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wireg.h revision 1.1
      1 /*	$NetBSD: wireg.h,v 1.1 2001/05/06 03:26:39 ichiro Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997, 1998, 1999
      5  *	Bill Paul <wpaul (at) ctr.columbia.edu>.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by Bill Paul.
     18  * 4. Neither the name of the author nor the names of any co-contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
     26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     32  * THE POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 /*
     36  * FreeBSD driver ported to NetBSD by Bill Sommerfeld in the back of the
     37  * Oslo IETF plenary meeting.
     38  */
     39 
     40 #define WI_TIMEOUT	65536
     41 
     42 #define WI_PORT0	0
     43 #define WI_PORT1	1
     44 #define WI_PORT2	2
     45 #define WI_PORT3	3
     46 #define WI_PORT4	4
     47 #define WI_PORT5	5
     48 
     49 /* Default port: 0 (only 0 exists on stations) */
     50 #define WI_DEFAULT_PORT	(WI_PORT0 << 8)
     51 
     52 /* Default TX rate: 2Mbps, auto fallback */
     53 #define WI_DEFAULT_TX_RATE	3
     54 
     55 /* Default network name: ANY */
     56 /*
     57  * [sommerfeld 1999/07/15] Changed from "ANY" to ""; according to Bill Fenner,
     58  * ANY is used in MS driver user interfaces, while "" is used over the
     59  * wire..
     60  */
     61 #define WI_DEFAULT_NETNAME	""
     62 
     63 #define WI_DEFAULT_AP_DENSITY	1
     64 
     65 #define WI_DEFAULT_RTS_THRESH	2347
     66 
     67 #define WI_DEFAULT_DATALEN	2304
     68 
     69 #define WI_DEFAULT_CREATE_IBSS	0
     70 
     71 #define WI_DEFAULT_PM_ENABLED	0
     72 
     73 #define WI_DEFAULT_MAX_SLEEP	100
     74 
     75 #ifdef __NetBSD__
     76 #define OS_STRING_NAME	"NetBSD"
     77 #endif
     78 #ifdef __FreeBSD__
     79 #define OS_STRING_NAME	"FreeBSD"
     80 #endif
     81 #ifdef __OpenBSD__
     82 #define OS_STRING_NAME	"OpenBSD"
     83 #endif
     84 
     85 #define WI_DEFAULT_NODENAME	OS_STRING_NAME " WaveLAN/IEEE node"
     86 
     87 #define WI_DEFAULT_IBSS		OS_STRING_NAME " IBSS"
     88 
     89 #define WI_DEFAULT_CHAN		3
     90 
     91 /*
     92  * register space access macros
     93  */
     94 #define CSR_WRITE_4(sc, reg, val)	\
     95 	bus_space_write_4(sc->sc_iot, sc->sc_ioh, reg, val)
     96 #define CSR_WRITE_2(sc, reg, val)	\
     97 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, reg, val)
     98 #define CSR_WRITE_1(sc, reg, val)	\
     99 	bus_space_write_1(sc->sc_iot, sc->sc_ioh, reg, val)
    100 
    101 #define CSR_READ_4(sc, reg)		\
    102 	bus_space_read_4(sc->sc_iot, sc->sc_ioh, reg)
    103 #define CSR_READ_2(sc, reg)		\
    104 	bus_space_read_2(sc->sc_iot, sc->sc_ioh, reg)
    105 #define CSR_READ_1(sc, reg)		\
    106 	bus_space_read_1(sc->sc_iot, sc->sc_ioh, reg)
    107 
    108 /*
    109  * The WaveLAN/IEEE cards contain an 802.11 MAC controller which Lucent
    110  * calls 'Hermes.' In typical fashion, getting documentation about this
    111  * controller is about as easy as squeezing blood from a stone. Here
    112  * is more or less what I know:
    113  *
    114  * - The Hermes controller is firmware driven, and the host interacts
    115  *   with the Hermes via a firmware interface, which can change.
    116  *
    117  * - The Hermes is described in a document called: "Hermes Firmware
    118  *   WaveLAN/IEEE Station Functions," document #010245, which of course
    119  *   Lucent will not release without an NDA.
    120  *
    121  * - Lucent has created a library called HCF (Hardware Control Functions)
    122  *   though which it wants developers to interact with the card. The HCF
    123  *   is needlessly complex, ill conceived and badly documented. Actually,
    124  *   the comments in the HCP code itself aren't bad, but the publically
    125  *   available manual that comes with it is awful, probably due largely to
    126  *   the fact that it has been emasculated in order to hide information
    127  *   that Lucent wants to keep proprietary. The purpose of the HCF seems
    128  *   to be to insulate the driver programmer from the Hermes itself so that
    129  *   Lucent has an excuse not to release programming in for it.
    130  *
    131  * - Lucent only makes available documentation and code for 'HCF Light'
    132  *   which is a stripped down version of HCF with certain features not
    133  *   implemented, most notably support for 802.11 frames.
    134  *
    135  * - The HCF code which I have seen blows goats. Whoever decided to
    136  *   use a 132 column format should be shot.
    137  *
    138  * Rather than actually use the Lucent HCF library, I have stripped all
    139  * the useful information from it and used it to create a driver in the
    140  * usual BSD form. Note: I don't want to hear anybody whining about the
    141  * fact that the Lucent code is GPLed and mine isn't. I did not actually
    142  * put any of Lucent's code in this driver: I only used it as a reference
    143  * to obtain information about the underlying hardware. The Hermes
    144  * programming interface is not GPLed, so bite me.
    145  */
    146 
    147 /*
    148  * Size of Hermes I/O space.
    149  */
    150 #define WI_IOSIZE		0x40
    151 
    152 /*
    153  * Hermes register definitions and what little I know about them.
    154  */
    155 
    156 /* Hermes command/status registers. */
    157 #define WI_COMMAND		0x00
    158 #define WI_PARAM0		0x02
    159 #define WI_PARAM1		0x04
    160 #define WI_PARAM2		0x06
    161 #define WI_STATUS		0x08
    162 #define WI_RESP0		0x0A
    163 #define WI_RESP1		0x0C
    164 #define WI_RESP2		0x0E
    165 
    166 /* Command register values. */
    167 #define WI_CMD_BUSY		0x8000 /* busy bit */
    168 #define WI_CMD_INI		0x0000 /* initialize */
    169 #define WI_CMD_ENABLE		0x0001 /* enable */
    170 #define WI_CMD_DISABLE		0x0002 /* disable */
    171 #define WI_CMD_DIAG		0x0003
    172 #define WI_CMD_ALLOC_MEM	0x000A /* allocate NIC memory */
    173 #define WI_CMD_TX		0x000B /* transmit */
    174 #define WI_CMD_NOTIFY		0x0010
    175 #define WI_CMD_INQUIRE		0x0011
    176 #define WI_CMD_ACCESS		0x0021
    177 #define WI_CMD_PROGRAM		0x0022
    178 
    179 #define WI_CMD_CODE_MASK	0x003F
    180 
    181 /*
    182  * Reclaim qualifier bit, applicable to the
    183  * TX and INQUIRE commands.
    184  */
    185 #define WI_RECLAIM		0x0100 /* reclaim NIC memory */
    186 
    187 /*
    188  * ACCESS command qualifier bits.
    189  */
    190 #define WI_ACCESS_READ		0x0000
    191 #define WI_ACCESS_WRITE		0x0100
    192 
    193 /*
    194  * PROGRAM command qualifier bits.
    195  */
    196 #define WI_PROGRAM_DISABLE	0x0000
    197 #define WI_PROGRAM_ENABLE_RAM	0x0100
    198 #define WI_PROGRAM_ENABLE_NVRAM	0x0200
    199 #define WI_PROGRAM_NVRAM	0x0300
    200 
    201 /* Status register values */
    202 #define WI_STAT_CMD_CODE	0x003F
    203 #define WI_STAT_DIAG_ERR	0x0100
    204 #define WI_STAT_INQ_ERR		0x0500
    205 #define WI_STAT_CMD_RESULT	0x7F00
    206 
    207 /* memory handle management registers */
    208 #define WI_INFO_FID		0x10
    209 #define WI_RX_FID		0x20
    210 #define WI_ALLOC_FID		0x22
    211 #define WI_TX_CMP_FID		0x24
    212 
    213 /*
    214  * Buffer Access Path (BAP) registers.
    215  * These are I/O channels. I believe you can use each one for
    216  * any desired purpose independently of the other. In general
    217  * though, we use BAP1 for reading and writing LTV records and
    218  * reading received data frames, and BAP0 for writing transmit
    219  * frames. This is a convention though, not a rule.
    220  */
    221 #define WI_SEL0			0x18
    222 #define WI_SEL1			0x1A
    223 #define WI_OFF0			0x1C
    224 #define WI_OFF1			0x1E
    225 #define WI_DATA0		0x36
    226 #define WI_DATA1		0x38
    227 #define WI_BAP0			WI_DATA0
    228 #define WI_BAP1			WI_DATA1
    229 
    230 #define WI_OFF_BUSY		0x8000
    231 #define WI_OFF_ERR		0x4000
    232 #define WI_OFF_DATAOFF		0x0FFF
    233 
    234 /* Event registers */
    235 #define WI_EVENT_STAT		0x30	/* Event status */
    236 #define WI_INT_EN		0x32	/* Interrupt enable/disable */
    237 #define WI_EVENT_ACK		0x34	/* Ack event */
    238 
    239 /* Events */
    240 #define WI_EV_TICK		0x8000	/* aux timer tick */
    241 #define WI_EV_RES		0x4000	/* controller h/w error (time out) */
    242 #define WI_EV_INFO_DROP		0x2000	/* no RAM to build unsolicited frame */
    243 #define WI_EV_NO_CARD		0x0800	/* card removed (hunh?) */
    244 #define WI_EV_DUIF_RX		0x0400	/* wavelan management packet received */
    245 #define WI_EV_INFO		0x0080	/* async info frame */
    246 #define WI_EV_CMD		0x0010	/* command completed */
    247 #define WI_EV_ALLOC		0x0008	/* async alloc/reclaim completed */
    248 #define WI_EV_TX_EXC		0x0004	/* async xmit completed with failure */
    249 #define WI_EV_TX		0x0002	/* async xmit completed succesfully */
    250 #define WI_EV_RX		0x0001	/* async rx completed */
    251 
    252 #define WI_INTRS	\
    253 	(WI_EV_RX|WI_EV_TX|WI_EV_TX_EXC|WI_EV_ALLOC|WI_EV_INFO|WI_EV_INFO_DROP)
    254 
    255 /* Host software registers */
    256 #define WI_SW0			0x28
    257 #define WI_SW1			0x2A
    258 #define WI_SW2			0x2C
    259 #define WI_SW3			0x2E
    260 
    261 #define WI_CNTL			0x14
    262 
    263 #define WI_CNTL_AUX_ENA		0xC000
    264 #define WI_CNTL_AUX_ENA_STAT	0xC000
    265 #define WI_CNTL_AUX_DIS_STAT	0x0000
    266 #define WI_CNTL_AUX_ENA_CNTL	0x8000
    267 #define WI_CNTL_AUX_DIS_CNTL	0x4000
    268 
    269 #define WI_AUX_PAGE		0x3A
    270 #define WI_AUX_OFFSET		0x3C
    271 #define WI_AUX_DATA		0x3E
    272 
    273 /*
    274  * One form of communication with the Hermes is with what Lucent calls
    275  * LTV records, where LTV stands for Length, Type and Value. The length
    276  * and type are 16 bits and are in native byte order. The value is in
    277  * multiples of 16 bits and is in little endian byte order.
    278  */
    279 struct wi_ltv_gen {
    280 	u_int16_t		wi_len;
    281 	u_int16_t		wi_type;
    282 	u_int16_t		wi_val;
    283 };
    284 
    285 struct wi_ltv_str {
    286 	u_int16_t		wi_len;
    287 	u_int16_t		wi_type;
    288 	u_int16_t		wi_str[17];
    289 };
    290 
    291 #define WI_SETVAL(recno, val)			\
    292 	do {					\
    293 		struct wi_ltv_gen	g;	\
    294 						\
    295 		g.wi_len = 2;			\
    296 		g.wi_type = recno;		\
    297 		g.wi_val = val;			\
    298 		wi_write_record(sc, &g);	\
    299 	} while (0)
    300 
    301 #define WI_SETSTR(recno, str)					\
    302 	do {							\
    303 		struct wi_ltv_str	s;			\
    304 		int			l;			\
    305 								\
    306 		l = (strlen(str) + 1) & ~0x1;			\
    307 		bzero((char *)&s, sizeof(s));			\
    308 		s.wi_len = (l / 2) + 2;				\
    309 		s.wi_type = recno;				\
    310 		s.wi_str[0] = strlen(str);			\
    311 		bcopy(str, (char *)&s.wi_str[1], strlen(str));	\
    312 		wi_write_record(sc, (struct wi_ltv_gen *)&s);	\
    313 	} while (0)
    314 
    315 /*
    316  * Download buffer location and length (0xFD01).
    317  */
    318 #define WI_RID_DNLD_BUF		0xFD01
    319 struct wi_ltv_dnld_buf {
    320 	u_int16_t		wi_len;
    321 	u_int16_t		wi_type;
    322 	u_int16_t		wi_buf_pg; /* page addr of intermediate dl buf*/
    323 	u_int16_t		wi_buf_off; /* offset of idb */
    324 	u_int16_t		wi_buf_len; /* len of idb */
    325 };
    326 
    327 /*
    328  * Mem sizes (0xFD02).
    329  */
    330 #define WI_RID_MEMSZ		0xFD02
    331 struct wi_ltv_memsz {
    332 	u_int16_t		wi_len;
    333 	u_int16_t		wi_type;
    334 	u_int16_t		wi_mem_ram;
    335 	u_int16_t		wi_mem_nvram;
    336 };
    337 
    338 /*
    339  * List of intended regulatory domains (0xFD11).
    340  */
    341 #define WI_RID_DOMAINS		0xFD11
    342 struct wi_ltv_domains {
    343 	u_int16_t		wi_len;
    344 	u_int16_t		wi_type;
    345 	u_int16_t		wi_domains[6];
    346 };
    347 
    348 /*
    349  * CIS struct (0xFD13).
    350  */
    351 #define WI_RID_CIS		0xFD13
    352 struct wi_ltv_cis {
    353 	u_int16_t		wi_len;
    354 	u_int16_t		wi_type;
    355 	u_int16_t		wi_cis[240];
    356 };
    357 
    358 /*
    359  * Communications quality (0xFD43).
    360  */
    361 #define WI_RID_COMMQUAL		0xFD43
    362 struct wi_ltv_commqual {
    363 	u_int16_t		wi_len;
    364 	u_int16_t		wi_type;
    365 	u_int16_t		wi_coms_qual;
    366 	u_int16_t		wi_sig_lvl;
    367 	u_int16_t		wi_noise_lvl;
    368 };
    369 
    370 /*
    371  * Actual system scale thresholds (0xFD46).
    372  */
    373 #define WI_RID_SYSTEM_SCALE	0xFC06
    374 #define WI_RID_SCALETHRESH	0xFD46
    375 struct wi_ltv_scalethresh {
    376 	u_int16_t		wi_len;
    377 	u_int16_t		wi_type;
    378 	u_int16_t		wi_energy_detect;
    379 	u_int16_t		wi_carrier_detect;
    380 	u_int16_t		wi_defer;
    381 	u_int16_t		wi_cell_search;
    382 	u_int16_t		wi_out_of_range;
    383 	u_int16_t		wi_delta_snr;
    384 };
    385 
    386 /*
    387  * PCF info struct (0xFD87).
    388  */
    389 #define WI_RID_PCF		0xFD87
    390 struct wi_ltv_pcf {
    391 	u_int16_t		wi_len;
    392 	u_int16_t		wi_type;
    393 	u_int16_t		wi_medium_occupancy_limit;
    394 	u_int16_t		wi_cfp_period;
    395 	u_int16_t		wi_cfp_max_duration;
    396 };
    397 
    398 /*
    399  * Connection control characteristics.
    400  * 1 == Basic Service Set (BSS)
    401  * 2 == Wireless Distribudion System (WDS)
    402  * 3 == Pseudo IBSS
    403  */
    404 #define WI_RID_PORTTYPE		0xFC00
    405 #define WI_PORTTYPE_BSS		0x1
    406 #define WI_PORTTYPE_WDS		0x2
    407 #define WI_PORTTYPE_ADHOC	0x3
    408 
    409 /*
    410  * Mac addresses.
    411  */
    412 #define WI_RID_MAC_NODE		0xFC01
    413 #define WI_RID_MAC_WDS		0xFC08
    414 struct wi_ltv_macaddr {
    415 	u_int16_t		wi_len;
    416 	u_int16_t		wi_type;
    417 	u_int8_t		wi_mac_addr[6];
    418 };
    419 
    420 /*
    421  * Station set identification (SSID).
    422  */
    423 #define WI_RID_DESIRED_SSID	0xFC02
    424 #define WI_RID_OWN_SSID		0xFC04
    425 struct wi_ltv_ssid {
    426 	u_int16_t		wi_len;
    427 	u_int16_t		wi_type;
    428 	u_int16_t		wi_id[17];
    429 };
    430 
    431 /*
    432  * Set communications channel (radio frequency).
    433  */
    434 #define WI_RID_OWN_CHNL		0xFC03
    435 
    436 /*
    437  * Frame data size.
    438  */
    439 #define WI_RID_MAX_DATALEN	0xFC07
    440 
    441 /*
    442  * ESS power management enable
    443  */
    444 #define WI_RID_PM_ENABLED	0xFC09
    445 
    446 /*
    447  * ESS max PM sleep internal
    448  */
    449 #define WI_RID_MAX_SLEEP	0xFC0C
    450 
    451 /*
    452  * Set our station name.
    453  */
    454 #define WI_RID_NODENAME		0xFC0E
    455 struct wi_ltv_nodename {
    456 	u_int16_t		wi_len;
    457 	u_int16_t		wi_type;
    458 	u_int16_t		wi_nodename[17];
    459 };
    460 
    461 /*
    462  * Multicast addresses to be put in filter. We're
    463  * allowed up to 16 addresses in the filter.
    464  */
    465 #define WI_RID_MCAST		0xFC80
    466 struct wi_ltv_mcast {
    467 	u_int16_t		wi_len;
    468 	u_int16_t		wi_type;
    469 	struct ether_addr	wi_mcast[16];
    470 };
    471 
    472 /*
    473  * Create IBSS.
    474  */
    475 #define WI_RID_CREATE_IBSS	0xFC81
    476 
    477 #define WI_RID_FRAG_THRESH	0xFC82
    478 #define WI_RID_RTS_THRESH	0xFC83
    479 
    480 /*
    481  * TX rate control
    482  * 0 == Fixed 1mbps
    483  * 1 == Fixed 2mbps
    484  * 2 == auto fallback
    485  */
    486 #define WI_RID_TX_RATE		0xFC84
    487 
    488 /*
    489  * promiscuous mode.
    490  */
    491 #define WI_RID_PROMISC		0xFC85
    492 
    493 /*
    494  * Auxiliary Timer tick interval
    495  */
    496 #define WI_RID_TICK_TIME	0xFCE0
    497 
    498 /*
    499  * Information frame types.
    500  */
    501 #define WI_INFO_NOTIFY		0xF000	/* Handover address */
    502 #define WI_INFO_COUNTERS	0xF100	/* Statistics counters */
    503 #define WI_INFO_SCAN_RESULTS	0xF101	/* Scan results */
    504 #define WI_INFO_LINK_STAT	0xF200	/* Link status */
    505 #define WI_INFO_ASSOC_STAT	0xF201	/* Association status */
    506 
    507 /*
    508  * Hermes transmit/receive frame structure
    509  */
    510 struct wi_frame {
    511 	u_int16_t		wi_status;	/* 0x00 */
    512 	u_int16_t		wi_rsvd0;	/* 0x02 */
    513 	u_int16_t		wi_rsvd1;	/* 0x04 */
    514 	u_int16_t		wi_q_info;	/* 0x06 */
    515 	u_int16_t		wi_rsvd2;	/* 0x08 */
    516 	u_int16_t		wi_rsvd3;	/* 0x0A */
    517 	u_int16_t		wi_tx_ctl;	/* 0x0C */
    518 	u_int16_t		wi_frame_ctl;	/* 0x0E */
    519 	u_int16_t		wi_id;		/* 0x10 */
    520 	u_int8_t		wi_addr1[6];	/* 0x12 */
    521 	u_int8_t		wi_addr2[6];	/* 0x18 */
    522 	u_int8_t		wi_addr3[6];	/* 0x1E */
    523 	u_int16_t		wi_seq_ctl;	/* 0x24 */
    524 	u_int8_t		wi_addr4[6];	/* 0x26 */
    525 	u_int16_t		wi_dat_len;	/* 0x2C */
    526 	u_int8_t		wi_dst_addr[6];	/* 0x2E */
    527 	u_int8_t		wi_src_addr[6];	/* 0x34 */
    528 	u_int16_t		wi_len;		/* 0x3A */
    529 	u_int16_t		wi_dat[3];	/* 0x3C */ /* SNAP header */
    530 	u_int16_t		wi_type;	/* 0x42 */
    531 };
    532 
    533 #define WI_802_3_OFFSET		0x2E
    534 #define WI_802_11_OFFSET	0x44
    535 #define WI_802_11_OFFSET_RAW	0x3C
    536 
    537 #define WI_STAT_BADCRC		0x0001
    538 #define WI_STAT_UNDECRYPTABLE	0x0002
    539 #define WI_STAT_ERRSTAT		0x0003
    540 #define WI_STAT_MAC_PORT	0x0700
    541 #define WI_STAT_1042		0x2000	/* RFC1042 encoded */
    542 #define WI_STAT_TUNNEL		0x4000	/* Bridge-tunnel encoded */
    543 #define WI_STAT_WMP_MSG		0x6000	/* WaveLAN-II management protocol */
    544 #define WI_RXSTAT_MSG_TYPE	0xE000
    545 
    546 #define WI_ENC_TX_802_3		0x00
    547 #define WI_ENC_TX_802_11	0x11
    548 #define WI_ENC_TX_E_II		0x0E
    549 
    550 #define WI_ENC_TX_1042		0x00
    551 #define WI_ENC_TX_TUNNEL	0xF8
    552 
    553 #define WI_TXCNTL_MACPORT	0x00FF
    554 #define WI_TXCNTL_STRUCTTYPE	0xFF00
    555 
    556 /*
    557  * SNAP (sub-network access protocol) constants for transmission
    558  * of IP datagrams over IEEE 802 networks, taken from RFC1042.
    559  * We need these for the LLC/SNAP header fields in the TX/RX frame
    560  * structure.
    561  */
    562 #define WI_SNAP_K1		0xaa	/* assigned global SAP for SNAP */
    563 #define WI_SNAP_K2		0x00
    564 #define WI_SNAP_CONTROL		0x03	/* unnumbered information format */
    565 #define WI_SNAP_WORD0		(WI_SNAP_K1 | (WI_SNAP_K1 << 8))
    566 #define WI_SNAP_WORD1		(WI_SNAP_K2 | (WI_SNAP_CONTROL << 8))
    567 #define WI_SNAPHDR_LEN		0x6
    568