xref: /src/sys/external/isc/atheros_hal/dist/ah.h

/*
 * Copyright (c) 2002-2008 Sam Leffler, Errno Consulting
 * Copyright (c) 2002-2008 Atheros Communications, Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * $Id: ah.h,v 1.3 2011/02/21 11:06:38 cegger 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"

/*
 * __ahdecl is analogous to _cdecl; it defines the calling
 * convention used within the HAL.  For most systems this
 * can just default to be empty and the compiler will (should)
 * use _cdecl.  For systems where _cdecl is not compatible this
 * must be defined.  See linux/ah_osdep.h for an example.
 */
#ifndef __ahdecl
#define __ahdecl
#endif

/*
 * 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	= 1,	/* No hardware present */
	HAL_ENOMEM	= 2,	/* Memory allocation failed */
	HAL_EIO		= 3,	/* Hardware didn't respond as expected */
	HAL_EEMAGIC	= 4,	/* EEPROM magic number invalid */
	HAL_EEVERSION	= 5,	/* EEPROM version invalid */
	HAL_EELOCKED	= 6,	/* EEPROM unreadable */
	HAL_EEBADSUM	= 7,	/* EEPROM checksum invalid */
	HAL_EEREAD	= 8,	/* EEPROM read problem */
	HAL_EEBADMAC	= 9,	/* EEPROM mac address invalid */
	HAL_EESIZE	= 10,	/* EEPROM size not supported */
	HAL_EEWRITE	= 11,	/* Attempt to change write-locked EEPROM */
	HAL_EINVAL	= 12,	/* Invalid parameter to function */
	HAL_ENOTSUPP	= 13,	/* Hardware revision not supported */
	HAL_ESELFTEST	= 14,	/* Hardware self-test failed */
	HAL_EINPROGRESS	= 15,	/* Operation incomplete */
} HAL_STATUS;

typedef enum {
	AH_FALSE = 0,		/* NB: lots of code assumes false is zero */
	AH_TRUE  = 1,
} HAL_BOOL;

typedef enum {
	HAL_CAP_REG_DMN		= 0,	/* current regulatory domain */
	HAL_CAP_CIPHER		= 1,	/* hardware supports cipher */
	HAL_CAP_TKIP_MIC	= 2,	/* handle TKIP MIC in hardware */
	HAL_CAP_TKIP_SPLIT	= 3,	/* hardware TKIP uses split keys */
	HAL_CAP_PHYCOUNTERS	= 4,	/* hardware PHY error counters */
	HAL_CAP_DIVERSITY	= 5,	/* hardware supports fast diversity */
	HAL_CAP_KEYCACHE_SIZE	= 6,	/* number of entries in key cache */
	HAL_CAP_NUM_TXQUEUES	= 7,	/* number of hardware xmit queues */
	HAL_CAP_VEOL		= 9,	/* hardware supports virtual EOL */
	HAL_CAP_PSPOLL		= 10,	/* hardware has working PS-Poll support */
	HAL_CAP_DIAG		= 11,	/* hardware diagnostic support */
	HAL_CAP_COMPRESSION	= 12,	/* hardware supports compression */
	HAL_CAP_BURST		= 13,	/* hardware supports packet bursting */
	HAL_CAP_FASTFRAME	= 14,	/* hardware supoprts fast frames */
	HAL_CAP_TXPOW		= 15,	/* global tx power limit  */
	HAL_CAP_TPC		= 16,	/* per-packet tx power control  */
	HAL_CAP_PHYDIAG		= 17,	/* hardware phy error diagnostic */
	HAL_CAP_BSSIDMASK	= 18,	/* hardware supports bssid mask */
	HAL_CAP_MCAST_KEYSRCH	= 19,	/* hardware has multicast key search */
	HAL_CAP_TSF_ADJUST	= 20,	/* hardware has beacon tsf adjust */
	/* 21 was HAL_CAP_XR */
	HAL_CAP_WME_TKIPMIC 	= 22,   /* hardware can support TKIP MIC when WMM is turned on */
	/* 23 was HAL_CAP_CHAN_HALFRATE */
	/* 24 was HAL_CAP_CHAN_QUARTERRATE */
	HAL_CAP_RFSILENT	= 25,	/* hardware has rfsilent support  */
	HAL_CAP_TPC_ACK		= 26,	/* ack txpower with per-packet tpc */
	HAL_CAP_TPC_CTS		= 27,	/* cts txpower with per-packet tpc */
	HAL_CAP_11D		= 28,   /* 11d beacon support for changing cc */
	HAL_CAP_INTMIT		= 29,	/* interference mitigation */
	HAL_CAP_RXORN_FATAL	= 30,	/* HAL_INT_RXORN treated as fatal */
	HAL_CAP_HT		= 31,   /* hardware can support HT */
	HAL_CAP_TX_CHAINMASK	= 32,	/* mask of TX chains supported */
	HAL_CAP_RX_CHAINMASK	= 33,	/* mask of RX chains supported */
	HAL_CAP_RXTSTAMP_PREC	= 34,	/* rx desc tstamp precision (bits) */
	HAL_CAP_BB_HANG		= 35,	/* can baseband hang */
	HAL_CAP_MAC_HANG	= 36,	/* can MAC hang */
} HAL_CAPABILITY_TYPE;

/*
 * "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 state 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	= 1,		/* data xmit q's */
	HAL_TX_QUEUE_BEACON	= 2,		/* beacon xmit q */
	HAL_TX_QUEUE_CAB	= 3,		/* "crap after beacon" xmit q */
	HAL_TX_QUEUE_UAPSD	= 4,		/* u-apsd power save xmit q */
} HAL_TX_QUEUE;

#define	HAL_NUM_TX_QUEUES	10		/* max possible # of queues */

/*
 * Transmit queue subtype.  These map directly to
 * WME Access Categories (except for UPSD).  Refer
 * to Table 5 of the WME spec.
 */
typedef enum {
	HAL_WME_AC_BK	= 0,			/* background access category */
	HAL_WME_AC_BE	= 1, 			/* best effort access category*/
	HAL_WME_AC_VI	= 2,			/* video access category */
	HAL_WME_AC_VO	= 3,			/* voice access category */
	HAL_WME_UPSD	= 4,			/* uplink power save */
} HAL_TX_QUEUE_SUBTYPE;

/*
 * Transmit queue flags that control various
 * operational parameters.
 */
typedef enum {
	/*
	 * Per queue interrupt enables.  When set the associated
	 * interrupt may be delivered for packets sent through
	 * the queue.  Without these enabled no interrupts will
	 * be delivered for transmits through the queue.
	 */
	HAL_TXQ_TXOKINT_ENABLE	   = 0x0001,	/* enable TXOK interrupt */
	HAL_TXQ_TXERRINT_ENABLE	   = 0x0001,	/* enable TXERR interrupt */
	HAL_TXQ_TXDESCINT_ENABLE   = 0x0002,	/* enable TXDESC interrupt */
	HAL_TXQ_TXEOLINT_ENABLE	   = 0x0004,	/* enable TXEOL interrupt */
	HAL_TXQ_TXURNINT_ENABLE	   = 0x0008,	/* enable TXURN interrupt */
	/*
	 * Enable hardware compression for packets sent through
	 * the queue.  The compression buffer must be setup and
	 * packets must have a key entry marked in the tx descriptor.
	 */
	HAL_TXQ_COMPRESSION_ENABLE  = 0x0010,	/* enable h/w compression */
	/*
	 * Disable queue when veol is hit or ready time expires.
	 * By default the queue is disabled only on reaching the
	 * physical end of queue (i.e. a null link ptr in the
	 * descriptor chain).
	 */
	HAL_TXQ_RDYTIME_EXP_POLICY_ENABLE = 0x0020,
	/*
	 * Schedule frames on delivery of a DBA (DMA Beacon Alert)
	 * event.  Frames will be transmitted only when this timer
	 * fires, e.g to transmit a beacon in ap or adhoc modes.
	 */
	HAL_TXQ_DBA_GATED	    = 0x0040,	/* schedule based on DBA */
	/*
	 * Each transmit queue has a counter that is incremented
	 * each time the queue is enabled and decremented when
	 * the list of frames to transmit is traversed (or when
	 * the ready time for the queue expires).  This counter
	 * must be non-zero for frames to be scheduled for
	 * transmission.  The following controls disable bumping
	 * this counter under certain conditions.  Typically this
	 * is used to gate frames based on the contents of another
	 * queue (e.g. CAB traffic may only follow a beacon frame).
	 * These are meaningful only when frames are scheduled
	 * with a non-ASAP policy (e.g. DBA-gated).
	 */
	HAL_TXQ_CBR_DIS_QEMPTY	    = 0x0080,	/* disable on this q empty */
	HAL_TXQ_CBR_DIS_BEMPTY	    = 0x0100,	/* disable on beacon q empty */

	/*
	 * Fragment burst backoff policy.  Normally the no backoff
	 * is done after a successful transmission, the next fragment
	 * is sent at SIFS.  If this flag is set backoff is done
	 * after each fragment, regardless whether it was ack'd or
	 * not, after the backoff count reaches zero a normal channel
	 * access procedure is done before the next transmit (i.e.
	 * wait AIFS instead of SIFS).
	 */
	HAL_TXQ_FRAG_BURST_BACKOFF_ENABLE = 0x00800000,
	/*
	 * Disable post-tx backoff following each frame.
	 */
	HAL_TXQ_BACKOFF_DISABLE	    = 0x00010000, /* disable post backoff  */
	/*
	 * DCU arbiter lockout control.  This controls how
	 * lower priority tx queues are handled with respect to
	 * to a specific queue when multiple queues have frames
	 * to send.  No lockout means lower priority queues arbitrate
	 * concurrently with this queue.  Intra-frame lockout
	 * means lower priority queues are locked out until the
	 * current frame transmits (e.g. including backoffs and bursting).
	 * Global lockout means nothing lower can arbitrary so
	 * long as there is traffic activity on this queue (frames,
	 * backoff, etc).
	 */
	HAL_TXQ_ARB_LOCKOUT_INTRA   = 0x00020000, /* intra-frame lockout */
	HAL_TXQ_ARB_LOCKOUT_GLOBAL  = 0x00040000, /* full lockout s */

	HAL_TXQ_IGNORE_VIRTCOL	    = 0x00080000, /* ignore virt collisions */
	HAL_TXQ_SEQNUM_INC_DIS	    = 0x00100000, /* disable seqnum increment */
} HAL_TX_QUEUE_FLAGS;

typedef struct {
	uint32_t	tqi_ver;		/* hal TXQ version */
	HAL_TX_QUEUE_SUBTYPE tqi_subtype;	/* subtype if applicable */
	HAL_TX_QUEUE_FLAGS tqi_qflags;		/* flags (see above) */
	uint32_t	tqi_priority;		/* (not used) */
	uint32_t	tqi_aifs;		/* aifs */
	uint32_t	tqi_cwmin;		/* cwMin */
	uint32_t	tqi_cwmax;		/* cwMax */
	uint16_t	tqi_shretry;		/* rts retry limit */
	uint16_t	tqi_lgretry;		/* long retry limit (not used)*/
	uint32_t	tqi_cbrPeriod;		/* CBR period (us) */
	uint32_t	tqi_cbrOverflowLimit;	/* threshold for CBROVF int */
	uint32_t	tqi_burstTime;		/* max burst duration (us) */
	uint32_t	tqi_readyTime;		/* frame schedule time (us) */
	uint32_t	tqi_compBuf;		/* comp buffer phys addr */
} HAL_TXQ_INFO;

#define HAL_TQI_NONVAL 0xffff

/* token to use for aifs, cwmin, cwmax */
#define	HAL_TXQ_USEDEFAULT	((uint32_t) -1)

/* compression definitions */
#define HAL_COMP_BUF_MAX_SIZE           9216            /* 9K */
#define HAL_COMP_BUF_ALIGN_SIZE         512

/*
 * 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_CHIRP	= 5,
	HAL_PKT_TYPE_GRP_POLL	= 6,
	HAL_PKT_TYPE_AMPDU	= 7,
} 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_COMPBAR	= 0x00000400,	/* Allow compressed BAR */
} HAL_RX_FILTER;

typedef enum {
	HAL_PM_AWAKE		= 0,
	HAL_PM_FULL_SLEEP	= 1,
	HAL_PM_NETWORK_SLEEP	= 2,
	HAL_PM_UNDEFINED	= 3
} 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_TIM	= 0x00200000,	/* Non-common mapping */
	HAL_INT_DTIM	= 0x00400000,	/* Non-common mapping */
	HAL_INT_DTIMSYNC= 0x00800000,	/* Non-common mapping */
	HAL_INT_GPIO	= 0x01000000,
	HAL_INT_CABEND	= 0x02000000,	/* Non-common mapping */
	HAL_INT_TSFOOR	= 0x04000000,	/* Non-common mapping */
	HAL_INT_CST	= 0x10000000,	/* Non-common mapping */
	HAL_INT_GTT	= 0x20000000,	/* Non-common mapping */
	HAL_INT_FATAL	= 0x40000000,	/* Non-common mapping */
#define	HAL_INT_GLOBAL	0x80000000	/* Set/clear IER */
	HAL_INT_BMISC	= HAL_INT_TIM
			| HAL_INT_DTIM
			| HAL_INT_DTIMSYNC
			| HAL_INT_CABEND,

	/* 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;

typedef enum {
	HAL_RFGAIN_INACTIVE		= 0,
	HAL_RFGAIN_READ_REQUESTED	= 1,
	HAL_RFGAIN_NEED_CHANGE		= 2
} HAL_RFGAIN;

/*
 * Channels are specified by frequency.
 */
typedef struct {
	uint32_t	channelFlags;	/* see below */
	uint16_t	channel;	/* setting in Mhz */
	uint8_t		privFlags;
	int8_t		maxRegTxPower;	/* max regulatory tx power in dBm */
	int8_t		maxTxPower;	/* max true tx power in 0.5 dBm */
	int8_t		minTxPower;	/* min true tx power in 0.5 dBm */
} HAL_CHANNEL;

/* channelFlags */
#define	CHANNEL_CW_INT	0x00002	/* CW interference detected on channel */
#define	CHANNEL_TURBO	0x00010	/* Turbo Channel */
#define	CHANNEL_CCK	0x00020	/* CCK channel */
#define	CHANNEL_OFDM	0x00040	/* OFDM channel */
#define	CHANNEL_2GHZ	0x00080	/* 2 GHz spectrum channel */
#define	CHANNEL_5GHZ	0x00100	/* 5 GHz spectrum channel */
#define	CHANNEL_PASSIVE	0x00200	/* Only passive scan allowed in the channel */
#define	CHANNEL_DYN	0x00400	/* dynamic CCK-OFDM channel */
#define	CHANNEL_STURBO	0x02000	/* Static turbo, no 11a-only usage */
#define	CHANNEL_HALF    0x04000 /* Half rate channel */
#define	CHANNEL_QUARTER 0x08000 /* Quarter rate channel */
#define	CHANNEL_HT20	0x10000 /* 11n 20MHZ channel */
#define	CHANNEL_HT40PLUS 0x20000 /* 11n 40MHZ channel w/ ext chan above */
#define	CHANNEL_HT40MINUS 0x40000 /* 11n 40MHZ channel w/ ext chan below */

/* privFlags */
#define CHANNEL_INTERFERENCE   	0x01 /* Software use: channel interference
				        used for as AR as well as RADAR
				        interference detection */
#define CHANNEL_DFS		0x02 /* DFS required on channel */
#define CHANNEL_4MS_LIMIT	0x04 /* 4msec packet limit on this channel */
#define CHANNEL_DFS_CLEAR	0x08 /* if channel has been checked for DFS */

#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_ST	(CHANNEL_T|CHANNEL_STURBO)
#define	CHANNEL_108G	(CHANNEL_2GHZ|CHANNEL_OFDM|CHANNEL_TURBO)
#define	CHANNEL_108A	CHANNEL_T
#define	CHANNEL_G_HT20		(CHANNEL_G|CHANNEL_HT20)
#define	CHANNEL_A_HT20		(CHANNEL_A|CHANNEL_HT20)
#define	CHANNEL_G_HT40PLUS	(CHANNEL_G|CHANNEL_HT40PLUS)
#define	CHANNEL_G_HT40MINUS	(CHANNEL_G|CHANNEL_HT40MINUS)
#define	CHANNEL_A_HT40PLUS	(CHANNEL_A|CHANNEL_HT40PLUS)
#define	CHANNEL_A_HT40MINUS	(CHANNEL_A|CHANNEL_HT40MINUS)
#define	CHANNEL_ALL \
	(CHANNEL_OFDM | CHANNEL_CCK| CHANNEL_2GHZ | CHANNEL_5GHZ | \
	 CHANNEL_TURBO | CHANNEL_HT20 | CHANNEL_HT40PLUS | CHANNEL_HT40MINUS)
#define	CHANNEL_ALL_NOTURBO 	(CHANNEL_ALL &~ CHANNEL_TURBO)

#define HAL_ANTENNA_MIN_MODE  0
#define HAL_ANTENNA_FIXED_A   1
#define HAL_ANTENNA_FIXED_B   2
#define HAL_ANTENNA_MAX_MODE  3

typedef struct {
	uint32_t	ackrcv_bad;
	uint32_t	rts_bad;
	uint32_t	rts_good;
	uint32_t	fcs_bad;
	uint32_t	beacons;
} HAL_MIB_STATS;

typedef uint16_t HAL_CTRY_CODE;		/* country code */
typedef uint16_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,		/* 11a channels */
	HAL_MODE_TURBO	= 0x002,		/* 11a turbo-only channels */
	HAL_MODE_11B	= 0x004,		/* 11b channels */
	HAL_MODE_PUREG	= 0x008,		/* 11g channels (OFDM only) */
#ifdef notdef
	HAL_MODE_11G	= 0x010,		/* 11g channels (OFDM/CCK) */
#else
	HAL_MODE_11G	= 0x008,		/* XXX historical */
#endif
	HAL_MODE_108G	= 0x020,		/* 11g+Turbo channels */
	HAL_MODE_108A	= 0x040,		/* 11a+Turbo channels */
	HAL_MODE_11A_HALF_RATE = 0x200,		/* 11a half width channels */
	HAL_MODE_11A_QUARTER_RATE = 0x400,	/* 11a quarter width channels */
	HAL_MODE_11G_HALF_RATE = 0x800,		/* 11g half width channels */
	HAL_MODE_11G_QUARTER_RATE = 0x1000,	/* 11g quarter width channels */
	HAL_MODE_11NG_HT20	= 0x008000,
	HAL_MODE_11NA_HT20  	= 0x010000,
	HAL_MODE_11NG_HT40PLUS	= 0x020000,
	HAL_MODE_11NG_HT40MINUS	= 0x040000,
	HAL_MODE_11NA_HT40PLUS	= 0x080000,
	HAL_MODE_11NA_HT40MINUS	= 0x100000,
	HAL_MODE_ALL	= 0xffffff
};

typedef struct {
	int		rateCount;		/* NB: for proper padding */
	uint8_t		rateCodeToIndex[144];	/* back mapping */
	struct {
		uint8_t	valid;		/* valid for rate control use */
		uint8_t	phy;		/* CCK/OFDM/XR */
		uint32_t	rateKbps;	/* transfer rate in kbs */
		uint8_t		rateCode;	/* rate for h/w descriptors */
		uint8_t		shortPreamble;	/* mask for enabling short
						 * preamble in CCK rate code */
		uint8_t		dot11Rate;	/* value for supported rates
						 * info element of MLME */
		uint8_t		controlRate;	/* index of next lower basic
						 * rate; used for dur. calcs */
		uint16_t	lpAckDuration;	/* long preamble ACK duration */
		uint16_t	spAckDuration;	/* short preamble ACK duration*/
	} info[32];
} HAL_RATE_TABLE;

typedef struct {
	u_int		rs_count;		/* number of valid entries */
	uint8_t	rs_rates[32];		/* rates */
} HAL_RATE_SET;

/*
 * 802.11n specific structures and enums
 */
typedef enum {
	HAL_CHAINTYPE_TX	= 1,	/* Tx chain type */
	HAL_CHAINTYPE_RX	= 2,	/* RX chain type */
} HAL_CHAIN_TYPE;

typedef struct {
	u_int	Tries;
	u_int	Rate;
	u_int	PktDuration;
	u_int	ChSel;
	u_int	RateFlags;
#define	HAL_RATESERIES_RTS_CTS		0x0001	/* use rts/cts w/this series */
#define	HAL_RATESERIES_2040		0x0002	/* use ext channel for series */
#define	HAL_RATESERIES_HALFGI		0x0004	/* use half-gi for series */
} HAL_11N_RATE_SERIES;

typedef enum {
	HAL_HT_MACMODE_20	= 0,	/* 20 MHz operation */
	HAL_HT_MACMODE_2040	= 1,	/* 20/40 MHz operation */
} HAL_HT_MACMODE;

typedef enum {
	HAL_HT_PHYMODE_20	= 0,	/* 20 MHz operation */
	HAL_HT_PHYMODE_2040	= 1,	/* 20/40 MHz operation */
} HAL_HT_PHYMODE;

typedef enum {
	HAL_HT_EXTPROTSPACING_20 = 0,	/* 20 MHz spacing */
	HAL_HT_EXTPROTSPACING_25 = 1,	/* 25 MHz spacing */
} HAL_HT_EXTPROTSPACING;


typedef enum {
	HAL_RX_CLEAR_CTL_LOW	= 0x1,	/* force control channel to appear busy */
	HAL_RX_CLEAR_EXT_LOW	= 0x2,	/* force extension channel to appear busy */
} HAL_HT_RXCLEAR;

/*
 * Antenna switch control.  By default antenna selection
 * enables multiple (2) antenna use.  To force use of the
 * A or B antenna only specify a fixed setting.  Fixing
 * the antenna will also disable any diversity support.
 */
typedef enum {
	HAL_ANT_VARIABLE = 0,			/* variable by programming */
	HAL_ANT_FIXED_A	 = 1,			/* fixed antenna A */
	HAL_ANT_FIXED_B	 = 2,			/* fixed antenna B */
} 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 {
	uint8_t		kv_type;		/* one of HAL_CIPHER */
	uint8_t		kv_pad;
	uint16_t	kv_len;			/* length in bits */
	uint8_t		kv_val[16];		/* enough for 128-bit keys */
	uint8_t		kv_mic[8];		/* TKIP MIC key */
	uint8_t		kv_txmic[8];		/* TKIP TX MIC key (optional) */
} HAL_KEYVAL;

typedef enum {
	HAL_CIPHER_WEP		= 0,
	HAL_CIPHER_AES_OCB	= 1,
	HAL_CIPHER_AES_CCM	= 2,
	HAL_CIPHER_CKIP		= 3,
	HAL_CIPHER_TKIP		= 4,
	HAL_CIPHER_CLR		= 5,		/* no encryption */

	HAL_CIPHER_MIC		= 127		/* TKIP-MIC, not a cipher */
} HAL_CIPHER;

enum {
	HAL_SLOT_TIME_6	 = 6,			/* NB: for turbo mode */
	HAL_SLOT_TIME_9	 = 9,
	HAL_SLOT_TIME_20 = 20,
};

/*
 * Per-station beacon timer state.  Note that the specified
 * beacon interval (given in TU's) can also include flags
 * to force a TSF reset and to enable the beacon xmit logic.
 * If bs_cfpmaxduration is non-zero the hardware is setup to
 * coexist with a PCF-capable AP.
 */
typedef struct {
	uint32_t	bs_nexttbtt;		/* next beacon in TU */
	uint32_t	bs_nextdtim;		/* next DTIM in TU */
	uint32_t	bs_intval;		/* beacon interval+flags */
#define	HAL_BEACON_PERIOD	0x0000ffff	/* beacon interval period */
#define	HAL_BEACON_ENA		0x00800000	/* beacon xmit enable */
#define	HAL_BEACON_RESET_TSF	0x01000000	/* clear TSF */
	uint32_t	bs_dtimperiod;
	uint16_t	bs_cfpperiod;		/* CFP period in TU */
	uint16_t	bs_cfpmaxduration;	/* max CFP duration in TU */
	uint32_t	bs_cfpnext;		/* next CFP in TU */
	uint16_t	bs_timoffset;		/* byte offset to TIM bitmap */
	uint16_t	bs_bmissthreshold;	/* beacon miss threshold */
	uint32_t	bs_sleepduration;	/* max sleep duration */
} HAL_BEACON_STATE;

/*
 * Like HAL_BEACON_STATE but for non-station mode setup.
 * NB: see above flag definitions for bt_intval.
 */
typedef struct {
	uint32_t	bt_intval;		/* beacon interval+flags */
	uint32_t	bt_nexttbtt;		/* next beacon in TU */
	uint32_t	bt_nextatim;		/* next ATIM in TU */
	uint32_t	bt_nextdba;		/* next DBA in 1/8th TU */
	uint32_t	bt_nextswba;		/* next SWBA in 1/8th TU */
	uint32_t	bt_flags;		/* timer enables */
#define HAL_BEACON_TBTT_EN	0x00000001
#define HAL_BEACON_DBA_EN	0x00000002
#define HAL_BEACON_SWBA_EN	0x00000004
} HAL_BEACON_TIMERS;

/*
 * Per-node statistics maintained by the driver for use in
 * optimizing signal quality and other operational aspects.
 */
typedef struct {
	uint32_t	ns_avgbrssi;	/* average beacon rssi */
	uint32_t	ns_avgrssi;	/* average data rssi */
	uint32_t	ns_avgtxrssi;	/* average tx rssi */
} HAL_NODE_STATS;

#define	HAL_RSSI_EP_MULTIPLIER	(1<<7)	/* pow2 to optimize out * and / */

struct ath_desc;
struct ath_tx_status;
struct ath_rx_status;

/*
 * 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.  Note that before using the
 * reference returned by ath_hal_attach the caller should verify the
 * ABI version number.
 */
struct ath_hal {
	uint32_t	ah_magic;	/* consistency check magic number */
	uint32_t	ah_abi;		/* HAL ABI version */
#define	HAL_ABI_VERSION	0x08112800	/* YYMMDDnn */
	uint16_t	ah_devid;	/* PCI device ID */
	uint16_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;

	uint32_t	ah_macVersion;	/* MAC version id */
	uint16_t	ah_macRev;	/* MAC revision */
	uint16_t	ah_phyRev;	/* PHY revision */
	/* NB: when only one radio is present the rev is in 5Ghz */
	uint16_t	ah_analog5GhzRev;/* 5GHz radio revision */
	uint16_t	ah_analog2GhzRev;/* 2GHz radio revision */

	const HAL_RATE_TABLE *__ahdecl(*ah_getRateTable)(struct ath_hal *,
				u_int mode);
	void	  __ahdecl(*ah_detach)(struct ath_hal*);

	/* Reset functions */
	HAL_BOOL  __ahdecl(*ah_reset)(struct ath_hal *, HAL_OPMODE,
				HAL_CHANNEL *, HAL_BOOL bChannelChange,
				HAL_STATUS *status);
	HAL_BOOL  __ahdecl(*ah_phyDisable)(struct ath_hal *);
	HAL_BOOL  __ahdecl(*ah_disable)(struct ath_hal *);
	void	  __ahdecl(*ah_configPCIE)(struct ath_hal *, HAL_BOOL restore);
	void	  __ahdecl(*ah_disablePCIE)(struct ath_hal *);
	void	  __ahdecl(*ah_setPCUConfig)(struct ath_hal *);
	HAL_BOOL  __ahdecl(*ah_perCalibration)(struct ath_hal*, HAL_CHANNEL *,
			HAL_BOOL *);
	HAL_BOOL  __ahdecl(*ah_perCalibrationN)(struct ath_hal *, HAL_CHANNEL *,
			u_int chainMask, HAL_BOOL longCal, HAL_BOOL *isCalDone);
	HAL_BOOL  __ahdecl(*ah_resetCalValid)(struct ath_hal *, HAL_CHANNEL *);
	HAL_BOOL  __ahdecl(*ah_setTxPower)(struct ath_hal *,
			HAL_CHANNEL *, uint16_t *);
	HAL_BOOL  __ahdecl(*ah_setTxPowerLimit)(struct ath_hal *, uint32_t);
	HAL_BOOL  __ahdecl(*ah_setBoardValues)(struct ath_hal *,
			HAL_CHANNEL *);

	/* Transmit functions */
	HAL_BOOL  __ahdecl(*ah_updateTxTrigLevel)(struct ath_hal*,
				HAL_BOOL incTrigLevel);
	int	  __ahdecl(*ah_setupTxQueue)(struct ath_hal *, HAL_TX_QUEUE,
				const HAL_TXQ_INFO *qInfo);
	HAL_BOOL  __ahdecl(*ah_setTxQueueProps)(struct ath_hal *, int q,
				const HAL_TXQ_INFO *qInfo);
	HAL_BOOL  __ahdecl(*ah_getTxQueueProps)(struct ath_hal *, int q,
				HAL_TXQ_INFO *qInfo);
	HAL_BOOL  __ahdecl(*ah_releaseTxQueue)(struct ath_hal *ah, u_int q);
	HAL_BOOL  __ahdecl(*ah_resetTxQueue)(struct ath_hal *ah, u_int q);
	uint32_t __ahdecl(*ah_getTxDP)(struct ath_hal*, u_int);
	HAL_BOOL  __ahdecl(*ah_setTxDP)(struct ath_hal*, u_int, uint32_t txdp);
	uint32_t __ahdecl(*ah_numTxPending)(struct ath_hal *, u_int q);
	HAL_BOOL  __ahdecl(*ah_startTxDma)(struct ath_hal*, u_int);
	HAL_BOOL  __ahdecl(*ah_stopTxDma)(struct ath_hal*, u_int);
	HAL_BOOL  __ahdecl(*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,
				u_int compicvLen, u_int compivLen,
				u_int comp);
	HAL_BOOL  __ahdecl(*ah_setupXTxDesc)(struct ath_hal *, struct ath_desc*,
				u_int txRate1, u_int txTries1,
				u_int txRate2, u_int txTries2,
				u_int txRate3, u_int txTries3);
	HAL_BOOL  __ahdecl(*ah_fillTxDesc)(struct ath_hal *, struct ath_desc *,
				u_int segLen, HAL_BOOL firstSeg,
				HAL_BOOL lastSeg, const struct ath_desc *);
	HAL_STATUS __ahdecl(*ah_procTxDesc)(struct ath_hal *,
				struct ath_desc *, struct ath_tx_status *);
	void	   __ahdecl(*ah_getTxIntrQueue)(struct ath_hal *, uint32_t *);
	void	   __ahdecl(*ah_reqTxIntrDesc)(struct ath_hal *, struct ath_desc*);

	/* Receive Functions */
	uint32_t __ahdecl(*ah_getRxDP)(struct ath_hal*);
	void	  __ahdecl(*ah_setRxDP)(struct ath_hal*, uint32_t rxdp);
	void	  __ahdecl(*ah_enableReceive)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_stopDmaReceive)(struct ath_hal*);
	void	  __ahdecl(*ah_startPcuReceive)(struct ath_hal*);
	void	  __ahdecl(*ah_stopPcuReceive)(struct ath_hal*);
	void	  __ahdecl(*ah_setMulticastFilter)(struct ath_hal*,
				uint32_t filter0, uint32_t filter1);
	HAL_BOOL  __ahdecl(*ah_setMulticastFilterIndex)(struct ath_hal*,
				uint32_t index);
	HAL_BOOL  __ahdecl(*ah_clrMulticastFilterIndex)(struct ath_hal*,
				uint32_t index);
	uint32_t __ahdecl(*ah_getRxFilter)(struct ath_hal*);
	void	  __ahdecl(*ah_setRxFilter)(struct ath_hal*, uint32_t);
	HAL_BOOL  __ahdecl(*ah_setupRxDesc)(struct ath_hal *, struct ath_desc *,
				uint32_t size, u_int flags);
	HAL_STATUS __ahdecl(*ah_procRxDesc)(struct ath_hal *,
				struct ath_desc *, uint32_t phyAddr,
				struct ath_desc *next, uint64_t tsf,
				struct ath_rx_status *);
	void	  __ahdecl(*ah_rxMonitor)(struct ath_hal *,
				const HAL_NODE_STATS *, HAL_CHANNEL *);
	void	  __ahdecl(*ah_procMibEvent)(struct ath_hal *,
				const HAL_NODE_STATS *);

	/* Misc Functions */
	HAL_STATUS __ahdecl(*ah_getCapability)(struct ath_hal *,
				HAL_CAPABILITY_TYPE, uint32_t capability,
				uint32_t *result);
	HAL_BOOL   __ahdecl(*ah_setCapability)(struct ath_hal *,
				HAL_CAPABILITY_TYPE, uint32_t capability,
				uint32_t setting, HAL_STATUS *);
	HAL_BOOL   __ahdecl(*ah_getDiagState)(struct ath_hal *, int request,
				const void *args, uint32_t argsize,
				void **result, uint32_t *resultsize);
	void	  __ahdecl(*ah_getMacAddress)(struct ath_hal *, uint8_t *);
	HAL_BOOL  __ahdecl(*ah_setMacAddress)(struct ath_hal *, const uint8_t*);
	void	  __ahdecl(*ah_getBssIdMask)(struct ath_hal *, uint8_t *);
	HAL_BOOL  __ahdecl(*ah_setBssIdMask)(struct ath_hal *, const uint8_t*);
	HAL_BOOL  __ahdecl(*ah_setRegulatoryDomain)(struct ath_hal*,
				uint16_t, HAL_STATUS *);
	void	  __ahdecl(*ah_setLedState)(struct ath_hal*, HAL_LED_STATE);
	void	  __ahdecl(*ah_writeAssocid)(struct ath_hal*,
				const uint8_t *bssid, uint16_t assocId);
	HAL_BOOL  __ahdecl(*ah_gpioCfgOutput)(struct ath_hal *, uint32_t gpio);
	HAL_BOOL  __ahdecl(*ah_gpioCfgInput)(struct ath_hal *, uint32_t gpio);
	uint32_t __ahdecl(*ah_gpioGet)(struct ath_hal *, uint32_t gpio);
	HAL_BOOL  __ahdecl(*ah_gpioSet)(struct ath_hal *,
				uint32_t gpio, uint32_t val);
	void	  __ahdecl(*ah_gpioSetIntr)(struct ath_hal*, u_int, uint32_t);
	uint32_t __ahdecl(*ah_getTsf32)(struct ath_hal*);
	uint64_t __ahdecl(*ah_getTsf64)(struct ath_hal*);
	void	  __ahdecl(*ah_resetTsf)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_detectCardPresent)(struct ath_hal*);
	void	  __ahdecl(*ah_updateMibCounters)(struct ath_hal*,
				HAL_MIB_STATS*);
	HAL_RFGAIN __ahdecl(*ah_getRfGain)(struct ath_hal*);
	u_int	  __ahdecl(*ah_getDefAntenna)(struct ath_hal*);
	void	  __ahdecl(*ah_setDefAntenna)(struct ath_hal*, u_int);
	HAL_ANT_SETTING	 __ahdecl(*ah_getAntennaSwitch)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_setAntennaSwitch)(struct ath_hal*,
				HAL_ANT_SETTING);
	HAL_BOOL  __ahdecl(*ah_setSifsTime)(struct ath_hal*, u_int);
	u_int	  __ahdecl(*ah_getSifsTime)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_setSlotTime)(struct ath_hal*, u_int);
	u_int	  __ahdecl(*ah_getSlotTime)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_setAckTimeout)(struct ath_hal*, u_int);
	u_int	  __ahdecl(*ah_getAckTimeout)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_setAckCTSRate)(struct ath_hal*, u_int);
	u_int	  __ahdecl(*ah_getAckCTSRate)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_setCTSTimeout)(struct ath_hal*, u_int);
	u_int	  __ahdecl(*ah_getCTSTimeout)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_setDecompMask)(struct ath_hal*, uint16_t, int);
	void	  __ahdecl(*ah_setCoverageClass)(struct ath_hal*, uint8_t, int);

	/* Key Cache Functions */
	uint32_t __ahdecl(*ah_getKeyCacheSize)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_resetKeyCacheEntry)(struct ath_hal*, uint16_t);
	HAL_BOOL  __ahdecl(*ah_isKeyCacheEntryValid)(struct ath_hal *,
				uint16_t);
	HAL_BOOL  __ahdecl(*ah_setKeyCacheEntry)(struct ath_hal*,
				uint16_t, const HAL_KEYVAL *,
				const uint8_t *, int);
	HAL_BOOL  __ahdecl(*ah_setKeyCacheEntryMac)(struct ath_hal*,
				uint16_t, const uint8_t *);

	/* Power Management Functions */
	HAL_BOOL  __ahdecl(*ah_setPowerMode)(struct ath_hal*,
				HAL_POWER_MODE mode, int setChip);
	HAL_POWER_MODE __ahdecl(*ah_getPowerMode)(struct ath_hal*);
	int16_t   __ahdecl(*ah_getChanNoise)(struct ath_hal *, HAL_CHANNEL *);

	/* Beacon Management Functions */
	void	  __ahdecl(*ah_setBeaconTimers)(struct ath_hal*,
				const HAL_BEACON_TIMERS *);
	/* NB: deprecated, use ah_setBeaconTimers instead */
	void	  __ahdecl(*ah_beaconInit)(struct ath_hal *,
				uint32_t nexttbtt, uint32_t intval);
	void	  __ahdecl(*ah_setStationBeaconTimers)(struct ath_hal*,
				const HAL_BEACON_STATE *);
	void	  __ahdecl(*ah_resetStationBeaconTimers)(struct ath_hal*);

	/* Interrupt functions */
	HAL_BOOL  __ahdecl(*ah_isInterruptPending)(struct ath_hal*);
	HAL_BOOL  __ahdecl(*ah_getPendingInterrupts)(struct ath_hal*, HAL_INT*);
	HAL_INT	  __ahdecl(*ah_getInterrupts)(struct ath_hal*);
	HAL_INT	  __ahdecl(*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 *__ahdecl ath_hal_probe(uint16_t vendorid, uint16_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 * __ahdecl ath_hal_attach(uint16_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 __ahdecl ath_hal_init_channels(struct ath_hal *,
		HAL_CHANNEL *chans, u_int maxchans, u_int *nchans,
		uint8_t *regclassids, u_int maxregids, u_int *nregids,
		HAL_CTRY_CODE cc, u_int modeSelect,
		HAL_BOOL enableOutdoor, HAL_BOOL enableExtendedChannels);

/*
 * Calibrate noise floor data following a channel scan or similar.
 * This must be called prior retrieving noise floor data.
 */
extern	void __ahdecl ath_hal_process_noisefloor(struct ath_hal *ah);

/*
 * Return bit mask of wireless modes supported by the hardware.
 */
extern	u_int __ahdecl ath_hal_getwirelessmodes(struct ath_hal*, HAL_CTRY_CODE);

/*
 * Calculate the transmit duration of a frame.
 */
extern uint16_t __ahdecl ath_hal_computetxtime(struct ath_hal *,
		const HAL_RATE_TABLE *rates, uint32_t frameLen,
		uint16_t rateix, HAL_BOOL shortPreamble);

/*
 * Return if device is public safety.
 */
extern HAL_BOOL __ahdecl ath_hal_ispublicsafetysku(struct ath_hal *);

/*
 * Return if device is operating in 900 MHz band.
 */
extern HAL_BOOL ath_hal_isgsmsku(struct ath_hal *);

/*
 * Convert between IEEE channel number and channel frequency
 * using the specified channel flags; e.g. CHANNEL_2GHZ.
 */
extern	int __ahdecl ath_hal_mhz2ieee(struct ath_hal *, u_int mhz, u_int flags);
#endif /* _ATH_AH_H_ */