b43.h

linux内核源码

	__be16 offset_size;
	union {
		__be16 d16;
		__be32 d32;
	} data __attribute__((__packed__));
} __attribute__((__packed__));


#define B43_PHYMODE(phytype)		(1 << (phytype))
#define B43_PHYMODE_A			B43_PHYMODE(B43_PHYTYPE_A)
#define B43_PHYMODE_B			B43_PHYMODE(B43_PHYTYPE_B)
#define B43_PHYMODE_G			B43_PHYMODE(B43_PHYTYPE_G)

struct b43_phy {
	/* Possible PHYMODEs on this PHY */
	u8 possible_phymodes;
	/* GMODE bit enabled? */
	bool gmode;
	/* Possible ieee80211 subsystem hwmodes for this PHY.
	 * Which mode is selected, depends on thr GMODE enabled bit */
#define B43_MAX_PHYHWMODES	2
	struct ieee80211_hw_mode hwmodes[B43_MAX_PHYHWMODES];

	/* Analog Type */
	u8 analog;
	/* B43_PHYTYPE_ */
	u8 type;
	/* PHY revision number. */
	u8 rev;

	/* Radio versioning */
	u16 radio_manuf;	/* Radio manufacturer */
	u16 radio_ver;		/* Radio version */
	u8 radio_rev;		/* Radio revision */

	bool locked;		/* Only used in b43_phy_{un}lock() */
	bool dyn_tssi_tbl;	/* tssi2dbm is kmalloc()ed. */

	/* ACI (adjacent channel interference) flags. */
	bool aci_enable;
	bool aci_wlan_automatic;
	bool aci_hw_rssi;

	/* Radio switched on/off */
	bool radio_on;
	struct {
		/* Values saved when turning the radio off.
		 * They are needed when turning it on again. */
		bool valid;
		u16 rfover;
		u16 rfoverval;
	} radio_off_context;

	u16 minlowsig[2];
	u16 minlowsigpos[2];

	/* TSSI to dBm table in use */
	const s8 *tssi2dbm;
	/* Target idle TSSI */
	int tgt_idle_tssi;
	/* Current idle TSSI */
	int cur_idle_tssi;

	/* LocalOscillator control values. */
	struct b43_txpower_lo_control *lo_control;
	/* Values from b43_calc_loopback_gain() */
	s16 max_lb_gain;	/* Maximum Loopback gain in hdB */
	s16 trsw_rx_gain;	/* TRSW RX gain in hdB */
	s16 lna_lod_gain;	/* LNA lod */
	s16 lna_gain;		/* LNA */
	s16 pga_gain;		/* PGA */

	/* PHY lock for core.rev < 3
	 * This lock is only used by b43_phy_{un}lock()
	 */
	spinlock_t lock;

	/* Desired TX power level (in dBm).
	 * This is set by the user and adjusted in b43_phy_xmitpower(). */
	u8 power_level;
	/* A-PHY TX Power control value. */
	u16 txpwr_offset;

	/* Current TX power level attenuation control values */
	struct b43_bbatt bbatt;
	struct b43_rfatt rfatt;
	u8 tx_control;		/* B43_TXCTL_XXX */
#ifdef CONFIG_B43_DEBUG
	bool manual_txpower_control;	/* Manual TX-power control enabled? */
#endif
	/* Hardware Power Control enabled? */
	bool hardware_power_control;

	/* Current Interference Mitigation mode */
	int interfmode;
	/* Stack of saved values from the Interference Mitigation code.
	 * Each value in the stack is layed out as follows:
	 * bit 0-11:  offset
	 * bit 12-15: register ID
	 * bit 16-32: value
	 * register ID is: 0x1 PHY, 0x2 Radio, 0x3 ILT
	 */
#define B43_INTERFSTACK_SIZE	26
	u32 interfstack[B43_INTERFSTACK_SIZE];	//FIXME: use a data structure

	/* Saved values from the NRSSI Slope calculation */
	s16 nrssi[2];
	s32 nrssislope;
	/* In memory nrssi lookup table. */
	s8 nrssi_lt[64];

	/* current channel */
	u8 channel;

	u16 lofcal;

	u16 initval;		//FIXME rename?
};

/* Data structures for DMA transmission, per 80211 core. */
struct b43_dma {
	struct b43_dmaring *tx_ring0;
	struct b43_dmaring *tx_ring1;
	struct b43_dmaring *tx_ring2;
	struct b43_dmaring *tx_ring3;
	struct b43_dmaring *tx_ring4;
	struct b43_dmaring *tx_ring5;

	struct b43_dmaring *rx_ring0;
	struct b43_dmaring *rx_ring3;	/* only available on core.rev < 5 */
};

/* Data structures for PIO transmission, per 80211 core. */
struct b43_pio {
	struct b43_pioqueue *queue0;
	struct b43_pioqueue *queue1;
	struct b43_pioqueue *queue2;
	struct b43_pioqueue *queue3;
};

/* Context information for a noise calculation (Link Quality). */
struct b43_noise_calculation {
	u8 channel_at_start;
	bool calculation_running;
	u8 nr_samples;
	s8 samples[8][4];
};

struct b43_stats {
	u8 link_noise;
	/* Store the last TX/RX times here for updating the leds. */
	unsigned long last_tx;
	unsigned long last_rx;
};

struct b43_key {
	/* If keyconf is NULL, this key is disabled.
	 * keyconf is a cookie. Don't derefenrence it outside of the set_key
	 * path, because b43 doesn't own it. */
	struct ieee80211_key_conf *keyconf;
	u8 algorithm;
};

struct b43_wldev;

/* Data structure for the WLAN parts (802.11 cores) of the b43 chip. */
struct b43_wl {
	/* Pointer to the active wireless device on this chip */
	struct b43_wldev *current_dev;
	/* Pointer to the ieee80211 hardware data structure */
	struct ieee80211_hw *hw;

	spinlock_t irq_lock;
	struct mutex mutex;
	spinlock_t leds_lock;

	/* We can only have one operating interface (802.11 core)
	 * at a time. General information about this interface follows.
	 */

	/* Opaque ID of the operating interface from the ieee80211
	 * subsystem. Do not modify.
	 */
	int if_id;
	/* The MAC address of the operating interface. */
	u8 mac_addr[ETH_ALEN];
	/* Current BSSID */
	u8 bssid[ETH_ALEN];
	/* Interface type. (IEEE80211_IF_TYPE_XXX) */
	int if_type;
	/* Is the card operating in AP, STA or IBSS mode? */
	bool operating;
	/* filter flags */
	unsigned int filter_flags;
	/* Stats about the wireless interface */
	struct ieee80211_low_level_stats ieee_stats;

	struct hwrng rng;
	u8 rng_initialized;
	char rng_name[30 + 1];

	/* The RF-kill button */
	struct b43_rfkill rfkill;

	/* List of all wireless devices on this chip */
	struct list_head devlist;
	u8 nr_devs;
};

/* Pointers to the firmware data and meta information about it. */
struct b43_firmware {
	/* Microcode */
	const struct firmware *ucode;
	/* PCM code */
	const struct firmware *pcm;
	/* Initial MMIO values for the firmware */
	const struct firmware *initvals;
	/* Initial MMIO values for the firmware, band-specific */
	const struct firmware *initvals_band;
	/* Firmware revision */
	u16 rev;
	/* Firmware patchlevel */
	u16 patch;
};

/* Device (802.11 core) initialization status. */
enum {
	B43_STAT_UNINIT = 0,	/* Uninitialized. */
	B43_STAT_INITIALIZED = 1,	/* Initialized, but not started, yet. */
	B43_STAT_STARTED = 2,	/* Up and running. */
};
#define b43_status(wldev)		atomic_read(&(wldev)->__init_status)
#define b43_set_status(wldev, stat)	do {			\
		atomic_set(&(wldev)->__init_status, (stat));	\
		smp_wmb();					\
					} while (0)

/* XXX---   HOW LOCKING WORKS IN B43   ---XXX
 *
 * You should always acquire both, wl->mutex and wl->irq_lock unless:
 * - You don't need to acquire wl->irq_lock, if the interface is stopped.
 * - You don't need to acquire wl->mutex in the IRQ handler, IRQ tasklet
 *   and packet TX path (and _ONLY_ there.)
 */

/* Data structure for one wireless device (802.11 core) */
struct b43_wldev {
	struct ssb_device *dev;
	struct b43_wl *wl;

	/* The device initialization status.
	 * Use b43_status() to query. */
	atomic_t __init_status;
	/* Saved init status for handling suspend. */
	int suspend_init_status;

	bool __using_pio;	/* Internal, use b43_using_pio(). */
	bool bad_frames_preempt;	/* Use "Bad Frames Preemption" (default off) */
	bool reg124_set_0x4;	/* Some variable to keep track of IRQ stuff. */
	bool short_preamble;	/* TRUE, if short preamble is enabled. */
	bool short_slot;	/* TRUE, if short slot timing is enabled. */
	bool radio_hw_enable;	/* saved state of radio hardware enabled state */

	/* PHY/Radio device. */
	struct b43_phy phy;
	union {
		/* DMA engines. */
		struct b43_dma dma;
		/* PIO engines. */
		struct b43_pio pio;
	};

	/* Various statistics about the physical device. */
	struct b43_stats stats;

	/* The device LEDs. */
	struct b43_led led_tx;
	struct b43_led led_rx;
	struct b43_led led_assoc;
	struct b43_led led_radio;

	/* Reason code of the last interrupt. */
	u32 irq_reason;
	u32 dma_reason[6];
	/* saved irq enable/disable state bitfield. */
	u32 irq_savedstate;
	/* Link Quality calculation context. */
	struct b43_noise_calculation noisecalc;
	/* if > 0 MAC is suspended. if == 0 MAC is enabled. */
	int mac_suspended;

	/* Interrupt Service Routine tasklet (bottom-half) */
	struct tasklet_struct isr_tasklet;

	/* Periodic tasks */
	struct delayed_work periodic_work;
	unsigned int periodic_state;

	struct work_struct restart_work;

	/* encryption/decryption */
	u16 ktp;		/* Key table pointer */
	u8 max_nr_keys;
	struct b43_key key[58];

	/* Cached beacon template while uploading the template. */
	struct sk_buff *cached_beacon;

	/* Firmware data */
	struct b43_firmware fw;

	/* Devicelist in struct b43_wl (all 802.11 cores) */
	struct list_head list;

	/* Debugging stuff follows. */
#ifdef CONFIG_B43_DEBUG
	struct b43_dfsentry *dfsentry;
#endif
};

static inline struct b43_wl *hw_to_b43_wl(struct ieee80211_hw *hw)
{
	return hw->priv;
}

/* Helper function, which returns a boolean.
 * TRUE, if PIO is used; FALSE, if DMA is used.
 */
#if defined(CONFIG_B43_DMA) && defined(CONFIG_B43_PIO)
static inline int b43_using_pio(struct b43_wldev *dev)
{
	return dev->__using_pio;
}
#elif defined(CONFIG_B43_DMA)
static inline int b43_using_pio(struct b43_wldev *dev)
{
	return 0;
}
#elif defined(CONFIG_B43_PIO)
static inline int b43_using_pio(struct b43_wldev *dev)
{
	return 1;
}
#else
# error "Using neither DMA nor PIO? Confused..."
#endif

static inline struct b43_wldev *dev_to_b43_wldev(struct device *dev)
{
	struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
	return ssb_get_drvdata(ssb_dev);
}

/* Is the device operating in a specified mode (IEEE80211_IF_TYPE_XXX). */
static inline int b43_is_mode(struct b43_wl *wl, int type)
{
	return (wl->operating && wl->if_type == type);
}

static inline u16 b43_read16(struct b43_wldev *dev, u16 offset)
{
	return ssb_read16(dev->dev, offset);
}

static inline void b43_write16(struct b43_wldev *dev, u16 offset, u16 value)
{
	ssb_write16(dev->dev, offset, value);
}

static inline u32 b43_read32(struct b43_wldev *dev, u16 offset)
{
	return ssb_read32(dev->dev, offset);
}

static inline void b43_write32(struct b43_wldev *dev, u16 offset, u32 value)
{
	ssb_write32(dev->dev, offset, value);
}

/* Message printing */
void b43info(struct b43_wl *wl, const char *fmt, ...)
    __attribute__ ((format(printf, 2, 3)));
void b43err(struct b43_wl *wl, const char *fmt, ...)
    __attribute__ ((format(printf, 2, 3)));
void b43warn(struct b43_wl *wl, const char *fmt, ...)
    __attribute__ ((format(printf, 2, 3)));
#if B43_DEBUG
void b43dbg(struct b43_wl *wl, const char *fmt, ...)
    __attribute__ ((format(printf, 2, 3)));
#else /* DEBUG */
# define b43dbg(wl, fmt...) do { /* nothing */ } while (0)
#endif /* DEBUG */

/* A WARN_ON variant that vanishes when b43 debugging is disabled.
 * This _also_ evaluates the arg with debugging disabled. */
#if B43_DEBUG
# define B43_WARN_ON(x)	WARN_ON(x)
#else
static inline bool __b43_warn_on_dummy(bool x) { return x; }
# define B43_WARN_ON(x)	__b43_warn_on_dummy(unlikely(!!(x)))
#endif

/** Limit a value between two limits */
#ifdef limit_value
# undef limit_value
#endif
#define limit_value(value, min, max)  \
	({						\
		typeof(value) __value = (value);	\
		typeof(value) __min = (min);		\
		typeof(value) __max = (max);		\
		if (__value < __min)			\
			__value = __min;		\
		else if (__value > __max)		\
			__value = __max;		\
		__value;				\
	})

/* Convert an integer to a Q5.2 value */
#define INT_TO_Q52(i)	((i) << 2)
/* Convert a Q5.2 value to an integer (precision loss!) */
#define Q52_TO_INT(q52)	((q52) >> 2)
/* Macros for printing a value in Q5.2 format */
#define Q52_FMT		"%u.%u"
#define Q52_ARG(q52)	Q52_TO_INT(q52), ((((q52) & 0x3) * 100) / 4)

#endif /* B43_H_ */