1
2 /*-
3 * Copyright (c) 2005, 2006
4 * Damien Bergamini <damien.bergamini@free.fr>
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 #include <sys/cdefs.h>
20 /*-
21 * Ralink Technology RT2560 chipset driver
22 * http://www.ralinktech.com/
23 */
24
25 #include <sys/param.h>
26 #include <sys/sysctl.h>
27 #include <sys/sockio.h>
28 #include <sys/mbuf.h>
29 #include <sys/kernel.h>
30 #include <sys/socket.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/lock.h>
34 #include <sys/mutex.h>
35 #include <sys/module.h>
36 #include <sys/bus.h>
37 #include <sys/endian.h>
38
39 #include <machine/bus.h>
40 #include <machine/resource.h>
41 #include <sys/rman.h>
42
43 #include <net/bpf.h>
44 #include <net/if.h>
45 #include <net/if_var.h>
46 #include <net/if_arp.h>
47 #include <net/ethernet.h>
48 #include <net/if_dl.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51
52 #include <net80211/ieee80211_var.h>
53 #include <net80211/ieee80211_radiotap.h>
54 #include <net80211/ieee80211_regdomain.h>
55 #include <net80211/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/ral/rt2560reg.h>
64 #include <dev/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 printf(fmt, __VA_ARGS__); \
75 } while (0)
76 #define DPRINTFN(sc, n, fmt, ...) do { \
77 if (sc->sc_debug >= (n)) \
78 printf(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 [IFNAMSIZ], int, enum ieee80211_opmode,
87 int, const uint8_t [IEEE80211_ADDR_LEN],
88 const uint8_t [IEEE80211_ADDR_LEN]);
89 static void rt2560_vap_delete(struct ieee80211vap *);
90 static void rt2560_dma_map_addr(void *, bus_dma_segment_t *, int,
91 int);
92 static int rt2560_alloc_tx_ring(struct rt2560_softc *,
93 struct rt2560_tx_ring *, int);
94 static void rt2560_reset_tx_ring(struct rt2560_softc *,
95 struct rt2560_tx_ring *);
96 static void rt2560_free_tx_ring(struct rt2560_softc *,
97 struct rt2560_tx_ring *);
98 static int rt2560_alloc_rx_ring(struct rt2560_softc *,
99 struct rt2560_rx_ring *, int);
100 static void rt2560_reset_rx_ring(struct rt2560_softc *,
101 struct rt2560_rx_ring *);
102 static void rt2560_free_rx_ring(struct rt2560_softc *,
103 struct rt2560_rx_ring *);
104 static int rt2560_newstate(struct ieee80211vap *,
105 enum ieee80211_state, int);
106 static uint16_t rt2560_eeprom_read(struct rt2560_softc *, uint8_t);
107 static void rt2560_encryption_intr(struct rt2560_softc *);
108 static void rt2560_tx_intr(struct rt2560_softc *);
109 static void rt2560_prio_intr(struct rt2560_softc *);
110 static void rt2560_decryption_intr(struct rt2560_softc *);
111 static void rt2560_rx_intr(struct rt2560_softc *);
112 static void rt2560_beacon_update(struct ieee80211vap *, int item);
113 static void rt2560_beacon_expire(struct rt2560_softc *);
114 static void rt2560_wakeup_expire(struct rt2560_softc *);
115 static void rt2560_scan_start(struct ieee80211com *);
116 static void rt2560_scan_end(struct ieee80211com *);
117 static void rt2560_getradiocaps(struct ieee80211com *, int, int *,
118 struct ieee80211_channel[]);
119 static void rt2560_set_channel(struct ieee80211com *);
120 static void rt2560_setup_tx_desc(struct rt2560_softc *,
121 struct rt2560_tx_desc *, uint32_t, int, int, int,
122 bus_addr_t);
123 static int rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *,
124 struct ieee80211_node *);
125 static int rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *,
126 struct ieee80211_node *);
127 static int rt2560_tx_data(struct rt2560_softc *, struct mbuf *,
128 struct ieee80211_node *);
129 static int rt2560_transmit(struct ieee80211com *, struct mbuf *);
130 static void rt2560_start(struct rt2560_softc *);
131 static void rt2560_watchdog(void *);
132 static void rt2560_parent(struct ieee80211com *);
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 ieee80211com *);
147 static void rt2560_set_basicrates(struct rt2560_softc *,
148 const struct ieee80211_rateset *);
149 static void rt2560_update_led(struct rt2560_softc *, int, int);
150 static void rt2560_set_bssid(struct rt2560_softc *, const uint8_t *);
151 static void rt2560_set_macaddr(struct rt2560_softc *,
152 const uint8_t *);
153 static void rt2560_get_macaddr(struct rt2560_softc *, uint8_t *);
154 static void rt2560_update_promisc(struct ieee80211com *);
155 static const char *rt2560_get_rf(int);
156 static void rt2560_read_config(struct rt2560_softc *);
157 static int rt2560_bbp_init(struct rt2560_softc *);
158 static void rt2560_set_txantenna(struct rt2560_softc *, int);
159 static void rt2560_set_rxantenna(struct rt2560_softc *, int);
160 static void rt2560_init_locked(struct rt2560_softc *);
161 static void rt2560_init(void *);
162 static void rt2560_stop_locked(struct rt2560_softc *);
163 static int rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *,
164 const struct ieee80211_bpf_params *);
165
166 static const struct {
167 uint32_t reg;
168 uint32_t val;
169 } rt2560_def_mac[] = {
170 RT2560_DEF_MAC
171 };
172
173 static const struct {
174 uint8_t reg;
175 uint8_t val;
176 } rt2560_def_bbp[] = {
177 RT2560_DEF_BBP
178 };
179
180 static const uint32_t rt2560_rf2522_r2[] = RT2560_RF2522_R2;
181 static const uint32_t rt2560_rf2523_r2[] = RT2560_RF2523_R2;
182 static const uint32_t rt2560_rf2524_r2[] = RT2560_RF2524_R2;
183 static const uint32_t rt2560_rf2525_r2[] = RT2560_RF2525_R2;
184 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2;
185 static const uint32_t rt2560_rf2525e_r2[] = RT2560_RF2525E_R2;
186 static const uint32_t rt2560_rf2526_r2[] = RT2560_RF2526_R2;
187 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2;
188
189 static const uint8_t rt2560_chan_5ghz[] =
190 { 36, 40, 44, 48, 52, 56, 60, 64,
191 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140,
192 149, 153, 157, 161 };
193
194 static const struct {
195 uint8_t chan;
196 uint32_t r1, r2, r4;
197 } rt2560_rf5222[] = {
198 RT2560_RF5222
199 };
200
201 int
rt2560_attach(device_t dev,int id)202 rt2560_attach(device_t dev, int id)
203 {
204 struct rt2560_softc *sc = device_get_softc(dev);
205 struct ieee80211com *ic = &sc->sc_ic;
206 int error;
207
208 sc->sc_dev = dev;
209
210 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
211 MTX_DEF | MTX_RECURSE);
212
213 callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0);
214 mbufq_init(&sc->sc_snd, ifqmaxlen);
215
216 /* retrieve RT2560 rev. no */
217 sc->asic_rev = RAL_READ(sc, RT2560_CSR0);
218
219 /* retrieve RF rev. no and various other things from EEPROM */
220 rt2560_read_config(sc);
221
222 device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n",
223 sc->asic_rev, rt2560_get_rf(sc->rf_rev));
224
225 /*
226 * Allocate Tx and Rx rings.
227 */
228 error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT);
229 if (error != 0) {
230 device_printf(sc->sc_dev, "could not allocate Tx ring\n");
231 goto fail1;
232 }
233
234 error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT);
235 if (error != 0) {
236 device_printf(sc->sc_dev, "could not allocate ATIM ring\n");
237 goto fail2;
238 }
239
240 error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT);
241 if (error != 0) {
242 device_printf(sc->sc_dev, "could not allocate Prio ring\n");
243 goto fail3;
244 }
245
246 error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT);
247 if (error != 0) {
248 device_printf(sc->sc_dev, "could not allocate Beacon ring\n");
249 goto fail4;
250 }
251
252 error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT);
253 if (error != 0) {
254 device_printf(sc->sc_dev, "could not allocate Rx ring\n");
255 goto fail5;
256 }
257
258 /* retrieve MAC address */
259 rt2560_get_macaddr(sc, ic->ic_macaddr);
260
261 ic->ic_softc = sc;
262 ic->ic_name = device_get_nameunit(dev);
263 ic->ic_opmode = IEEE80211_M_STA;
264 ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
265
266 /* set device capabilities */
267 ic->ic_caps =
268 IEEE80211_C_STA /* station mode */
269 | IEEE80211_C_IBSS /* ibss, nee adhoc, mode */
270 | IEEE80211_C_HOSTAP /* hostap mode */
271 | IEEE80211_C_MONITOR /* monitor mode */
272 | IEEE80211_C_AHDEMO /* adhoc demo mode */
273 | IEEE80211_C_WDS /* 4-address traffic works */
274 | IEEE80211_C_MBSS /* mesh point link mode */
275 | IEEE80211_C_SHPREAMBLE /* short preamble supported */
276 | IEEE80211_C_SHSLOT /* short slot time supported */
277 | IEEE80211_C_WPA /* capable of WPA1+WPA2 */
278 | IEEE80211_C_BGSCAN /* capable of bg scanning */
279 #ifdef notyet
280 | IEEE80211_C_TXFRAG /* handle tx frags */
281 #endif
282 ;
283
284 ic->ic_flags_ext |= IEEE80211_FEXT_SEQNO_OFFLOAD;
285
286 rt2560_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
287 ic->ic_channels);
288
289 ieee80211_ifattach(ic);
290 ic->ic_raw_xmit = rt2560_raw_xmit;
291 ic->ic_updateslot = rt2560_update_slot;
292 ic->ic_update_promisc = rt2560_update_promisc;
293 ic->ic_scan_start = rt2560_scan_start;
294 ic->ic_scan_end = rt2560_scan_end;
295 ic->ic_getradiocaps = rt2560_getradiocaps;
296 ic->ic_set_channel = rt2560_set_channel;
297
298 ic->ic_vap_create = rt2560_vap_create;
299 ic->ic_vap_delete = rt2560_vap_delete;
300 ic->ic_parent = rt2560_parent;
301 ic->ic_transmit = rt2560_transmit;
302
303 ieee80211_radiotap_attach(ic,
304 &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
305 RT2560_TX_RADIOTAP_PRESENT,
306 &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
307 RT2560_RX_RADIOTAP_PRESENT);
308
309 /*
310 * Add a few sysctl knobs.
311 */
312 #ifdef RAL_DEBUG
313 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
314 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
315 "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs");
316 #endif
317 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
318 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
319 "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)");
320
321 SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
322 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
323 "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)");
324
325 if (bootverbose)
326 ieee80211_announce(ic);
327
328 return 0;
329
330 fail5: rt2560_free_tx_ring(sc, &sc->bcnq);
331 fail4: rt2560_free_tx_ring(sc, &sc->prioq);
332 fail3: rt2560_free_tx_ring(sc, &sc->atimq);
333 fail2: rt2560_free_tx_ring(sc, &sc->txq);
334 fail1: mtx_destroy(&sc->sc_mtx);
335
336 return ENXIO;
337 }
338
339 int
rt2560_detach(void * xsc)340 rt2560_detach(void *xsc)
341 {
342 struct rt2560_softc *sc = xsc;
343 struct ieee80211com *ic = &sc->sc_ic;
344
345 rt2560_stop(sc);
346
347 ieee80211_ifdetach(ic);
348 mbufq_drain(&sc->sc_snd);
349
350 rt2560_free_tx_ring(sc, &sc->txq);
351 rt2560_free_tx_ring(sc, &sc->atimq);
352 rt2560_free_tx_ring(sc, &sc->prioq);
353 rt2560_free_tx_ring(sc, &sc->bcnq);
354 rt2560_free_rx_ring(sc, &sc->rxq);
355
356 mtx_destroy(&sc->sc_mtx);
357
358 return 0;
359 }
360
361 static struct ieee80211vap *
rt2560_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])362 rt2560_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
363 enum ieee80211_opmode opmode, int flags,
364 const uint8_t bssid[IEEE80211_ADDR_LEN],
365 const uint8_t mac[IEEE80211_ADDR_LEN])
366 {
367 struct rt2560_softc *sc = ic->ic_softc;
368 struct rt2560_vap *rvp;
369 struct ieee80211vap *vap;
370
371 switch (opmode) {
372 case IEEE80211_M_STA:
373 case IEEE80211_M_IBSS:
374 case IEEE80211_M_AHDEMO:
375 case IEEE80211_M_MONITOR:
376 case IEEE80211_M_HOSTAP:
377 case IEEE80211_M_MBSS:
378 /* XXXRP: TBD */
379 if (!TAILQ_EMPTY(&ic->ic_vaps)) {
380 device_printf(sc->sc_dev, "only 1 vap supported\n");
381 return NULL;
382 }
383 if (opmode == IEEE80211_M_STA)
384 flags |= IEEE80211_CLONE_NOBEACONS;
385 break;
386 case IEEE80211_M_WDS:
387 if (TAILQ_EMPTY(&ic->ic_vaps) ||
388 ic->ic_opmode != IEEE80211_M_HOSTAP) {
389 device_printf(sc->sc_dev,
390 "wds only supported in ap mode\n");
391 return NULL;
392 }
393 /*
394 * Silently remove any request for a unique
395 * bssid; WDS vap's always share the local
396 * mac address.
397 */
398 flags &= ~IEEE80211_CLONE_BSSID;
399 break;
400 default:
401 device_printf(sc->sc_dev, "unknown opmode %d\n", opmode);
402 return NULL;
403 }
404 rvp = malloc(sizeof(struct rt2560_vap), M_80211_VAP, M_WAITOK | M_ZERO);
405 vap = &rvp->ral_vap;
406 ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid);
407
408 /* override state transition machine */
409 rvp->ral_newstate = vap->iv_newstate;
410 vap->iv_newstate = rt2560_newstate;
411 vap->iv_update_beacon = rt2560_beacon_update;
412
413 ieee80211_ratectl_init(vap);
414 /* complete setup */
415 ieee80211_vap_attach(vap, ieee80211_media_change,
416 ieee80211_media_status, mac);
417 if (TAILQ_FIRST(&ic->ic_vaps) == vap)
418 ic->ic_opmode = opmode;
419 return vap;
420 }
421
422 static void
rt2560_vap_delete(struct ieee80211vap * vap)423 rt2560_vap_delete(struct ieee80211vap *vap)
424 {
425 struct rt2560_vap *rvp = RT2560_VAP(vap);
426
427 ieee80211_ratectl_deinit(vap);
428 ieee80211_vap_detach(vap);
429 free(rvp, M_80211_VAP);
430 }
431
432 void
rt2560_resume(void * xsc)433 rt2560_resume(void *xsc)
434 {
435 struct rt2560_softc *sc = xsc;
436
437 if (sc->sc_ic.ic_nrunning > 0)
438 rt2560_init(sc);
439 }
440
441 static void
rt2560_dma_map_addr(void * arg,bus_dma_segment_t * segs,int nseg,int error)442 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
443 {
444 if (error != 0)
445 return;
446
447 KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
448
449 *(bus_addr_t *)arg = segs[0].ds_addr;
450 }
451
452 static int
rt2560_alloc_tx_ring(struct rt2560_softc * sc,struct rt2560_tx_ring * ring,int count)453 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring,
454 int count)
455 {
456 int i, error;
457
458 ring->count = count;
459 ring->queued = 0;
460 ring->cur = ring->next = 0;
461 ring->cur_encrypt = ring->next_encrypt = 0;
462
463 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
464 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
465 count * RT2560_TX_DESC_SIZE, 1, count * RT2560_TX_DESC_SIZE,
466 0, NULL, NULL, &ring->desc_dmat);
467 if (error != 0) {
468 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
469 goto fail;
470 }
471
472 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
473 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
474 if (error != 0) {
475 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
476 goto fail;
477 }
478
479 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
480 count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
481 0);
482 if (error != 0) {
483 device_printf(sc->sc_dev, "could not load desc DMA map\n");
484 goto fail;
485 }
486
487 ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF,
488 M_NOWAIT | M_ZERO);
489 if (ring->data == NULL) {
490 device_printf(sc->sc_dev, "could not allocate soft data\n");
491 error = ENOMEM;
492 goto fail;
493 }
494
495 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
496 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
497 MCLBYTES, RT2560_MAX_SCATTER, MCLBYTES, 0, NULL, NULL,
498 &ring->data_dmat);
499 if (error != 0) {
500 device_printf(sc->sc_dev, "could not create data DMA tag\n");
501 goto fail;
502 }
503
504 for (i = 0; i < count; i++) {
505 error = bus_dmamap_create(ring->data_dmat, 0,
506 &ring->data[i].map);
507 if (error != 0) {
508 device_printf(sc->sc_dev, "could not create DMA map\n");
509 goto fail;
510 }
511 }
512
513 return 0;
514
515 fail: rt2560_free_tx_ring(sc, ring);
516 return error;
517 }
518
519 static void
rt2560_reset_tx_ring(struct rt2560_softc * sc,struct rt2560_tx_ring * ring)520 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
521 {
522 struct rt2560_tx_desc *desc;
523 struct rt2560_tx_data *data;
524 int i;
525
526 for (i = 0; i < ring->count; i++) {
527 desc = &ring->desc[i];
528 data = &ring->data[i];
529
530 if (data->m != NULL) {
531 bus_dmamap_sync(ring->data_dmat, data->map,
532 BUS_DMASYNC_POSTWRITE);
533 bus_dmamap_unload(ring->data_dmat, data->map);
534 m_freem(data->m);
535 data->m = NULL;
536 }
537
538 if (data->ni != NULL) {
539 ieee80211_free_node(data->ni);
540 data->ni = NULL;
541 }
542
543 desc->flags = 0;
544 }
545
546 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
547
548 ring->queued = 0;
549 ring->cur = ring->next = 0;
550 ring->cur_encrypt = ring->next_encrypt = 0;
551 }
552
553 static void
rt2560_free_tx_ring(struct rt2560_softc * sc,struct rt2560_tx_ring * ring)554 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
555 {
556 struct rt2560_tx_data *data;
557 int i;
558
559 if (ring->desc != NULL) {
560 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
561 BUS_DMASYNC_POSTWRITE);
562 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
563 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
564 }
565
566 if (ring->desc_dmat != NULL)
567 bus_dma_tag_destroy(ring->desc_dmat);
568
569 if (ring->data != NULL) {
570 for (i = 0; i < ring->count; i++) {
571 data = &ring->data[i];
572
573 if (data->m != NULL) {
574 bus_dmamap_sync(ring->data_dmat, data->map,
575 BUS_DMASYNC_POSTWRITE);
576 bus_dmamap_unload(ring->data_dmat, data->map);
577 m_freem(data->m);
578 }
579
580 if (data->ni != NULL)
581 ieee80211_free_node(data->ni);
582
583 if (data->map != NULL)
584 bus_dmamap_destroy(ring->data_dmat, data->map);
585 }
586
587 free(ring->data, M_DEVBUF);
588 }
589
590 if (ring->data_dmat != NULL)
591 bus_dma_tag_destroy(ring->data_dmat);
592 }
593
594 static int
rt2560_alloc_rx_ring(struct rt2560_softc * sc,struct rt2560_rx_ring * ring,int count)595 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring,
596 int count)
597 {
598 struct rt2560_rx_desc *desc;
599 struct rt2560_rx_data *data;
600 bus_addr_t physaddr;
601 int i, error;
602
603 ring->count = count;
604 ring->cur = ring->next = 0;
605 ring->cur_decrypt = 0;
606
607 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
608 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
609 count * RT2560_RX_DESC_SIZE, 1, count * RT2560_RX_DESC_SIZE,
610 0, NULL, NULL, &ring->desc_dmat);
611 if (error != 0) {
612 device_printf(sc->sc_dev, "could not create desc DMA tag\n");
613 goto fail;
614 }
615
616 error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
617 BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
618 if (error != 0) {
619 device_printf(sc->sc_dev, "could not allocate DMA memory\n");
620 goto fail;
621 }
622
623 error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
624 count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
625 0);
626 if (error != 0) {
627 device_printf(sc->sc_dev, "could not load desc DMA map\n");
628 goto fail;
629 }
630
631 ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF,
632 M_NOWAIT | M_ZERO);
633 if (ring->data == NULL) {
634 device_printf(sc->sc_dev, "could not allocate soft data\n");
635 error = ENOMEM;
636 goto fail;
637 }
638
639 /*
640 * Pre-allocate Rx buffers and populate Rx ring.
641 */
642 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
643 BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
644 1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
645 if (error != 0) {
646 device_printf(sc->sc_dev, "could not create data DMA tag\n");
647 goto fail;
648 }
649
650 for (i = 0; i < count; i++) {
651 desc = &sc->rxq.desc[i];
652 data = &sc->rxq.data[i];
653
654 error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
655 if (error != 0) {
656 device_printf(sc->sc_dev, "could not create DMA map\n");
657 goto fail;
658 }
659
660 data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
661 if (data->m == NULL) {
662 device_printf(sc->sc_dev,
663 "could not allocate rx mbuf\n");
664 error = ENOMEM;
665 goto fail;
666 }
667
668 error = bus_dmamap_load(ring->data_dmat, data->map,
669 mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr,
670 &physaddr, 0);
671 if (error != 0) {
672 device_printf(sc->sc_dev,
673 "could not load rx buf DMA map");
674 goto fail;
675 }
676
677 desc->flags = htole32(RT2560_RX_BUSY);
678 desc->physaddr = htole32(physaddr);
679 }
680
681 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
682
683 return 0;
684
685 fail: rt2560_free_rx_ring(sc, ring);
686 return error;
687 }
688
689 static void
rt2560_reset_rx_ring(struct rt2560_softc * sc,struct rt2560_rx_ring * ring)690 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
691 {
692 int i;
693
694 for (i = 0; i < ring->count; i++) {
695 ring->desc[i].flags = htole32(RT2560_RX_BUSY);
696 ring->data[i].drop = 0;
697 }
698
699 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
700
701 ring->cur = ring->next = 0;
702 ring->cur_decrypt = 0;
703 }
704
705 static void
rt2560_free_rx_ring(struct rt2560_softc * sc,struct rt2560_rx_ring * ring)706 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
707 {
708 struct rt2560_rx_data *data;
709 int i;
710
711 if (ring->desc != NULL) {
712 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
713 BUS_DMASYNC_POSTWRITE);
714 bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
715 bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
716 }
717
718 if (ring->desc_dmat != NULL)
719 bus_dma_tag_destroy(ring->desc_dmat);
720
721 if (ring->data != NULL) {
722 for (i = 0; i < ring->count; i++) {
723 data = &ring->data[i];
724
725 if (data->m != NULL) {
726 bus_dmamap_sync(ring->data_dmat, data->map,
727 BUS_DMASYNC_POSTREAD);
728 bus_dmamap_unload(ring->data_dmat, data->map);
729 m_freem(data->m);
730 }
731
732 if (data->map != NULL)
733 bus_dmamap_destroy(ring->data_dmat, data->map);
734 }
735
736 free(ring->data, M_DEVBUF);
737 }
738
739 if (ring->data_dmat != NULL)
740 bus_dma_tag_destroy(ring->data_dmat);
741 }
742
743 static int
rt2560_newstate(struct ieee80211vap * vap,enum ieee80211_state nstate,int arg)744 rt2560_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
745 {
746 struct rt2560_vap *rvp = RT2560_VAP(vap);
747 struct rt2560_softc *sc = vap->iv_ic->ic_softc;
748 int error;
749
750 if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) {
751 /* abort TSF synchronization */
752 RAL_WRITE(sc, RT2560_CSR14, 0);
753
754 /* turn association led off */
755 rt2560_update_led(sc, 0, 0);
756 }
757
758 error = rvp->ral_newstate(vap, nstate, arg);
759
760 if (error == 0 && nstate == IEEE80211_S_RUN) {
761 struct ieee80211_node *ni = vap->iv_bss;
762 struct mbuf *m;
763
764 if (vap->iv_opmode != IEEE80211_M_MONITOR) {
765 rt2560_update_plcp(sc);
766 rt2560_set_basicrates(sc, &ni->ni_rates);
767 rt2560_set_bssid(sc, ni->ni_bssid);
768 }
769
770 if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
771 vap->iv_opmode == IEEE80211_M_IBSS ||
772 vap->iv_opmode == IEEE80211_M_MBSS) {
773 m = ieee80211_beacon_alloc(ni);
774 if (m == NULL) {
775 device_printf(sc->sc_dev,
776 "could not allocate beacon\n");
777 return ENOBUFS;
778 }
779 ieee80211_ref_node(ni);
780 error = rt2560_tx_bcn(sc, m, ni);
781 if (error != 0)
782 return error;
783 }
784
785 /* turn association led on */
786 rt2560_update_led(sc, 1, 0);
787
788 if (vap->iv_opmode != IEEE80211_M_MONITOR)
789 rt2560_enable_tsf_sync(sc);
790 else
791 rt2560_enable_tsf(sc);
792 }
793 return error;
794 }
795
796 /*
797 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or
798 * 93C66).
799 */
800 static uint16_t
rt2560_eeprom_read(struct rt2560_softc * sc,uint8_t addr)801 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr)
802 {
803 uint32_t tmp;
804 uint16_t val;
805 int n;
806
807 /* clock C once before the first command */
808 RT2560_EEPROM_CTL(sc, 0);
809
810 RT2560_EEPROM_CTL(sc, RT2560_S);
811 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
812 RT2560_EEPROM_CTL(sc, RT2560_S);
813
814 /* write start bit (1) */
815 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
816 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
817
818 /* write READ opcode (10) */
819 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
820 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
821 RT2560_EEPROM_CTL(sc, RT2560_S);
822 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
823
824 /* write address (A5-A0 or A7-A0) */
825 n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7;
826 for (; n >= 0; n--) {
827 RT2560_EEPROM_CTL(sc, RT2560_S |
828 (((addr >> n) & 1) << RT2560_SHIFT_D));
829 RT2560_EEPROM_CTL(sc, RT2560_S |
830 (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C);
831 }
832
833 RT2560_EEPROM_CTL(sc, RT2560_S);
834
835 /* read data Q15-Q0 */
836 val = 0;
837 for (n = 15; n >= 0; n--) {
838 RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
839 tmp = RAL_READ(sc, RT2560_CSR21);
840 val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n;
841 RT2560_EEPROM_CTL(sc, RT2560_S);
842 }
843
844 RT2560_EEPROM_CTL(sc, 0);
845
846 /* clear Chip Select and clock C */
847 RT2560_EEPROM_CTL(sc, RT2560_S);
848 RT2560_EEPROM_CTL(sc, 0);
849 RT2560_EEPROM_CTL(sc, RT2560_C);
850
851 return val;
852 }
853
854 /*
855 * Some frames were processed by the hardware cipher engine and are ready for
856 * transmission.
857 */
858 static void
rt2560_encryption_intr(struct rt2560_softc * sc)859 rt2560_encryption_intr(struct rt2560_softc *sc)
860 {
861 struct rt2560_tx_desc *desc;
862 int hw;
863
864 /* retrieve last descriptor index processed by cipher engine */
865 hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr;
866 hw /= RT2560_TX_DESC_SIZE;
867
868 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
869 BUS_DMASYNC_POSTREAD);
870
871 while (sc->txq.next_encrypt != hw) {
872 if (sc->txq.next_encrypt == sc->txq.cur_encrypt) {
873 printf("hw encrypt %d, cur_encrypt %d\n", hw,
874 sc->txq.cur_encrypt);
875 break;
876 }
877
878 desc = &sc->txq.desc[sc->txq.next_encrypt];
879
880 if ((le32toh(desc->flags) & RT2560_TX_BUSY) ||
881 (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY))
882 break;
883
884 /* for TKIP, swap eiv field to fix a bug in ASIC */
885 if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) ==
886 RT2560_TX_CIPHER_TKIP)
887 desc->eiv = bswap32(desc->eiv);
888
889 /* mark the frame ready for transmission */
890 desc->flags |= htole32(RT2560_TX_VALID);
891 desc->flags |= htole32(RT2560_TX_BUSY);
892
893 DPRINTFN(sc, 15, "encryption done idx=%u\n",
894 sc->txq.next_encrypt);
895
896 sc->txq.next_encrypt =
897 (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT;
898 }
899
900 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
901 BUS_DMASYNC_PREWRITE);
902
903 /* kick Tx */
904 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX);
905 }
906
907 static void
rt2560_tx_intr(struct rt2560_softc * sc)908 rt2560_tx_intr(struct rt2560_softc *sc)
909 {
910 struct ieee80211_ratectl_tx_status *txs = &sc->sc_txs;
911 struct rt2560_tx_desc *desc;
912 struct rt2560_tx_data *data;
913 struct mbuf *m;
914 struct ieee80211_node *ni;
915 uint32_t flags;
916 int status;
917
918 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
919 BUS_DMASYNC_POSTREAD);
920
921 txs->flags = IEEE80211_RATECTL_STATUS_LONG_RETRY;
922 for (;;) {
923 desc = &sc->txq.desc[sc->txq.next];
924 data = &sc->txq.data[sc->txq.next];
925
926 flags = le32toh(desc->flags);
927 if ((flags & RT2560_TX_BUSY) ||
928 (flags & RT2560_TX_CIPHER_BUSY) ||
929 !(flags & RT2560_TX_VALID))
930 break;
931
932 m = data->m;
933 ni = data->ni;
934
935 switch (flags & RT2560_TX_RESULT_MASK) {
936 case RT2560_TX_SUCCESS:
937 txs->status = IEEE80211_RATECTL_TX_SUCCESS;
938 txs->long_retries = 0;
939
940 DPRINTFN(sc, 10, "%s\n", "data frame sent successfully");
941 if (data->rix != IEEE80211_FIXED_RATE_NONE)
942 ieee80211_ratectl_tx_complete(ni, txs);
943 status = 0;
944 break;
945
946 case RT2560_TX_SUCCESS_RETRY:
947 txs->status = IEEE80211_RATECTL_TX_SUCCESS;
948 txs->long_retries = RT2560_TX_RETRYCNT(flags);
949
950 DPRINTFN(sc, 9, "data frame sent after %u retries\n",
951 txs->long_retries);
952 if (data->rix != IEEE80211_FIXED_RATE_NONE)
953 ieee80211_ratectl_tx_complete(ni, txs);
954 status = 0;
955 break;
956
957 case RT2560_TX_FAIL_RETRY:
958 txs->status = IEEE80211_RATECTL_TX_FAIL_LONG;
959 txs->long_retries = RT2560_TX_RETRYCNT(flags);
960
961 DPRINTFN(sc, 9, "data frame failed after %d retries\n",
962 txs->long_retries);
963 if (data->rix != IEEE80211_FIXED_RATE_NONE)
964 ieee80211_ratectl_tx_complete(ni, txs);
965 status = 1;
966 break;
967
968 case RT2560_TX_FAIL_INVALID:
969 case RT2560_TX_FAIL_OTHER:
970 default:
971 device_printf(sc->sc_dev, "sending data frame failed "
972 "0x%08x\n", flags);
973 status = 1;
974 }
975
976 bus_dmamap_sync(sc->txq.data_dmat, data->map,
977 BUS_DMASYNC_POSTWRITE);
978 bus_dmamap_unload(sc->txq.data_dmat, data->map);
979
980 ieee80211_tx_complete(ni, m, status);
981 data->ni = NULL;
982 data->m = NULL;
983
984 /* descriptor is no longer valid */
985 desc->flags &= ~htole32(RT2560_TX_VALID);
986
987 DPRINTFN(sc, 15, "tx done idx=%u\n", sc->txq.next);
988
989 sc->txq.queued--;
990 sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT;
991 }
992
993 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
994 BUS_DMASYNC_PREWRITE);
995
996 if (sc->prioq.queued == 0 && sc->txq.queued == 0)
997 sc->sc_tx_timer = 0;
998
999 if (sc->txq.queued < RT2560_TX_RING_COUNT - 1)
1000 rt2560_start(sc);
1001 }
1002
1003 static void
rt2560_prio_intr(struct rt2560_softc * sc)1004 rt2560_prio_intr(struct rt2560_softc *sc)
1005 {
1006 struct rt2560_tx_desc *desc;
1007 struct rt2560_tx_data *data;
1008 struct ieee80211_node *ni;
1009 struct mbuf *m;
1010 int flags;
1011
1012 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1013 BUS_DMASYNC_POSTREAD);
1014
1015 for (;;) {
1016 desc = &sc->prioq.desc[sc->prioq.next];
1017 data = &sc->prioq.data[sc->prioq.next];
1018
1019 flags = le32toh(desc->flags);
1020 if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0)
1021 break;
1022
1023 switch (flags & RT2560_TX_RESULT_MASK) {
1024 case RT2560_TX_SUCCESS:
1025 DPRINTFN(sc, 10, "%s\n", "mgt frame sent successfully");
1026 break;
1027
1028 case RT2560_TX_SUCCESS_RETRY:
1029 DPRINTFN(sc, 9, "mgt frame sent after %u retries\n",
1030 (flags >> 5) & 0x7);
1031 break;
1032
1033 case RT2560_TX_FAIL_RETRY:
1034 DPRINTFN(sc, 9, "%s\n",
1035 "sending mgt frame failed (too much retries)");
1036 break;
1037
1038 case RT2560_TX_FAIL_INVALID:
1039 case RT2560_TX_FAIL_OTHER:
1040 default:
1041 device_printf(sc->sc_dev, "sending mgt frame failed "
1042 "0x%08x\n", flags);
1043 break;
1044 }
1045
1046 bus_dmamap_sync(sc->prioq.data_dmat, data->map,
1047 BUS_DMASYNC_POSTWRITE);
1048 bus_dmamap_unload(sc->prioq.data_dmat, data->map);
1049
1050 m = data->m;
1051 data->m = NULL;
1052 ni = data->ni;
1053 data->ni = NULL;
1054
1055 /* descriptor is no longer valid */
1056 desc->flags &= ~htole32(RT2560_TX_VALID);
1057
1058 DPRINTFN(sc, 15, "prio done idx=%u\n", sc->prioq.next);
1059
1060 sc->prioq.queued--;
1061 sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT;
1062
1063 if (m->m_flags & M_TXCB)
1064 ieee80211_process_callback(ni, m,
1065 (flags & RT2560_TX_RESULT_MASK) &~
1066 (RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY));
1067 m_freem(m);
1068 ieee80211_free_node(ni);
1069 }
1070
1071 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1072 BUS_DMASYNC_PREWRITE);
1073
1074 if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1075 sc->sc_tx_timer = 0;
1076
1077 if (sc->prioq.queued < RT2560_PRIO_RING_COUNT)
1078 rt2560_start(sc);
1079 }
1080
1081 /*
1082 * Some frames were processed by the hardware cipher engine and are ready for
1083 * handoff to the IEEE802.11 layer.
1084 */
1085 static void
rt2560_decryption_intr(struct rt2560_softc * sc)1086 rt2560_decryption_intr(struct rt2560_softc *sc)
1087 {
1088 struct ieee80211com *ic = &sc->sc_ic;
1089 struct rt2560_rx_desc *desc;
1090 struct rt2560_rx_data *data;
1091 bus_addr_t physaddr;
1092 struct ieee80211_frame *wh;
1093 struct ieee80211_node *ni;
1094 struct mbuf *mnew, *m;
1095 int hw, error;
1096 int8_t rssi, nf;
1097
1098 /* retrieve last descriptor index processed by cipher engine */
1099 hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr;
1100 hw /= RT2560_RX_DESC_SIZE;
1101
1102 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1103 BUS_DMASYNC_POSTREAD);
1104
1105 for (; sc->rxq.cur_decrypt != hw;) {
1106 desc = &sc->rxq.desc[sc->rxq.cur_decrypt];
1107 data = &sc->rxq.data[sc->rxq.cur_decrypt];
1108
1109 if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1110 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1111 break;
1112
1113 if (data->drop) {
1114 counter_u64_add(ic->ic_ierrors, 1);
1115 goto skip;
1116 }
1117
1118 if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 &&
1119 (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) {
1120 counter_u64_add(ic->ic_ierrors, 1);
1121 goto skip;
1122 }
1123
1124 /*
1125 * Try to allocate a new mbuf for this ring element and load it
1126 * before processing the current mbuf. If the ring element
1127 * cannot be loaded, drop the received packet and reuse the old
1128 * mbuf. In the unlikely case that the old mbuf can't be
1129 * reloaded either, explicitly panic.
1130 */
1131 mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1132 if (mnew == NULL) {
1133 counter_u64_add(ic->ic_ierrors, 1);
1134 goto skip;
1135 }
1136
1137 bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1138 BUS_DMASYNC_POSTREAD);
1139 bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1140
1141 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1142 mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr,
1143 &physaddr, 0);
1144 if (error != 0) {
1145 m_freem(mnew);
1146
1147 /* try to reload the old mbuf */
1148 error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1149 mtod(data->m, void *), MCLBYTES,
1150 rt2560_dma_map_addr, &physaddr, 0);
1151 if (error != 0) {
1152 /* very unlikely that it will fail... */
1153 panic("%s: could not load old rx mbuf",
1154 device_get_name(sc->sc_dev));
1155 }
1156 counter_u64_add(ic->ic_ierrors, 1);
1157 goto skip;
1158 }
1159
1160 /*
1161 * New mbuf successfully loaded, update Rx ring and continue
1162 * processing.
1163 */
1164 m = data->m;
1165 data->m = mnew;
1166 desc->physaddr = htole32(physaddr);
1167
1168 /* finalize mbuf */
1169 m->m_pkthdr.len = m->m_len =
1170 (le32toh(desc->flags) >> 16) & 0xfff;
1171
1172 rssi = RT2560_RSSI(sc, desc->rssi);
1173 nf = RT2560_NOISE_FLOOR;
1174 if (ieee80211_radiotap_active(ic)) {
1175 struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap;
1176 uint32_t tsf_lo, tsf_hi;
1177
1178 /* get timestamp (low and high 32 bits) */
1179 tsf_hi = RAL_READ(sc, RT2560_CSR17);
1180 tsf_lo = RAL_READ(sc, RT2560_CSR16);
1181
1182 tap->wr_tsf =
1183 htole64(((uint64_t)tsf_hi << 32) | tsf_lo);
1184 tap->wr_flags = 0;
1185 tap->wr_rate = ieee80211_plcp2rate(desc->rate,
1186 (desc->flags & htole32(RT2560_RX_OFDM)) ?
1187 IEEE80211_T_OFDM : IEEE80211_T_CCK);
1188 tap->wr_antenna = sc->rx_ant;
1189 tap->wr_antsignal = nf + rssi;
1190 tap->wr_antnoise = nf;
1191 }
1192
1193 sc->sc_flags |= RT2560_F_INPUT_RUNNING;
1194 RAL_UNLOCK(sc);
1195 wh = mtod(m, struct ieee80211_frame *);
1196 ni = ieee80211_find_rxnode(ic,
1197 (struct ieee80211_frame_min *)wh);
1198 if (ni != NULL) {
1199 (void) ieee80211_input(ni, m, rssi, nf);
1200 ieee80211_free_node(ni);
1201 } else
1202 (void) ieee80211_input_all(ic, m, rssi, nf);
1203
1204 RAL_LOCK(sc);
1205 sc->sc_flags &= ~RT2560_F_INPUT_RUNNING;
1206 skip: desc->flags = htole32(RT2560_RX_BUSY);
1207
1208 DPRINTFN(sc, 15, "decryption done idx=%u\n", sc->rxq.cur_decrypt);
1209
1210 sc->rxq.cur_decrypt =
1211 (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT;
1212 }
1213
1214 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1215 BUS_DMASYNC_PREWRITE);
1216 }
1217
1218 /*
1219 * Some frames were received. Pass them to the hardware cipher engine before
1220 * sending them to the 802.11 layer.
1221 */
1222 static void
rt2560_rx_intr(struct rt2560_softc * sc)1223 rt2560_rx_intr(struct rt2560_softc *sc)
1224 {
1225 struct rt2560_rx_desc *desc;
1226 struct rt2560_rx_data *data;
1227
1228 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1229 BUS_DMASYNC_POSTREAD);
1230
1231 for (;;) {
1232 desc = &sc->rxq.desc[sc->rxq.cur];
1233 data = &sc->rxq.data[sc->rxq.cur];
1234
1235 if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1236 (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1237 break;
1238
1239 data->drop = 0;
1240
1241 if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) ||
1242 (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) {
1243 /*
1244 * This should not happen since we did not request
1245 * to receive those frames when we filled RXCSR0.
1246 */
1247 DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n",
1248 le32toh(desc->flags));
1249 data->drop = 1;
1250 }
1251
1252 if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) {
1253 DPRINTFN(sc, 5, "%s\n", "bad length");
1254 data->drop = 1;
1255 }
1256
1257 /* mark the frame for decryption */
1258 desc->flags |= htole32(RT2560_RX_CIPHER_BUSY);
1259
1260 DPRINTFN(sc, 15, "rx done idx=%u\n", sc->rxq.cur);
1261
1262 sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT;
1263 }
1264
1265 bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1266 BUS_DMASYNC_PREWRITE);
1267
1268 /* kick decrypt */
1269 RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT);
1270 }
1271
1272 static void
rt2560_beacon_update(struct ieee80211vap * vap,int item)1273 rt2560_beacon_update(struct ieee80211vap *vap, int item)
1274 {
1275 struct ieee80211_beacon_offsets *bo = &vap->iv_bcn_off;
1276
1277 setbit(bo->bo_flags, item);
1278 }
1279
1280 /*
1281 * This function is called periodically in IBSS mode when a new beacon must be
1282 * sent out.
1283 */
1284 static void
rt2560_beacon_expire(struct rt2560_softc * sc)1285 rt2560_beacon_expire(struct rt2560_softc *sc)
1286 {
1287 struct ieee80211com *ic = &sc->sc_ic;
1288 struct rt2560_tx_data *data;
1289
1290 if (ic->ic_opmode != IEEE80211_M_IBSS &&
1291 ic->ic_opmode != IEEE80211_M_HOSTAP &&
1292 ic->ic_opmode != IEEE80211_M_MBSS)
1293 return;
1294
1295 data = &sc->bcnq.data[sc->bcnq.next];
1296 /*
1297 * Don't send beacon if bsschan isn't set
1298 */
1299 if (data->ni == NULL)
1300 return;
1301
1302 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE);
1303 bus_dmamap_unload(sc->bcnq.data_dmat, data->map);
1304
1305 /* XXX 1 =>'s mcast frames which means all PS sta's will wakeup! */
1306 ieee80211_beacon_update(data->ni, data->m, 1);
1307
1308 rt2560_tx_bcn(sc, data->m, data->ni);
1309
1310 DPRINTFN(sc, 15, "%s", "beacon expired\n");
1311
1312 sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT;
1313 }
1314
1315 /* ARGSUSED */
1316 static void
rt2560_wakeup_expire(struct rt2560_softc * sc)1317 rt2560_wakeup_expire(struct rt2560_softc *sc)
1318 {
1319 DPRINTFN(sc, 2, "%s", "wakeup expired\n");
1320 }
1321
1322 void
rt2560_intr(void * arg)1323 rt2560_intr(void *arg)
1324 {
1325 struct rt2560_softc *sc = arg;
1326 uint32_t r;
1327
1328 RAL_LOCK(sc);
1329
1330 /* disable interrupts */
1331 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
1332
1333 /* don't re-enable interrupts if we're shutting down */
1334 if (!(sc->sc_flags & RT2560_F_RUNNING)) {
1335 RAL_UNLOCK(sc);
1336 return;
1337 }
1338
1339 r = RAL_READ(sc, RT2560_CSR7);
1340 RAL_WRITE(sc, RT2560_CSR7, r);
1341
1342 if (r & RT2560_BEACON_EXPIRE)
1343 rt2560_beacon_expire(sc);
1344
1345 if (r & RT2560_WAKEUP_EXPIRE)
1346 rt2560_wakeup_expire(sc);
1347
1348 if (r & RT2560_ENCRYPTION_DONE)
1349 rt2560_encryption_intr(sc);
1350
1351 if (r & RT2560_TX_DONE)
1352 rt2560_tx_intr(sc);
1353
1354 if (r & RT2560_PRIO_DONE)
1355 rt2560_prio_intr(sc);
1356
1357 if (r & RT2560_DECRYPTION_DONE)
1358 rt2560_decryption_intr(sc);
1359
1360 if (r & RT2560_RX_DONE) {
1361 rt2560_rx_intr(sc);
1362 rt2560_encryption_intr(sc);
1363 }
1364
1365 /* re-enable interrupts */
1366 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
1367
1368 RAL_UNLOCK(sc);
1369 }
1370
1371 #define RAL_SIFS 10 /* us */
1372
1373 #define RT2560_TXRX_TURNAROUND 10 /* us */
1374
1375 static uint8_t
rt2560_plcp_signal(int rate)1376 rt2560_plcp_signal(int rate)
1377 {
1378 switch (rate) {
1379 /* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1380 case 12: return 0xb;
1381 case 18: return 0xf;
1382 case 24: return 0xa;
1383 case 36: return 0xe;
1384 case 48: return 0x9;
1385 case 72: return 0xd;
1386 case 96: return 0x8;
1387 case 108: return 0xc;
1388
1389 /* CCK rates (NB: not IEEE std, device-specific) */
1390 case 2: return 0x0;
1391 case 4: return 0x1;
1392 case 11: return 0x2;
1393 case 22: return 0x3;
1394 }
1395 return 0xff; /* XXX unsupported/unknown rate */
1396 }
1397
1398 static void
rt2560_setup_tx_desc(struct rt2560_softc * sc,struct rt2560_tx_desc * desc,uint32_t flags,int len,int rate,int encrypt,bus_addr_t physaddr)1399 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc,
1400 uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr)
1401 {
1402 struct ieee80211com *ic = &sc->sc_ic;
1403 uint16_t plcp_length;
1404 int remainder;
1405
1406 desc->flags = htole32(flags);
1407 desc->flags |= htole32(len << 16);
1408
1409 desc->physaddr = htole32(physaddr);
1410 desc->wme = htole16(
1411 RT2560_AIFSN(2) |
1412 RT2560_LOGCWMIN(3) |
1413 RT2560_LOGCWMAX(8));
1414
1415 /* setup PLCP fields */
1416 desc->plcp_signal = rt2560_plcp_signal(rate);
1417 desc->plcp_service = 4;
1418
1419 len += IEEE80211_CRC_LEN;
1420 if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) {
1421 desc->flags |= htole32(RT2560_TX_OFDM);
1422
1423 plcp_length = len & 0xfff;
1424 desc->plcp_length_hi = plcp_length >> 6;
1425 desc->plcp_length_lo = plcp_length & 0x3f;
1426 } else {
1427 plcp_length = howmany(16 * len, rate);
1428 if (rate == 22) {
1429 remainder = (16 * len) % 22;
1430 if (remainder != 0 && remainder < 7)
1431 desc->plcp_service |= RT2560_PLCP_LENGEXT;
1432 }
1433 desc->plcp_length_hi = plcp_length >> 8;
1434 desc->plcp_length_lo = plcp_length & 0xff;
1435
1436 if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
1437 desc->plcp_signal |= 0x08;
1438 }
1439
1440 if (!encrypt)
1441 desc->flags |= htole32(RT2560_TX_VALID);
1442 desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY)
1443 : htole32(RT2560_TX_BUSY);
1444 }
1445
1446 static int
rt2560_tx_bcn(struct rt2560_softc * sc,struct mbuf * m0,struct ieee80211_node * ni)1447 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0,
1448 struct ieee80211_node *ni)
1449 {
1450 struct ieee80211vap *vap = ni->ni_vap;
1451 struct rt2560_tx_desc *desc;
1452 struct rt2560_tx_data *data;
1453 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1454 int nsegs, rate, error;
1455
1456 desc = &sc->bcnq.desc[sc->bcnq.cur];
1457 data = &sc->bcnq.data[sc->bcnq.cur];
1458
1459 /* XXX maybe a separate beacon rate? */
1460 rate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].mgmtrate;
1461
1462 error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0,
1463 segs, &nsegs, BUS_DMA_NOWAIT);
1464 if (error != 0) {
1465 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1466 error);
1467 m_freem(m0);
1468 return error;
1469 }
1470
1471 if (ieee80211_radiotap_active_vap(vap)) {
1472 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1473
1474 tap->wt_flags = 0;
1475 tap->wt_rate = rate;
1476 tap->wt_antenna = sc->tx_ant;
1477
1478 ieee80211_radiotap_tx(vap, m0);
1479 }
1480
1481 data->m = m0;
1482 data->ni = ni;
1483
1484 rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF |
1485 RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr);
1486
1487 DPRINTFN(sc, 10, "sending beacon frame len=%u idx=%u rate=%u\n",
1488 m0->m_pkthdr.len, sc->bcnq.cur, rate);
1489
1490 bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1491 bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map,
1492 BUS_DMASYNC_PREWRITE);
1493
1494 sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT;
1495
1496 return 0;
1497 }
1498
1499 static int
rt2560_tx_mgt(struct rt2560_softc * sc,struct mbuf * m0,struct ieee80211_node * ni)1500 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0,
1501 struct ieee80211_node *ni)
1502 {
1503 struct ieee80211vap *vap = ni->ni_vap;
1504 struct ieee80211com *ic = ni->ni_ic;
1505 struct rt2560_tx_desc *desc;
1506 struct rt2560_tx_data *data;
1507 struct ieee80211_frame *wh;
1508 struct ieee80211_key *k;
1509 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1510 uint16_t dur;
1511 uint32_t flags = 0;
1512 int nsegs, rate, error;
1513
1514 desc = &sc->prioq.desc[sc->prioq.cur];
1515 data = &sc->prioq.data[sc->prioq.cur];
1516
1517 rate = ni->ni_txparms->mgmtrate;
1518
1519 wh = mtod(m0, struct ieee80211_frame *);
1520
1521 ieee80211_output_seqno_assign(ni, -1, m0);
1522
1523 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1524 k = ieee80211_crypto_encap(ni, m0);
1525 if (k == NULL) {
1526 m_freem(m0);
1527 return ENOBUFS;
1528 }
1529 }
1530
1531 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0,
1532 segs, &nsegs, 0);
1533 if (error != 0) {
1534 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1535 error);
1536 m_freem(m0);
1537 return error;
1538 }
1539
1540 if (ieee80211_radiotap_active_vap(vap)) {
1541 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1542
1543 tap->wt_flags = 0;
1544 tap->wt_rate = rate;
1545 tap->wt_antenna = sc->tx_ant;
1546
1547 ieee80211_radiotap_tx(vap, m0);
1548 }
1549
1550 data->m = m0;
1551 data->ni = ni;
1552 /* management frames are not taken into account for amrr */
1553 data->rix = IEEE80211_FIXED_RATE_NONE;
1554
1555 wh = mtod(m0, struct ieee80211_frame *);
1556
1557 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1558 flags |= RT2560_TX_ACK;
1559
1560 dur = ieee80211_ack_duration(ic->ic_rt,
1561 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1562 *(uint16_t *)wh->i_dur = htole16(dur);
1563
1564 /* tell hardware to add timestamp for probe responses */
1565 if (IEEE80211_IS_MGMT_PROBE_RESP(wh))
1566 flags |= RT2560_TX_TIMESTAMP;
1567 }
1568
1569 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0,
1570 segs->ds_addr);
1571
1572 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1573 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1574 BUS_DMASYNC_PREWRITE);
1575
1576 DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n",
1577 m0->m_pkthdr.len, sc->prioq.cur, rate);
1578
1579 /* kick prio */
1580 sc->prioq.queued++;
1581 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1582 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1583
1584 return 0;
1585 }
1586
1587 static int
rt2560_sendprot(struct rt2560_softc * sc,const struct mbuf * m,struct ieee80211_node * ni,int prot,int rate)1588 rt2560_sendprot(struct rt2560_softc *sc,
1589 const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate)
1590 {
1591 struct ieee80211com *ic = ni->ni_ic;
1592 struct rt2560_tx_desc *desc;
1593 struct rt2560_tx_data *data;
1594 struct mbuf *mprot;
1595 int protrate, flags, error;
1596 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1597 int nsegs;
1598
1599 mprot = ieee80211_alloc_prot(ni, m, rate, prot);
1600 if (mprot == NULL) {
1601 if_inc_counter(ni->ni_vap->iv_ifp, IFCOUNTER_OERRORS, 1);
1602 device_printf(sc->sc_dev,
1603 "could not allocate mbuf for protection mode %d\n", prot);
1604 return ENOBUFS;
1605 }
1606
1607 desc = &sc->txq.desc[sc->txq.cur_encrypt];
1608 data = &sc->txq.data[sc->txq.cur_encrypt];
1609
1610 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map,
1611 mprot, segs, &nsegs, 0);
1612 if (error != 0) {
1613 device_printf(sc->sc_dev,
1614 "could not map mbuf (error %d)\n", error);
1615 m_freem(mprot);
1616 return error;
1617 }
1618
1619 data->m = mprot;
1620 data->ni = ieee80211_ref_node(ni);
1621 /* ctl frames are not taken into account for amrr */
1622 data->rix = IEEE80211_FIXED_RATE_NONE;
1623
1624 protrate = ieee80211_ctl_rate(ic->ic_rt, rate);
1625 flags = RT2560_TX_MORE_FRAG;
1626 if (prot == IEEE80211_PROT_RTSCTS)
1627 flags |= RT2560_TX_ACK;
1628
1629 rt2560_setup_tx_desc(sc, desc, flags, mprot->m_pkthdr.len, protrate, 1,
1630 segs->ds_addr);
1631
1632 bus_dmamap_sync(sc->txq.data_dmat, data->map,
1633 BUS_DMASYNC_PREWRITE);
1634
1635 sc->txq.queued++;
1636 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1637
1638 return 0;
1639 }
1640
1641 static int
rt2560_tx_raw(struct rt2560_softc * sc,struct mbuf * m0,struct ieee80211_node * ni,const struct ieee80211_bpf_params * params)1642 rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0,
1643 struct ieee80211_node *ni, const struct ieee80211_bpf_params *params)
1644 {
1645 struct ieee80211vap *vap = ni->ni_vap;
1646 struct ieee80211com *ic = ni->ni_ic;
1647 struct rt2560_tx_desc *desc;
1648 struct rt2560_tx_data *data;
1649 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1650 uint32_t flags;
1651 int nsegs, rate, error;
1652
1653 desc = &sc->prioq.desc[sc->prioq.cur];
1654 data = &sc->prioq.data[sc->prioq.cur];
1655
1656 rate = params->ibp_rate0;
1657 if (!ieee80211_isratevalid(ic->ic_rt, rate)) {
1658 /* XXX fall back to mcast/mgmt rate? */
1659 m_freem(m0);
1660 return EINVAL;
1661 }
1662
1663 flags = 0;
1664 if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0)
1665 flags |= RT2560_TX_ACK;
1666 if (params->ibp_flags & (IEEE80211_BPF_RTS|IEEE80211_BPF_CTS)) {
1667 error = rt2560_sendprot(sc, m0, ni,
1668 params->ibp_flags & IEEE80211_BPF_RTS ?
1669 IEEE80211_PROT_RTSCTS : IEEE80211_PROT_CTSONLY,
1670 rate);
1671 if (error) {
1672 m_freem(m0);
1673 return error;
1674 }
1675 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1676 }
1677
1678 error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0,
1679 segs, &nsegs, 0);
1680 if (error != 0) {
1681 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1682 error);
1683 m_freem(m0);
1684 return error;
1685 }
1686
1687 if (ieee80211_radiotap_active_vap(vap)) {
1688 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1689
1690 tap->wt_flags = 0;
1691 tap->wt_rate = rate;
1692 tap->wt_antenna = sc->tx_ant;
1693
1694 ieee80211_radiotap_tx(ni->ni_vap, m0);
1695 }
1696
1697 data->m = m0;
1698 data->ni = ni;
1699
1700 /* XXX need to setup descriptor ourself */
1701 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len,
1702 rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0,
1703 segs->ds_addr);
1704
1705 bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1706 bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1707 BUS_DMASYNC_PREWRITE);
1708
1709 DPRINTFN(sc, 10, "sending raw frame len=%u idx=%u rate=%u\n",
1710 m0->m_pkthdr.len, sc->prioq.cur, rate);
1711
1712 /* kick prio */
1713 sc->prioq.queued++;
1714 sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1715 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1716
1717 return 0;
1718 }
1719
1720 static int
rt2560_tx_data(struct rt2560_softc * sc,struct mbuf * m0,struct ieee80211_node * ni)1721 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0,
1722 struct ieee80211_node *ni)
1723 {
1724 struct ieee80211vap *vap = ni->ni_vap;
1725 struct ieee80211com *ic = ni->ni_ic;
1726 struct rt2560_tx_desc *desc;
1727 struct rt2560_tx_data *data;
1728 struct ieee80211_frame *wh;
1729 const struct ieee80211_txparam *tp = ni->ni_txparms;
1730 struct ieee80211_key *k;
1731 struct mbuf *mnew;
1732 bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1733 uint16_t dur;
1734 uint32_t flags;
1735 int nsegs, rate, error;
1736
1737 wh = mtod(m0, struct ieee80211_frame *);
1738
1739 if (m0->m_flags & M_EAPOL) {
1740 rate = tp->mgmtrate;
1741 } else if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1742 rate = tp->mcastrate;
1743 } else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
1744 rate = tp->ucastrate;
1745 } else {
1746 (void) ieee80211_ratectl_rate(ni, NULL, 0);
1747 rate = ieee80211_node_get_txrate_dot11rate(ni);
1748 }
1749
1750 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1751 k = ieee80211_crypto_encap(ni, m0);
1752 if (k == NULL) {
1753 m_freem(m0);
1754 return ENOBUFS;
1755 }
1756
1757 /* packet header may have moved, reset our local pointer */
1758 wh = mtod(m0, struct ieee80211_frame *);
1759 }
1760
1761 flags = 0;
1762 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1763 int prot = IEEE80211_PROT_NONE;
1764 if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold)
1765 prot = IEEE80211_PROT_RTSCTS;
1766 else if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1767 ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM)
1768 prot = ic->ic_protmode;
1769 if (prot != IEEE80211_PROT_NONE) {
1770 error = rt2560_sendprot(sc, m0, ni, prot, rate);
1771 if (error) {
1772 m_freem(m0);
1773 return error;
1774 }
1775 flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1776 }
1777 }
1778
1779 data = &sc->txq.data[sc->txq.cur_encrypt];
1780 desc = &sc->txq.desc[sc->txq.cur_encrypt];
1781
1782 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0,
1783 segs, &nsegs, 0);
1784 if (error != 0 && error != EFBIG) {
1785 device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1786 error);
1787 m_freem(m0);
1788 return error;
1789 }
1790 if (error != 0) {
1791 mnew = m_defrag(m0, M_NOWAIT);
1792 if (mnew == NULL) {
1793 device_printf(sc->sc_dev,
1794 "could not defragment mbuf\n");
1795 m_freem(m0);
1796 return ENOBUFS;
1797 }
1798 m0 = mnew;
1799
1800 error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map,
1801 m0, segs, &nsegs, 0);
1802 if (error != 0) {
1803 device_printf(sc->sc_dev,
1804 "could not map mbuf (error %d)\n", error);
1805 m_freem(m0);
1806 return error;
1807 }
1808
1809 /* packet header may have moved, reset our local pointer */
1810 wh = mtod(m0, struct ieee80211_frame *);
1811 }
1812
1813 if (ieee80211_radiotap_active_vap(vap)) {
1814 struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1815
1816 tap->wt_flags = 0;
1817 tap->wt_rate = rate;
1818 tap->wt_antenna = sc->tx_ant;
1819
1820 ieee80211_radiotap_tx(vap, m0);
1821 }
1822
1823 data->m = m0;
1824 data->ni = ni;
1825
1826 /* remember link conditions for rate adaptation algorithm */
1827 if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) {
1828 data->rix = ieee80211_node_get_txrate_dot11rate(ni);
1829 /* XXX probably need last rssi value and not avg */
1830 data->rssi = ic->ic_node_getrssi(ni);
1831 } else
1832 data->rix = IEEE80211_FIXED_RATE_NONE;
1833
1834 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1835 flags |= RT2560_TX_ACK;
1836
1837 dur = ieee80211_ack_duration(ic->ic_rt,
1838 rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1839 *(uint16_t *)wh->i_dur = htole16(dur);
1840 }
1841
1842 rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1,
1843 segs->ds_addr);
1844
1845 bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1846 bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1847 BUS_DMASYNC_PREWRITE);
1848
1849 DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n",
1850 m0->m_pkthdr.len, sc->txq.cur_encrypt, rate);
1851
1852 /* kick encrypt */
1853 sc->txq.queued++;
1854 sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1855 RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT);
1856
1857 return 0;
1858 }
1859
1860 static int
rt2560_transmit(struct ieee80211com * ic,struct mbuf * m)1861 rt2560_transmit(struct ieee80211com *ic, struct mbuf *m)
1862 {
1863 struct rt2560_softc *sc = ic->ic_softc;
1864 int error;
1865
1866 RAL_LOCK(sc);
1867 if ((sc->sc_flags & RT2560_F_RUNNING) == 0) {
1868 RAL_UNLOCK(sc);
1869 return (ENXIO);
1870 }
1871 error = mbufq_enqueue(&sc->sc_snd, m);
1872 if (error) {
1873 RAL_UNLOCK(sc);
1874 return (error);
1875 }
1876 rt2560_start(sc);
1877 RAL_UNLOCK(sc);
1878
1879 return (0);
1880 }
1881
1882 static void
rt2560_start(struct rt2560_softc * sc)1883 rt2560_start(struct rt2560_softc *sc)
1884 {
1885 struct ieee80211_node *ni;
1886 struct mbuf *m;
1887
1888 RAL_LOCK_ASSERT(sc);
1889
1890 while (sc->txq.queued < RT2560_TX_RING_COUNT - 1 &&
1891 (m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
1892 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1893 if (rt2560_tx_data(sc, m, ni) != 0) {
1894 if_inc_counter(ni->ni_vap->iv_ifp,
1895 IFCOUNTER_OERRORS, 1);
1896 ieee80211_free_node(ni);
1897 break;
1898 }
1899 sc->sc_tx_timer = 5;
1900 }
1901 }
1902
1903 static void
rt2560_watchdog(void * arg)1904 rt2560_watchdog(void *arg)
1905 {
1906 struct rt2560_softc *sc = arg;
1907
1908 RAL_LOCK_ASSERT(sc);
1909
1910 KASSERT(sc->sc_flags & RT2560_F_RUNNING, ("not running"));
1911
1912 if (sc->sc_invalid) /* card ejected */
1913 return;
1914
1915 rt2560_encryption_intr(sc);
1916 rt2560_tx_intr(sc);
1917
1918 if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) {
1919 device_printf(sc->sc_dev, "device timeout\n");
1920 rt2560_init_locked(sc);
1921 counter_u64_add(sc->sc_ic.ic_oerrors, 1);
1922 /* NB: callout is reset in rt2560_init() */
1923 return;
1924 }
1925 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc);
1926 }
1927
1928 static void
rt2560_parent(struct ieee80211com * ic)1929 rt2560_parent(struct ieee80211com *ic)
1930 {
1931 struct rt2560_softc *sc = ic->ic_softc;
1932 int startall = 0;
1933
1934 RAL_LOCK(sc);
1935 if (ic->ic_nrunning > 0) {
1936 if ((sc->sc_flags & RT2560_F_RUNNING) == 0) {
1937 rt2560_init_locked(sc);
1938 startall = 1;
1939 } else
1940 rt2560_update_promisc(ic);
1941 } else if (sc->sc_flags & RT2560_F_RUNNING)
1942 rt2560_stop_locked(sc);
1943 RAL_UNLOCK(sc);
1944 if (startall)
1945 ieee80211_start_all(ic);
1946 }
1947
1948 static void
rt2560_bbp_write(struct rt2560_softc * sc,uint8_t reg,uint8_t val)1949 rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val)
1950 {
1951 uint32_t tmp;
1952 int ntries;
1953
1954 for (ntries = 0; ntries < 100; ntries++) {
1955 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
1956 break;
1957 DELAY(1);
1958 }
1959 if (ntries == 100) {
1960 device_printf(sc->sc_dev, "could not write to BBP\n");
1961 return;
1962 }
1963
1964 tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val;
1965 RAL_WRITE(sc, RT2560_BBPCSR, tmp);
1966
1967 DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val);
1968 }
1969
1970 static uint8_t
rt2560_bbp_read(struct rt2560_softc * sc,uint8_t reg)1971 rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg)
1972 {
1973 uint32_t val;
1974 int ntries;
1975
1976 for (ntries = 0; ntries < 100; ntries++) {
1977 if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
1978 break;
1979 DELAY(1);
1980 }
1981 if (ntries == 100) {
1982 device_printf(sc->sc_dev, "could not read from BBP\n");
1983 return 0;
1984 }
1985
1986 val = RT2560_BBP_BUSY | reg << 8;
1987 RAL_WRITE(sc, RT2560_BBPCSR, val);
1988
1989 for (ntries = 0; ntries < 100; ntries++) {
1990 val = RAL_READ(sc, RT2560_BBPCSR);
1991 if (!(val & RT2560_BBP_BUSY))
1992 return val & 0xff;
1993 DELAY(1);
1994 }
1995
1996 device_printf(sc->sc_dev, "could not read from BBP\n");
1997 return 0;
1998 }
1999
2000 static void
rt2560_rf_write(struct rt2560_softc * sc,uint8_t reg,uint32_t val)2001 rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val)
2002 {
2003 uint32_t tmp;
2004 int ntries;
2005
2006 for (ntries = 0; ntries < 100; ntries++) {
2007 if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY))
2008 break;
2009 DELAY(1);
2010 }
2011 if (ntries == 100) {
2012 device_printf(sc->sc_dev, "could not write to RF\n");
2013 return;
2014 }
2015
2016 tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 |
2017 (reg & 0x3);
2018 RAL_WRITE(sc, RT2560_RFCSR, tmp);
2019
2020 /* remember last written value in sc */
2021 sc->rf_regs[reg] = val;
2022
2023 DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff);
2024 }
2025
2026 static void
rt2560_set_chan(struct rt2560_softc * sc,struct ieee80211_channel * c)2027 rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c)
2028 {
2029 struct ieee80211com *ic = &sc->sc_ic;
2030 uint8_t power, tmp;
2031 u_int i, chan;
2032
2033 chan = ieee80211_chan2ieee(ic, c);
2034 KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan));
2035
2036 if (IEEE80211_IS_CHAN_2GHZ(c))
2037 power = min(sc->txpow[chan - 1], 31);
2038 else
2039 power = 31;
2040
2041 /* adjust txpower using ifconfig settings */
2042 power -= (100 - ic->ic_txpowlimit) / 8;
2043
2044 DPRINTFN(sc, 2, "setting channel to %u, txpower to %u\n", chan, power);
2045
2046 switch (sc->rf_rev) {
2047 case RT2560_RF_2522:
2048 rt2560_rf_write(sc, RAL_RF1, 0x00814);
2049 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]);
2050 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2051 break;
2052
2053 case RT2560_RF_2523:
2054 rt2560_rf_write(sc, RAL_RF1, 0x08804);
2055 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]);
2056 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044);
2057 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2058 break;
2059
2060 case RT2560_RF_2524:
2061 rt2560_rf_write(sc, RAL_RF1, 0x0c808);
2062 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]);
2063 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2064 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2065 break;
2066
2067 case RT2560_RF_2525:
2068 rt2560_rf_write(sc, RAL_RF1, 0x08808);
2069 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]);
2070 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2071 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2072
2073 rt2560_rf_write(sc, RAL_RF1, 0x08808);
2074 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]);
2075 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2076 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2077 break;
2078
2079 case RT2560_RF_2525E:
2080 rt2560_rf_write(sc, RAL_RF1, 0x08808);
2081 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]);
2082 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2083 rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282);
2084 break;
2085
2086 case RT2560_RF_2526:
2087 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]);
2088 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2089 rt2560_rf_write(sc, RAL_RF1, 0x08804);
2090
2091 rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]);
2092 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2093 rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2094 break;
2095
2096 /* dual-band RF */
2097 case RT2560_RF_5222:
2098 for (i = 0; rt2560_rf5222[i].chan != chan; i++);
2099
2100 rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1);
2101 rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2);
2102 rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2103 rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4);
2104 break;
2105 default:
2106 printf("unknown ral rev=%d\n", sc->rf_rev);
2107 }
2108
2109 /* XXX */
2110 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
2111 /* set Japan filter bit for channel 14 */
2112 tmp = rt2560_bbp_read(sc, 70);
2113
2114 tmp &= ~RT2560_JAPAN_FILTER;
2115 if (chan == 14)
2116 tmp |= RT2560_JAPAN_FILTER;
2117
2118 rt2560_bbp_write(sc, 70, tmp);
2119
2120 /* clear CRC errors */
2121 RAL_READ(sc, RT2560_CNT0);
2122 }
2123 }
2124
2125 static void
rt2560_getradiocaps(struct ieee80211com * ic,int maxchans,int * nchans,struct ieee80211_channel chans[])2126 rt2560_getradiocaps(struct ieee80211com *ic,
2127 int maxchans, int *nchans, struct ieee80211_channel chans[])
2128 {
2129 struct rt2560_softc *sc = ic->ic_softc;
2130 uint8_t bands[IEEE80211_MODE_BYTES];
2131
2132 memset(bands, 0, sizeof(bands));
2133 setbit(bands, IEEE80211_MODE_11B);
2134 setbit(bands, IEEE80211_MODE_11G);
2135 ieee80211_add_channels_default_2ghz(chans, maxchans, nchans, bands, 0);
2136
2137 if (sc->rf_rev == RT2560_RF_5222) {
2138 setbit(bands, IEEE80211_MODE_11A);
2139 ieee80211_add_channel_list_5ghz(chans, maxchans, nchans,
2140 rt2560_chan_5ghz, nitems(rt2560_chan_5ghz), bands, 0);
2141 }
2142 }
2143
2144 static void
rt2560_set_channel(struct ieee80211com * ic)2145 rt2560_set_channel(struct ieee80211com *ic)
2146 {
2147 struct rt2560_softc *sc = ic->ic_softc;
2148
2149 RAL_LOCK(sc);
2150 rt2560_set_chan(sc, ic->ic_curchan);
2151 RAL_UNLOCK(sc);
2152
2153 }
2154
2155 #if 0
2156 /*
2157 * Disable RF auto-tuning.
2158 */
2159 static void
2160 rt2560_disable_rf_tune(struct rt2560_softc *sc)
2161 {
2162 uint32_t tmp;
2163
2164 if (sc->rf_rev != RT2560_RF_2523) {
2165 tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE;
2166 rt2560_rf_write(sc, RAL_RF1, tmp);
2167 }
2168
2169 tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE;
2170 rt2560_rf_write(sc, RAL_RF3, tmp);
2171
2172 DPRINTFN(sc, 2, "%s", "disabling RF autotune\n");
2173 }
2174 #endif
2175
2176 /*
2177 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF
2178 * synchronization.
2179 */
2180 static void
rt2560_enable_tsf_sync(struct rt2560_softc * sc)2181 rt2560_enable_tsf_sync(struct rt2560_softc *sc)
2182 {
2183 struct ieee80211com *ic = &sc->sc_ic;
2184 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2185 uint16_t logcwmin, preload;
2186 uint32_t tmp;
2187
2188 /* first, disable TSF synchronization */
2189 RAL_WRITE(sc, RT2560_CSR14, 0);
2190
2191 tmp = 16 * vap->iv_bss->ni_intval;
2192 RAL_WRITE(sc, RT2560_CSR12, tmp);
2193
2194 RAL_WRITE(sc, RT2560_CSR13, 0);
2195
2196 logcwmin = 5;
2197 preload = (vap->iv_opmode == IEEE80211_M_STA) ? 384 : 1024;
2198 tmp = logcwmin << 16 | preload;
2199 RAL_WRITE(sc, RT2560_BCNOCSR, tmp);
2200
2201 /* finally, enable TSF synchronization */
2202 tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN;
2203 if (ic->ic_opmode == IEEE80211_M_STA)
2204 tmp |= RT2560_ENABLE_TSF_SYNC(1);
2205 else
2206 tmp |= RT2560_ENABLE_TSF_SYNC(2) |
2207 RT2560_ENABLE_BEACON_GENERATOR;
2208 RAL_WRITE(sc, RT2560_CSR14, tmp);
2209
2210 DPRINTF(sc, "%s", "enabling TSF synchronization\n");
2211 }
2212
2213 static void
rt2560_enable_tsf(struct rt2560_softc * sc)2214 rt2560_enable_tsf(struct rt2560_softc *sc)
2215 {
2216 RAL_WRITE(sc, RT2560_CSR14, 0);
2217 RAL_WRITE(sc, RT2560_CSR14,
2218 RT2560_ENABLE_TSF_SYNC(2) | RT2560_ENABLE_TSF);
2219 }
2220
2221 static void
rt2560_update_plcp(struct rt2560_softc * sc)2222 rt2560_update_plcp(struct rt2560_softc *sc)
2223 {
2224 struct ieee80211com *ic = &sc->sc_ic;
2225
2226 /* no short preamble for 1Mbps */
2227 RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400);
2228
2229 if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) {
2230 /* values taken from the reference driver */
2231 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380401);
2232 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402);
2233 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b8403);
2234 } else {
2235 /* same values as above or'ed 0x8 */
2236 RAL_WRITE(sc, RT2560_PLCP2MCSR, 0x00380409);
2237 RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a);
2238 RAL_WRITE(sc, RT2560_PLCP11MCSR, 0x000b840b);
2239 }
2240
2241 DPRINTF(sc, "updating PLCP for %s preamble\n",
2242 (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long");
2243 }
2244
2245 /*
2246 * This function can be called by ieee80211_set_shortslottime(). Refer to
2247 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed.
2248 */
2249 static void
rt2560_update_slot(struct ieee80211com * ic)2250 rt2560_update_slot(struct ieee80211com *ic)
2251 {
2252 struct rt2560_softc *sc = ic->ic_softc;
2253 uint8_t slottime;
2254 uint16_t tx_sifs, tx_pifs, tx_difs, eifs;
2255 uint32_t tmp;
2256
2257 #ifndef FORCE_SLOTTIME
2258 slottime = IEEE80211_GET_SLOTTIME(ic);
2259 #else
2260 /*
2261 * Setting slot time according to "short slot time" capability
2262 * in beacon/probe_resp seems to cause problem to acknowledge
2263 * certain AP's data frames transimitted at CCK/DS rates: the
2264 * problematic AP keeps retransmitting data frames, probably
2265 * because MAC level acks are not received by hardware.
2266 * So we cheat a little bit here by claiming we are capable of
2267 * "short slot time" but setting hardware slot time to the normal
2268 * slot time. ral(4) does not seem to have trouble to receive
2269 * frames transmitted using short slot time even if hardware
2270 * slot time is set to normal slot time. If we didn't use this
2271 * trick, we would have to claim that short slot time is not
2272 * supported; this would give relative poor RX performance
2273 * (-1Mb~-2Mb lower) and the _whole_ BSS would stop using short
2274 * slot time.
2275 */
2276 slottime = IEEE80211_DUR_SLOT;
2277 #endif
2278
2279 /* update the MAC slot boundaries */
2280 tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND;
2281 tx_pifs = tx_sifs + slottime;
2282 tx_difs = IEEE80211_DUR_DIFS(tx_sifs, slottime);
2283 eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60;
2284
2285 tmp = RAL_READ(sc, RT2560_CSR11);
2286 tmp = (tmp & ~0x1f00) | slottime << 8;
2287 RAL_WRITE(sc, RT2560_CSR11, tmp);
2288
2289 tmp = tx_pifs << 16 | tx_sifs;
2290 RAL_WRITE(sc, RT2560_CSR18, tmp);
2291
2292 tmp = eifs << 16 | tx_difs;
2293 RAL_WRITE(sc, RT2560_CSR19, tmp);
2294
2295 DPRINTF(sc, "setting slottime to %uus\n", slottime);
2296 }
2297
2298 static void
rt2560_set_basicrates(struct rt2560_softc * sc,const struct ieee80211_rateset * rs)2299 rt2560_set_basicrates(struct rt2560_softc *sc,
2300 const struct ieee80211_rateset *rs)
2301 {
2302 struct ieee80211com *ic = &sc->sc_ic;
2303 uint32_t mask = 0;
2304 uint8_t rate;
2305 int i;
2306
2307 for (i = 0; i < rs->rs_nrates; i++) {
2308 rate = rs->rs_rates[i];
2309
2310 if (!(rate & IEEE80211_RATE_BASIC))
2311 continue;
2312
2313 mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt,
2314 IEEE80211_RV(rate));
2315 }
2316
2317 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, mask);
2318
2319 DPRINTF(sc, "Setting basic rate mask to 0x%x\n", mask);
2320 }
2321
2322 static void
rt2560_update_led(struct rt2560_softc * sc,int led1,int led2)2323 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2)
2324 {
2325 uint32_t tmp;
2326
2327 /* set ON period to 70ms and OFF period to 30ms */
2328 tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30;
2329 RAL_WRITE(sc, RT2560_LEDCSR, tmp);
2330 }
2331
2332 static void
rt2560_set_bssid(struct rt2560_softc * sc,const uint8_t * bssid)2333 rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid)
2334 {
2335 uint32_t tmp;
2336
2337 tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24;
2338 RAL_WRITE(sc, RT2560_CSR5, tmp);
2339
2340 tmp = bssid[4] | bssid[5] << 8;
2341 RAL_WRITE(sc, RT2560_CSR6, tmp);
2342
2343 DPRINTF(sc, "setting BSSID to %6D\n", bssid, ":");
2344 }
2345
2346 static void
rt2560_set_macaddr(struct rt2560_softc * sc,const uint8_t * addr)2347 rt2560_set_macaddr(struct rt2560_softc *sc, const uint8_t *addr)
2348 {
2349 uint32_t tmp;
2350
2351 tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24;
2352 RAL_WRITE(sc, RT2560_CSR3, tmp);
2353
2354 tmp = addr[4] | addr[5] << 8;
2355 RAL_WRITE(sc, RT2560_CSR4, tmp);
2356
2357 DPRINTF(sc, "setting MAC address to %6D\n", addr, ":");
2358 }
2359
2360 static void
rt2560_get_macaddr(struct rt2560_softc * sc,uint8_t * addr)2361 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2362 {
2363 uint32_t tmp;
2364
2365 tmp = RAL_READ(sc, RT2560_CSR3);
2366 addr[0] = tmp & 0xff;
2367 addr[1] = (tmp >> 8) & 0xff;
2368 addr[2] = (tmp >> 16) & 0xff;
2369 addr[3] = (tmp >> 24);
2370
2371 tmp = RAL_READ(sc, RT2560_CSR4);
2372 addr[4] = tmp & 0xff;
2373 addr[5] = (tmp >> 8) & 0xff;
2374 }
2375
2376 static void
rt2560_update_promisc(struct ieee80211com * ic)2377 rt2560_update_promisc(struct ieee80211com *ic)
2378 {
2379 struct rt2560_softc *sc = ic->ic_softc;
2380 uint32_t tmp;
2381
2382 tmp = RAL_READ(sc, RT2560_RXCSR0);
2383
2384 tmp &= ~RT2560_DROP_NOT_TO_ME;
2385 if (ic->ic_promisc == 0)
2386 tmp |= RT2560_DROP_NOT_TO_ME;
2387
2388 RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2389
2390 DPRINTF(sc, "%s promiscuous mode\n",
2391 (ic->ic_promisc > 0) ? "entering" : "leaving");
2392 }
2393
2394 static const char *
rt2560_get_rf(int rev)2395 rt2560_get_rf(int rev)
2396 {
2397 switch (rev) {
2398 case RT2560_RF_2522: return "RT2522";
2399 case RT2560_RF_2523: return "RT2523";
2400 case RT2560_RF_2524: return "RT2524";
2401 case RT2560_RF_2525: return "RT2525";
2402 case RT2560_RF_2525E: return "RT2525e";
2403 case RT2560_RF_2526: return "RT2526";
2404 case RT2560_RF_5222: return "RT5222";
2405 default: return "unknown";
2406 }
2407 }
2408
2409 static void
rt2560_read_config(struct rt2560_softc * sc)2410 rt2560_read_config(struct rt2560_softc *sc)
2411 {
2412 uint16_t val;
2413 int i;
2414
2415 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0);
2416 sc->rf_rev = (val >> 11) & 0x7;
2417 sc->hw_radio = (val >> 10) & 0x1;
2418 sc->led_mode = (val >> 6) & 0x7;
2419 sc->rx_ant = (val >> 4) & 0x3;
2420 sc->tx_ant = (val >> 2) & 0x3;
2421 sc->nb_ant = val & 0x3;
2422
2423 /* read default values for BBP registers */
2424 for (i = 0; i < 16; i++) {
2425 val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i);
2426 if (val == 0 || val == 0xffff)
2427 continue;
2428
2429 sc->bbp_prom[i].reg = val >> 8;
2430 sc->bbp_prom[i].val = val & 0xff;
2431 }
2432
2433 /* read Tx power for all b/g channels */
2434 for (i = 0; i < 14 / 2; i++) {
2435 val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i);
2436 sc->txpow[i * 2] = val & 0xff;
2437 sc->txpow[i * 2 + 1] = val >> 8;
2438 }
2439 for (i = 0; i < 14; ++i) {
2440 if (sc->txpow[i] > 31)
2441 sc->txpow[i] = 24;
2442 }
2443
2444 val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE);
2445 if ((val & 0xff) == 0xff)
2446 sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR;
2447 else
2448 sc->rssi_corr = val & 0xff;
2449 DPRINTF(sc, "rssi correction %d, calibrate 0x%02x\n",
2450 sc->rssi_corr, val);
2451 }
2452
2453 static void
rt2560_scan_start(struct ieee80211com * ic)2454 rt2560_scan_start(struct ieee80211com *ic)
2455 {
2456 struct rt2560_softc *sc = ic->ic_softc;
2457
2458 /* abort TSF synchronization */
2459 RAL_WRITE(sc, RT2560_CSR14, 0);
2460 rt2560_set_bssid(sc, ieee80211broadcastaddr);
2461 }
2462
2463 static void
rt2560_scan_end(struct ieee80211com * ic)2464 rt2560_scan_end(struct ieee80211com *ic)
2465 {
2466 struct rt2560_softc *sc = ic->ic_softc;
2467 struct ieee80211vap *vap = ic->ic_scan->ss_vap;
2468
2469 rt2560_enable_tsf_sync(sc);
2470 /* XXX keep local copy */
2471 rt2560_set_bssid(sc, vap->iv_bss->ni_bssid);
2472 }
2473
2474 static int
rt2560_bbp_init(struct rt2560_softc * sc)2475 rt2560_bbp_init(struct rt2560_softc *sc)
2476 {
2477 int i, ntries;
2478
2479 /* wait for BBP to be ready */
2480 for (ntries = 0; ntries < 100; ntries++) {
2481 if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0)
2482 break;
2483 DELAY(1);
2484 }
2485 if (ntries == 100) {
2486 device_printf(sc->sc_dev, "timeout waiting for BBP\n");
2487 return EIO;
2488 }
2489
2490 /* initialize BBP registers to default values */
2491 for (i = 0; i < nitems(rt2560_def_bbp); i++) {
2492 rt2560_bbp_write(sc, rt2560_def_bbp[i].reg,
2493 rt2560_def_bbp[i].val);
2494 }
2495
2496 /* initialize BBP registers to values stored in EEPROM */
2497 for (i = 0; i < 16; i++) {
2498 if (sc->bbp_prom[i].reg == 0 && sc->bbp_prom[i].val == 0)
2499 break;
2500 rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val);
2501 }
2502 rt2560_bbp_write(sc, 17, 0x48); /* XXX restore bbp17 */
2503
2504 return 0;
2505 }
2506
2507 static void
rt2560_set_txantenna(struct rt2560_softc * sc,int antenna)2508 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna)
2509 {
2510 uint32_t tmp;
2511 uint8_t tx;
2512
2513 tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK;
2514 if (antenna == 1)
2515 tx |= RT2560_BBP_ANTA;
2516 else if (antenna == 2)
2517 tx |= RT2560_BBP_ANTB;
2518 else
2519 tx |= RT2560_BBP_DIVERSITY;
2520
2521 /* need to force I/Q flip for RF 2525e, 2526 and 5222 */
2522 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 ||
2523 sc->rf_rev == RT2560_RF_5222)
2524 tx |= RT2560_BBP_FLIPIQ;
2525
2526 rt2560_bbp_write(sc, RT2560_BBP_TX, tx);
2527
2528 /* update values for CCK and OFDM in BBPCSR1 */
2529 tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007;
2530 tmp |= (tx & 0x7) << 16 | (tx & 0x7);
2531 RAL_WRITE(sc, RT2560_BBPCSR1, tmp);
2532 }
2533
2534 static void
rt2560_set_rxantenna(struct rt2560_softc * sc,int antenna)2535 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna)
2536 {
2537 uint8_t rx;
2538
2539 rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK;
2540 if (antenna == 1)
2541 rx |= RT2560_BBP_ANTA;
2542 else if (antenna == 2)
2543 rx |= RT2560_BBP_ANTB;
2544 else
2545 rx |= RT2560_BBP_DIVERSITY;
2546
2547 /* need to force no I/Q flip for RF 2525e and 2526 */
2548 if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526)
2549 rx &= ~RT2560_BBP_FLIPIQ;
2550
2551 rt2560_bbp_write(sc, RT2560_BBP_RX, rx);
2552 }
2553
2554 static void
rt2560_init_locked(struct rt2560_softc * sc)2555 rt2560_init_locked(struct rt2560_softc *sc)
2556 {
2557 struct ieee80211com *ic = &sc->sc_ic;
2558 struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2559 uint32_t tmp;
2560 int i;
2561
2562 RAL_LOCK_ASSERT(sc);
2563
2564 rt2560_stop_locked(sc);
2565
2566 /* setup tx rings */
2567 tmp = RT2560_PRIO_RING_COUNT << 24 |
2568 RT2560_ATIM_RING_COUNT << 16 |
2569 RT2560_TX_RING_COUNT << 8 |
2570 RT2560_TX_DESC_SIZE;
2571
2572 /* rings must be initialized in this exact order */
2573 RAL_WRITE(sc, RT2560_TXCSR2, tmp);
2574 RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr);
2575 RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr);
2576 RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr);
2577 RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr);
2578
2579 /* setup rx ring */
2580 tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE;
2581
2582 RAL_WRITE(sc, RT2560_RXCSR1, tmp);
2583 RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr);
2584
2585 /* initialize MAC registers to default values */
2586 for (i = 0; i < nitems(rt2560_def_mac); i++)
2587 RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val);
2588
2589 rt2560_set_macaddr(sc, vap ? vap->iv_myaddr : ic->ic_macaddr);
2590
2591 /* set basic rate set (will be updated later) */
2592 RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153);
2593
2594 rt2560_update_slot(ic);
2595 rt2560_update_plcp(sc);
2596 rt2560_update_led(sc, 0, 0);
2597
2598 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2599 RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY);
2600
2601 if (rt2560_bbp_init(sc) != 0) {
2602 rt2560_stop_locked(sc);
2603 return;
2604 }
2605
2606 rt2560_set_txantenna(sc, sc->tx_ant);
2607 rt2560_set_rxantenna(sc, sc->rx_ant);
2608
2609 /* set default BSS channel */
2610 rt2560_set_chan(sc, ic->ic_curchan);
2611
2612 /* kick Rx */
2613 tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR;
2614 if (ic->ic_opmode != IEEE80211_M_MONITOR) {
2615 tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR;
2616 if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
2617 ic->ic_opmode != IEEE80211_M_MBSS)
2618 tmp |= RT2560_DROP_TODS;
2619 if (ic->ic_promisc == 0)
2620 tmp |= RT2560_DROP_NOT_TO_ME;
2621 }
2622 RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2623
2624 /* clear old FCS and Rx FIFO errors */
2625 RAL_READ(sc, RT2560_CNT0);
2626 RAL_READ(sc, RT2560_CNT4);
2627
2628 /* clear any pending interrupts */
2629 RAL_WRITE(sc, RT2560_CSR7, 0xffffffff);
2630
2631 /* enable interrupts */
2632 RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
2633
2634 sc->sc_flags |= RT2560_F_RUNNING;
2635
2636 callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc);
2637 }
2638
2639 static void
rt2560_init(void * priv)2640 rt2560_init(void *priv)
2641 {
2642 struct rt2560_softc *sc = priv;
2643 struct ieee80211com *ic = &sc->sc_ic;
2644
2645 RAL_LOCK(sc);
2646 rt2560_init_locked(sc);
2647 RAL_UNLOCK(sc);
2648
2649 if (sc->sc_flags & RT2560_F_RUNNING)
2650 ieee80211_start_all(ic); /* start all vap's */
2651 }
2652
2653 static void
rt2560_stop_locked(struct rt2560_softc * sc)2654 rt2560_stop_locked(struct rt2560_softc *sc)
2655 {
2656 volatile int *flags = &sc->sc_flags;
2657
2658 RAL_LOCK_ASSERT(sc);
2659
2660 while (*flags & RT2560_F_INPUT_RUNNING)
2661 msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10);
2662
2663 callout_stop(&sc->watchdog_ch);
2664 sc->sc_tx_timer = 0;
2665
2666 if (sc->sc_flags & RT2560_F_RUNNING) {
2667 sc->sc_flags &= ~RT2560_F_RUNNING;
2668
2669 /* abort Tx */
2670 RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX);
2671
2672 /* disable Rx */
2673 RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX);
2674
2675 /* reset ASIC (imply reset BBP) */
2676 RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2677 RAL_WRITE(sc, RT2560_CSR1, 0);
2678
2679 /* disable interrupts */
2680 RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
2681
2682 /* reset Tx and Rx rings */
2683 rt2560_reset_tx_ring(sc, &sc->txq);
2684 rt2560_reset_tx_ring(sc, &sc->atimq);
2685 rt2560_reset_tx_ring(sc, &sc->prioq);
2686 rt2560_reset_tx_ring(sc, &sc->bcnq);
2687 rt2560_reset_rx_ring(sc, &sc->rxq);
2688 }
2689 }
2690
2691 void
rt2560_stop(void * arg)2692 rt2560_stop(void *arg)
2693 {
2694 struct rt2560_softc *sc = arg;
2695
2696 RAL_LOCK(sc);
2697 rt2560_stop_locked(sc);
2698 RAL_UNLOCK(sc);
2699 }
2700
2701 static int
rt2560_raw_xmit(struct ieee80211_node * ni,struct mbuf * m,const struct ieee80211_bpf_params * params)2702 rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2703 const struct ieee80211_bpf_params *params)
2704 {
2705 struct ieee80211com *ic = ni->ni_ic;
2706 struct rt2560_softc *sc = ic->ic_softc;
2707
2708 RAL_LOCK(sc);
2709
2710 /* prevent management frames from being sent if we're not ready */
2711 if (!(sc->sc_flags & RT2560_F_RUNNING)) {
2712 RAL_UNLOCK(sc);
2713 m_freem(m);
2714 return ENETDOWN;
2715 }
2716 if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) {
2717 RAL_UNLOCK(sc);
2718 m_freem(m);
2719 return ENOBUFS; /* XXX */
2720 }
2721
2722 if (params == NULL) {
2723 /*
2724 * Legacy path; interpret frame contents to decide
2725 * precisely how to send the frame.
2726 */
2727 if (rt2560_tx_mgt(sc, m, ni) != 0)
2728 goto bad;
2729 } else {
2730 /*
2731 * Caller supplied explicit parameters to use in
2732 * sending the frame.
2733 */
2734 if (rt2560_tx_raw(sc, m, ni, params))
2735 goto bad;
2736 }
2737 sc->sc_tx_timer = 5;
2738
2739 RAL_UNLOCK(sc);
2740
2741 return 0;
2742 bad:
2743 RAL_UNLOCK(sc);
2744 return EIO; /* XXX */
2745 }
2746