rt2560.c revision 260444
1/*	$FreeBSD: head/sys/dev/ral/rt2560.c 260444 2014-01-08 08:06:56Z kevlo $	*/
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: head/sys/dev/ral/rt2560.c 260444 2014-01-08 08:06:56Z kevlo $");
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_var.h>
49#include <net/if_arp.h>
50#include <net/ethernet.h>
51#include <net/if_dl.h>
52#include <net/if_media.h>
53#include <net/if_types.h>
54
55#include <net80211/ieee80211_var.h>
56#include <net80211/ieee80211_radiotap.h>
57#include <net80211/ieee80211_regdomain.h>
58#include <net80211/ieee80211_ratectl.h>
59
60#include <netinet/in.h>
61#include <netinet/in_systm.h>
62#include <netinet/in_var.h>
63#include <netinet/ip.h>
64#include <netinet/if_ether.h>
65
66#include <dev/ral/rt2560reg.h>
67#include <dev/ral/rt2560var.h>
68
69#define RT2560_RSSI(sc, rssi)					\
70	((rssi) > (RT2560_NOISE_FLOOR + (sc)->rssi_corr) ?	\
71	 ((rssi) - RT2560_NOISE_FLOOR - (sc)->rssi_corr) : 0)
72
73#define RAL_DEBUG
74#ifdef RAL_DEBUG
75#define DPRINTF(sc, fmt, ...) do {				\
76	if (sc->sc_debug > 0)					\
77		printf(fmt, __VA_ARGS__);			\
78} while (0)
79#define DPRINTFN(sc, n, fmt, ...) do {				\
80	if (sc->sc_debug >= (n))				\
81		printf(fmt, __VA_ARGS__);			\
82} while (0)
83#else
84#define DPRINTF(sc, fmt, ...)
85#define DPRINTFN(sc, n, fmt, ...)
86#endif
87
88static struct ieee80211vap *rt2560_vap_create(struct ieee80211com *,
89			    const char [IFNAMSIZ], int, enum ieee80211_opmode,
90			    int, const uint8_t [IEEE80211_ADDR_LEN],
91			    const uint8_t [IEEE80211_ADDR_LEN]);
92static void		rt2560_vap_delete(struct ieee80211vap *);
93static void		rt2560_dma_map_addr(void *, bus_dma_segment_t *, int,
94			    int);
95static int		rt2560_alloc_tx_ring(struct rt2560_softc *,
96			    struct rt2560_tx_ring *, int);
97static void		rt2560_reset_tx_ring(struct rt2560_softc *,
98			    struct rt2560_tx_ring *);
99static void		rt2560_free_tx_ring(struct rt2560_softc *,
100			    struct rt2560_tx_ring *);
101static int		rt2560_alloc_rx_ring(struct rt2560_softc *,
102			    struct rt2560_rx_ring *, int);
103static void		rt2560_reset_rx_ring(struct rt2560_softc *,
104			    struct rt2560_rx_ring *);
105static void		rt2560_free_rx_ring(struct rt2560_softc *,
106			    struct rt2560_rx_ring *);
107static int		rt2560_newstate(struct ieee80211vap *,
108			    enum ieee80211_state, int);
109static uint16_t		rt2560_eeprom_read(struct rt2560_softc *, uint8_t);
110static void		rt2560_encryption_intr(struct rt2560_softc *);
111static void		rt2560_tx_intr(struct rt2560_softc *);
112static void		rt2560_prio_intr(struct rt2560_softc *);
113static void		rt2560_decryption_intr(struct rt2560_softc *);
114static void		rt2560_rx_intr(struct rt2560_softc *);
115static void		rt2560_beacon_update(struct ieee80211vap *, int item);
116static void		rt2560_beacon_expire(struct rt2560_softc *);
117static void		rt2560_wakeup_expire(struct rt2560_softc *);
118static void		rt2560_scan_start(struct ieee80211com *);
119static void		rt2560_scan_end(struct ieee80211com *);
120static void		rt2560_set_channel(struct ieee80211com *);
121static void		rt2560_setup_tx_desc(struct rt2560_softc *,
122			    struct rt2560_tx_desc *, uint32_t, int, int, int,
123			    bus_addr_t);
124static int		rt2560_tx_bcn(struct rt2560_softc *, struct mbuf *,
125			    struct ieee80211_node *);
126static int		rt2560_tx_mgt(struct rt2560_softc *, struct mbuf *,
127			    struct ieee80211_node *);
128static int		rt2560_tx_data(struct rt2560_softc *, struct mbuf *,
129			    struct ieee80211_node *);
130static void		rt2560_start_locked(struct ifnet *);
131static void		rt2560_start(struct ifnet *);
132static void		rt2560_watchdog(void *);
133static int		rt2560_ioctl(struct ifnet *, u_long, caddr_t);
134static void		rt2560_bbp_write(struct rt2560_softc *, uint8_t,
135			    uint8_t);
136static uint8_t		rt2560_bbp_read(struct rt2560_softc *, uint8_t);
137static void		rt2560_rf_write(struct rt2560_softc *, uint8_t,
138			    uint32_t);
139static void		rt2560_set_chan(struct rt2560_softc *,
140			    struct ieee80211_channel *);
141#if 0
142static void		rt2560_disable_rf_tune(struct rt2560_softc *);
143#endif
144static void		rt2560_enable_tsf_sync(struct rt2560_softc *);
145static void		rt2560_enable_tsf(struct rt2560_softc *);
146static void		rt2560_update_plcp(struct rt2560_softc *);
147static void		rt2560_update_slot(struct ifnet *);
148static void		rt2560_set_basicrates(struct rt2560_softc *,
149			    const struct ieee80211_rateset *);
150static void		rt2560_update_led(struct rt2560_softc *, int, int);
151static void		rt2560_set_bssid(struct rt2560_softc *, const uint8_t *);
152static void		rt2560_set_macaddr(struct rt2560_softc *, uint8_t *);
153static void		rt2560_get_macaddr(struct rt2560_softc *, uint8_t *);
154static void		rt2560_update_promisc(struct ifnet *);
155static const char	*rt2560_get_rf(int);
156static void		rt2560_read_config(struct rt2560_softc *);
157static int		rt2560_bbp_init(struct rt2560_softc *);
158static void		rt2560_set_txantenna(struct rt2560_softc *, int);
159static void		rt2560_set_rxantenna(struct rt2560_softc *, int);
160static void		rt2560_init_locked(struct rt2560_softc *);
161static void		rt2560_init(void *);
162static void		rt2560_stop_locked(struct rt2560_softc *);
163static int		rt2560_raw_xmit(struct ieee80211_node *, struct mbuf *,
164				const struct ieee80211_bpf_params *);
165
166static const struct {
167	uint32_t	reg;
168	uint32_t	val;
169} rt2560_def_mac[] = {
170	RT2560_DEF_MAC
171};
172
173static const struct {
174	uint8_t	reg;
175	uint8_t	val;
176} rt2560_def_bbp[] = {
177	RT2560_DEF_BBP
178};
179
180static const uint32_t rt2560_rf2522_r2[]    = RT2560_RF2522_R2;
181static const uint32_t rt2560_rf2523_r2[]    = RT2560_RF2523_R2;
182static const uint32_t rt2560_rf2524_r2[]    = RT2560_RF2524_R2;
183static const uint32_t rt2560_rf2525_r2[]    = RT2560_RF2525_R2;
184static const uint32_t rt2560_rf2525_hi_r2[] = RT2560_RF2525_HI_R2;
185static const uint32_t rt2560_rf2525e_r2[]   = RT2560_RF2525E_R2;
186static const uint32_t rt2560_rf2526_r2[]    = RT2560_RF2526_R2;
187static const uint32_t rt2560_rf2526_hi_r2[] = RT2560_RF2526_HI_R2;
188
189static const struct {
190	uint8_t		chan;
191	uint32_t	r1, r2, r4;
192} rt2560_rf5222[] = {
193	RT2560_RF5222
194};
195
196int
197rt2560_attach(device_t dev, int id)
198{
199	struct rt2560_softc *sc = device_get_softc(dev);
200	struct ieee80211com *ic;
201	struct ifnet *ifp;
202	int error;
203	uint8_t bands;
204	uint8_t macaddr[IEEE80211_ADDR_LEN];
205
206	sc->sc_dev = dev;
207
208	mtx_init(&sc->sc_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
209	    MTX_DEF | MTX_RECURSE);
210
211	callout_init_mtx(&sc->watchdog_ch, &sc->sc_mtx, 0);
212
213	/* retrieve RT2560 rev. no */
214	sc->asic_rev = RAL_READ(sc, RT2560_CSR0);
215
216	/* retrieve RF rev. no and various other things from EEPROM */
217	rt2560_read_config(sc);
218
219	device_printf(dev, "MAC/BBP RT2560 (rev 0x%02x), RF %s\n",
220	    sc->asic_rev, rt2560_get_rf(sc->rf_rev));
221
222	/*
223	 * Allocate Tx and Rx rings.
224	 */
225	error = rt2560_alloc_tx_ring(sc, &sc->txq, RT2560_TX_RING_COUNT);
226	if (error != 0) {
227		device_printf(sc->sc_dev, "could not allocate Tx ring\n");
228		goto fail1;
229	}
230
231	error = rt2560_alloc_tx_ring(sc, &sc->atimq, RT2560_ATIM_RING_COUNT);
232	if (error != 0) {
233		device_printf(sc->sc_dev, "could not allocate ATIM ring\n");
234		goto fail2;
235	}
236
237	error = rt2560_alloc_tx_ring(sc, &sc->prioq, RT2560_PRIO_RING_COUNT);
238	if (error != 0) {
239		device_printf(sc->sc_dev, "could not allocate Prio ring\n");
240		goto fail3;
241	}
242
243	error = rt2560_alloc_tx_ring(sc, &sc->bcnq, RT2560_BEACON_RING_COUNT);
244	if (error != 0) {
245		device_printf(sc->sc_dev, "could not allocate Beacon ring\n");
246		goto fail4;
247	}
248
249	error = rt2560_alloc_rx_ring(sc, &sc->rxq, RT2560_RX_RING_COUNT);
250	if (error != 0) {
251		device_printf(sc->sc_dev, "could not allocate Rx ring\n");
252		goto fail5;
253	}
254
255	ifp = sc->sc_ifp = if_alloc(IFT_IEEE80211);
256	if (ifp == NULL) {
257		device_printf(sc->sc_dev, "can not if_alloc()\n");
258		goto fail6;
259	}
260	ic = ifp->if_l2com;
261
262	/* retrieve MAC address */
263	rt2560_get_macaddr(sc, macaddr);
264
265	ifp->if_softc = sc;
266	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
267	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
268	ifp->if_init = rt2560_init;
269	ifp->if_ioctl = rt2560_ioctl;
270	ifp->if_start = rt2560_start;
271	IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
272	ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
273	IFQ_SET_READY(&ifp->if_snd);
274
275	ic->ic_ifp = ifp;
276	ic->ic_opmode = IEEE80211_M_STA;
277	ic->ic_phytype = IEEE80211_T_OFDM; /* not only, but not used */
278
279	/* set device capabilities */
280	ic->ic_caps =
281		  IEEE80211_C_STA		/* station mode */
282		| IEEE80211_C_IBSS		/* ibss, nee adhoc, mode */
283		| IEEE80211_C_HOSTAP		/* hostap mode */
284		| IEEE80211_C_MONITOR		/* monitor mode */
285		| IEEE80211_C_AHDEMO		/* adhoc demo mode */
286		| IEEE80211_C_WDS		/* 4-address traffic works */
287		| IEEE80211_C_MBSS		/* mesh point link mode */
288		| IEEE80211_C_SHPREAMBLE	/* short preamble supported */
289		| IEEE80211_C_SHSLOT		/* short slot time supported */
290		| IEEE80211_C_WPA		/* capable of WPA1+WPA2 */
291		| IEEE80211_C_BGSCAN		/* capable of bg scanning */
292#ifdef notyet
293		| IEEE80211_C_TXFRAG		/* handle tx frags */
294#endif
295		;
296
297	bands = 0;
298	setbit(&bands, IEEE80211_MODE_11B);
299	setbit(&bands, IEEE80211_MODE_11G);
300	if (sc->rf_rev == RT2560_RF_5222)
301		setbit(&bands, IEEE80211_MODE_11A);
302	ieee80211_init_channels(ic, NULL, &bands);
303
304	ieee80211_ifattach(ic, macaddr);
305	ic->ic_raw_xmit = rt2560_raw_xmit;
306	ic->ic_updateslot = rt2560_update_slot;
307	ic->ic_update_promisc = rt2560_update_promisc;
308	ic->ic_scan_start = rt2560_scan_start;
309	ic->ic_scan_end = rt2560_scan_end;
310	ic->ic_set_channel = rt2560_set_channel;
311
312	ic->ic_vap_create = rt2560_vap_create;
313	ic->ic_vap_delete = rt2560_vap_delete;
314
315	ieee80211_radiotap_attach(ic,
316	    &sc->sc_txtap.wt_ihdr, sizeof(sc->sc_txtap),
317		RT2560_TX_RADIOTAP_PRESENT,
318	    &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
319		RT2560_RX_RADIOTAP_PRESENT);
320
321	/*
322	 * Add a few sysctl knobs.
323	 */
324#ifdef RAL_DEBUG
325	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
326	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
327	    "debug", CTLFLAG_RW, &sc->sc_debug, 0, "debug msgs");
328#endif
329	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
330	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
331	    "txantenna", CTLFLAG_RW, &sc->tx_ant, 0, "tx antenna (0=auto)");
332
333	SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
334	    SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
335	    "rxantenna", CTLFLAG_RW, &sc->rx_ant, 0, "rx antenna (0=auto)");
336
337	if (bootverbose)
338		ieee80211_announce(ic);
339
340	return 0;
341
342fail6:	rt2560_free_rx_ring(sc, &sc->rxq);
343fail5:	rt2560_free_tx_ring(sc, &sc->bcnq);
344fail4:	rt2560_free_tx_ring(sc, &sc->prioq);
345fail3:	rt2560_free_tx_ring(sc, &sc->atimq);
346fail2:	rt2560_free_tx_ring(sc, &sc->txq);
347fail1:	mtx_destroy(&sc->sc_mtx);
348
349	return ENXIO;
350}
351
352int
353rt2560_detach(void *xsc)
354{
355	struct rt2560_softc *sc = xsc;
356	struct ifnet *ifp = sc->sc_ifp;
357	struct ieee80211com *ic = ifp->if_l2com;
358
359	rt2560_stop(sc);
360
361	ieee80211_ifdetach(ic);
362
363	rt2560_free_tx_ring(sc, &sc->txq);
364	rt2560_free_tx_ring(sc, &sc->atimq);
365	rt2560_free_tx_ring(sc, &sc->prioq);
366	rt2560_free_tx_ring(sc, &sc->bcnq);
367	rt2560_free_rx_ring(sc, &sc->rxq);
368
369	if_free(ifp);
370
371	mtx_destroy(&sc->sc_mtx);
372
373	return 0;
374}
375
376static struct ieee80211vap *
377rt2560_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
378    enum ieee80211_opmode opmode, int flags,
379    const uint8_t bssid[IEEE80211_ADDR_LEN],
380    const uint8_t mac[IEEE80211_ADDR_LEN])
381{
382	struct ifnet *ifp = ic->ic_ifp;
383	struct rt2560_vap *rvp;
384	struct ieee80211vap *vap;
385
386	switch (opmode) {
387	case IEEE80211_M_STA:
388	case IEEE80211_M_IBSS:
389	case IEEE80211_M_AHDEMO:
390	case IEEE80211_M_MONITOR:
391	case IEEE80211_M_HOSTAP:
392	case IEEE80211_M_MBSS:
393		/* XXXRP: TBD */
394		if (!TAILQ_EMPTY(&ic->ic_vaps)) {
395			if_printf(ifp, "only 1 vap supported\n");
396			return NULL;
397		}
398		if (opmode == IEEE80211_M_STA)
399			flags |= IEEE80211_CLONE_NOBEACONS;
400		break;
401	case IEEE80211_M_WDS:
402		if (TAILQ_EMPTY(&ic->ic_vaps) ||
403		    ic->ic_opmode != IEEE80211_M_HOSTAP) {
404			if_printf(ifp, "wds only supported in ap mode\n");
405			return NULL;
406		}
407		/*
408		 * Silently remove any request for a unique
409		 * bssid; WDS vap's always share the local
410		 * mac address.
411		 */
412		flags &= ~IEEE80211_CLONE_BSSID;
413		break;
414	default:
415		if_printf(ifp, "unknown opmode %d\n", opmode);
416		return NULL;
417	}
418	rvp = (struct rt2560_vap *) malloc(sizeof(struct rt2560_vap),
419	    M_80211_VAP, M_NOWAIT | M_ZERO);
420	if (rvp == NULL)
421		return NULL;
422	vap = &rvp->ral_vap;
423	ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
424
425	/* override state transition machine */
426	rvp->ral_newstate = vap->iv_newstate;
427	vap->iv_newstate = rt2560_newstate;
428	vap->iv_update_beacon = rt2560_beacon_update;
429
430	ieee80211_ratectl_init(vap);
431	/* complete setup */
432	ieee80211_vap_attach(vap, ieee80211_media_change, ieee80211_media_status);
433	if (TAILQ_FIRST(&ic->ic_vaps) == vap)
434		ic->ic_opmode = opmode;
435	return vap;
436}
437
438static void
439rt2560_vap_delete(struct ieee80211vap *vap)
440{
441	struct rt2560_vap *rvp = RT2560_VAP(vap);
442
443	ieee80211_ratectl_deinit(vap);
444	ieee80211_vap_detach(vap);
445	free(rvp, M_80211_VAP);
446}
447
448void
449rt2560_resume(void *xsc)
450{
451	struct rt2560_softc *sc = xsc;
452	struct ifnet *ifp = sc->sc_ifp;
453
454	if (ifp->if_flags & IFF_UP)
455		rt2560_init(sc);
456}
457
458static void
459rt2560_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
460{
461	if (error != 0)
462		return;
463
464	KASSERT(nseg == 1, ("too many DMA segments, %d should be 1", nseg));
465
466	*(bus_addr_t *)arg = segs[0].ds_addr;
467}
468
469static int
470rt2560_alloc_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring,
471    int count)
472{
473	int i, error;
474
475	ring->count = count;
476	ring->queued = 0;
477	ring->cur = ring->next = 0;
478	ring->cur_encrypt = ring->next_encrypt = 0;
479
480	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
481	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
482	    count * RT2560_TX_DESC_SIZE, 1, count * RT2560_TX_DESC_SIZE,
483	    0, NULL, NULL, &ring->desc_dmat);
484	if (error != 0) {
485		device_printf(sc->sc_dev, "could not create desc DMA tag\n");
486		goto fail;
487	}
488
489	error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
490	    BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
491	if (error != 0) {
492		device_printf(sc->sc_dev, "could not allocate DMA memory\n");
493		goto fail;
494	}
495
496	error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
497	    count * RT2560_TX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
498	    0);
499	if (error != 0) {
500		device_printf(sc->sc_dev, "could not load desc DMA map\n");
501		goto fail;
502	}
503
504	ring->data = malloc(count * sizeof (struct rt2560_tx_data), M_DEVBUF,
505	    M_NOWAIT | M_ZERO);
506	if (ring->data == NULL) {
507		device_printf(sc->sc_dev, "could not allocate soft data\n");
508		error = ENOMEM;
509		goto fail;
510	}
511
512	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
513	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
514	    MCLBYTES, RT2560_MAX_SCATTER, MCLBYTES, 0, NULL, NULL,
515	    &ring->data_dmat);
516	if (error != 0) {
517		device_printf(sc->sc_dev, "could not create data DMA tag\n");
518		goto fail;
519	}
520
521	for (i = 0; i < count; i++) {
522		error = bus_dmamap_create(ring->data_dmat, 0,
523		    &ring->data[i].map);
524		if (error != 0) {
525			device_printf(sc->sc_dev, "could not create DMA map\n");
526			goto fail;
527		}
528	}
529
530	return 0;
531
532fail:	rt2560_free_tx_ring(sc, ring);
533	return error;
534}
535
536static void
537rt2560_reset_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
538{
539	struct rt2560_tx_desc *desc;
540	struct rt2560_tx_data *data;
541	int i;
542
543	for (i = 0; i < ring->count; i++) {
544		desc = &ring->desc[i];
545		data = &ring->data[i];
546
547		if (data->m != NULL) {
548			bus_dmamap_sync(ring->data_dmat, data->map,
549			    BUS_DMASYNC_POSTWRITE);
550			bus_dmamap_unload(ring->data_dmat, data->map);
551			m_freem(data->m);
552			data->m = NULL;
553		}
554
555		if (data->ni != NULL) {
556			ieee80211_free_node(data->ni);
557			data->ni = NULL;
558		}
559
560		desc->flags = 0;
561	}
562
563	bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
564
565	ring->queued = 0;
566	ring->cur = ring->next = 0;
567	ring->cur_encrypt = ring->next_encrypt = 0;
568}
569
570static void
571rt2560_free_tx_ring(struct rt2560_softc *sc, struct rt2560_tx_ring *ring)
572{
573	struct rt2560_tx_data *data;
574	int i;
575
576	if (ring->desc != NULL) {
577		bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
578		    BUS_DMASYNC_POSTWRITE);
579		bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
580		bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
581	}
582
583	if (ring->desc_dmat != NULL)
584		bus_dma_tag_destroy(ring->desc_dmat);
585
586	if (ring->data != NULL) {
587		for (i = 0; i < ring->count; i++) {
588			data = &ring->data[i];
589
590			if (data->m != NULL) {
591				bus_dmamap_sync(ring->data_dmat, data->map,
592				    BUS_DMASYNC_POSTWRITE);
593				bus_dmamap_unload(ring->data_dmat, data->map);
594				m_freem(data->m);
595			}
596
597			if (data->ni != NULL)
598				ieee80211_free_node(data->ni);
599
600			if (data->map != NULL)
601				bus_dmamap_destroy(ring->data_dmat, data->map);
602		}
603
604		free(ring->data, M_DEVBUF);
605	}
606
607	if (ring->data_dmat != NULL)
608		bus_dma_tag_destroy(ring->data_dmat);
609}
610
611static int
612rt2560_alloc_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring,
613    int count)
614{
615	struct rt2560_rx_desc *desc;
616	struct rt2560_rx_data *data;
617	bus_addr_t physaddr;
618	int i, error;
619
620	ring->count = count;
621	ring->cur = ring->next = 0;
622	ring->cur_decrypt = 0;
623
624	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 4, 0,
625	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
626	    count * RT2560_RX_DESC_SIZE, 1, count * RT2560_RX_DESC_SIZE,
627	    0, NULL, NULL, &ring->desc_dmat);
628	if (error != 0) {
629		device_printf(sc->sc_dev, "could not create desc DMA tag\n");
630		goto fail;
631	}
632
633	error = bus_dmamem_alloc(ring->desc_dmat, (void **)&ring->desc,
634	    BUS_DMA_NOWAIT | BUS_DMA_ZERO, &ring->desc_map);
635	if (error != 0) {
636		device_printf(sc->sc_dev, "could not allocate DMA memory\n");
637		goto fail;
638	}
639
640	error = bus_dmamap_load(ring->desc_dmat, ring->desc_map, ring->desc,
641	    count * RT2560_RX_DESC_SIZE, rt2560_dma_map_addr, &ring->physaddr,
642	    0);
643	if (error != 0) {
644		device_printf(sc->sc_dev, "could not load desc DMA map\n");
645		goto fail;
646	}
647
648	ring->data = malloc(count * sizeof (struct rt2560_rx_data), M_DEVBUF,
649	    M_NOWAIT | M_ZERO);
650	if (ring->data == NULL) {
651		device_printf(sc->sc_dev, "could not allocate soft data\n");
652		error = ENOMEM;
653		goto fail;
654	}
655
656	/*
657	 * Pre-allocate Rx buffers and populate Rx ring.
658	 */
659	error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
660	    BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
661	    1, MCLBYTES, 0, NULL, NULL, &ring->data_dmat);
662	if (error != 0) {
663		device_printf(sc->sc_dev, "could not create data DMA tag\n");
664		goto fail;
665	}
666
667	for (i = 0; i < count; i++) {
668		desc = &sc->rxq.desc[i];
669		data = &sc->rxq.data[i];
670
671		error = bus_dmamap_create(ring->data_dmat, 0, &data->map);
672		if (error != 0) {
673			device_printf(sc->sc_dev, "could not create DMA map\n");
674			goto fail;
675		}
676
677		data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
678		if (data->m == NULL) {
679			device_printf(sc->sc_dev,
680			    "could not allocate rx mbuf\n");
681			error = ENOMEM;
682			goto fail;
683		}
684
685		error = bus_dmamap_load(ring->data_dmat, data->map,
686		    mtod(data->m, void *), MCLBYTES, rt2560_dma_map_addr,
687		    &physaddr, 0);
688		if (error != 0) {
689			device_printf(sc->sc_dev,
690			    "could not load rx buf DMA map");
691			goto fail;
692		}
693
694		desc->flags = htole32(RT2560_RX_BUSY);
695		desc->physaddr = htole32(physaddr);
696	}
697
698	bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
699
700	return 0;
701
702fail:	rt2560_free_rx_ring(sc, ring);
703	return error;
704}
705
706static void
707rt2560_reset_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
708{
709	int i;
710
711	for (i = 0; i < ring->count; i++) {
712		ring->desc[i].flags = htole32(RT2560_RX_BUSY);
713		ring->data[i].drop = 0;
714	}
715
716	bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_PREWRITE);
717
718	ring->cur = ring->next = 0;
719	ring->cur_decrypt = 0;
720}
721
722static void
723rt2560_free_rx_ring(struct rt2560_softc *sc, struct rt2560_rx_ring *ring)
724{
725	struct rt2560_rx_data *data;
726	int i;
727
728	if (ring->desc != NULL) {
729		bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
730		    BUS_DMASYNC_POSTWRITE);
731		bus_dmamap_unload(ring->desc_dmat, ring->desc_map);
732		bus_dmamem_free(ring->desc_dmat, ring->desc, ring->desc_map);
733	}
734
735	if (ring->desc_dmat != NULL)
736		bus_dma_tag_destroy(ring->desc_dmat);
737
738	if (ring->data != NULL) {
739		for (i = 0; i < ring->count; i++) {
740			data = &ring->data[i];
741
742			if (data->m != NULL) {
743				bus_dmamap_sync(ring->data_dmat, data->map,
744				    BUS_DMASYNC_POSTREAD);
745				bus_dmamap_unload(ring->data_dmat, data->map);
746				m_freem(data->m);
747			}
748
749			if (data->map != NULL)
750				bus_dmamap_destroy(ring->data_dmat, data->map);
751		}
752
753		free(ring->data, M_DEVBUF);
754	}
755
756	if (ring->data_dmat != NULL)
757		bus_dma_tag_destroy(ring->data_dmat);
758}
759
760static int
761rt2560_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
762{
763	struct rt2560_vap *rvp = RT2560_VAP(vap);
764	struct ifnet *ifp = vap->iv_ic->ic_ifp;
765	struct rt2560_softc *sc = ifp->if_softc;
766	int error;
767
768	if (nstate == IEEE80211_S_INIT && vap->iv_state == IEEE80211_S_RUN) {
769		/* abort TSF synchronization */
770		RAL_WRITE(sc, RT2560_CSR14, 0);
771
772		/* turn association led off */
773		rt2560_update_led(sc, 0, 0);
774	}
775
776	error = rvp->ral_newstate(vap, nstate, arg);
777
778	if (error == 0 && nstate == IEEE80211_S_RUN) {
779		struct ieee80211_node *ni = vap->iv_bss;
780		struct mbuf *m;
781
782		if (vap->iv_opmode != IEEE80211_M_MONITOR) {
783			rt2560_update_plcp(sc);
784			rt2560_set_basicrates(sc, &ni->ni_rates);
785			rt2560_set_bssid(sc, ni->ni_bssid);
786		}
787
788		if (vap->iv_opmode == IEEE80211_M_HOSTAP ||
789		    vap->iv_opmode == IEEE80211_M_IBSS ||
790		    vap->iv_opmode == IEEE80211_M_MBSS) {
791			m = ieee80211_beacon_alloc(ni, &rvp->ral_bo);
792			if (m == NULL) {
793				if_printf(ifp, "could not allocate beacon\n");
794				return ENOBUFS;
795			}
796			ieee80211_ref_node(ni);
797			error = rt2560_tx_bcn(sc, m, ni);
798			if (error != 0)
799				return error;
800		}
801
802		/* turn assocation led on */
803		rt2560_update_led(sc, 1, 0);
804
805		if (vap->iv_opmode != IEEE80211_M_MONITOR)
806			rt2560_enable_tsf_sync(sc);
807		else
808			rt2560_enable_tsf(sc);
809	}
810	return error;
811}
812
813/*
814 * Read 16 bits at address 'addr' from the serial EEPROM (either 93C46 or
815 * 93C66).
816 */
817static uint16_t
818rt2560_eeprom_read(struct rt2560_softc *sc, uint8_t addr)
819{
820	uint32_t tmp;
821	uint16_t val;
822	int n;
823
824	/* clock C once before the first command */
825	RT2560_EEPROM_CTL(sc, 0);
826
827	RT2560_EEPROM_CTL(sc, RT2560_S);
828	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
829	RT2560_EEPROM_CTL(sc, RT2560_S);
830
831	/* write start bit (1) */
832	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
833	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
834
835	/* write READ opcode (10) */
836	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D);
837	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_D | RT2560_C);
838	RT2560_EEPROM_CTL(sc, RT2560_S);
839	RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
840
841	/* write address (A5-A0 or A7-A0) */
842	n = (RAL_READ(sc, RT2560_CSR21) & RT2560_93C46) ? 5 : 7;
843	for (; n >= 0; n--) {
844		RT2560_EEPROM_CTL(sc, RT2560_S |
845		    (((addr >> n) & 1) << RT2560_SHIFT_D));
846		RT2560_EEPROM_CTL(sc, RT2560_S |
847		    (((addr >> n) & 1) << RT2560_SHIFT_D) | RT2560_C);
848	}
849
850	RT2560_EEPROM_CTL(sc, RT2560_S);
851
852	/* read data Q15-Q0 */
853	val = 0;
854	for (n = 15; n >= 0; n--) {
855		RT2560_EEPROM_CTL(sc, RT2560_S | RT2560_C);
856		tmp = RAL_READ(sc, RT2560_CSR21);
857		val |= ((tmp & RT2560_Q) >> RT2560_SHIFT_Q) << n;
858		RT2560_EEPROM_CTL(sc, RT2560_S);
859	}
860
861	RT2560_EEPROM_CTL(sc, 0);
862
863	/* clear Chip Select and clock C */
864	RT2560_EEPROM_CTL(sc, RT2560_S);
865	RT2560_EEPROM_CTL(sc, 0);
866	RT2560_EEPROM_CTL(sc, RT2560_C);
867
868	return val;
869}
870
871/*
872 * Some frames were processed by the hardware cipher engine and are ready for
873 * transmission.
874 */
875static void
876rt2560_encryption_intr(struct rt2560_softc *sc)
877{
878	struct rt2560_tx_desc *desc;
879	int hw;
880
881	/* retrieve last descriptor index processed by cipher engine */
882	hw = RAL_READ(sc, RT2560_SECCSR1) - sc->txq.physaddr;
883	hw /= RT2560_TX_DESC_SIZE;
884
885	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
886	    BUS_DMASYNC_POSTREAD);
887
888	while (sc->txq.next_encrypt != hw) {
889		if (sc->txq.next_encrypt == sc->txq.cur_encrypt) {
890			printf("hw encrypt %d, cur_encrypt %d\n", hw,
891			    sc->txq.cur_encrypt);
892			break;
893		}
894
895		desc = &sc->txq.desc[sc->txq.next_encrypt];
896
897		if ((le32toh(desc->flags) & RT2560_TX_BUSY) ||
898		    (le32toh(desc->flags) & RT2560_TX_CIPHER_BUSY))
899			break;
900
901		/* for TKIP, swap eiv field to fix a bug in ASIC */
902		if ((le32toh(desc->flags) & RT2560_TX_CIPHER_MASK) ==
903		    RT2560_TX_CIPHER_TKIP)
904			desc->eiv = bswap32(desc->eiv);
905
906		/* mark the frame ready for transmission */
907		desc->flags |= htole32(RT2560_TX_VALID);
908		desc->flags |= htole32(RT2560_TX_BUSY);
909
910		DPRINTFN(sc, 15, "encryption done idx=%u\n",
911		    sc->txq.next_encrypt);
912
913		sc->txq.next_encrypt =
914		    (sc->txq.next_encrypt + 1) % RT2560_TX_RING_COUNT;
915	}
916
917	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
918	    BUS_DMASYNC_PREWRITE);
919
920	/* kick Tx */
921	RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_TX);
922}
923
924static void
925rt2560_tx_intr(struct rt2560_softc *sc)
926{
927	struct ifnet *ifp = sc->sc_ifp;
928	struct rt2560_tx_desc *desc;
929	struct rt2560_tx_data *data;
930	struct mbuf *m;
931	uint32_t flags;
932	int retrycnt;
933	struct ieee80211vap *vap;
934	struct ieee80211_node *ni;
935
936	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
937	    BUS_DMASYNC_POSTREAD);
938
939	for (;;) {
940		desc = &sc->txq.desc[sc->txq.next];
941		data = &sc->txq.data[sc->txq.next];
942
943		flags = le32toh(desc->flags);
944		if ((flags & RT2560_TX_BUSY) ||
945		    (flags & RT2560_TX_CIPHER_BUSY) ||
946		    !(flags & RT2560_TX_VALID))
947			break;
948
949		m = data->m;
950		ni = data->ni;
951		vap = ni->ni_vap;
952
953		switch (flags & RT2560_TX_RESULT_MASK) {
954		case RT2560_TX_SUCCESS:
955			retrycnt = 0;
956
957			DPRINTFN(sc, 10, "%s\n", "data frame sent successfully");
958			if (data->rix != IEEE80211_FIXED_RATE_NONE)
959				ieee80211_ratectl_tx_complete(vap, ni,
960				    IEEE80211_RATECTL_TX_SUCCESS,
961				    &retrycnt, NULL);
962			ifp->if_opackets++;
963			break;
964
965		case RT2560_TX_SUCCESS_RETRY:
966			retrycnt = RT2560_TX_RETRYCNT(flags);
967
968			DPRINTFN(sc, 9, "data frame sent after %u retries\n",
969			    retrycnt);
970			if (data->rix != IEEE80211_FIXED_RATE_NONE)
971				ieee80211_ratectl_tx_complete(vap, ni,
972				    IEEE80211_RATECTL_TX_SUCCESS,
973				    &retrycnt, NULL);
974			ifp->if_opackets++;
975			break;
976
977		case RT2560_TX_FAIL_RETRY:
978			retrycnt = RT2560_TX_RETRYCNT(flags);
979
980			DPRINTFN(sc, 9, "data frame failed after %d retries\n",
981			    retrycnt);
982			if (data->rix != IEEE80211_FIXED_RATE_NONE)
983				ieee80211_ratectl_tx_complete(vap, ni,
984				    IEEE80211_RATECTL_TX_FAILURE,
985				    &retrycnt, NULL);
986			ifp->if_oerrors++;
987			break;
988
989		case RT2560_TX_FAIL_INVALID:
990		case RT2560_TX_FAIL_OTHER:
991		default:
992			device_printf(sc->sc_dev, "sending data frame failed "
993			    "0x%08x\n", flags);
994			ifp->if_oerrors++;
995		}
996
997		bus_dmamap_sync(sc->txq.data_dmat, data->map,
998		    BUS_DMASYNC_POSTWRITE);
999		bus_dmamap_unload(sc->txq.data_dmat, data->map);
1000		m_freem(m);
1001		data->m = NULL;
1002		ieee80211_free_node(data->ni);
1003		data->ni = NULL;
1004
1005		/* descriptor is no longer valid */
1006		desc->flags &= ~htole32(RT2560_TX_VALID);
1007
1008		DPRINTFN(sc, 15, "tx done idx=%u\n", sc->txq.next);
1009
1010		sc->txq.queued--;
1011		sc->txq.next = (sc->txq.next + 1) % RT2560_TX_RING_COUNT;
1012	}
1013
1014	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1015	    BUS_DMASYNC_PREWRITE);
1016
1017	if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1018		sc->sc_tx_timer = 0;
1019
1020	if (sc->txq.queued < RT2560_TX_RING_COUNT - 1) {
1021		sc->sc_flags &= ~RT2560_F_DATA_OACTIVE;
1022		if ((sc->sc_flags &
1023		     (RT2560_F_DATA_OACTIVE | RT2560_F_PRIO_OACTIVE)) == 0)
1024			ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1025		rt2560_start_locked(ifp);
1026	}
1027}
1028
1029static void
1030rt2560_prio_intr(struct rt2560_softc *sc)
1031{
1032	struct ifnet *ifp = sc->sc_ifp;
1033	struct rt2560_tx_desc *desc;
1034	struct rt2560_tx_data *data;
1035	struct ieee80211_node *ni;
1036	struct mbuf *m;
1037	int flags;
1038
1039	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1040	    BUS_DMASYNC_POSTREAD);
1041
1042	for (;;) {
1043		desc = &sc->prioq.desc[sc->prioq.next];
1044		data = &sc->prioq.data[sc->prioq.next];
1045
1046		flags = le32toh(desc->flags);
1047		if ((flags & RT2560_TX_BUSY) || (flags & RT2560_TX_VALID) == 0)
1048			break;
1049
1050		switch (flags & RT2560_TX_RESULT_MASK) {
1051		case RT2560_TX_SUCCESS:
1052			DPRINTFN(sc, 10, "%s\n", "mgt frame sent successfully");
1053			break;
1054
1055		case RT2560_TX_SUCCESS_RETRY:
1056			DPRINTFN(sc, 9, "mgt frame sent after %u retries\n",
1057			    (flags >> 5) & 0x7);
1058			break;
1059
1060		case RT2560_TX_FAIL_RETRY:
1061			DPRINTFN(sc, 9, "%s\n",
1062			    "sending mgt frame failed (too much retries)");
1063			break;
1064
1065		case RT2560_TX_FAIL_INVALID:
1066		case RT2560_TX_FAIL_OTHER:
1067		default:
1068			device_printf(sc->sc_dev, "sending mgt frame failed "
1069			    "0x%08x\n", flags);
1070			break;
1071		}
1072
1073		bus_dmamap_sync(sc->prioq.data_dmat, data->map,
1074		    BUS_DMASYNC_POSTWRITE);
1075		bus_dmamap_unload(sc->prioq.data_dmat, data->map);
1076
1077		m = data->m;
1078		data->m = NULL;
1079		ni = data->ni;
1080		data->ni = NULL;
1081
1082		/* descriptor is no longer valid */
1083		desc->flags &= ~htole32(RT2560_TX_VALID);
1084
1085		DPRINTFN(sc, 15, "prio done idx=%u\n", sc->prioq.next);
1086
1087		sc->prioq.queued--;
1088		sc->prioq.next = (sc->prioq.next + 1) % RT2560_PRIO_RING_COUNT;
1089
1090		if (m->m_flags & M_TXCB)
1091			ieee80211_process_callback(ni, m,
1092				(flags & RT2560_TX_RESULT_MASK) &~
1093				(RT2560_TX_SUCCESS | RT2560_TX_SUCCESS_RETRY));
1094		m_freem(m);
1095		ieee80211_free_node(ni);
1096	}
1097
1098	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1099	    BUS_DMASYNC_PREWRITE);
1100
1101	if (sc->prioq.queued == 0 && sc->txq.queued == 0)
1102		sc->sc_tx_timer = 0;
1103
1104	if (sc->prioq.queued < RT2560_PRIO_RING_COUNT) {
1105		sc->sc_flags &= ~RT2560_F_PRIO_OACTIVE;
1106		if ((sc->sc_flags &
1107		     (RT2560_F_DATA_OACTIVE | RT2560_F_PRIO_OACTIVE)) == 0)
1108			ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
1109		rt2560_start_locked(ifp);
1110	}
1111}
1112
1113/*
1114 * Some frames were processed by the hardware cipher engine and are ready for
1115 * handoff to the IEEE802.11 layer.
1116 */
1117static void
1118rt2560_decryption_intr(struct rt2560_softc *sc)
1119{
1120	struct ifnet *ifp = sc->sc_ifp;
1121	struct ieee80211com *ic = ifp->if_l2com;
1122	struct rt2560_rx_desc *desc;
1123	struct rt2560_rx_data *data;
1124	bus_addr_t physaddr;
1125	struct ieee80211_frame *wh;
1126	struct ieee80211_node *ni;
1127	struct mbuf *mnew, *m;
1128	int hw, error;
1129	int8_t rssi, nf;
1130
1131	/* retrieve last decriptor index processed by cipher engine */
1132	hw = RAL_READ(sc, RT2560_SECCSR0) - sc->rxq.physaddr;
1133	hw /= RT2560_RX_DESC_SIZE;
1134
1135	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1136	    BUS_DMASYNC_POSTREAD);
1137
1138	for (; sc->rxq.cur_decrypt != hw;) {
1139		desc = &sc->rxq.desc[sc->rxq.cur_decrypt];
1140		data = &sc->rxq.data[sc->rxq.cur_decrypt];
1141
1142		if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1143		    (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1144			break;
1145
1146		if (data->drop) {
1147			ifp->if_ierrors++;
1148			goto skip;
1149		}
1150
1151		if ((le32toh(desc->flags) & RT2560_RX_CIPHER_MASK) != 0 &&
1152		    (le32toh(desc->flags) & RT2560_RX_ICV_ERROR)) {
1153			ifp->if_ierrors++;
1154			goto skip;
1155		}
1156
1157		/*
1158		 * Try to allocate a new mbuf for this ring element and load it
1159		 * before processing the current mbuf. If the ring element
1160		 * cannot be loaded, drop the received packet and reuse the old
1161		 * mbuf. In the unlikely case that the old mbuf can't be
1162		 * reloaded either, explicitly panic.
1163		 */
1164		mnew = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1165		if (mnew == NULL) {
1166			ifp->if_ierrors++;
1167			goto skip;
1168		}
1169
1170		bus_dmamap_sync(sc->rxq.data_dmat, data->map,
1171		    BUS_DMASYNC_POSTREAD);
1172		bus_dmamap_unload(sc->rxq.data_dmat, data->map);
1173
1174		error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1175		    mtod(mnew, void *), MCLBYTES, rt2560_dma_map_addr,
1176		    &physaddr, 0);
1177		if (error != 0) {
1178			m_freem(mnew);
1179
1180			/* try to reload the old mbuf */
1181			error = bus_dmamap_load(sc->rxq.data_dmat, data->map,
1182			    mtod(data->m, void *), MCLBYTES,
1183			    rt2560_dma_map_addr, &physaddr, 0);
1184			if (error != 0) {
1185				/* very unlikely that it will fail... */
1186				panic("%s: could not load old rx mbuf",
1187				    device_get_name(sc->sc_dev));
1188			}
1189			ifp->if_ierrors++;
1190			goto skip;
1191		}
1192
1193		/*
1194	 	 * New mbuf successfully loaded, update Rx ring and continue
1195		 * processing.
1196		 */
1197		m = data->m;
1198		data->m = mnew;
1199		desc->physaddr = htole32(physaddr);
1200
1201		/* finalize mbuf */
1202		m->m_pkthdr.rcvif = ifp;
1203		m->m_pkthdr.len = m->m_len =
1204		    (le32toh(desc->flags) >> 16) & 0xfff;
1205
1206		rssi = RT2560_RSSI(sc, desc->rssi);
1207		nf = RT2560_NOISE_FLOOR;
1208		if (ieee80211_radiotap_active(ic)) {
1209			struct rt2560_rx_radiotap_header *tap = &sc->sc_rxtap;
1210			uint32_t tsf_lo, tsf_hi;
1211
1212			/* get timestamp (low and high 32 bits) */
1213			tsf_hi = RAL_READ(sc, RT2560_CSR17);
1214			tsf_lo = RAL_READ(sc, RT2560_CSR16);
1215
1216			tap->wr_tsf =
1217			    htole64(((uint64_t)tsf_hi << 32) | tsf_lo);
1218			tap->wr_flags = 0;
1219			tap->wr_rate = ieee80211_plcp2rate(desc->rate,
1220			    (desc->flags & htole32(RT2560_RX_OFDM)) ?
1221				IEEE80211_T_OFDM : IEEE80211_T_CCK);
1222			tap->wr_antenna = sc->rx_ant;
1223			tap->wr_antsignal = nf + rssi;
1224			tap->wr_antnoise = nf;
1225		}
1226
1227		sc->sc_flags |= RT2560_F_INPUT_RUNNING;
1228		RAL_UNLOCK(sc);
1229		wh = mtod(m, struct ieee80211_frame *);
1230		ni = ieee80211_find_rxnode(ic,
1231		    (struct ieee80211_frame_min *)wh);
1232		if (ni != NULL) {
1233			(void) ieee80211_input(ni, m, rssi, nf);
1234			ieee80211_free_node(ni);
1235		} else
1236			(void) ieee80211_input_all(ic, m, rssi, nf);
1237
1238		RAL_LOCK(sc);
1239		sc->sc_flags &= ~RT2560_F_INPUT_RUNNING;
1240skip:		desc->flags = htole32(RT2560_RX_BUSY);
1241
1242		DPRINTFN(sc, 15, "decryption done idx=%u\n", sc->rxq.cur_decrypt);
1243
1244		sc->rxq.cur_decrypt =
1245		    (sc->rxq.cur_decrypt + 1) % RT2560_RX_RING_COUNT;
1246	}
1247
1248	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1249	    BUS_DMASYNC_PREWRITE);
1250}
1251
1252/*
1253 * Some frames were received. Pass them to the hardware cipher engine before
1254 * sending them to the 802.11 layer.
1255 */
1256static void
1257rt2560_rx_intr(struct rt2560_softc *sc)
1258{
1259	struct rt2560_rx_desc *desc;
1260	struct rt2560_rx_data *data;
1261
1262	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1263	    BUS_DMASYNC_POSTREAD);
1264
1265	for (;;) {
1266		desc = &sc->rxq.desc[sc->rxq.cur];
1267		data = &sc->rxq.data[sc->rxq.cur];
1268
1269		if ((le32toh(desc->flags) & RT2560_RX_BUSY) ||
1270		    (le32toh(desc->flags) & RT2560_RX_CIPHER_BUSY))
1271			break;
1272
1273		data->drop = 0;
1274
1275		if ((le32toh(desc->flags) & RT2560_RX_PHY_ERROR) ||
1276		    (le32toh(desc->flags) & RT2560_RX_CRC_ERROR)) {
1277			/*
1278			 * This should not happen since we did not request
1279			 * to receive those frames when we filled RXCSR0.
1280			 */
1281			DPRINTFN(sc, 5, "PHY or CRC error flags 0x%08x\n",
1282			    le32toh(desc->flags));
1283			data->drop = 1;
1284		}
1285
1286		if (((le32toh(desc->flags) >> 16) & 0xfff) > MCLBYTES) {
1287			DPRINTFN(sc, 5, "%s\n", "bad length");
1288			data->drop = 1;
1289		}
1290
1291		/* mark the frame for decryption */
1292		desc->flags |= htole32(RT2560_RX_CIPHER_BUSY);
1293
1294		DPRINTFN(sc, 15, "rx done idx=%u\n", sc->rxq.cur);
1295
1296		sc->rxq.cur = (sc->rxq.cur + 1) % RT2560_RX_RING_COUNT;
1297	}
1298
1299	bus_dmamap_sync(sc->rxq.desc_dmat, sc->rxq.desc_map,
1300	    BUS_DMASYNC_PREWRITE);
1301
1302	/* kick decrypt */
1303	RAL_WRITE(sc, RT2560_SECCSR0, RT2560_KICK_DECRYPT);
1304}
1305
1306static void
1307rt2560_beacon_update(struct ieee80211vap *vap, int item)
1308{
1309	struct rt2560_vap *rvp = RT2560_VAP(vap);
1310	struct ieee80211_beacon_offsets *bo = &rvp->ral_bo;
1311
1312	setbit(bo->bo_flags, item);
1313}
1314
1315/*
1316 * This function is called periodically in IBSS mode when a new beacon must be
1317 * sent out.
1318 */
1319static void
1320rt2560_beacon_expire(struct rt2560_softc *sc)
1321{
1322	struct ifnet *ifp = sc->sc_ifp;
1323	struct ieee80211com *ic = ifp->if_l2com;
1324	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
1325	struct rt2560_vap *rvp = RT2560_VAP(vap);
1326	struct rt2560_tx_data *data;
1327
1328	if (ic->ic_opmode != IEEE80211_M_IBSS &&
1329	    ic->ic_opmode != IEEE80211_M_HOSTAP &&
1330	    ic->ic_opmode != IEEE80211_M_MBSS)
1331		return;
1332
1333	data = &sc->bcnq.data[sc->bcnq.next];
1334	/*
1335	 * Don't send beacon if bsschan isn't set
1336	 */
1337	if (data->ni == NULL)
1338	        return;
1339
1340	bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_POSTWRITE);
1341	bus_dmamap_unload(sc->bcnq.data_dmat, data->map);
1342
1343	/* XXX 1 =>'s mcast frames which means all PS sta's will wakeup! */
1344	ieee80211_beacon_update(data->ni, &rvp->ral_bo, data->m, 1);
1345
1346	rt2560_tx_bcn(sc, data->m, data->ni);
1347
1348	DPRINTFN(sc, 15, "%s", "beacon expired\n");
1349
1350	sc->bcnq.next = (sc->bcnq.next + 1) % RT2560_BEACON_RING_COUNT;
1351}
1352
1353/* ARGSUSED */
1354static void
1355rt2560_wakeup_expire(struct rt2560_softc *sc)
1356{
1357	DPRINTFN(sc, 2, "%s", "wakeup expired\n");
1358}
1359
1360void
1361rt2560_intr(void *arg)
1362{
1363	struct rt2560_softc *sc = arg;
1364	struct ifnet *ifp = sc->sc_ifp;
1365	uint32_t r;
1366
1367	RAL_LOCK(sc);
1368
1369	/* disable interrupts */
1370	RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
1371
1372	/* don't re-enable interrupts if we're shutting down */
1373	if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1374		RAL_UNLOCK(sc);
1375		return;
1376	}
1377
1378	r = RAL_READ(sc, RT2560_CSR7);
1379	RAL_WRITE(sc, RT2560_CSR7, r);
1380
1381	if (r & RT2560_BEACON_EXPIRE)
1382		rt2560_beacon_expire(sc);
1383
1384	if (r & RT2560_WAKEUP_EXPIRE)
1385		rt2560_wakeup_expire(sc);
1386
1387	if (r & RT2560_ENCRYPTION_DONE)
1388		rt2560_encryption_intr(sc);
1389
1390	if (r & RT2560_TX_DONE)
1391		rt2560_tx_intr(sc);
1392
1393	if (r & RT2560_PRIO_DONE)
1394		rt2560_prio_intr(sc);
1395
1396	if (r & RT2560_DECRYPTION_DONE)
1397		rt2560_decryption_intr(sc);
1398
1399	if (r & RT2560_RX_DONE) {
1400		rt2560_rx_intr(sc);
1401		rt2560_encryption_intr(sc);
1402	}
1403
1404	/* re-enable interrupts */
1405	RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
1406
1407	RAL_UNLOCK(sc);
1408}
1409
1410#define RAL_SIFS		10	/* us */
1411
1412#define RT2560_TXRX_TURNAROUND	10	/* us */
1413
1414static uint8_t
1415rt2560_plcp_signal(int rate)
1416{
1417	switch (rate) {
1418	/* OFDM rates (cf IEEE Std 802.11a-1999, pp. 14 Table 80) */
1419	case 12:	return 0xb;
1420	case 18:	return 0xf;
1421	case 24:	return 0xa;
1422	case 36:	return 0xe;
1423	case 48:	return 0x9;
1424	case 72:	return 0xd;
1425	case 96:	return 0x8;
1426	case 108:	return 0xc;
1427
1428	/* CCK rates (NB: not IEEE std, device-specific) */
1429	case 2:		return 0x0;
1430	case 4:		return 0x1;
1431	case 11:	return 0x2;
1432	case 22:	return 0x3;
1433	}
1434	return 0xff;		/* XXX unsupported/unknown rate */
1435}
1436
1437static void
1438rt2560_setup_tx_desc(struct rt2560_softc *sc, struct rt2560_tx_desc *desc,
1439    uint32_t flags, int len, int rate, int encrypt, bus_addr_t physaddr)
1440{
1441	struct ifnet *ifp = sc->sc_ifp;
1442	struct ieee80211com *ic = ifp->if_l2com;
1443	uint16_t plcp_length;
1444	int remainder;
1445
1446	desc->flags = htole32(flags);
1447	desc->flags |= htole32(len << 16);
1448
1449	desc->physaddr = htole32(physaddr);
1450	desc->wme = htole16(
1451	    RT2560_AIFSN(2) |
1452	    RT2560_LOGCWMIN(3) |
1453	    RT2560_LOGCWMAX(8));
1454
1455	/* setup PLCP fields */
1456	desc->plcp_signal  = rt2560_plcp_signal(rate);
1457	desc->plcp_service = 4;
1458
1459	len += IEEE80211_CRC_LEN;
1460	if (ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM) {
1461		desc->flags |= htole32(RT2560_TX_OFDM);
1462
1463		plcp_length = len & 0xfff;
1464		desc->plcp_length_hi = plcp_length >> 6;
1465		desc->plcp_length_lo = plcp_length & 0x3f;
1466	} else {
1467		plcp_length = (16 * len + rate - 1) / rate;
1468		if (rate == 22) {
1469			remainder = (16 * len) % 22;
1470			if (remainder != 0 && remainder < 7)
1471				desc->plcp_service |= RT2560_PLCP_LENGEXT;
1472		}
1473		desc->plcp_length_hi = plcp_length >> 8;
1474		desc->plcp_length_lo = plcp_length & 0xff;
1475
1476		if (rate != 2 && (ic->ic_flags & IEEE80211_F_SHPREAMBLE))
1477			desc->plcp_signal |= 0x08;
1478	}
1479
1480	if (!encrypt)
1481		desc->flags |= htole32(RT2560_TX_VALID);
1482	desc->flags |= encrypt ? htole32(RT2560_TX_CIPHER_BUSY)
1483			       : htole32(RT2560_TX_BUSY);
1484}
1485
1486static int
1487rt2560_tx_bcn(struct rt2560_softc *sc, struct mbuf *m0,
1488    struct ieee80211_node *ni)
1489{
1490	struct ieee80211vap *vap = ni->ni_vap;
1491	struct rt2560_tx_desc *desc;
1492	struct rt2560_tx_data *data;
1493	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1494	int nsegs, rate, error;
1495
1496	desc = &sc->bcnq.desc[sc->bcnq.cur];
1497	data = &sc->bcnq.data[sc->bcnq.cur];
1498
1499	/* XXX maybe a separate beacon rate? */
1500	rate = vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)].mgmtrate;
1501
1502	error = bus_dmamap_load_mbuf_sg(sc->bcnq.data_dmat, data->map, m0,
1503	    segs, &nsegs, BUS_DMA_NOWAIT);
1504	if (error != 0) {
1505		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1506		    error);
1507		m_freem(m0);
1508		return error;
1509	}
1510
1511	if (ieee80211_radiotap_active_vap(vap)) {
1512		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1513
1514		tap->wt_flags = 0;
1515		tap->wt_rate = rate;
1516		tap->wt_antenna = sc->tx_ant;
1517
1518		ieee80211_radiotap_tx(vap, m0);
1519	}
1520
1521	data->m = m0;
1522	data->ni = ni;
1523
1524	rt2560_setup_tx_desc(sc, desc, RT2560_TX_IFS_NEWBACKOFF |
1525	    RT2560_TX_TIMESTAMP, m0->m_pkthdr.len, rate, 0, segs->ds_addr);
1526
1527	DPRINTFN(sc, 10, "sending beacon frame len=%u idx=%u rate=%u\n",
1528	    m0->m_pkthdr.len, sc->bcnq.cur, rate);
1529
1530	bus_dmamap_sync(sc->bcnq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1531	bus_dmamap_sync(sc->bcnq.desc_dmat, sc->bcnq.desc_map,
1532	    BUS_DMASYNC_PREWRITE);
1533
1534	sc->bcnq.cur = (sc->bcnq.cur + 1) % RT2560_BEACON_RING_COUNT;
1535
1536	return 0;
1537}
1538
1539static int
1540rt2560_tx_mgt(struct rt2560_softc *sc, struct mbuf *m0,
1541    struct ieee80211_node *ni)
1542{
1543	struct ieee80211vap *vap = ni->ni_vap;
1544	struct ieee80211com *ic = ni->ni_ic;
1545	struct rt2560_tx_desc *desc;
1546	struct rt2560_tx_data *data;
1547	struct ieee80211_frame *wh;
1548	struct ieee80211_key *k;
1549	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1550	uint16_t dur;
1551	uint32_t flags = 0;
1552	int nsegs, rate, error;
1553
1554	desc = &sc->prioq.desc[sc->prioq.cur];
1555	data = &sc->prioq.data[sc->prioq.cur];
1556
1557	rate = vap->iv_txparms[ieee80211_chan2mode(ic->ic_curchan)].mgmtrate;
1558
1559	wh = mtod(m0, struct ieee80211_frame *);
1560
1561	if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1562		k = ieee80211_crypto_encap(ni, m0);
1563		if (k == NULL) {
1564			m_freem(m0);
1565			return ENOBUFS;
1566		}
1567	}
1568
1569	error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0,
1570	    segs, &nsegs, 0);
1571	if (error != 0) {
1572		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1573		    error);
1574		m_freem(m0);
1575		return error;
1576	}
1577
1578	if (ieee80211_radiotap_active_vap(vap)) {
1579		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1580
1581		tap->wt_flags = 0;
1582		tap->wt_rate = rate;
1583		tap->wt_antenna = sc->tx_ant;
1584
1585		ieee80211_radiotap_tx(vap, m0);
1586	}
1587
1588	data->m = m0;
1589	data->ni = ni;
1590	/* management frames are not taken into account for amrr */
1591	data->rix = IEEE80211_FIXED_RATE_NONE;
1592
1593	wh = mtod(m0, struct ieee80211_frame *);
1594
1595	if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1596		flags |= RT2560_TX_ACK;
1597
1598		dur = ieee80211_ack_duration(ic->ic_rt,
1599		    rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1600		*(uint16_t *)wh->i_dur = htole16(dur);
1601
1602		/* tell hardware to add timestamp for probe responses */
1603		if ((wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) ==
1604		    IEEE80211_FC0_TYPE_MGT &&
1605		    (wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK) ==
1606		    IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1607			flags |= RT2560_TX_TIMESTAMP;
1608	}
1609
1610	rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 0,
1611	    segs->ds_addr);
1612
1613	bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1614	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1615	    BUS_DMASYNC_PREWRITE);
1616
1617	DPRINTFN(sc, 10, "sending mgt frame len=%u idx=%u rate=%u\n",
1618	    m0->m_pkthdr.len, sc->prioq.cur, rate);
1619
1620	/* kick prio */
1621	sc->prioq.queued++;
1622	sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1623	RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1624
1625	return 0;
1626}
1627
1628static int
1629rt2560_sendprot(struct rt2560_softc *sc,
1630    const struct mbuf *m, struct ieee80211_node *ni, int prot, int rate)
1631{
1632	struct ieee80211com *ic = ni->ni_ic;
1633	const struct ieee80211_frame *wh;
1634	struct rt2560_tx_desc *desc;
1635	struct rt2560_tx_data *data;
1636	struct mbuf *mprot;
1637	int protrate, ackrate, pktlen, flags, isshort, error;
1638	uint16_t dur;
1639	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1640	int nsegs;
1641
1642	KASSERT(prot == IEEE80211_PROT_RTSCTS || prot == IEEE80211_PROT_CTSONLY,
1643	    ("protection %d", prot));
1644
1645	wh = mtod(m, const struct ieee80211_frame *);
1646	pktlen = m->m_pkthdr.len + IEEE80211_CRC_LEN;
1647
1648	protrate = ieee80211_ctl_rate(ic->ic_rt, rate);
1649	ackrate = ieee80211_ack_rate(ic->ic_rt, rate);
1650
1651	isshort = (ic->ic_flags & IEEE80211_F_SHPREAMBLE) != 0;
1652	dur = ieee80211_compute_duration(ic->ic_rt, pktlen, rate, isshort)
1653	    + ieee80211_ack_duration(ic->ic_rt, rate, isshort);
1654	flags = RT2560_TX_MORE_FRAG;
1655	if (prot == IEEE80211_PROT_RTSCTS) {
1656		/* NB: CTS is the same size as an ACK */
1657		dur += ieee80211_ack_duration(ic->ic_rt, rate, isshort);
1658		flags |= RT2560_TX_ACK;
1659		mprot = ieee80211_alloc_rts(ic, wh->i_addr1, wh->i_addr2, dur);
1660	} else {
1661		mprot = ieee80211_alloc_cts(ic, ni->ni_vap->iv_myaddr, dur);
1662	}
1663	if (mprot == NULL) {
1664		/* XXX stat + msg */
1665		return ENOBUFS;
1666	}
1667
1668	desc = &sc->txq.desc[sc->txq.cur_encrypt];
1669	data = &sc->txq.data[sc->txq.cur_encrypt];
1670
1671	error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map,
1672	    mprot, segs, &nsegs, 0);
1673	if (error != 0) {
1674		device_printf(sc->sc_dev,
1675		    "could not map mbuf (error %d)\n", error);
1676		m_freem(mprot);
1677		return error;
1678	}
1679
1680	data->m = mprot;
1681	data->ni = ieee80211_ref_node(ni);
1682	/* ctl frames are not taken into account for amrr */
1683	data->rix = IEEE80211_FIXED_RATE_NONE;
1684
1685	rt2560_setup_tx_desc(sc, desc, flags, mprot->m_pkthdr.len, protrate, 1,
1686	    segs->ds_addr);
1687
1688	bus_dmamap_sync(sc->txq.data_dmat, data->map,
1689	    BUS_DMASYNC_PREWRITE);
1690
1691	sc->txq.queued++;
1692	sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1693
1694	return 0;
1695}
1696
1697static int
1698rt2560_tx_raw(struct rt2560_softc *sc, struct mbuf *m0,
1699    struct ieee80211_node *ni, const struct ieee80211_bpf_params *params)
1700{
1701	struct ieee80211vap *vap = ni->ni_vap;
1702	struct ieee80211com *ic = ni->ni_ic;
1703	struct rt2560_tx_desc *desc;
1704	struct rt2560_tx_data *data;
1705	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1706	uint32_t flags;
1707	int nsegs, rate, error;
1708
1709	desc = &sc->prioq.desc[sc->prioq.cur];
1710	data = &sc->prioq.data[sc->prioq.cur];
1711
1712	rate = params->ibp_rate0;
1713	if (!ieee80211_isratevalid(ic->ic_rt, rate)) {
1714		/* XXX fall back to mcast/mgmt rate? */
1715		m_freem(m0);
1716		return EINVAL;
1717	}
1718
1719	flags = 0;
1720	if ((params->ibp_flags & IEEE80211_BPF_NOACK) == 0)
1721		flags |= RT2560_TX_ACK;
1722	if (params->ibp_flags & (IEEE80211_BPF_RTS|IEEE80211_BPF_CTS)) {
1723		error = rt2560_sendprot(sc, m0, ni,
1724		    params->ibp_flags & IEEE80211_BPF_RTS ?
1725			 IEEE80211_PROT_RTSCTS : IEEE80211_PROT_CTSONLY,
1726		    rate);
1727		if (error) {
1728			m_freem(m0);
1729			return error;
1730		}
1731		flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1732	}
1733
1734	error = bus_dmamap_load_mbuf_sg(sc->prioq.data_dmat, data->map, m0,
1735	    segs, &nsegs, 0);
1736	if (error != 0) {
1737		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1738		    error);
1739		m_freem(m0);
1740		return error;
1741	}
1742
1743	if (ieee80211_radiotap_active_vap(vap)) {
1744		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1745
1746		tap->wt_flags = 0;
1747		tap->wt_rate = rate;
1748		tap->wt_antenna = sc->tx_ant;
1749
1750		ieee80211_radiotap_tx(ni->ni_vap, m0);
1751	}
1752
1753	data->m = m0;
1754	data->ni = ni;
1755
1756	/* XXX need to setup descriptor ourself */
1757	rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len,
1758	    rate, (params->ibp_flags & IEEE80211_BPF_CRYPTO) != 0,
1759	    segs->ds_addr);
1760
1761	bus_dmamap_sync(sc->prioq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1762	bus_dmamap_sync(sc->prioq.desc_dmat, sc->prioq.desc_map,
1763	    BUS_DMASYNC_PREWRITE);
1764
1765	DPRINTFN(sc, 10, "sending raw frame len=%u idx=%u rate=%u\n",
1766	    m0->m_pkthdr.len, sc->prioq.cur, rate);
1767
1768	/* kick prio */
1769	sc->prioq.queued++;
1770	sc->prioq.cur = (sc->prioq.cur + 1) % RT2560_PRIO_RING_COUNT;
1771	RAL_WRITE(sc, RT2560_TXCSR0, RT2560_KICK_PRIO);
1772
1773	return 0;
1774}
1775
1776static int
1777rt2560_tx_data(struct rt2560_softc *sc, struct mbuf *m0,
1778    struct ieee80211_node *ni)
1779{
1780	struct ieee80211vap *vap = ni->ni_vap;
1781	struct ieee80211com *ic = ni->ni_ic;
1782	struct rt2560_tx_desc *desc;
1783	struct rt2560_tx_data *data;
1784	struct ieee80211_frame *wh;
1785	const struct ieee80211_txparam *tp;
1786	struct ieee80211_key *k;
1787	struct mbuf *mnew;
1788	bus_dma_segment_t segs[RT2560_MAX_SCATTER];
1789	uint16_t dur;
1790	uint32_t flags;
1791	int nsegs, rate, error;
1792
1793	wh = mtod(m0, struct ieee80211_frame *);
1794
1795	tp = &vap->iv_txparms[ieee80211_chan2mode(ni->ni_chan)];
1796	if (IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1797		rate = tp->mcastrate;
1798	} else if (m0->m_flags & M_EAPOL) {
1799		rate = tp->mgmtrate;
1800	} else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE) {
1801		rate = tp->ucastrate;
1802	} else {
1803		(void) ieee80211_ratectl_rate(ni, NULL, 0);
1804		rate = ni->ni_txrate;
1805	}
1806
1807	if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
1808		k = ieee80211_crypto_encap(ni, m0);
1809		if (k == NULL) {
1810			m_freem(m0);
1811			return ENOBUFS;
1812		}
1813
1814		/* packet header may have moved, reset our local pointer */
1815		wh = mtod(m0, struct ieee80211_frame *);
1816	}
1817
1818	flags = 0;
1819	if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1820		int prot = IEEE80211_PROT_NONE;
1821		if (m0->m_pkthdr.len + IEEE80211_CRC_LEN > vap->iv_rtsthreshold)
1822			prot = IEEE80211_PROT_RTSCTS;
1823		else if ((ic->ic_flags & IEEE80211_F_USEPROT) &&
1824		    ieee80211_rate2phytype(ic->ic_rt, rate) == IEEE80211_T_OFDM)
1825			prot = ic->ic_protmode;
1826		if (prot != IEEE80211_PROT_NONE) {
1827			error = rt2560_sendprot(sc, m0, ni, prot, rate);
1828			if (error) {
1829				m_freem(m0);
1830				return error;
1831			}
1832			flags |= RT2560_TX_LONG_RETRY | RT2560_TX_IFS_SIFS;
1833		}
1834	}
1835
1836	data = &sc->txq.data[sc->txq.cur_encrypt];
1837	desc = &sc->txq.desc[sc->txq.cur_encrypt];
1838
1839	error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map, m0,
1840	    segs, &nsegs, 0);
1841	if (error != 0 && error != EFBIG) {
1842		device_printf(sc->sc_dev, "could not map mbuf (error %d)\n",
1843		    error);
1844		m_freem(m0);
1845		return error;
1846	}
1847	if (error != 0) {
1848		mnew = m_defrag(m0, M_NOWAIT);
1849		if (mnew == NULL) {
1850			device_printf(sc->sc_dev,
1851			    "could not defragment mbuf\n");
1852			m_freem(m0);
1853			return ENOBUFS;
1854		}
1855		m0 = mnew;
1856
1857		error = bus_dmamap_load_mbuf_sg(sc->txq.data_dmat, data->map,
1858		    m0, segs, &nsegs, 0);
1859		if (error != 0) {
1860			device_printf(sc->sc_dev,
1861			    "could not map mbuf (error %d)\n", error);
1862			m_freem(m0);
1863			return error;
1864		}
1865
1866		/* packet header may have moved, reset our local pointer */
1867		wh = mtod(m0, struct ieee80211_frame *);
1868	}
1869
1870	if (ieee80211_radiotap_active_vap(vap)) {
1871		struct rt2560_tx_radiotap_header *tap = &sc->sc_txtap;
1872
1873		tap->wt_flags = 0;
1874		tap->wt_rate = rate;
1875		tap->wt_antenna = sc->tx_ant;
1876
1877		ieee80211_radiotap_tx(vap, m0);
1878	}
1879
1880	data->m = m0;
1881	data->ni = ni;
1882
1883	/* remember link conditions for rate adaptation algorithm */
1884	if (tp->ucastrate == IEEE80211_FIXED_RATE_NONE) {
1885		data->rix = ni->ni_txrate;
1886		/* XXX probably need last rssi value and not avg */
1887		data->rssi = ic->ic_node_getrssi(ni);
1888	} else
1889		data->rix = IEEE80211_FIXED_RATE_NONE;
1890
1891	if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
1892		flags |= RT2560_TX_ACK;
1893
1894		dur = ieee80211_ack_duration(ic->ic_rt,
1895		    rate, ic->ic_flags & IEEE80211_F_SHPREAMBLE);
1896		*(uint16_t *)wh->i_dur = htole16(dur);
1897	}
1898
1899	rt2560_setup_tx_desc(sc, desc, flags, m0->m_pkthdr.len, rate, 1,
1900	    segs->ds_addr);
1901
1902	bus_dmamap_sync(sc->txq.data_dmat, data->map, BUS_DMASYNC_PREWRITE);
1903	bus_dmamap_sync(sc->txq.desc_dmat, sc->txq.desc_map,
1904	    BUS_DMASYNC_PREWRITE);
1905
1906	DPRINTFN(sc, 10, "sending data frame len=%u idx=%u rate=%u\n",
1907	    m0->m_pkthdr.len, sc->txq.cur_encrypt, rate);
1908
1909	/* kick encrypt */
1910	sc->txq.queued++;
1911	sc->txq.cur_encrypt = (sc->txq.cur_encrypt + 1) % RT2560_TX_RING_COUNT;
1912	RAL_WRITE(sc, RT2560_SECCSR1, RT2560_KICK_ENCRYPT);
1913
1914	return 0;
1915}
1916
1917static void
1918rt2560_start_locked(struct ifnet *ifp)
1919{
1920	struct rt2560_softc *sc = ifp->if_softc;
1921	struct mbuf *m;
1922	struct ieee80211_node *ni;
1923
1924	RAL_LOCK_ASSERT(sc);
1925
1926	for (;;) {
1927		IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
1928		if (m == NULL)
1929			break;
1930		if (sc->txq.queued >= RT2560_TX_RING_COUNT - 1) {
1931			IFQ_DRV_PREPEND(&ifp->if_snd, m);
1932			ifp->if_drv_flags |= IFF_DRV_OACTIVE;
1933			sc->sc_flags |= RT2560_F_DATA_OACTIVE;
1934			break;
1935		}
1936		ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
1937		if (rt2560_tx_data(sc, m, ni) != 0) {
1938			ieee80211_free_node(ni);
1939			ifp->if_oerrors++;
1940			break;
1941		}
1942
1943		sc->sc_tx_timer = 5;
1944	}
1945}
1946
1947static void
1948rt2560_start(struct ifnet *ifp)
1949{
1950	struct rt2560_softc *sc = ifp->if_softc;
1951
1952	RAL_LOCK(sc);
1953	rt2560_start_locked(ifp);
1954	RAL_UNLOCK(sc);
1955}
1956
1957static void
1958rt2560_watchdog(void *arg)
1959{
1960	struct rt2560_softc *sc = arg;
1961	struct ifnet *ifp = sc->sc_ifp;
1962
1963	RAL_LOCK_ASSERT(sc);
1964
1965	KASSERT(ifp->if_drv_flags & IFF_DRV_RUNNING, ("not running"));
1966
1967	if (sc->sc_invalid)		/* card ejected */
1968		return;
1969
1970	rt2560_encryption_intr(sc);
1971	rt2560_tx_intr(sc);
1972
1973	if (sc->sc_tx_timer > 0 && --sc->sc_tx_timer == 0) {
1974		if_printf(ifp, "device timeout\n");
1975		rt2560_init_locked(sc);
1976		ifp->if_oerrors++;
1977		/* NB: callout is reset in rt2560_init() */
1978		return;
1979	}
1980	callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc);
1981}
1982
1983static int
1984rt2560_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1985{
1986	struct rt2560_softc *sc = ifp->if_softc;
1987	struct ieee80211com *ic = ifp->if_l2com;
1988	struct ifreq *ifr = (struct ifreq *) data;
1989	int error = 0, startall = 0;
1990
1991	switch (cmd) {
1992	case SIOCSIFFLAGS:
1993		RAL_LOCK(sc);
1994		if (ifp->if_flags & IFF_UP) {
1995			if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1996				rt2560_init_locked(sc);
1997				startall = 1;
1998			} else
1999				rt2560_update_promisc(ifp);
2000		} else {
2001			if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2002				rt2560_stop_locked(sc);
2003		}
2004		RAL_UNLOCK(sc);
2005		if (startall)
2006			ieee80211_start_all(ic);
2007		break;
2008	case SIOCGIFMEDIA:
2009		error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
2010		break;
2011	case SIOCGIFADDR:
2012		error = ether_ioctl(ifp, cmd, data);
2013		break;
2014	default:
2015		error = EINVAL;
2016		break;
2017	}
2018	return error;
2019}
2020
2021static void
2022rt2560_bbp_write(struct rt2560_softc *sc, uint8_t reg, uint8_t val)
2023{
2024	uint32_t tmp;
2025	int ntries;
2026
2027	for (ntries = 0; ntries < 100; ntries++) {
2028		if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
2029			break;
2030		DELAY(1);
2031	}
2032	if (ntries == 100) {
2033		device_printf(sc->sc_dev, "could not write to BBP\n");
2034		return;
2035	}
2036
2037	tmp = RT2560_BBP_WRITE | RT2560_BBP_BUSY | reg << 8 | val;
2038	RAL_WRITE(sc, RT2560_BBPCSR, tmp);
2039
2040	DPRINTFN(sc, 15, "BBP R%u <- 0x%02x\n", reg, val);
2041}
2042
2043static uint8_t
2044rt2560_bbp_read(struct rt2560_softc *sc, uint8_t reg)
2045{
2046	uint32_t val;
2047	int ntries;
2048
2049	for (ntries = 0; ntries < 100; ntries++) {
2050		if (!(RAL_READ(sc, RT2560_BBPCSR) & RT2560_BBP_BUSY))
2051			break;
2052		DELAY(1);
2053	}
2054	if (ntries == 100) {
2055		device_printf(sc->sc_dev, "could not read from BBP\n");
2056		return 0;
2057	}
2058
2059	val = RT2560_BBP_BUSY | reg << 8;
2060	RAL_WRITE(sc, RT2560_BBPCSR, val);
2061
2062	for (ntries = 0; ntries < 100; ntries++) {
2063		val = RAL_READ(sc, RT2560_BBPCSR);
2064		if (!(val & RT2560_BBP_BUSY))
2065			return val & 0xff;
2066		DELAY(1);
2067	}
2068
2069	device_printf(sc->sc_dev, "could not read from BBP\n");
2070	return 0;
2071}
2072
2073static void
2074rt2560_rf_write(struct rt2560_softc *sc, uint8_t reg, uint32_t val)
2075{
2076	uint32_t tmp;
2077	int ntries;
2078
2079	for (ntries = 0; ntries < 100; ntries++) {
2080		if (!(RAL_READ(sc, RT2560_RFCSR) & RT2560_RF_BUSY))
2081			break;
2082		DELAY(1);
2083	}
2084	if (ntries == 100) {
2085		device_printf(sc->sc_dev, "could not write to RF\n");
2086		return;
2087	}
2088
2089	tmp = RT2560_RF_BUSY | RT2560_RF_20BIT | (val & 0xfffff) << 2 |
2090	    (reg & 0x3);
2091	RAL_WRITE(sc, RT2560_RFCSR, tmp);
2092
2093	/* remember last written value in sc */
2094	sc->rf_regs[reg] = val;
2095
2096	DPRINTFN(sc, 15, "RF R[%u] <- 0x%05x\n", reg & 0x3, val & 0xfffff);
2097}
2098
2099static void
2100rt2560_set_chan(struct rt2560_softc *sc, struct ieee80211_channel *c)
2101{
2102	struct ifnet *ifp = sc->sc_ifp;
2103	struct ieee80211com *ic = ifp->if_l2com;
2104	uint8_t power, tmp;
2105	u_int i, chan;
2106
2107	chan = ieee80211_chan2ieee(ic, c);
2108	KASSERT(chan != 0 && chan != IEEE80211_CHAN_ANY, ("chan 0x%x", chan));
2109
2110	if (IEEE80211_IS_CHAN_2GHZ(c))
2111		power = min(sc->txpow[chan - 1], 31);
2112	else
2113		power = 31;
2114
2115	/* adjust txpower using ifconfig settings */
2116	power -= (100 - ic->ic_txpowlimit) / 8;
2117
2118	DPRINTFN(sc, 2, "setting channel to %u, txpower to %u\n", chan, power);
2119
2120	switch (sc->rf_rev) {
2121	case RT2560_RF_2522:
2122		rt2560_rf_write(sc, RAL_RF1, 0x00814);
2123		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2522_r2[chan - 1]);
2124		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2125		break;
2126
2127	case RT2560_RF_2523:
2128		rt2560_rf_write(sc, RAL_RF1, 0x08804);
2129		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2523_r2[chan - 1]);
2130		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x38044);
2131		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2132		break;
2133
2134	case RT2560_RF_2524:
2135		rt2560_rf_write(sc, RAL_RF1, 0x0c808);
2136		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2524_r2[chan - 1]);
2137		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2138		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2139		break;
2140
2141	case RT2560_RF_2525:
2142		rt2560_rf_write(sc, RAL_RF1, 0x08808);
2143		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_hi_r2[chan - 1]);
2144		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2145		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2146
2147		rt2560_rf_write(sc, RAL_RF1, 0x08808);
2148		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525_r2[chan - 1]);
2149		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2150		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00280 : 0x00286);
2151		break;
2152
2153	case RT2560_RF_2525E:
2154		rt2560_rf_write(sc, RAL_RF1, 0x08808);
2155		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2525e_r2[chan - 1]);
2156		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2157		rt2560_rf_write(sc, RAL_RF4, (chan == 14) ? 0x00286 : 0x00282);
2158		break;
2159
2160	case RT2560_RF_2526:
2161		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_hi_r2[chan - 1]);
2162		rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2163		rt2560_rf_write(sc, RAL_RF1, 0x08804);
2164
2165		rt2560_rf_write(sc, RAL_RF2, rt2560_rf2526_r2[chan - 1]);
2166		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x18044);
2167		rt2560_rf_write(sc, RAL_RF4, (chan & 1) ? 0x00386 : 0x00381);
2168		break;
2169
2170	/* dual-band RF */
2171	case RT2560_RF_5222:
2172		for (i = 0; rt2560_rf5222[i].chan != chan; i++);
2173
2174		rt2560_rf_write(sc, RAL_RF1, rt2560_rf5222[i].r1);
2175		rt2560_rf_write(sc, RAL_RF2, rt2560_rf5222[i].r2);
2176		rt2560_rf_write(sc, RAL_RF3, power << 7 | 0x00040);
2177		rt2560_rf_write(sc, RAL_RF4, rt2560_rf5222[i].r4);
2178		break;
2179	default:
2180 	        printf("unknown ral rev=%d\n", sc->rf_rev);
2181	}
2182
2183	/* XXX */
2184	if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
2185		/* set Japan filter bit for channel 14 */
2186		tmp = rt2560_bbp_read(sc, 70);
2187
2188		tmp &= ~RT2560_JAPAN_FILTER;
2189		if (chan == 14)
2190			tmp |= RT2560_JAPAN_FILTER;
2191
2192		rt2560_bbp_write(sc, 70, tmp);
2193
2194		/* clear CRC errors */
2195		RAL_READ(sc, RT2560_CNT0);
2196	}
2197}
2198
2199static void
2200rt2560_set_channel(struct ieee80211com *ic)
2201{
2202	struct ifnet *ifp = ic->ic_ifp;
2203	struct rt2560_softc *sc = ifp->if_softc;
2204
2205	RAL_LOCK(sc);
2206	rt2560_set_chan(sc, ic->ic_curchan);
2207	RAL_UNLOCK(sc);
2208
2209}
2210
2211#if 0
2212/*
2213 * Disable RF auto-tuning.
2214 */
2215static void
2216rt2560_disable_rf_tune(struct rt2560_softc *sc)
2217{
2218	uint32_t tmp;
2219
2220	if (sc->rf_rev != RT2560_RF_2523) {
2221		tmp = sc->rf_regs[RAL_RF1] & ~RAL_RF1_AUTOTUNE;
2222		rt2560_rf_write(sc, RAL_RF1, tmp);
2223	}
2224
2225	tmp = sc->rf_regs[RAL_RF3] & ~RAL_RF3_AUTOTUNE;
2226	rt2560_rf_write(sc, RAL_RF3, tmp);
2227
2228	DPRINTFN(sc, 2, "%s", "disabling RF autotune\n");
2229}
2230#endif
2231
2232/*
2233 * Refer to IEEE Std 802.11-1999 pp. 123 for more information on TSF
2234 * synchronization.
2235 */
2236static void
2237rt2560_enable_tsf_sync(struct rt2560_softc *sc)
2238{
2239	struct ifnet *ifp = sc->sc_ifp;
2240	struct ieee80211com *ic = ifp->if_l2com;
2241	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2242	uint16_t logcwmin, preload;
2243	uint32_t tmp;
2244
2245	/* first, disable TSF synchronization */
2246	RAL_WRITE(sc, RT2560_CSR14, 0);
2247
2248	tmp = 16 * vap->iv_bss->ni_intval;
2249	RAL_WRITE(sc, RT2560_CSR12, tmp);
2250
2251	RAL_WRITE(sc, RT2560_CSR13, 0);
2252
2253	logcwmin = 5;
2254	preload = (vap->iv_opmode == IEEE80211_M_STA) ? 384 : 1024;
2255	tmp = logcwmin << 16 | preload;
2256	RAL_WRITE(sc, RT2560_BCNOCSR, tmp);
2257
2258	/* finally, enable TSF synchronization */
2259	tmp = RT2560_ENABLE_TSF | RT2560_ENABLE_TBCN;
2260	if (ic->ic_opmode == IEEE80211_M_STA)
2261		tmp |= RT2560_ENABLE_TSF_SYNC(1);
2262	else
2263		tmp |= RT2560_ENABLE_TSF_SYNC(2) |
2264		       RT2560_ENABLE_BEACON_GENERATOR;
2265	RAL_WRITE(sc, RT2560_CSR14, tmp);
2266
2267	DPRINTF(sc, "%s", "enabling TSF synchronization\n");
2268}
2269
2270static void
2271rt2560_enable_tsf(struct rt2560_softc *sc)
2272{
2273	RAL_WRITE(sc, RT2560_CSR14, 0);
2274	RAL_WRITE(sc, RT2560_CSR14,
2275	    RT2560_ENABLE_TSF_SYNC(2) | RT2560_ENABLE_TSF);
2276}
2277
2278static void
2279rt2560_update_plcp(struct rt2560_softc *sc)
2280{
2281	struct ifnet *ifp = sc->sc_ifp;
2282	struct ieee80211com *ic = ifp->if_l2com;
2283
2284	/* no short preamble for 1Mbps */
2285	RAL_WRITE(sc, RT2560_PLCP1MCSR, 0x00700400);
2286
2287	if (!(ic->ic_flags & IEEE80211_F_SHPREAMBLE)) {
2288		/* values taken from the reference driver */
2289		RAL_WRITE(sc, RT2560_PLCP2MCSR,   0x00380401);
2290		RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x00150402);
2291		RAL_WRITE(sc, RT2560_PLCP11MCSR,  0x000b8403);
2292	} else {
2293		/* same values as above or'ed 0x8 */
2294		RAL_WRITE(sc, RT2560_PLCP2MCSR,   0x00380409);
2295		RAL_WRITE(sc, RT2560_PLCP5p5MCSR, 0x0015040a);
2296		RAL_WRITE(sc, RT2560_PLCP11MCSR,  0x000b840b);
2297	}
2298
2299	DPRINTF(sc, "updating PLCP for %s preamble\n",
2300	    (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ? "short" : "long");
2301}
2302
2303/*
2304 * This function can be called by ieee80211_set_shortslottime(). Refer to
2305 * IEEE Std 802.11-1999 pp. 85 to know how these values are computed.
2306 */
2307static void
2308rt2560_update_slot(struct ifnet *ifp)
2309{
2310	struct rt2560_softc *sc = ifp->if_softc;
2311	struct ieee80211com *ic = ifp->if_l2com;
2312	uint8_t slottime;
2313	uint16_t tx_sifs, tx_pifs, tx_difs, eifs;
2314	uint32_t tmp;
2315
2316#ifndef FORCE_SLOTTIME
2317	slottime = (ic->ic_flags & IEEE80211_F_SHSLOT) ? 9 : 20;
2318#else
2319	/*
2320	 * Setting slot time according to "short slot time" capability
2321	 * in beacon/probe_resp seems to cause problem to acknowledge
2322	 * certain AP's data frames transimitted at CCK/DS rates: the
2323	 * problematic AP keeps retransmitting data frames, probably
2324	 * because MAC level acks are not received by hardware.
2325	 * So we cheat a little bit here by claiming we are capable of
2326	 * "short slot time" but setting hardware slot time to the normal
2327	 * slot time.  ral(4) does not seem to have trouble to receive
2328	 * frames transmitted using short slot time even if hardware
2329	 * slot time is set to normal slot time.  If we didn't use this
2330	 * trick, we would have to claim that short slot time is not
2331	 * supported; this would give relative poor RX performance
2332	 * (-1Mb~-2Mb lower) and the _whole_ BSS would stop using short
2333	 * slot time.
2334	 */
2335	slottime = 20;
2336#endif
2337
2338	/* update the MAC slot boundaries */
2339	tx_sifs = RAL_SIFS - RT2560_TXRX_TURNAROUND;
2340	tx_pifs = tx_sifs + slottime;
2341	tx_difs = tx_sifs + 2 * slottime;
2342	eifs = (ic->ic_curmode == IEEE80211_MODE_11B) ? 364 : 60;
2343
2344	tmp = RAL_READ(sc, RT2560_CSR11);
2345	tmp = (tmp & ~0x1f00) | slottime << 8;
2346	RAL_WRITE(sc, RT2560_CSR11, tmp);
2347
2348	tmp = tx_pifs << 16 | tx_sifs;
2349	RAL_WRITE(sc, RT2560_CSR18, tmp);
2350
2351	tmp = eifs << 16 | tx_difs;
2352	RAL_WRITE(sc, RT2560_CSR19, tmp);
2353
2354	DPRINTF(sc, "setting slottime to %uus\n", slottime);
2355}
2356
2357static void
2358rt2560_set_basicrates(struct rt2560_softc *sc,
2359    const struct ieee80211_rateset *rs)
2360{
2361#define RV(r)	((r) & IEEE80211_RATE_VAL)
2362	struct ifnet *ifp = sc->sc_ifp;
2363	struct ieee80211com *ic = ifp->if_l2com;
2364	uint32_t mask = 0;
2365	uint8_t rate;
2366	int i;
2367
2368	for (i = 0; i < rs->rs_nrates; i++) {
2369		rate = rs->rs_rates[i];
2370
2371		if (!(rate & IEEE80211_RATE_BASIC))
2372			continue;
2373
2374		mask |= 1 << ieee80211_legacy_rate_lookup(ic->ic_rt, RV(rate));
2375	}
2376
2377	RAL_WRITE(sc, RT2560_ARSP_PLCP_1, mask);
2378
2379	DPRINTF(sc, "Setting basic rate mask to 0x%x\n", mask);
2380#undef RV
2381}
2382
2383static void
2384rt2560_update_led(struct rt2560_softc *sc, int led1, int led2)
2385{
2386	uint32_t tmp;
2387
2388	/* set ON period to 70ms and OFF period to 30ms */
2389	tmp = led1 << 16 | led2 << 17 | 70 << 8 | 30;
2390	RAL_WRITE(sc, RT2560_LEDCSR, tmp);
2391}
2392
2393static void
2394rt2560_set_bssid(struct rt2560_softc *sc, const uint8_t *bssid)
2395{
2396	uint32_t tmp;
2397
2398	tmp = bssid[0] | bssid[1] << 8 | bssid[2] << 16 | bssid[3] << 24;
2399	RAL_WRITE(sc, RT2560_CSR5, tmp);
2400
2401	tmp = bssid[4] | bssid[5] << 8;
2402	RAL_WRITE(sc, RT2560_CSR6, tmp);
2403
2404	DPRINTF(sc, "setting BSSID to %6D\n", bssid, ":");
2405}
2406
2407static void
2408rt2560_set_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2409{
2410	uint32_t tmp;
2411
2412	tmp = addr[0] | addr[1] << 8 | addr[2] << 16 | addr[3] << 24;
2413	RAL_WRITE(sc, RT2560_CSR3, tmp);
2414
2415	tmp = addr[4] | addr[5] << 8;
2416	RAL_WRITE(sc, RT2560_CSR4, tmp);
2417
2418	DPRINTF(sc, "setting MAC address to %6D\n", addr, ":");
2419}
2420
2421static void
2422rt2560_get_macaddr(struct rt2560_softc *sc, uint8_t *addr)
2423{
2424	uint32_t tmp;
2425
2426	tmp = RAL_READ(sc, RT2560_CSR3);
2427	addr[0] = tmp & 0xff;
2428	addr[1] = (tmp >>  8) & 0xff;
2429	addr[2] = (tmp >> 16) & 0xff;
2430	addr[3] = (tmp >> 24);
2431
2432	tmp = RAL_READ(sc, RT2560_CSR4);
2433	addr[4] = tmp & 0xff;
2434	addr[5] = (tmp >> 8) & 0xff;
2435}
2436
2437static void
2438rt2560_update_promisc(struct ifnet *ifp)
2439{
2440	struct rt2560_softc *sc = ifp->if_softc;
2441	uint32_t tmp;
2442
2443	tmp = RAL_READ(sc, RT2560_RXCSR0);
2444
2445	tmp &= ~RT2560_DROP_NOT_TO_ME;
2446	if (!(ifp->if_flags & IFF_PROMISC))
2447		tmp |= RT2560_DROP_NOT_TO_ME;
2448
2449	RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2450
2451	DPRINTF(sc, "%s promiscuous mode\n", (ifp->if_flags & IFF_PROMISC) ?
2452	    "entering" : "leaving");
2453}
2454
2455static const char *
2456rt2560_get_rf(int rev)
2457{
2458	switch (rev) {
2459	case RT2560_RF_2522:	return "RT2522";
2460	case RT2560_RF_2523:	return "RT2523";
2461	case RT2560_RF_2524:	return "RT2524";
2462	case RT2560_RF_2525:	return "RT2525";
2463	case RT2560_RF_2525E:	return "RT2525e";
2464	case RT2560_RF_2526:	return "RT2526";
2465	case RT2560_RF_5222:	return "RT5222";
2466	default:		return "unknown";
2467	}
2468}
2469
2470static void
2471rt2560_read_config(struct rt2560_softc *sc)
2472{
2473	uint16_t val;
2474	int i;
2475
2476	val = rt2560_eeprom_read(sc, RT2560_EEPROM_CONFIG0);
2477	sc->rf_rev =   (val >> 11) & 0x7;
2478	sc->hw_radio = (val >> 10) & 0x1;
2479	sc->led_mode = (val >> 6)  & 0x7;
2480	sc->rx_ant =   (val >> 4)  & 0x3;
2481	sc->tx_ant =   (val >> 2)  & 0x3;
2482	sc->nb_ant =   val & 0x3;
2483
2484	/* read default values for BBP registers */
2485	for (i = 0; i < 16; i++) {
2486		val = rt2560_eeprom_read(sc, RT2560_EEPROM_BBP_BASE + i);
2487		if (val == 0 || val == 0xffff)
2488			continue;
2489
2490		sc->bbp_prom[i].reg = val >> 8;
2491		sc->bbp_prom[i].val = val & 0xff;
2492	}
2493
2494	/* read Tx power for all b/g channels */
2495	for (i = 0; i < 14 / 2; i++) {
2496		val = rt2560_eeprom_read(sc, RT2560_EEPROM_TXPOWER + i);
2497		sc->txpow[i * 2] = val & 0xff;
2498		sc->txpow[i * 2 + 1] = val >> 8;
2499	}
2500	for (i = 0; i < 14; ++i) {
2501		if (sc->txpow[i] > 31)
2502			sc->txpow[i] = 24;
2503	}
2504
2505	val = rt2560_eeprom_read(sc, RT2560_EEPROM_CALIBRATE);
2506	if ((val & 0xff) == 0xff)
2507		sc->rssi_corr = RT2560_DEFAULT_RSSI_CORR;
2508	else
2509		sc->rssi_corr = val & 0xff;
2510	DPRINTF(sc, "rssi correction %d, calibrate 0x%02x\n",
2511		 sc->rssi_corr, val);
2512}
2513
2514
2515static void
2516rt2560_scan_start(struct ieee80211com *ic)
2517{
2518	struct ifnet *ifp = ic->ic_ifp;
2519	struct rt2560_softc *sc = ifp->if_softc;
2520
2521	/* abort TSF synchronization */
2522	RAL_WRITE(sc, RT2560_CSR14, 0);
2523	rt2560_set_bssid(sc, ifp->if_broadcastaddr);
2524}
2525
2526static void
2527rt2560_scan_end(struct ieee80211com *ic)
2528{
2529	struct ifnet *ifp = ic->ic_ifp;
2530	struct rt2560_softc *sc = ifp->if_softc;
2531	struct ieee80211vap *vap = ic->ic_scan->ss_vap;
2532
2533	rt2560_enable_tsf_sync(sc);
2534	/* XXX keep local copy */
2535	rt2560_set_bssid(sc, vap->iv_bss->ni_bssid);
2536}
2537
2538static int
2539rt2560_bbp_init(struct rt2560_softc *sc)
2540{
2541#define N(a)	(sizeof (a) / sizeof ((a)[0]))
2542	int i, ntries;
2543
2544	/* wait for BBP to be ready */
2545	for (ntries = 0; ntries < 100; ntries++) {
2546		if (rt2560_bbp_read(sc, RT2560_BBP_VERSION) != 0)
2547			break;
2548		DELAY(1);
2549	}
2550	if (ntries == 100) {
2551		device_printf(sc->sc_dev, "timeout waiting for BBP\n");
2552		return EIO;
2553	}
2554
2555	/* initialize BBP registers to default values */
2556	for (i = 0; i < N(rt2560_def_bbp); i++) {
2557		rt2560_bbp_write(sc, rt2560_def_bbp[i].reg,
2558		    rt2560_def_bbp[i].val);
2559	}
2560
2561	/* initialize BBP registers to values stored in EEPROM */
2562	for (i = 0; i < 16; i++) {
2563		if (sc->bbp_prom[i].reg == 0 && sc->bbp_prom[i].val == 0)
2564			break;
2565		rt2560_bbp_write(sc, sc->bbp_prom[i].reg, sc->bbp_prom[i].val);
2566	}
2567	rt2560_bbp_write(sc, 17, 0x48);	/* XXX restore bbp17 */
2568
2569	return 0;
2570#undef N
2571}
2572
2573static void
2574rt2560_set_txantenna(struct rt2560_softc *sc, int antenna)
2575{
2576	uint32_t tmp;
2577	uint8_t tx;
2578
2579	tx = rt2560_bbp_read(sc, RT2560_BBP_TX) & ~RT2560_BBP_ANTMASK;
2580	if (antenna == 1)
2581		tx |= RT2560_BBP_ANTA;
2582	else if (antenna == 2)
2583		tx |= RT2560_BBP_ANTB;
2584	else
2585		tx |= RT2560_BBP_DIVERSITY;
2586
2587	/* need to force I/Q flip for RF 2525e, 2526 and 5222 */
2588	if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526 ||
2589	    sc->rf_rev == RT2560_RF_5222)
2590		tx |= RT2560_BBP_FLIPIQ;
2591
2592	rt2560_bbp_write(sc, RT2560_BBP_TX, tx);
2593
2594	/* update values for CCK and OFDM in BBPCSR1 */
2595	tmp = RAL_READ(sc, RT2560_BBPCSR1) & ~0x00070007;
2596	tmp |= (tx & 0x7) << 16 | (tx & 0x7);
2597	RAL_WRITE(sc, RT2560_BBPCSR1, tmp);
2598}
2599
2600static void
2601rt2560_set_rxantenna(struct rt2560_softc *sc, int antenna)
2602{
2603	uint8_t rx;
2604
2605	rx = rt2560_bbp_read(sc, RT2560_BBP_RX) & ~RT2560_BBP_ANTMASK;
2606	if (antenna == 1)
2607		rx |= RT2560_BBP_ANTA;
2608	else if (antenna == 2)
2609		rx |= RT2560_BBP_ANTB;
2610	else
2611		rx |= RT2560_BBP_DIVERSITY;
2612
2613	/* need to force no I/Q flip for RF 2525e and 2526 */
2614	if (sc->rf_rev == RT2560_RF_2525E || sc->rf_rev == RT2560_RF_2526)
2615		rx &= ~RT2560_BBP_FLIPIQ;
2616
2617	rt2560_bbp_write(sc, RT2560_BBP_RX, rx);
2618}
2619
2620static void
2621rt2560_init_locked(struct rt2560_softc *sc)
2622{
2623#define N(a)	(sizeof (a) / sizeof ((a)[0]))
2624	struct ifnet *ifp = sc->sc_ifp;
2625	struct ieee80211com *ic = ifp->if_l2com;
2626	uint32_t tmp;
2627	int i;
2628
2629	RAL_LOCK_ASSERT(sc);
2630
2631	rt2560_stop_locked(sc);
2632
2633	/* setup tx rings */
2634	tmp = RT2560_PRIO_RING_COUNT << 24 |
2635	      RT2560_ATIM_RING_COUNT << 16 |
2636	      RT2560_TX_RING_COUNT   <<  8 |
2637	      RT2560_TX_DESC_SIZE;
2638
2639	/* rings must be initialized in this exact order */
2640	RAL_WRITE(sc, RT2560_TXCSR2, tmp);
2641	RAL_WRITE(sc, RT2560_TXCSR3, sc->txq.physaddr);
2642	RAL_WRITE(sc, RT2560_TXCSR5, sc->prioq.physaddr);
2643	RAL_WRITE(sc, RT2560_TXCSR4, sc->atimq.physaddr);
2644	RAL_WRITE(sc, RT2560_TXCSR6, sc->bcnq.physaddr);
2645
2646	/* setup rx ring */
2647	tmp = RT2560_RX_RING_COUNT << 8 | RT2560_RX_DESC_SIZE;
2648
2649	RAL_WRITE(sc, RT2560_RXCSR1, tmp);
2650	RAL_WRITE(sc, RT2560_RXCSR2, sc->rxq.physaddr);
2651
2652	/* initialize MAC registers to default values */
2653	for (i = 0; i < N(rt2560_def_mac); i++)
2654		RAL_WRITE(sc, rt2560_def_mac[i].reg, rt2560_def_mac[i].val);
2655
2656	rt2560_set_macaddr(sc, IF_LLADDR(ifp));
2657
2658	/* set basic rate set (will be updated later) */
2659	RAL_WRITE(sc, RT2560_ARSP_PLCP_1, 0x153);
2660
2661	rt2560_update_slot(ifp);
2662	rt2560_update_plcp(sc);
2663	rt2560_update_led(sc, 0, 0);
2664
2665	RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2666	RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY);
2667
2668	if (rt2560_bbp_init(sc) != 0) {
2669		rt2560_stop_locked(sc);
2670		return;
2671	}
2672
2673	rt2560_set_txantenna(sc, sc->tx_ant);
2674	rt2560_set_rxantenna(sc, sc->rx_ant);
2675
2676	/* set default BSS channel */
2677	rt2560_set_chan(sc, ic->ic_curchan);
2678
2679	/* kick Rx */
2680	tmp = RT2560_DROP_PHY_ERROR | RT2560_DROP_CRC_ERROR;
2681	if (ic->ic_opmode != IEEE80211_M_MONITOR) {
2682		tmp |= RT2560_DROP_CTL | RT2560_DROP_VERSION_ERROR;
2683		if (ic->ic_opmode != IEEE80211_M_HOSTAP &&
2684		    ic->ic_opmode != IEEE80211_M_MBSS)
2685			tmp |= RT2560_DROP_TODS;
2686		if (!(ifp->if_flags & IFF_PROMISC))
2687			tmp |= RT2560_DROP_NOT_TO_ME;
2688	}
2689	RAL_WRITE(sc, RT2560_RXCSR0, tmp);
2690
2691	/* clear old FCS and Rx FIFO errors */
2692	RAL_READ(sc, RT2560_CNT0);
2693	RAL_READ(sc, RT2560_CNT4);
2694
2695	/* clear any pending interrupts */
2696	RAL_WRITE(sc, RT2560_CSR7, 0xffffffff);
2697
2698	/* enable interrupts */
2699	RAL_WRITE(sc, RT2560_CSR8, RT2560_INTR_MASK);
2700
2701	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
2702	ifp->if_drv_flags |= IFF_DRV_RUNNING;
2703
2704	callout_reset(&sc->watchdog_ch, hz, rt2560_watchdog, sc);
2705#undef N
2706}
2707
2708static void
2709rt2560_init(void *priv)
2710{
2711	struct rt2560_softc *sc = priv;
2712	struct ifnet *ifp = sc->sc_ifp;
2713	struct ieee80211com *ic = ifp->if_l2com;
2714
2715	RAL_LOCK(sc);
2716	rt2560_init_locked(sc);
2717	RAL_UNLOCK(sc);
2718
2719	if (ifp->if_drv_flags & IFF_DRV_RUNNING)
2720		ieee80211_start_all(ic);		/* start all vap's */
2721}
2722
2723static void
2724rt2560_stop_locked(struct rt2560_softc *sc)
2725{
2726	struct ifnet *ifp = sc->sc_ifp;
2727	volatile int *flags = &sc->sc_flags;
2728
2729	RAL_LOCK_ASSERT(sc);
2730
2731	while (*flags & RT2560_F_INPUT_RUNNING)
2732		msleep(sc, &sc->sc_mtx, 0, "ralrunning", hz/10);
2733
2734	callout_stop(&sc->watchdog_ch);
2735	sc->sc_tx_timer = 0;
2736
2737	if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
2738		ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
2739
2740		/* abort Tx */
2741		RAL_WRITE(sc, RT2560_TXCSR0, RT2560_ABORT_TX);
2742
2743		/* disable Rx */
2744		RAL_WRITE(sc, RT2560_RXCSR0, RT2560_DISABLE_RX);
2745
2746		/* reset ASIC (imply reset BBP) */
2747		RAL_WRITE(sc, RT2560_CSR1, RT2560_RESET_ASIC);
2748		RAL_WRITE(sc, RT2560_CSR1, 0);
2749
2750		/* disable interrupts */
2751		RAL_WRITE(sc, RT2560_CSR8, 0xffffffff);
2752
2753		/* reset Tx and Rx rings */
2754		rt2560_reset_tx_ring(sc, &sc->txq);
2755		rt2560_reset_tx_ring(sc, &sc->atimq);
2756		rt2560_reset_tx_ring(sc, &sc->prioq);
2757		rt2560_reset_tx_ring(sc, &sc->bcnq);
2758		rt2560_reset_rx_ring(sc, &sc->rxq);
2759	}
2760	sc->sc_flags &= ~(RT2560_F_PRIO_OACTIVE | RT2560_F_DATA_OACTIVE);
2761}
2762
2763void
2764rt2560_stop(void *arg)
2765{
2766	struct rt2560_softc *sc = arg;
2767
2768	RAL_LOCK(sc);
2769	rt2560_stop_locked(sc);
2770	RAL_UNLOCK(sc);
2771}
2772
2773static int
2774rt2560_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
2775	const struct ieee80211_bpf_params *params)
2776{
2777	struct ieee80211com *ic = ni->ni_ic;
2778	struct ifnet *ifp = ic->ic_ifp;
2779	struct rt2560_softc *sc = ifp->if_softc;
2780
2781	RAL_LOCK(sc);
2782
2783	/* prevent management frames from being sent if we're not ready */
2784	if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2785		RAL_UNLOCK(sc);
2786		m_freem(m);
2787		ieee80211_free_node(ni);
2788		return ENETDOWN;
2789	}
2790	if (sc->prioq.queued >= RT2560_PRIO_RING_COUNT) {
2791		ifp->if_drv_flags |= IFF_DRV_OACTIVE;
2792		sc->sc_flags |= RT2560_F_PRIO_OACTIVE;
2793		RAL_UNLOCK(sc);
2794		m_freem(m);
2795		ieee80211_free_node(ni);
2796		return ENOBUFS;		/* XXX */
2797	}
2798
2799	ifp->if_opackets++;
2800
2801	if (params == NULL) {
2802		/*
2803		 * Legacy path; interpret frame contents to decide
2804		 * precisely how to send the frame.
2805		 */
2806		if (rt2560_tx_mgt(sc, m, ni) != 0)
2807			goto bad;
2808	} else {
2809		/*
2810		 * Caller supplied explicit parameters to use in
2811		 * sending the frame.
2812		 */
2813		if (rt2560_tx_raw(sc, m, ni, params))
2814			goto bad;
2815	}
2816	sc->sc_tx_timer = 5;
2817
2818	RAL_UNLOCK(sc);
2819
2820	return 0;
2821bad:
2822	ifp->if_oerrors++;
2823	ieee80211_free_node(ni);
2824	RAL_UNLOCK(sc);
2825	return EIO;		/* XXX */
2826}
2827