lo = plcp_length & 0x3f;
1464 } else {
1465 plcp_length = (16 * len + rate - 1) / rate;
1466 if (rate == 22) {
1467 remainder = (16 * len) % 22;
1468 if (remainder != 0 && remainder < 7)
1469 desc->plcp_service |= RT2560_PLCP_LENGEXT;
1470 }
1471 desc->plcp_length_hi = plcp_length >> 8;
1472 desc->plcp_length_lo = plcp_length & 0xff;
1473
1474 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
1475 desc->plcp_signal |= 0x08;
1476 }
1477
1478 if (!encrypt)
1479 desc->flags |= htole32(RT2560_TX_VALID);
1480 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY)
1481 : htole32(RT2560_TX_BUSY);
1482 }
1483
1484 static int
1485 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0,
1486 struct ieee80211_node *ni)
1487 {
1488 struct ieee80211vap *vap = ni->ni_vap;
1489 struct rt2560_tx_desc *desc;
1490 struct rt2560_tx_data *data;
1491 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1492 int nsegs, rate, error;
1493
1494 desc = &sc->bcnq.desc[sc->bcnq.cur];
1495 data = &sc->bcnq.data[sc->bcnq.cur];
1496
1497 /* XXX maybe a separate beacon rate? */
1498 rate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].mgmtrate;
1499
1500 error = bus_dmamap_load_mbuf_segment(sc->bcnq.data_dmat, data->map, m0,
1501 segs, 1, &nsegs, BUS_DMA_NOWAIT);
1502 if (error != 0) {
1503 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1504 error);
1505 m_freem(m0);
1506 return error;
1507 }
1508
1509 if (ieee80211_radiotap_active_vap(vap)) {
1510 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1511
1512 tap->wt_flags = 0;
1513 tap->wt_rate = rate;
1514 tap->wt_antenna = sc->tx_ant;
1515
1516 ieee80211_radiotap_tx(vap, m0);
1517 }
1518
1519 data->m = m0;
1520 data->ni = ni;
1521
1522 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF |
1523 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr);
1524
1525 DPRINTFN(sc, 10, "sending beacon frame len=%u idx=%u rate=%u\n",
1526 m0->m_pkthdr.len, sc->bcnq.cur, rate);
1527
1528 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1529 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map,
1530 BUS_DMASYNC_PREWRITE);
1531
1532 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT;
1533
1534 return 0;
1535 }
1536
1537 static int
1538 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0,
1539 struct ieee80211_node *ni)
1540 {
1541 struct ieee80211vap *vap = ni->ni_vap;
1542 struct ieee80211com *ic = ni->ni_ic;
1543 struct rt2560_tx_desc *desc;
1544 struct rt2560_tx_data *data;
1545 struct ieee80211_frame *wh;
1546 struct ieee80211_key *k;
1547 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1548 uint16_t dur;
1549 uint32_t flags = 0;
1550 int nsegs, rate, error;
1551
1552 desc = &sc->prioq.desc[sc->prioq.cur];
1553 data = &sc->prioq.data[sc->prioq.cur];
1554
1555 rate = vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)].mgmtrate;
1556
1557 wh = mtod(m0, struct ieee80211_frame *);
1558
1559 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1560 k = ieee80211_crypto_encap(ni, m0);
1561 if (k == NULL) {
1562 m_freem(m0);
1563 return ENOBUFS;
1564 }
1565 }
1566
1567 error = bus_dmamap_load_mbuf_segment(sc->prioq.data_dmat, data->map, m0,
1568 segs, 1, &nsegs, 0);
1569 if (error != 0) {
1570 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1571 error);
1572 m_freem(m0);
1573 return error;
1574 }
1575
1576 if (ieee80211_radiotap_active_vap(vap)) {
1577 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1578
1579 tap->wt_flags = 0;
1580 tap->wt_rate = rate;
1581 tap->wt_antenna = sc->tx_ant;
1582
1583 ieee80211_radiotap_tx(vap, m0);
1584 }
1585
1586 data->m = m0;
1587 data->ni = ni;
1588 /* management frames are not taken into account for amrr */
1589 data->rix = IEEE80211_FIXED_RATE_NONE;
1590
1591 wh = mtod(m0, struct ieee80211_frame *);
1592
1593 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1594 flags |= RT2560_TX_ACK;
1595
1596 dur = ieee80211_ack_duration(ic->ic_rt,
1597 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1598 *(uint16_t *)wh->i_dur = htole16(dur);
1599
1600 /* tell hardware to add timestamp for probe responses */
1601 if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
1602 IEEE80211_FC0_TYPE_MGT &&
1603 (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
1604 IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1605 flags |= RT2560_TX_TIMESTAMP;
1606 }
1607
1608 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0,
1609 segs->ds_addr);
1610
1611 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1612 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1613 BUS_DMASYNC_PREWRITE);
1614
1615 DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n",
1616 m0->m_pkthdr.len, sc->prioq.cur, rate);
1617
1618 /* kick prio */
1619 sc->prioq.queued++;
1620 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1621 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1622
1623 return 0;
1624 }
1625
1626 static int
1627 rt2560_sendprot(struct rt2560_softc *sc,
1628 const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate)
1629 {
1630 struct ieee80211com *ic = ni->ni_ic;
1631 const struct ieee80211_frame *wh;
1632 struct rt2560_tx_desc *desc;
1633 struct rt2560_tx_data *data;
1634 struct mbuf *mprot;
1635 int protrate, pktlen, flags, isshort, error;
1636 uint16_t dur;
1637 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1638 int nsegs;
1639
1640 KASSERT(prot == IEEE80211_PROT_RTSCTS || prot == IEEE80211_PROT_CTSONLY,
1641 ("protection %d", prot));
1642
1643 wh = mtod(m, const struct ieee80211_frame *);
1644 pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN;
1645
1646 protrate = ieee80211_ctl_rate(ic->ic_rt, rate);
1647 ieee80211_ack_rate(ic->ic_rt, rate);
1648
1649 isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0;
1650 dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort)
1651 + ieee80211_ack_duration(ic->ic_rt, rate, isshort);
1652 flags = RT2560_TX_MORE_FRAG;
1653 if (prot == IEEE80211_PROT_RTSCTS) {
1654 /* NB: CTS is the same size as an ACK */
1655 dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort);
1656 flags |= RT2560_TX_ACK;
1657 mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur);
1658 } else {
1659 mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur);
1660 }
1661 if (mprot == NULL) {
1662 /* XXX stat + msg */
1663 return ENOBUFS;
1664 }
1665
1666 desc = &sc->txq.desc[sc->txq.cur_encrypt];
1667 data = &sc->txq.data[sc->txq.cur_encrypt];
1668
1669 error = bus_dmamap_load_mbuf_segment(sc->txq.data_dmat, data->map,
1670 mprot, segs, 1, &nsegs, 0);
1671 if (error != 0) {
1672 device_printf(sc->sc_dev,
1673 "could not map mbuf (error %d)\n", error);
1674 m_freem(mprot);
1675 return error;
1676 }
1677
1678 data->m = mprot;
1679 data->ni = ieee80211_ref_node(ni);
1680 /* ctl frames are not taken into account for amrr */
1681 data->rix = IEEE80211_FIXED_RATE_NONE;
1682
1683 rt2560_setup_tx_desc(sc, desc, flags, mprot->m_pkthdr.len, protrate, 1,
1684 segs->ds_addr);
1685
1686 bus_dmamap_sync(sc->txq.data_dmat, data->map,
1687 BUS_DMASYNC_PREWRITE);
1688
1689 sc->txq.queued++;
1690 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1691
1692 return 0;
1693 }
1694
1695 static int
1696 rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0,
1697 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params)
1698 {
1699 struct ieee80211vap *vap = ni->ni_vap;
1700 struct ieee80211com *ic = ni->ni_ic;
1701 struct rt2560_tx_desc *desc;
1702 struct rt2560_tx_data *data;
1703 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1704 uint32_t flags;
1705 int nsegs, rate, error;
1706
1707 desc = &sc->prioq.desc[sc->prioq.cur];
1708 data = &sc->prioq.data[sc->prioq.cur];
1709
1710 rate = params->ibp_rate0;
1711 if (!ieee80211_isratevalid(ic->ic_rt, rate)) {
1712 /* XXX fall back to mcast/mgmt rate? */
1713 m_freem(m0);
1714 return EINVAL;
1715 }
1716
1717 flags = 0;
1718 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0)
1719 flags |= RT2560_TX_ACK;
1720 if (params->ibp_flags & (IEEE80211_BPF_RTS|IEEE80211_BPF_CTS)) {
1721 error = rt2560_sendprot(sc, m0, ni,
1722 params->ibp_flags & IEEE80211_BPF_RTS ?
1723 IEEE80211_PROT_RTSCTS : IEEE80211_PROT_CTSONLY,
1724 rate);
1725 if (error) {
1726 m_freem(m0);
1727 return error;
1728 }
1729 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1730 }
1731
1732 error = bus_dmamap_load_mbuf_segment(sc->prioq.data_dmat, data->map, m0,
1733 segs, 1, &nsegs, 0);
1734 if (error != 0) {
1735 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1736 error);
1737 m_freem(m0);
1738 return error;
1739 }
1740
1741 if (ieee80211_radiotap_active_vap(vap)) {
1742 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1743
1744 tap->wt_flags = 0;
1745 tap->wt_rate = rate;
1746 tap->wt_antenna = sc->tx_ant;
1747
1748 ieee80211_radiotap_tx(ni->ni_vap, m0);
1749 }
1750
1751 data->m = m0;
1752 data->ni = ni;
1753
1754 /* XXX need to setup descriptor ourself */
1755 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len,
1756 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0,
1757 segs->ds_addr);
1758
1759 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1760 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1761 BUS_DMASYNC_PREWRITE);
1762
1763 DPRINTFN(sc, 10, "sending raw frame len=%u idx=%u rate=%u\n",
1764 m0->m_pkthdr.len, sc->prioq.cur, rate);
1765
1766 /* kick prio */
1767 sc->prioq.queued++;
1768 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1769 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1770
1771 return 0;
1772 }
1773
1774 static int
1775 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0,
1776 struct ieee80211_node *ni)
1777 {
1778 struct ieee80211vap *vap = ni->ni_vap;
1779 struct ieee80211com *ic = ni->ni_ic;
1780 struct rt2560_tx_desc *desc;
1781 struct rt2560_tx_data *data;
1782 struct ieee80211_frame *wh;
1783 const struct ieee80211_txparam *tp;
1784 struct ieee80211_key *k;
1785 struct mbuf *mnew;
1786 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1787 uint16_t dur;
1788 uint32_t flags;
1789 int nsegs, rate, error;
1790
1791 wh = mtod(m0, struct ieee80211_frame *);
1792
1793 tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)];
1794 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1795 rate = tp->mcastrate;
1796 } else if (m0->m_flags & M_EAPOL) {
1797 rate = tp->mgmtrate;
1798 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
1799 rate = tp->ucastrate;
1800 } else {
1801 (void) ieee80211_ratectl_rate(ni, NULL, 0);
1802 rate = ni->ni_txrate;
1803 }
1804
1805 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1806 k = ieee80211_crypto_encap(ni, m0);
1807 if (k == NULL) {
1808 m_freem(m0);
1809 return ENOBUFS;
1810 }
1811
1812 /* packet header may have moved, reset our local pointer */
1813 wh = mtod(m0, struct ieee80211_frame *);
1814 }
1815
1816 flags = 0;
1817 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1818 int prot = IEEE80211_PROT_NONE;
1819 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold)
1820 prot = IEEE80211_PROT_RTSCTS;
1821 else if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1822 ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM)
1823 prot = ic->ic_protmode;
1824 if (prot != IEEE80211_PROT_NONE) {
1825 error = rt2560_sendprot(sc, m0, ni, prot, rate);
1826 if (error) {
1827 m_freem(m0);
1828 return error;
1829 }
1830 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1831 }
1832 }
1833
1834 data = &sc->txq.data[sc->txq.cur_encrypt];
1835 desc = &sc->txq.desc[sc->txq.cur_encrypt];
1836
1837 error = bus_dmamap_load_mbuf_segment(sc->txq.data_dmat, data->map, m0,
1838 segs, 1, &nsegs, 0);
1839 if (error != 0 && error != EFBIG) {
1840 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1841 error);
1842 m_freem(m0);
1843 return error;
1844 }
1845 if (error != 0) {
1846 mnew = m_defrag(m0, MB_DONTWAIT);
1847 if (mnew == NULL) {
1848 device_printf(sc->sc_dev,
1849 "could not defragment mbuf\n");
1850 m_freem(m0);
1851 return ENOBUFS;
1852 }
1853 m0 = mnew;
1854
1855 error = bus_dmamap_load_mbuf_segment(sc->txq.data_dmat, data->map,
1856 m0, segs, 1, &nsegs, 0);
1857 if (error != 0) {
1858 device_printf(sc->sc_dev,
1859 "could not map mbuf (error %d)\n", error);
1860 m_freem(m0);
1861 return error;
1862 }
1863
1864 /* packet header may have moved, reset our local pointer */
1865 wh = mtod(m0, struct ieee80211_frame *);
1866 }
1867
1868 if (ieee80211_radiotap_active_vap(vap)) {
1869 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1870
1871 tap->wt_flags = 0;
1872 tap->wt_rate = rate;
1873 tap->wt_antenna = sc->tx_ant;
1874
1875 ieee80211_radiotap_tx(vap, m0);
1876 }
1877
1878 data->m = m0;
1879 data->ni = ni;
1880
1881 /* remember link conditions for rate adaptation algorithm */
1882 if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) {
1883 data->rix = ni->ni_txrate;
1884 /* XXX probably need last rssi value and not avg */
1885 data->rssi = ic->ic_node_getrssi(ni);
1886 } else
1887 data->rix = IEEE80211_FIXED_RATE_NONE;
1888
1889 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1890 flags |= RT2560_TX_ACK;
1891
1892 dur = ieee80211_ack_duration(ic->ic_rt,
1893 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1894 *(uint16_t *)wh->i_dur = htole16(dur);
1895 }
1896
1897 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1,
1898 segs->ds_addr);
1899
1900 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1901 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1902 BUS_DMASYNC_PREWRITE);
1903
1904 DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n",
1905 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate);
1906
1907 /* kick encrypt */
1908 sc->txq.queued++;
1909 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1910 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT);
1911
1912 return 0;
1913 }
1914
1915 static void
1916 rt2560_start_locked(struct ifnet *ifp)
1917 {
1918 struct rt2560_softc *sc = ifp->if_softc;
1919 struct mbuf *m;
1920 struct ieee80211_node *ni;
1921
1922 for (;;) {
1923 m = ifq_dequeue(&ifp->if_snd);
1924 if (m == NULL)
1925 break;
1926 if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) {
1927 ifq_prepend(&ifp->if_snd, m);
1928 ifq_set_oactive(&ifp->if_snd);
1929 sc->sc_flags |= RT2560_F_DATA_OACTIVE;
1930 break;
1931 }
1932 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1933 if (rt2560_tx_data(sc, m, ni) != 0) {
1934 ieee80211_free_node(ni);
1935 IFNET_STAT_INC(ifp, oerrors, 1);
1936 break;
1937 }
1938
1939 sc->sc_tx_timer = 5;
1940 }
1941 }
1942
1943 static void
1944 rt2560_start(struct ifnet *ifp, struct ifaltq_subque *ifsq)
1945 {
1946 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
1947 rt2560_start_locked(ifp);
1948 }
1949
1950 static void
1951 rt2560_watchdog_callout(void *arg)
1952 {
1953 struct rt2560_softc *sc = arg;
1954 struct ifnet *ifp = sc->sc_ifp;
1955
1956 KASSERT(ifp->if_flags & IFF_RUNNING, ("not running"));
1957
1958 if (sc->sc_invalid) /* card ejected */
1959 return;
1960
1961 rt2560_encryption_intr(sc);
1962 rt2560_tx_intr(sc);
1963
1964 if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) {
1965 if_printf(ifp, "device timeout\n");
1966 rt2560_init_locked(sc);
1967 IFNET_STAT_INC(ifp, oerrors, 1);
1968 /* NB: callout is reset in rt2560_init() */
1969 return;
1970 }
1971 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog_callout, sc);
1972 }
1973
1974 static int
1975 rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *ucred)
1976 {
1977 struct rt2560_softc *sc = ifp->if_softc;
1978 struct ieee80211com *ic = ifp->if_l2com;
1979 struct ifreq *ifr = (struct ifreq *) data;
1980 int error = 0, startall = 0;
1981
1982 switch (cmd) {
1983 case SIOCSIFFLAGS:
1984 if (ifp->if_flags & IFF_UP) {
1985 if ((ifp->if_flags & IFF_RUNNING) == 0) {
1986 rt2560_init_locked(sc);
1987 startall = 1;
1988 } else
1989 rt2560_update_promisc(ifp);
1990 } else {
1991 if (ifp->if_flags & IFF_RUNNING)
1992 rt2560_stop_locked(sc);
1993 }
1994 if (startall)
1995 ieee80211_start_all(ic);
1996 break;
1997 case SIOCGIFMEDIA:
1998 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
1999 break;
2000 case SIOCGIFADDR:
2001 error = ether_ioctl(ifp, cmd, data);
2002 break;
2003 default:
2004 error = EINVAL;
2005 break;
2006 }
2007 return error;
2008 }
2009
2010 static void
2011 rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val)
2012 {
2013 uint32_t tmp;
2014 int ntries;
2015
2016 for (ntries = 0; ntries < 100; ntries++) {
2017 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
2018 break;
2019 DELAY(1);
2020 }
2021 if (ntries == 100) {
2022 device_printf(sc->sc_dev, "could not write to BBP\n");
2023 return;
2024 }
2025
2026 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val;
2027 RAL_WRITE(sc, RT2560_BBPCSR, tmp);
2028
2029 DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val);
2030 }
2031
2032 static uint8_t
2033 rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg)
2034 {
2035 uint32_t val;
2036 int ntries;
2037
2038 for (ntries = 0; ntries < 100; ntries++) {
2039 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
2040 break;
2041 DELAY(1);
2042 }
2043 if (ntries == 100) {
2044 device_printf(sc->sc_dev, "could not read from BBP\n");
2045 return 0;
2046 }
2047
2048 val = RT2560_BBP_BUSY | reg << 8;
2049 RAL_WRITE(sc, RT2560_BBPCSR, val);
2050
2051 for (ntries = 0; ntries < 100; ntries++) {
2052 val = RAL_READ(sc, RT2560_BBPCSR);
2053 if (!(val & RT2560_BBP_BUSY))
2054 return val & 0xff;
2055 DELAY(1);
2056 }
2057
2058 device_printf(sc->sc_dev, "could not read from BBP\n");
2059 return 0;
2060 }
2061
2062 static void
2063 rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val)
2064 {
2065 uint32_t tmp;
2066 int ntries;
2067
2068 for (ntries = 0; ntries < 100; ntries++) {
2069 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY))
2070 break;
2071 DELAY(1);
2072 }
2073 if (ntries == 100) {
2074 device_printf(sc->sc_dev, "could not write to RF\n");
2075 return;
2076 }
2077
2078 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 |
2079 (reg & 0x3);
2080 RAL_WRITE(sc, RT2560_RFCSR, tmp);
2081
2082 /* remember last written value in sc */
2083 sc->rf_regs[reg] = val;
2084
2085 DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff);
2086 }
2087
2088 static void
2089 rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c)
2090 {
2091 struct ifnet *ifp = sc->sc_ifp;
2092 struct ieee80211com *ic = ifp->if_l2com;
2093 uint8_t power, tmp;
2094 u_int i, chan;
2095
2096 chan = ieee80211_chan2ieee(ic, c);
2097 KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan));
2098
2099 if (IEEE80211_IS_CHAN_2GHZ(c))
2100 power = min(sc->txpow[chan - 1], 31);
2101 else
2102 power = 31;
2103
2104 /* adjust txpower using ifconfig settings */
2105 power -= (100 - ic->ic_txpowlimit) / 8;
2106
2107 DPRINTFN(sc, 2, "setting channel to %u, txpower to %u\n", chan, power);
2108
2109 switch (sc->rf_rev) {
2110 case RT2560_RF_2522:
2111 rt2560_rf_write(sc, RAL_RF1, 0x00814);
2112 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]);
2113 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2114 break;
2115
2116 case RT2560_RF_2523:
2117 rt2560_rf_write(sc, RAL_RF1, 0x08804);
2118 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]);
2119 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044);
2120 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2121 break;
2122
2123 case RT2560_RF_2524:
2124 rt2560_rf_write(sc, RAL_RF1, 0x0c808);
2125 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]);
2126 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2127 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2128 break;
2129
2130 case RT2560_RF_2525:
2131 rt2560_rf_write(sc, RAL_RF1, 0x08808);
2132 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]);
2133 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2134 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2135
2136 rt2560_rf_write(sc, RAL_RF1, 0x08808);
2137 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]);
2138 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2139 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2140 break;
2141
2142 case RT2560_RF_2525E:
2143 rt2560_rf_write(sc, RAL_RF1, 0x08808);
2144 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]);
2145 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2146 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282);
2147 break;
2148
2149 case RT2560_RF_2526:
2150 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]);
2151 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2152 rt2560_rf_write(sc, RAL_RF1, 0x08804);
2153
2154 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]);
2155 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2156 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2157 break;
2158
2159 /* dual-band RF */
2160 case RT2560_RF_5222:
2161 for (i = 0; rt2560_rf5222[i].chan != chan; i++);
2162
2163 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1);
2164 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2);
2165 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2166 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4);
2167 break;
2168 default:
2169 kprintf("unknown ral rev=%d\n", sc->rf_rev);
2170 }
2171
2172 /* XXX */
2173 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
2174 /* set Japan filter bit for channel 14 */
2175 tmp = rt2560_bbp_read(sc, 70);
2176
2177 tmp &= ~RT2560_JAPAN_FILTER;
2178 if (chan == 14)
2179 tmp |= RT2560_JAPAN_FILTER;
2180
2181 rt2560_bbp_write(sc, 70, tmp);
2182
2183 /* clear CRC errors */
2184 RAL_READ(sc, RT2560_CNT0);
2185 }
2186 }
2187
2188 static void
2189 rt2560_set_channel(struct ieee80211com *ic)
2190 {
2191 struct ifnet *ifp = ic->ic_ifp;
2192 struct rt2560_softc *sc = ifp->if_softc;
2193
2194 rt2560_set_chan(sc, ic->ic_curchan);
2195
2196 }
2197
2198 #if 0
2199 /*
2200 * Disable RF auto-tuning.
2201 */
2202 static void
2203 rt2560_disable_rf_tune(struct rt2560_softc *sc)
2204 {
2205 uint32_t tmp;
2206
2207 if (sc->rf_rev != RT2560_RF_2523) {
2208 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE;
2209 rt2560_rf_write(sc, RAL_RF1, tmp);
2210 }
2211
2212 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE;
2213 rt2560_rf_write(sc, RAL_RF3, tmp);
2214
2215 DPRINTFN(sc, 2, "%s", "disabling RF autotune\n");
2216 }
2217 #endif
2218
2219 /*
2220 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF
2221 * synchronization.
2222 */
2223 static void
2224 rt2560_enable_tsf_sync(struct rt2560_softc *sc)
2225 {
2226 struct ifnet *ifp = sc->sc_ifp;
2227 struct ieee80211com *ic = ifp->if_l2com;
2228 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2229 uint16_t logcwmin, preload;
2230 uint32_t tmp;
2231
2232 /* first, disable TSF synchronization */
2233 RAL_WRITE(sc, RT2560_CSR14, 0);
2234
2235 tmp = 16 * vap->iv_bss->ni_intval;
2236 RAL_WRITE(sc, RT2560_CSR12, tmp);
2237
2238 RAL_WRITE(sc, RT2560_CSR13, 0);
2239
2240 logcwmin = 5;
2241 preload = (vap->iv_opmode == IEEE80211_M_STA) ? 384 : 1024;
2242 tmp = logcwmin << 16 | preload;
2243 RAL_WRITE(sc, RT2560_BCNOCSR, tmp);
2244
2245 /* finally, enable TSF synchronization */
2246 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN;
2247 if (ic->ic_opmode == IEEE80211_M_STA)
2248 tmp |= RT2560_ENABLE_TSF_SYNC(1);
2249 else
2250 tmp |= RT2560_ENABLE_TSF_SYNC(2) |
2251 RT2560_ENABLE_BEACON_GENERATOR;
2252 RAL_WRITE(sc, RT2560_CSR14, tmp);
2253
2254 DPRINTF(sc, "%s", "enabling TSF synchronization\n");
2255 }
2256
2257 static void
2258 rt2560_enable_tsf(struct rt2560_softc *sc)
2259 {
2260 RAL_WRITE(sc, RT2560_CSR14, 0);
2261 RAL_WRITE(sc, RT2560_CSR14,
2262 RT2560_ENABLE_TSF_SYNC(2) | RT2560_ENABLE_TSF);
2263 }
2264
2265 static void
2266 rt2560_update_plcp(struct rt2560_softc *sc)
2267 {
2268 struct ifnet *ifp = sc->sc_ifp;
2269 struct ieee80211com *ic = ifp->if_l2com;
2270
2271 /* no short preamble for 1Mbps */
2272 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400);
2273
2274 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) {
2275 /* values taken from the reference driver */
2276 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401);
2277 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402);
2278 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403);
2279 } else {
2280 /* same values as above or'ed 0x8 */
2281 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409);
2282 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a);
2283 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b);
2284 }
2285
2286 DPRINTF(sc, "updating PLCP for %s preamble\n",
2287 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long");
2288 }
2289
2290 /*
2291 * This function can be called by ieee80211_set_shortslottime(). Refer to
2292 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed.
2293 */
2294 static void
2295 rt2560_update_slot(struct ifnet *ifp)
2296 {
2297 struct rt2560_softc *sc = ifp->if_softc;
2298 struct ieee80211com *ic = ifp->if_l2com;
2299 uint8_t slottime;
2300 uint16_t tx_sifs, tx_pifs, tx_difs, eifs;
2301 uint32_t tmp;
2302
2303 #ifndef FORCE_SLOTTIME
2304 slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20;
2305 #else
2306 /*
2307 * Setting slot time according to "short slot time" capability
2308 * in beacon/probe_resp seems to cause problem to acknowledge
2309 * certain AP's data frames transimitted at CCK/DS rates: the
2310 * problematic AP keeps retransmitting data frames, probably
2311 * because MAC level acks are not received by hardware.
2312 * So we cheat a little bit here by claiming we are capable of
2313 * "short slot time" but setting hardware slot time to the normal
2314 * slot time. ral(4) does not seem to have trouble to receive
2315 * frames transmitted using short slot time even if hardware
2316 * slot time is set to normal slot time. If we didn't use this
2317 * trick, we would have to claim that short slot time is not
2318 * supported; this would give relative poor RX performance
2319 * (-1Mb~-2Mb lower) and the _whole_ BSS would stop using short
2320 * slot time.
2321 */
2322 slottime = 20;
2323 #endif
2324
2325 /* update the MAC slot boundaries */
2326 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND;
2327 tx_pifs = tx_sifs + slottime;
2328 tx_difs = tx_sifs + 2 * slottime;
2329 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60;
2330
2331 tmp = RAL_READ(sc, RT2560_CSR11);
2332 tmp = (tmp & ~0x1f00) | slottime << 8;
2333 RAL_WRITE(sc, RT2560_CSR11, tmp);
2334
2335 tmp = tx_pifs << 16 | tx_sifs;
2336 RAL_WRITE(sc, RT2560_CSR18, tmp);
2337
2338 tmp = eifs << 16 | tx_difs;
2339 RAL_WRITE(sc, RT2560_CSR19, tmp);
2340
2341 DPRINTF(sc, "setting slottime to %uus\n", slottime);
2342 }
2343
2344 static void
2345 rt2560_set_basicrates(struct rt2560_softc *sc)
2346 {
2347 struct ifnet *ifp = sc->sc_ifp;
2348 struct ieee80211com *ic = ifp->if_l2com;
2349
2350 /* update basic rate set */
2351 if (ic->ic_curmode == IEEE80211_MODE_11B) {
2352 /* 11b basic rates: 1, 2Mbps */
2353 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3);
2354 } else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) {
2355 /* 11a basic rates: 6, 12, 24Mbps */
2356 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150);
2357 } else {
2358 /* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */
2359 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f);
2360 }
2361 }
2362
2363 static void
2364 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2)
2365 {
2366 uint32_t tmp;
2367
2368 /* set ON period to 70ms and OFF period to 30ms */
2369 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30;
2370 RAL_WRITE(sc, RT2560_LEDCSR, tmp);
2371 }
2372
2373 static void
2374 rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid)
2375 {
2376 uint32_t tmp;
2377 char ethstr[ETHER_ADDRSTRLEN + 1];
2378
2379 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24;
2380 RAL_WRITE(sc, RT2560_CSR5, tmp);
2381
2382 tmp = bssid[4] | bssid[5] << 8;
2383 RAL_WRITE(sc, RT2560_CSR6, tmp);
2384
2385 DPRINTF(sc, "setting BSSID to %s\n", kether_ntoa(bssid, ethstr));
2386 }
2387
2388 static void
2389 rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2390 {
2391 uint32_t tmp;
2392 char ethstr[ETHER_ADDRSTRLEN + 1];
2393
2394 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24;
2395 RAL_WRITE(sc, RT2560_CSR3, tmp);
2396
2397 tmp = addr[4] | addr[5] << 8;
2398 RAL_WRITE(sc, RT2560_CSR4, tmp);
2399
2400 DPRINTF(sc, "setting MAC address to %s\n", kether_ntoa(addr, ethstr));
2401 }
2402
2403 static void
2404 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2405 {
2406 uint32_t tmp;
2407
2408 tmp = RAL_READ(sc, RT2560_CSR3);
2409 addr[0] = tmp & 0xff;
2410 addr[1] = (tmp >> 8) & 0xff;
2411 addr[2] = (tmp >> 16) & 0xff;
2412 addr[3] = (tmp >> 24);
2413
2414 tmp = RAL_READ(sc, RT2560_CSR4);
2415 addr[4] = tmp & 0xff;
2416 addr[5] = (tmp >> 8) & 0xff;
2417 }
2418
2419 static void
2420 rt2560_update_promisc(struct ifnet *ifp)
2421 {
2422 struct rt2560_softc *sc = ifp->if_softc;
2423 uint32_t tmp;
2424
2425 tmp = RAL_READ(sc, RT2560_RXCSR0);
2426
2427 tmp &= ~RT2560_DROP_NOT_TO_ME;
2428 if (!(ifp->if_flags & IFF_PROMISC))
2429 tmp |= RT2560_DROP_NOT_TO_ME;
2430
2431 RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2432
2433 DPRINTF(sc, "%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ?
2434 "entering" : "leaving");
2435 }
2436
2437 static const char *
2438 rt2560_get_rf(int rev)
2439 {
2440 switch (rev) {
2441 case RT2560_RF_2522: return "RT2522";
2442 case RT2560_RF_2523: return "RT2523";
2443 case RT2560_RF_2524: return "RT2524";
2444 case RT2560_RF_2525: return "RT2525";
2445 case RT2560_RF_2525E: return "RT2525e";
2446 case RT2560_RF_2526: return "RT2526";
2447 case RT2560_RF_5222: return "RT5222";
2448 default: return "unknown";
2449 }
2450 }
2451
2452 static void
2453 rt2560_read_config(struct rt2560_softc *sc)
2454 {
2455 uint16_t val;
2456 int i;
2457
2458 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0);
2459 sc->rf_rev = (val >> 11) & 0x7;
2460 sc->hw_radio = (val >> 10) & 0x1;
2461 sc->led_mode = (val >> 6) & 0x7;
2462 sc->rx_ant = (val >> 4) & 0x3;
2463 sc->tx_ant = (val >> 2) & 0x3;
2464 sc->nb_ant = val & 0x3;
2465
2466 /* read default values for BBP registers */
2467 for (i = 0; i < 16; i++) {
2468 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i);
2469 if (val == 0 || val == 0xffff)
2470 continue;
2471
2472 sc->bbp_prom[i].reg = val >> 8;
2473 sc->bbp_prom[i].val = val & 0xff;
2474 }
2475
2476 /* read Tx power for all b/g channels */
2477 for (i = 0; i < 14 / 2; i++) {
2478 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i);
2479 sc->txpow[i * 2] = val & 0xff;
2480 sc->txpow[i * 2 + 1] = val >> 8;
2481 }
2482 for (i = 0; i < 14; ++i) {
2483 if (sc->txpow[i] > 31)
2484 sc->txpow[i] = 24;
2485 }
2486
2487 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE);
2488 if ((val & 0xff) == 0xff)
2489 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR;
2490 else
2491 sc->rssi_corr = val & 0xff;
2492 DPRINTF(sc, "rssi correction %d, calibrate 0x%02x\n",
2493 sc->rssi_corr, val);
2494 }
2495
2496
2497 static void
2498 rt2560_scan_start(struct ieee80211com *ic)
2499 {
2500 struct ifnet *ifp = ic->ic_ifp;
2501 struct rt2560_softc *sc = ifp->if_softc;
2502
2503 /* abort TSF synchronization */
2504 RAL_WRITE(sc, RT2560_CSR14, 0);
2505 rt2560_set_bssid(sc, ifp->if_broadcastaddr);
2506 }
2507
2508 static void
2509 rt2560_scan_end(struct ieee80211com *ic)
2510 {
2511 struct ifnet *ifp = ic->ic_ifp;
2512 struct rt2560_softc *sc = ifp->if_softc;
2513 struct ieee80211vap *vap = ic->ic_scan->ss_vap;
2514
2515 rt2560_enable_tsf_sync(sc);
2516 /* XXX keep local copy */
2517 rt2560_set_bssid(sc, vap->iv_bss->ni_bssid);
2518 }
2519
2520 static int
2521 rt2560_bbp_init(struct rt2560_softc *sc)
2522 {
2523 #define N(a) (sizeof (a) / sizeof ((a)[0]))
2524 int i, ntries;
2525
2526 /* wait for BBP to be ready */
2527 for (ntries = 0; ntries < 100; ntries++) {
2528 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0)
2529 break;
2530 DELAY(1);
2531 }
2532 if (ntries == 100) {
2533 device_printf(sc->sc_dev, "timeout waiting for BBP\n");
2534 return EIO;
2535 }
2536
2537 /* initialize BBP registers to default values */
2538 for (i = 0; i < N(rt2560_def_bbp); i++) {
2539 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg,
2540 rt2560_def_bbp[i].val);
2541 }
2542
2543 /* initialize BBP registers to values stored in EEPROM */
2544 for (i = 0; i < 16; i++) {
2545 if (sc->bbp_prom[i].reg == 0 && sc->bbp_prom[i].val == 0)
2546 break;
2547 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val);
2548 }
2549 rt2560_bbp_write(sc, 17, 0x48); /* XXX restore bbp17 */
2550
2551 return 0;
2552 #undef N
2553 }
2554
2555 static void
2556 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna)
2557 {
2558 uint32_t tmp;
2559 uint8_t tx;
2560
2561 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK;
2562 if (antenna == 1)
2563 tx |= RT2560_BBP_ANTA;
2564 else if (antenna == 2)
2565 tx |= RT2560_BBP_ANTB;
2566 else
2567 tx |= RT2560_BBP_DIVERSITY;
2568
2569 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */
2570 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 ||
2571 sc->rf_rev == RT2560_RF_5222)
2572 tx |= RT2560_BBP_FLIPIQ;
2573
2574 rt2560_bbp_write(sc, RT2560_BBP_TX, tx);
2575
2576 /* update values for CCK and OFDM in BBPCSR1 */
2577 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007;
2578 tmp |= (tx & 0x7) << 16 | (tx & 0x7);
2579 RAL_WRITE(sc, RT2560_BBPCSR1, tmp);
2580 }
2581
2582 static void
2583 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna)
2584 {
2585 uint8_t rx;
2586
2587 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK;
2588 if (antenna == 1)
2589 rx |= RT2560_BBP_ANTA;
2590 else if (antenna == 2)
2591 rx |= RT2560_BBP_ANTB;
2592 else
2593 rx |= RT2560_BBP_DIVERSITY;
2594
2595 /* need to force no I/Q flip for RF 2525e and 2526 */
2596 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526)
2597 rx &= ~RT2560_BBP_FLIPIQ;
2598
2599 rt2560_bbp_write(sc, RT2560_BBP_RX, rx);
2600 }
2601
2602 static void
2603 rt2560_init_locked(struct rt2560_softc *sc)
2604 {
2605 #define N(a) (sizeof (a) / sizeof ((a)[0]))
2606 struct ifnet *ifp = sc->sc_ifp;
2607 struct ieee80211com *ic = ifp->if_l2com;
2608 uint32_t tmp;
2609 int i;
2610
2611 rt2560_stop_locked(sc);
2612
2613 /* setup tx rings */
2614 tmp = RT2560_PRIO_RING_COUNT << 24 |
2615 RT2560_ATIM_RING_COUNT << 16 |
2616 RT2560_TX_RING_COUNT << 8 |
2617 RT2560_TX_DESC_SIZE;
2618
2619 /* rings must be initialized in this exact order */
2620 RAL_WRITE(sc, RT2560_TXCSR2, tmp);
2621 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr);
2622 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr);
2623 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr);
2624 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr);
2625
2626 /* setup rx ring */
2627 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE;
2628
2629 RAL_WRITE(sc, RT2560_RXCSR1, tmp);
2630 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr);
2631
2632 /* initialize MAC registers to default values */
2633 for (i = 0; i < N(rt2560_def_mac); i++)
2634 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val);
2635
2636 rt2560_set_macaddr(sc, IF_LLADDR(ifp));
2637
2638 /* set basic rate set (will be updated later) */
2639 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153);
2640
2641 rt2560_update_slot(ifp);
2642 rt2560_update_plcp(sc);
2643 rt2560_update_led(sc, 0, 0);
2644
2645 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2646 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY);
2647
2648 if (rt2560_bbp_init(sc) != 0) {
2649 rt2560_stop(sc);
2650 return;
2651 }
2652
2653 rt2560_set_txantenna(sc, sc->tx_ant);
2654 rt2560_set_rxantenna(sc, sc->rx_ant);
2655
2656 /* set default BSS channel */
2657 rt2560_set_chan(sc, ic->ic_curchan);
2658
2659 /* kick Rx */
2660 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR;
2661 if (ic->ic_opmode != IEEE80211_M_MONITOR) {
2662 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR;
2663 if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
2664 ic->ic_opmode != IEEE80211_M_MBSS)
2665 tmp |= RT2560_DROP_TODS;
2666 if (!(ifp->if_flags & IFF_PROMISC))
2667 tmp |= RT2560_DROP_NOT_TO_ME;
2668 }
2669 RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2670
2671 /* clear old FCS and Rx FIFO errors */
2672 RAL_READ(sc, RT2560_CNT0);
2673 RAL_READ(sc, RT2560_CNT4);
2674
2675 /* clear any pending interrupts */
2676 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff);
2677
2678 /* enable interrupts */
2679 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
2680
2681 ifq_clr_oactive(&ifp->if_snd);
2682 ifp->if_flags |= IFF_RUNNING;
2683
2684 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog_callout, sc);
2685 #undef N
2686 }
2687
2688 static void
2689 rt2560_init(void *priv)
2690 {
2691 struct rt2560_softc *sc = priv;
2692 struct ifnet *ifp = sc->sc_ifp;
2693 struct ieee80211com *ic = ifp->if_l2com;
2694
2695 rt2560_init_locked(sc);
2696
2697 if (ifp->if_flags & IFF_RUNNING)
2698 ieee80211_start_all(ic); /* start all vap's */
2699 }
2700
2701 static void
2702 rt2560_stop_locked(struct rt2560_softc *sc)
2703 {
2704 struct ifnet *ifp = sc->sc_ifp;
2705 volatile int *flags = &sc->sc_flags;
2706
2707 while (*flags & RT2560_F_INPUT_RUNNING)
2708 zsleep(sc, &wlan_global_serializer, 0, "ralrunning", hz/10);
2709
2710 callout_stop(&sc->watchdog_ch);
2711 sc->sc_tx_timer = 0;
2712
2713 if (ifp->if_flags & IFF_RUNNING) {
2714 ifp->if_flags &= ~IFF_RUNNING;
2715 ifq_clr_oactive(&ifp->if_snd);
2716
2717 /* abort Tx */
2718 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX);
2719
2720 /* disable Rx */
2721 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX);
2722
2723 /* reset ASIC (imply reset BBP) */
2724 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2725 RAL_WRITE(sc, RT2560_CSR1, 0);
2726
2727 /* disable interrupts */
2728 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
2729
2730 /* reset Tx and Rx rings */
2731 rt2560_reset_tx_ring(sc, &sc->txq);
2732 rt2560_reset_tx_ring(sc, &sc->atimq);
2733 rt2560_reset_tx_ring(sc, &sc->prioq);
2734 rt2560_reset_tx_ring(sc, &sc->bcnq);
2735 rt2560_reset_rx_ring(sc, &sc->rxq);
2736 }
2737 sc->sc_flags &= ~(RT2560_F_PRIO_OACTIVE | RT2560_F_DATA_OACTIVE);
2738 }
2739
2740 void
2741 rt2560_stop(void *arg)
2742 {
2743 struct rt2560_softc *sc = arg;
2744
2745 rt2560_stop_locked(sc);
2746 }
2747
2748 static int
2749 rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2750 const struct ieee80211_bpf_params *params)
2751 {
2752 struct ieee80211com *ic = ni->ni_ic;
2753 struct ifnet *ifp = ic->ic_ifp;
2754 struct rt2560_softc *sc = ifp->if_softc;
2755
2756 /* prevent management frames from being sent if we're not ready */
2757 if (!(ifp->if_flags & IFF_RUNNING)) {
2758 m_freem(m);
2759 ieee80211_free_node(ni);
2760 return ENETDOWN;
2761 }
2762 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) {
2763 ifq_set_oactive(&ifp->if_snd);
2764 sc->sc_flags |= RT2560_F_PRIO_OACTIVE;
2765 m_freem(m);
2766 ieee80211_free_node(ni);
2767 return ENOBUFS; /* XXX */
2768 }
2769
2770 IFNET_STAT_INC(ifp, opackets, 1);
2771
2772 if (params == NULL) {
2773 /*
2774 * Legacy path; interpret frame contents to decide
2775 * precisely how to send the frame.
2776 */
2777 if (rt2560_tx_mgt(sc, m, ni) != 0)
2778 goto bad;
2779 } else {
2780 /*
2781 * Caller supplied explicit parameters to use in
2782 * sending the frame.
2783 */
2784 if (rt2560_tx_raw(sc, m, ni, params))
2785 goto bad;
2786 }
2787 sc->sc_tx_timer = 5;
2788
2789 return 0;
2790 bad:
2791 IFNET_STAT_INC(ifp, oerrors, 1);
2792 ieee80211_free_node(ni);
2793 return EIO; /* XXX */
2794 }
Cache object: 983d03dbbd2afb850ad627ee4ca5c371
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