drivers/net/wireless/iwlwifi/iwl-4965-rs.h - linux - Git at Google

 /******************************************************************************
  *
  * Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of version 2 of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  *
  * The full GNU General Public License is included in this distribution in the
  * file called LICENSE.
  *
  * Contact Information:
  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  *****************************************************************************/

 #ifndef __iwl_4965_rs_h__
 #define __iwl_4965_rs_h__

 #include "iwl-4965.h"

 struct iwl4965_rate_info {
 	u8 plcp;	/* uCode API:  IWL_RATE_6M_PLCP, etc. */
 	u8 plcp_siso;	/* uCode API:  IWL_RATE_SISO_6M_PLCP, etc. */
 	u8 plcp_mimo;	/* uCode API:  IWL_RATE_MIMO_6M_PLCP, etc. */
 	u8 ieee;	/* MAC header:  IWL_RATE_6M_IEEE, etc. */
 	u8 prev_ieee;    /* previous rate in IEEE speeds */
 	u8 next_ieee;    /* next rate in IEEE speeds */
 	u8 prev_rs;      /* previous rate used in rs algo */
 	u8 next_rs;      /* next rate used in rs algo */
 	u8 prev_rs_tgg;  /* previous rate used in TGG rs algo */
 	u8 next_rs_tgg;  /* next rate used in TGG rs algo */
 };

 /*
  * These serve as indexes into
  * struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT];
  */
 enum {
 	IWL_RATE_1M_INDEX = 0,
 	IWL_RATE_2M_INDEX,
 	IWL_RATE_5M_INDEX,
 	IWL_RATE_11M_INDEX,
 	IWL_RATE_6M_INDEX,
 	IWL_RATE_9M_INDEX,
 	IWL_RATE_12M_INDEX,
 	IWL_RATE_18M_INDEX,
 	IWL_RATE_24M_INDEX,
 	IWL_RATE_36M_INDEX,
 	IWL_RATE_48M_INDEX,
 	IWL_RATE_54M_INDEX,
 	IWL_RATE_60M_INDEX,
 	IWL_RATE_COUNT,
 	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
 	IWL_RATE_INVALID = IWL_RATE_INVM_INDEX
 };

 enum {
 	IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
 	IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
 	IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
 	IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
 };

 /* #define vs. enum to keep from defaulting to 'large integer' */
 #define	IWL_RATE_6M_MASK   (1<<IWL_RATE_6M_INDEX)
 #define	IWL_RATE_9M_MASK   (1<<IWL_RATE_9M_INDEX)
 #define	IWL_RATE_12M_MASK  (1<<IWL_RATE_12M_INDEX)
 #define	IWL_RATE_18M_MASK  (1<<IWL_RATE_18M_INDEX)
 #define	IWL_RATE_24M_MASK  (1<<IWL_RATE_24M_INDEX)
 #define	IWL_RATE_36M_MASK  (1<<IWL_RATE_36M_INDEX)
 #define	IWL_RATE_48M_MASK  (1<<IWL_RATE_48M_INDEX)
 #define	IWL_RATE_54M_MASK  (1<<IWL_RATE_54M_INDEX)
 #define IWL_RATE_60M_MASK  (1<<IWL_RATE_60M_INDEX)
 #define	IWL_RATE_1M_MASK   (1<<IWL_RATE_1M_INDEX)
 #define	IWL_RATE_2M_MASK   (1<<IWL_RATE_2M_INDEX)
 #define	IWL_RATE_5M_MASK   (1<<IWL_RATE_5M_INDEX)
 #define	IWL_RATE_11M_MASK  (1<<IWL_RATE_11M_INDEX)

 /* 4965 uCode API values for legacy bit rates, both OFDM and CCK */
 enum {
 	IWL_RATE_6M_PLCP  = 13,
 	IWL_RATE_9M_PLCP  = 15,
 	IWL_RATE_12M_PLCP = 5,
 	IWL_RATE_18M_PLCP = 7,
 	IWL_RATE_24M_PLCP = 9,
 	IWL_RATE_36M_PLCP = 11,
 	IWL_RATE_48M_PLCP = 1,
 	IWL_RATE_54M_PLCP = 3,
 	IWL_RATE_60M_PLCP = 3,
 	IWL_RATE_1M_PLCP  = 10,
 	IWL_RATE_2M_PLCP  = 20,
 	IWL_RATE_5M_PLCP  = 55,
 	IWL_RATE_11M_PLCP = 110,
 };

 /* 4965 uCode API values for OFDM high-throughput (HT) bit rates */
 enum {
 	IWL_RATE_SISO_6M_PLCP = 0,
 	IWL_RATE_SISO_12M_PLCP = 1,
 	IWL_RATE_SISO_18M_PLCP = 2,
 	IWL_RATE_SISO_24M_PLCP = 3,
 	IWL_RATE_SISO_36M_PLCP = 4,
 	IWL_RATE_SISO_48M_PLCP = 5,
 	IWL_RATE_SISO_54M_PLCP = 6,
 	IWL_RATE_SISO_60M_PLCP = 7,
 	IWL_RATE_MIMO_6M_PLCP  = 0x8,
 	IWL_RATE_MIMO_12M_PLCP = 0x9,
 	IWL_RATE_MIMO_18M_PLCP = 0xa,
 	IWL_RATE_MIMO_24M_PLCP = 0xb,
 	IWL_RATE_MIMO_36M_PLCP = 0xc,
 	IWL_RATE_MIMO_48M_PLCP = 0xd,
 	IWL_RATE_MIMO_54M_PLCP = 0xe,
 	IWL_RATE_MIMO_60M_PLCP = 0xf,
 	IWL_RATE_SISO_INVM_PLCP,
 	IWL_RATE_MIMO_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
 };

 /* MAC header values for bit rates */
 enum {
 	IWL_RATE_6M_IEEE  = 12,
 	IWL_RATE_9M_IEEE  = 18,
 	IWL_RATE_12M_IEEE = 24,
 	IWL_RATE_18M_IEEE = 36,
 	IWL_RATE_24M_IEEE = 48,
 	IWL_RATE_36M_IEEE = 72,
 	IWL_RATE_48M_IEEE = 96,
 	IWL_RATE_54M_IEEE = 108,
 	IWL_RATE_60M_IEEE = 120,
 	IWL_RATE_1M_IEEE  = 2,
 	IWL_RATE_2M_IEEE  = 4,
 	IWL_RATE_5M_IEEE  = 11,
 	IWL_RATE_11M_IEEE = 22,
 };

 #define IWL_CCK_BASIC_RATES_MASK    \
        (IWL_RATE_1M_MASK          | \
 	IWL_RATE_2M_MASK)

 #define IWL_CCK_RATES_MASK          \
        (IWL_BASIC_RATES_MASK      | \
 	IWL_RATE_5M_MASK          | \
 	IWL_RATE_11M_MASK)

 #define IWL_OFDM_BASIC_RATES_MASK   \
 	(IWL_RATE_6M_MASK         | \
 	IWL_RATE_12M_MASK         | \
 	IWL_RATE_24M_MASK)

 #define IWL_OFDM_RATES_MASK         \
        (IWL_OFDM_BASIC_RATES_MASK | \
 	IWL_RATE_9M_MASK          | \
 	IWL_RATE_18M_MASK         | \
 	IWL_RATE_36M_MASK         | \
 	IWL_RATE_48M_MASK         | \
 	IWL_RATE_54M_MASK)

 #define IWL_BASIC_RATES_MASK         \
 	(IWL_OFDM_BASIC_RATES_MASK | \
 	 IWL_CCK_BASIC_RATES_MASK)

 #define IWL_RATES_MASK ((1<<IWL_RATE_COUNT)-1)

 #define IWL_INVALID_VALUE    -1

 #define IWL_MIN_RSSI_VAL                 -100
 #define IWL_MAX_RSSI_VAL                    0

 /* These values specify how many Tx frame attempts before
  * searching for a new modulation mode */
 #define IWL_LEGACY_FAILURE_LIMIT	160
 #define IWL_LEGACY_SUCCESS_LIMIT	480
 #define IWL_LEGACY_TABLE_COUNT		160

 #define IWL_NONE_LEGACY_FAILURE_LIMIT	400
 #define IWL_NONE_LEGACY_SUCCESS_LIMIT	4500
 #define IWL_NONE_LEGACY_TABLE_COUNT	1500

 /* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
 #define IWL_RS_GOOD_RATIO		12800	/* 100% */
 #define IWL_RATE_SCALE_SWITCH		10880	/*  85% */
 #define IWL_RATE_HIGH_TH		10880	/*  85% */
 #define IWL_RATE_INCREASE_TH            8960	/*  70% */
 #define IWL_RATE_DECREASE_TH		1920	/*  15% */

 /* possible actions when in legacy mode */
 #define IWL_LEGACY_SWITCH_ANTENNA	0
 #define IWL_LEGACY_SWITCH_SISO		1
 #define IWL_LEGACY_SWITCH_MIMO	        2

 /* possible actions when in siso mode */
 #define IWL_SISO_SWITCH_ANTENNA		0
 #define IWL_SISO_SWITCH_MIMO		1
 #define IWL_SISO_SWITCH_GI		2

 /* possible actions when in mimo mode */
 #define IWL_MIMO_SWITCH_ANTENNA_A	0
 #define IWL_MIMO_SWITCH_ANTENNA_B	1
 #define IWL_MIMO_SWITCH_GI		2

 #define IWL_ACTION_LIMIT		3	/* # possible actions */

 #define LQ_SIZE		2	/* 2 mode tables:  "Active" and "Search" */

 extern const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT];

 enum iwl4965_table_type {
 	LQ_NONE,
 	LQ_G,		/* legacy types */
 	LQ_A,
 	LQ_SISO,	/* high-throughput types */
 	LQ_MIMO,
 	LQ_MAX,
 };

 #define is_legacy(tbl) (((tbl) == LQ_G) || ((tbl) == LQ_A))
 #define is_siso(tbl) (((tbl) == LQ_SISO))
 #define is_mimo(tbl) (((tbl) == LQ_MIMO))
 #define is_Ht(tbl) (is_siso(tbl) || is_mimo(tbl))
 #define is_a_band(tbl) (((tbl) == LQ_A))
 #define is_g_and(tbl) (((tbl) == LQ_G))

 /* 4965 has 2 antennas/chains for Tx (but 3 for Rx) */
 enum iwl4965_antenna_type {
 	ANT_NONE,
 	ANT_MAIN,
 	ANT_AUX,
 	ANT_BOTH,
 };

 static inline u8 iwl4965_get_prev_ieee_rate(u8 rate_index)
 {
 	u8 rate = iwl4965_rates[rate_index].prev_ieee;

 	if (rate == IWL_RATE_INVALID)
 		rate = rate_index;
 	return rate;
 }

 extern int iwl4965_rate_index_from_plcp(int plcp);

 /**
  * iwl4965_fill_rs_info - Fill an output text buffer with the rate representation
  *
  * NOTE:  This is provided as a quick mechanism for a user to visualize
  * the performance of the rate control algorithm and is not meant to be
  * parsed software.
  */
 extern int iwl4965_fill_rs_info(struct ieee80211_hw *, char *buf, u8 sta_id);

 /**
  * iwl4965_rate_scale_init - Initialize the rate scale table based on assoc info
  *
  * The specific throughput table used is based on the type of network
  * the associated with, including A, B, G, and G w/ TGG protection
  */
 extern void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id);

 /**
  * iwl4965_rate_control_register - Register the rate control algorithm callbacks
  *
  * Since the rate control algorithm is hardware specific, there is no need
  * or reason to place it as a stand alone module.  The driver can call
  * iwl4965_rate_control_register in order to register the rate control callbacks
  * with the mac80211 subsystem.  This should be performed prior to calling
  * ieee80211_register_hw
  *
  */
 extern void iwl4965_rate_control_register(struct ieee80211_hw *hw);

 /**
  * iwl4965_rate_control_unregister - Unregister the rate control callbacks
  *
  * This should be called after calling ieee80211_unregister_hw, but before
  * the driver is unloaded.
  */
 extern void iwl4965_rate_control_unregister(struct ieee80211_hw *hw);

 #endif
	/******************************************************************************
	*
	* Copyright(c) 2003 - 2007 Intel Corporation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of version 2 of the GNU General Public License as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
	*
	* The full GNU General Public License is included in this distribution in the
	* file called LICENSE.
	*
	* Contact Information:
	* James P. Ketrenos <ipw2100-admin@linux.intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	*****************************************************************************/

	#ifndef __iwl_4965_rs_h__
	#define __iwl_4965_rs_h__

	#include "iwl-4965.h"

	struct iwl4965_rate_info {
	u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
	u8 plcp_siso; /* uCode API: IWL_RATE_SISO_6M_PLCP, etc. */
	u8 plcp_mimo; /* uCode API: IWL_RATE_MIMO_6M_PLCP, etc. */
	u8 ieee; /* MAC header: IWL_RATE_6M_IEEE, etc. */
	u8 prev_ieee; /* previous rate in IEEE speeds */
	u8 next_ieee; /* next rate in IEEE speeds */
	u8 prev_rs; /* previous rate used in rs algo */
	u8 next_rs; /* next rate used in rs algo */
	u8 prev_rs_tgg; /* previous rate used in TGG rs algo */
	u8 next_rs_tgg; /* next rate used in TGG rs algo */
	};

	/*
	* These serve as indexes into
	* struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT];
	*/
	enum {
	IWL_RATE_1M_INDEX = 0,
	IWL_RATE_2M_INDEX,
	IWL_RATE_5M_INDEX,
	IWL_RATE_11M_INDEX,
	IWL_RATE_6M_INDEX,
	IWL_RATE_9M_INDEX,
	IWL_RATE_12M_INDEX,
	IWL_RATE_18M_INDEX,
	IWL_RATE_24M_INDEX,
	IWL_RATE_36M_INDEX,
	IWL_RATE_48M_INDEX,
	IWL_RATE_54M_INDEX,
	IWL_RATE_60M_INDEX,
	IWL_RATE_COUNT,
	IWL_RATE_INVM_INDEX = IWL_RATE_COUNT,
	IWL_RATE_INVALID = IWL_RATE_INVM_INDEX
	};

	enum {
	IWL_FIRST_OFDM_RATE = IWL_RATE_6M_INDEX,
	IWL_LAST_OFDM_RATE = IWL_RATE_60M_INDEX,
	IWL_FIRST_CCK_RATE = IWL_RATE_1M_INDEX,
	IWL_LAST_CCK_RATE = IWL_RATE_11M_INDEX,
	};

	/* #define vs. enum to keep from defaulting to 'large integer' */
	#define IWL_RATE_6M_MASK (1<<IWL_RATE_6M_INDEX)
	#define IWL_RATE_9M_MASK (1<<IWL_RATE_9M_INDEX)
	#define IWL_RATE_12M_MASK (1<<IWL_RATE_12M_INDEX)
	#define IWL_RATE_18M_MASK (1<<IWL_RATE_18M_INDEX)
	#define IWL_RATE_24M_MASK (1<<IWL_RATE_24M_INDEX)
	#define IWL_RATE_36M_MASK (1<<IWL_RATE_36M_INDEX)
	#define IWL_RATE_48M_MASK (1<<IWL_RATE_48M_INDEX)
	#define IWL_RATE_54M_MASK (1<<IWL_RATE_54M_INDEX)
	#define IWL_RATE_60M_MASK (1<<IWL_RATE_60M_INDEX)
	#define IWL_RATE_1M_MASK (1<<IWL_RATE_1M_INDEX)
	#define IWL_RATE_2M_MASK (1<<IWL_RATE_2M_INDEX)
	#define IWL_RATE_5M_MASK (1<<IWL_RATE_5M_INDEX)
	#define IWL_RATE_11M_MASK (1<<IWL_RATE_11M_INDEX)

	/* 4965 uCode API values for legacy bit rates, both OFDM and CCK */
	enum {
	IWL_RATE_6M_PLCP = 13,
	IWL_RATE_9M_PLCP = 15,
	IWL_RATE_12M_PLCP = 5,
	IWL_RATE_18M_PLCP = 7,
	IWL_RATE_24M_PLCP = 9,
	IWL_RATE_36M_PLCP = 11,
	IWL_RATE_48M_PLCP = 1,
	IWL_RATE_54M_PLCP = 3,
	IWL_RATE_60M_PLCP = 3,
	IWL_RATE_1M_PLCP = 10,
	IWL_RATE_2M_PLCP = 20,
	IWL_RATE_5M_PLCP = 55,
	IWL_RATE_11M_PLCP = 110,
	};

	/* 4965 uCode API values for OFDM high-throughput (HT) bit rates */
	enum {
	IWL_RATE_SISO_6M_PLCP = 0,
	IWL_RATE_SISO_12M_PLCP = 1,
	IWL_RATE_SISO_18M_PLCP = 2,
	IWL_RATE_SISO_24M_PLCP = 3,
	IWL_RATE_SISO_36M_PLCP = 4,
	IWL_RATE_SISO_48M_PLCP = 5,
	IWL_RATE_SISO_54M_PLCP = 6,
	IWL_RATE_SISO_60M_PLCP = 7,
	IWL_RATE_MIMO_6M_PLCP = 0x8,
	IWL_RATE_MIMO_12M_PLCP = 0x9,
	IWL_RATE_MIMO_18M_PLCP = 0xa,
	IWL_RATE_MIMO_24M_PLCP = 0xb,
	IWL_RATE_MIMO_36M_PLCP = 0xc,
	IWL_RATE_MIMO_48M_PLCP = 0xd,
	IWL_RATE_MIMO_54M_PLCP = 0xe,
	IWL_RATE_MIMO_60M_PLCP = 0xf,
	IWL_RATE_SISO_INVM_PLCP,
	IWL_RATE_MIMO_INVM_PLCP = IWL_RATE_SISO_INVM_PLCP,
	};

	/* MAC header values for bit rates */
	enum {
	IWL_RATE_6M_IEEE = 12,
	IWL_RATE_9M_IEEE = 18,
	IWL_RATE_12M_IEEE = 24,
	IWL_RATE_18M_IEEE = 36,
	IWL_RATE_24M_IEEE = 48,
	IWL_RATE_36M_IEEE = 72,
	IWL_RATE_48M_IEEE = 96,
	IWL_RATE_54M_IEEE = 108,
	IWL_RATE_60M_IEEE = 120,
	IWL_RATE_1M_IEEE = 2,
	IWL_RATE_2M_IEEE = 4,
	IWL_RATE_5M_IEEE = 11,
	IWL_RATE_11M_IEEE = 22,
	};

	#define IWL_CCK_BASIC_RATES_MASK \
	(IWL_RATE_1M_MASK \| \
	IWL_RATE_2M_MASK)

	#define IWL_CCK_RATES_MASK \
	(IWL_BASIC_RATES_MASK \| \
	IWL_RATE_5M_MASK \| \
	IWL_RATE_11M_MASK)

	#define IWL_OFDM_BASIC_RATES_MASK \
	(IWL_RATE_6M_MASK \| \
	IWL_RATE_12M_MASK \| \
	IWL_RATE_24M_MASK)

	#define IWL_OFDM_RATES_MASK \
	(IWL_OFDM_BASIC_RATES_MASK \| \
	IWL_RATE_9M_MASK \| \
	IWL_RATE_18M_MASK \| \
	IWL_RATE_36M_MASK \| \
	IWL_RATE_48M_MASK \| \
	IWL_RATE_54M_MASK)

	#define IWL_BASIC_RATES_MASK \
	(IWL_OFDM_BASIC_RATES_MASK \| \
	IWL_CCK_BASIC_RATES_MASK)

	#define IWL_RATES_MASK ((1<<IWL_RATE_COUNT)-1)

	#define IWL_INVALID_VALUE -1

	#define IWL_MIN_RSSI_VAL -100
	#define IWL_MAX_RSSI_VAL 0

	/* These values specify how many Tx frame attempts before
	* searching for a new modulation mode */
	#define IWL_LEGACY_FAILURE_LIMIT 160
	#define IWL_LEGACY_SUCCESS_LIMIT 480
	#define IWL_LEGACY_TABLE_COUNT 160

	#define IWL_NONE_LEGACY_FAILURE_LIMIT 400
	#define IWL_NONE_LEGACY_SUCCESS_LIMIT 4500
	#define IWL_NONE_LEGACY_TABLE_COUNT 1500

	/* Success ratio (ACKed / attempted tx frames) values (perfect is 128 * 100) */
	#define IWL_RS_GOOD_RATIO 12800 /* 100% */
	#define IWL_RATE_SCALE_SWITCH 10880 /* 85% */
	#define IWL_RATE_HIGH_TH 10880 /* 85% */
	#define IWL_RATE_INCREASE_TH 8960 /* 70% */
	#define IWL_RATE_DECREASE_TH 1920 /* 15% */

	/* possible actions when in legacy mode */
	#define IWL_LEGACY_SWITCH_ANTENNA 0
	#define IWL_LEGACY_SWITCH_SISO 1
	#define IWL_LEGACY_SWITCH_MIMO 2

	/* possible actions when in siso mode */
	#define IWL_SISO_SWITCH_ANTENNA 0
	#define IWL_SISO_SWITCH_MIMO 1
	#define IWL_SISO_SWITCH_GI 2

	/* possible actions when in mimo mode */
	#define IWL_MIMO_SWITCH_ANTENNA_A 0
	#define IWL_MIMO_SWITCH_ANTENNA_B 1
	#define IWL_MIMO_SWITCH_GI 2

	#define IWL_ACTION_LIMIT 3 /* # possible actions */

	#define LQ_SIZE 2 /* 2 mode tables: "Active" and "Search" */

	extern const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT];

	enum iwl4965_table_type {
	LQ_NONE,
	LQ_G, /* legacy types */
	LQ_A,
	LQ_SISO, /* high-throughput types */
	LQ_MIMO,
	LQ_MAX,
	};

	#define is_legacy(tbl) (((tbl) == LQ_G) \|\| ((tbl) == LQ_A))
	#define is_siso(tbl) (((tbl) == LQ_SISO))
	#define is_mimo(tbl) (((tbl) == LQ_MIMO))
	#define is_Ht(tbl) (is_siso(tbl) \|\| is_mimo(tbl))
	#define is_a_band(tbl) (((tbl) == LQ_A))
	#define is_g_and(tbl) (((tbl) == LQ_G))

	/* 4965 has 2 antennas/chains for Tx (but 3 for Rx) */
	enum iwl4965_antenna_type {
	ANT_NONE,
	ANT_MAIN,
	ANT_AUX,
	ANT_BOTH,
	};

	static inline u8 iwl4965_get_prev_ieee_rate(u8 rate_index)
	{
	u8 rate = iwl4965_rates[rate_index].prev_ieee;

	if (rate == IWL_RATE_INVALID)
	rate = rate_index;
	return rate;
	}

	extern int iwl4965_rate_index_from_plcp(int plcp);

	/**
	* iwl4965_fill_rs_info - Fill an output text buffer with the rate representation
	*
	* NOTE: This is provided as a quick mechanism for a user to visualize
	* the performance of the rate control algorithm and is not meant to be
	* parsed software.
	*/
	extern int iwl4965_fill_rs_info(struct ieee80211_hw , char buf, u8 sta_id);

	/**
	* iwl4965_rate_scale_init - Initialize the rate scale table based on assoc info
	*
	* The specific throughput table used is based on the type of network
	* the associated with, including A, B, G, and G w/ TGG protection
	*/
	extern void iwl4965_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id);

	/**
	* iwl4965_rate_control_register - Register the rate control algorithm callbacks
	*
	* Since the rate control algorithm is hardware specific, there is no need
	* or reason to place it as a stand alone module. The driver can call
	* iwl4965_rate_control_register in order to register the rate control callbacks
	* with the mac80211 subsystem. This should be performed prior to calling
	* ieee80211_register_hw
	*
	*/
	extern void iwl4965_rate_control_register(struct ieee80211_hw *hw);

	/**
	* iwl4965_rate_control_unregister - Unregister the rate control callbacks
	*
	* This should be called after calling ieee80211_unregister_hw, but before
	* the driver is unloaded.
	*/
	extern void iwl4965_rate_control_unregister(struct ieee80211_hw *hw);

	#endif