text: /* SPDX-License-Identifier: GPL-2.0-or-later */
  /*
  	Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
  	Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
  	Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
  	<http://rt2x00.serialmonkey.com>
  
   */
  
  /*
  	Module: rt2x00
  	Abstract: rt2x00 global information.
   */
  
  #ifndef RT2X00_H
  #define RT2X00_H
  
  #include <linux/bitops.h>
  #include <linux/interrupt.h>
  #include <linux/skbuff.h>
  #include <linux/workqueue.h>
  #include <linux/firmware.h>
  #include <linux/leds.h>
  #include <linux/mutex.h>
  #include <linux/etherdevice.h>
  #include <linux/kfifo.h>
  #include <linux/hrtimer.h>
  #include <linux/average.h>
  #include <linux/usb.h>
  #include <linux/clk.h>
  
  #include <net/mac80211.h>
  
  #include "rt2x00debug.h"
  #include "rt2x00dump.h"
  #include "rt2x00leds.h"
  #include "rt2x00reg.h"
  #include "rt2x00queue.h"
  
  /*
   * Module information.
   */
  #define DRV_VERSION	"2.3.0"
  #define DRV_PROJECT	"http://rt2x00.serialmonkey.com"
  
  /* Debug definitions.
   * Debug output has to be enabled during compile time.
   */
  #ifdef CONFIG_RT2X00_DEBUG
  #define DEBUG
  #endif /* CONFIG_RT2X00_DEBUG */
  
  /* Utility printing macros
   * rt2x00_probe_err is for messages when rt2x00_dev is uninitialized
   */
  #define rt2x00_probe_err(fmt, ...)					\
  	printk(KERN_ERR KBUILD_MODNAME ": %s: Error - " fmt,		\
  	       __func__, ##__VA_ARGS__)
  #define rt2x00_err(dev, fmt, ...)					\
  	wiphy_err_ratelimited((dev)->hw->wiphy, "%s: Error - " fmt,	\
  		  __func__, ##__VA_ARGS__)
  #define rt2x00_warn(dev, fmt, ...)					\
  	wiphy_warn_ratelimited((dev)->hw->wiphy, "%s: Warning - " fmt,	\
  		   __func__, ##__VA_ARGS__)
  #define rt2x00_info(dev, fmt, ...)					\
  	wiphy_info((dev)->hw->wiphy, "%s: Info - " fmt,			\
  		   __func__, ##__VA_ARGS__)
  
  /* Various debug levels */
  #define rt2x00_dbg(dev, fmt, ...)					\
  	wiphy_dbg((dev)->hw->wiphy, "%s: Debug - " fmt,			\
  		  __func__, ##__VA_ARGS__)
  #define rt2x00_eeprom_dbg(dev, fmt, ...)				\
  	wiphy_dbg((dev)->hw->wiphy, "%s: EEPROM recovery - " fmt,	\
  		  __func__, ##__VA_ARGS__)
  
  /*
   * Duration calculations
   * The rate variable passed is: 100kbs.
   * To convert from bytes to bits we multiply size with 8,
   * then the size is multiplied with 10 to make the
   * real rate -> rate argument correction.
   */
  #define GET_DURATION(__size, __rate)	(((__size) * 8 * 10) / (__rate))
  #define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
  
  /*
   * Determine the number of L2 padding bytes required between the header and
   * the payload.
   */
  #define L2PAD_SIZE(__hdrlen)	(-(__hdrlen) & 3)
  
  /*
   * Determine the alignment requirement,
   * to make sure the 802.11 payload is padded to a 4-byte boundrary
   * we must determine the address of the payload and calculate the
   * amount of bytes needed to move the data.
   */
  #define ALIGN_SIZE(__skb, __header) \
  	(((unsigned long)((__skb)->data + (__header))) & 3)
  
  /*
   * Constants for extra TX headroom for alignment purposes.
   */
  #define RT2X00_ALIGN_SIZE	4 /* Only whole frame needs alignment */
  #define RT2X00_L2PAD_SIZE	8 /* Both header & payload need alignment */
  
  /*
   * Standard timing and size defines.
   * These values should follow the ieee80211 specifications.
   */
  #define ACK_SIZE		14
  #define IEEE80211_HEADER	24
  #define PLCP			48
  #define BEACON			100
  #define PREAMBLE		144
  #define SHORT_PREAMBLE		72
  #define SLOT_TIME		20
  #define SHORT_SLOT_TIME		9
  #define SIFS			10
  #define PIFS			(SIFS + SLOT_TIME)
  #define SHORT_PIFS		(SIFS + SHORT_SLOT_TIME)
  #define DIFS			(PIFS + SLOT_TIME)
  #define SHORT_DIFS		(SHORT_PIFS + SHORT_SLOT_TIME)
  #define EIFS			(SIFS + DIFS + \
  				  GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
  #define SHORT_EIFS		(SIFS + SHORT_DIFS + \
  				  GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
  
  enum rt2x00_chip_intf {
  	RT2X00_CHIP_INTF_PCI,
  	RT2X00_CHIP_INTF_PCIE,
  	RT2X00_CHIP_INTF_USB,
  	RT2X00_CHIP_INTF_SOC,
  };
  
  /*
   * Chipset identification
   * The chipset on the device is composed of a RT and RF chip.
   * The chipset combination is important for determining device capabilities.
   */
  struct rt2x00_chip {
  	u16 rt;
  #define RT2460		0x2460
  #define RT2560		0x2560
  #define RT2570		0x2570
  #define RT2661		0x2661
  #define RT2573		0x2573
  #define RT2860		0x2860	/* 2.4GHz */
  #define RT2872		0x2872	/* WSOC */
  #define RT2883		0x2883	/* WSOC */
  #define RT3070		0x3070
  #define RT3071		0x3071
  #define RT3090		0x3090	/* 2.4GHz PCIe */
  #define RT3290		0x3290
  #define RT3352		0x3352  /* WSOC */
  #define RT3390		0x3390
  #define RT3572		0x3572
  #define RT3593		0x3593
  #define RT3883		0x3883	/* WSOC */
  #define RT5350		0x5350  /* WSOC 2.4GHz */
  #define RT5390		0x5390  /* 2.4GHz */
  #define RT5392		0x5392  /* 2.4GHz */
  #define RT5592		0x5592
  #define RT6352		0x6352  /* WSOC 2.4GHz */
  
  	u16 rf;
  	u16 rev;
  
  	enum rt2x00_chip_intf intf;
  };
  
  /*
   * RF register values that belong to a particular channel.
   */
  struct rf_channel {
  	int channel;
  	u32 rf1;
  	u32 rf2;
  	u32 rf3;
  	u32 rf4;
  };
  
  /*
   * Channel information structure
   */
  struct channel_info {
  	unsigned int flags;
  #define GEOGRAPHY_ALLOWED	0x00000001
  
  	short max_power;
  	short default_power1;
  	short default_power2;
  	short default_power3;
  };
  
  /*
   * Antenna setup values.
   */
  struct antenna_setup {
  	enum antenna rx;
  	enum antenna tx;
  	u8 rx_chain_num;
  	u8 tx_chain_num;
  };
  
  /*
   * Quality statistics about the currently active link.
   */
  struct link_qual {
  	/*
  	 * Statistics required for Link tuning by driver
  	 * The rssi value is provided by rt2x00lib during the
  	 * link_tuner() callback function.
  	 * The false_cca field is filled during the link_stats()
  	 * callback function and could be used during the
  	 * link_tuner() callback function.
  	 */
  	int rssi;
  	int false_cca;
  
  	/*
  	 * VGC levels
  	 * Hardware driver will tune the VGC level during each call
  	 * to the link_tuner() callback function. This vgc_level is
  	 * is determined based on the link quality statistics like
  	 * average RSSI and the false CCA count.
  	 *
  	 * In some cases the drivers need to differentiate between
  	 * the currently "desired" VGC level and the level configured
  	 * in the hardware. The latter is important to reduce the
  	 * number of BBP register reads to reduce register access
  	 * overhead. For this reason we store both values here.
  	 */
  	u8 vgc_level;
  	u8 vgc_level_reg;
  
  	/*
  	 * Statistics required for Signal quality calculation.
  	 * These fields might be changed during the link_stats()
  	 * callback function.
  	 */
  	int rx_success;
  	int rx_failed;
  	int tx_success;
  	int tx_failed;
  };
  
  DECLARE_EWMA(rssi, 10, 8)
  
  /*
   * Antenna settings about the currently active link.
   */
  struct link_ant {
  	/*
  	 * Antenna flags
  	 */
  	unsigned int flags;
  #define ANTENNA_RX_DIVERSITY	0x00000001
  #define ANTENNA_TX_DIVERSITY	0x00000002
  #define ANTENNA_MODE_SAMPLE	0x00000004
  
  	/*
  	 * Currently active TX/RX antenna setup.
  	 * When software diversity is used, this will indicate
  	 * which antenna is actually used at this time.
  	 */
  	struct antenna_setup active;
  
  	/*
  	 * RSSI history information for the antenna.
  	 * Used to determine when to switch antenna
  	 * when using software diversity.
  	 */
  	int rssi_history;
  
  	/*
  	 * Current RSSI average of the currently active antenna.
  	 * Similar to the avg_rssi in the link_qual structure
  	 * this value is updated by using the walking average.
  	 */
  	struct ewma_rssi rssi_ant;
  };
  
  /*
   * To optimize the quality of the link we need to store
   * the quality of received frames and periodically
   * optimize the link.
   */
  struct link {
  	/*
  	 * Link tuner counter
  	 * The number of times the link has been tuned
  	 * since the radio has been switched on.
  	 */
  	u32 count;
  
  	/*
  	 * Quality measurement values.
  	 */
  	struct link_qual qual;
  
  	/*
  	 * TX/RX antenna setup.
  	 */
  	struct link_ant ant;
  
  	/*
  	 * Currently active average RSSI value
  	 */
  	struct ewma_rssi avg_rssi;
  
  	/*
  	 * Work structure for scheduling periodic link tuning.
  	 */
  	struct delayed_work work;
  
  	/*
  	 * Work structure for scheduling periodic watchdog monitoring.
  	 * This work must be scheduled on the kernel workqueue, while
  	 * all other work structures must be queued on the mac80211
  	 * workqueue. This guarantees that the watchdog can schedule
  	 * other work structures and wait for their completion in order
  	 * to bring the device/driver back into the desired state.
  	 */
  	struct delayed_work watchdog_work;
  	unsigned int watchdog_interval;
  	bool watchdog_disabled;
  
  	/*
  	 * Work structure for scheduling periodic AGC adjustments.
  	 */
  	struct delayed_work agc_work;
  
  	/*
  	 * Work structure for scheduling periodic VCO calibration.
  	 */
  	struct delayed_work vco_work;
  };
  
  enum rt2x00_delayed_flags {
  	DELAYED_UPDATE_BEACON,
  };
  
  /*
   * Interface structure
   * Per interface configuration details, this structure
   * is allocated as the private data for ieee80211_vif.
   */
  struct rt2x00_intf {
  	/*
  	 * beacon->skb must be protected with the mutex.
  	 */
  	struct mutex beacon_skb_mutex;
  
  	/*
  	 * Entry in the beacon queue which belongs to
  	 * this interface. Each interface has its own
  	 * dedicated beacon entry.
  	 */
  	struct queue_entry *beacon;
  	bool enable_beacon;
  
  	/*
  	 * Actions that needed rescheduling.
  	 */
  	unsigned long delayed_flags;
  
  	/*
  	 * Software sequence counter, this is only required
  	 * for hardware which doesn't support hardware
  	 * sequence counting.
  	 */
  	atomic_t seqno;
  };
  
  static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
  {
  	return (struct rt2x00_intf *)vif->drv_priv;
  }
  
  /**
   * struct hw_mode_spec: Hardware specifications structure
   *
   * Details about the supported modes, rates and channels
   * of a particular chipset. This is used by rt2x00lib
   * to build the ieee80211_hw_mode array for mac80211.
   *
   * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
   * @supported_rates: Rate types which are supported (CCK, OFDM).
   * @num_channels: Number of supported channels. This is used as array size
   *	for @tx_power_a, @tx_power_bg and @channels.
   * @channels: Device/chipset specific channel values (See &struct rf_channel).
   * @channels_info: Additional information for channels (See &struct channel_info).
   * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
   */
  struct hw_mode_spec {
  	unsigned int supported_bands;
  #define SUPPORT_BAND_2GHZ	0x00000001
  #define SUPPORT_BAND_5GHZ	0x00000002
  
  	unsigned int supported_rates;
  #define SUPPORT_RATE_CCK	0x00000001
  #define SUPPORT_RATE_OFDM	0x00000002
  
  	unsigned int num_channels;
  	const struct rf_channel *channels;
  	const struct channel_info *channels_info;
  
  	struct ieee80211_sta_ht_cap ht;
  };
  
  /*
   * Configuration structure wrapper around the
   * mac80211 configuration structure.
   * When mac80211 configures the driver, rt2x00lib
   * can precalculate values which are equal for all
   * rt2x00 drivers. Those values can be stored in here.
   */
  struct rt2x00lib_conf {
  	struct ieee80211_conf *conf;
  
  	struct rf_channel rf;
  	struct channel_info channel;
  };
  
  /*
   * Configuration structure for erp settings.
   */
  struct rt2x00lib_erp {
  	int short_preamble;
  	int cts_protection;
  
  	u32 basic_rates;
  
  	int slot_time;
  
  	short sifs;
  	short pifs;
  	short difs;
  	short eifs;
  
  	u16 beacon_int;
  	u16 ht_opmode;
  };
  
  /*
   * Configuration structure for hardware encryption.
   */
  struct rt2x00lib_crypto {
  	enum cipher cipher;
  
  	enum set_key_cmd cmd;
  	const u8 *address;
  
  	u32 bssidx;
  
  	u8 key[16];
  	u8 tx_mic[8];
  	u8 rx_mic[8];
  
  	int wcid;
  };
  
  /*
   * Configuration structure wrapper around the
   * rt2x00 interface configuration handler.
   */
  struct rt2x00intf_conf {
  	/*
  	 * Interface type
  	 */
  	enum nl80211_iftype type;
  
  	/*
  	 * TSF sync value, this is dependent on the operation type.
  	 */
  	enum tsf_sync sync;
  
  	/*
  	 * The MAC and BSSID addresses are simple array of bytes,
  	 * these arrays are little endian, so when sending the addresses
  	 * to the drivers, copy the it into a endian-signed variable.
  	 *
  	 * Note that all devices (except rt2500usb) have 32 bits
  	 * register word sizes. This means that whatever variable we
  	 * pass _must_ be a multiple of 32 bits. Otherwise the device
  	 * might not accept what we are sending to it.
  	 * This will also make it easier for the driver to write
  	 * the data to the device.
  	 */
  	__le32 mac[2];
  	__le32 bssid[2];
  };
  
  /*
   * Private structure for storing STA details
   * wcid: Wireless Client ID
   */
  struct rt2x00_sta {
  	int wcid;
  };
  
  static inline struct rt2x00_sta* sta_to_rt2x00_sta(struct ieee80211_sta *sta)
  {
  	return (struct rt2x00_sta *)sta->drv_priv;
  }
  
  /*
   * rt2x00lib callback functions.
   */
  struct rt2x00lib_ops {
  	/*
  	 * Interrupt handlers.
  	 */
  	irq_handler_t irq_handler;
  
  	/*
  	 * TX status tasklet handler.
  	 */
  	void (*txstatus_tasklet) (struct tasklet_struct *t);
  	void (*pretbtt_tasklet) (struct tasklet_struct *t);
  	void (*tbtt_tasklet) (struct tasklet_struct *t);
  	void (*rxdone_tasklet) (struct tasklet_struct *t);
  	void (*autowake_tasklet) (struct tasklet_struct *t);
  
  	/*
  	 * Device init handlers.
  	 */
  	int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
  	char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
  	int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
  			       const u8 *data, const size_t len);
  	int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
  			      const u8 *data, const size_t len);
  
  	/*
  	 * Device initialization/deinitialization handlers.
  	 */
  	int (*initialize) (struct rt2x00_dev *rt2x00dev);
  	void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
  
  	/*
  	 * queue initialization handlers
  	 */
  	bool (*get_entry_state) (struct queue_entry *entry);
  	void (*clear_entry) (struct queue_entry *entry);
  
  	/*
  	 * Radio control handlers.
  	 */
  	int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
  				 enum dev_state state);
  	int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
  	void (*link_stats) (struct rt2x00_dev *rt2x00dev,
  			    struct link_qual *qual);
  	void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
  			     struct link_qual *qual);
  	void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
  			    struct link_qual *qual, const u32 count);
  	void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
  	void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
  
  	/*
  	 * Data queue handlers.
  	 */
  	void (*watchdog) (struct rt2x00_dev *rt2x00dev);
  	void (*start_queue) (struct data_queue *queue);
  	void (*kick_queue) (struct data_queue *queue);
  	void (*stop_queue) (struct data_queue *queue);
  	void (*flush_queue) (struct data_queue *queue, bool drop);
  	void (*tx_dma_done) (struct queue_entry *entry);
  
  	/*
  	 * TX control handlers
  	 */
  	void (*write_tx_desc) (struct queue_entry *entry,
  			       struct txentry_desc *txdesc);
  	void (*write_tx_data) (struct queue_entry *entry,
  			       struct txentry_desc *txdesc);
  	void (*write_beacon) (struct queue_entry *entry,
  			      struct txentry_desc *txdesc);
  	void (*clear_beacon) (struct queue_entry *entry);
  	int (*get_tx_data_len) (struct queue_entry *entry);
  
  	/*
  	 * RX control handlers
  	 */
  	void (*fill_rxdone) (struct queue_entry *entry,
  			     struct rxdone_entry_desc *rxdesc);
  
  	/*
  	 * Configuration handlers.
  	 */
  	int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
  				  struct rt2x00lib_crypto *crypto,
  				  struct ieee80211_key_conf *key);
  	int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
  				    struct rt2x00lib_crypto *crypto,
  				    struct ieee80211_key_conf *key);
  	void (*config_filter) (struct rt2x00_dev *rt2x00dev,
  			       const unsigned int filter_flags);
  	void (*config_intf) (struct rt2x00_dev *rt2x00dev,
  			     struct rt2x00_intf *intf,
  			     struct rt2x00intf_conf *conf,
  			     const unsigned int flags);
  #define CONFIG_UPDATE_TYPE		( 1 << 1 )
  #define CONFIG_UPDATE_MAC		( 1 << 2 )
  #define CONFIG_UPDATE_BSSID		( 1 << 3 )
  
  	void (*config_erp) (struct rt2x00_dev *rt2x00dev,
  			    struct rt2x00lib_erp *erp,
  			    u32 changed);
  	void (*config_ant) (struct rt2x00_dev *rt2x00dev,
  			    struct antenna_setup *ant);
  	void (*config) (struct rt2x00_dev *rt2x00dev,
  			struct rt2x00lib_conf *libconf,
  			const unsigned int changed_flags);
  	void (*pre_reset_hw) (struct rt2x00_dev *rt2x00dev);
  	int (*sta_add) (struct rt2x00_dev *rt2x00dev,
  			struct ieee80211_vif *vif,
  			struct ieee80211_sta *sta);
  	int (*sta_remove) (struct rt2x00_dev *rt2x00dev,
  			   struct ieee80211_sta *sta);
  };
  
  /*
   * rt2x00 driver callback operation structure.
   */
  struct rt2x00_ops {
  	const char *name;
  	const unsigned int drv_data_size;
  	const unsigned int max_ap_intf;
  	const unsigned int eeprom_size;
  	const unsigned int rf_size;
  	const unsigned int tx_queues;
  	void (*queue_init)(struct data_queue *queue);
  	const struct rt2x00lib_ops *lib;
  	const void *drv;
  	const struct ieee80211_ops *hw;
  #ifdef CONFIG_RT2X00_LIB_DEBUGFS
  	const struct rt2x00debug *debugfs;
  #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
  };
  
  /*
   * rt2x00 state flags
   */
  enum rt2x00_state_flags {
  	/*
  	 * Device flags
  	 */
  	DEVICE_STATE_PRESENT,
  	DEVICE_STATE_REGISTERED_HW,
  	DEVICE_STATE_INITIALIZED,
  	DEVICE_STATE_STARTED,
  	DEVICE_STATE_ENABLED_RADIO,
  	DEVICE_STATE_SCANNING,
  	DEVICE_STATE_FLUSHING,
  	DEVICE_STATE_RESET,
  
  	/*
  	 * Driver configuration
  	 */
  	CONFIG_CHANNEL_HT40,
  	CONFIG_POWERSAVING,
  	CONFIG_HT_DISABLED,
  	CONFIG_MONITORING,
  
  	/*
  	 * Mark we currently are sequentially reading TX_STA_FIFO register
  	 * FIXME: this is for only rt2800usb, should go to private data
  	 */
  	TX_STATUS_READING,
  };
  
  /*
   * rt2x00 capability flags
   */
  enum rt2x00_capability_flags {
  	/*
  	 * Requirements
  	 */
  	REQUIRE_FIRMWARE,
  	REQUIRE_BEACON_GUARD,
  	REQUIRE_ATIM_QUEUE,
  	REQUIRE_DMA,
  	REQUIRE_COPY_IV,
  	REQUIRE_L2PAD,
  	REQUIRE_TXSTATUS_FIFO,
  	REQUIRE_TASKLET_CONTEXT,
  	REQUIRE_SW_SEQNO,
  	REQUIRE_HT_TX_DESC,
  	REQUIRE_PS_AUTOWAKE,
  	REQUIRE_DELAYED_RFKILL,
  
  	/*
  	 * Capabilities
  	 */
  	CAPABILITY_HW_BUTTON,
  	CAPABILITY_HW_CRYPTO,
  	CAPABILITY_POWER_LIMIT,
  	CAPABILITY_CONTROL_FILTERS,
  	CAPABILITY_CONTROL_FILTER_PSPOLL,
  	CAPABILITY_PRE_TBTT_INTERRUPT,
  	CAPABILITY_LINK_TUNING,
  	CAPABILITY_FRAME_TYPE,
  	CAPABILITY_RF_SEQUENCE,
  	CAPABILITY_EXTERNAL_LNA_A,
  	CAPABILITY_EXTERNAL_LNA_BG,
  	CAPABILITY_DOUBLE_ANTENNA,
  	CAPABILITY_BT_COEXIST,
  	CAPABILITY_VCO_RECALIBRATION,
  	CAPABILITY_EXTERNAL_PA_TX0,
  	CAPABILITY_EXTERNAL_PA_TX1,
  	CAPABILITY_RESTART_HW,
  };
  
  /*
   * Interface combinations
   */
  enum {
  	IF_COMB_AP = 0,
  	NUM_IF_COMB,
  };
  
  /*
   * rt2x00 device structure.
   */
  struct rt2x00_dev {
  	/*
  	 * Device structure.
  	 * The structure stored in here depends on the
  	 * system bus (PCI or USB).
  	 * When accessing this variable, the rt2x00dev_{pci,usb}
  	 * macros should be used for correct typecasting.
  	 */
  	struct device *dev;
  
  	/*
  	 * Callback functions.
  	 */
  	const struct rt2x00_ops *ops;
  
  	/*
  	 * Driver data.
  	 */
  	void *drv_data;
  
  	/*
  	 * IEEE80211 control structure.
  	 */
  	struct ieee80211_hw *hw;
  	struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
  	enum nl80211_band curr_band;
  	int curr_freq;
  
  	/*
  	 * If enabled, the debugfs interface structures
  	 * required for deregistration of debugfs.
  	 */
  #ifdef CONFIG_RT2X00_LIB_DEBUGFS
  	struct rt2x00debug_intf *debugfs_intf;
  #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
  
  	/*
  	 * LED structure for changing the LED status
  	 * by mac8011 or the kernel.
  	 */
  #ifdef CONFIG_RT2X00_LIB_LEDS
  	struct rt2x00_led led_radio;
  	struct rt2x00_led led_assoc;
  	struct rt2x00_led led_qual;
  	u16 led_mcu_reg;
  #endif /* CONFIG_RT2X00_LIB_LEDS */
  
  	/*
  	 * Device state flags.
  	 * In these flags the current status is stored.
  	 * Access to these flags should occur atomically.
  	 */
  	unsigned long flags;
  
  	/*
  	 * Device capabiltiy flags.
  	 * In these flags the device/driver capabilities are stored.
  	 * Access to these flags should occur non-atomically.
  	 */
  	unsigned long cap_flags;
  
  	/*
  	 * Device information, Bus IRQ and name (PCI, SoC)
  	 */
  	int irq;
  	const char *name;
  
  	/*
  	 * Chipset identification.
  	 */
  	struct rt2x00_chip chip;
  
  	/*
  	 * hw capability specifications.
  	 */
  	struct hw_mode_spec spec;
  
  	/*
  	 * This is the default TX/RX antenna setup as indicated
  	 * by the device's EEPROM.
  	 */
  	struct antenna_setup default_ant;
  
  	/*
  	 * Register pointers
  	 * csr.base: CSR base register address. (PCI)
  	 * csr.cache: CSR cache for usb_control_msg. (USB)
  	 */
  	union csr {
  		void __iomem *base;
  		void *cache;
  	} csr;
  
  	/*
  	 * Mutex to protect register accesses.
  	 * For PCI and USB devices it protects against concurrent indirect
  	 * register access (BBP, RF, MCU) since accessing those
  	 * registers require multiple calls to the CSR registers.
  	 * For USB devices it also protects the csr_cache since that
  	 * field is used for normal CSR access and it cannot support
  	 * multiple callers simultaneously.
  	 */
  	struct mutex csr_mutex;
  
  	/*
  	 * Mutex to synchronize config and link tuner.
  	 */
  	struct mutex conf_mutex;
  	/*
  	 * Current packet filter configuration for the device.
  	 * This contains all currently active FIF_* flags send
  	 * to us by mac80211 during configure_filter().
  	 */
  	unsigned int packet_filter;
  
  	/*
  	 * Interface details:
  	 *  - Open ap interface count.
  	 *  - Open sta interface count.
  	 *  - Association count.
  	 *  - Beaconing enabled count.
  	 */
  	unsigned int intf_ap_count;
  	unsigned int intf_sta_count;
  	unsigned int intf_associated;
  	unsigned int intf_beaconing;
  
  	/*
  	 * Interface combinations
  	 */
  	struct ieee80211_iface_limit if_limits_ap;
  	struct ieee80211_iface_combination if_combinations[NUM_IF_COMB];
  
  	/*
  	 * Link quality
  	 */
  	struct link link;
  
  	/*
  	 * EEPROM data.
  	 */
  	__le16 *eeprom;
  
  	/*
  	 * Active RF register values.
  	 * These are stored here so we don't need
  	 * to read the rf registers and can directly
  	 * use this value instead.
  	 * This field should be accessed by using
  	 * rt2x00_rf_read() and rt2x00_rf_write().
  	 */
  	u32 *rf;
  
  	/*
  	 * LNA gain
  	 */
  	short lna_gain;
  
  	/*
  	 * Current TX power value.
  	 */
  	u16 tx_power;
  
  	/*
  	 * Current retry values.
  	 */
  	u8 short_retry;
  	u8 long_retry;
  
  	/*
  	 * Rssi <-> Dbm offset
  	 */
  	u8 rssi_offset;
  
  	/*
  	 * Frequency offset.
  	 */
  	u8 freq_offset;
  
  	/*
  	 * Association id.
  	 */
  	u16 aid;
  
  	/*
  	 * Beacon interval.
  	 */
  	u16 beacon_int;
  
  	/**
  	 * Timestamp of last received beacon
  	 */
  	unsigned long last_beacon;
  
  	/*
  	 * Low level statistics which will have
  	 * to be kept up to date while device is running.
  	 */
  	struct ieee80211_low_level_stats low_level_stats;
  
  	/**
  	 * Work queue for all work which should not be placed
  	 * on the mac80211 workqueue (because of dependencies
  	 * between various work structures).
  	 */
  	struct workqueue_struct *workqueue;
  
  	/*
  	 * Scheduled work.
  	 * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
  	 * which means it cannot be placed on the hw->workqueue
  	 * due to RTNL locking requirements.
  	 */
  	struct work_struct intf_work;
  
  	/**
  	 * Scheduled work for TX/RX done handling (USB devices)
  	 */
  	struct work_struct rxdone_work;
  	struct work_struct txdone_work;
  
  	/*
  	 * Powersaving work
  	 */
  	struct delayed_work autowakeup_work;
  	struct work_struct sleep_work;
  
  	/*
  	 * Data queue arrays for RX, TX, Beacon and ATIM.
  	 */
  	unsigned int data_queues;
  	struct data_queue *rx;
  	struct data_queue *tx;
  	struct data_queue *bcn;
  	struct data_queue *atim;
  
  	/*
  	 * Firmware image.
  	 */
  	const struct firmware *fw;
  
  	/*
  	 * FIFO for storing tx status reports between isr and tasklet.
  	 */
  	DECLARE_KFIFO_PTR(txstatus_fifo, u32);
  
  	/*
  	 * Timer to ensure tx status reports are read (rt2800usb).
  	 */
  	struct hrtimer txstatus_timer;
  
  	/*
  	 * Tasklet for processing tx status reports (rt2800pci).
  	 */
  	struct tasklet_struct txstatus_tasklet;
  	struct tasklet_struct pretbtt_tasklet;
  	struct tasklet_struct tbtt_tasklet;
  	struct tasklet_struct rxdone_tasklet;
  	struct tasklet_struct autowake_tasklet;
  
  	/*
  	 * Used for VCO periodic calibration.
  	 */
  	int rf_channel;
  
  	/*
  	 * Protect the interrupt mask register.
  	 */
  	spinlock_t irqmask_lock;
  
  	/*
  	 * List of BlockAckReq TX entries that need driver BlockAck processing.
  	 */
  	struct list_head bar_list;
  	spinlock_t bar_list_lock;
  
  	/* Extra TX headroom required for alignment purposes. */
  	unsigned int extra_tx_headroom;
  
  	struct usb_anchor *anchor;
  	unsigned int num_proto_errs;
  
  	/* Clock for System On Chip devices. */
  	struct clk *clk;
  };
  
  struct rt2x00_bar_list_entry {
  	struct list_head list;
  	struct rcu_head head;
  
  	struct queue_entry *entry;
  	int block_acked;
  
  	/* Relevant parts of the IEEE80211 BAR header */
  	__u8 ra[6];
  	__u8 ta[6];
  	__le16 control;
  	__le16 start_seq_num;
  };
  
  /*
   * Register defines.
   * Some registers require multiple attempts before success,
   * in those cases REGISTER_BUSY_COUNT attempts should be
   * taken with a REGISTER_BUSY_DELAY interval. Due to USB
   * bus delays, we do not have to loop so many times to wait
   * for valid register value on that bus.
   */
  #define REGISTER_BUSY_COUNT	100
  #define REGISTER_USB_BUSY_COUNT 20
  #define REGISTER_BUSY_DELAY	100
  
  /*
   * Generic RF access.
   * The RF is being accessed by word index.
   */
  static inline u32 rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
  				 const unsigned int word)
  {
  	BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
  	return rt2x00dev->rf[word - 1];
  }
  
  static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
  				   const unsigned int word, u32 data)
  {
  	BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
  	rt2x00dev->rf[word - 1] = data;
  }
  
  /*
   * Generic EEPROM access. The EEPROM is being accessed by word or byte index.
   */
  static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
  				       const unsigned int word)
  {
  	return (void *)&rt2x00dev->eeprom[word];
  }
  
  static inline u16 rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
  				     const unsigned int word)
  {
  	return le16_to_cpu(rt2x00dev->eeprom[word]);
  }
  
  static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
  				       const unsigned int word, u16 data)
  {
  	rt2x00dev->eeprom[word] = cpu_to_le16(data);
  }
  
  static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev,
  				    const unsigned int byte)
  {
  	return *(((u8 *)rt2x00dev->eeprom) + byte);
  }
  
  /*
   * Chipset handlers
   */
  static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
  				   const u16 rt, const u16 rf, const u16 rev)
  {
  	rt2x00dev->chip.rt = rt;
  	rt2x00dev->chip.rf = rf;
  	rt2x00dev->chip.rev = rev;
  
  	rt2x00_info(rt2x00dev, "Chipset detected - rt: %04x, rf: %04x, rev: %04x\n",
  		    rt2x00dev->chip.rt, rt2x00dev->chip.rf,
  		    rt2x00dev->chip.rev);
  }
  
  static inline void rt2x00_set_rt(struct rt2x00_dev *rt2x00dev,
  				 const u16 rt, const u16 rev)
  {
  	rt2x00dev->chip.rt = rt;
  	rt2x00dev->chip.rev = rev;
  
  	rt2x00_info(rt2x00dev, "RT chipset %04x, rev %04x detected\n",
  		    rt2x00dev->chip.rt, rt2x00dev->chip.rev);
  }
  
  static inline void rt2x00_set_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
  {
  	rt2x00dev->chip.rf = rf;
  
  	rt2x00_info(rt2x00dev, "RF chipset %04x detected\n",
  		    rt2x00dev->chip.rf);
  }
  
  static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
  {
  	return (rt2x00dev->chip.rt == rt);
  }
  
  static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
  {
  	return (rt2x00dev->chip.rf == rf);
  }
  
  static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00dev->chip.rev;
  }
  
  static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
  				 const u16 rt, const u16 rev)
  {
  	return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
  }
  
  static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
  				    const u16 rt, const u16 rev)
  {
  	return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
  }
  
  static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
  				     const u16 rt, const u16 rev)
  {
  	return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
  }
  
  static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
  					enum rt2x00_chip_intf intf)
  {
  	rt2x00dev->chip.intf = intf;
  }
  
  static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
  			       enum rt2x00_chip_intf intf)
  {
  	return (rt2x00dev->chip.intf == intf);
  }
  
  static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
  	       rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
  }
  
  static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
  }
  
  static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
  }
  
  static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
  }
  
  /* Helpers for capability flags */
  
  static inline bool
  rt2x00_has_cap_flag(struct rt2x00_dev *rt2x00dev,
  		    enum rt2x00_capability_flags cap_flag)
  {
  	return test_bit(cap_flag, &rt2x00dev->cap_flags);
  }
  
  static inline bool
  rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO);
  }
  
  static inline bool
  rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT);
  }
  
  static inline bool
  rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS);
  }
  
  static inline bool
  rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL);
  }
  
  static inline bool
  rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT);
  }
  
  static inline bool
  rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING);
  }
  
  static inline bool
  rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE);
  }
  
  static inline bool
  rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE);
  }
  
  static inline bool
  rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A);
  }
  
  static inline bool
  rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG);
  }
  
  static inline bool
  rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);
  }
  
  static inline bool
  rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST);
  }
  
  static inline bool
  rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION);
  }
  
  static inline bool
  rt2x00_has_cap_restart_hw(struct rt2x00_dev *rt2x00dev)
  {
  	return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RESTART_HW);
  }
  
  /**
   * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
   * @entry: Pointer to &struct queue_entry
   *
   * Returns -ENOMEM if mapping fail, 0 otherwise.
   */
  int rt2x00queue_map_txskb(struct queue_entry *entry);
  
  /**
   * rt2x00queue_unmap_skb - Unmap a skb from DMA.
   * @entry: Pointer to &struct queue_entry
   */
  void rt2x00queue_unmap_skb(struct queue_entry *entry);
  
  /**
   * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer
   * @rt2x00dev: Pointer to &struct rt2x00_dev.
   * @queue: rt2x00 queue index (see &enum data_queue_qid).
   *
   * Returns NULL for non tx queues.
   */
  static inline struct data_queue *
  rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev,
  			 const enum data_queue_qid queue)
  {
  	if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
  		return &rt2x00dev->tx[queue];
  
  	if (queue == QID_ATIM)
  		return rt2x00dev->atim;
  
  	return NULL;
  }
  
  /**
   * rt2x00queue_get_entry - Get queue entry where the given index points to.
   * @queue: Pointer to &struct data_queue from where we obtain the entry.
   * @index: Index identifier for obtaining the correct index.
   */
  struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
  					  enum queue_index index);
  
  /**
   * rt2x00queue_pause_queue - Pause a data queue
   * @queue: Pointer to &struct data_queue.
   *
   * This function will pause the data queue locally, preventing
   * new frames to be added to the queue (while the hardware is
   * still allowed to run).
   */
  void rt2x00queue_pause_queue(struct data_queue *queue);
  
  /**
   * rt2x00queue_unpause_queue - unpause a data queue
   * @queue: Pointer to &struct data_queue.
   *
   * This function will unpause the data queue locally, allowing
   * new frames to be added to the queue again.
   */
  void rt2x00queue_unpause_queue(struct data_queue *queue);
  
  /**
   * rt2x00queue_start_queue - Start a data queue
   * @queue: Pointer to &struct data_queue.
   *
   * This function will start handling all pending frames in the queue.
   */
  void rt2x00queue_start_queue(struct data_queue *queue);
  
  /**
   * rt2x00queue_stop_queue - Halt a data queue
   * @queue: Pointer to &struct data_queue.
   *
   * This function will stop all pending frames in the queue.
   */
  void rt2x00queue_stop_queue(struct data_queue *queue);
  
  /**
   * rt2x00queue_flush_queue - Flush a data queue
   * @queue: Pointer to &struct data_queue.
   * @drop: True to drop all pending frames.
   *
   * This function will flush the queue. After this call
   * the queue is guaranteed to be empty.
   */
  void rt2x00queue_flush_queue(struct data_queue *queue, bool drop);
  
  /**
   * rt2x00queue_start_queues - Start all data queues
   * @rt2x00dev: Pointer to &struct rt2x00_dev.
   *
   * This function will loop through all available queues to start them
   */
  void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev);
  
  /**
   * rt2x00queue_stop_queues - Halt all data queues
   * @rt2x00dev: Pointer to &struct rt2x00_dev.
   *
   * This function will loop through all available queues to stop
   * any pending frames.
   */
  void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
  
  /**
   * rt2x00queue_flush_queues - Flush all data queues
   * @rt2x00dev: Pointer to &struct rt2x00_dev.
   * @drop: True to drop all pending frames.
   *
   * This function will loop through all available queues to flush
   * any pending frames.
   */
  void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop);
  
  /*
   * Debugfs handlers.
   */
  /**
   * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
   * @rt2x00dev: Pointer to &struct rt2x00_dev.
   * @type: The type of frame that is being dumped.
   * @entry: The queue entry containing the frame to be dumped.
   */
  #ifdef CONFIG_RT2X00_LIB_DEBUGFS
  void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
  			    enum rt2x00_dump_type type, struct queue_entry *entry);
  #else
  static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
  					  enum rt2x00_dump_type type,
  					  struct queue_entry *entry)
  {
  }
  #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
  
  /*
   * Utility functions.
   */
  u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,
  			 struct ieee80211_vif *vif);
  void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr);
  
  /*
   * Interrupt context handlers.
   */
  void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
  void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
  void rt2x00lib_dmastart(struct queue_entry *entry);
  void rt2x00lib_dmadone(struct queue_entry *entry);
  void rt2x00lib_txdone(struct queue_entry *entry,
  		      struct txdone_entry_desc *txdesc);
  void rt2x00lib_txdone_nomatch(struct queue_entry *entry,
  			      struct txdone_entry_desc *txdesc);
  void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
  void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp);
  
  /*
   * mac80211 handlers.
   */
  void rt2x00mac_tx(struct ieee80211_hw *hw,
  		  struct ieee80211_tx_control *control,
  		  struct sk_buff *skb);
  int rt2x00mac_start(struct ieee80211_hw *hw);
  void rt2x00mac_stop(struct ieee80211_hw *hw);
  void rt2x00mac_reconfig_complete(struct ieee80211_hw *hw,
  				 enum ieee80211_reconfig_type reconfig_type);
  int rt2x00mac_add_interface(struct ieee80211_hw *hw,
  			    struct ieee80211_vif *vif);
  void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
  				struct ieee80211_vif *vif);
  int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
  void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
  				unsigned int changed_flags,
  				unsigned int *total_flags,
  				u64 multicast);
  int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
  		      bool set);
  #ifdef CONFIG_RT2X00_LIB_CRYPTO
  int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
  		      struct ieee80211_vif *vif, struct ieee80211_sta *sta,
  		      struct ieee80211_key_conf *key);
  #else
  #define rt2x00mac_set_key	NULL
  #endif /* CONFIG_RT2X00_LIB_CRYPTO */
  void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
  			     struct ieee80211_vif *vif,
  			     const u8 *mac_addr);
  void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
  				struct ieee80211_vif *vif);
  int rt2x00mac_get_stats(struct ieee80211_hw *hw,
  			struct ieee80211_low_level_stats *stats);
  void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
  				struct ieee80211_vif *vif,
  				struct ieee80211_bss_conf *bss_conf,
  				u32 changes);
  int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
  		      struct ieee80211_vif *vif, u16 queue,
  		      const struct ieee80211_tx_queue_params *params);
  void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
  void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
  		     u32 queues, bool drop);
  int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
  int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
  void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
  			     u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
  bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw);
  
  /*
   * Driver allocation handlers.
   */
  int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
  void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
  
  int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev);
  int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
  
  #endif /* RT2X00_H */
  