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/*-
* Copyright (c) 2002, 2003 Sam Leffler, Errno Consulting, Atheros
* Communications, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the following conditions are met:
* 1. The materials contained herein are unmodified and are used
* unmodified.
* 2. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following NO
* ''WARRANTY'' disclaimer below (''Disclaimer''), without
* modification.
* 3. Redistributions in binary form must reproduce at minimum a
* disclaimer similar to the Disclaimer below and any redistribution
* must be conditioned upon including a substantially similar
* Disclaimer requirement for further binary redistribution.
* 4. Neither the names of the above-listed copyright holders nor the
* names of any contributors may be used to endorse or promote
* product derived from this software without specific prior written
* permission.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT,
* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
* FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGES.
*
* $Id: ah.h,v 1.35 2003/07/21 02:36:53 sam Exp $
*/
#ifndef _ATH_AH_H_
#define _ATH_AH_H_
/*
* Atheros Hardware Access Layer
*
* Clients of the HAL call ath_hal_attach to obtain a reference to an ath_hal
* structure for use with the device. Hardware-related operations that
* follow must call back into the HAL through interface, supplying the
* reference as the first parameter.
*/
#include "ah_osdep.h"
/*
* Status codes that may be returned by the HAL. Note that
* interfaces that return a status code set it only when an
* error occurs--i.e. you cannot check it for success.
*/
typedef enum {
HAL_OK = 0, /* No error */
HAL_ENXIO, /* No hardware present */
HAL_ENOMEM, /* Memory allocation failed */
HAL_EIO, /* Hardware didn't respond as expected */
HAL_EEMAGIC, /* EEPROM magic number invalid */
HAL_EEVERSION, /* EEPROM version invalid */
HAL_EELOCKED, /* EEPROM unreadable */
HAL_EEBADSUM, /* EEPROM checksum invalid */
HAL_EEREAD, /* EEPROM read problem */
HAL_EEBADMAC, /* EEPROM mac address invalid */
HAL_EESIZE, /* EEPROM size not supported */
HAL_EEWRITE, /* Attempt to change write-locked EEPROM */
HAL_EINVAL, /* Invalid parameter to function */
HAL_ENOTSUPP, /* Hardware revision not supported */
HAL_ESELFTEST, /* Hardware self-test failed */
HAL_EINPROGRESS, /* Operation incomplete */
} HAL_STATUS;
typedef enum {
AH_FALSE = 0, /* NB: lots of code assumes false is zero */
AH_TRUE = 1,
} HAL_BOOL;
/*
* "States" for setting the LED. These correspond to
* the possible 802.11 operational states and there may
* be a many-to-one mapping between these states and the
* actual hardware states for the LED's (i.e. the hardware
* may have fewer states).
*/
typedef enum {
HAL_LED_INIT = 0,
HAL_LED_SCAN = 1,
HAL_LED_AUTH = 2,
HAL_LED_ASSOC = 3,
HAL_LED_RUN = 4
} HAL_LED_STATE;
/*
* Transmit queue types/numbers. These are used to tag
* each transmit queue in the hardware and to identify a set
* of transmit queues for operations such as start/stop dma.
*/
typedef enum {
HAL_TX_QUEUE_INACTIVE = 0, /* queue is inactive/unused */
HAL_TX_QUEUE_DATA, /* data xmit q's */
HAL_TX_QUEUE_BEACON, /* beacon xmit q */
HAL_TX_QUEUE_CAB, /* "crap after beacon" xmit q */
HAL_TX_QUEUE_PSPOLL, /* power-save poll xmit q */
} HAL_TX_QUEUE;
#define HAL_NUM_TX_QUEUES 10 /* max possible # of queues */
/*
* Transmit packet types. This belongs in ah_desc.h, but
* is here so we can give a proper type to various parameters
* (and not require everyone include the file).
*
* NB: These values are intentionally assigned for
* direct use when setting up h/w descriptors.
*/
typedef enum {
HAL_PKT_TYPE_NORMAL = 0,
HAL_PKT_TYPE_ATIM = 1,
HAL_PKT_TYPE_PSPOLL = 2,
HAL_PKT_TYPE_BEACON = 3,
HAL_PKT_TYPE_PROBE_RESP = 4,
} HAL_PKT_TYPE;
/* Rx Filter Frame Types */
typedef enum {
HAL_RX_FILTER_UCAST = 0x00000001, /* Allow unicast frames */
HAL_RX_FILTER_MCAST = 0x00000002, /* Allow multicast frames */
HAL_RX_FILTER_BCAST = 0x00000004, /* Allow broadcast frames */
HAL_RX_FILTER_CONTROL = 0x00000008, /* Allow control frames */
HAL_RX_FILTER_BEACON = 0x00000010, /* Allow beacon frames */
HAL_RX_FILTER_PROM = 0x00000020, /* Promiscuous mode */
HAL_RX_FILTER_PROBEREQ = 0x00000080, /* Allow probe request frames */
HAL_RX_FILTER_PHYERR = 0x00000100, /* Allow phy errors */
HAL_RX_FILTER_PHYRADAR = 0x00000200, /* Allow phy radar errors*/
} HAL_RX_FILTER;
typedef enum {
HAL_PM_UNDEFINED = 0,
HAL_PM_AUTO = 1,
HAL_PM_AWAKE = 2,
HAL_PM_FULL_SLEEP = 3,
HAL_PM_NETWORK_SLEEP = 4
} HAL_POWER_MODE;
/*
* NOTE WELL:
* These are mapped to take advantage of the common locations for many of
* the bits on all of the currently supported MAC chips. This is to make
* the ISR as efficient as possible, while still abstracting HW differences.
* When new hardware breaks this commonality this enumerated type, as well
* as the HAL functions using it, must be modified. All values are directly
* mapped unless commented otherwise.
*/
typedef enum {
HAL_INT_RX = 0x00000001, /* Non-common mapping */
HAL_INT_RXDESC = 0x00000002,
HAL_INT_RXNOFRM = 0x00000008,
HAL_INT_RXEOL = 0x00000010,
HAL_INT_RXORN = 0x00000020,
HAL_INT_TX = 0x00000040, /* Non-common mapping */
HAL_INT_TXDESC = 0x00000080,
HAL_INT_TXURN = 0x00000800,
HAL_INT_MIB = 0x00001000,
HAL_INT_RXPHY = 0x00004000,
HAL_INT_RXKCM = 0x00008000,
HAL_INT_SWBA = 0x00010000,
HAL_INT_BMISS = 0x00040000,
HAL_INT_BNR = 0x00100000, /* Non-common mapping */
HAL_INT_GPIO = 0x01000000,
HAL_INT_FATAL = 0x40000000, /* Non-common mapping */
HAL_INT_GLOBAL = 0x80000000, /* Set/clear IER */
/* Interrupt bits that map directly to ISR/IMR bits */
HAL_INT_COMMON = HAL_INT_RXNOFRM
| HAL_INT_RXDESC
| HAL_INT_RXEOL
| HAL_INT_RXORN
| HAL_INT_TXURN
| HAL_INT_TXDESC
| HAL_INT_MIB
| HAL_INT_RXPHY
| HAL_INT_RXKCM
| HAL_INT_SWBA
| HAL_INT_BMISS
| HAL_INT_GPIO,
HAL_INT_NOCARD = 0xffffffff /* To signal the card was removed */
} HAL_INT;
typedef enum {
HAL_RFGAIN_INACTIVE,
HAL_RFGAIN_READ_REQUESTED,
HAL_RFGAIN_NEED_CHANGE
} HAL_RFGAIN;
/*
* Channels are specified by frequency.
*/
typedef struct {
u_int16_t channel; /* setting in Mhz */
u_int16_t channelFlags; /* see below */
} HAL_CHANNEL;
#define CHANNEL_RAD_INT 0x0001 /* Radar interference detected on channel */
#define CHANNEL_CW_INT 0x0002 /* CW interference detected on channel */
#define CHANNEL_BUSY 0x0004 /* Busy, occupied or overlap with adjoin chan */
#define CHANNEL_TURBO 0x0010 /* Turbo Channel */
#define CHANNEL_CCK 0x0020 /* CCK channel */
#define CHANNEL_OFDM 0x0040 /* OFDM channel */
#define CHANNEL_2GHZ 0x0080 /* 2 GHz spectrum channel. */
#define CHANNEL_5GHZ 0x0100 /* 5 GHz spectrum channel */
#define CHANNEL_PASSIVE 0x0200 /* Only passive scan allowed in the channel */
#define CHANNEL_DYN 0x0400 /* dynamic CCK-OFDM channel */
#define CHANNEL_A (CHANNEL_5GHZ|CHANNEL_OFDM)
#define CHANNEL_B (CHANNEL_2GHZ|CHANNEL_CCK)
#define CHANNEL_PUREG (CHANNEL_2GHZ|CHANNEL_OFDM)
#ifdef notdef
#define CHANNEL_G (CHANNEL_2GHZ|CHANNEL_DYN)
#else
#define CHANNEL_G (CHANNEL_2GHZ|CHANNEL_OFDM)
#endif
#define CHANNEL_T (CHANNEL_5GHZ|CHANNEL_OFDM|CHANNEL_TURBO)
#define CHANNEL_ALL \
(CHANNEL_OFDM|CHANNEL_CCK|CHANNEL_5GHZ|CHANNEL_2GHZ|CHANNEL_TURBO)
#define CHANNEL_ALL_NOTURBO (CHANNEL_ALL &~ CHANNEL_TURBO)
typedef struct {
u_int32_t ackrcv_bad;
u_int32_t rts_bad;
u_int32_t rts_good;
u_int32_t fcs_bad;
u_int32_t beacons;
} HAL_MIB_STATS;
typedef u_int16_t HAL_CTRY_CODE; /* country code */
typedef u_int16_t HAL_REG_DOMAIN; /* regulatory domain code */
enum {
CTRY_DEBUG = 0x1ff, /* debug country code */
CTRY_DEFAULT = 0 /* default country code */
};
enum {
HAL_MODE_11A = 0x001,
HAL_MODE_TURBO = 0x002,
HAL_MODE_11B = 0x004,
HAL_MODE_PUREG = 0x008,
#ifdef notdef
HAL_MODE_11G = 0x010,
#else
HAL_MODE_11G = 0x008,
#endif
HAL_MODE_ALL = 0xfff
};
typedef struct {
u_int16_t rateCount;
u_int8_t rateCodeToIndex[32]; /* back mapping */
struct {
u_int8_t valid; /* valid for rate control use */
u_int8_t phy; /* CCK/OFDM/XR */
u_int16_t rateKbps; /* transfer rate in kbs */
u_int8_t rateCode; /* rate for h/w descriptors */
u_int8_t shortPreamble; /* mask for enabling short
* preamble in CCK rate code */
u_int8_t dot11Rate; /* value for supported rates
* info element of MLME */
u_int8_t controlRate; /* index of next lower basic
* rate; used for dur. calcs */
} info[32];
} HAL_RATE_TABLE;
typedef struct {
u_int rs_count; /* number of valid entries */
u_int8_t rs_rates[32]; /* rates */
} HAL_RATE_SET;
typedef enum {
HAL_ANT_VARIABLE, /* variable by programming */
HAL_ANT_FIXED_A, /* fixed to 11a frequencies */
HAL_ANT_FIXED_B, /* fixed to 11b frequencies */
} HAL_ANT_SETTING;
typedef enum {
HAL_M_STA = 1, /* infrastructure station */
HAL_M_IBSS = 0, /* IBSS (adhoc) station */
HAL_M_HOSTAP = 6, /* Software Access Point */
HAL_M_MONITOR = 8 /* Monitor mode */
} HAL_OPMODE;
typedef struct {
int wk_len;
u_int8_t wk_key[16]; /* XXX big enough for WEP */
} HAL_KEYVAL;
typedef enum {
HAL_CIPHER_WEP,
HAL_CIPHER_AES_CCM,
HAL_CIPHER_CKIP
} HAL_CIPHER;
/*
* Per-station beacon timer state.
*/
typedef struct {
u_int32_t bs_nexttbtt; /* next beacon in TU */
u_int32_t bs_nextdtim; /* next DTIM in TU */
u_int16_t bs_intval; /* beacon interval/period */
u_int8_t bs_dtimperiod;
u_int8_t bs_cfpperiod; /* # of DTIMs between CFPs */
u_int16_t bs_cfpmaxduration; /* max CFP duration in TU */
u_int16_t bs_cfpduremain; /* remaining CFP duration */
u_int16_t bs_timoffset;
u_int16_t bs_sleepduration; /* max sleep duration */
u_int16_t bs_bmissthreshold; /* beacon miss threshold */
} HAL_BEACON_STATE;
struct ath_desc;
/*
* Hardware Access Layer (HAL) API.
*
* Clients of the HAL call ath_hal_attach to obtain a reference to an
* ath_hal structure for use with the device. Hardware-related operations
* that follow must call back into the HAL through interface, supplying
* the reference as the first parameter.
*/
struct ath_hal {
u_int32_t ah_magic; /* consistency check magic number */
u_int16_t ah_devid; /* PCI device ID */
u_int16_t ah_subvendorid; /* PCI subvendor ID */
HAL_SOFTC ah_sc; /* back pointer to driver/os state */
HAL_BUS_TAG ah_st; /* params for register r+w */
HAL_BUS_HANDLE ah_sh;
HAL_CTRY_CODE ah_countryCode;
const HAL_RATE_TABLE *(*ah_getRateTable)(struct ath_hal *, u_int mode);
void (*ah_detach)(struct ath_hal*);
/* Reset functions */
HAL_BOOL (*ah_reset)(struct ath_hal *, HAL_OPMODE,
HAL_CHANNEL *, HAL_BOOL bChannelChange,
HAL_STATUS *status);
HAL_BOOL (*ah_setPCUConfig)(struct ath_hal *, HAL_OPMODE);
HAL_BOOL (*ah_perCalibration)(struct ath_hal*, HAL_CHANNEL *);
/* Transmit functions */
HAL_BOOL (*ah_updateTxTrigLevel)(struct ath_hal*,
HAL_BOOL incTrigLevel);
int (*ah_setupTxQueue)(struct ath_hal *, HAL_TX_QUEUE type,
HAL_BOOL irq);
HAL_BOOL (*ah_releaseTxQueue)(struct ath_hal *ah, u_int q);
HAL_BOOL (*ah_resetTxQueue)(struct ath_hal *ah, u_int q);
u_int32_t (*ah_getTxDP)(struct ath_hal*, u_int);
HAL_BOOL (*ah_setTxDP)(struct ath_hal*, u_int, u_int32_t txdp);
HAL_BOOL (*ah_startTxDma)(struct ath_hal*, u_int);
HAL_BOOL (*ah_stopTxDma)(struct ath_hal*, u_int);
HAL_BOOL (*ah_setupTxDesc)(struct ath_hal *, struct ath_desc *,
u_int pktLen, u_int hdrLen,
HAL_PKT_TYPE type, u_int txPower,
u_int txRate0, u_int txTries0,
u_int keyIx, u_int antMode, u_int flags,
u_int rtsctsRate, u_int rtsctsDuration);
HAL_BOOL (*ah_setupXTxDesc)(struct ath_hal *, struct ath_desc *,
HAL_BOOL shortPreamble,
u_int txRate1, u_int txTries1,
u_int txRate2, u_int txTries2,
u_int txRate3, u_int txTries3);
HAL_BOOL (*ah_fillTxDesc)(struct ath_hal *, struct ath_desc *,
u_int segLen, HAL_BOOL firstSeg,
HAL_BOOL lastSeg);
HAL_STATUS (*ah_procTxDesc)(struct ath_hal *, struct ath_desc *);
HAL_BOOL (*ah_hasVEOL)(struct ath_hal *);
/* Receive Functions */
u_int32_t (*ah_getRxDP)(struct ath_hal*);
void (*ah_setRxDP)(struct ath_hal*, u_int32_t rxdp);
void (*ah_enableReceive)(struct ath_hal*);
HAL_BOOL (*ah_stopDmaReceive)(struct ath_hal*);
void (*ah_startPcuReceive)(struct ath_hal*);
void (*ah_stopPcuReceive)(struct ath_hal*);
void (*ah_setMulticastFilter)(struct ath_hal*,
u_int32_t filter0, u_int32_t filter1);
HAL_BOOL (*ah_setMulticastFilterIndex)(struct ath_hal*,
u_int32_t index);
HAL_BOOL (*ah_clrMulticastFilterIndex)(struct ath_hal*,
u_int32_t index);
u_int32_t (*ah_getRxFilter)(struct ath_hal*);
void (*ah_setRxFilter)(struct ath_hal*, u_int32_t);
HAL_BOOL (*ah_setupRxDesc)(struct ath_hal *, struct ath_desc *,
u_int32_t size, u_int flags);
HAL_STATUS (*ah_procRxDesc)(struct ath_hal *, struct ath_desc *);
void (*ah_rxMonitor)(struct ath_hal *);
/* Misc Functions */
void (*ah_dumpState)(struct ath_hal *);
void (*ah_dumpEeprom)(struct ath_hal *);
void (*ah_dumpRfGain)(struct ath_hal *);
void (*ah_dumpAni)(struct ath_hal *);
void (*ah_getMacAddress)(struct ath_hal *, u_int8_t *);
HAL_BOOL (*ah_setRegulatoryDomain)(struct ath_hal*,
u_int16_t, HAL_STATUS *);
void (*ah_setLedState)(struct ath_hal*, HAL_LED_STATE);
void (*ah_writeAssocid)(struct ath_hal*,
const u_int8_t *bssid, u_int16_t assocId,
u_int16_t timOffset);
u_int32_t (*ah_gpioGet)(struct ath_hal*, u_int32_t gpio);
void (*ah_gpioSetIntr)(struct ath_hal*, u_int, u_int32_t);
u_int32_t (*ah_getTsf32)(struct ath_hal*);
u_int64_t (*ah_getTsf64)(struct ath_hal*);
void (*ah_resetTsf)(struct ath_hal*);
u_int16_t (*ah_getRegDomain)(struct ath_hal*);
u_int (*ah_getWirelessModes)(struct ath_hal*);
HAL_BOOL (*ah_getRfKill)(struct ath_hal*);
u_int32_t (*ah_getRandomSeed)(struct ath_hal*);
HAL_BOOL (*ah_detectCardPresent)(struct ath_hal*);
void (*ah_updateMibCounters)(struct ath_hal*, HAL_MIB_STATS*);
HAL_BOOL (*ah_isHwCipherSupported)(struct ath_hal*, HAL_CIPHER);
HAL_RFGAIN (*ah_getRfGain)(struct ath_hal*);
#if 0
u_int32_t (*ah_getCurRssi)(struct ath_hal*);
u_int32_t (*ah_getDefAntenna)(struct ath_hal*);
void (*ah_setDefAntenna)(struct ath_hal*, u_int32_t antenna);
#endif
/* Key Cache Functions */
u_int32_t (*ah_getKeyCacheSize)(struct ath_hal*);
HAL_BOOL (*ah_resetKeyCacheEntry)(struct ath_hal*, u_int16_t);
HAL_BOOL (*ah_isKeyCacheEntryValid)(struct ath_hal *, u_int16_t);
HAL_BOOL (*ah_setKeyCacheEntry)(struct ath_hal*,
u_int16_t, const HAL_KEYVAL *, u_int8_t *, int);
HAL_BOOL (*ah_setKeyCacheEntryMac)(struct ath_hal*,
u_int16_t, u_int8_t *);
/* Power Management Functions */
HAL_BOOL (*ah_setPowerMode)(struct ath_hal*,
HAL_POWER_MODE mode, int setChip,
u_int16_t sleepDuration);
HAL_POWER_MODE (*ah_getPowerMode)(struct ath_hal*);
HAL_BOOL (*ah_queryPSPollSupport)(struct ath_hal*);
HAL_BOOL (*ah_initPSPoll)(struct ath_hal*);
HAL_BOOL (*ah_enablePSPoll)(struct ath_hal *,
u_int8_t *, u_int16_t);
HAL_BOOL (*ah_disablePSPoll)(struct ath_hal *);
/* Beacon Management Functions */
void (*ah_beaconInit)(struct ath_hal *, HAL_OPMODE,
u_int32_t, u_int32_t);
void (*ah_setStationBeaconTimers)(struct ath_hal*,
const HAL_BEACON_STATE *, u_int32_t tsf,
u_int32_t dtimCount, u_int32_t cfpCcount);
void (*ah_resetStationBeaconTimers)(struct ath_hal*);
HAL_BOOL (*ah_waitForBeaconDone)(struct ath_hal *,
HAL_BUS_ADDR);
/* Interrupt functions */
HAL_BOOL (*ah_isInterruptPending)(struct ath_hal*);
HAL_BOOL (*ah_getPendingInterrupts)(struct ath_hal*, HAL_INT *);
HAL_INT (*ah_getInterrupts)(struct ath_hal*);
HAL_INT (*ah_setInterrupts)(struct ath_hal*, HAL_INT);
};
/*
* Check the PCI vendor ID and device ID against Atheros' values
* and return a printable description for any Atheros hardware.
* AH_NULL is returned if the ID's do not describe Atheros hardware.
*/
extern const char *ath_hal_probe(u_int16_t vendorid, u_int16_t devid);
/*
* Attach the HAL for use with the specified device. The device is
* defined by the PCI device ID. The caller provides an opaque pointer
* to an upper-layer data structure (HAL_SOFTC) that is stored in the
* HAL state block for later use. Hardware register accesses are done
* using the specified bus tag and handle. On successful return a
* reference to a state block is returned that must be supplied in all
* subsequent HAL calls. Storage associated with this reference is
* dynamically allocated and must be freed by calling the ah_detach
* method when the client is done. If the attach operation fails a
* null (AH_NULL) reference will be returned and a status code will
* be returned if the status parameter is non-zero.
*/
extern struct ath_hal *ath_hal_attach(u_int16_t devid, HAL_SOFTC,
HAL_BUS_TAG, HAL_BUS_HANDLE, HAL_STATUS* status);
/*
* Return a list of channels available for use with the hardware.
* The list is based on what the hardware is capable of, the specified
* country code, the modeSelect mask, and whether or not outdoor
* channels are to be permitted.
*
* The channel list is returned in the supplied array. maxchans
* defines the maximum size of this array. nchans contains the actual
* number of channels returned. If a problem occurred or there were
* no channels that met the criteria then AH_FALSE is returned.
*/
extern HAL_BOOL ath_hal_init_channels(struct ath_hal *,
HAL_CHANNEL *chans, u_int maxchans, u_int *nchans,
HAL_CTRY_CODE cc, u_int16_t modeSelect, int enableOutdoor);
/*
* Return bit mask of wireless modes supported by the hardware.
*/
extern u_int ath_hal_getwirelessmodes(struct ath_hal *ah, HAL_CTRY_CODE cc);
/*
* Return rate table for specified mode (11a, 11b, 11g, etc).
*/
extern const HAL_RATE_TABLE *ath_hal_getratetable(struct ath_hal *,
u_int mode);
/*
* Calculate the transmit duration of a frame.
*/
extern u_int16_t ath_hal_computetxtime(struct ath_hal *,
const HAL_RATE_TABLE *rates, u_int32_t frameLen,
u_int16_t rateix, HAL_BOOL shortPreamble);
/*
* Convert between IEEE channel number and channel frequency
* using the specified channel flags; e.g. CHANNEL_2GHZ.
*/
extern u_int ath_hal_mhz2ieee(u_int mhz, u_int flags);
extern u_int ath_hal_ieee2mhz(u_int ieee, u_int flags);
#endif /* _ATH_AH_H_ */
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