xref: /freebsd/sys/dev/ral/rt2560.c (revision 9fd69f37d28cfd7438cac3eeb45fe9dd46b4d7dd)
1 /*	$FreeBSD$	*/
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 
20 #include <sys/cdefs.h>
21 __FBSDID("$FreeBSD$");
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 
42 #include <machine/bus.h>
43 #include <machine/resource.h>
44 #include <sys/rman.h>
45 
46 #include <net/bpf.h>
47 #include <net/if.h>
48 #include <net/if_arp.h>
49 #include <net/ethernet.h>
50 #include <net/if_dl.h>
51 #include <net/if_media.h>
52 #include <net/if_types.h>
53 
54 #include <net80211/ieee80211_var.h>
55 #include <net80211/ieee80211_radiotap.h>
56 #include <net80211/ieee80211_regdomain.h>
57 #include <net80211/ieee80211_amrr.h>
58 
59 #include <netinet/in.h>
60 #include <netinet/in_systm.h>
61 #include <netinet/in_var.h>
62 #include <netinet/ip.h>
63 #include <netinet/if_ether.h>
64 
65 #include <dev/ral/rt2560reg.h>
66 #include <dev/ral/rt2560var.h>
67 
68 #define RT2560_RSSI(sc, rssi)					\
69 	((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ?	\
70 	 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0)
71 
72 #define RAL_DEBUG
73 #ifdef RAL_DEBUG
74 #define DPRINTF(sc, fmt, ...) do {				\
75 	if (sc->sc_debug > 0)					\
76 		printf(fmt, __VA_ARGS__);			\
77 } while (0)
78 #define DPRINTFN(sc, n, fmt, ...) do {				\
79 	if (sc->sc_debug >= (n))				\
80 		printf(fmt, __VA_ARGS__);			\
81 } while (0)
82 #else
83 #define DPRINTF(sc, fmt, ...)
84 #define DPRINTFN(sc, n, fmt, ...)
85 #endif
86 
87 static struct ieee80211vap *rt2560_vap_create(struct ieee80211com *,
88 			    const char name[IFNAMSIZ], int unit, int opmode,
89 			    int flags, const uint8_t bssid[IEEE80211_ADDR_LEN],
90 			    const uint8_t mac[IEEE80211_ADDR_LEN]);
91 static void		rt2560_vap_delete(struct ieee80211vap *);
92 static void		rt2560_dma_map_addr(void *, bus_dma_segment_t *, int,
93 			    int);
94 static int		rt2560_alloc_tx_ring(struct rt2560_softc *,
95 			    struct rt2560_tx_ring *, int);
96 static void		rt2560_reset_tx_ring(struct rt2560_softc *,
97 			    struct rt2560_tx_ring *);
98 static void		rt2560_free_tx_ring(struct rt2560_softc *,
99 			    struct rt2560_tx_ring *);
100 static int		rt2560_alloc_rx_ring(struct rt2560_softc *,
101 			    struct rt2560_rx_ring *, int);
102 static void		rt2560_reset_rx_ring(struct rt2560_softc *,
103 			    struct rt2560_rx_ring *);
104 static void		rt2560_free_rx_ring(struct rt2560_softc *,
105 			    struct rt2560_rx_ring *);
106 static struct ieee80211_node *rt2560_node_alloc(struct ieee80211vap *,
107 			    const uint8_t [IEEE80211_ADDR_LEN]);
108 static void		rt2560_newassoc(struct ieee80211_node *, int);
109 static int		rt2560_newstate(struct ieee80211vap *,
110 			    enum ieee80211_state, int);
111 static uint16_t		rt2560_eeprom_read(struct rt2560_softc *, uint8_t);
112 static void		rt2560_encryption_intr(struct rt2560_softc *);
113 static void		rt2560_tx_intr(struct rt2560_softc *);
114 static void		rt2560_prio_intr(struct rt2560_softc *);
115 static void		rt2560_decryption_intr(struct rt2560_softc *);
116 static void		rt2560_rx_intr(struct rt2560_softc *);
117 static void		rt2560_beacon_update(struct ieee80211vap *, int item);
118 static void		rt2560_beacon_expire(struct rt2560_softc *);
119 static void		rt2560_wakeup_expire(struct rt2560_softc *);
120 static void		rt2560_scan_start(struct ieee80211com *);
121 static void		rt2560_scan_end(struct ieee80211com *);
122 static void		rt2560_set_channel(struct ieee80211com *);
123 static void		rt2560_setup_tx_desc(struct rt2560_softc *,
124 			    struct rt2560_tx_desc *, uint32_t, int, int, int,
125 			    bus_addr_t);
126 static int		rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *,
127 			    struct ieee80211_node *);
128 static int		rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *,
129 			    struct ieee80211_node *);
130 static int		rt2560_tx_data(struct rt2560_softc *, struct mbuf *,
131 			    struct ieee80211_node *);
132 static void		rt2560_start_locked(struct ifnet *);
133 static void		rt2560_start(struct ifnet *);
134 static void		rt2560_watchdog(void *);
135 static int		rt2560_ioctl(struct ifnet *, u_long, caddr_t);
136 static void		rt2560_bbp_write(struct rt2560_softc *, uint8_t,
137 			    uint8_t);
138 static uint8_t		rt2560_bbp_read(struct rt2560_softc *, uint8_t);
139 static void		rt2560_rf_write(struct rt2560_softc *, uint8_t,
140 			    uint32_t);
141 static void		rt2560_set_chan(struct rt2560_softc *,
142 			    struct ieee80211_channel *);
143 #if 0
144 static void		rt2560_disable_rf_tune(struct rt2560_softc *);
145 #endif
146 static void		rt2560_enable_tsf_sync(struct rt2560_softc *);
147 static void		rt2560_enable_tsf(struct rt2560_softc *);
148 static void		rt2560_update_plcp(struct rt2560_softc *);
149 static void		rt2560_update_slot(struct ifnet *);
150 static void		rt2560_set_basicrates(struct rt2560_softc *);
151 static void		rt2560_update_led(struct rt2560_softc *, int, int);
152 static void		rt2560_set_bssid(struct rt2560_softc *, const uint8_t *);
153 static void		rt2560_set_macaddr(struct rt2560_softc *, uint8_t *);
154 static void		rt2560_get_macaddr(struct rt2560_softc *, uint8_t *);
155 static void		rt2560_update_promisc(struct ifnet *);
156 static const char	*rt2560_get_rf(int);
157 static void		rt2560_read_config(struct rt2560_softc *);
158 static int		rt2560_bbp_init(struct rt2560_softc *);
159 static void		rt2560_set_txantenna(struct rt2560_softc *, int);
160 static void		rt2560_set_rxantenna(struct rt2560_softc *, int);
161 static void		rt2560_init_locked(struct rt2560_softc *);
162 static void		rt2560_init(void *);
163 static void		rt2560_stop_locked(struct rt2560_softc *);
164 static int		rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *,
165 				const struct ieee80211_bpf_params *);
166 
167 static const struct {
168 	uint32_t	reg;
169 	uint32_t	val;
170 } rt2560_def_mac[] = {
171 	RT2560_DEF_MAC
172 };
173 
174 static const struct {
175 	uint8_t	reg;
176 	uint8_t	val;
177 } rt2560_def_bbp[] = {
178 	RT2560_DEF_BBP
179 };
180 
181 static const uint32_t rt2560_rf2522_r2[]    = RT2560_RF2522_R2;
182 static const uint32_t rt2560_rf2523_r2[]    = RT2560_RF2523_R2;
183 static const uint32_t rt2560_rf2524_r2[]    = RT2560_RF2524_R2;
184 static const uint32_t rt2560_rf2525_r2[]    = RT2560_RF2525_R2;
185 static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2;
186 static const uint32_t rt2560_rf2525e_r2[]   = RT2560_RF2525E_R2;
187 static const uint32_t rt2560_rf2526_r2[]    = RT2560_RF2526_R2;
188 static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2;
189 
190 static const struct {
191 	uint8_t		chan;
192 	uint32_t	r1, r2, r4;
193 } rt2560_rf5222[] = {
194 	RT2560_RF5222
195 };
196 
197 int
198 rt2560_attach(device_t dev, int id)
199 {
200 	struct rt2560_softc *sc = device_get_softc(dev);
201 	struct ieee80211com *ic;
202 	struct ifnet *ifp;
203 	int error;
204 	uint8_t bands;
205 	uint8_t macaddr[IEEE80211_ADDR_LEN];
206 
207 	sc->sc_dev = dev;
208 
209 	mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
210 	    MTX_DEF | MTX_RECURSE);
211 
212 	callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0);
213 
214 	/* retrieve RT2560 rev. no */
215 	sc->asic_rev = RAL_READ(sc, RT2560_CSR0);
216 
217 	/* retrieve RF rev. no and various other things from EEPROM */
218 	rt2560_read_config(sc);
219 
220 	device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n",
221 	    sc->asic_rev, rt2560_get_rf(sc->rf_rev));
222 
223 	/*
224 	 * Allocate Tx and Rx rings.
225 	 */
226 	error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT);
227 	if (error != 0) {
228 		device_printf(sc->sc_dev, "could not allocate Tx ring\n");
229 		goto fail1;
230 	}
231 
232 	error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT);
233 	if (error != 0) {
234 		device_printf(sc->sc_dev, "could not allocate ATIM ring\n");
235 		goto fail2;
236 	}
237 
238 	error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT);
239 	if (error != 0) {
240 		device_printf(sc->sc_dev, "could not allocate Prio ring\n");
241 		goto fail3;
242 	}
243 
244 	error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT);
245 	if (error != 0) {
246 		device_printf(sc->sc_dev, "could not allocate Beacon ring\n");
247 		goto fail4;
248 	}
249 
250 	error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT);
251 	if (error != 0) {
252 		device_printf(sc->sc_dev, "could not allocate Rx ring\n");
253 		goto fail5;
254 	}
255 
256 	ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
257 	if (ifp == NULL) {
258 		device_printf(sc->sc_dev, "can not if_alloc()\n");
259 		goto fail6;
260 	}
261 	ic = ifp->if_l2com;
262 
263 	/* retrieve MAC address */
264 	rt2560_get_macaddr(sc, macaddr);
265 
266 	ifp->if_softc = sc;
267 	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
268 	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
269 	ifp->if_init = rt2560_init;
270 	ifp->if_ioctl = rt2560_ioctl;
271 	ifp->if_start = rt2560_start;
272 	IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
273 	ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
274 	IFQ_SET_READY(&ifp->if_snd);
275 
276 	ic->ic_ifp = ifp;
277 	ic->ic_opmode = IEEE80211_M_STA;
278 	ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
279 
280 	/* set device capabilities */
281 	ic->ic_caps =
282 		  IEEE80211_C_STA		/* station mode */
283 		| IEEE80211_C_IBSS		/* ibss, nee adhoc, mode */
284 		| IEEE80211_C_HOSTAP		/* hostap mode */
285 		| IEEE80211_C_MONITOR		/* monitor mode */
286 		| IEEE80211_C_AHDEMO		/* adhoc demo mode */
287 		| IEEE80211_C_WDS		/* 4-address traffic works */
288 		| IEEE80211_C_MBSS		/* mesh point link mode */
289 		| IEEE80211_C_SHPREAMBLE	/* short preamble supported */
290 		| IEEE80211_C_SHSLOT		/* short slot time supported */
291 		| IEEE80211_C_WPA		/* capable of WPA1+WPA2 */
292 		| IEEE80211_C_BGSCAN		/* capable of bg scanning */
293 #ifdef notyet
294 		| IEEE80211_C_TXFRAG		/* handle tx frags */
295 #endif
296 		;
297 
298 	bands = 0;
299 	setbit(&bands, IEEE80211_MODE_11B);
300 	setbit(&bands, IEEE80211_MODE_11G);
301 	if (sc->rf_rev == RT2560_RF_5222)
302 		setbit(&bands, IEEE80211_MODE_11A);
303 	ieee80211_init_channels(ic, NULL, &bands);
304 
305 	ieee80211_ifattach(ic, macaddr);
306 	ic->ic_newassoc = rt2560_newassoc;
307 	ic->ic_raw_xmit = rt2560_raw_xmit;
308 	ic->ic_updateslot = rt2560_update_slot;
309 	ic->ic_update_promisc = rt2560_update_promisc;
310 	ic->ic_node_alloc = rt2560_node_alloc;
311 	ic->ic_scan_start = rt2560_scan_start;
312 	ic->ic_scan_end = rt2560_scan_end;
313 	ic->ic_set_channel = rt2560_set_channel;
314 
315 	ic->ic_vap_create = rt2560_vap_create;
316 	ic->ic_vap_delete = rt2560_vap_delete;
317 
318 	ieee80211_radiotap_attach(ic,
319 	    &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
320 		RT2560_TX_RADIOTAP_PRESENT,
321 	    &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
322 		RT2560_RX_RADIOTAP_PRESENT);
323 
324 	/*
325 	 * Add a few sysctl knobs.
326 	 */
327 #ifdef RAL_DEBUG
328 	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
329 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
330 	    "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs");
331 #endif
332 	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
333 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
334 	    "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)");
335 
336 	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
337 	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
338 	    "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)");
339 
340 	if (bootverbose)
341 		ieee80211_announce(ic);
342 
343 	return 0;
344 
345 fail6:	rt2560_free_rx_ring(sc, &sc->rxq);
346 fail5:	rt2560_free_tx_ring(sc, &sc->bcnq);
347 fail4:	rt2560_free_tx_ring(sc, &sc->prioq);
348 fail3:	rt2560_free_tx_ring(sc, &sc->atimq);
349 fail2:	rt2560_free_tx_ring(sc, &sc->txq);
350 fail1:	mtx_destroy(&sc->sc_mtx);
351 
352 	return ENXIO;
353 }
354 
355 int
356 rt2560_detach(void *xsc)
357 {
358 	struct rt2560_softc *sc = xsc;
359 	struct ifnet *ifp = sc->sc_ifp;
360 	struct ieee80211com *ic = ifp->if_l2com;
361 
362 	rt2560_stop(sc);
363 
364 	ieee80211_ifdetach(ic);
365 
366 	rt2560_free_tx_ring(sc, &sc->txq);
367 	rt2560_free_tx_ring(sc, &sc->atimq);
368 	rt2560_free_tx_ring(sc, &sc->prioq);
369 	rt2560_free_tx_ring(sc, &sc->bcnq);
370 	rt2560_free_rx_ring(sc, &sc->rxq);
371 
372 	if_free(ifp);
373 
374 	mtx_destroy(&sc->sc_mtx);
375 
376 	return 0;
377 }
378 
379 static struct ieee80211vap *
380 rt2560_vap_create(struct ieee80211com *ic,
381 	const char name[IFNAMSIZ], int unit, int opmode, int flags,
382 	const uint8_t bssid[IEEE80211_ADDR_LEN],
383 	const uint8_t mac[IEEE80211_ADDR_LEN])
384 {
385 	struct ifnet *ifp = ic->ic_ifp;
386 	struct rt2560_vap *rvp;
387 	struct ieee80211vap *vap;
388 
389 	switch (opmode) {
390 	case IEEE80211_M_STA:
391 	case IEEE80211_M_IBSS:
392 	case IEEE80211_M_AHDEMO:
393 	case IEEE80211_M_MONITOR:
394 	case IEEE80211_M_HOSTAP:
395 	case IEEE80211_M_MBSS:
396 		/* XXXRP: TBD */
397 		if (!TAILQ_EMPTY(&ic->ic_vaps)) {
398 			if_printf(ifp, "only 1 vap supported\n");
399 			return NULL;
400 		}
401 		if (opmode == IEEE80211_M_STA)
402 			flags |= IEEE80211_CLONE_NOBEACONS;
403 		break;
404 	case IEEE80211_M_WDS:
405 		if (TAILQ_EMPTY(&ic->ic_vaps) ||
406 		    ic->ic_opmode != IEEE80211_M_HOSTAP) {
407 			if_printf(ifp, "wds only supported in ap mode\n");
408 			return NULL;
409 		}
410 		/*
411 		 * Silently remove any request for a unique
412 		 * bssid; WDS vap's always share the local
413 		 * mac address.
414 		 */
415 		flags &= ~IEEE80211_CLONE_BSSID;
416 		break;
417 	default:
418 		if_printf(ifp, "unknown opmode %d\n", opmode);
419 		return NULL;
420 	}
421 	rvp = (struct rt2560_vap *) malloc(sizeof(struct rt2560_vap),
422 	    M_80211_VAP, M_NOWAIT | M_ZERO);
423 	if (rvp == NULL)
424 		return NULL;
425 	vap = &rvp->ral_vap;
426 	ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
427 
428 	/* override state transition machine */
429 	rvp->ral_newstate = vap->iv_newstate;
430 	vap->iv_newstate = rt2560_newstate;
431 	vap->iv_update_beacon = rt2560_beacon_update;
432 
433 	ieee80211_amrr_init(&rvp->amrr, vap,
434 	    IEEE80211_AMRR_MIN_SUCCESS_THRESHOLD,
435 	    IEEE80211_AMRR_MAX_SUCCESS_THRESHOLD,
436 	    500 /* ms */);
437 
438 	/* complete setup */
439 	ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status);
440 	if (TAILQ_FIRST(&ic->ic_vaps) == vap)
441 		ic->ic_opmode = opmode;
442 	return vap;
443 }
444 
445 static void
446 rt2560_vap_delete(struct ieee80211vap *vap)
447 {
448 	struct rt2560_vap *rvp = RT2560_VAP(vap);
449 
450 	ieee80211_amrr_cleanup(&rvp->amrr);
451 	ieee80211_vap_detach(vap);
452 	free(rvp, M_80211_VAP);
453 }
454 
455 void
456 rt2560_resume(void *xsc)
457 {
458 	struct rt2560_softc *sc = xsc;
459 	struct ifnet *ifp = sc->sc_ifp;
460 
461 	if (ifp->if_flags & IFF_UP)
462 		rt2560_init(sc);
463 }
464 
465 static void
466 rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
467 {
468 	if (error != 0)
469 		return;
470 
471 	KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
472 
473 	*(bus_addr_t *)arg = segs[0].ds_addr;
474 }
475 
476 static int
477 rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring,
478     int count)
479 {
480 	int i, error;
481 
482 	ring->count = count;
483 	ring->queued = 0;
484 	ring->cur = ring->next = 0;
485 	ring->cur_encrypt = ring->next_encrypt = 0;
486 
487 	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
488 	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
489 	    count * RT2560_TX_DESC_SIZE, 1, count * RT2560_TX_DESC_SIZE,
490 	    0, NULL, NULL, &ring->desc_dmat);
491 	if (error != 0) {
492 		device_printf(sc->sc_dev, "could not create desc DMA tag\n");
493 		goto fail;
494 	}
495 
496 	error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
497 	    BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
498 	if (error != 0) {
499 		device_printf(sc->sc_dev, "could not allocate DMA memory\n");
500 		goto fail;
501 	}
502 
503 	error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
504 	    count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
505 	    0);
506 	if (error != 0) {
507 		device_printf(sc->sc_dev, "could not load desc DMA map\n");
508 		goto fail;
509 	}
510 
511 	ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF,
512 	    M_NOWAIT | M_ZERO);
513 	if (ring->data == NULL) {
514 		device_printf(sc->sc_dev, "could not allocate soft data\n");
515 		error = ENOMEM;
516 		goto fail;
517 	}
518 
519 	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
520 	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
521 	    MCLBYTES, RT2560_MAX_SCATTER, MCLBYTES, 0, NULL, NULL,
522 	    &ring->data_dmat);
523 	if (error != 0) {
524 		device_printf(sc->sc_dev, "could not create data DMA tag\n");
525 		goto fail;
526 	}
527 
528 	for (i = 0; i < count; i++) {
529 		error = bus_dmamap_create(ring->data_dmat, 0,
530 		    &ring->data[i].map);
531 		if (error != 0) {
532 			device_printf(sc->sc_dev, "could not create DMA map\n");
533 			goto fail;
534 		}
535 	}
536 
537 	return 0;
538 
539 fail:	rt2560_free_tx_ring(sc, ring);
540 	return error;
541 }
542 
543 static void
544 rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
545 {
546 	struct rt2560_tx_desc *desc;
547 	struct rt2560_tx_data *data;
548 	int i;
549 
550 	for (i = 0; i < ring->count; i++) {
551 		desc = &ring->desc[i];
552 		data = &ring->data[i];
553 
554 		if (data->m != NULL) {
555 			bus_dmamap_sync(ring->data_dmat, data->map,
556 			    BUS_DMASYNC_POSTWRITE);
557 			bus_dmamap_unload(ring->data_dmat, data->map);
558 			m_freem(data->m);
559 			data->m = NULL;
560 		}
561 
562 		if (data->ni != NULL) {
563 			ieee80211_free_node(data->ni);
564 			data->ni = NULL;
565 		}
566 
567 		desc->flags = 0;
568 	}
569 
570 	bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
571 
572 	ring->queued = 0;
573 	ring->cur = ring->next = 0;
574 	ring->cur_encrypt = ring->next_encrypt = 0;
575 }
576 
577 static void
578 rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
579 {
580 	struct rt2560_tx_data *data;
581 	int i;
582 
583 	if (ring->desc != NULL) {
584 		bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
585 		    BUS_DMASYNC_POSTWRITE);
586 		bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
587 		bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
588 	}
589 
590 	if (ring->desc_dmat != NULL)
591 		bus_dma_tag_destroy(ring->desc_dmat);
592 
593 	if (ring->data != NULL) {
594 		for (i = 0; i < ring->count; i++) {
595 			data = &ring->data[i];
596 
597 			if (data->m != NULL) {
598 				bus_dmamap_sync(ring->data_dmat, data->map,
599 				    BUS_DMASYNC_POSTWRITE);
600 				bus_dmamap_unload(ring->data_dmat, data->map);
601 				m_freem(data->m);
602 			}
603 
604 			if (data->ni != NULL)
605 				ieee80211_free_node(data->ni);
606 
607 			if (data->map != NULL)
608 				bus_dmamap_destroy(ring->data_dmat, data->map);
609 		}
610 
611 		free(ring->data, M_DEVBUF);
612 	}
613 
614 	if (ring->data_dmat != NULL)
615 		bus_dma_tag_destroy(ring->data_dmat);
616 }
617 
618 static int
619 rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring,
620     int count)
621 {
622 	struct rt2560_rx_desc *desc;
623 	struct rt2560_rx_data *data;
624 	bus_addr_t physaddr;
625 	int i, error;
626 
627 	ring->count = count;
628 	ring->cur = ring->next = 0;
629 	ring->cur_decrypt = 0;
630 
631 	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
632 	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
633 	    count * RT2560_RX_DESC_SIZE, 1, count * RT2560_RX_DESC_SIZE,
634 	    0, NULL, NULL, &ring->desc_dmat);
635 	if (error != 0) {
636 		device_printf(sc->sc_dev, "could not create desc DMA tag\n");
637 		goto fail;
638 	}
639 
640 	error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
641 	    BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
642 	if (error != 0) {
643 		device_printf(sc->sc_dev, "could not allocate DMA memory\n");
644 		goto fail;
645 	}
646 
647 	error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
648 	    count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
649 	    0);
650 	if (error != 0) {
651 		device_printf(sc->sc_dev, "could not load desc DMA map\n");
652 		goto fail;
653 	}
654 
655 	ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF,
656 	    M_NOWAIT | M_ZERO);
657 	if (ring->data == NULL) {
658 		device_printf(sc->sc_dev, "could not allocate soft data\n");
659 		error = ENOMEM;
660 		goto fail;
661 	}
662 
663 	/*
664 	 * Pre-allocate Rx buffers and populate Rx ring.
665 	 */
666 	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
667 	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
668 	    1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
669 	if (error != 0) {
670 		device_printf(sc->sc_dev, "could not create data DMA tag\n");
671 		goto fail;
672 	}
673 
674 	for (i = 0; i < count; i++) {
675 		desc = &sc->rxq.desc[i];
676 		data = &sc->rxq.data[i];
677 
678 		error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
679 		if (error != 0) {
680 			device_printf(sc->sc_dev, "could not create DMA map\n");
681 			goto fail;
682 		}
683 
684 		data->m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
685 		if (data->m == NULL) {
686 			device_printf(sc->sc_dev,
687 			    "could not allocate rx mbuf\n");
688 			error = ENOMEM;
689 			goto fail;
690 		}
691 
692 		error = bus_dmamap_load(ring->data_dmat, data->map,
693 		    mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr,
694 		    &physaddr, 0);
695 		if (error != 0) {
696 			device_printf(sc->sc_dev,
697 			    "could not load rx buf DMA map");
698 			goto fail;
699 		}
700 
701 		desc->flags = htole32(RT2560_RX_BUSY);
702 		desc->physaddr = htole32(physaddr);
703 	}
704 
705 	bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
706 
707 	return 0;
708 
709 fail:	rt2560_free_rx_ring(sc, ring);
710 	return error;
711 }
712 
713 static void
714 rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
715 {
716 	int i;
717 
718 	for (i = 0; i < ring->count; i++) {
719 		ring->desc[i].flags = htole32(RT2560_RX_BUSY);
720 		ring->data[i].drop = 0;
721 	}
722 
723 	bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
724 
725 	ring->cur = ring->next = 0;
726 	ring->cur_decrypt = 0;
727 }
728 
729 static void
730 rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
731 {
732 	struct rt2560_rx_data *data;
733 	int i;
734 
735 	if (ring->desc != NULL) {
736 		bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
737 		    BUS_DMASYNC_POSTWRITE);
738 		bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
739 		bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
740 	}
741 
742 	if (ring->desc_dmat != NULL)
743 		bus_dma_tag_destroy(ring->desc_dmat);
744 
745 	if (ring->data != NULL) {
746 		for (i = 0; i < ring->count; i++) {
747 			data = &ring->data[i];
748 
749 			if (data->m != NULL) {
750 				bus_dmamap_sync(ring->data_dmat, data->map,
751 				    BUS_DMASYNC_POSTREAD);
752 				bus_dmamap_unload(ring->data_dmat, data->map);
753 				m_freem(data->m);
754 			}
755 
756 			if (data->map != NULL)
757 				bus_dmamap_destroy(ring->data_dmat, data->map);
758 		}
759 
760 		free(ring->data, M_DEVBUF);
761 	}
762 
763 	if (ring->data_dmat != NULL)
764 		bus_dma_tag_destroy(ring->data_dmat);
765 }
766 
767 static struct ieee80211_node *
768 rt2560_node_alloc(struct ieee80211vap *vap,
769 	const uint8_t mac[IEEE80211_ADDR_LEN])
770 {
771 	struct rt2560_node *rn;
772 
773 	rn = malloc(sizeof (struct rt2560_node), M_80211_NODE,
774 	    M_NOWAIT | M_ZERO);
775 
776 	return (rn != NULL) ? &rn->ni : NULL;
777 }
778 
779 static void
780 rt2560_newassoc(struct ieee80211_node *ni, int isnew)
781 {
782 	struct ieee80211vap *vap = ni->ni_vap;
783 
784 	ieee80211_amrr_node_init(&RT2560_VAP(vap)->amrr,
785 	    &RT2560_NODE(ni)->amrr, ni);
786 }
787 
788 static int
789 rt2560_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
790 {
791 	struct rt2560_vap *rvp = RT2560_VAP(vap);
792 	struct ifnet *ifp = vap->iv_ic->ic_ifp;
793 	struct rt2560_softc *sc = ifp->if_softc;
794 	int error;
795 
796 	if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) {
797 		/* abort TSF synchronization */
798 		RAL_WRITE(sc, RT2560_CSR14, 0);
799 
800 		/* turn association led off */
801 		rt2560_update_led(sc, 0, 0);
802 	}
803 
804 	error = rvp->ral_newstate(vap, nstate, arg);
805 
806 	if (error == 0 && nstate == IEEE80211_S_RUN) {
807 		struct ieee80211_node *ni = vap->iv_bss;
808 		struct mbuf *m;
809 
810 		if (vap->iv_opmode != IEEE80211_M_MONITOR) {
811 			rt2560_update_plcp(sc);
812 			rt2560_set_basicrates(sc);
813 			rt2560_set_bssid(sc, ni->ni_bssid);
814 		}
815 
816 		if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
817 		    vap->iv_opmode == IEEE80211_M_IBSS ||
818 		    vap->iv_opmode == IEEE80211_M_MBSS) {
819 			m = ieee80211_beacon_alloc(ni, &rvp->ral_bo);
820 			if (m == NULL) {
821 				if_printf(ifp, "could not allocate beacon\n");
822 				return ENOBUFS;
823 			}
824 			ieee80211_ref_node(ni);
825 			error = rt2560_tx_bcn(sc, m, ni);
826 			if (error != 0)
827 				return error;
828 		}
829 
830 		/* turn assocation led on */
831 		rt2560_update_led(sc, 1, 0);
832 
833 		if (vap->iv_opmode != IEEE80211_M_MONITOR)
834 			rt2560_enable_tsf_sync(sc);
835 		else
836 			rt2560_enable_tsf(sc);
837 	}
838 	return error;
839 }
840 
841 /*
842  * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or
843  * 93C66).
844  */
845 static uint16_t
846 rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr)
847 {
848 	uint32_t tmp;
849 	uint16_t val;
850 	int n;
851 
852 	/* clock C once before the first command */
853 	RT2560_EEPROM_CTL(sc, 0);
854 
855 	RT2560_EEPROM_CTL(sc, RT2560_S);
856 	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
857 	RT2560_EEPROM_CTL(sc, RT2560_S);
858 
859 	/* write start bit (1) */
860 	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
861 	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
862 
863 	/* write READ opcode (10) */
864 	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
865 	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
866 	RT2560_EEPROM_CTL(sc, RT2560_S);
867 	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
868 
869 	/* write address (A5-A0 or A7-A0) */
870 	n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7;
871 	for (; n >= 0; n--) {
872 		RT2560_EEPROM_CTL(sc, RT2560_S |
873 		    (((addr >> n) & 1) << RT2560_SHIFT_D));
874 		RT2560_EEPROM_CTL(sc, RT2560_S |
875 		    (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C);
876 	}
877 
878 	RT2560_EEPROM_CTL(sc, RT2560_S);
879 
880 	/* read data Q15-Q0 */
881 	val = 0;
882 	for (n = 15; n >= 0; n--) {
883 		RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
884 		tmp = RAL_READ(sc, RT2560_CSR21);
885 		val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n;
886 		RT2560_EEPROM_CTL(sc, RT2560_S);
887 	}
888 
889 	RT2560_EEPROM_CTL(sc, 0);
890 
891 	/* clear Chip Select and clock C */
892 	RT2560_EEPROM_CTL(sc, RT2560_S);
893 	RT2560_EEPROM_CTL(sc, 0);
894 	RT2560_EEPROM_CTL(sc, RT2560_C);
895 
896 	return val;
897 }
898 
899 /*
900  * Some frames were processed by the hardware cipher engine and are ready for
901  * transmission.
902  */
903 static void
904 rt2560_encryption_intr(struct rt2560_softc *sc)
905 {
906 	struct rt2560_tx_desc *desc;
907 	int hw;
908 
909 	/* retrieve last descriptor index processed by cipher engine */
910 	hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr;
911 	hw /= RT2560_TX_DESC_SIZE;
912 
913 	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
914 	    BUS_DMASYNC_POSTREAD);
915 
916 	while (sc->txq.next_encrypt != hw) {
917 		if (sc->txq.next_encrypt == sc->txq.cur_encrypt) {
918 			printf("hw encrypt %d, cur_encrypt %d\n", hw,
919 			    sc->txq.cur_encrypt);
920 			break;
921 		}
922 
923 		desc = &sc->txq.desc[sc->txq.next_encrypt];
924 
925 		if ((le32toh(desc->flags) & RT2560_TX_BUSY) ||
926 		    (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY))
927 			break;
928 
929 		/* for TKIP, swap eiv field to fix a bug in ASIC */
930 		if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) ==
931 		    RT2560_TX_CIPHER_TKIP)
932 			desc->eiv = bswap32(desc->eiv);
933 
934 		/* mark the frame ready for transmission */
935 		desc->flags |= htole32(RT2560_TX_VALID);
936 		desc->flags |= htole32(RT2560_TX_BUSY);
937 
938 		DPRINTFN(sc, 15, "encryption done idx=%u\n",
939 		    sc->txq.next_encrypt);
940 
941 		sc->txq.next_encrypt =
942 		    (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT;
943 	}
944 
945 	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
946 	    BUS_DMASYNC_PREWRITE);
947 
948 	/* kick Tx */
949 	RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX);
950 }
951 
952 static void
953 rt2560_tx_intr(struct rt2560_softc *sc)
954 {
955 	struct ifnet *ifp = sc->sc_ifp;
956 	struct rt2560_tx_desc *desc;
957 	struct rt2560_tx_data *data;
958 	struct rt2560_node *rn;
959 	struct mbuf *m;
960 	uint32_t flags;
961 	int retrycnt;
962 
963 	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
964 	    BUS_DMASYNC_POSTREAD);
965 
966 	for (;;) {
967 		desc = &sc->txq.desc[sc->txq.next];
968 		data = &sc->txq.data[sc->txq.next];
969 
970 		flags = le32toh(desc->flags);
971 		if ((flags & RT2560_TX_BUSY) ||
972 		    (flags & RT2560_TX_CIPHER_BUSY) ||
973 		    !(flags & RT2560_TX_VALID))
974 			break;
975 
976 		rn = (struct rt2560_node *)data->ni;
977 		m = data->m;
978 
979 		switch (flags & RT2560_TX_RESULT_MASK) {
980 		case RT2560_TX_SUCCESS:
981 			DPRINTFN(sc, 10, "%s\n", "data frame sent successfully");
982 			if (data->rix != IEEE80211_FIXED_RATE_NONE)
983 				ieee80211_amrr_tx_complete(&rn->amrr,
984 				    IEEE80211_AMRR_SUCCESS, 0);
985 			ifp->if_opackets++;
986 			break;
987 
988 		case RT2560_TX_SUCCESS_RETRY:
989 			retrycnt = RT2560_TX_RETRYCNT(flags);
990 
991 			DPRINTFN(sc, 9, "data frame sent after %u retries\n",
992 			    retrycnt);
993 			if (data->rix != IEEE80211_FIXED_RATE_NONE)
994 				ieee80211_amrr_tx_complete(&rn->amrr,
995 				    IEEE80211_AMRR_SUCCESS, retrycnt);
996 			ifp->if_opackets++;
997 			break;
998 
999 		case RT2560_TX_FAIL_RETRY:
1000 			retrycnt = RT2560_TX_RETRYCNT(flags);
1001 
1002 			DPRINTFN(sc, 9, "data frame failed after %d retries\n",
1003 			    retrycnt);
1004 			if (data->rix != IEEE80211_FIXED_RATE_NONE)
1005 				ieee80211_amrr_tx_complete(&rn->amrr,
1006 				    IEEE80211_AMRR_FAILURE, retrycnt);
1007 			ifp->if_oerrors++;
1008 			break;
1009 
1010 		case RT2560_TX_FAIL_INVALID:
1011 		case RT2560_TX_FAIL_OTHER:
1012 		default:
1013 			device_printf(sc->sc_dev, "sending data frame failed "
1014 			    "0x%08x\n", flags);
1015 			ifp->if_oerrors++;
1016 		}
1017 
1018 		bus_dmamap_sync(sc->txq.data_dmat, data->map,
1019 		    BUS_DMASYNC_POSTWRITE);
1020 		bus_dmamap_unload(sc->txq.data_dmat, data->map);
1021 		m_freem(m);
1022 		data->m = NULL;
1023 		ieee80211_free_node(data->ni);
1024 		data->ni = NULL;
1025 
1026 		/* descriptor is no longer valid */
1027 		desc->flags &= ~htole32(RT2560_TX_VALID);
1028 
1029 		DPRINTFN(sc, 15, "tx done idx=%u\n", sc->txq.next);
1030 
1031 		sc->txq.queued--;
1032 		sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT;
1033 	}
1034 
1035 	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1036 	    BUS_DMASYNC_PREWRITE);
1037 
1038 	if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1039 		sc->sc_tx_timer = 0;
1040 
1041 	if (sc->txq.queued < RT2560_TX_RING_COUNT - 1) {
1042 		sc->sc_flags &= ~RT2560_F_DATA_OACTIVE;
1043 		if ((sc->sc_flags &
1044 		     (RT2560_F_DATA_OACTIVE | RT2560_F_PRIO_OACTIVE)) == 0)
1045 			ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1046 		rt2560_start_locked(ifp);
1047 	}
1048 }
1049 
1050 static void
1051 rt2560_prio_intr(struct rt2560_softc *sc)
1052 {
1053 	struct ifnet *ifp = sc->sc_ifp;
1054 	struct rt2560_tx_desc *desc;
1055 	struct rt2560_tx_data *data;
1056 	struct ieee80211_node *ni;
1057 	struct mbuf *m;
1058 	int flags;
1059 
1060 	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1061 	    BUS_DMASYNC_POSTREAD);
1062 
1063 	for (;;) {
1064 		desc = &sc->prioq.desc[sc->prioq.next];
1065 		data = &sc->prioq.data[sc->prioq.next];
1066 
1067 		flags = le32toh(desc->flags);
1068 		if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0)
1069 			break;
1070 
1071 		switch (flags & RT2560_TX_RESULT_MASK) {
1072 		case RT2560_TX_SUCCESS:
1073 			DPRINTFN(sc, 10, "%s\n", "mgt frame sent successfully");
1074 			break;
1075 
1076 		case RT2560_TX_SUCCESS_RETRY:
1077 			DPRINTFN(sc, 9, "mgt frame sent after %u retries\n",
1078 			    (flags >> 5) & 0x7);
1079 			break;
1080 
1081 		case RT2560_TX_FAIL_RETRY:
1082 			DPRINTFN(sc, 9, "%s\n",
1083 			    "sending mgt frame failed (too much retries)");
1084 			break;
1085 
1086 		case RT2560_TX_FAIL_INVALID:
1087 		case RT2560_TX_FAIL_OTHER:
1088 		default:
1089 			device_printf(sc->sc_dev, "sending mgt frame failed "
1090 			    "0x%08x\n", flags);
1091 			break;
1092 		}
1093 
1094 		bus_dmamap_sync(sc->prioq.data_dmat, data->map,
1095 		    BUS_DMASYNC_POSTWRITE);
1096 		bus_dmamap_unload(sc->prioq.data_dmat, data->map);
1097 
1098 		m = data->m;
1099 		data->m = NULL;
1100 		ni = data->ni;
1101 		data->ni = NULL;
1102 
1103 		/* descriptor is no longer valid */
1104 		desc->flags &= ~htole32(RT2560_TX_VALID);
1105 
1106 		DPRINTFN(sc, 15, "prio done idx=%u\n", sc->prioq.next);
1107 
1108 		sc->prioq.queued--;
1109 		sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT;
1110 
1111 		if (m->m_flags & M_TXCB)
1112 			ieee80211_process_callback(ni, m,
1113 				(flags & RT2560_TX_RESULT_MASK) &~
1114 				(RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY));
1115 		m_freem(m);
1116 		ieee80211_free_node(ni);
1117 	}
1118 
1119 	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1120 	    BUS_DMASYNC_PREWRITE);
1121 
1122 	if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1123 		sc->sc_tx_timer = 0;
1124 
1125 	if (sc->prioq.queued < RT2560_PRIO_RING_COUNT) {
1126 		sc->sc_flags &= ~RT2560_F_PRIO_OACTIVE;
1127 		if ((sc->sc_flags &
1128 		     (RT2560_F_DATA_OACTIVE | RT2560_F_PRIO_OACTIVE)) == 0)
1129 			ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1130 		rt2560_start_locked(ifp);
1131 	}
1132 }
1133 
1134 /*
1135  * Some frames were processed by the hardware cipher engine and are ready for
1136  * handoff to the IEEE802.11 layer.
1137  */
1138 static void
1139 rt2560_decryption_intr(struct rt2560_softc *sc)
1140 {
1141 	struct ifnet *ifp = sc->sc_ifp;
1142 	struct ieee80211com *ic = ifp->if_l2com;
1143 	struct rt2560_rx_desc *desc;
1144 	struct rt2560_rx_data *data;
1145 	bus_addr_t physaddr;
1146 	struct ieee80211_frame *wh;
1147 	struct ieee80211_node *ni;
1148 	struct mbuf *mnew, *m;
1149 	int hw, error;
1150 	int8_t rssi, nf;
1151 
1152 	/* retrieve last decriptor index processed by cipher engine */
1153 	hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr;
1154 	hw /= RT2560_RX_DESC_SIZE;
1155 
1156 	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1157 	    BUS_DMASYNC_POSTREAD);
1158 
1159 	for (; sc->rxq.cur_decrypt != hw;) {
1160 		desc = &sc->rxq.desc[sc->rxq.cur_decrypt];
1161 		data = &sc->rxq.data[sc->rxq.cur_decrypt];
1162 
1163 		if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1164 		    (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1165 			break;
1166 
1167 		if (data->drop) {
1168 			ifp->if_ierrors++;
1169 			goto skip;
1170 		}
1171 
1172 		if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 &&
1173 		    (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) {
1174 			ifp->if_ierrors++;
1175 			goto skip;
1176 		}
1177 
1178 		/*
1179 		 * Try to allocate a new mbuf for this ring element and load it
1180 		 * before processing the current mbuf. If the ring element
1181 		 * cannot be loaded, drop the received packet and reuse the old
1182 		 * mbuf. In the unlikely case that the old mbuf can't be
1183 		 * reloaded either, explicitly panic.
1184 		 */
1185 		mnew = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
1186 		if (mnew == NULL) {
1187 			ifp->if_ierrors++;
1188 			goto skip;
1189 		}
1190 
1191 		bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1192 		    BUS_DMASYNC_POSTREAD);
1193 		bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1194 
1195 		error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1196 		    mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr,
1197 		    &physaddr, 0);
1198 		if (error != 0) {
1199 			m_freem(mnew);
1200 
1201 			/* try to reload the old mbuf */
1202 			error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1203 			    mtod(data->m, void *), MCLBYTES,
1204 			    rt2560_dma_map_addr, &physaddr, 0);
1205 			if (error != 0) {
1206 				/* very unlikely that it will fail... */
1207 				panic("%s: could not load old rx mbuf",
1208 				    device_get_name(sc->sc_dev));
1209 			}
1210 			ifp->if_ierrors++;
1211 			goto skip;
1212 		}
1213 
1214 		/*
1215 	 	 * New mbuf successfully loaded, update Rx ring and continue
1216 		 * processing.
1217 		 */
1218 		m = data->m;
1219 		data->m = mnew;
1220 		desc->physaddr = htole32(physaddr);
1221 
1222 		/* finalize mbuf */
1223 		m->m_pkthdr.rcvif = ifp;
1224 		m->m_pkthdr.len = m->m_len =
1225 		    (le32toh(desc->flags) >> 16) & 0xfff;
1226 
1227 		rssi = RT2560_RSSI(sc, desc->rssi);
1228 		nf = RT2560_NOISE_FLOOR;
1229 		if (ieee80211_radiotap_active(ic)) {
1230 			struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap;
1231 			uint32_t tsf_lo, tsf_hi;
1232 
1233 			/* get timestamp (low and high 32 bits) */
1234 			tsf_hi = RAL_READ(sc, RT2560_CSR17);
1235 			tsf_lo = RAL_READ(sc, RT2560_CSR16);
1236 
1237 			tap->wr_tsf =
1238 			    htole64(((uint64_t)tsf_hi << 32) | tsf_lo);
1239 			tap->wr_flags = 0;
1240 			tap->wr_rate = ieee80211_plcp2rate(desc->rate,
1241 			    (desc->flags & htole32(RT2560_RX_OFDM)) ?
1242 				IEEE80211_T_OFDM : IEEE80211_T_CCK);
1243 			tap->wr_antenna = sc->rx_ant;
1244 			tap->wr_antsignal = nf + rssi;
1245 			tap->wr_antnoise = nf;
1246 		}
1247 
1248 		sc->sc_flags |= RT2560_F_INPUT_RUNNING;
1249 		RAL_UNLOCK(sc);
1250 		wh = mtod(m, struct ieee80211_frame *);
1251 		ni = ieee80211_find_rxnode(ic,
1252 		    (struct ieee80211_frame_min *)wh);
1253 		if (ni != NULL) {
1254 			(void) ieee80211_input(ni, m, rssi, nf);
1255 			ieee80211_free_node(ni);
1256 		} else
1257 			(void) ieee80211_input_all(ic, m, rssi, nf);
1258 
1259 		RAL_LOCK(sc);
1260 		sc->sc_flags &= ~RT2560_F_INPUT_RUNNING;
1261 skip:		desc->flags = htole32(RT2560_RX_BUSY);
1262 
1263 		DPRINTFN(sc, 15, "decryption done idx=%u\n", sc->rxq.cur_decrypt);
1264 
1265 		sc->rxq.cur_decrypt =
1266 		    (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT;
1267 	}
1268 
1269 	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1270 	    BUS_DMASYNC_PREWRITE);
1271 }
1272 
1273 /*
1274  * Some frames were received. Pass them to the hardware cipher engine before
1275  * sending them to the 802.11 layer.
1276  */
1277 static void
1278 rt2560_rx_intr(struct rt2560_softc *sc)
1279 {
1280 	struct rt2560_rx_desc *desc;
1281 	struct rt2560_rx_data *data;
1282 
1283 	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1284 	    BUS_DMASYNC_POSTREAD);
1285 
1286 	for (;;) {
1287 		desc = &sc->rxq.desc[sc->rxq.cur];
1288 		data = &sc->rxq.data[sc->rxq.cur];
1289 
1290 		if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1291 		    (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1292 			break;
1293 
1294 		data->drop = 0;
1295 
1296 		if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) ||
1297 		    (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) {
1298 			/*
1299 			 * This should not happen since we did not request
1300 			 * to receive those frames when we filled RXCSR0.
1301 			 */
1302 			DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n",
1303 			    le32toh(desc->flags));
1304 			data->drop = 1;
1305 		}
1306 
1307 		if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) {
1308 			DPRINTFN(sc, 5, "%s\n", "bad length");
1309 			data->drop = 1;
1310 		}
1311 
1312 		/* mark the frame for decryption */
1313 		desc->flags |= htole32(RT2560_RX_CIPHER_BUSY);
1314 
1315 		DPRINTFN(sc, 15, "rx done idx=%u\n", sc->rxq.cur);
1316 
1317 		sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT;
1318 	}
1319 
1320 	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1321 	    BUS_DMASYNC_PREWRITE);
1322 
1323 	/* kick decrypt */
1324 	RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT);
1325 }
1326 
1327 static void
1328 rt2560_beacon_update(struct ieee80211vap *vap, int item)
1329 {
1330 	struct rt2560_vap *rvp = RT2560_VAP(vap);
1331 	struct ieee80211_beacon_offsets *bo = &rvp->ral_bo;
1332 
1333 	setbit(bo->bo_flags, item);
1334 }
1335 
1336 /*
1337  * This function is called periodically in IBSS mode when a new beacon must be
1338  * sent out.
1339  */
1340 static void
1341 rt2560_beacon_expire(struct rt2560_softc *sc)
1342 {
1343 	struct ifnet *ifp = sc->sc_ifp;
1344 	struct ieee80211com *ic = ifp->if_l2com;
1345 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1346 	struct rt2560_vap *rvp = RT2560_VAP(vap);
1347 	struct rt2560_tx_data *data;
1348 
1349 	if (ic->ic_opmode != IEEE80211_M_IBSS &&
1350 	    ic->ic_opmode != IEEE80211_M_HOSTAP &&
1351 	    ic->ic_opmode != IEEE80211_M_MBSS)
1352 		return;
1353 
1354 	data = &sc->bcnq.data[sc->bcnq.next];
1355 	/*
1356 	 * Don't send beacon if bsschan isn't set
1357 	 */
1358 	if (data->ni == NULL)
1359 	        return;
1360 
1361 	bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE);
1362 	bus_dmamap_unload(sc->bcnq.data_dmat, data->map);
1363 
1364 	/* XXX 1 =>'s mcast frames which means all PS sta's will wakeup! */
1365 	ieee80211_beacon_update(data->ni, &rvp->ral_bo, data->m, 1);
1366 
1367 	rt2560_tx_bcn(sc, data->m, data->ni);
1368 
1369 	DPRINTFN(sc, 15, "%s", "beacon expired\n");
1370 
1371 	sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT;
1372 }
1373 
1374 /* ARGSUSED */
1375 static void
1376 rt2560_wakeup_expire(struct rt2560_softc *sc)
1377 {
1378 	DPRINTFN(sc, 2, "%s", "wakeup expired\n");
1379 }
1380 
1381 void
1382 rt2560_intr(void *arg)
1383 {
1384 	struct rt2560_softc *sc = arg;
1385 	struct ifnet *ifp = sc->sc_ifp;
1386 	uint32_t r;
1387 
1388 	RAL_LOCK(sc);
1389 
1390 	/* disable interrupts */
1391 	RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
1392 
1393 	/* don't re-enable interrupts if we're shutting down */
1394 	if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1395 		RAL_UNLOCK(sc);
1396 		return;
1397 	}
1398 
1399 	r = RAL_READ(sc, RT2560_CSR7);
1400 	RAL_WRITE(sc, RT2560_CSR7, r);
1401 
1402 	if (r & RT2560_BEACON_EXPIRE)
1403 		rt2560_beacon_expire(sc);
1404 
1405 	if (r & RT2560_WAKEUP_EXPIRE)
1406 		rt2560_wakeup_expire(sc);
1407 
1408 	if (r & RT2560_ENCRYPTION_DONE)
1409 		rt2560_encryption_intr(sc);
1410 
1411 	if (r & RT2560_TX_DONE)
1412 		rt2560_tx_intr(sc);
1413 
1414 	if (r & RT2560_PRIO_DONE)
1415 		rt2560_prio_intr(sc);
1416 
1417 	if (r & RT2560_DECRYPTION_DONE)
1418 		rt2560_decryption_intr(sc);
1419 
1420 	if (r & RT2560_RX_DONE) {
1421 		rt2560_rx_intr(sc);
1422 		rt2560_encryption_intr(sc);
1423 	}
1424 
1425 	/* re-enable interrupts */
1426 	RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
1427 
1428 	RAL_UNLOCK(sc);
1429 }
1430 
1431 #define RAL_SIFS		10	/* us */
1432 
1433 #define RT2560_TXRX_TURNAROUND	10	/* us */
1434 
1435 static uint8_t
1436 rt2560_plcp_signal(int rate)
1437 {
1438 	switch (rate) {
1439 	/* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1440 	case 12:	return 0xb;
1441 	case 18:	return 0xf;
1442 	case 24:	return 0xa;
1443 	case 36:	return 0xe;
1444 	case 48:	return 0x9;
1445 	case 72:	return 0xd;
1446 	case 96:	return 0x8;
1447 	case 108:	return 0xc;
1448 
1449 	/* CCK rates (NB: not IEEE std, device-specific) */
1450 	case 2:		return 0x0;
1451 	case 4:		return 0x1;
1452 	case 11:	return 0x2;
1453 	case 22:	return 0x3;
1454 	}
1455 	return 0xff;		/* XXX unsupported/unknown rate */
1456 }
1457 
1458 static void
1459 rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc,
1460     uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr)
1461 {
1462 	struct ifnet *ifp = sc->sc_ifp;
1463 	struct ieee80211com *ic = ifp->if_l2com;
1464 	uint16_t plcp_length;
1465 	int remainder;
1466 
1467 	desc->flags = htole32(flags);
1468 	desc->flags |= htole32(len << 16);
1469 
1470 	desc->physaddr = htole32(physaddr);
1471 	desc->wme = htole16(
1472 	    RT2560_AIFSN(2) |
1473 	    RT2560_LOGCWMIN(3) |
1474 	    RT2560_LOGCWMAX(8));
1475 
1476 	/* setup PLCP fields */
1477 	desc->plcp_signal  = rt2560_plcp_signal(rate);
1478 	desc->plcp_service = 4;
1479 
1480 	len += IEEE80211_CRC_LEN;
1481 	if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) {
1482 		desc->flags |= htole32(RT2560_TX_OFDM);
1483 
1484 		plcp_length = len & 0xfff;
1485 		desc->plcp_length_hi = plcp_length >> 6;
1486 		desc->plcp_length_lo = plcp_length & 0x3f;
1487 	} else {
1488 		plcp_length = (16 * len + rate - 1) / rate;
1489 		if (rate == 22) {
1490 			remainder = (16 * len) % 22;
1491 			if (remainder != 0 && remainder < 7)
1492 				desc->plcp_service |= RT2560_PLCP_LENGEXT;
1493 		}
1494 		desc->plcp_length_hi = plcp_length >> 8;
1495 		desc->plcp_length_lo = plcp_length & 0xff;
1496 
1497 		if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
1498 			desc->plcp_signal |= 0x08;
1499 	}
1500 
1501 	if (!encrypt)
1502 		desc->flags |= htole32(RT2560_TX_VALID);
1503 	desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY)
1504 			       : htole32(RT2560_TX_BUSY);
1505 }
1506 
1507 static int
1508 rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0,
1509     struct ieee80211_node *ni)
1510 {
1511 	struct ieee80211vap *vap = ni->ni_vap;
1512 	struct rt2560_tx_desc *desc;
1513 	struct rt2560_tx_data *data;
1514 	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1515 	int nsegs, rate, error;
1516 
1517 	desc = &sc->bcnq.desc[sc->bcnq.cur];
1518 	data = &sc->bcnq.data[sc->bcnq.cur];
1519 
1520 	/* XXX maybe a separate beacon rate? */
1521 	rate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].mgmtrate;
1522 
1523 	error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0,
1524 	    segs, &nsegs, BUS_DMA_NOWAIT);
1525 	if (error != 0) {
1526 		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1527 		    error);
1528 		m_freem(m0);
1529 		return error;
1530 	}
1531 
1532 	if (ieee80211_radiotap_active_vap(vap)) {
1533 		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1534 
1535 		tap->wt_flags = 0;
1536 		tap->wt_rate = rate;
1537 		tap->wt_antenna = sc->tx_ant;
1538 
1539 		ieee80211_radiotap_tx(vap, m0);
1540 	}
1541 
1542 	data->m = m0;
1543 	data->ni = ni;
1544 
1545 	rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF |
1546 	    RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr);
1547 
1548 	DPRINTFN(sc, 10, "sending beacon frame len=%u idx=%u rate=%u\n",
1549 	    m0->m_pkthdr.len, sc->bcnq.cur, rate);
1550 
1551 	bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1552 	bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map,
1553 	    BUS_DMASYNC_PREWRITE);
1554 
1555 	sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT;
1556 
1557 	return 0;
1558 }
1559 
1560 static int
1561 rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0,
1562     struct ieee80211_node *ni)
1563 {
1564 	struct ieee80211vap *vap = ni->ni_vap;
1565 	struct ieee80211com *ic = ni->ni_ic;
1566 	struct rt2560_tx_desc *desc;
1567 	struct rt2560_tx_data *data;
1568 	struct ieee80211_frame *wh;
1569 	struct ieee80211_key *k;
1570 	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1571 	uint16_t dur;
1572 	uint32_t flags = 0;
1573 	int nsegs, rate, error;
1574 
1575 	desc = &sc->prioq.desc[sc->prioq.cur];
1576 	data = &sc->prioq.data[sc->prioq.cur];
1577 
1578 	rate = vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)].mgmtrate;
1579 
1580 	wh = mtod(m0, struct ieee80211_frame *);
1581 
1582 	if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1583 		k = ieee80211_crypto_encap(ni, m0);
1584 		if (k == NULL) {
1585 			m_freem(m0);
1586 			return ENOBUFS;
1587 		}
1588 	}
1589 
1590 	error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0,
1591 	    segs, &nsegs, 0);
1592 	if (error != 0) {
1593 		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1594 		    error);
1595 		m_freem(m0);
1596 		return error;
1597 	}
1598 
1599 	if (ieee80211_radiotap_active_vap(vap)) {
1600 		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1601 
1602 		tap->wt_flags = 0;
1603 		tap->wt_rate = rate;
1604 		tap->wt_antenna = sc->tx_ant;
1605 
1606 		ieee80211_radiotap_tx(vap, m0);
1607 	}
1608 
1609 	data->m = m0;
1610 	data->ni = ni;
1611 	/* management frames are not taken into account for amrr */
1612 	data->rix = IEEE80211_FIXED_RATE_NONE;
1613 
1614 	wh = mtod(m0, struct ieee80211_frame *);
1615 
1616 	if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1617 		flags |= RT2560_TX_ACK;
1618 
1619 		dur = ieee80211_ack_duration(ic->ic_rt,
1620 		    rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1621 		*(uint16_t *)wh->i_dur = htole16(dur);
1622 
1623 		/* tell hardware to add timestamp for probe responses */
1624 		if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
1625 		    IEEE80211_FC0_TYPE_MGT &&
1626 		    (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
1627 		    IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1628 			flags |= RT2560_TX_TIMESTAMP;
1629 	}
1630 
1631 	rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0,
1632 	    segs->ds_addr);
1633 
1634 	bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1635 	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1636 	    BUS_DMASYNC_PREWRITE);
1637 
1638 	DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n",
1639 	    m0->m_pkthdr.len, sc->prioq.cur, rate);
1640 
1641 	/* kick prio */
1642 	sc->prioq.queued++;
1643 	sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1644 	RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1645 
1646 	return 0;
1647 }
1648 
1649 static int
1650 rt2560_sendprot(struct rt2560_softc *sc,
1651     const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate)
1652 {
1653 	struct ieee80211com *ic = ni->ni_ic;
1654 	const struct ieee80211_frame *wh;
1655 	struct rt2560_tx_desc *desc;
1656 	struct rt2560_tx_data *data;
1657 	struct mbuf *mprot;
1658 	int protrate, ackrate, pktlen, flags, isshort, error;
1659 	uint16_t dur;
1660 	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1661 	int nsegs;
1662 
1663 	KASSERT(prot == IEEE80211_PROT_RTSCTS || prot == IEEE80211_PROT_CTSONLY,
1664 	    ("protection %d", prot));
1665 
1666 	wh = mtod(m, const struct ieee80211_frame *);
1667 	pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN;
1668 
1669 	protrate = ieee80211_ctl_rate(ic->ic_rt, rate);
1670 	ackrate = ieee80211_ack_rate(ic->ic_rt, rate);
1671 
1672 	isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0;
1673 	dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort)
1674 	    + ieee80211_ack_duration(ic->ic_rt, rate, isshort);
1675 	flags = RT2560_TX_MORE_FRAG;
1676 	if (prot == IEEE80211_PROT_RTSCTS) {
1677 		/* NB: CTS is the same size as an ACK */
1678 		dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort);
1679 		flags |= RT2560_TX_ACK;
1680 		mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur);
1681 	} else {
1682 		mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur);
1683 	}
1684 	if (mprot == NULL) {
1685 		/* XXX stat + msg */
1686 		return ENOBUFS;
1687 	}
1688 
1689 	desc = &sc->txq.desc[sc->txq.cur_encrypt];
1690 	data = &sc->txq.data[sc->txq.cur_encrypt];
1691 
1692 	error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map,
1693 	    mprot, segs, &nsegs, 0);
1694 	if (error != 0) {
1695 		device_printf(sc->sc_dev,
1696 		    "could not map mbuf (error %d)\n", error);
1697 		m_freem(mprot);
1698 		return error;
1699 	}
1700 
1701 	data->m = mprot;
1702 	data->ni = ieee80211_ref_node(ni);
1703 	/* ctl frames are not taken into account for amrr */
1704 	data->rix = IEEE80211_FIXED_RATE_NONE;
1705 
1706 	rt2560_setup_tx_desc(sc, desc, flags, mprot->m_pkthdr.len, protrate, 1,
1707 	    segs->ds_addr);
1708 
1709 	bus_dmamap_sync(sc->txq.data_dmat, data->map,
1710 	    BUS_DMASYNC_PREWRITE);
1711 
1712 	sc->txq.queued++;
1713 	sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1714 
1715 	return 0;
1716 }
1717 
1718 static int
1719 rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0,
1720     struct ieee80211_node *ni, const struct ieee80211_bpf_params *params)
1721 {
1722 	struct ieee80211vap *vap = ni->ni_vap;
1723 	struct ieee80211com *ic = ni->ni_ic;
1724 	struct rt2560_tx_desc *desc;
1725 	struct rt2560_tx_data *data;
1726 	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1727 	uint32_t flags;
1728 	int nsegs, rate, error;
1729 
1730 	desc = &sc->prioq.desc[sc->prioq.cur];
1731 	data = &sc->prioq.data[sc->prioq.cur];
1732 
1733 	rate = params->ibp_rate0;
1734 	if (!ieee80211_isratevalid(ic->ic_rt, rate)) {
1735 		/* XXX fall back to mcast/mgmt rate? */
1736 		m_freem(m0);
1737 		return EINVAL;
1738 	}
1739 
1740 	flags = 0;
1741 	if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0)
1742 		flags |= RT2560_TX_ACK;
1743 	if (params->ibp_flags & (IEEE80211_BPF_RTS|IEEE80211_BPF_CTS)) {
1744 		error = rt2560_sendprot(sc, m0, ni,
1745 		    params->ibp_flags & IEEE80211_BPF_RTS ?
1746 			 IEEE80211_PROT_RTSCTS : IEEE80211_PROT_CTSONLY,
1747 		    rate);
1748 		if (error) {
1749 			m_freem(m0);
1750 			return error;
1751 		}
1752 		flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1753 	}
1754 
1755 	error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0,
1756 	    segs, &nsegs, 0);
1757 	if (error != 0) {
1758 		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1759 		    error);
1760 		m_freem(m0);
1761 		return error;
1762 	}
1763 
1764 	if (ieee80211_radiotap_active_vap(vap)) {
1765 		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1766 
1767 		tap->wt_flags = 0;
1768 		tap->wt_rate = rate;
1769 		tap->wt_antenna = sc->tx_ant;
1770 
1771 		ieee80211_radiotap_tx(ni->ni_vap, m0);
1772 	}
1773 
1774 	data->m = m0;
1775 	data->ni = ni;
1776 
1777 	/* XXX need to setup descriptor ourself */
1778 	rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len,
1779 	    rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0,
1780 	    segs->ds_addr);
1781 
1782 	bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1783 	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1784 	    BUS_DMASYNC_PREWRITE);
1785 
1786 	DPRINTFN(sc, 10, "sending raw frame len=%u idx=%u rate=%u\n",
1787 	    m0->m_pkthdr.len, sc->prioq.cur, rate);
1788 
1789 	/* kick prio */
1790 	sc->prioq.queued++;
1791 	sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1792 	RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1793 
1794 	return 0;
1795 }
1796 
1797 static int
1798 rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0,
1799     struct ieee80211_node *ni)
1800 {
1801 	struct ieee80211vap *vap = ni->ni_vap;
1802 	struct ieee80211com *ic = ni->ni_ic;
1803 	struct rt2560_tx_desc *desc;
1804 	struct rt2560_tx_data *data;
1805 	struct ieee80211_frame *wh;
1806 	const struct ieee80211_txparam *tp;
1807 	struct ieee80211_key *k;
1808 	struct mbuf *mnew;
1809 	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1810 	uint16_t dur;
1811 	uint32_t flags;
1812 	int nsegs, rate, error;
1813 
1814 	wh = mtod(m0, struct ieee80211_frame *);
1815 
1816 	tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)];
1817 	if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1818 		rate = tp->mcastrate;
1819 	} else if (m0->m_flags & M_EAPOL) {
1820 		rate = tp->mgmtrate;
1821 	} else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
1822 		rate = tp->ucastrate;
1823 	} else {
1824 		(void) ieee80211_amrr_choose(ni, &RT2560_NODE(ni)->amrr);
1825 		rate = ni->ni_txrate;
1826 	}
1827 
1828 	if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
1829 		k = ieee80211_crypto_encap(ni, m0);
1830 		if (k == NULL) {
1831 			m_freem(m0);
1832 			return ENOBUFS;
1833 		}
1834 
1835 		/* packet header may have moved, reset our local pointer */
1836 		wh = mtod(m0, struct ieee80211_frame *);
1837 	}
1838 
1839 	flags = 0;
1840 	if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1841 		int prot = IEEE80211_PROT_NONE;
1842 		if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold)
1843 			prot = IEEE80211_PROT_RTSCTS;
1844 		else if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1845 		    ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM)
1846 			prot = ic->ic_protmode;
1847 		if (prot != IEEE80211_PROT_NONE) {
1848 			error = rt2560_sendprot(sc, m0, ni, prot, rate);
1849 			if (error) {
1850 				m_freem(m0);
1851 				return error;
1852 			}
1853 			flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1854 		}
1855 	}
1856 
1857 	data = &sc->txq.data[sc->txq.cur_encrypt];
1858 	desc = &sc->txq.desc[sc->txq.cur_encrypt];
1859 
1860 	error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0,
1861 	    segs, &nsegs, 0);
1862 	if (error != 0 && error != EFBIG) {
1863 		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1864 		    error);
1865 		m_freem(m0);
1866 		return error;
1867 	}
1868 	if (error != 0) {
1869 		mnew = m_defrag(m0, M_DONTWAIT);
1870 		if (mnew == NULL) {
1871 			device_printf(sc->sc_dev,
1872 			    "could not defragment mbuf\n");
1873 			m_freem(m0);
1874 			return ENOBUFS;
1875 		}
1876 		m0 = mnew;
1877 
1878 		error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map,
1879 		    m0, segs, &nsegs, 0);
1880 		if (error != 0) {
1881 			device_printf(sc->sc_dev,
1882 			    "could not map mbuf (error %d)\n", error);
1883 			m_freem(m0);
1884 			return error;
1885 		}
1886 
1887 		/* packet header may have moved, reset our local pointer */
1888 		wh = mtod(m0, struct ieee80211_frame *);
1889 	}
1890 
1891 	if (ieee80211_radiotap_active_vap(vap)) {
1892 		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1893 
1894 		tap->wt_flags = 0;
1895 		tap->wt_rate = rate;
1896 		tap->wt_antenna = sc->tx_ant;
1897 
1898 		ieee80211_radiotap_tx(vap, m0);
1899 	}
1900 
1901 	data->m = m0;
1902 	data->ni = ni;
1903 
1904 	/* remember link conditions for rate adaptation algorithm */
1905 	if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) {
1906 		data->rix = ni->ni_txrate;
1907 		/* XXX probably need last rssi value and not avg */
1908 		data->rssi = ic->ic_node_getrssi(ni);
1909 	} else
1910 		data->rix = IEEE80211_FIXED_RATE_NONE;
1911 
1912 	if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1913 		flags |= RT2560_TX_ACK;
1914 
1915 		dur = ieee80211_ack_duration(ic->ic_rt,
1916 		    rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1917 		*(uint16_t *)wh->i_dur = htole16(dur);
1918 	}
1919 
1920 	rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1,
1921 	    segs->ds_addr);
1922 
1923 	bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1924 	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1925 	    BUS_DMASYNC_PREWRITE);
1926 
1927 	DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n",
1928 	    m0->m_pkthdr.len, sc->txq.cur_encrypt, rate);
1929 
1930 	/* kick encrypt */
1931 	sc->txq.queued++;
1932 	sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1933 	RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT);
1934 
1935 	return 0;
1936 }
1937 
1938 static void
1939 rt2560_start_locked(struct ifnet *ifp)
1940 {
1941 	struct rt2560_softc *sc = ifp->if_softc;
1942 	struct mbuf *m;
1943 	struct ieee80211_node *ni;
1944 
1945 	RAL_LOCK_ASSERT(sc);
1946 
1947 	for (;;) {
1948 		IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
1949 		if (m == NULL)
1950 			break;
1951 		if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) {
1952 			IFQ_DRV_PREPEND(&ifp->if_snd, m);
1953 			ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1954 			sc->sc_flags |= RT2560_F_DATA_OACTIVE;
1955 			break;
1956 		}
1957 		ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1958 		if (rt2560_tx_data(sc, m, ni) != 0) {
1959 			ieee80211_free_node(ni);
1960 			ifp->if_oerrors++;
1961 			break;
1962 		}
1963 
1964 		sc->sc_tx_timer = 5;
1965 	}
1966 }
1967 
1968 static void
1969 rt2560_start(struct ifnet *ifp)
1970 {
1971 	struct rt2560_softc *sc = ifp->if_softc;
1972 
1973 	RAL_LOCK(sc);
1974 	rt2560_start_locked(ifp);
1975 	RAL_UNLOCK(sc);
1976 }
1977 
1978 static void
1979 rt2560_watchdog(void *arg)
1980 {
1981 	struct rt2560_softc *sc = arg;
1982 	struct ifnet *ifp = sc->sc_ifp;
1983 
1984 	RAL_LOCK_ASSERT(sc);
1985 
1986 	KASSERT(ifp->if_drv_flags & IFF_DRV_RUNNING, ("not running"));
1987 
1988 	if (sc->sc_invalid)		/* card ejected */
1989 		return;
1990 
1991 	rt2560_encryption_intr(sc);
1992 	rt2560_tx_intr(sc);
1993 
1994 	if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) {
1995 		if_printf(ifp, "device timeout\n");
1996 		rt2560_init_locked(sc);
1997 		ifp->if_oerrors++;
1998 		/* NB: callout is reset in rt2560_init() */
1999 		return;
2000 	}
2001 	callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc);
2002 }
2003 
2004 static int
2005 rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
2006 {
2007 	struct rt2560_softc *sc = ifp->if_softc;
2008 	struct ieee80211com *ic = ifp->if_l2com;
2009 	struct ifreq *ifr = (struct ifreq *) data;
2010 	int error = 0, startall = 0;
2011 
2012 	switch (cmd) {
2013 	case SIOCSIFFLAGS:
2014 		RAL_LOCK(sc);
2015 		if (ifp->if_flags & IFF_UP) {
2016 			if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
2017 				rt2560_init_locked(sc);
2018 				startall = 1;
2019 			} else
2020 				rt2560_update_promisc(ifp);
2021 		} else {
2022 			if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2023 				rt2560_stop_locked(sc);
2024 		}
2025 		RAL_UNLOCK(sc);
2026 		if (startall)
2027 			ieee80211_start_all(ic);
2028 		break;
2029 	case SIOCGIFMEDIA:
2030 		error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2031 		break;
2032 	case SIOCGIFADDR:
2033 		error = ether_ioctl(ifp, cmd, data);
2034 		break;
2035 	default:
2036 		error = EINVAL;
2037 		break;
2038 	}
2039 	return error;
2040 }
2041 
2042 static void
2043 rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val)
2044 {
2045 	uint32_t tmp;
2046 	int ntries;
2047 
2048 	for (ntries = 0; ntries < 100; ntries++) {
2049 		if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
2050 			break;
2051 		DELAY(1);
2052 	}
2053 	if (ntries == 100) {
2054 		device_printf(sc->sc_dev, "could not write to BBP\n");
2055 		return;
2056 	}
2057 
2058 	tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val;
2059 	RAL_WRITE(sc, RT2560_BBPCSR, tmp);
2060 
2061 	DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val);
2062 }
2063 
2064 static uint8_t
2065 rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg)
2066 {
2067 	uint32_t val;
2068 	int ntries;
2069 
2070 	for (ntries = 0; ntries < 100; ntries++) {
2071 		if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
2072 			break;
2073 		DELAY(1);
2074 	}
2075 	if (ntries == 100) {
2076 		device_printf(sc->sc_dev, "could not read from BBP\n");
2077 		return 0;
2078 	}
2079 
2080 	val = RT2560_BBP_BUSY | reg << 8;
2081 	RAL_WRITE(sc, RT2560_BBPCSR, val);
2082 
2083 	for (ntries = 0; ntries < 100; ntries++) {
2084 		val = RAL_READ(sc, RT2560_BBPCSR);
2085 		if (!(val & RT2560_BBP_BUSY))
2086 			return val & 0xff;
2087 		DELAY(1);
2088 	}
2089 
2090 	device_printf(sc->sc_dev, "could not read from BBP\n");
2091 	return 0;
2092 }
2093 
2094 static void
2095 rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val)
2096 {
2097 	uint32_t tmp;
2098 	int ntries;
2099 
2100 	for (ntries = 0; ntries < 100; ntries++) {
2101 		if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY))
2102 			break;
2103 		DELAY(1);
2104 	}
2105 	if (ntries == 100) {
2106 		device_printf(sc->sc_dev, "could not write to RF\n");
2107 		return;
2108 	}
2109 
2110 	tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 |
2111 	    (reg & 0x3);
2112 	RAL_WRITE(sc, RT2560_RFCSR, tmp);
2113 
2114 	/* remember last written value in sc */
2115 	sc->rf_regs[reg] = val;
2116 
2117 	DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff);
2118 }
2119 
2120 static void
2121 rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c)
2122 {
2123 	struct ifnet *ifp = sc->sc_ifp;
2124 	struct ieee80211com *ic = ifp->if_l2com;
2125 	uint8_t power, tmp;
2126 	u_int i, chan;
2127 
2128 	chan = ieee80211_chan2ieee(ic, c);
2129 	KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan));
2130 
2131 	if (IEEE80211_IS_CHAN_2GHZ(c))
2132 		power = min(sc->txpow[chan - 1], 31);
2133 	else
2134 		power = 31;
2135 
2136 	/* adjust txpower using ifconfig settings */
2137 	power -= (100 - ic->ic_txpowlimit) / 8;
2138 
2139 	DPRINTFN(sc, 2, "setting channel to %u, txpower to %u\n", chan, power);
2140 
2141 	switch (sc->rf_rev) {
2142 	case RT2560_RF_2522:
2143 		rt2560_rf_write(sc, RAL_RF1, 0x00814);
2144 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]);
2145 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2146 		break;
2147 
2148 	case RT2560_RF_2523:
2149 		rt2560_rf_write(sc, RAL_RF1, 0x08804);
2150 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]);
2151 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044);
2152 		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2153 		break;
2154 
2155 	case RT2560_RF_2524:
2156 		rt2560_rf_write(sc, RAL_RF1, 0x0c808);
2157 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]);
2158 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2159 		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2160 		break;
2161 
2162 	case RT2560_RF_2525:
2163 		rt2560_rf_write(sc, RAL_RF1, 0x08808);
2164 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]);
2165 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2166 		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2167 
2168 		rt2560_rf_write(sc, RAL_RF1, 0x08808);
2169 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]);
2170 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2171 		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2172 		break;
2173 
2174 	case RT2560_RF_2525E:
2175 		rt2560_rf_write(sc, RAL_RF1, 0x08808);
2176 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]);
2177 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2178 		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282);
2179 		break;
2180 
2181 	case RT2560_RF_2526:
2182 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]);
2183 		rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2184 		rt2560_rf_write(sc, RAL_RF1, 0x08804);
2185 
2186 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]);
2187 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2188 		rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2189 		break;
2190 
2191 	/* dual-band RF */
2192 	case RT2560_RF_5222:
2193 		for (i = 0; rt2560_rf5222[i].chan != chan; i++);
2194 
2195 		rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1);
2196 		rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2);
2197 		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2198 		rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4);
2199 		break;
2200 	default:
2201  	        printf("unknown ral rev=%d\n", sc->rf_rev);
2202 	}
2203 
2204 	/* XXX */
2205 	if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
2206 		/* set Japan filter bit for channel 14 */
2207 		tmp = rt2560_bbp_read(sc, 70);
2208 
2209 		tmp &= ~RT2560_JAPAN_FILTER;
2210 		if (chan == 14)
2211 			tmp |= RT2560_JAPAN_FILTER;
2212 
2213 		rt2560_bbp_write(sc, 70, tmp);
2214 
2215 		/* clear CRC errors */
2216 		RAL_READ(sc, RT2560_CNT0);
2217 	}
2218 }
2219 
2220 static void
2221 rt2560_set_channel(struct ieee80211com *ic)
2222 {
2223 	struct ifnet *ifp = ic->ic_ifp;
2224 	struct rt2560_softc *sc = ifp->if_softc;
2225 
2226 	RAL_LOCK(sc);
2227 	rt2560_set_chan(sc, ic->ic_curchan);
2228 	RAL_UNLOCK(sc);
2229 
2230 }
2231 
2232 #if 0
2233 /*
2234  * Disable RF auto-tuning.
2235  */
2236 static void
2237 rt2560_disable_rf_tune(struct rt2560_softc *sc)
2238 {
2239 	uint32_t tmp;
2240 
2241 	if (sc->rf_rev != RT2560_RF_2523) {
2242 		tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE;
2243 		rt2560_rf_write(sc, RAL_RF1, tmp);
2244 	}
2245 
2246 	tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE;
2247 	rt2560_rf_write(sc, RAL_RF3, tmp);
2248 
2249 	DPRINTFN(sc, 2, "%s", "disabling RF autotune\n");
2250 }
2251 #endif
2252 
2253 /*
2254  * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF
2255  * synchronization.
2256  */
2257 static void
2258 rt2560_enable_tsf_sync(struct rt2560_softc *sc)
2259 {
2260 	struct ifnet *ifp = sc->sc_ifp;
2261 	struct ieee80211com *ic = ifp->if_l2com;
2262 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2263 	uint16_t logcwmin, preload;
2264 	uint32_t tmp;
2265 
2266 	/* first, disable TSF synchronization */
2267 	RAL_WRITE(sc, RT2560_CSR14, 0);
2268 
2269 	tmp = 16 * vap->iv_bss->ni_intval;
2270 	RAL_WRITE(sc, RT2560_CSR12, tmp);
2271 
2272 	RAL_WRITE(sc, RT2560_CSR13, 0);
2273 
2274 	logcwmin = 5;
2275 	preload = (vap->iv_opmode == IEEE80211_M_STA) ? 384 : 1024;
2276 	tmp = logcwmin << 16 | preload;
2277 	RAL_WRITE(sc, RT2560_BCNOCSR, tmp);
2278 
2279 	/* finally, enable TSF synchronization */
2280 	tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN;
2281 	if (ic->ic_opmode == IEEE80211_M_STA)
2282 		tmp |= RT2560_ENABLE_TSF_SYNC(1);
2283 	else
2284 		tmp |= RT2560_ENABLE_TSF_SYNC(2) |
2285 		       RT2560_ENABLE_BEACON_GENERATOR;
2286 	RAL_WRITE(sc, RT2560_CSR14, tmp);
2287 
2288 	DPRINTF(sc, "%s", "enabling TSF synchronization\n");
2289 }
2290 
2291 static void
2292 rt2560_enable_tsf(struct rt2560_softc *sc)
2293 {
2294 	RAL_WRITE(sc, RT2560_CSR14, 0);
2295 	RAL_WRITE(sc, RT2560_CSR14,
2296 	    RT2560_ENABLE_TSF_SYNC(2) | RT2560_ENABLE_TSF);
2297 }
2298 
2299 static void
2300 rt2560_update_plcp(struct rt2560_softc *sc)
2301 {
2302 	struct ifnet *ifp = sc->sc_ifp;
2303 	struct ieee80211com *ic = ifp->if_l2com;
2304 
2305 	/* no short preamble for 1Mbps */
2306 	RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400);
2307 
2308 	if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) {
2309 		/* values taken from the reference driver */
2310 		RAL_WRITE(sc, RT2560_PLCP2MCSR,   0x00380401);
2311 		RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402);
2312 		RAL_WRITE(sc, RT2560_PLCP11MCSR,  0x000b8403);
2313 	} else {
2314 		/* same values as above or'ed 0x8 */
2315 		RAL_WRITE(sc, RT2560_PLCP2MCSR,   0x00380409);
2316 		RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a);
2317 		RAL_WRITE(sc, RT2560_PLCP11MCSR,  0x000b840b);
2318 	}
2319 
2320 	DPRINTF(sc, "updating PLCP for %s preamble\n",
2321 	    (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long");
2322 }
2323 
2324 /*
2325  * This function can be called by ieee80211_set_shortslottime(). Refer to
2326  * IEEE Std 802.11-1999 pp. 85 to know how these values are computed.
2327  */
2328 static void
2329 rt2560_update_slot(struct ifnet *ifp)
2330 {
2331 	struct rt2560_softc *sc = ifp->if_softc;
2332 	struct ieee80211com *ic = ifp->if_l2com;
2333 	uint8_t slottime;
2334 	uint16_t tx_sifs, tx_pifs, tx_difs, eifs;
2335 	uint32_t tmp;
2336 
2337 #ifndef FORCE_SLOTTIME
2338 	slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20;
2339 #else
2340 	/*
2341 	 * Setting slot time according to "short slot time" capability
2342 	 * in beacon/probe_resp seems to cause problem to acknowledge
2343 	 * certain AP's data frames transimitted at CCK/DS rates: the
2344 	 * problematic AP keeps retransmitting data frames, probably
2345 	 * because MAC level acks are not received by hardware.
2346 	 * So we cheat a little bit here by claiming we are capable of
2347 	 * "short slot time" but setting hardware slot time to the normal
2348 	 * slot time.  ral(4) does not seem to have trouble to receive
2349 	 * frames transmitted using short slot time even if hardware
2350 	 * slot time is set to normal slot time.  If we didn't use this
2351 	 * trick, we would have to claim that short slot time is not
2352 	 * supported; this would give relative poor RX performance
2353 	 * (-1Mb~-2Mb lower) and the _whole_ BSS would stop using short
2354 	 * slot time.
2355 	 */
2356 	slottime = 20;
2357 #endif
2358 
2359 	/* update the MAC slot boundaries */
2360 	tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND;
2361 	tx_pifs = tx_sifs + slottime;
2362 	tx_difs = tx_sifs + 2 * slottime;
2363 	eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60;
2364 
2365 	tmp = RAL_READ(sc, RT2560_CSR11);
2366 	tmp = (tmp & ~0x1f00) | slottime << 8;
2367 	RAL_WRITE(sc, RT2560_CSR11, tmp);
2368 
2369 	tmp = tx_pifs << 16 | tx_sifs;
2370 	RAL_WRITE(sc, RT2560_CSR18, tmp);
2371 
2372 	tmp = eifs << 16 | tx_difs;
2373 	RAL_WRITE(sc, RT2560_CSR19, tmp);
2374 
2375 	DPRINTF(sc, "setting slottime to %uus\n", slottime);
2376 }
2377 
2378 static void
2379 rt2560_set_basicrates(struct rt2560_softc *sc)
2380 {
2381 	struct ifnet *ifp = sc->sc_ifp;
2382 	struct ieee80211com *ic = ifp->if_l2com;
2383 
2384 	/* update basic rate set */
2385 	if (ic->ic_curmode == IEEE80211_MODE_11B) {
2386 		/* 11b basic rates: 1, 2Mbps */
2387 		RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x3);
2388 	} else if (IEEE80211_IS_CHAN_5GHZ(ic->ic_curchan)) {
2389 		/* 11a basic rates: 6, 12, 24Mbps */
2390 		RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x150);
2391 	} else {
2392 		/* 11g basic rates: 1, 2, 5.5, 11, 6, 12, 24Mbps */
2393 		RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x15f);
2394 	}
2395 }
2396 
2397 static void
2398 rt2560_update_led(struct rt2560_softc *sc, int led1, int led2)
2399 {
2400 	uint32_t tmp;
2401 
2402 	/* set ON period to 70ms and OFF period to 30ms */
2403 	tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30;
2404 	RAL_WRITE(sc, RT2560_LEDCSR, tmp);
2405 }
2406 
2407 static void
2408 rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid)
2409 {
2410 	uint32_t tmp;
2411 
2412 	tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24;
2413 	RAL_WRITE(sc, RT2560_CSR5, tmp);
2414 
2415 	tmp = bssid[4] | bssid[5] << 8;
2416 	RAL_WRITE(sc, RT2560_CSR6, tmp);
2417 
2418 	DPRINTF(sc, "setting BSSID to %6D\n", bssid, ":");
2419 }
2420 
2421 static void
2422 rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2423 {
2424 	uint32_t tmp;
2425 
2426 	tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24;
2427 	RAL_WRITE(sc, RT2560_CSR3, tmp);
2428 
2429 	tmp = addr[4] | addr[5] << 8;
2430 	RAL_WRITE(sc, RT2560_CSR4, tmp);
2431 
2432 	DPRINTF(sc, "setting MAC address to %6D\n", addr, ":");
2433 }
2434 
2435 static void
2436 rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2437 {
2438 	uint32_t tmp;
2439 
2440 	tmp = RAL_READ(sc, RT2560_CSR3);
2441 	addr[0] = tmp & 0xff;
2442 	addr[1] = (tmp >>  8) & 0xff;
2443 	addr[2] = (tmp >> 16) & 0xff;
2444 	addr[3] = (tmp >> 24);
2445 
2446 	tmp = RAL_READ(sc, RT2560_CSR4);
2447 	addr[4] = tmp & 0xff;
2448 	addr[5] = (tmp >> 8) & 0xff;
2449 }
2450 
2451 static void
2452 rt2560_update_promisc(struct ifnet *ifp)
2453 {
2454 	struct rt2560_softc *sc = ifp->if_softc;
2455 	uint32_t tmp;
2456 
2457 	tmp = RAL_READ(sc, RT2560_RXCSR0);
2458 
2459 	tmp &= ~RT2560_DROP_NOT_TO_ME;
2460 	if (!(ifp->if_flags & IFF_PROMISC))
2461 		tmp |= RT2560_DROP_NOT_TO_ME;
2462 
2463 	RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2464 
2465 	DPRINTF(sc, "%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ?
2466 	    "entering" : "leaving");
2467 }
2468 
2469 static const char *
2470 rt2560_get_rf(int rev)
2471 {
2472 	switch (rev) {
2473 	case RT2560_RF_2522:	return "RT2522";
2474 	case RT2560_RF_2523:	return "RT2523";
2475 	case RT2560_RF_2524:	return "RT2524";
2476 	case RT2560_RF_2525:	return "RT2525";
2477 	case RT2560_RF_2525E:	return "RT2525e";
2478 	case RT2560_RF_2526:	return "RT2526";
2479 	case RT2560_RF_5222:	return "RT5222";
2480 	default:		return "unknown";
2481 	}
2482 }
2483 
2484 static void
2485 rt2560_read_config(struct rt2560_softc *sc)
2486 {
2487 	uint16_t val;
2488 	int i;
2489 
2490 	val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0);
2491 	sc->rf_rev =   (val >> 11) & 0x7;
2492 	sc->hw_radio = (val >> 10) & 0x1;
2493 	sc->led_mode = (val >> 6)  & 0x7;
2494 	sc->rx_ant =   (val >> 4)  & 0x3;
2495 	sc->tx_ant =   (val >> 2)  & 0x3;
2496 	sc->nb_ant =   val & 0x3;
2497 
2498 	/* read default values for BBP registers */
2499 	for (i = 0; i < 16; i++) {
2500 		val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i);
2501 		if (val == 0 || val == 0xffff)
2502 			continue;
2503 
2504 		sc->bbp_prom[i].reg = val >> 8;
2505 		sc->bbp_prom[i].val = val & 0xff;
2506 	}
2507 
2508 	/* read Tx power for all b/g channels */
2509 	for (i = 0; i < 14 / 2; i++) {
2510 		val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i);
2511 		sc->txpow[i * 2] = val & 0xff;
2512 		sc->txpow[i * 2 + 1] = val >> 8;
2513 	}
2514 	for (i = 0; i < 14; ++i) {
2515 		if (sc->txpow[i] > 31)
2516 			sc->txpow[i] = 24;
2517 	}
2518 
2519 	val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE);
2520 	if ((val & 0xff) == 0xff)
2521 		sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR;
2522 	else
2523 		sc->rssi_corr = val & 0xff;
2524 	DPRINTF(sc, "rssi correction %d, calibrate 0x%02x\n",
2525 		 sc->rssi_corr, val);
2526 }
2527 
2528 
2529 static void
2530 rt2560_scan_start(struct ieee80211com *ic)
2531 {
2532 	struct ifnet *ifp = ic->ic_ifp;
2533 	struct rt2560_softc *sc = ifp->if_softc;
2534 
2535 	/* abort TSF synchronization */
2536 	RAL_WRITE(sc, RT2560_CSR14, 0);
2537 	rt2560_set_bssid(sc, ifp->if_broadcastaddr);
2538 }
2539 
2540 static void
2541 rt2560_scan_end(struct ieee80211com *ic)
2542 {
2543 	struct ifnet *ifp = ic->ic_ifp;
2544 	struct rt2560_softc *sc = ifp->if_softc;
2545 	struct ieee80211vap *vap = ic->ic_scan->ss_vap;
2546 
2547 	rt2560_enable_tsf_sync(sc);
2548 	/* XXX keep local copy */
2549 	rt2560_set_bssid(sc, vap->iv_bss->ni_bssid);
2550 }
2551 
2552 static int
2553 rt2560_bbp_init(struct rt2560_softc *sc)
2554 {
2555 #define N(a)	(sizeof (a) / sizeof ((a)[0]))
2556 	int i, ntries;
2557 
2558 	/* wait for BBP to be ready */
2559 	for (ntries = 0; ntries < 100; ntries++) {
2560 		if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0)
2561 			break;
2562 		DELAY(1);
2563 	}
2564 	if (ntries == 100) {
2565 		device_printf(sc->sc_dev, "timeout waiting for BBP\n");
2566 		return EIO;
2567 	}
2568 
2569 	/* initialize BBP registers to default values */
2570 	for (i = 0; i < N(rt2560_def_bbp); i++) {
2571 		rt2560_bbp_write(sc, rt2560_def_bbp[i].reg,
2572 		    rt2560_def_bbp[i].val);
2573 	}
2574 
2575 	/* initialize BBP registers to values stored in EEPROM */
2576 	for (i = 0; i < 16; i++) {
2577 		if (sc->bbp_prom[i].reg == 0 && sc->bbp_prom[i].val == 0)
2578 			break;
2579 		rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val);
2580 	}
2581 	rt2560_bbp_write(sc, 17, 0x48);	/* XXX restore bbp17 */
2582 
2583 	return 0;
2584 #undef N
2585 }
2586 
2587 static void
2588 rt2560_set_txantenna(struct rt2560_softc *sc, int antenna)
2589 {
2590 	uint32_t tmp;
2591 	uint8_t tx;
2592 
2593 	tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK;
2594 	if (antenna == 1)
2595 		tx |= RT2560_BBP_ANTA;
2596 	else if (antenna == 2)
2597 		tx |= RT2560_BBP_ANTB;
2598 	else
2599 		tx |= RT2560_BBP_DIVERSITY;
2600 
2601 	/* need to force I/Q flip for RF 2525e, 2526 and 5222 */
2602 	if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 ||
2603 	    sc->rf_rev == RT2560_RF_5222)
2604 		tx |= RT2560_BBP_FLIPIQ;
2605 
2606 	rt2560_bbp_write(sc, RT2560_BBP_TX, tx);
2607 
2608 	/* update values for CCK and OFDM in BBPCSR1 */
2609 	tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007;
2610 	tmp |= (tx & 0x7) << 16 | (tx & 0x7);
2611 	RAL_WRITE(sc, RT2560_BBPCSR1, tmp);
2612 }
2613 
2614 static void
2615 rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna)
2616 {
2617 	uint8_t rx;
2618 
2619 	rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK;
2620 	if (antenna == 1)
2621 		rx |= RT2560_BBP_ANTA;
2622 	else if (antenna == 2)
2623 		rx |= RT2560_BBP_ANTB;
2624 	else
2625 		rx |= RT2560_BBP_DIVERSITY;
2626 
2627 	/* need to force no I/Q flip for RF 2525e and 2526 */
2628 	if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526)
2629 		rx &= ~RT2560_BBP_FLIPIQ;
2630 
2631 	rt2560_bbp_write(sc, RT2560_BBP_RX, rx);
2632 }
2633 
2634 static void
2635 rt2560_init_locked(struct rt2560_softc *sc)
2636 {
2637 #define N(a)	(sizeof (a) / sizeof ((a)[0]))
2638 	struct ifnet *ifp = sc->sc_ifp;
2639 	struct ieee80211com *ic = ifp->if_l2com;
2640 	uint32_t tmp;
2641 	int i;
2642 
2643 	RAL_LOCK_ASSERT(sc);
2644 
2645 	rt2560_stop_locked(sc);
2646 
2647 	/* setup tx rings */
2648 	tmp = RT2560_PRIO_RING_COUNT << 24 |
2649 	      RT2560_ATIM_RING_COUNT << 16 |
2650 	      RT2560_TX_RING_COUNT   <<  8 |
2651 	      RT2560_TX_DESC_SIZE;
2652 
2653 	/* rings must be initialized in this exact order */
2654 	RAL_WRITE(sc, RT2560_TXCSR2, tmp);
2655 	RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr);
2656 	RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr);
2657 	RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr);
2658 	RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr);
2659 
2660 	/* setup rx ring */
2661 	tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE;
2662 
2663 	RAL_WRITE(sc, RT2560_RXCSR1, tmp);
2664 	RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr);
2665 
2666 	/* initialize MAC registers to default values */
2667 	for (i = 0; i < N(rt2560_def_mac); i++)
2668 		RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val);
2669 
2670 	rt2560_set_macaddr(sc, IF_LLADDR(ifp));
2671 
2672 	/* set basic rate set (will be updated later) */
2673 	RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153);
2674 
2675 	rt2560_update_slot(ifp);
2676 	rt2560_update_plcp(sc);
2677 	rt2560_update_led(sc, 0, 0);
2678 
2679 	RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2680 	RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY);
2681 
2682 	if (rt2560_bbp_init(sc) != 0) {
2683 		rt2560_stop(sc);
2684 		RAL_UNLOCK(sc);
2685 		return;
2686 	}
2687 
2688 	rt2560_set_txantenna(sc, sc->tx_ant);
2689 	rt2560_set_rxantenna(sc, sc->rx_ant);
2690 
2691 	/* set default BSS channel */
2692 	rt2560_set_chan(sc, ic->ic_curchan);
2693 
2694 	/* kick Rx */
2695 	tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR;
2696 	if (ic->ic_opmode != IEEE80211_M_MONITOR) {
2697 		tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR;
2698 		if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
2699 		    ic->ic_opmode != IEEE80211_M_MBSS)
2700 			tmp |= RT2560_DROP_TODS;
2701 		if (!(ifp->if_flags & IFF_PROMISC))
2702 			tmp |= RT2560_DROP_NOT_TO_ME;
2703 	}
2704 	RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2705 
2706 	/* clear old FCS and Rx FIFO errors */
2707 	RAL_READ(sc, RT2560_CNT0);
2708 	RAL_READ(sc, RT2560_CNT4);
2709 
2710 	/* clear any pending interrupts */
2711 	RAL_WRITE(sc, RT2560_CSR7, 0xffffffff);
2712 
2713 	/* enable interrupts */
2714 	RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
2715 
2716 	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2717 	ifp->if_drv_flags |= IFF_DRV_RUNNING;
2718 
2719 	callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc);
2720 #undef N
2721 }
2722 
2723 static void
2724 rt2560_init(void *priv)
2725 {
2726 	struct rt2560_softc *sc = priv;
2727 	struct ifnet *ifp = sc->sc_ifp;
2728 	struct ieee80211com *ic = ifp->if_l2com;
2729 
2730 	RAL_LOCK(sc);
2731 	rt2560_init_locked(sc);
2732 	RAL_UNLOCK(sc);
2733 
2734 	if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2735 		ieee80211_start_all(ic);		/* start all vap's */
2736 }
2737 
2738 static void
2739 rt2560_stop_locked(struct rt2560_softc *sc)
2740 {
2741 	struct ifnet *ifp = sc->sc_ifp;
2742 	volatile int *flags = &sc->sc_flags;
2743 
2744 	RAL_LOCK_ASSERT(sc);
2745 
2746 	while (*flags & RT2560_F_INPUT_RUNNING)
2747 		msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10);
2748 
2749 	callout_stop(&sc->watchdog_ch);
2750 	sc->sc_tx_timer = 0;
2751 
2752 	if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
2753 		ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
2754 
2755 		/* abort Tx */
2756 		RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX);
2757 
2758 		/* disable Rx */
2759 		RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX);
2760 
2761 		/* reset ASIC (imply reset BBP) */
2762 		RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2763 		RAL_WRITE(sc, RT2560_CSR1, 0);
2764 
2765 		/* disable interrupts */
2766 		RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
2767 
2768 		/* reset Tx and Rx rings */
2769 		rt2560_reset_tx_ring(sc, &sc->txq);
2770 		rt2560_reset_tx_ring(sc, &sc->atimq);
2771 		rt2560_reset_tx_ring(sc, &sc->prioq);
2772 		rt2560_reset_tx_ring(sc, &sc->bcnq);
2773 		rt2560_reset_rx_ring(sc, &sc->rxq);
2774 	}
2775 	sc->sc_flags &= ~(RT2560_F_PRIO_OACTIVE | RT2560_F_DATA_OACTIVE);
2776 }
2777 
2778 void
2779 rt2560_stop(void *arg)
2780 {
2781 	struct rt2560_softc *sc = arg;
2782 
2783 	RAL_LOCK(sc);
2784 	rt2560_stop_locked(sc);
2785 	RAL_UNLOCK(sc);
2786 }
2787 
2788 static int
2789 rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2790 	const struct ieee80211_bpf_params *params)
2791 {
2792 	struct ieee80211com *ic = ni->ni_ic;
2793 	struct ifnet *ifp = ic->ic_ifp;
2794 	struct rt2560_softc *sc = ifp->if_softc;
2795 
2796 	RAL_LOCK(sc);
2797 
2798 	/* prevent management frames from being sent if we're not ready */
2799 	if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2800 		RAL_UNLOCK(sc);
2801 		m_freem(m);
2802 		ieee80211_free_node(ni);
2803 		return ENETDOWN;
2804 	}
2805 	if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) {
2806 		ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2807 		sc->sc_flags |= RT2560_F_PRIO_OACTIVE;
2808 		RAL_UNLOCK(sc);
2809 		m_freem(m);
2810 		ieee80211_free_node(ni);
2811 		return ENOBUFS;		/* XXX */
2812 	}
2813 
2814 	ifp->if_opackets++;
2815 
2816 	if (params == NULL) {
2817 		/*
2818 		 * Legacy path; interpret frame contents to decide
2819 		 * precisely how to send the frame.
2820 		 */
2821 		if (rt2560_tx_mgt(sc, m, ni) != 0)
2822 			goto bad;
2823 	} else {
2824 		/*
2825 		 * Caller supplied explicit parameters to use in
2826 		 * sending the frame.
2827 		 */
2828 		if (rt2560_tx_raw(sc, m, ni, params))
2829 			goto bad;
2830 	}
2831 	sc->sc_tx_timer = 5;
2832 
2833 	RAL_UNLOCK(sc);
2834 
2835 	return 0;
2836 bad:
2837 	ifp->if_oerrors++;
2838 	ieee80211_free_node(ni);
2839 	RAL_UNLOCK(sc);
2840 	return EIO;		/* XXX */
2841 }
2842