xref: /freebsd/sys/dev/usb/wlan/if_rsu.c (revision edf8578117e8844e02c0121147f45e4609b30680)
1 /*	$OpenBSD: if_rsu.c,v 1.17 2013/04/15 09:23:01 mglocker Exp $	*/
2 
3 /*-
4  * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 #include <sys/cdefs.h>
19 /*
20  * Driver for Realtek RTL8188SU/RTL8191SU/RTL8192SU.
21  *
22  * TODO:
23  *   o tx a-mpdu
24  *   o hostap / ibss / mesh
25  *   o power-save operation
26  */
27 
28 #include "opt_wlan.h"
29 
30 #include <sys/param.h>
31 #include <sys/endian.h>
32 #include <sys/sockio.h>
33 #include <sys/malloc.h>
34 #include <sys/mbuf.h>
35 #include <sys/kernel.h>
36 #include <sys/socket.h>
37 #include <sys/systm.h>
38 #include <sys/conf.h>
39 #include <sys/bus.h>
40 #include <sys/firmware.h>
41 #include <sys/module.h>
42 
43 #include <net/bpf.h>
44 #include <net/if.h>
45 #include <net/if_var.h>
46 #include <net/if_arp.h>
47 #include <net/if_dl.h>
48 #include <net/if_media.h>
49 #include <net/if_types.h>
50 
51 #include <netinet/in.h>
52 #include <netinet/in_systm.h>
53 #include <netinet/in_var.h>
54 #include <netinet/if_ether.h>
55 #include <netinet/ip.h>
56 
57 #include <net80211/ieee80211_var.h>
58 #include <net80211/ieee80211_regdomain.h>
59 #include <net80211/ieee80211_radiotap.h>
60 
61 #include <dev/usb/usb.h>
62 #include <dev/usb/usbdi.h>
63 #include "usbdevs.h"
64 
65 #include <dev/rtwn/if_rtwn_ridx.h>	/* XXX */
66 #include <dev/usb/wlan/if_rsureg.h>
67 
68 #define RSU_RATE_IS_CCK	RTWN_RATE_IS_CCK
69 
70 #ifdef USB_DEBUG
71 static int rsu_debug = 0;
72 SYSCTL_NODE(_hw_usb, OID_AUTO, rsu, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
73     "USB rsu");
74 SYSCTL_INT(_hw_usb_rsu, OID_AUTO, debug, CTLFLAG_RWTUN, &rsu_debug, 0,
75     "Debug level");
76 #define	RSU_DPRINTF(_sc, _flg, ...)					\
77 	do								\
78 		if (((_flg) == (RSU_DEBUG_ANY)) || (rsu_debug & (_flg))) \
79 			device_printf((_sc)->sc_dev, __VA_ARGS__);	\
80 	while (0)
81 #else
82 #define	RSU_DPRINTF(_sc, _flg, ...)
83 #endif
84 
85 static int rsu_enable_11n = 1;
86 TUNABLE_INT("hw.usb.rsu.enable_11n", &rsu_enable_11n);
87 
88 #define	RSU_DEBUG_ANY		0xffffffff
89 #define	RSU_DEBUG_TX		0x00000001
90 #define	RSU_DEBUG_RX		0x00000002
91 #define	RSU_DEBUG_RESET		0x00000004
92 #define	RSU_DEBUG_CALIB		0x00000008
93 #define	RSU_DEBUG_STATE		0x00000010
94 #define	RSU_DEBUG_SCAN		0x00000020
95 #define	RSU_DEBUG_FWCMD		0x00000040
96 #define	RSU_DEBUG_TXDONE	0x00000080
97 #define	RSU_DEBUG_FW		0x00000100
98 #define	RSU_DEBUG_FWDBG		0x00000200
99 #define	RSU_DEBUG_AMPDU		0x00000400
100 #define	RSU_DEBUG_KEY		0x00000800
101 #define	RSU_DEBUG_USB		0x00001000
102 
103 static const STRUCT_USB_HOST_ID rsu_devs[] = {
104 #define	RSU_HT_NOT_SUPPORTED 0
105 #define	RSU_HT_SUPPORTED 1
106 #define RSU_DEV_HT(v,p)  { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, \
107 				   RSU_HT_SUPPORTED) }
108 #define RSU_DEV(v,p)     { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, \
109 				   RSU_HT_NOT_SUPPORTED) }
110 	RSU_DEV(ASUS,			RTL8192SU),
111 	RSU_DEV(AZUREWAVE,		RTL8192SU_4),
112 	RSU_DEV(SITECOMEU,		WLA1000),
113 	RSU_DEV_HT(ACCTON,		RTL8192SU),
114 	RSU_DEV_HT(ASUS,		USBN10),
115 	RSU_DEV_HT(AZUREWAVE,		RTL8192SU_1),
116 	RSU_DEV_HT(AZUREWAVE,		RTL8192SU_2),
117 	RSU_DEV_HT(AZUREWAVE,		RTL8192SU_3),
118 	RSU_DEV_HT(AZUREWAVE,		RTL8192SU_5),
119 	RSU_DEV_HT(BELKIN,		RTL8192SU_1),
120 	RSU_DEV_HT(BELKIN,		RTL8192SU_2),
121 	RSU_DEV_HT(BELKIN,		RTL8192SU_3),
122 	RSU_DEV_HT(CONCEPTRONIC2,	RTL8192SU_1),
123 	RSU_DEV_HT(CONCEPTRONIC2,	RTL8192SU_2),
124 	RSU_DEV_HT(CONCEPTRONIC2,	RTL8192SU_3),
125 	RSU_DEV_HT(COREGA,		RTL8192SU),
126 	RSU_DEV_HT(DLINK2,		DWA131A1),
127 	RSU_DEV_HT(DLINK2,		RTL8192SU_1),
128 	RSU_DEV_HT(DLINK2,		RTL8192SU_2),
129 	RSU_DEV_HT(EDIMAX,		RTL8192SU_1),
130 	RSU_DEV_HT(EDIMAX,		RTL8192SU_2),
131 	RSU_DEV_HT(EDIMAX,		EW7622UMN),
132 	RSU_DEV_HT(GUILLEMOT,		HWGUN54),
133 	RSU_DEV_HT(GUILLEMOT,		HWNUM300),
134 	RSU_DEV_HT(HAWKING,		RTL8192SU_1),
135 	RSU_DEV_HT(HAWKING,		RTL8192SU_2),
136 	RSU_DEV_HT(PLANEX2,		GWUSNANO),
137 	RSU_DEV_HT(REALTEK,		RTL8171),
138 	RSU_DEV_HT(REALTEK,		RTL8172),
139 	RSU_DEV_HT(REALTEK,		RTL8173),
140 	RSU_DEV_HT(REALTEK,		RTL8174),
141 	RSU_DEV_HT(REALTEK,		RTL8192SU),
142 	RSU_DEV_HT(REALTEK,		RTL8712),
143 	RSU_DEV_HT(REALTEK,		RTL8713),
144 	RSU_DEV_HT(SENAO,		RTL8192SU_1),
145 	RSU_DEV_HT(SENAO,		RTL8192SU_2),
146 	RSU_DEV_HT(SITECOMEU,		WL349V1),
147 	RSU_DEV_HT(SITECOMEU,		WL353),
148 	RSU_DEV_HT(SWEEX2,		LW154),
149 	RSU_DEV_HT(TRENDNET,		TEW646UBH),
150 #undef RSU_DEV_HT
151 #undef RSU_DEV
152 };
153 
154 static device_probe_t   rsu_match;
155 static device_attach_t  rsu_attach;
156 static device_detach_t  rsu_detach;
157 static usb_callback_t   rsu_bulk_tx_callback_be_bk;
158 static usb_callback_t   rsu_bulk_tx_callback_vi_vo;
159 static usb_callback_t   rsu_bulk_tx_callback_h2c;
160 static usb_callback_t   rsu_bulk_rx_callback;
161 static usb_error_t	rsu_do_request(struct rsu_softc *,
162 			    struct usb_device_request *, void *);
163 static struct ieee80211vap *
164 		rsu_vap_create(struct ieee80211com *, const char name[IFNAMSIZ],
165 		    int, enum ieee80211_opmode, int,
166 		    const uint8_t bssid[IEEE80211_ADDR_LEN],
167 		    const uint8_t mac[IEEE80211_ADDR_LEN]);
168 static void	rsu_vap_delete(struct ieee80211vap *);
169 static void	rsu_scan_start(struct ieee80211com *);
170 static void	rsu_scan_end(struct ieee80211com *);
171 static void	rsu_getradiocaps(struct ieee80211com *, int, int *,
172 		    struct ieee80211_channel[]);
173 static void	rsu_set_channel(struct ieee80211com *);
174 static void	rsu_scan_curchan(struct ieee80211_scan_state *, unsigned long);
175 static void	rsu_scan_mindwell(struct ieee80211_scan_state *);
176 static void	rsu_update_promisc(struct ieee80211com *);
177 static uint8_t	rsu_get_multi_pos(const uint8_t[]);
178 static void	rsu_set_multi(struct rsu_softc *);
179 static void	rsu_update_mcast(struct ieee80211com *);
180 static int	rsu_alloc_rx_list(struct rsu_softc *);
181 static void	rsu_free_rx_list(struct rsu_softc *);
182 static int	rsu_alloc_tx_list(struct rsu_softc *);
183 static void	rsu_free_tx_list(struct rsu_softc *);
184 static void	rsu_free_list(struct rsu_softc *, struct rsu_data [], int);
185 static struct rsu_data *_rsu_getbuf(struct rsu_softc *);
186 static struct rsu_data *rsu_getbuf(struct rsu_softc *);
187 static void	rsu_freebuf(struct rsu_softc *, struct rsu_data *);
188 static int	rsu_write_region_1(struct rsu_softc *, uint16_t, uint8_t *,
189 		    int);
190 static void	rsu_write_1(struct rsu_softc *, uint16_t, uint8_t);
191 static void	rsu_write_2(struct rsu_softc *, uint16_t, uint16_t);
192 static void	rsu_write_4(struct rsu_softc *, uint16_t, uint32_t);
193 static int	rsu_read_region_1(struct rsu_softc *, uint16_t, uint8_t *,
194 		    int);
195 static uint8_t	rsu_read_1(struct rsu_softc *, uint16_t);
196 static uint16_t	rsu_read_2(struct rsu_softc *, uint16_t);
197 static uint32_t	rsu_read_4(struct rsu_softc *, uint16_t);
198 static int	rsu_fw_iocmd(struct rsu_softc *, uint32_t);
199 static uint8_t	rsu_efuse_read_1(struct rsu_softc *, uint16_t);
200 static int	rsu_read_rom(struct rsu_softc *);
201 static int	rsu_fw_cmd(struct rsu_softc *, uint8_t, void *, int);
202 static void	rsu_calib_task(void *, int);
203 static void	rsu_tx_task(void *, int);
204 static void	rsu_set_led(struct rsu_softc *, int);
205 static int	rsu_monitor_newstate(struct ieee80211vap *,
206 		    enum ieee80211_state, int);
207 static int	rsu_newstate(struct ieee80211vap *, enum ieee80211_state, int);
208 static int	rsu_key_alloc(struct ieee80211vap *, struct ieee80211_key *,
209 		    ieee80211_keyix *, ieee80211_keyix *);
210 static int	rsu_process_key(struct ieee80211vap *,
211 		    const struct ieee80211_key *, int);
212 static int	rsu_key_set(struct ieee80211vap *,
213 		    const struct ieee80211_key *);
214 static int	rsu_key_delete(struct ieee80211vap *,
215 		    const struct ieee80211_key *);
216 static int	rsu_cam_read(struct rsu_softc *, uint8_t, uint32_t *);
217 static void	rsu_cam_write(struct rsu_softc *, uint8_t, uint32_t);
218 static int	rsu_key_check(struct rsu_softc *, ieee80211_keyix, int);
219 static uint8_t	rsu_crypto_mode(struct rsu_softc *, u_int, int);
220 static int	rsu_set_key_group(struct rsu_softc *,
221 		    const struct ieee80211_key *);
222 static int	rsu_set_key_pair(struct rsu_softc *,
223 		    const struct ieee80211_key *);
224 static int	rsu_reinit_static_keys(struct rsu_softc *);
225 static int	rsu_delete_key(struct rsu_softc *sc, ieee80211_keyix);
226 static void	rsu_delete_key_pair_cb(void *, int);
227 static int	rsu_site_survey(struct rsu_softc *,
228 		    struct ieee80211_scan_ssid *);
229 static int	rsu_join_bss(struct rsu_softc *, struct ieee80211_node *);
230 static int	rsu_disconnect(struct rsu_softc *);
231 static int	rsu_hwrssi_to_rssi(struct rsu_softc *, int hw_rssi);
232 static void	rsu_event_survey(struct rsu_softc *, uint8_t *, int);
233 static void	rsu_event_join_bss(struct rsu_softc *, uint8_t *, int);
234 static void	rsu_rx_event(struct rsu_softc *, uint8_t, uint8_t *, int);
235 static void	rsu_rx_multi_event(struct rsu_softc *, uint8_t *, int);
236 static int8_t	rsu_get_rssi(struct rsu_softc *, int, void *);
237 static struct mbuf * rsu_rx_copy_to_mbuf(struct rsu_softc *,
238 		    struct r92s_rx_stat *, int);
239 static uint32_t	rsu_get_tsf_low(struct rsu_softc *);
240 static uint32_t	rsu_get_tsf_high(struct rsu_softc *);
241 static struct ieee80211_node * rsu_rx_frame(struct rsu_softc *, struct mbuf *);
242 static struct mbuf * rsu_rx_multi_frame(struct rsu_softc *, uint8_t *, int);
243 static struct mbuf *
244 		rsu_rxeof(struct usb_xfer *, struct rsu_data *);
245 static void	rsu_txeof(struct usb_xfer *, struct rsu_data *);
246 static int	rsu_raw_xmit(struct ieee80211_node *, struct mbuf *,
247 		    const struct ieee80211_bpf_params *);
248 static void	rsu_rxfilter_init(struct rsu_softc *);
249 static void	rsu_rxfilter_set(struct rsu_softc *, uint32_t, uint32_t);
250 static void	rsu_rxfilter_refresh(struct rsu_softc *);
251 static int	rsu_init(struct rsu_softc *);
252 static int	rsu_tx_start(struct rsu_softc *, struct ieee80211_node *,
253 		    struct mbuf *, struct rsu_data *);
254 static int	rsu_transmit(struct ieee80211com *, struct mbuf *);
255 static void	rsu_start(struct rsu_softc *);
256 static void	_rsu_start(struct rsu_softc *);
257 static int	rsu_ioctl_net(struct ieee80211com *, u_long, void *);
258 static void	rsu_parent(struct ieee80211com *);
259 static void	rsu_stop(struct rsu_softc *);
260 static void	rsu_ms_delay(struct rsu_softc *, int);
261 
262 static device_method_t rsu_methods[] = {
263 	DEVMETHOD(device_probe,		rsu_match),
264 	DEVMETHOD(device_attach,	rsu_attach),
265 	DEVMETHOD(device_detach,	rsu_detach),
266 
267 	DEVMETHOD_END
268 };
269 
270 static driver_t rsu_driver = {
271 	.name = "rsu",
272 	.methods = rsu_methods,
273 	.size = sizeof(struct rsu_softc)
274 };
275 
276 DRIVER_MODULE(rsu, uhub, rsu_driver, NULL, NULL);
277 MODULE_DEPEND(rsu, wlan, 1, 1, 1);
278 MODULE_DEPEND(rsu, usb, 1, 1, 1);
279 MODULE_DEPEND(rsu, firmware, 1, 1, 1);
280 MODULE_VERSION(rsu, 1);
281 USB_PNP_HOST_INFO(rsu_devs);
282 
283 static uint8_t rsu_wme_ac_xfer_map[4] = {
284 	[WME_AC_BE] = RSU_BULK_TX_BE_BK,
285 	[WME_AC_BK] = RSU_BULK_TX_BE_BK,
286 	[WME_AC_VI] = RSU_BULK_TX_VI_VO,
287 	[WME_AC_VO] = RSU_BULK_TX_VI_VO,
288 };
289 
290 /* XXX hard-coded */
291 #define	RSU_H2C_ENDPOINT	3
292 
293 static const struct usb_config rsu_config[RSU_N_TRANSFER] = {
294 	[RSU_BULK_RX] = {
295 		.type = UE_BULK,
296 		.endpoint = UE_ADDR_ANY,
297 		.direction = UE_DIR_IN,
298 		.bufsize = RSU_RXBUFSZ,
299 		.flags = {
300 			.pipe_bof = 1,
301 			.short_xfer_ok = 1
302 		},
303 		.callback = rsu_bulk_rx_callback
304 	},
305 	[RSU_BULK_TX_BE_BK] = {
306 		.type = UE_BULK,
307 		.endpoint = 0x06,
308 		.direction = UE_DIR_OUT,
309 		.bufsize = RSU_TXBUFSZ,
310 		.flags = {
311 			.ext_buffer = 1,
312 			.pipe_bof = 1,
313 			.force_short_xfer = 1
314 		},
315 		.callback = rsu_bulk_tx_callback_be_bk,
316 		.timeout = RSU_TX_TIMEOUT
317 	},
318 	[RSU_BULK_TX_VI_VO] = {
319 		.type = UE_BULK,
320 		.endpoint = 0x04,
321 		.direction = UE_DIR_OUT,
322 		.bufsize = RSU_TXBUFSZ,
323 		.flags = {
324 			.ext_buffer = 1,
325 			.pipe_bof = 1,
326 			.force_short_xfer = 1
327 		},
328 		.callback = rsu_bulk_tx_callback_vi_vo,
329 		.timeout = RSU_TX_TIMEOUT
330 	},
331 	[RSU_BULK_TX_H2C] = {
332 		.type = UE_BULK,
333 		.endpoint = 0x0d,
334 		.direction = UE_DIR_OUT,
335 		.bufsize = RSU_TXBUFSZ,
336 		.flags = {
337 			.ext_buffer = 1,
338 			.pipe_bof = 1,
339 			.short_xfer_ok = 1
340 		},
341 		.callback = rsu_bulk_tx_callback_h2c,
342 		.timeout = RSU_TX_TIMEOUT
343 	},
344 };
345 
346 static int
347 rsu_match(device_t self)
348 {
349 	struct usb_attach_arg *uaa = device_get_ivars(self);
350 
351 	if (uaa->usb_mode != USB_MODE_HOST ||
352 	    uaa->info.bIfaceIndex != 0 ||
353 	    uaa->info.bConfigIndex != 0)
354 		return (ENXIO);
355 
356 	return (usbd_lookup_id_by_uaa(rsu_devs, sizeof(rsu_devs), uaa));
357 }
358 
359 static int
360 rsu_send_mgmt(struct ieee80211_node *ni, int type, int arg)
361 {
362 
363 	return (ENOTSUP);
364 }
365 
366 static void
367 rsu_update_chw(struct ieee80211com *ic)
368 {
369 
370 }
371 
372 /*
373  * notification from net80211 that it'd like to do A-MPDU on the given TID.
374  *
375  * Note: this actually hangs traffic at the present moment, so don't use it.
376  * The firmware debug does indiciate it's sending and establishing a TX AMPDU
377  * session, but then no traffic flows.
378  */
379 static int
380 rsu_ampdu_enable(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
381 {
382 #if 0
383 	struct rsu_softc *sc = ni->ni_ic->ic_softc;
384 	struct r92s_add_ba_req req;
385 
386 	/* Don't enable if it's requested or running */
387 	if (IEEE80211_AMPDU_REQUESTED(tap))
388 		return (0);
389 	if (IEEE80211_AMPDU_RUNNING(tap))
390 		return (0);
391 
392 	/* We've decided to send addba; so send it */
393 	req.tid = htole32(tap->txa_tid);
394 
395 	/* Attempt net80211 state */
396 	if (ieee80211_ampdu_tx_request_ext(ni, tap->txa_tid) != 1)
397 		return (0);
398 
399 	/* Send the firmware command */
400 	RSU_DPRINTF(sc, RSU_DEBUG_AMPDU, "%s: establishing AMPDU TX for TID %d\n",
401 	    __func__,
402 	    tap->txa_tid);
403 
404 	RSU_LOCK(sc);
405 	if (rsu_fw_cmd(sc, R92S_CMD_ADDBA_REQ, &req, sizeof(req)) != 1) {
406 		RSU_UNLOCK(sc);
407 		/* Mark failure */
408 		(void) ieee80211_ampdu_tx_request_active_ext(ni, tap->txa_tid, 0);
409 		return (0);
410 	}
411 	RSU_UNLOCK(sc);
412 
413 	/* Mark success; we don't get any further notifications */
414 	(void) ieee80211_ampdu_tx_request_active_ext(ni, tap->txa_tid, 1);
415 #endif
416 	/* Return 0, we're driving this ourselves */
417 	return (0);
418 }
419 
420 static int
421 rsu_wme_update(struct ieee80211com *ic)
422 {
423 
424 	/* Firmware handles this; not our problem */
425 	return (0);
426 }
427 
428 static int
429 rsu_attach(device_t self)
430 {
431 	struct usb_attach_arg *uaa = device_get_ivars(self);
432 	struct rsu_softc *sc = device_get_softc(self);
433 	struct ieee80211com *ic = &sc->sc_ic;
434 	int error;
435 	uint8_t iface_index;
436 	struct usb_interface *iface;
437 	const char *rft;
438 
439 	device_set_usb_desc(self);
440 	sc->sc_udev = uaa->device;
441 	sc->sc_dev = self;
442 	sc->sc_rx_checksum_enable = 1;
443 	if (rsu_enable_11n)
444 		sc->sc_ht = !! (USB_GET_DRIVER_INFO(uaa) & RSU_HT_SUPPORTED);
445 
446 	/* Get number of endpoints */
447 	iface = usbd_get_iface(sc->sc_udev, 0);
448 	sc->sc_nendpoints = iface->idesc->bNumEndpoints;
449 
450 	/* Endpoints are hard-coded for now, so enforce 4-endpoint only */
451 	if (sc->sc_nendpoints != 4) {
452 		device_printf(sc->sc_dev,
453 		    "the driver currently only supports 4-endpoint devices\n");
454 		return (ENXIO);
455 	}
456 
457 	mtx_init(&sc->sc_mtx, device_get_nameunit(self), MTX_NETWORK_LOCK,
458 	    MTX_DEF);
459 	RSU_DELKEY_BMAP_LOCK_INIT(sc);
460 	TIMEOUT_TASK_INIT(taskqueue_thread, &sc->calib_task, 0,
461 	    rsu_calib_task, sc);
462 	TASK_INIT(&sc->del_key_task, 0, rsu_delete_key_pair_cb, sc);
463 	TASK_INIT(&sc->tx_task, 0, rsu_tx_task, sc);
464 	mbufq_init(&sc->sc_snd, ifqmaxlen);
465 
466 	/* Allocate Tx/Rx buffers. */
467 	error = rsu_alloc_rx_list(sc);
468 	if (error != 0) {
469 		device_printf(sc->sc_dev, "could not allocate Rx buffers\n");
470 		goto fail_usb;
471 	}
472 
473 	error = rsu_alloc_tx_list(sc);
474 	if (error != 0) {
475 		device_printf(sc->sc_dev, "could not allocate Tx buffers\n");
476 		rsu_free_rx_list(sc);
477 		goto fail_usb;
478 	}
479 
480 	iface_index = 0;
481 	error = usbd_transfer_setup(uaa->device, &iface_index, sc->sc_xfer,
482 	    rsu_config, RSU_N_TRANSFER, sc, &sc->sc_mtx);
483 	if (error) {
484 		device_printf(sc->sc_dev,
485 		    "could not allocate USB transfers, err=%s\n",
486 		    usbd_errstr(error));
487 		goto fail_usb;
488 	}
489 	RSU_LOCK(sc);
490 	/* Read chip revision. */
491 	sc->cut = MS(rsu_read_4(sc, R92S_PMC_FSM), R92S_PMC_FSM_CUT);
492 	if (sc->cut != 3)
493 		sc->cut = (sc->cut >> 1) + 1;
494 	error = rsu_read_rom(sc);
495 	RSU_UNLOCK(sc);
496 	if (error != 0) {
497 		device_printf(self, "could not read ROM\n");
498 		goto fail_rom;
499 	}
500 
501 	/* Figure out TX/RX streams */
502 	switch (sc->rom[84]) {
503 	case 0x0:
504 		sc->sc_rftype = RTL8712_RFCONFIG_1T1R;
505 		sc->sc_nrxstream = 1;
506 		sc->sc_ntxstream = 1;
507 		rft = "1T1R";
508 		break;
509 	case 0x1:
510 		sc->sc_rftype = RTL8712_RFCONFIG_1T2R;
511 		sc->sc_nrxstream = 2;
512 		sc->sc_ntxstream = 1;
513 		rft = "1T2R";
514 		break;
515 	case 0x2:
516 		sc->sc_rftype = RTL8712_RFCONFIG_2T2R;
517 		sc->sc_nrxstream = 2;
518 		sc->sc_ntxstream = 2;
519 		rft = "2T2R";
520 		break;
521 	case 0x3:	/* "green" NIC */
522 		sc->sc_rftype = RTL8712_RFCONFIG_1T2R;
523 		sc->sc_nrxstream = 2;
524 		sc->sc_ntxstream = 1;
525 		rft = "1T2R ('green')";
526 		break;
527 	default:
528 		device_printf(sc->sc_dev,
529 		    "%s: unknown board type (rfconfig=0x%02x)\n",
530 		    __func__,
531 		    sc->rom[84]);
532 		goto fail_rom;
533 	}
534 
535 	IEEE80211_ADDR_COPY(ic->ic_macaddr, &sc->rom[0x12]);
536 	device_printf(self, "MAC/BB RTL8712 cut %d %s\n", sc->cut, rft);
537 
538 	ic->ic_softc = sc;
539 	ic->ic_name = device_get_nameunit(self);
540 	ic->ic_phytype = IEEE80211_T_OFDM;	/* Not only, but not used. */
541 	ic->ic_opmode = IEEE80211_M_STA;	/* Default to BSS mode. */
542 
543 	/* Set device capabilities. */
544 	ic->ic_caps =
545 	    IEEE80211_C_STA |		/* station mode */
546 	    IEEE80211_C_MONITOR |	/* monitor mode supported */
547 #if 0
548 	    IEEE80211_C_BGSCAN |	/* Background scan. */
549 #endif
550 	    IEEE80211_C_SHPREAMBLE |	/* Short preamble supported. */
551 	    IEEE80211_C_WME |		/* WME/QoS */
552 	    IEEE80211_C_SHSLOT |	/* Short slot time supported. */
553 	    IEEE80211_C_WPA;		/* WPA/RSN. */
554 
555 	ic->ic_cryptocaps =
556 	    IEEE80211_CRYPTO_WEP |
557 	    IEEE80211_CRYPTO_TKIP |
558 	    IEEE80211_CRYPTO_AES_CCM;
559 
560 	/* Check if HT support is present. */
561 	if (sc->sc_ht) {
562 		device_printf(sc->sc_dev, "%s: enabling 11n\n", __func__);
563 
564 		/* Enable basic HT */
565 		ic->ic_htcaps = IEEE80211_HTC_HT |
566 #if 0
567 		    IEEE80211_HTC_AMPDU |
568 #endif
569 		    IEEE80211_HTC_AMSDU |
570 		    IEEE80211_HTCAP_MAXAMSDU_3839 |
571 		    IEEE80211_HTCAP_SMPS_OFF;
572 		ic->ic_htcaps |= IEEE80211_HTCAP_CHWIDTH40;
573 
574 		/* set number of spatial streams */
575 		ic->ic_txstream = sc->sc_ntxstream;
576 		ic->ic_rxstream = sc->sc_nrxstream;
577 	}
578 	ic->ic_flags_ext |= IEEE80211_FEXT_SCAN_OFFLOAD;
579 
580 	rsu_getradiocaps(ic, IEEE80211_CHAN_MAX, &ic->ic_nchans,
581 	    ic->ic_channels);
582 
583 	ieee80211_ifattach(ic);
584 	ic->ic_raw_xmit = rsu_raw_xmit;
585 	ic->ic_scan_start = rsu_scan_start;
586 	ic->ic_scan_end = rsu_scan_end;
587 	ic->ic_getradiocaps = rsu_getradiocaps;
588 	ic->ic_set_channel = rsu_set_channel;
589 	ic->ic_scan_curchan = rsu_scan_curchan;
590 	ic->ic_scan_mindwell = rsu_scan_mindwell;
591 	ic->ic_vap_create = rsu_vap_create;
592 	ic->ic_vap_delete = rsu_vap_delete;
593 	ic->ic_update_promisc = rsu_update_promisc;
594 	ic->ic_update_mcast = rsu_update_mcast;
595 	ic->ic_ioctl = rsu_ioctl_net;
596 	ic->ic_parent = rsu_parent;
597 	ic->ic_transmit = rsu_transmit;
598 	ic->ic_send_mgmt = rsu_send_mgmt;
599 	ic->ic_update_chw = rsu_update_chw;
600 	ic->ic_ampdu_enable = rsu_ampdu_enable;
601 	ic->ic_wme.wme_update = rsu_wme_update;
602 
603 	ieee80211_radiotap_attach(ic, &sc->sc_txtap.wt_ihdr,
604 	    sizeof(sc->sc_txtap), RSU_TX_RADIOTAP_PRESENT,
605 	    &sc->sc_rxtap.wr_ihdr, sizeof(sc->sc_rxtap),
606 	    RSU_RX_RADIOTAP_PRESENT);
607 
608 	if (bootverbose)
609 		ieee80211_announce(ic);
610 
611 	return (0);
612 
613 fail_rom:
614 	usbd_transfer_unsetup(sc->sc_xfer, RSU_N_TRANSFER);
615 fail_usb:
616 	mtx_destroy(&sc->sc_mtx);
617 	return (ENXIO);
618 }
619 
620 static int
621 rsu_detach(device_t self)
622 {
623 	struct rsu_softc *sc = device_get_softc(self);
624 	struct ieee80211com *ic = &sc->sc_ic;
625 
626 	rsu_stop(sc);
627 
628 	usbd_transfer_unsetup(sc->sc_xfer, RSU_N_TRANSFER);
629 
630 	/*
631 	 * Free buffers /before/ we detach from net80211, else node
632 	 * references to destroyed vaps will lead to a panic.
633 	 */
634 	/* Free Tx/Rx buffers. */
635 	RSU_LOCK(sc);
636 	rsu_free_tx_list(sc);
637 	rsu_free_rx_list(sc);
638 	RSU_UNLOCK(sc);
639 
640 	/* Frames are freed; detach from net80211 */
641 	ieee80211_ifdetach(ic);
642 
643 	taskqueue_drain_timeout(taskqueue_thread, &sc->calib_task);
644 	taskqueue_drain(taskqueue_thread, &sc->del_key_task);
645 	taskqueue_drain(taskqueue_thread, &sc->tx_task);
646 
647 	RSU_DELKEY_BMAP_LOCK_DESTROY(sc);
648 	mtx_destroy(&sc->sc_mtx);
649 
650 	return (0);
651 }
652 
653 static usb_error_t
654 rsu_do_request(struct rsu_softc *sc, struct usb_device_request *req,
655     void *data)
656 {
657 	usb_error_t err;
658 	int ntries = 10;
659 
660 	RSU_ASSERT_LOCKED(sc);
661 
662 	while (ntries--) {
663 		err = usbd_do_request_flags(sc->sc_udev, &sc->sc_mtx,
664 		    req, data, 0, NULL, 250 /* ms */);
665 		if (err == 0 || err == USB_ERR_NOT_CONFIGURED)
666 			break;
667 		RSU_DPRINTF(sc, RSU_DEBUG_USB,
668 		    "Control request failed, %s (retries left: %d)\n",
669 		    usbd_errstr(err), ntries);
670 		rsu_ms_delay(sc, 10);
671         }
672 
673         return (err);
674 }
675 
676 static struct ieee80211vap *
677 rsu_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
678     enum ieee80211_opmode opmode, int flags,
679     const uint8_t bssid[IEEE80211_ADDR_LEN],
680     const uint8_t mac[IEEE80211_ADDR_LEN])
681 {
682 	struct rsu_softc *sc = ic->ic_softc;
683 	struct rsu_vap *uvp;
684 	struct ieee80211vap *vap;
685 	if_t ifp;
686 
687 	if (!TAILQ_EMPTY(&ic->ic_vaps))         /* only one at a time */
688 		return (NULL);
689 
690 	uvp =  malloc(sizeof(struct rsu_vap), M_80211_VAP, M_WAITOK | M_ZERO);
691 	vap = &uvp->vap;
692 
693 	if (ieee80211_vap_setup(ic, vap, name, unit, opmode,
694 	    flags, bssid) != 0) {
695 		/* out of memory */
696 		free(uvp, M_80211_VAP);
697 		return (NULL);
698 	}
699 
700 	ifp = vap->iv_ifp;
701 	if_setcapabilities(ifp, IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
702 	RSU_LOCK(sc);
703 	if (sc->sc_rx_checksum_enable)
704 		if_setcapenablebit(ifp, IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6, 0);
705 	RSU_UNLOCK(sc);
706 
707 	/* override state transition machine */
708 	uvp->newstate = vap->iv_newstate;
709 	if (opmode == IEEE80211_M_MONITOR)
710 		vap->iv_newstate = rsu_monitor_newstate;
711 	else
712 		vap->iv_newstate = rsu_newstate;
713 	vap->iv_key_alloc = rsu_key_alloc;
714 	vap->iv_key_set = rsu_key_set;
715 	vap->iv_key_delete = rsu_key_delete;
716 
717 	/* Limits from the r92su driver */
718 	vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_16;
719 	vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_32K;
720 
721 	/* complete setup */
722 	ieee80211_vap_attach(vap, ieee80211_media_change,
723 	    ieee80211_media_status, mac);
724 	ic->ic_opmode = opmode;
725 
726 	return (vap);
727 }
728 
729 static void
730 rsu_vap_delete(struct ieee80211vap *vap)
731 {
732 	struct rsu_vap *uvp = RSU_VAP(vap);
733 
734 	ieee80211_vap_detach(vap);
735 	free(uvp, M_80211_VAP);
736 }
737 
738 static void
739 rsu_scan_start(struct ieee80211com *ic)
740 {
741 	struct rsu_softc *sc = ic->ic_softc;
742 	struct ieee80211_scan_state *ss = ic->ic_scan;
743 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
744 	int error;
745 
746 	/* Scanning is done by the firmware. */
747 	RSU_LOCK(sc);
748 	sc->sc_active_scan = !!(ss->ss_flags & IEEE80211_SCAN_ACTIVE);
749 	/* XXX TODO: force awake if in network-sleep? */
750 	error = rsu_site_survey(sc, ss->ss_nssid > 0 ? &ss->ss_ssid[0] : NULL);
751 	RSU_UNLOCK(sc);
752 	if (error != 0) {
753 		device_printf(sc->sc_dev,
754 		    "could not send site survey command\n");
755 		ieee80211_cancel_scan(vap);
756 	}
757 }
758 
759 static void
760 rsu_scan_end(struct ieee80211com *ic)
761 {
762 	/* Nothing to do here. */
763 }
764 
765 static void
766 rsu_getradiocaps(struct ieee80211com *ic,
767     int maxchans, int *nchans, struct ieee80211_channel chans[])
768 {
769 	struct rsu_softc *sc = ic->ic_softc;
770 	uint8_t bands[IEEE80211_MODE_BYTES];
771 
772 	/* Set supported .11b and .11g rates. */
773 	memset(bands, 0, sizeof(bands));
774 	setbit(bands, IEEE80211_MODE_11B);
775 	setbit(bands, IEEE80211_MODE_11G);
776 	if (sc->sc_ht)
777 		setbit(bands, IEEE80211_MODE_11NG);
778 	ieee80211_add_channels_default_2ghz(chans, maxchans, nchans,
779 	    bands, (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) ?
780 		NET80211_CBW_FLAG_HT40 : 0);
781 }
782 
783 static void
784 rsu_set_channel(struct ieee80211com *ic)
785 {
786 	struct rsu_softc *sc = ic->ic_softc;
787 
788 	/*
789 	 * Only need to set the channel in Monitor mode. AP scanning and auth
790 	 * are already taken care of by their respective firmware commands.
791 	 */
792 	if (ic->ic_opmode == IEEE80211_M_MONITOR) {
793 		struct r92s_set_channel cmd;
794 		int error;
795 
796 		cmd.channel = IEEE80211_CHAN2IEEE(ic->ic_curchan);
797 
798 		RSU_LOCK(sc);
799 		error = rsu_fw_cmd(sc, R92S_CMD_SET_CHANNEL, &cmd,
800 		    sizeof(cmd));
801 		if (error != 0) {
802 			device_printf(sc->sc_dev,
803 			    "%s: error %d setting channel\n", __func__,
804 			    error);
805 		}
806 		RSU_UNLOCK(sc);
807 	}
808 }
809 
810 static void
811 rsu_scan_curchan(struct ieee80211_scan_state *ss, unsigned long maxdwell)
812 {
813 	/* Scan is done in rsu_scan_start(). */
814 }
815 
816 /**
817  * Called by the net80211 framework to indicate
818  * the minimum dwell time has been met, terminate the scan.
819  * We don't actually terminate the scan as the firmware will notify
820  * us when it's finished and we have no way to interrupt it.
821  */
822 static void
823 rsu_scan_mindwell(struct ieee80211_scan_state *ss)
824 {
825 	/* NB: don't try to abort scan; wait for firmware to finish */
826 }
827 
828 static void
829 rsu_update_promisc(struct ieee80211com *ic)
830 {
831 	struct rsu_softc *sc = ic->ic_softc;
832 
833 	RSU_LOCK(sc);
834 	if (sc->sc_running)
835 		rsu_rxfilter_refresh(sc);
836 	RSU_UNLOCK(sc);
837 }
838 
839 /*
840  * The same as rtwn_get_multi_pos() / rtwn_set_multi().
841  */
842 static uint8_t
843 rsu_get_multi_pos(const uint8_t maddr[])
844 {
845 	uint64_t mask = 0x00004d101df481b4;
846 	uint8_t pos = 0x27;	/* initial value */
847 	int i, j;
848 
849 	for (i = 0; i < IEEE80211_ADDR_LEN; i++)
850 		for (j = (i == 0) ? 1 : 0; j < 8; j++)
851 			if ((maddr[i] >> j) & 1)
852 				pos ^= (mask >> (i * 8 + j - 1));
853 
854 	pos &= 0x3f;
855 
856 	return (pos);
857 }
858 
859 static u_int
860 rsu_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
861 {
862 	uint32_t *mfilt = arg;
863 	uint8_t pos;
864 
865 	pos = rsu_get_multi_pos(LLADDR(sdl));
866 	mfilt[pos / 32] |= (1 << (pos % 32));
867 
868 	return (1);
869 }
870 
871 static void
872 rsu_set_multi(struct rsu_softc *sc)
873 {
874 	struct ieee80211com *ic = &sc->sc_ic;
875 	uint32_t mfilt[2];
876 
877 	RSU_ASSERT_LOCKED(sc);
878 
879 	/* general structure was copied from ath(4). */
880 	if (ic->ic_allmulti == 0) {
881 		struct ieee80211vap *vap;
882 
883 		/*
884 		 * Merge multicast addresses to form the hardware filter.
885 		 */
886 		mfilt[0] = mfilt[1] = 0;
887 		TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
888 			if_foreach_llmaddr(vap->iv_ifp, rsu_hash_maddr, &mfilt);
889 	} else
890 		mfilt[0] = mfilt[1] = ~0;
891 
892 	rsu_write_4(sc, R92S_MAR + 0, mfilt[0]);
893 	rsu_write_4(sc, R92S_MAR + 4, mfilt[1]);
894 
895 	RSU_DPRINTF(sc, RSU_DEBUG_STATE, "%s: MC filter %08x:%08x\n",
896 	    __func__, mfilt[0], mfilt[1]);
897 }
898 
899 static void
900 rsu_update_mcast(struct ieee80211com *ic)
901 {
902 	struct rsu_softc *sc = ic->ic_softc;
903 
904 	RSU_LOCK(sc);
905 	if (sc->sc_running)
906 		rsu_set_multi(sc);
907 	RSU_UNLOCK(sc);
908 }
909 
910 static int
911 rsu_alloc_list(struct rsu_softc *sc, struct rsu_data data[],
912     int ndata, int maxsz)
913 {
914 	int i, error;
915 
916 	for (i = 0; i < ndata; i++) {
917 		struct rsu_data *dp = &data[i];
918 		dp->sc = sc;
919 		dp->m = NULL;
920 		dp->buf = malloc(maxsz, M_USBDEV, M_NOWAIT);
921 		if (dp->buf == NULL) {
922 			device_printf(sc->sc_dev,
923 			    "could not allocate buffer\n");
924 			error = ENOMEM;
925 			goto fail;
926 		}
927 		dp->ni = NULL;
928 	}
929 
930 	return (0);
931 fail:
932 	rsu_free_list(sc, data, ndata);
933 	return (error);
934 }
935 
936 static int
937 rsu_alloc_rx_list(struct rsu_softc *sc)
938 {
939         int error, i;
940 
941 	error = rsu_alloc_list(sc, sc->sc_rx, RSU_RX_LIST_COUNT,
942 	    RSU_RXBUFSZ);
943 	if (error != 0)
944 		return (error);
945 
946 	STAILQ_INIT(&sc->sc_rx_active);
947 	STAILQ_INIT(&sc->sc_rx_inactive);
948 
949 	for (i = 0; i < RSU_RX_LIST_COUNT; i++)
950 		STAILQ_INSERT_HEAD(&sc->sc_rx_inactive, &sc->sc_rx[i], next);
951 
952 	return (0);
953 }
954 
955 static int
956 rsu_alloc_tx_list(struct rsu_softc *sc)
957 {
958 	int error, i;
959 
960 	error = rsu_alloc_list(sc, sc->sc_tx, RSU_TX_LIST_COUNT,
961 	    RSU_TXBUFSZ);
962 	if (error != 0)
963 		return (error);
964 
965 	STAILQ_INIT(&sc->sc_tx_inactive);
966 
967 	for (i = 0; i != RSU_N_TRANSFER; i++) {
968 		STAILQ_INIT(&sc->sc_tx_active[i]);
969 		STAILQ_INIT(&sc->sc_tx_pending[i]);
970 	}
971 
972 	for (i = 0; i < RSU_TX_LIST_COUNT; i++) {
973 		STAILQ_INSERT_HEAD(&sc->sc_tx_inactive, &sc->sc_tx[i], next);
974 	}
975 
976 	return (0);
977 }
978 
979 static void
980 rsu_free_tx_list(struct rsu_softc *sc)
981 {
982 	int i;
983 
984 	/* prevent further allocations from TX list(s) */
985 	STAILQ_INIT(&sc->sc_tx_inactive);
986 
987 	for (i = 0; i != RSU_N_TRANSFER; i++) {
988 		STAILQ_INIT(&sc->sc_tx_active[i]);
989 		STAILQ_INIT(&sc->sc_tx_pending[i]);
990 	}
991 
992 	rsu_free_list(sc, sc->sc_tx, RSU_TX_LIST_COUNT);
993 }
994 
995 static void
996 rsu_free_rx_list(struct rsu_softc *sc)
997 {
998 	/* prevent further allocations from RX list(s) */
999 	STAILQ_INIT(&sc->sc_rx_inactive);
1000 	STAILQ_INIT(&sc->sc_rx_active);
1001 
1002 	rsu_free_list(sc, sc->sc_rx, RSU_RX_LIST_COUNT);
1003 }
1004 
1005 static void
1006 rsu_free_list(struct rsu_softc *sc, struct rsu_data data[], int ndata)
1007 {
1008 	int i;
1009 
1010 	for (i = 0; i < ndata; i++) {
1011 		struct rsu_data *dp = &data[i];
1012 
1013 		if (dp->buf != NULL) {
1014 			free(dp->buf, M_USBDEV);
1015 			dp->buf = NULL;
1016 		}
1017 		if (dp->ni != NULL) {
1018 			ieee80211_free_node(dp->ni);
1019 			dp->ni = NULL;
1020 		}
1021 	}
1022 }
1023 
1024 static struct rsu_data *
1025 _rsu_getbuf(struct rsu_softc *sc)
1026 {
1027 	struct rsu_data *bf;
1028 
1029 	bf = STAILQ_FIRST(&sc->sc_tx_inactive);
1030 	if (bf != NULL)
1031 		STAILQ_REMOVE_HEAD(&sc->sc_tx_inactive, next);
1032 	else
1033 		bf = NULL;
1034 	return (bf);
1035 }
1036 
1037 static struct rsu_data *
1038 rsu_getbuf(struct rsu_softc *sc)
1039 {
1040 	struct rsu_data *bf;
1041 
1042 	RSU_ASSERT_LOCKED(sc);
1043 
1044 	bf = _rsu_getbuf(sc);
1045 	if (bf == NULL) {
1046 		RSU_DPRINTF(sc, RSU_DEBUG_TX, "%s: no buffers\n", __func__);
1047 	}
1048 	return (bf);
1049 }
1050 
1051 static void
1052 rsu_freebuf(struct rsu_softc *sc, struct rsu_data *bf)
1053 {
1054 
1055 	RSU_ASSERT_LOCKED(sc);
1056 	STAILQ_INSERT_TAIL(&sc->sc_tx_inactive, bf, next);
1057 }
1058 
1059 static int
1060 rsu_write_region_1(struct rsu_softc *sc, uint16_t addr, uint8_t *buf,
1061     int len)
1062 {
1063 	usb_device_request_t req;
1064 
1065 	req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
1066 	req.bRequest = R92S_REQ_REGS;
1067 	USETW(req.wValue, addr);
1068 	USETW(req.wIndex, 0);
1069 	USETW(req.wLength, len);
1070 
1071 	return (rsu_do_request(sc, &req, buf));
1072 }
1073 
1074 static void
1075 rsu_write_1(struct rsu_softc *sc, uint16_t addr, uint8_t val)
1076 {
1077 	rsu_write_region_1(sc, addr, &val, 1);
1078 }
1079 
1080 static void
1081 rsu_write_2(struct rsu_softc *sc, uint16_t addr, uint16_t val)
1082 {
1083 	val = htole16(val);
1084 	rsu_write_region_1(sc, addr, (uint8_t *)&val, 2);
1085 }
1086 
1087 static void
1088 rsu_write_4(struct rsu_softc *sc, uint16_t addr, uint32_t val)
1089 {
1090 	val = htole32(val);
1091 	rsu_write_region_1(sc, addr, (uint8_t *)&val, 4);
1092 }
1093 
1094 static int
1095 rsu_read_region_1(struct rsu_softc *sc, uint16_t addr, uint8_t *buf,
1096     int len)
1097 {
1098 	usb_device_request_t req;
1099 
1100 	req.bmRequestType = UT_READ_VENDOR_DEVICE;
1101 	req.bRequest = R92S_REQ_REGS;
1102 	USETW(req.wValue, addr);
1103 	USETW(req.wIndex, 0);
1104 	USETW(req.wLength, len);
1105 
1106 	return (rsu_do_request(sc, &req, buf));
1107 }
1108 
1109 static uint8_t
1110 rsu_read_1(struct rsu_softc *sc, uint16_t addr)
1111 {
1112 	uint8_t val;
1113 
1114 	if (rsu_read_region_1(sc, addr, &val, 1) != 0)
1115 		return (0xff);
1116 	return (val);
1117 }
1118 
1119 static uint16_t
1120 rsu_read_2(struct rsu_softc *sc, uint16_t addr)
1121 {
1122 	uint16_t val;
1123 
1124 	if (rsu_read_region_1(sc, addr, (uint8_t *)&val, 2) != 0)
1125 		return (0xffff);
1126 	return (le16toh(val));
1127 }
1128 
1129 static uint32_t
1130 rsu_read_4(struct rsu_softc *sc, uint16_t addr)
1131 {
1132 	uint32_t val;
1133 
1134 	if (rsu_read_region_1(sc, addr, (uint8_t *)&val, 4) != 0)
1135 		return (0xffffffff);
1136 	return (le32toh(val));
1137 }
1138 
1139 static int
1140 rsu_fw_iocmd(struct rsu_softc *sc, uint32_t iocmd)
1141 {
1142 	int ntries;
1143 
1144 	rsu_write_4(sc, R92S_IOCMD_CTRL, iocmd);
1145 	rsu_ms_delay(sc, 1);
1146 	for (ntries = 0; ntries < 50; ntries++) {
1147 		if (rsu_read_4(sc, R92S_IOCMD_CTRL) == 0)
1148 			return (0);
1149 		rsu_ms_delay(sc, 1);
1150 	}
1151 	return (ETIMEDOUT);
1152 }
1153 
1154 static uint8_t
1155 rsu_efuse_read_1(struct rsu_softc *sc, uint16_t addr)
1156 {
1157 	uint32_t reg;
1158 	int ntries;
1159 
1160 	reg = rsu_read_4(sc, R92S_EFUSE_CTRL);
1161 	reg = RW(reg, R92S_EFUSE_CTRL_ADDR, addr);
1162 	reg &= ~R92S_EFUSE_CTRL_VALID;
1163 	rsu_write_4(sc, R92S_EFUSE_CTRL, reg);
1164 	/* Wait for read operation to complete. */
1165 	for (ntries = 0; ntries < 100; ntries++) {
1166 		reg = rsu_read_4(sc, R92S_EFUSE_CTRL);
1167 		if (reg & R92S_EFUSE_CTRL_VALID)
1168 			return (MS(reg, R92S_EFUSE_CTRL_DATA));
1169 		rsu_ms_delay(sc, 1);
1170 	}
1171 	device_printf(sc->sc_dev,
1172 	    "could not read efuse byte at address 0x%x\n", addr);
1173 	return (0xff);
1174 }
1175 
1176 static int
1177 rsu_read_rom(struct rsu_softc *sc)
1178 {
1179 	uint8_t *rom = sc->rom;
1180 	uint16_t addr = 0;
1181 	uint32_t reg;
1182 	uint8_t off, msk;
1183 	int i;
1184 
1185 	/* Make sure that ROM type is eFuse and that autoload succeeded. */
1186 	reg = rsu_read_1(sc, R92S_EE_9346CR);
1187 	if ((reg & (R92S_9356SEL | R92S_EEPROM_EN)) != R92S_EEPROM_EN)
1188 		return (EIO);
1189 
1190 	/* Turn on 2.5V to prevent eFuse leakage. */
1191 	reg = rsu_read_1(sc, R92S_EFUSE_TEST + 3);
1192 	rsu_write_1(sc, R92S_EFUSE_TEST + 3, reg | 0x80);
1193 	rsu_ms_delay(sc, 1);
1194 	rsu_write_1(sc, R92S_EFUSE_TEST + 3, reg & ~0x80);
1195 
1196 	/* Read full ROM image. */
1197 	memset(&sc->rom, 0xff, sizeof(sc->rom));
1198 	while (addr < 512) {
1199 		reg = rsu_efuse_read_1(sc, addr);
1200 		if (reg == 0xff)
1201 			break;
1202 		addr++;
1203 		off = reg >> 4;
1204 		msk = reg & 0xf;
1205 		for (i = 0; i < 4; i++) {
1206 			if (msk & (1 << i))
1207 				continue;
1208 			rom[off * 8 + i * 2 + 0] =
1209 			    rsu_efuse_read_1(sc, addr);
1210 			addr++;
1211 			rom[off * 8 + i * 2 + 1] =
1212 			    rsu_efuse_read_1(sc, addr);
1213 			addr++;
1214 		}
1215 	}
1216 #ifdef USB_DEBUG
1217 	if (rsu_debug & RSU_DEBUG_RESET) {
1218 		/* Dump ROM content. */
1219 		printf("\n");
1220 		for (i = 0; i < sizeof(sc->rom); i++)
1221 			printf("%02x:", rom[i]);
1222 		printf("\n");
1223 	}
1224 #endif
1225 	return (0);
1226 }
1227 
1228 static int
1229 rsu_fw_cmd(struct rsu_softc *sc, uint8_t code, void *buf, int len)
1230 {
1231 	const uint8_t which = RSU_H2C_ENDPOINT;
1232 	struct rsu_data *data;
1233 	struct r92s_tx_desc *txd;
1234 	struct r92s_fw_cmd_hdr *cmd;
1235 	int cmdsz;
1236 	int xferlen;
1237 
1238 	RSU_ASSERT_LOCKED(sc);
1239 
1240 	data = rsu_getbuf(sc);
1241 	if (data == NULL)
1242 		return (ENOMEM);
1243 
1244 	/* Blank the entire payload, just to be safe */
1245 	memset(data->buf, '\0', RSU_TXBUFSZ);
1246 
1247 	/* Round-up command length to a multiple of 8 bytes. */
1248 	/* XXX TODO: is this required? */
1249 	cmdsz = (len + 7) & ~7;
1250 
1251 	xferlen = sizeof(*txd) + sizeof(*cmd) + cmdsz;
1252 	KASSERT(xferlen <= RSU_TXBUFSZ, ("%s: invalid length", __func__));
1253 	memset(data->buf, 0, xferlen);
1254 
1255 	/* Setup Tx descriptor. */
1256 	txd = (struct r92s_tx_desc *)data->buf;
1257 	txd->txdw0 = htole32(
1258 	    SM(R92S_TXDW0_OFFSET, sizeof(*txd)) |
1259 	    SM(R92S_TXDW0_PKTLEN, sizeof(*cmd) + cmdsz) |
1260 	    R92S_TXDW0_OWN | R92S_TXDW0_FSG | R92S_TXDW0_LSG);
1261 	txd->txdw1 = htole32(SM(R92S_TXDW1_QSEL, R92S_TXDW1_QSEL_H2C));
1262 
1263 	/* Setup command header. */
1264 	cmd = (struct r92s_fw_cmd_hdr *)&txd[1];
1265 	cmd->len = htole16(cmdsz);
1266 	cmd->code = code;
1267 	cmd->seq = sc->cmd_seq;
1268 	sc->cmd_seq = (sc->cmd_seq + 1) & 0x7f;
1269 
1270 	/* Copy command payload. */
1271 	memcpy(&cmd[1], buf, len);
1272 
1273 	RSU_DPRINTF(sc, RSU_DEBUG_TX | RSU_DEBUG_FWCMD,
1274 	    "%s: Tx cmd code=0x%x len=0x%x\n",
1275 	    __func__, code, cmdsz);
1276 	data->buflen = xferlen;
1277 	STAILQ_INSERT_TAIL(&sc->sc_tx_pending[which], data, next);
1278 	usbd_transfer_start(sc->sc_xfer[which]);
1279 
1280 	return (0);
1281 }
1282 
1283 /* ARGSUSED */
1284 static void
1285 rsu_calib_task(void *arg, int pending __unused)
1286 {
1287 	struct rsu_softc *sc = arg;
1288 #ifdef notyet
1289 	uint32_t reg;
1290 #endif
1291 
1292 	RSU_DPRINTF(sc, RSU_DEBUG_CALIB, "%s: running calibration task\n",
1293 	    __func__);
1294 
1295 	RSU_LOCK(sc);
1296 #ifdef notyet
1297 	/* Read WPS PBC status. */
1298 	rsu_write_1(sc, R92S_MAC_PINMUX_CTRL,
1299 	    R92S_GPIOMUX_EN | SM(R92S_GPIOSEL_GPIO, R92S_GPIOSEL_GPIO_JTAG));
1300 	rsu_write_1(sc, R92S_GPIO_IO_SEL,
1301 	    rsu_read_1(sc, R92S_GPIO_IO_SEL) & ~R92S_GPIO_WPS);
1302 	reg = rsu_read_1(sc, R92S_GPIO_CTRL);
1303 	if (reg != 0xff && (reg & R92S_GPIO_WPS))
1304 		RSU_DPRINTF(sc, RSU_DEBUG_CALIB, "WPS PBC is pushed\n");
1305 #endif
1306 	/* Read current signal level. */
1307 	if (rsu_fw_iocmd(sc, 0xf4000001) == 0) {
1308 		sc->sc_currssi = rsu_read_4(sc, R92S_IOCMD_DATA);
1309 		RSU_DPRINTF(sc, RSU_DEBUG_CALIB, "%s: RSSI=%d (%d)\n",
1310 		    __func__, sc->sc_currssi,
1311 		    rsu_hwrssi_to_rssi(sc, sc->sc_currssi));
1312 	}
1313 	if (sc->sc_calibrating)
1314 		taskqueue_enqueue_timeout(taskqueue_thread, &sc->calib_task, hz);
1315 	RSU_UNLOCK(sc);
1316 }
1317 
1318 static void
1319 rsu_tx_task(void *arg, int pending __unused)
1320 {
1321 	struct rsu_softc *sc = arg;
1322 
1323 	RSU_LOCK(sc);
1324 	_rsu_start(sc);
1325 	RSU_UNLOCK(sc);
1326 }
1327 
1328 #define	RSU_PWR_UNKNOWN		0x0
1329 #define	RSU_PWR_ACTIVE		0x1
1330 #define	RSU_PWR_OFF		0x2
1331 #define	RSU_PWR_SLEEP		0x3
1332 
1333 /*
1334  * Set the current power state.
1335  *
1336  * The rtlwifi code doesn't do this so aggressively; it
1337  * waits for an idle period after association with
1338  * no traffic before doing this.
1339  *
1340  * For now - it's on in all states except RUN, and
1341  * in RUN it'll transition to allow sleep.
1342  */
1343 
1344 struct r92s_pwr_cmd {
1345 	uint8_t mode;
1346 	uint8_t smart_ps;
1347 	uint8_t bcn_pass_time;
1348 };
1349 
1350 static int
1351 rsu_set_fw_power_state(struct rsu_softc *sc, int state)
1352 {
1353 	struct r92s_set_pwr_mode cmd;
1354 	//struct r92s_pwr_cmd cmd;
1355 	int error;
1356 
1357 	RSU_ASSERT_LOCKED(sc);
1358 
1359 	/* only change state if required */
1360 	if (sc->sc_curpwrstate == state)
1361 		return (0);
1362 
1363 	memset(&cmd, 0, sizeof(cmd));
1364 
1365 	switch (state) {
1366 	case RSU_PWR_ACTIVE:
1367 		/* Force the hardware awake */
1368 		rsu_write_1(sc, R92S_USB_HRPWM,
1369 		    R92S_USB_HRPWM_PS_ST_ACTIVE | R92S_USB_HRPWM_PS_ALL_ON);
1370 		cmd.mode = R92S_PS_MODE_ACTIVE;
1371 		break;
1372 	case RSU_PWR_SLEEP:
1373 		cmd.mode = R92S_PS_MODE_DTIM;	/* XXX configurable? */
1374 		cmd.smart_ps = 1; /* XXX 2 if doing p2p */
1375 		cmd.bcn_pass_time = 5; /* in 100mS usb.c, linux/rtlwifi */
1376 		break;
1377 	case RSU_PWR_OFF:
1378 		cmd.mode = R92S_PS_MODE_RADIOOFF;
1379 		break;
1380 	default:
1381 		device_printf(sc->sc_dev, "%s: unknown ps mode (%d)\n",
1382 		    __func__,
1383 		    state);
1384 		return (ENXIO);
1385 	}
1386 
1387 	RSU_DPRINTF(sc, RSU_DEBUG_RESET,
1388 	    "%s: setting ps mode to %d (mode %d)\n",
1389 	    __func__, state, cmd.mode);
1390 	error = rsu_fw_cmd(sc, R92S_CMD_SET_PWR_MODE, &cmd, sizeof(cmd));
1391 	if (error == 0)
1392 		sc->sc_curpwrstate = state;
1393 
1394 	return (error);
1395 }
1396 
1397 static void
1398 rsu_set_led(struct rsu_softc *sc, int on)
1399 {
1400 	rsu_write_1(sc, R92S_LEDCFG,
1401 	    (rsu_read_1(sc, R92S_LEDCFG) & 0xf0) | (!on << 3));
1402 }
1403 
1404 static int
1405 rsu_monitor_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate,
1406     int arg)
1407 {
1408 	struct ieee80211com *ic = vap->iv_ic;
1409 	struct rsu_softc *sc = ic->ic_softc;
1410 	struct rsu_vap *uvp = RSU_VAP(vap);
1411 
1412 	if (vap->iv_state != nstate) {
1413 		IEEE80211_UNLOCK(ic);
1414 		RSU_LOCK(sc);
1415 
1416 		switch (nstate) {
1417 		case IEEE80211_S_INIT:
1418 			sc->sc_vap_is_running = 0;
1419 			rsu_set_led(sc, 0);
1420 			break;
1421 		case IEEE80211_S_RUN:
1422 			sc->sc_vap_is_running = 1;
1423 			rsu_set_led(sc, 1);
1424 			break;
1425 		default:
1426 			/* NOTREACHED */
1427 			break;
1428 		}
1429 		rsu_rxfilter_refresh(sc);
1430 
1431 		RSU_UNLOCK(sc);
1432 		IEEE80211_LOCK(ic);
1433 	}
1434 
1435 	return (uvp->newstate(vap, nstate, arg));
1436 }
1437 
1438 static int
1439 rsu_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
1440 {
1441 	struct rsu_vap *uvp = RSU_VAP(vap);
1442 	struct ieee80211com *ic = vap->iv_ic;
1443 	struct rsu_softc *sc = ic->ic_softc;
1444 	struct ieee80211_node *ni;
1445 	struct ieee80211_rateset *rs;
1446 	enum ieee80211_state ostate;
1447 	int error, startcal = 0;
1448 
1449 	ostate = vap->iv_state;
1450 	RSU_DPRINTF(sc, RSU_DEBUG_STATE, "%s: %s -> %s\n",
1451 	    __func__,
1452 	    ieee80211_state_name[ostate],
1453 	    ieee80211_state_name[nstate]);
1454 
1455 	IEEE80211_UNLOCK(ic);
1456 	if (ostate == IEEE80211_S_RUN) {
1457 		RSU_LOCK(sc);
1458 		/* Stop calibration. */
1459 		sc->sc_calibrating = 0;
1460 
1461 		/* Pause Tx for AC queues. */
1462 		rsu_write_1(sc, R92S_TXPAUSE, R92S_TXPAUSE_AC);
1463 		usb_pause_mtx(&sc->sc_mtx, USB_MS_TO_TICKS(10));
1464 
1465 		RSU_UNLOCK(sc);
1466 		taskqueue_drain_timeout(taskqueue_thread, &sc->calib_task);
1467 		taskqueue_drain(taskqueue_thread, &sc->tx_task);
1468 		RSU_LOCK(sc);
1469 		/* Disassociate from our current BSS. */
1470 		rsu_disconnect(sc);
1471 		usb_pause_mtx(&sc->sc_mtx, USB_MS_TO_TICKS(10));
1472 
1473 		/* Refresh Rx filter (may be modified by firmware). */
1474 		sc->sc_vap_is_running = 0;
1475 		rsu_rxfilter_refresh(sc);
1476 
1477 		/* Reinstall static keys. */
1478 		if (sc->sc_running)
1479 			rsu_reinit_static_keys(sc);
1480 	} else
1481 		RSU_LOCK(sc);
1482 	switch (nstate) {
1483 	case IEEE80211_S_INIT:
1484 		(void) rsu_set_fw_power_state(sc, RSU_PWR_ACTIVE);
1485 		break;
1486 	case IEEE80211_S_AUTH:
1487 		ni = ieee80211_ref_node(vap->iv_bss);
1488 		(void) rsu_set_fw_power_state(sc, RSU_PWR_ACTIVE);
1489 		error = rsu_join_bss(sc, ni);
1490 		ieee80211_free_node(ni);
1491 		if (error != 0) {
1492 			device_printf(sc->sc_dev,
1493 			    "could not send join command\n");
1494 		}
1495 		break;
1496 	case IEEE80211_S_RUN:
1497 		/* Flush all AC queues. */
1498 		rsu_write_1(sc, R92S_TXPAUSE, 0);
1499 
1500 		ni = ieee80211_ref_node(vap->iv_bss);
1501 		rs = &ni->ni_rates;
1502 		/* Indicate highest supported rate. */
1503 		ni->ni_txrate = rs->rs_rates[rs->rs_nrates - 1];
1504 		(void) rsu_set_fw_power_state(sc, RSU_PWR_SLEEP);
1505 		ieee80211_free_node(ni);
1506 		startcal = 1;
1507 		break;
1508 	default:
1509 		break;
1510 	}
1511 	if (startcal != 0) {
1512 		sc->sc_calibrating = 1;
1513 		/* Start periodic calibration. */
1514 		taskqueue_enqueue_timeout(taskqueue_thread, &sc->calib_task,
1515 		    hz);
1516 	}
1517 	RSU_UNLOCK(sc);
1518 	IEEE80211_LOCK(ic);
1519 	return (uvp->newstate(vap, nstate, arg));
1520 }
1521 
1522 static int
1523 rsu_key_alloc(struct ieee80211vap *vap, struct ieee80211_key *k,
1524     ieee80211_keyix *keyix, ieee80211_keyix *rxkeyix)
1525 {
1526 	struct rsu_softc *sc = vap->iv_ic->ic_softc;
1527 	int is_checked = 0;
1528 
1529 	if (&vap->iv_nw_keys[0] <= k &&
1530 	    k < &vap->iv_nw_keys[IEEE80211_WEP_NKID]) {
1531 		*keyix = ieee80211_crypto_get_key_wepidx(vap, k);
1532 	} else {
1533 		if (vap->iv_opmode != IEEE80211_M_STA) {
1534 			*keyix = 0;
1535 			/* TODO: obtain keyix from node id */
1536 			is_checked = 1;
1537 			k->wk_flags |= IEEE80211_KEY_SWCRYPT;
1538 		} else
1539 			*keyix = R92S_MACID_BSS;
1540 	}
1541 
1542 	if (!is_checked) {
1543 		RSU_LOCK(sc);
1544 		if (isset(sc->keys_bmap, *keyix)) {
1545 			device_printf(sc->sc_dev,
1546 			    "%s: key slot %d is already used!\n",
1547 			    __func__, *keyix);
1548 			RSU_UNLOCK(sc);
1549 			return (0);
1550 		}
1551 		setbit(sc->keys_bmap, *keyix);
1552 		RSU_UNLOCK(sc);
1553 	}
1554 
1555 	*rxkeyix = *keyix;
1556 
1557 	return (1);
1558 }
1559 
1560 static int
1561 rsu_process_key(struct ieee80211vap *vap, const struct ieee80211_key *k,
1562     int set)
1563 {
1564 	struct rsu_softc *sc = vap->iv_ic->ic_softc;
1565 	int ret;
1566 
1567 	if (k->wk_flags & IEEE80211_KEY_SWCRYPT) {
1568 		/* Not for us. */
1569 		return (1);
1570 	}
1571 
1572 	/* Handle group keys. */
1573 	if (&vap->iv_nw_keys[0] <= k &&
1574 	    k < &vap->iv_nw_keys[IEEE80211_WEP_NKID]) {
1575 		KASSERT(k->wk_keyix < nitems(sc->group_keys),
1576 		    ("keyix %u > %zu\n", k->wk_keyix, nitems(sc->group_keys)));
1577 
1578 		RSU_LOCK(sc);
1579 		sc->group_keys[k->wk_keyix] = (set ? k : NULL);
1580 		if (!sc->sc_running) {
1581 			/* Static keys will be set during device startup. */
1582 			RSU_UNLOCK(sc);
1583 			return (1);
1584 		}
1585 
1586 		if (set)
1587 			ret = rsu_set_key_group(sc, k);
1588 		else
1589 			ret = rsu_delete_key(sc, k->wk_keyix);
1590 		RSU_UNLOCK(sc);
1591 
1592 		return (!ret);
1593 	}
1594 
1595 	if (set) {
1596 		/* wait for pending key removal */
1597 		taskqueue_drain(taskqueue_thread, &sc->del_key_task);
1598 
1599 		RSU_LOCK(sc);
1600 		ret = rsu_set_key_pair(sc, k);
1601 		RSU_UNLOCK(sc);
1602 	} else {
1603 		RSU_DELKEY_BMAP_LOCK(sc);
1604 		setbit(sc->free_keys_bmap, k->wk_keyix);
1605 		RSU_DELKEY_BMAP_UNLOCK(sc);
1606 
1607 		/* workaround ieee80211_node_delucastkey() locking */
1608 		taskqueue_enqueue(taskqueue_thread, &sc->del_key_task);
1609 		ret = 0;	/* fake success */
1610 	}
1611 
1612 	return (!ret);
1613 }
1614 
1615 static int
1616 rsu_key_set(struct ieee80211vap *vap, const struct ieee80211_key *k)
1617 {
1618 	return (rsu_process_key(vap, k, 1));
1619 }
1620 
1621 static int
1622 rsu_key_delete(struct ieee80211vap *vap, const struct ieee80211_key *k)
1623 {
1624 	return (rsu_process_key(vap, k, 0));
1625 }
1626 
1627 static int
1628 rsu_cam_read(struct rsu_softc *sc, uint8_t addr, uint32_t *val)
1629 {
1630 	int ntries;
1631 
1632 	rsu_write_4(sc, R92S_CAMCMD,
1633 	    R92S_CAMCMD_POLLING | SM(R92S_CAMCMD_ADDR, addr));
1634 	for (ntries = 0; ntries < 10; ntries++) {
1635 		if (!(rsu_read_4(sc, R92S_CAMCMD) & R92S_CAMCMD_POLLING))
1636 			break;
1637 
1638 		usb_pause_mtx(&sc->sc_mtx, USB_MS_TO_TICKS(1));
1639 	}
1640 	if (ntries == 10) {
1641 		device_printf(sc->sc_dev,
1642 		    "%s: cannot read CAM entry at address %02X\n",
1643 		    __func__, addr);
1644 		return (ETIMEDOUT);
1645 	}
1646 
1647 	*val = rsu_read_4(sc, R92S_CAMREAD);
1648 
1649 	return (0);
1650 }
1651 
1652 static void
1653 rsu_cam_write(struct rsu_softc *sc, uint8_t addr, uint32_t data)
1654 {
1655 
1656 	rsu_write_4(sc, R92S_CAMWRITE, data);
1657 	rsu_write_4(sc, R92S_CAMCMD,
1658 	    R92S_CAMCMD_POLLING | R92S_CAMCMD_WRITE |
1659 	    SM(R92S_CAMCMD_ADDR, addr));
1660 }
1661 
1662 static int
1663 rsu_key_check(struct rsu_softc *sc, ieee80211_keyix keyix, int is_valid)
1664 {
1665 	uint32_t val;
1666 	int error, ntries;
1667 
1668 	for (ntries = 0; ntries < 20; ntries++) {
1669 		usb_pause_mtx(&sc->sc_mtx, USB_MS_TO_TICKS(1));
1670 
1671 		error = rsu_cam_read(sc, R92S_CAM_CTL0(keyix), &val);
1672 		if (error != 0) {
1673 			device_printf(sc->sc_dev,
1674 			    "%s: cannot check key status!\n", __func__);
1675 			return (error);
1676 		}
1677 		if (((val & R92S_CAM_VALID) == 0) ^ is_valid)
1678 			break;
1679 	}
1680 	if (ntries == 20) {
1681 		device_printf(sc->sc_dev,
1682 		    "%s: key %d is %s marked as valid, rejecting request\n",
1683 		    __func__, keyix, is_valid ? "not" : "still");
1684 		return (EIO);
1685 	}
1686 
1687 	return (0);
1688 }
1689 
1690 /*
1691  * Map net80211 cipher to RTL8712 security mode.
1692  */
1693 static uint8_t
1694 rsu_crypto_mode(struct rsu_softc *sc, u_int cipher, int keylen)
1695 {
1696 	switch (cipher) {
1697 	case IEEE80211_CIPHER_WEP:
1698 		return keylen < 8 ? R92S_KEY_ALGO_WEP40 : R92S_KEY_ALGO_WEP104;
1699 	case IEEE80211_CIPHER_TKIP:
1700 		return R92S_KEY_ALGO_TKIP;
1701 	case IEEE80211_CIPHER_AES_CCM:
1702 		return R92S_KEY_ALGO_AES;
1703 	default:
1704 		device_printf(sc->sc_dev, "unknown cipher %d\n", cipher);
1705 		return R92S_KEY_ALGO_INVALID;
1706 	}
1707 }
1708 
1709 static int
1710 rsu_set_key_group(struct rsu_softc *sc, const struct ieee80211_key *k)
1711 {
1712 	struct r92s_fw_cmd_set_key key;
1713 	uint8_t algo;
1714 	int error;
1715 
1716 	RSU_ASSERT_LOCKED(sc);
1717 
1718 	/* Map net80211 cipher to HW crypto algorithm. */
1719 	algo = rsu_crypto_mode(sc, k->wk_cipher->ic_cipher, k->wk_keylen);
1720 	if (algo == R92S_KEY_ALGO_INVALID)
1721 		return (EINVAL);
1722 
1723 	memset(&key, 0, sizeof(key));
1724 	key.algo = algo;
1725 	key.cam_id = k->wk_keyix;
1726 	key.grpkey = (k->wk_flags & IEEE80211_KEY_GROUP) != 0;
1727 	memcpy(key.key, k->wk_key, MIN(k->wk_keylen, sizeof(key.key)));
1728 
1729 	RSU_DPRINTF(sc, RSU_DEBUG_KEY | RSU_DEBUG_FWCMD,
1730 	    "%s: keyix %u, group %u, algo %u/%u, flags %04X, len %u, "
1731 	    "macaddr %s\n", __func__, key.cam_id, key.grpkey,
1732 	    k->wk_cipher->ic_cipher, key.algo, k->wk_flags, k->wk_keylen,
1733 	    ether_sprintf(k->wk_macaddr));
1734 
1735 	error = rsu_fw_cmd(sc, R92S_CMD_SET_KEY, &key, sizeof(key));
1736 	if (error != 0) {
1737 		device_printf(sc->sc_dev,
1738 		    "%s: cannot send firmware command, error %d\n",
1739 		    __func__, error);
1740 		return (error);
1741 	}
1742 
1743 	return (rsu_key_check(sc, k->wk_keyix, 1));
1744 }
1745 
1746 static int
1747 rsu_set_key_pair(struct rsu_softc *sc, const struct ieee80211_key *k)
1748 {
1749 	struct r92s_fw_cmd_set_key_mac key;
1750 	uint8_t algo;
1751 	int error;
1752 
1753 	RSU_ASSERT_LOCKED(sc);
1754 
1755 	if (!sc->sc_running)
1756 		return (ESHUTDOWN);
1757 
1758 	/* Map net80211 cipher to HW crypto algorithm. */
1759 	algo = rsu_crypto_mode(sc, k->wk_cipher->ic_cipher, k->wk_keylen);
1760 	if (algo == R92S_KEY_ALGO_INVALID)
1761 		return (EINVAL);
1762 
1763 	memset(&key, 0, sizeof(key));
1764 	key.algo = algo;
1765 	memcpy(key.macaddr, k->wk_macaddr, sizeof(key.macaddr));
1766 	memcpy(key.key, k->wk_key, MIN(k->wk_keylen, sizeof(key.key)));
1767 
1768 	RSU_DPRINTF(sc, RSU_DEBUG_KEY | RSU_DEBUG_FWCMD,
1769 	    "%s: keyix %u, algo %u/%u, flags %04X, len %u, macaddr %s\n",
1770 	    __func__, k->wk_keyix, k->wk_cipher->ic_cipher, key.algo,
1771 	    k->wk_flags, k->wk_keylen, ether_sprintf(key.macaddr));
1772 
1773 	error = rsu_fw_cmd(sc, R92S_CMD_SET_STA_KEY, &key, sizeof(key));
1774 	if (error != 0) {
1775 		device_printf(sc->sc_dev,
1776 		    "%s: cannot send firmware command, error %d\n",
1777 		    __func__, error);
1778 		return (error);
1779 	}
1780 
1781 	return (rsu_key_check(sc, k->wk_keyix, 1));
1782 }
1783 
1784 static int
1785 rsu_reinit_static_keys(struct rsu_softc *sc)
1786 {
1787 	int i, error;
1788 
1789 	for (i = 0; i < nitems(sc->group_keys); i++) {
1790 		if (sc->group_keys[i] != NULL) {
1791 			error = rsu_set_key_group(sc, sc->group_keys[i]);
1792 			if (error != 0) {
1793 				device_printf(sc->sc_dev,
1794 				    "%s: failed to set static key %d, "
1795 				    "error %d\n", __func__, i, error);
1796 				return (error);
1797 			}
1798 		}
1799 	}
1800 
1801 	return (0);
1802 }
1803 
1804 static int
1805 rsu_delete_key(struct rsu_softc *sc, ieee80211_keyix keyix)
1806 {
1807 	struct r92s_fw_cmd_set_key key;
1808 	uint32_t val;
1809 	int error;
1810 
1811 	RSU_ASSERT_LOCKED(sc);
1812 
1813 	if (!sc->sc_running)
1814 		return (0);
1815 
1816 	/* check if it was automatically removed by firmware */
1817 	error = rsu_cam_read(sc, R92S_CAM_CTL0(keyix), &val);
1818 	if (error == 0 && (val & R92S_CAM_VALID) == 0) {
1819 		RSU_DPRINTF(sc, RSU_DEBUG_KEY,
1820 		    "%s: key %u does not exist\n", __func__, keyix);
1821 		clrbit(sc->keys_bmap, keyix);
1822 		return (0);
1823 	}
1824 
1825 	memset(&key, 0, sizeof(key));
1826 	key.cam_id = keyix;
1827 
1828 	RSU_DPRINTF(sc, RSU_DEBUG_KEY | RSU_DEBUG_FWCMD,
1829 	    "%s: removing key %u\n", __func__, key.cam_id);
1830 
1831 	error = rsu_fw_cmd(sc, R92S_CMD_SET_KEY, &key, sizeof(key));
1832 	if (error != 0) {
1833 		device_printf(sc->sc_dev,
1834 		    "%s: cannot send firmware command, error %d\n",
1835 		    __func__, error);
1836 		goto finish;
1837 	}
1838 
1839 	usb_pause_mtx(&sc->sc_mtx, USB_MS_TO_TICKS(5));
1840 
1841 	/*
1842 	 * Clear 'valid' bit manually (cannot be done via firmware command).
1843 	 * Used for key check + when firmware command cannot be sent.
1844 	 */
1845 finish:
1846 	rsu_cam_write(sc, R92S_CAM_CTL0(keyix), 0);
1847 
1848 	clrbit(sc->keys_bmap, keyix);
1849 
1850 	return (rsu_key_check(sc, keyix, 0));
1851 }
1852 
1853 static void
1854 rsu_delete_key_pair_cb(void *arg, int pending __unused)
1855 {
1856 	struct rsu_softc *sc = arg;
1857 	int i;
1858 
1859 	RSU_DELKEY_BMAP_LOCK(sc);
1860 	for (i = IEEE80211_WEP_NKID; i < R92S_CAM_ENTRY_LIMIT; i++) {
1861 		if (isset(sc->free_keys_bmap, i)) {
1862 			RSU_DELKEY_BMAP_UNLOCK(sc);
1863 
1864 			RSU_LOCK(sc);
1865 			RSU_DPRINTF(sc, RSU_DEBUG_KEY,
1866 			    "%s: calling rsu_delete_key() with keyix = %d\n",
1867 			    __func__, i);
1868 			(void) rsu_delete_key(sc, i);
1869 			RSU_UNLOCK(sc);
1870 
1871 			RSU_DELKEY_BMAP_LOCK(sc);
1872 			clrbit(sc->free_keys_bmap, i);
1873 
1874 			/* bmap can be changed */
1875 			i = IEEE80211_WEP_NKID - 1;
1876 			continue;
1877 		}
1878 	}
1879 	RSU_DELKEY_BMAP_UNLOCK(sc);
1880 }
1881 
1882 static int
1883 rsu_site_survey(struct rsu_softc *sc, struct ieee80211_scan_ssid *ssid)
1884 {
1885 	struct r92s_fw_cmd_sitesurvey cmd;
1886 
1887 	RSU_ASSERT_LOCKED(sc);
1888 
1889 	memset(&cmd, 0, sizeof(cmd));
1890 	/* TODO: passive channels? */
1891 	if (sc->sc_active_scan)
1892 		cmd.active = htole32(1);
1893 	cmd.limit = htole32(48);
1894 
1895 	if (ssid != NULL) {
1896 		sc->sc_extra_scan = 1;
1897 		cmd.ssidlen = htole32(ssid->len);
1898 		memcpy(cmd.ssid, ssid->ssid, ssid->len);
1899 	}
1900 #ifdef USB_DEBUG
1901 	if (rsu_debug & (RSU_DEBUG_SCAN | RSU_DEBUG_FWCMD)) {
1902 		device_printf(sc->sc_dev,
1903 		    "sending site survey command, active %d",
1904 		    le32toh(cmd.active));
1905 		if (ssid != NULL) {
1906 			printf(", ssid: ");
1907 			ieee80211_print_essid(cmd.ssid, le32toh(cmd.ssidlen));
1908 		}
1909 		printf("\n");
1910 	}
1911 #endif
1912 	return (rsu_fw_cmd(sc, R92S_CMD_SITE_SURVEY, &cmd, sizeof(cmd)));
1913 }
1914 
1915 static int
1916 rsu_join_bss(struct rsu_softc *sc, struct ieee80211_node *ni)
1917 {
1918 	struct ieee80211com *ic = &sc->sc_ic;
1919 	struct ieee80211vap *vap = ni->ni_vap;
1920 	struct ndis_wlan_bssid_ex *bss;
1921 	struct ndis_802_11_fixed_ies *fixed;
1922 	struct r92s_fw_cmd_auth auth;
1923 	uint8_t buf[sizeof(*bss) + 128] __aligned(4);
1924 	uint8_t *frm;
1925 	uint8_t opmode;
1926 	int error;
1927 
1928 	RSU_ASSERT_LOCKED(sc);
1929 
1930 	/* Let the FW decide the opmode based on the capinfo field. */
1931 	opmode = NDIS802_11AUTOUNKNOWN;
1932 	RSU_DPRINTF(sc, RSU_DEBUG_RESET,
1933 	    "%s: setting operating mode to %d\n",
1934 	    __func__, opmode);
1935 	error = rsu_fw_cmd(sc, R92S_CMD_SET_OPMODE, &opmode, sizeof(opmode));
1936 	if (error != 0)
1937 		return (error);
1938 
1939 	memset(&auth, 0, sizeof(auth));
1940 	if (vap->iv_flags & IEEE80211_F_WPA) {
1941 		auth.mode = R92S_AUTHMODE_WPA;
1942 		auth.dot1x = (ni->ni_authmode == IEEE80211_AUTH_8021X);
1943 	} else
1944 		auth.mode = R92S_AUTHMODE_OPEN;
1945 	RSU_DPRINTF(sc, RSU_DEBUG_RESET,
1946 	    "%s: setting auth mode to %d\n",
1947 	    __func__, auth.mode);
1948 	error = rsu_fw_cmd(sc, R92S_CMD_SET_AUTH, &auth, sizeof(auth));
1949 	if (error != 0)
1950 		return (error);
1951 
1952 	memset(buf, 0, sizeof(buf));
1953 	bss = (struct ndis_wlan_bssid_ex *)buf;
1954 	IEEE80211_ADDR_COPY(bss->macaddr, ni->ni_bssid);
1955 	bss->ssid.ssidlen = htole32(ni->ni_esslen);
1956 	memcpy(bss->ssid.ssid, ni->ni_essid, ni->ni_esslen);
1957 	if (vap->iv_flags & (IEEE80211_F_PRIVACY | IEEE80211_F_WPA))
1958 		bss->privacy = htole32(1);
1959 	bss->rssi = htole32(ni->ni_avgrssi);
1960 	if (ic->ic_curmode == IEEE80211_MODE_11B)
1961 		bss->networktype = htole32(NDIS802_11DS);
1962 	else
1963 		bss->networktype = htole32(NDIS802_11OFDM24);
1964 	bss->config.len = htole32(sizeof(bss->config));
1965 	bss->config.bintval = htole32(ni->ni_intval);
1966 	bss->config.dsconfig = htole32(ieee80211_chan2ieee(ic, ni->ni_chan));
1967 	bss->inframode = htole32(NDIS802_11INFRASTRUCTURE);
1968 	/* XXX verify how this is supposed to look! */
1969 	memcpy(bss->supprates, ni->ni_rates.rs_rates,
1970 	    ni->ni_rates.rs_nrates);
1971 	/* Write the fixed fields of the beacon frame. */
1972 	fixed = (struct ndis_802_11_fixed_ies *)&bss[1];
1973 	memcpy(&fixed->tstamp, ni->ni_tstamp.data, 8);
1974 	fixed->bintval = htole16(ni->ni_intval);
1975 	fixed->capabilities = htole16(ni->ni_capinfo);
1976 	/* Write IEs to be included in the association request. */
1977 	frm = (uint8_t *)&fixed[1];
1978 	frm = ieee80211_add_rsn(frm, vap);
1979 	frm = ieee80211_add_wpa(frm, vap);
1980 	frm = ieee80211_add_qos(frm, ni);
1981 	if ((ic->ic_flags & IEEE80211_F_WME) &&
1982 	    (ni->ni_ies.wme_ie != NULL))
1983 		frm = ieee80211_add_wme_info(frm, &ic->ic_wme, ni);
1984 	if (ni->ni_flags & IEEE80211_NODE_HT) {
1985 		frm = ieee80211_add_htcap(frm, ni);
1986 		frm = ieee80211_add_htinfo(frm, ni);
1987 	}
1988 	bss->ieslen = htole32(frm - (uint8_t *)fixed);
1989 	bss->len = htole32(((frm - buf) + 3) & ~3);
1990 	RSU_DPRINTF(sc, RSU_DEBUG_RESET | RSU_DEBUG_FWCMD,
1991 	    "%s: sending join bss command to %s chan %d\n",
1992 	    __func__,
1993 	    ether_sprintf(bss->macaddr), le32toh(bss->config.dsconfig));
1994 	return (rsu_fw_cmd(sc, R92S_CMD_JOIN_BSS, buf, sizeof(buf)));
1995 }
1996 
1997 static int
1998 rsu_disconnect(struct rsu_softc *sc)
1999 {
2000 	uint32_t zero = 0;	/* :-) */
2001 
2002 	/* Disassociate from our current BSS. */
2003 	RSU_DPRINTF(sc, RSU_DEBUG_STATE | RSU_DEBUG_FWCMD,
2004 	    "%s: sending disconnect command\n", __func__);
2005 	return (rsu_fw_cmd(sc, R92S_CMD_DISCONNECT, &zero, sizeof(zero)));
2006 }
2007 
2008 /*
2009  * Map the hardware provided RSSI value to a signal level.
2010  * For the most part it's just something we divide by and cap
2011  * so it doesn't overflow the representation by net80211.
2012  */
2013 static int
2014 rsu_hwrssi_to_rssi(struct rsu_softc *sc, int hw_rssi)
2015 {
2016 	int v;
2017 
2018 	if (hw_rssi == 0)
2019 		return (0);
2020 	v = hw_rssi >> 4;
2021 	if (v > 80)
2022 		v = 80;
2023 	return (v);
2024 }
2025 
2026 CTASSERT(MCLBYTES > sizeof(struct ieee80211_frame));
2027 
2028 static void
2029 rsu_event_survey(struct rsu_softc *sc, uint8_t *buf, int len)
2030 {
2031 	struct ieee80211com *ic = &sc->sc_ic;
2032 	struct ieee80211_frame *wh;
2033 	struct ndis_wlan_bssid_ex *bss;
2034 	struct ieee80211_rx_stats rxs;
2035 	struct mbuf *m;
2036 	uint32_t ieslen;
2037 	uint32_t pktlen;
2038 
2039 	if (__predict_false(len < sizeof(*bss)))
2040 		return;
2041 	bss = (struct ndis_wlan_bssid_ex *)buf;
2042 	ieslen = le32toh(bss->ieslen);
2043 	/* range check length of information element */
2044 	if (__predict_false(ieslen > (uint32_t)(len - sizeof(*bss))))
2045 		return;
2046 
2047 	RSU_DPRINTF(sc, RSU_DEBUG_SCAN,
2048 	    "%s: found BSS %s: len=%d chan=%d inframode=%d "
2049 	    "networktype=%d privacy=%d, RSSI=%d\n",
2050 	    __func__,
2051 	    ether_sprintf(bss->macaddr), ieslen,
2052 	    le32toh(bss->config.dsconfig), le32toh(bss->inframode),
2053 	    le32toh(bss->networktype), le32toh(bss->privacy),
2054 	    le32toh(bss->rssi));
2055 
2056 	/* Build a fake beacon frame to let net80211 do all the parsing. */
2057 	/* XXX TODO: just call the new scan API methods! */
2058 	if (__predict_false(ieslen > (size_t)(MCLBYTES - sizeof(*wh))))
2059 		return;
2060 	pktlen = sizeof(*wh) + ieslen;
2061 	m = m_get2(pktlen, M_NOWAIT, MT_DATA, M_PKTHDR);
2062 	if (__predict_false(m == NULL))
2063 		return;
2064 	wh = mtod(m, struct ieee80211_frame *);
2065 	wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | IEEE80211_FC0_TYPE_MGT |
2066 	    IEEE80211_FC0_SUBTYPE_BEACON;
2067 	wh->i_fc[1] = IEEE80211_FC1_DIR_NODS;
2068 	USETW(wh->i_dur, 0);
2069 	IEEE80211_ADDR_COPY(wh->i_addr1, ieee80211broadcastaddr);
2070 	IEEE80211_ADDR_COPY(wh->i_addr2, bss->macaddr);
2071 	IEEE80211_ADDR_COPY(wh->i_addr3, bss->macaddr);
2072 	*(uint16_t *)wh->i_seq = 0;
2073 	memcpy(&wh[1], (uint8_t *)&bss[1], ieslen);
2074 
2075 	/* Finalize mbuf. */
2076 	m->m_pkthdr.len = m->m_len = pktlen;
2077 
2078 	/* Set channel flags for input path */
2079 	bzero(&rxs, sizeof(rxs));
2080 	rxs.r_flags |= IEEE80211_R_IEEE | IEEE80211_R_FREQ;
2081 	rxs.r_flags |= IEEE80211_R_BAND;
2082 	rxs.r_flags |= IEEE80211_R_NF | IEEE80211_R_RSSI;
2083 	rxs.c_ieee = le32toh(bss->config.dsconfig);
2084 	rxs.c_freq = ieee80211_ieee2mhz(rxs.c_ieee, IEEE80211_CHAN_2GHZ);
2085 	rxs.c_band = IEEE80211_CHAN_2GHZ;
2086 	/* This is a number from 0..100; so let's just divide it down a bit */
2087 	rxs.c_rssi = le32toh(bss->rssi) / 2;
2088 	rxs.c_nf = -96;
2089 	if (ieee80211_add_rx_params(m, &rxs) == 0)
2090 		return;
2091 
2092 	/* XXX avoid a LOR */
2093 	RSU_UNLOCK(sc);
2094 	ieee80211_input_mimo_all(ic, m);
2095 	RSU_LOCK(sc);
2096 }
2097 
2098 static void
2099 rsu_event_join_bss(struct rsu_softc *sc, uint8_t *buf, int len)
2100 {
2101 	struct ieee80211com *ic = &sc->sc_ic;
2102 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2103 	struct ieee80211_node *ni = vap->iv_bss;
2104 	struct r92s_event_join_bss *rsp;
2105 	uint32_t tmp;
2106 	int res;
2107 
2108 	if (__predict_false(len < sizeof(*rsp)))
2109 		return;
2110 	rsp = (struct r92s_event_join_bss *)buf;
2111 	res = (int)le32toh(rsp->join_res);
2112 
2113 	RSU_DPRINTF(sc, RSU_DEBUG_STATE | RSU_DEBUG_FWCMD,
2114 	    "%s: Rx join BSS event len=%d res=%d\n",
2115 	    __func__, len, res);
2116 
2117 	/*
2118 	 * XXX Don't do this; there's likely a better way to tell
2119 	 * the caller we failed.
2120 	 */
2121 	if (res <= 0) {
2122 		RSU_UNLOCK(sc);
2123 		ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
2124 		RSU_LOCK(sc);
2125 		return;
2126 	}
2127 
2128 	tmp = le32toh(rsp->associd);
2129 	if (tmp >= vap->iv_max_aid) {
2130 		RSU_DPRINTF(sc, RSU_DEBUG_ANY, "Assoc ID overflow\n");
2131 		tmp = 1;
2132 	}
2133 	RSU_DPRINTF(sc, RSU_DEBUG_STATE | RSU_DEBUG_FWCMD,
2134 	    "%s: associated with %s associd=%d\n",
2135 	    __func__, ether_sprintf(rsp->bss.macaddr), tmp);
2136 	/* XXX is this required? What's the top two bits for again? */
2137 	ni->ni_associd = tmp | 0xc000;
2138 
2139 	/* Refresh Rx filter (was changed by firmware). */
2140 	sc->sc_vap_is_running = 1;
2141 	rsu_rxfilter_refresh(sc);
2142 
2143 	RSU_UNLOCK(sc);
2144 	ieee80211_new_state(vap, IEEE80211_S_RUN,
2145 	    IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
2146 	RSU_LOCK(sc);
2147 }
2148 
2149 static void
2150 rsu_event_addba_req_report(struct rsu_softc *sc, uint8_t *buf, int len)
2151 {
2152 	struct ieee80211com *ic = &sc->sc_ic;
2153 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2154 	struct r92s_add_ba_event *ba = (void *) buf;
2155 	struct ieee80211_node *ni;
2156 
2157 	if (len < sizeof(*ba)) {
2158 		device_printf(sc->sc_dev, "%s: short read (%d)\n", __func__, len);
2159 		return;
2160 	}
2161 
2162 	if (vap == NULL)
2163 		return;
2164 
2165 	RSU_DPRINTF(sc, RSU_DEBUG_AMPDU, "%s: mac=%s, tid=%d, ssn=%d\n",
2166 	    __func__,
2167 	    ether_sprintf(ba->mac_addr),
2168 	    (int) ba->tid,
2169 	    (int) le16toh(ba->ssn));
2170 
2171 	/* XXX do node lookup; this is STA specific */
2172 
2173 	ni = ieee80211_ref_node(vap->iv_bss);
2174 	ieee80211_ampdu_rx_start_ext(ni, ba->tid, le16toh(ba->ssn) >> 4, 32);
2175 	ieee80211_free_node(ni);
2176 }
2177 
2178 static void
2179 rsu_rx_event(struct rsu_softc *sc, uint8_t code, uint8_t *buf, int len)
2180 {
2181 	struct ieee80211com *ic = &sc->sc_ic;
2182 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
2183 
2184 	RSU_DPRINTF(sc, RSU_DEBUG_RX | RSU_DEBUG_FWCMD,
2185 	    "%s: Rx event code=%d len=%d\n", __func__, code, len);
2186 	switch (code) {
2187 	case R92S_EVT_SURVEY:
2188 		rsu_event_survey(sc, buf, len);
2189 		break;
2190 	case R92S_EVT_SURVEY_DONE:
2191 		RSU_DPRINTF(sc, RSU_DEBUG_SCAN,
2192 		    "%s: %s scan done, found %d BSS\n",
2193 		    __func__, sc->sc_extra_scan ? "direct" : "broadcast",
2194 		    le32toh(*(uint32_t *)buf));
2195 		if (sc->sc_extra_scan == 1) {
2196 			/* Send broadcast probe request. */
2197 			sc->sc_extra_scan = 0;
2198 			if (vap != NULL && rsu_site_survey(sc, NULL) != 0) {
2199 				RSU_UNLOCK(sc);
2200 				ieee80211_cancel_scan(vap);
2201 				RSU_LOCK(sc);
2202 			}
2203 			break;
2204 		}
2205 		if (vap != NULL) {
2206 			RSU_UNLOCK(sc);
2207 			ieee80211_scan_done(vap);
2208 			RSU_LOCK(sc);
2209 		}
2210 		break;
2211 	case R92S_EVT_JOIN_BSS:
2212 		if (vap->iv_state == IEEE80211_S_AUTH)
2213 			rsu_event_join_bss(sc, buf, len);
2214 		break;
2215 	case R92S_EVT_DEL_STA:
2216 		RSU_DPRINTF(sc, RSU_DEBUG_FWCMD | RSU_DEBUG_STATE,
2217 		    "%s: disassociated from %s\n", __func__,
2218 		    ether_sprintf(buf));
2219 		if (vap->iv_state == IEEE80211_S_RUN &&
2220 		    IEEE80211_ADDR_EQ(vap->iv_bss->ni_bssid, buf)) {
2221 			RSU_UNLOCK(sc);
2222 			ieee80211_new_state(vap, IEEE80211_S_SCAN, -1);
2223 			RSU_LOCK(sc);
2224 		}
2225 		break;
2226 	case R92S_EVT_WPS_PBC:
2227 		RSU_DPRINTF(sc, RSU_DEBUG_RX | RSU_DEBUG_FWCMD,
2228 		    "%s: WPS PBC pushed.\n", __func__);
2229 		break;
2230 	case R92S_EVT_FWDBG:
2231 		buf[60] = '\0';
2232 		RSU_DPRINTF(sc, RSU_DEBUG_FWDBG, "FWDBG: %s\n", (char *)buf);
2233 		break;
2234 	case R92S_EVT_ADDBA_REQ_REPORT:
2235 		rsu_event_addba_req_report(sc, buf, len);
2236 		break;
2237 	default:
2238 		device_printf(sc->sc_dev, "%s: unhandled code (%d)\n", __func__, code);
2239 		break;
2240 	}
2241 }
2242 
2243 static void
2244 rsu_rx_multi_event(struct rsu_softc *sc, uint8_t *buf, int len)
2245 {
2246 	struct r92s_fw_cmd_hdr *cmd;
2247 	int cmdsz;
2248 
2249 	RSU_DPRINTF(sc, RSU_DEBUG_RX, "%s: Rx events len=%d\n", __func__, len);
2250 
2251 	/* Skip Rx status. */
2252 	buf += sizeof(struct r92s_rx_stat);
2253 	len -= sizeof(struct r92s_rx_stat);
2254 
2255 	/* Process all events. */
2256 	for (;;) {
2257 		/* Check that command header fits. */
2258 		if (__predict_false(len < sizeof(*cmd)))
2259 			break;
2260 		cmd = (struct r92s_fw_cmd_hdr *)buf;
2261 		/* Check that command payload fits. */
2262 		cmdsz = le16toh(cmd->len);
2263 		if (__predict_false(len < sizeof(*cmd) + cmdsz))
2264 			break;
2265 
2266 		/* Process firmware event. */
2267 		rsu_rx_event(sc, cmd->code, (uint8_t *)&cmd[1], cmdsz);
2268 
2269 		if (!(cmd->seq & R92S_FW_CMD_MORE))
2270 			break;
2271 		buf += sizeof(*cmd) + cmdsz;
2272 		len -= sizeof(*cmd) + cmdsz;
2273 	}
2274 }
2275 
2276 static int8_t
2277 rsu_get_rssi(struct rsu_softc *sc, int rate, void *physt)
2278 {
2279 	static const int8_t cckoff[] = { 14, -2, -20, -40 };
2280 	struct r92s_rx_phystat *phy;
2281 	struct r92s_rx_cck *cck;
2282 	uint8_t rpt;
2283 	int8_t rssi;
2284 
2285 	if (rate <= 3) {
2286 		cck = (struct r92s_rx_cck *)physt;
2287 		rpt = (cck->agc_rpt >> 6) & 0x3;
2288 		rssi = cck->agc_rpt & 0x3e;
2289 		rssi = cckoff[rpt] - rssi;
2290 	} else {	/* OFDM/HT. */
2291 		phy = (struct r92s_rx_phystat *)physt;
2292 		rssi = ((le32toh(phy->phydw1) >> 1) & 0x7f) - 106;
2293 	}
2294 	return (rssi);
2295 }
2296 
2297 static struct mbuf *
2298 rsu_rx_copy_to_mbuf(struct rsu_softc *sc, struct r92s_rx_stat *stat,
2299     int totlen)
2300 {
2301 	struct ieee80211com *ic = &sc->sc_ic;
2302 	struct mbuf *m;
2303 	uint32_t rxdw0;
2304 	int pktlen;
2305 
2306 	rxdw0 = le32toh(stat->rxdw0);
2307 	if (__predict_false(rxdw0 & (R92S_RXDW0_CRCERR | R92S_RXDW0_ICVERR))) {
2308 		RSU_DPRINTF(sc, RSU_DEBUG_RX,
2309 		    "%s: RX flags error (%s)\n", __func__,
2310 		    rxdw0 & R92S_RXDW0_CRCERR ? "CRC" : "ICV");
2311 		goto fail;
2312 	}
2313 
2314 	pktlen = MS(rxdw0, R92S_RXDW0_PKTLEN);
2315 	if (__predict_false(pktlen < sizeof (struct ieee80211_frame_ack))) {
2316 		RSU_DPRINTF(sc, RSU_DEBUG_RX,
2317 		    "%s: frame is too short: %d\n", __func__, pktlen);
2318 		goto fail;
2319 	}
2320 
2321 	m = m_get2(totlen, M_NOWAIT, MT_DATA, M_PKTHDR);
2322 	if (__predict_false(m == NULL)) {
2323 		device_printf(sc->sc_dev,
2324 		    "%s: could not allocate RX mbuf, totlen %d\n",
2325 		    __func__, totlen);
2326 		goto fail;
2327 	}
2328 
2329 	/* Finalize mbuf. */
2330 	memcpy(mtod(m, uint8_t *), (uint8_t *)stat, totlen);
2331 	m->m_pkthdr.len = m->m_len = totlen;
2332 
2333 	return (m);
2334 fail:
2335 	counter_u64_add(ic->ic_ierrors, 1);
2336 	return (NULL);
2337 }
2338 
2339 static uint32_t
2340 rsu_get_tsf_low(struct rsu_softc *sc)
2341 {
2342 	return (rsu_read_4(sc, R92S_TSFTR));
2343 }
2344 
2345 static uint32_t
2346 rsu_get_tsf_high(struct rsu_softc *sc)
2347 {
2348 	return (rsu_read_4(sc, R92S_TSFTR + 4));
2349 }
2350 
2351 static struct ieee80211_node *
2352 rsu_rx_frame(struct rsu_softc *sc, struct mbuf *m)
2353 {
2354 	struct ieee80211com *ic = &sc->sc_ic;
2355 	struct ieee80211_frame_min *wh;
2356 	struct ieee80211_rx_stats rxs;
2357 	struct r92s_rx_stat *stat;
2358 	uint32_t rxdw0, rxdw3;
2359 	uint8_t cipher, rate;
2360 	int infosz;
2361 	int rssi;
2362 
2363 	stat = mtod(m, struct r92s_rx_stat *);
2364 	rxdw0 = le32toh(stat->rxdw0);
2365 	rxdw3 = le32toh(stat->rxdw3);
2366 
2367 	rate = MS(rxdw3, R92S_RXDW3_RATE);
2368 	cipher = MS(rxdw0, R92S_RXDW0_CIPHER);
2369 	infosz = MS(rxdw0, R92S_RXDW0_INFOSZ) * 8;
2370 
2371 	/* Get RSSI from PHY status descriptor if present. */
2372 	if (infosz != 0 && (rxdw0 & R92S_RXDW0_PHYST))
2373 		rssi = rsu_get_rssi(sc, rate, &stat[1]);
2374 	else {
2375 		/* Cheat and get the last calibrated RSSI */
2376 		rssi = rsu_hwrssi_to_rssi(sc, sc->sc_currssi);
2377 	}
2378 
2379 	/* Hardware does Rx TCP checksum offload. */
2380 	/*
2381 	 * This flag can be set for some other
2382 	 * (e.g., EAPOL) frame types, so don't rely on it.
2383 	 */
2384 	if (rxdw3 & R92S_RXDW3_TCPCHKVALID) {
2385 		RSU_DPRINTF(sc, RSU_DEBUG_RX,
2386 		    "%s: TCP/IP checksums: %schecked / %schecked\n",
2387 		    __func__,
2388 		    (rxdw3 & R92S_RXDW3_TCPCHKRPT) ? "" : "not ",
2389 		    (rxdw3 & R92S_RXDW3_IPCHKRPT) ? "" : "not ");
2390 
2391 		/*
2392 		 * 'IP header checksum valid' bit will not be set if
2393 		 * the frame was not checked / has incorrect checksum /
2394 		 * does not have checksum (IPv6).
2395 		 *
2396 		 * NB: if DF bit is not set then frame will not be checked.
2397 		 */
2398 		if (rxdw3 & R92S_RXDW3_IPCHKRPT) {
2399 			m->m_pkthdr.csum_flags = CSUM_IP_CHECKED;
2400 			m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
2401 		}
2402 
2403 		/*
2404 		 * This is independent of the above check.
2405 		 */
2406 		if (rxdw3 & R92S_RXDW3_TCPCHKRPT) {
2407 			m->m_pkthdr.csum_flags |= CSUM_DATA_VALID;
2408 			m->m_pkthdr.csum_flags |= CSUM_PSEUDO_HDR;
2409 			m->m_pkthdr.csum_data = 0xffff;
2410 		}
2411 	}
2412 
2413 	/* RX flags */
2414 
2415 	/* Set channel flags for input path */
2416 	bzero(&rxs, sizeof(rxs));
2417 
2418 	/* normal RSSI */
2419 	rxs.r_flags |= IEEE80211_R_NF | IEEE80211_R_RSSI;
2420 	rxs.c_rssi = rssi;
2421 	rxs.c_nf = -96;
2422 
2423 	/* Rate */
2424 	if (rate < 12) {
2425 		rxs.c_rate = ridx2rate[rate];
2426 		if (RSU_RATE_IS_CCK(rate))
2427 			rxs.c_pktflags |= IEEE80211_RX_F_CCK;
2428 		else
2429 			rxs.c_pktflags |= IEEE80211_RX_F_OFDM;
2430 	} else {
2431 		rxs.c_rate = IEEE80211_RATE_MCS | (rate - 12);
2432 		rxs.c_pktflags |= IEEE80211_RX_F_HT;
2433 	}
2434 
2435 	if (ieee80211_radiotap_active(ic)) {
2436 		struct rsu_rx_radiotap_header *tap = &sc->sc_rxtap;
2437 
2438 		/* Map HW rate index to 802.11 rate. */
2439 		tap->wr_flags = 0;		/* TODO */
2440 		tap->wr_tsft = rsu_get_tsf_high(sc);
2441 		if (le32toh(stat->tsf_low) > rsu_get_tsf_low(sc))
2442 			tap->wr_tsft--;
2443 		tap->wr_tsft = (uint64_t)htole32(tap->wr_tsft) << 32;
2444 		tap->wr_tsft += stat->tsf_low;
2445 
2446 		tap->wr_rate = rxs.c_rate;
2447 		tap->wr_dbm_antsignal = rssi;
2448 	};
2449 
2450 	(void) ieee80211_add_rx_params(m, &rxs);
2451 
2452 	/* Drop descriptor. */
2453 	m_adj(m, sizeof(*stat) + infosz);
2454 	wh = mtod(m, struct ieee80211_frame_min *);
2455 	if ((wh->i_fc[1] & IEEE80211_FC1_PROTECTED) &&
2456 	    cipher != R92S_KEY_ALGO_NONE) {
2457 		m->m_flags |= M_WEP;
2458 	}
2459 
2460 	RSU_DPRINTF(sc, RSU_DEBUG_RX,
2461 	    "%s: Rx frame len %d, rate %d, infosz %d\n",
2462 	    __func__, m->m_len, rate, infosz);
2463 
2464 	if (m->m_len >= sizeof(*wh))
2465 		return (ieee80211_find_rxnode(ic, wh));
2466 
2467 	return (NULL);
2468 }
2469 
2470 static struct mbuf *
2471 rsu_rx_multi_frame(struct rsu_softc *sc, uint8_t *buf, int len)
2472 {
2473 	struct r92s_rx_stat *stat;
2474 	uint32_t rxdw0;
2475 	int totlen, pktlen, infosz, npkts;
2476 	struct mbuf *m, *m0 = NULL, *prevm = NULL;
2477 
2478 	/*
2479 	 * don't pass packets to the ieee80211 framework if the driver isn't
2480 	 * RUNNING.
2481 	 */
2482 	if (!sc->sc_running)
2483 		return (NULL);
2484 
2485 	/* Get the number of encapsulated frames. */
2486 	stat = (struct r92s_rx_stat *)buf;
2487 	npkts = MS(le32toh(stat->rxdw2), R92S_RXDW2_PKTCNT);
2488 	RSU_DPRINTF(sc, RSU_DEBUG_RX,
2489 	    "%s: Rx %d frames in one chunk\n", __func__, npkts);
2490 
2491 	/* Process all of them. */
2492 	while (npkts-- > 0) {
2493 		if (__predict_false(len < sizeof(*stat)))
2494 			break;
2495 		stat = (struct r92s_rx_stat *)buf;
2496 		rxdw0 = le32toh(stat->rxdw0);
2497 
2498 		pktlen = MS(rxdw0, R92S_RXDW0_PKTLEN);
2499 		if (__predict_false(pktlen == 0))
2500 			break;
2501 
2502 		infosz = MS(rxdw0, R92S_RXDW0_INFOSZ) * 8;
2503 
2504 		/* Make sure everything fits in xfer. */
2505 		totlen = sizeof(*stat) + infosz + pktlen;
2506 		if (__predict_false(totlen > len))
2507 			break;
2508 
2509 		/* Process 802.11 frame. */
2510 		m = rsu_rx_copy_to_mbuf(sc, stat, totlen);
2511 		if (m0 == NULL)
2512 			m0 = m;
2513 		if (prevm == NULL)
2514 			prevm = m;
2515 		else {
2516 			prevm->m_next = m;
2517 			prevm = m;
2518 		}
2519 		/* Next chunk is 128-byte aligned. */
2520 		totlen = (totlen + 127) & ~127;
2521 		buf += totlen;
2522 		len -= totlen;
2523 	}
2524 
2525 	return (m0);
2526 }
2527 
2528 static struct mbuf *
2529 rsu_rxeof(struct usb_xfer *xfer, struct rsu_data *data)
2530 {
2531 	struct rsu_softc *sc = data->sc;
2532 	struct ieee80211com *ic = &sc->sc_ic;
2533 	struct r92s_rx_stat *stat;
2534 	int len;
2535 
2536 	usbd_xfer_status(xfer, &len, NULL, NULL, NULL);
2537 
2538 	if (__predict_false(len < sizeof(*stat))) {
2539 		RSU_DPRINTF(sc, RSU_DEBUG_RX, "xfer too short %d\n", len);
2540 		counter_u64_add(ic->ic_ierrors, 1);
2541 		return (NULL);
2542 	}
2543 	/* Determine if it is a firmware C2H event or an 802.11 frame. */
2544 	stat = (struct r92s_rx_stat *)data->buf;
2545 	if ((le32toh(stat->rxdw1) & 0x1ff) == 0x1ff) {
2546 		rsu_rx_multi_event(sc, data->buf, len);
2547 		/* No packets to process. */
2548 		return (NULL);
2549 	} else
2550 		return (rsu_rx_multi_frame(sc, data->buf, len));
2551 }
2552 
2553 static void
2554 rsu_bulk_rx_callback(struct usb_xfer *xfer, usb_error_t error)
2555 {
2556 	struct epoch_tracker et;
2557 	struct rsu_softc *sc = usbd_xfer_softc(xfer);
2558 	struct ieee80211com *ic = &sc->sc_ic;
2559 	struct ieee80211_node *ni;
2560 	struct mbuf *m = NULL, *next;
2561 	struct rsu_data *data;
2562 
2563 	RSU_ASSERT_LOCKED(sc);
2564 
2565 	switch (USB_GET_STATE(xfer)) {
2566 	case USB_ST_TRANSFERRED:
2567 		data = STAILQ_FIRST(&sc->sc_rx_active);
2568 		if (data == NULL)
2569 			goto tr_setup;
2570 		STAILQ_REMOVE_HEAD(&sc->sc_rx_active, next);
2571 		m = rsu_rxeof(xfer, data);
2572 		STAILQ_INSERT_TAIL(&sc->sc_rx_inactive, data, next);
2573 		/* FALLTHROUGH */
2574 	case USB_ST_SETUP:
2575 tr_setup:
2576 		data = STAILQ_FIRST(&sc->sc_rx_inactive);
2577 		if (data == NULL) {
2578 			KASSERT(m == NULL, ("mbuf isn't NULL"));
2579 			return;
2580 		}
2581 		STAILQ_REMOVE_HEAD(&sc->sc_rx_inactive, next);
2582 		STAILQ_INSERT_TAIL(&sc->sc_rx_active, data, next);
2583 		usbd_xfer_set_frame_data(xfer, 0, data->buf,
2584 		    usbd_xfer_max_len(xfer));
2585 		usbd_transfer_submit(xfer);
2586 		/*
2587 		 * To avoid LOR we should unlock our private mutex here to call
2588 		 * ieee80211_input() because here is at the end of a USB
2589 		 * callback and safe to unlock.
2590 		 */
2591 		NET_EPOCH_ENTER(et);
2592 		while (m != NULL) {
2593 			next = m->m_next;
2594 			m->m_next = NULL;
2595 
2596 			ni = rsu_rx_frame(sc, m);
2597 			RSU_UNLOCK(sc);
2598 
2599 			if (ni != NULL) {
2600 				if (ni->ni_flags & IEEE80211_NODE_HT)
2601 					m->m_flags |= M_AMPDU;
2602 				(void)ieee80211_input_mimo(ni, m);
2603 				ieee80211_free_node(ni);
2604 			} else
2605 				(void)ieee80211_input_mimo_all(ic, m);
2606 
2607 			RSU_LOCK(sc);
2608 			m = next;
2609 		}
2610 		NET_EPOCH_EXIT(et);
2611 		break;
2612 	default:
2613 		/* needs it to the inactive queue due to a error. */
2614 		data = STAILQ_FIRST(&sc->sc_rx_active);
2615 		if (data != NULL) {
2616 			STAILQ_REMOVE_HEAD(&sc->sc_rx_active, next);
2617 			STAILQ_INSERT_TAIL(&sc->sc_rx_inactive, data, next);
2618 		}
2619 		if (error != USB_ERR_CANCELLED) {
2620 			usbd_xfer_set_stall(xfer);
2621 			counter_u64_add(ic->ic_ierrors, 1);
2622 			goto tr_setup;
2623 		}
2624 		break;
2625 	}
2626 
2627 }
2628 
2629 static void
2630 rsu_txeof(struct usb_xfer *xfer, struct rsu_data *data)
2631 {
2632 #ifdef	USB_DEBUG
2633 	struct rsu_softc *sc = usbd_xfer_softc(xfer);
2634 #endif
2635 
2636 	RSU_DPRINTF(sc, RSU_DEBUG_TXDONE, "%s: called; data=%p\n",
2637 	    __func__,
2638 	    data);
2639 
2640 	if (data->m) {
2641 		/* XXX status? */
2642 		ieee80211_tx_complete(data->ni, data->m, 0);
2643 		data->m = NULL;
2644 		data->ni = NULL;
2645 	}
2646 }
2647 
2648 static void
2649 rsu_bulk_tx_callback_sub(struct usb_xfer *xfer, usb_error_t error,
2650     uint8_t which)
2651 {
2652 	struct rsu_softc *sc = usbd_xfer_softc(xfer);
2653 	struct ieee80211com *ic = &sc->sc_ic;
2654 	struct rsu_data *data;
2655 
2656 	RSU_ASSERT_LOCKED(sc);
2657 
2658 	switch (USB_GET_STATE(xfer)) {
2659 	case USB_ST_TRANSFERRED:
2660 		data = STAILQ_FIRST(&sc->sc_tx_active[which]);
2661 		if (data == NULL)
2662 			goto tr_setup;
2663 		RSU_DPRINTF(sc, RSU_DEBUG_TXDONE, "%s: transfer done %p\n",
2664 		    __func__, data);
2665 		STAILQ_REMOVE_HEAD(&sc->sc_tx_active[which], next);
2666 		rsu_txeof(xfer, data);
2667 		rsu_freebuf(sc, data);
2668 		/* FALLTHROUGH */
2669 	case USB_ST_SETUP:
2670 tr_setup:
2671 		data = STAILQ_FIRST(&sc->sc_tx_pending[which]);
2672 		if (data == NULL) {
2673 			RSU_DPRINTF(sc, RSU_DEBUG_TXDONE,
2674 			    "%s: empty pending queue sc %p\n", __func__, sc);
2675 			return;
2676 		}
2677 		STAILQ_REMOVE_HEAD(&sc->sc_tx_pending[which], next);
2678 		STAILQ_INSERT_TAIL(&sc->sc_tx_active[which], data, next);
2679 		usbd_xfer_set_frame_data(xfer, 0, data->buf, data->buflen);
2680 		RSU_DPRINTF(sc, RSU_DEBUG_TXDONE,
2681 		    "%s: submitting transfer %p\n",
2682 		    __func__,
2683 		    data);
2684 		usbd_transfer_submit(xfer);
2685 		break;
2686 	default:
2687 		data = STAILQ_FIRST(&sc->sc_tx_active[which]);
2688 		if (data != NULL) {
2689 			STAILQ_REMOVE_HEAD(&sc->sc_tx_active[which], next);
2690 			rsu_txeof(xfer, data);
2691 			rsu_freebuf(sc, data);
2692 		}
2693 		counter_u64_add(ic->ic_oerrors, 1);
2694 
2695 		if (error != USB_ERR_CANCELLED) {
2696 			usbd_xfer_set_stall(xfer);
2697 			goto tr_setup;
2698 		}
2699 		break;
2700 	}
2701 
2702 	/*
2703 	 * XXX TODO: if the queue is low, flush out FF TX frames.
2704 	 * Remember to unlock the driver for now; net80211 doesn't
2705 	 * defer it for us.
2706 	 */
2707 }
2708 
2709 static void
2710 rsu_bulk_tx_callback_be_bk(struct usb_xfer *xfer, usb_error_t error)
2711 {
2712 	struct rsu_softc *sc = usbd_xfer_softc(xfer);
2713 
2714 	rsu_bulk_tx_callback_sub(xfer, error, RSU_BULK_TX_BE_BK);
2715 
2716 	/* This kicks the TX taskqueue */
2717 	rsu_start(sc);
2718 }
2719 
2720 static void
2721 rsu_bulk_tx_callback_vi_vo(struct usb_xfer *xfer, usb_error_t error)
2722 {
2723 	struct rsu_softc *sc = usbd_xfer_softc(xfer);
2724 
2725 	rsu_bulk_tx_callback_sub(xfer, error, RSU_BULK_TX_VI_VO);
2726 
2727 	/* This kicks the TX taskqueue */
2728 	rsu_start(sc);
2729 }
2730 
2731 static void
2732 rsu_bulk_tx_callback_h2c(struct usb_xfer *xfer, usb_error_t error)
2733 {
2734 	struct rsu_softc *sc = usbd_xfer_softc(xfer);
2735 
2736 	rsu_bulk_tx_callback_sub(xfer, error, RSU_BULK_TX_H2C);
2737 
2738 	/* This kicks the TX taskqueue */
2739 	rsu_start(sc);
2740 }
2741 
2742 /*
2743  * Transmit the given frame.
2744  *
2745  * This doesn't free the node or mbuf upon failure.
2746  */
2747 static int
2748 rsu_tx_start(struct rsu_softc *sc, struct ieee80211_node *ni,
2749     struct mbuf *m0, struct rsu_data *data)
2750 {
2751 	const struct ieee80211_txparam *tp = ni->ni_txparms;
2752         struct ieee80211vap *vap = ni->ni_vap;
2753 	struct ieee80211_frame *wh;
2754 	struct ieee80211_key *k = NULL;
2755 	struct r92s_tx_desc *txd;
2756 	uint8_t rate, ridx, type, cipher, qos;
2757 	int prio = 0;
2758 	uint8_t which;
2759 	int hasqos;
2760 	int ismcast;
2761 	int xferlen;
2762 	int qid;
2763 
2764 	RSU_ASSERT_LOCKED(sc);
2765 
2766 	wh = mtod(m0, struct ieee80211_frame *);
2767 	type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
2768 	ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
2769 
2770 	RSU_DPRINTF(sc, RSU_DEBUG_TX, "%s: data=%p, m=%p\n",
2771 	    __func__, data, m0);
2772 
2773 	/* Choose a TX rate index. */
2774 	if (type == IEEE80211_FC0_TYPE_MGT ||
2775 	    type == IEEE80211_FC0_TYPE_CTL ||
2776 	    (m0->m_flags & M_EAPOL) != 0)
2777 		rate = tp->mgmtrate;
2778 	else if (ismcast)
2779 		rate = tp->mcastrate;
2780 	else if (tp->ucastrate != IEEE80211_FIXED_RATE_NONE)
2781 		rate = tp->ucastrate;
2782 	else
2783 		rate = 0;
2784 
2785 	if (rate != 0)
2786 		ridx = rate2ridx(rate);
2787 
2788 	if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
2789 		k = ieee80211_crypto_encap(ni, m0);
2790 		if (k == NULL) {
2791 			device_printf(sc->sc_dev,
2792 			    "ieee80211_crypto_encap returns NULL.\n");
2793 			/* XXX we don't expect the fragmented frames */
2794 			return (ENOBUFS);
2795 		}
2796 		wh = mtod(m0, struct ieee80211_frame *);
2797 	}
2798 	/* If we have QoS then use it */
2799 	/* XXX TODO: mbuf WME/PRI versus TID? */
2800 	if (IEEE80211_QOS_HAS_SEQ(wh)) {
2801 		/* Has QoS */
2802 		prio = M_WME_GETAC(m0);
2803 		which = rsu_wme_ac_xfer_map[prio];
2804 		hasqos = 1;
2805 		qos = ((const struct ieee80211_qosframe *)wh)->i_qos[0];
2806 	} else {
2807 		/* Non-QoS TID */
2808 		/* XXX TODO: tid=0 for non-qos TID? */
2809 		which = rsu_wme_ac_xfer_map[WME_AC_BE];
2810 		hasqos = 0;
2811 		prio = 0;
2812 		qos = 0;
2813 	}
2814 
2815 	qid = rsu_ac2qid[prio];
2816 #if 0
2817 	switch (type) {
2818 	case IEEE80211_FC0_TYPE_CTL:
2819 	case IEEE80211_FC0_TYPE_MGT:
2820 		which = rsu_wme_ac_xfer_map[WME_AC_VO];
2821 		break;
2822 	default:
2823 		which = rsu_wme_ac_xfer_map[M_WME_GETAC(m0)];
2824 		break;
2825 	}
2826 	hasqos = 0;
2827 #endif
2828 
2829 	RSU_DPRINTF(sc, RSU_DEBUG_TX, "%s: pri=%d, which=%d, hasqos=%d\n",
2830 	    __func__,
2831 	    prio,
2832 	    which,
2833 	    hasqos);
2834 
2835 	/* Fill Tx descriptor. */
2836 	txd = (struct r92s_tx_desc *)data->buf;
2837 	memset(txd, 0, sizeof(*txd));
2838 
2839 	txd->txdw0 |= htole32(
2840 	    SM(R92S_TXDW0_PKTLEN, m0->m_pkthdr.len) |
2841 	    SM(R92S_TXDW0_OFFSET, sizeof(*txd)) |
2842 	    R92S_TXDW0_OWN | R92S_TXDW0_FSG | R92S_TXDW0_LSG);
2843 
2844 	txd->txdw1 |= htole32(
2845 	    SM(R92S_TXDW1_MACID, R92S_MACID_BSS) | SM(R92S_TXDW1_QSEL, qid));
2846 	if (!hasqos)
2847 		txd->txdw1 |= htole32(R92S_TXDW1_NONQOS);
2848 	if (k != NULL && !(k->wk_flags & IEEE80211_KEY_SWENCRYPT)) {
2849 		switch (k->wk_cipher->ic_cipher) {
2850 		case IEEE80211_CIPHER_WEP:
2851 			cipher = R92S_TXDW1_CIPHER_WEP;
2852 			break;
2853 		case IEEE80211_CIPHER_TKIP:
2854 			cipher = R92S_TXDW1_CIPHER_TKIP;
2855 			break;
2856 		case IEEE80211_CIPHER_AES_CCM:
2857 			cipher = R92S_TXDW1_CIPHER_AES;
2858 			break;
2859 		default:
2860 			cipher = R92S_TXDW1_CIPHER_NONE;
2861 		}
2862 		txd->txdw1 |= htole32(
2863 		    SM(R92S_TXDW1_CIPHER, cipher) |
2864 		    SM(R92S_TXDW1_KEYIDX, k->wk_keyix));
2865 	}
2866 	/* XXX todo: set AGGEN bit if appropriate? */
2867 	txd->txdw2 |= htole32(R92S_TXDW2_BK);
2868 	if (ismcast)
2869 		txd->txdw2 |= htole32(R92S_TXDW2_BMCAST);
2870 
2871 	if (!ismcast && (!qos || (qos & IEEE80211_QOS_ACKPOLICY) !=
2872 	    IEEE80211_QOS_ACKPOLICY_NOACK)) {
2873 		txd->txdw2 |= htole32(R92S_TXDW2_RTY_LMT_ENA);
2874 		txd->txdw2 |= htole32(SM(R92S_TXDW2_RTY_LMT, tp->maxretry));
2875 	}
2876 
2877 	/* Force mgmt / mcast / ucast rate if needed. */
2878 	if (rate != 0) {
2879 		/* Data rate fallback limit (max). */
2880 		txd->txdw5 |= htole32(SM(R92S_TXDW5_DATARATE_FB_LMT, 0x1f));
2881 		txd->txdw5 |= htole32(SM(R92S_TXDW5_DATARATE, ridx));
2882 		txd->txdw4 |= htole32(R92S_TXDW4_DRVRATE);
2883 	}
2884 
2885 	/*
2886 	 * Firmware will use and increment the sequence number for the
2887 	 * specified priority.
2888 	 */
2889 	txd->txdw3 |= htole32(SM(R92S_TXDW3_SEQ, prio));
2890 
2891 	if (ieee80211_radiotap_active_vap(vap)) {
2892 		struct rsu_tx_radiotap_header *tap = &sc->sc_txtap;
2893 
2894 		tap->wt_flags = 0;
2895 		ieee80211_radiotap_tx(vap, m0);
2896 	}
2897 
2898 	xferlen = sizeof(*txd) + m0->m_pkthdr.len;
2899 	KASSERT(xferlen <= RSU_TXBUFSZ, ("%s: invalid length", __func__));
2900 	m_copydata(m0, 0, m0->m_pkthdr.len, (caddr_t)&txd[1]);
2901 
2902 	data->buflen = xferlen;
2903 	data->ni = ni;
2904 	data->m = m0;
2905 	STAILQ_INSERT_TAIL(&sc->sc_tx_pending[which], data, next);
2906 
2907 	/* start transfer, if any */
2908 	usbd_transfer_start(sc->sc_xfer[which]);
2909 	return (0);
2910 }
2911 
2912 static int
2913 rsu_transmit(struct ieee80211com *ic, struct mbuf *m)
2914 {
2915 	struct rsu_softc *sc = ic->ic_softc;
2916 	int error;
2917 
2918 	RSU_LOCK(sc);
2919 	if (!sc->sc_running) {
2920 		RSU_UNLOCK(sc);
2921 		return (ENXIO);
2922 	}
2923 
2924 	/*
2925 	 * XXX TODO: ensure that we treat 'm' as a list of frames
2926 	 * to transmit!
2927 	 */
2928 	error = mbufq_enqueue(&sc->sc_snd, m);
2929 	if (error) {
2930 		RSU_DPRINTF(sc, RSU_DEBUG_TX,
2931 		    "%s: mbufq_enable: failed (%d)\n",
2932 		    __func__,
2933 		    error);
2934 		RSU_UNLOCK(sc);
2935 		return (error);
2936 	}
2937 	RSU_UNLOCK(sc);
2938 
2939 	/* This kicks the TX taskqueue */
2940 	rsu_start(sc);
2941 
2942 	return (0);
2943 }
2944 
2945 static void
2946 rsu_drain_mbufq(struct rsu_softc *sc)
2947 {
2948 	struct mbuf *m;
2949 	struct ieee80211_node *ni;
2950 
2951 	RSU_ASSERT_LOCKED(sc);
2952 	while ((m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
2953 		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
2954 		m->m_pkthdr.rcvif = NULL;
2955 		ieee80211_free_node(ni);
2956 		m_freem(m);
2957 	}
2958 }
2959 
2960 static void
2961 _rsu_start(struct rsu_softc *sc)
2962 {
2963 	struct ieee80211_node *ni;
2964 	struct rsu_data *bf;
2965 	struct mbuf *m;
2966 
2967 	RSU_ASSERT_LOCKED(sc);
2968 
2969 	while ((m = mbufq_dequeue(&sc->sc_snd)) != NULL) {
2970 		bf = rsu_getbuf(sc);
2971 		if (bf == NULL) {
2972 			RSU_DPRINTF(sc, RSU_DEBUG_TX,
2973 			    "%s: failed to get buffer\n", __func__);
2974 			mbufq_prepend(&sc->sc_snd, m);
2975 			break;
2976 		}
2977 
2978 		ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
2979 		m->m_pkthdr.rcvif = NULL;
2980 
2981 		if (rsu_tx_start(sc, ni, m, bf) != 0) {
2982 			RSU_DPRINTF(sc, RSU_DEBUG_TX,
2983 			    "%s: failed to transmit\n", __func__);
2984 			if_inc_counter(ni->ni_vap->iv_ifp,
2985 			    IFCOUNTER_OERRORS, 1);
2986 			rsu_freebuf(sc, bf);
2987 			ieee80211_free_node(ni);
2988 			m_freem(m);
2989 			break;
2990 		}
2991 	}
2992 }
2993 
2994 static void
2995 rsu_start(struct rsu_softc *sc)
2996 {
2997 
2998 	taskqueue_enqueue(taskqueue_thread, &sc->tx_task);
2999 }
3000 
3001 static int
3002 rsu_ioctl_net(struct ieee80211com *ic, u_long cmd, void *data)
3003 {
3004 	struct rsu_softc *sc = ic->ic_softc;
3005 	struct ifreq *ifr = (struct ifreq *)data;
3006 	int error;
3007 
3008 	error = 0;
3009 	switch (cmd) {
3010 	case SIOCSIFCAP:
3011 	{
3012 		struct ieee80211vap *vap;
3013 		int rxmask;
3014 
3015 		rxmask = ifr->ifr_reqcap & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
3016 
3017 		RSU_LOCK(sc);
3018 		/* Both RXCSUM bits must be set (or unset). */
3019 		if (sc->sc_rx_checksum_enable &&
3020 		    rxmask != (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
3021 			rxmask = 0;
3022 			sc->sc_rx_checksum_enable = 0;
3023 			rsu_rxfilter_set(sc, R92S_RCR_TCP_OFFLD_EN, 0);
3024 		} else if (!sc->sc_rx_checksum_enable && rxmask != 0) {
3025 			rxmask = IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6;
3026 			sc->sc_rx_checksum_enable = 1;
3027 			rsu_rxfilter_set(sc, 0, R92S_RCR_TCP_OFFLD_EN);
3028 		} else {
3029 			/* Nothing to do. */
3030 			RSU_UNLOCK(sc);
3031 			break;
3032 		}
3033 		RSU_UNLOCK(sc);
3034 
3035 		IEEE80211_LOCK(ic);	/* XXX */
3036 		TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
3037 			if_t ifp = vap->iv_ifp;
3038 
3039 			if_setcapenablebit(ifp, 0,
3040 			    IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
3041 			if_setcapenablebit(ifp, rxmask, 0);
3042 		}
3043 		IEEE80211_UNLOCK(ic);
3044 		break;
3045 	}
3046 	default:
3047 		error = ENOTTY;		/* for net80211 */
3048 		break;
3049 	}
3050 
3051 	return (error);
3052 }
3053 
3054 static void
3055 rsu_parent(struct ieee80211com *ic)
3056 {
3057 	struct rsu_softc *sc = ic->ic_softc;
3058 
3059 	if (ic->ic_nrunning > 0) {
3060 		if (rsu_init(sc) == 0)
3061 			ieee80211_start_all(ic);
3062 		else {
3063 			struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3064 			if (vap != NULL)
3065 				ieee80211_stop(vap);
3066 		}
3067 	} else
3068 		rsu_stop(sc);
3069 }
3070 
3071 /*
3072  * Power on sequence for A-cut adapters.
3073  */
3074 static void
3075 rsu_power_on_acut(struct rsu_softc *sc)
3076 {
3077 	uint32_t reg;
3078 
3079 	rsu_write_1(sc, R92S_SPS0_CTRL + 1, 0x53);
3080 	rsu_write_1(sc, R92S_SPS0_CTRL + 0, 0x57);
3081 
3082 	/* Enable AFE macro block's bandgap and Mbias. */
3083 	rsu_write_1(sc, R92S_AFE_MISC,
3084 	    rsu_read_1(sc, R92S_AFE_MISC) |
3085 	    R92S_AFE_MISC_BGEN | R92S_AFE_MISC_MBEN);
3086 	/* Enable LDOA15 block. */
3087 	rsu_write_1(sc, R92S_LDOA15_CTRL,
3088 	    rsu_read_1(sc, R92S_LDOA15_CTRL) | R92S_LDA15_EN);
3089 
3090 	rsu_write_1(sc, R92S_SPS1_CTRL,
3091 	    rsu_read_1(sc, R92S_SPS1_CTRL) | R92S_SPS1_LDEN);
3092 	rsu_ms_delay(sc, 2000);
3093 	/* Enable switch regulator block. */
3094 	rsu_write_1(sc, R92S_SPS1_CTRL,
3095 	    rsu_read_1(sc, R92S_SPS1_CTRL) | R92S_SPS1_SWEN);
3096 
3097 	rsu_write_4(sc, R92S_SPS1_CTRL, 0x00a7b267);
3098 
3099 	rsu_write_1(sc, R92S_SYS_ISO_CTRL + 1,
3100 	    rsu_read_1(sc, R92S_SYS_ISO_CTRL + 1) | 0x08);
3101 
3102 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3103 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) | 0x20);
3104 
3105 	rsu_write_1(sc, R92S_SYS_ISO_CTRL + 1,
3106 	    rsu_read_1(sc, R92S_SYS_ISO_CTRL + 1) & ~0x90);
3107 
3108 	/* Enable AFE clock. */
3109 	rsu_write_1(sc, R92S_AFE_XTAL_CTRL + 1,
3110 	    rsu_read_1(sc, R92S_AFE_XTAL_CTRL + 1) & ~0x04);
3111 	/* Enable AFE PLL macro block. */
3112 	rsu_write_1(sc, R92S_AFE_PLL_CTRL,
3113 	    rsu_read_1(sc, R92S_AFE_PLL_CTRL) | 0x11);
3114 	/* Attach AFE PLL to MACTOP/BB. */
3115 	rsu_write_1(sc, R92S_SYS_ISO_CTRL,
3116 	    rsu_read_1(sc, R92S_SYS_ISO_CTRL) & ~0x11);
3117 
3118 	/* Switch to 40MHz clock instead of 80MHz. */
3119 	rsu_write_2(sc, R92S_SYS_CLKR,
3120 	    rsu_read_2(sc, R92S_SYS_CLKR) & ~R92S_SYS_CLKSEL);
3121 
3122 	/* Enable MAC clock. */
3123 	rsu_write_2(sc, R92S_SYS_CLKR,
3124 	    rsu_read_2(sc, R92S_SYS_CLKR) |
3125 	    R92S_MAC_CLK_EN | R92S_SYS_CLK_EN);
3126 
3127 	rsu_write_1(sc, R92S_PMC_FSM, 0x02);
3128 
3129 	/* Enable digital core and IOREG R/W. */
3130 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3131 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) | 0x08);
3132 
3133 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3134 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) | 0x80);
3135 
3136 	/* Switch the control path to firmware. */
3137 	reg = rsu_read_2(sc, R92S_SYS_CLKR);
3138 	reg = (reg & ~R92S_SWHW_SEL) | R92S_FWHW_SEL;
3139 	rsu_write_2(sc, R92S_SYS_CLKR, reg);
3140 
3141 	rsu_write_2(sc, R92S_CR, 0x37fc);
3142 
3143 	/* Fix USB RX FIFO issue. */
3144 	rsu_write_1(sc, 0xfe5c,
3145 	    rsu_read_1(sc, 0xfe5c) | 0x80);
3146 	rsu_write_1(sc, 0x00ab,
3147 	    rsu_read_1(sc, 0x00ab) | 0xc0);
3148 
3149 	rsu_write_1(sc, R92S_SYS_CLKR,
3150 	    rsu_read_1(sc, R92S_SYS_CLKR) & ~R92S_SYS_CPU_CLKSEL);
3151 }
3152 
3153 /*
3154  * Power on sequence for B-cut and C-cut adapters.
3155  */
3156 static void
3157 rsu_power_on_bcut(struct rsu_softc *sc)
3158 {
3159 	uint32_t reg;
3160 	int ntries;
3161 
3162 	/* Prevent eFuse leakage. */
3163 	rsu_write_1(sc, 0x37, 0xb0);
3164 	rsu_ms_delay(sc, 10);
3165 	rsu_write_1(sc, 0x37, 0x30);
3166 
3167 	/* Switch the control path to hardware. */
3168 	reg = rsu_read_2(sc, R92S_SYS_CLKR);
3169 	if (reg & R92S_FWHW_SEL) {
3170 		rsu_write_2(sc, R92S_SYS_CLKR,
3171 		    reg & ~(R92S_SWHW_SEL | R92S_FWHW_SEL));
3172 	}
3173 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3174 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) & ~0x8c);
3175 	rsu_ms_delay(sc, 1);
3176 
3177 	rsu_write_1(sc, R92S_SPS0_CTRL + 1, 0x53);
3178 	rsu_write_1(sc, R92S_SPS0_CTRL + 0, 0x57);
3179 
3180 	reg = rsu_read_1(sc, R92S_AFE_MISC);
3181 	rsu_write_1(sc, R92S_AFE_MISC, reg | R92S_AFE_MISC_BGEN);
3182 	rsu_write_1(sc, R92S_AFE_MISC, reg | R92S_AFE_MISC_BGEN |
3183 	    R92S_AFE_MISC_MBEN | R92S_AFE_MISC_I32_EN);
3184 
3185 	/* Enable PLL. */
3186 	rsu_write_1(sc, R92S_LDOA15_CTRL,
3187 	    rsu_read_1(sc, R92S_LDOA15_CTRL) | R92S_LDA15_EN);
3188 
3189 	rsu_write_1(sc, R92S_LDOV12D_CTRL,
3190 	    rsu_read_1(sc, R92S_LDOV12D_CTRL) | R92S_LDV12_EN);
3191 
3192 	rsu_write_1(sc, R92S_SYS_ISO_CTRL + 1,
3193 	    rsu_read_1(sc, R92S_SYS_ISO_CTRL + 1) | 0x08);
3194 
3195 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3196 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) | 0x20);
3197 
3198 	/* Support 64KB IMEM. */
3199 	rsu_write_1(sc, R92S_SYS_ISO_CTRL + 1,
3200 	    rsu_read_1(sc, R92S_SYS_ISO_CTRL + 1) & ~0x97);
3201 
3202 	/* Enable AFE clock. */
3203 	rsu_write_1(sc, R92S_AFE_XTAL_CTRL + 1,
3204 	    rsu_read_1(sc, R92S_AFE_XTAL_CTRL + 1) & ~0x04);
3205 	/* Enable AFE PLL macro block. */
3206 	reg = rsu_read_1(sc, R92S_AFE_PLL_CTRL);
3207 	rsu_write_1(sc, R92S_AFE_PLL_CTRL, reg | 0x11);
3208 	rsu_ms_delay(sc, 1);
3209 	rsu_write_1(sc, R92S_AFE_PLL_CTRL, reg | 0x51);
3210 	rsu_ms_delay(sc, 1);
3211 	rsu_write_1(sc, R92S_AFE_PLL_CTRL, reg | 0x11);
3212 	rsu_ms_delay(sc, 1);
3213 
3214 	/* Attach AFE PLL to MACTOP/BB. */
3215 	rsu_write_1(sc, R92S_SYS_ISO_CTRL,
3216 	    rsu_read_1(sc, R92S_SYS_ISO_CTRL) & ~0x11);
3217 
3218 	/* Switch to 40MHz clock. */
3219 	rsu_write_1(sc, R92S_SYS_CLKR, 0x00);
3220 	/* Disable CPU clock and 80MHz SSC. */
3221 	rsu_write_1(sc, R92S_SYS_CLKR,
3222 	    rsu_read_1(sc, R92S_SYS_CLKR) | 0xa0);
3223 	/* Enable MAC clock. */
3224 	rsu_write_2(sc, R92S_SYS_CLKR,
3225 	    rsu_read_2(sc, R92S_SYS_CLKR) |
3226 	    R92S_MAC_CLK_EN | R92S_SYS_CLK_EN);
3227 
3228 	rsu_write_1(sc, R92S_PMC_FSM, 0x02);
3229 
3230 	/* Enable digital core and IOREG R/W. */
3231 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3232 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) | 0x08);
3233 
3234 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1,
3235 	    rsu_read_1(sc, R92S_SYS_FUNC_EN + 1) | 0x80);
3236 
3237 	/* Switch the control path to firmware. */
3238 	reg = rsu_read_2(sc, R92S_SYS_CLKR);
3239 	reg = (reg & ~R92S_SWHW_SEL) | R92S_FWHW_SEL;
3240 	rsu_write_2(sc, R92S_SYS_CLKR, reg);
3241 
3242 	rsu_write_2(sc, R92S_CR, 0x37fc);
3243 
3244 	/* Fix USB RX FIFO issue. */
3245 	rsu_write_1(sc, 0xfe5c,
3246 	    rsu_read_1(sc, 0xfe5c) | 0x80);
3247 
3248 	rsu_write_1(sc, R92S_SYS_CLKR,
3249 	    rsu_read_1(sc, R92S_SYS_CLKR) & ~R92S_SYS_CPU_CLKSEL);
3250 
3251 	rsu_write_1(sc, 0xfe1c, 0x80);
3252 
3253 	/* Make sure TxDMA is ready to download firmware. */
3254 	for (ntries = 0; ntries < 20; ntries++) {
3255 		reg = rsu_read_1(sc, R92S_TCR);
3256 		if ((reg & (R92S_TCR_IMEM_CHK_RPT | R92S_TCR_EMEM_CHK_RPT)) ==
3257 		    (R92S_TCR_IMEM_CHK_RPT | R92S_TCR_EMEM_CHK_RPT))
3258 			break;
3259 		rsu_ms_delay(sc, 1);
3260 	}
3261 	if (ntries == 20) {
3262 		RSU_DPRINTF(sc, RSU_DEBUG_RESET | RSU_DEBUG_TX,
3263 		    "%s: TxDMA is not ready\n",
3264 		    __func__);
3265 		/* Reset TxDMA. */
3266 		reg = rsu_read_1(sc, R92S_CR);
3267 		rsu_write_1(sc, R92S_CR, reg & ~R92S_CR_TXDMA_EN);
3268 		rsu_ms_delay(sc, 1);
3269 		rsu_write_1(sc, R92S_CR, reg | R92S_CR_TXDMA_EN);
3270 	}
3271 }
3272 
3273 static void
3274 rsu_power_off(struct rsu_softc *sc)
3275 {
3276 	/* Turn RF off. */
3277 	rsu_write_1(sc, R92S_RF_CTRL, 0x00);
3278 	rsu_ms_delay(sc, 5);
3279 
3280 	/* Turn MAC off. */
3281 	/* Switch control path. */
3282 	rsu_write_1(sc, R92S_SYS_CLKR + 1, 0x38);
3283 	/* Reset MACTOP. */
3284 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1, 0x70);
3285 	rsu_write_1(sc, R92S_PMC_FSM, 0x06);
3286 	rsu_write_1(sc, R92S_SYS_ISO_CTRL + 0, 0xf9);
3287 	rsu_write_1(sc, R92S_SYS_ISO_CTRL + 1, 0xe8);
3288 
3289 	/* Disable AFE PLL. */
3290 	rsu_write_1(sc, R92S_AFE_PLL_CTRL, 0x00);
3291 	/* Disable A15V. */
3292 	rsu_write_1(sc, R92S_LDOA15_CTRL, 0x54);
3293 	/* Disable eFuse 1.2V. */
3294 	rsu_write_1(sc, R92S_SYS_FUNC_EN + 1, 0x50);
3295 	rsu_write_1(sc, R92S_LDOV12D_CTRL, 0x24);
3296 	/* Enable AFE macro block's bandgap and Mbias. */
3297 	rsu_write_1(sc, R92S_AFE_MISC, 0x30);
3298 	/* Disable 1.6V LDO. */
3299 	rsu_write_1(sc, R92S_SPS0_CTRL + 0, 0x56);
3300 	rsu_write_1(sc, R92S_SPS0_CTRL + 1, 0x43);
3301 
3302 	/* Firmware - tell it to switch things off */
3303 	(void) rsu_set_fw_power_state(sc, RSU_PWR_OFF);
3304 }
3305 
3306 static int
3307 rsu_fw_loadsection(struct rsu_softc *sc, const uint8_t *buf, int len)
3308 {
3309 	const uint8_t which = rsu_wme_ac_xfer_map[WME_AC_VO];
3310 	struct rsu_data *data;
3311 	struct r92s_tx_desc *txd;
3312 	int mlen;
3313 
3314 	while (len > 0) {
3315 		data = rsu_getbuf(sc);
3316 		if (data == NULL)
3317 			return (ENOMEM);
3318 		txd = (struct r92s_tx_desc *)data->buf;
3319 		memset(txd, 0, sizeof(*txd));
3320 		if (len <= RSU_TXBUFSZ - sizeof(*txd)) {
3321 			/* Last chunk. */
3322 			txd->txdw0 |= htole32(R92S_TXDW0_LINIP);
3323 			mlen = len;
3324 		} else
3325 			mlen = RSU_TXBUFSZ - sizeof(*txd);
3326 		txd->txdw0 |= htole32(SM(R92S_TXDW0_PKTLEN, mlen));
3327 		memcpy(&txd[1], buf, mlen);
3328 		data->buflen = sizeof(*txd) + mlen;
3329 		RSU_DPRINTF(sc, RSU_DEBUG_TX | RSU_DEBUG_FW | RSU_DEBUG_RESET,
3330 		    "%s: starting transfer %p\n",
3331 		    __func__, data);
3332 		STAILQ_INSERT_TAIL(&sc->sc_tx_pending[which], data, next);
3333 		buf += mlen;
3334 		len -= mlen;
3335 	}
3336 	usbd_transfer_start(sc->sc_xfer[which]);
3337 	return (0);
3338 }
3339 
3340 CTASSERT(sizeof(size_t) >= sizeof(uint32_t));
3341 
3342 static int
3343 rsu_load_firmware(struct rsu_softc *sc)
3344 {
3345 	const struct r92s_fw_hdr *hdr;
3346 	struct r92s_fw_priv dmem;
3347 	struct ieee80211com *ic = &sc->sc_ic;
3348 	const uint8_t *imem, *emem;
3349 	uint32_t imemsz, ememsz;
3350 	const struct firmware *fw;
3351 	size_t size;
3352 	uint32_t reg;
3353 	int ntries, error;
3354 
3355 	if (rsu_read_1(sc, R92S_TCR) & R92S_TCR_FWRDY) {
3356 		RSU_DPRINTF(sc, RSU_DEBUG_ANY,
3357 		    "%s: Firmware already loaded\n",
3358 		    __func__);
3359 		return (0);
3360 	}
3361 
3362 	RSU_UNLOCK(sc);
3363 	/* Read firmware image from the filesystem. */
3364 	if ((fw = firmware_get("rsu-rtl8712fw")) == NULL) {
3365 		device_printf(sc->sc_dev,
3366 		    "%s: failed load firmware of file rsu-rtl8712fw\n",
3367 		    __func__);
3368 		RSU_LOCK(sc);
3369 		return (ENXIO);
3370 	}
3371 	RSU_LOCK(sc);
3372 	size = fw->datasize;
3373 	if (size < sizeof(*hdr)) {
3374 		device_printf(sc->sc_dev, "firmware too short\n");
3375 		error = EINVAL;
3376 		goto fail;
3377 	}
3378 	hdr = (const struct r92s_fw_hdr *)fw->data;
3379 	if (hdr->signature != htole16(0x8712) &&
3380 	    hdr->signature != htole16(0x8192)) {
3381 		device_printf(sc->sc_dev,
3382 		    "invalid firmware signature 0x%x\n",
3383 		    le16toh(hdr->signature));
3384 		error = EINVAL;
3385 		goto fail;
3386 	}
3387 	RSU_DPRINTF(sc, RSU_DEBUG_FW, "FW V%d %02x-%02x %02x:%02x\n",
3388 	    le16toh(hdr->version), hdr->month, hdr->day, hdr->hour,
3389 	    hdr->minute);
3390 
3391 	/* Make sure that driver and firmware are in sync. */
3392 	if (hdr->privsz != htole32(sizeof(dmem))) {
3393 		device_printf(sc->sc_dev, "unsupported firmware image\n");
3394 		error = EINVAL;
3395 		goto fail;
3396 	}
3397 	/* Get FW sections sizes. */
3398 	imemsz = le32toh(hdr->imemsz);
3399 	ememsz = le32toh(hdr->sramsz);
3400 	/* Check that all FW sections fit in image. */
3401 	if (imemsz > (size_t)(size - sizeof(*hdr)) ||
3402 	    ememsz > (size_t)(size - sizeof(*hdr) - imemsz)) {
3403 		device_printf(sc->sc_dev, "firmware too short\n");
3404 		error = EINVAL;
3405 		goto fail;
3406 	}
3407 	imem = (const uint8_t *)&hdr[1];
3408 	emem = imem + imemsz;
3409 
3410 	/* Load IMEM section. */
3411 	error = rsu_fw_loadsection(sc, imem, imemsz);
3412 	if (error != 0) {
3413 		device_printf(sc->sc_dev,
3414 		    "could not load firmware section %s\n", "IMEM");
3415 		goto fail;
3416 	}
3417 	/* Wait for load to complete. */
3418 	for (ntries = 0; ntries != 50; ntries++) {
3419 		rsu_ms_delay(sc, 10);
3420 		reg = rsu_read_1(sc, R92S_TCR);
3421 		if (reg & R92S_TCR_IMEM_CODE_DONE)
3422 			break;
3423 	}
3424 	if (ntries == 50) {
3425 		device_printf(sc->sc_dev, "timeout waiting for IMEM transfer\n");
3426 		error = ETIMEDOUT;
3427 		goto fail;
3428 	}
3429 	/* Load EMEM section. */
3430 	error = rsu_fw_loadsection(sc, emem, ememsz);
3431 	if (error != 0) {
3432 		device_printf(sc->sc_dev,
3433 		    "could not load firmware section %s\n", "EMEM");
3434 		goto fail;
3435 	}
3436 	/* Wait for load to complete. */
3437 	for (ntries = 0; ntries != 50; ntries++) {
3438 		rsu_ms_delay(sc, 10);
3439 		reg = rsu_read_2(sc, R92S_TCR);
3440 		if (reg & R92S_TCR_EMEM_CODE_DONE)
3441 			break;
3442 	}
3443 	if (ntries == 50) {
3444 		device_printf(sc->sc_dev, "timeout waiting for EMEM transfer\n");
3445 		error = ETIMEDOUT;
3446 		goto fail;
3447 	}
3448 	/* Enable CPU. */
3449 	rsu_write_1(sc, R92S_SYS_CLKR,
3450 	    rsu_read_1(sc, R92S_SYS_CLKR) | R92S_SYS_CPU_CLKSEL);
3451 	if (!(rsu_read_1(sc, R92S_SYS_CLKR) & R92S_SYS_CPU_CLKSEL)) {
3452 		device_printf(sc->sc_dev, "could not enable system clock\n");
3453 		error = EIO;
3454 		goto fail;
3455 	}
3456 	rsu_write_2(sc, R92S_SYS_FUNC_EN,
3457 	    rsu_read_2(sc, R92S_SYS_FUNC_EN) | R92S_FEN_CPUEN);
3458 	if (!(rsu_read_2(sc, R92S_SYS_FUNC_EN) & R92S_FEN_CPUEN)) {
3459 		device_printf(sc->sc_dev,
3460 		    "could not enable microcontroller\n");
3461 		error = EIO;
3462 		goto fail;
3463 	}
3464 	/* Wait for CPU to initialize. */
3465 	for (ntries = 0; ntries < 100; ntries++) {
3466 		if (rsu_read_1(sc, R92S_TCR) & R92S_TCR_IMEM_RDY)
3467 			break;
3468 		rsu_ms_delay(sc, 1);
3469 	}
3470 	if (ntries == 100) {
3471 		device_printf(sc->sc_dev,
3472 		    "timeout waiting for microcontroller\n");
3473 		error = ETIMEDOUT;
3474 		goto fail;
3475 	}
3476 
3477 	/* Update DMEM section before loading. */
3478 	memset(&dmem, 0, sizeof(dmem));
3479 	dmem.hci_sel = R92S_HCI_SEL_USB | R92S_HCI_SEL_8172;
3480 	dmem.nendpoints = sc->sc_nendpoints;
3481 	dmem.chip_version = sc->cut;
3482 	dmem.rf_config = sc->sc_rftype;
3483 	dmem.vcs_type = R92S_VCS_TYPE_AUTO;
3484 	dmem.vcs_mode = R92S_VCS_MODE_RTS_CTS;
3485 	dmem.turbo_mode = 0;
3486 	dmem.bw40_en = !! (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40);
3487 	dmem.amsdu2ampdu_en = !! (sc->sc_ht);
3488 	dmem.ampdu_en = !! (sc->sc_ht);
3489 	dmem.agg_offload = !! (sc->sc_ht);
3490 	dmem.qos_en = 1;
3491 	dmem.ps_offload = 1;
3492 	dmem.lowpower_mode = 1;	/* XXX TODO: configurable? */
3493 	/* Load DMEM section. */
3494 	error = rsu_fw_loadsection(sc, (uint8_t *)&dmem, sizeof(dmem));
3495 	if (error != 0) {
3496 		device_printf(sc->sc_dev,
3497 		    "could not load firmware section %s\n", "DMEM");
3498 		goto fail;
3499 	}
3500 	/* Wait for load to complete. */
3501 	for (ntries = 0; ntries < 100; ntries++) {
3502 		if (rsu_read_1(sc, R92S_TCR) & R92S_TCR_DMEM_CODE_DONE)
3503 			break;
3504 		rsu_ms_delay(sc, 1);
3505 	}
3506 	if (ntries == 100) {
3507 		device_printf(sc->sc_dev, "timeout waiting for %s transfer\n",
3508 		    "DMEM");
3509 		error = ETIMEDOUT;
3510 		goto fail;
3511 	}
3512 	/* Wait for firmware readiness. */
3513 	for (ntries = 0; ntries < 60; ntries++) {
3514 		if (!(rsu_read_1(sc, R92S_TCR) & R92S_TCR_FWRDY))
3515 			break;
3516 		rsu_ms_delay(sc, 1);
3517 	}
3518 	if (ntries == 60) {
3519 		device_printf(sc->sc_dev,
3520 		    "timeout waiting for firmware readiness\n");
3521 		error = ETIMEDOUT;
3522 		goto fail;
3523 	}
3524  fail:
3525 	firmware_put(fw, FIRMWARE_UNLOAD);
3526 	return (error);
3527 }
3528 
3529 static int
3530 rsu_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
3531     const struct ieee80211_bpf_params *params)
3532 {
3533 	struct ieee80211com *ic = ni->ni_ic;
3534 	struct rsu_softc *sc = ic->ic_softc;
3535 	struct rsu_data *bf;
3536 
3537 	/* prevent management frames from being sent if we're not ready */
3538 	if (!sc->sc_running) {
3539 		m_freem(m);
3540 		return (ENETDOWN);
3541 	}
3542 	RSU_LOCK(sc);
3543 	bf = rsu_getbuf(sc);
3544 	if (bf == NULL) {
3545 		m_freem(m);
3546 		RSU_UNLOCK(sc);
3547 		return (ENOBUFS);
3548 	}
3549 	if (rsu_tx_start(sc, ni, m, bf) != 0) {
3550 		m_freem(m);
3551 		rsu_freebuf(sc, bf);
3552 		RSU_UNLOCK(sc);
3553 		return (EIO);
3554 	}
3555 	RSU_UNLOCK(sc);
3556 
3557 	return (0);
3558 }
3559 
3560 static void
3561 rsu_rxfilter_init(struct rsu_softc *sc)
3562 {
3563 	uint32_t reg;
3564 
3565 	RSU_ASSERT_LOCKED(sc);
3566 
3567 	/* Setup multicast filter. */
3568 	rsu_set_multi(sc);
3569 
3570 	/* Adjust Rx filter. */
3571 	reg = rsu_read_4(sc, R92S_RCR);
3572 	reg &= ~R92S_RCR_AICV;
3573 	reg |= R92S_RCR_APP_PHYSTS;
3574 	if (sc->sc_rx_checksum_enable)
3575 		reg |= R92S_RCR_TCP_OFFLD_EN;
3576 	rsu_write_4(sc, R92S_RCR, reg);
3577 
3578 	/* Update dynamic Rx filter parts. */
3579 	rsu_rxfilter_refresh(sc);
3580 }
3581 
3582 static void
3583 rsu_rxfilter_set(struct rsu_softc *sc, uint32_t clear, uint32_t set)
3584 {
3585 	/* NB: firmware can touch this register too. */
3586 	rsu_write_4(sc, R92S_RCR,
3587 	   (rsu_read_4(sc, R92S_RCR) & ~clear) | set);
3588 }
3589 
3590 static void
3591 rsu_rxfilter_refresh(struct rsu_softc *sc)
3592 {
3593 	struct ieee80211com *ic = &sc->sc_ic;
3594 	uint32_t mask_all, mask_min;
3595 
3596 	RSU_ASSERT_LOCKED(sc);
3597 
3598 	/* NB: RCR_AMF / RXFLTMAP_MGT are used by firmware. */
3599 	mask_all = R92S_RCR_ACF | R92S_RCR_AAP;
3600 	mask_min = R92S_RCR_APM;
3601 	if (sc->sc_vap_is_running)
3602 		mask_min |= R92S_RCR_CBSSID;
3603 	else
3604 		mask_all |= R92S_RCR_ADF;
3605 
3606 	if (ic->ic_opmode == IEEE80211_M_MONITOR) {
3607 		uint16_t rxfltmap;
3608 		if (sc->sc_vap_is_running)
3609 			rxfltmap = 0;
3610 		else
3611 			rxfltmap = R92S_RXFLTMAP_MGT_DEF;
3612 		rsu_write_2(sc, R92S_RXFLTMAP_MGT, rxfltmap);
3613 	}
3614 
3615 	if (ic->ic_promisc == 0 && ic->ic_opmode != IEEE80211_M_MONITOR)
3616 		rsu_rxfilter_set(sc, mask_all, mask_min);
3617 	else
3618 		rsu_rxfilter_set(sc, mask_min, mask_all);
3619 }
3620 
3621 static int
3622 rsu_init(struct rsu_softc *sc)
3623 {
3624 	struct ieee80211com *ic = &sc->sc_ic;
3625 	struct ieee80211vap *vap = TAILQ_FIRST(&ic->ic_vaps);
3626 	uint8_t macaddr[IEEE80211_ADDR_LEN];
3627 	int error;
3628 	int i;
3629 
3630 	RSU_LOCK(sc);
3631 
3632 	if (sc->sc_running) {
3633 		RSU_UNLOCK(sc);
3634 		return (0);
3635 	}
3636 
3637 	/* Ensure the mbuf queue is drained */
3638 	rsu_drain_mbufq(sc);
3639 
3640 	/* Reset power management state. */
3641 	rsu_write_1(sc, R92S_USB_HRPWM, 0);
3642 
3643 	/* Power on adapter. */
3644 	if (sc->cut == 1)
3645 		rsu_power_on_acut(sc);
3646 	else
3647 		rsu_power_on_bcut(sc);
3648 
3649 	/* Load firmware. */
3650 	error = rsu_load_firmware(sc);
3651 	if (error != 0)
3652 		goto fail;
3653 
3654 	rsu_write_4(sc, R92S_CR,
3655 	    rsu_read_4(sc, R92S_CR) & ~0xff000000);
3656 
3657 	/* Use 128 bytes pages. */
3658 	rsu_write_1(sc, 0x00b5,
3659 	    rsu_read_1(sc, 0x00b5) | 0x01);
3660 	/* Enable USB Rx aggregation. */
3661 	rsu_write_1(sc, 0x00bd,
3662 	    rsu_read_1(sc, 0x00bd) | 0x80);
3663 	/* Set USB Rx aggregation threshold. */
3664 	rsu_write_1(sc, 0x00d9, 0x01);
3665 	/* Set USB Rx aggregation timeout (1.7ms/4). */
3666 	rsu_write_1(sc, 0xfe5b, 0x04);
3667 	/* Fix USB Rx FIFO issue. */
3668 	rsu_write_1(sc, 0xfe5c,
3669 	    rsu_read_1(sc, 0xfe5c) | 0x80);
3670 
3671 	/* Set MAC address. */
3672 	IEEE80211_ADDR_COPY(macaddr, vap ? vap->iv_myaddr : ic->ic_macaddr);
3673 	rsu_write_region_1(sc, R92S_MACID, macaddr, IEEE80211_ADDR_LEN);
3674 
3675 	/* It really takes 1.5 seconds for the firmware to boot: */
3676 	usb_pause_mtx(&sc->sc_mtx, USB_MS_TO_TICKS(2000));
3677 
3678 	RSU_DPRINTF(sc, RSU_DEBUG_RESET, "%s: setting MAC address to %s\n",
3679 	    __func__,
3680 	    ether_sprintf(macaddr));
3681 	error = rsu_fw_cmd(sc, R92S_CMD_SET_MAC_ADDRESS, macaddr,
3682 	    IEEE80211_ADDR_LEN);
3683 	if (error != 0) {
3684 		device_printf(sc->sc_dev, "could not set MAC address\n");
3685 		goto fail;
3686 	}
3687 
3688 	/* Initialize Rx filter. */
3689 	rsu_rxfilter_init(sc);
3690 
3691 	/* Set PS mode fully active */
3692 	error = rsu_set_fw_power_state(sc, RSU_PWR_ACTIVE);
3693 	if (error != 0) {
3694 		device_printf(sc->sc_dev, "could not set PS mode\n");
3695 		goto fail;
3696 	}
3697 
3698 	/* Install static keys (if any). */
3699 	error = rsu_reinit_static_keys(sc);
3700 	if (error != 0)
3701 		goto fail;
3702 
3703 	sc->sc_extra_scan = 0;
3704 	usbd_transfer_start(sc->sc_xfer[RSU_BULK_RX]);
3705 
3706 	/* We're ready to go. */
3707 	sc->sc_running = 1;
3708 	RSU_UNLOCK(sc);
3709 
3710 	return (0);
3711 fail:
3712 	/* Need to stop all failed transfers, if any */
3713 	for (i = 0; i != RSU_N_TRANSFER; i++)
3714 		usbd_transfer_stop(sc->sc_xfer[i]);
3715 	RSU_UNLOCK(sc);
3716 
3717 	return (error);
3718 }
3719 
3720 static void
3721 rsu_stop(struct rsu_softc *sc)
3722 {
3723 	int i;
3724 
3725 	RSU_LOCK(sc);
3726 	if (!sc->sc_running) {
3727 		RSU_UNLOCK(sc);
3728 		return;
3729 	}
3730 
3731 	sc->sc_running = 0;
3732 	sc->sc_vap_is_running = 0;
3733 	sc->sc_calibrating = 0;
3734 	taskqueue_cancel_timeout(taskqueue_thread, &sc->calib_task, NULL);
3735 	taskqueue_cancel(taskqueue_thread, &sc->tx_task, NULL);
3736 
3737 	/* Power off adapter. */
3738 	rsu_power_off(sc);
3739 
3740 	/*
3741 	 * CAM is not accessible after shutdown;
3742 	 * all entries are marked (by firmware?) as invalid.
3743 	 */
3744 	memset(sc->free_keys_bmap, 0, sizeof(sc->free_keys_bmap));
3745 	memset(sc->keys_bmap, 0, sizeof(sc->keys_bmap));
3746 
3747 	for (i = 0; i < RSU_N_TRANSFER; i++)
3748 		usbd_transfer_stop(sc->sc_xfer[i]);
3749 
3750 	/* Ensure the mbuf queue is drained */
3751 	rsu_drain_mbufq(sc);
3752 	RSU_UNLOCK(sc);
3753 }
3754 
3755 /*
3756  * Note: usb_pause_mtx() actually releases the mutex before calling pause(),
3757  * which breaks any kind of driver serialisation.
3758  */
3759 static void
3760 rsu_ms_delay(struct rsu_softc *sc, int ms)
3761 {
3762 
3763 	//usb_pause_mtx(&sc->sc_mtx, hz / 1000);
3764 	DELAY(ms * 1000);
3765 }
3766