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linux/drivers/net/wireless/b43/phy_common.h
Michael Buesch 18c8adeb02 b43: Rewrite TX power adjustment 
This patch rewrites the TX power recalculation algorithms to scale better
with changed enviromnent. If there's low
TX traffic, the power will be checked against the desired values
every 60 seconds.
If there is high TX traffic, the check is redone every 2 seconds. This improves
the reaction times a lot and confuses the rate control less.
It will also reduce the time it initially takes to tune to a new TX power
value. With the old algorithm it could take about 30 to 45 seconds to settle to
a new power value. This will happen in about two to four seconds now.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-29 16:24:13 -04:00

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#ifndef LINUX_B43_PHY_COMMON_H_
#define LINUX_B43_PHY_COMMON_H_
#include <linux/rfkill.h>
struct b43_wldev;
/* PHY register routing bits */
#define B43_PHYROUTE 0x0C00 /* PHY register routing bits mask */
#define B43_PHYROUTE_BASE 0x0000 /* Base registers */
#define B43_PHYROUTE_OFDM_GPHY 0x0400 /* OFDM register routing for G-PHYs */
#define B43_PHYROUTE_EXT_GPHY 0x0800 /* Extended G-PHY registers */
#define B43_PHYROUTE_N_BMODE 0x0C00 /* N-PHY BMODE registers */
/* CCK (B-PHY) registers. */
#define B43_PHY_CCK(reg) ((reg) | B43_PHYROUTE_BASE)
/* N-PHY registers. */
#define B43_PHY_N(reg) ((reg) | B43_PHYROUTE_BASE)
/* N-PHY BMODE registers. */
#define B43_PHY_N_BMODE(reg) ((reg) | B43_PHYROUTE_N_BMODE)
/* OFDM (A-PHY) registers. */
#define B43_PHY_OFDM(reg) ((reg) | B43_PHYROUTE_OFDM_GPHY)
/* Extended G-PHY registers. */
#define B43_PHY_EXTG(reg) ((reg) | B43_PHYROUTE_EXT_GPHY)
/* Masks for the PHY versioning registers. */
#define B43_PHYVER_ANALOG 0xF000
#define B43_PHYVER_ANALOG_SHIFT 12
#define B43_PHYVER_TYPE 0x0F00
#define B43_PHYVER_TYPE_SHIFT 8
#define B43_PHYVER_VERSION 0x00FF
/**
* enum b43_interference_mitigation - Interference Mitigation mode
*
* @B43_INTERFMODE_NONE: Disabled
* @B43_INTERFMODE_NONWLAN: Non-WLAN Interference Mitigation
* @B43_INTERFMODE_MANUALWLAN: WLAN Interference Mitigation
* @B43_INTERFMODE_AUTOWLAN: Automatic WLAN Interference Mitigation
*/
enum b43_interference_mitigation {
B43_INTERFMODE_NONE,
B43_INTERFMODE_NONWLAN,
B43_INTERFMODE_MANUALWLAN,
B43_INTERFMODE_AUTOWLAN,
};
/* Antenna identifiers */
enum {
B43_ANTENNA0, /* Antenna 0 */
B43_ANTENNA1, /* Antenna 0 */
B43_ANTENNA_AUTO1, /* Automatic, starting with antenna 1 */
B43_ANTENNA_AUTO0, /* Automatic, starting with antenna 0 */
B43_ANTENNA2,
B43_ANTENNA3 = 8,
B43_ANTENNA_AUTO = B43_ANTENNA_AUTO0,
B43_ANTENNA_DEFAULT = B43_ANTENNA_AUTO,
};
/**
* enum b43_txpwr_result - Return value for the recalc_txpower PHY op.
*
* @B43_TXPWR_RES_NEED_ADJUST: Values changed. Hardware adjustment is needed.
* @B43_TXPWR_RES_DONE: No more work to do. Everything is done.
*/
enum b43_txpwr_result {
B43_TXPWR_RES_NEED_ADJUST,
B43_TXPWR_RES_DONE,
};
/**
* struct b43_phy_operations - Function pointers for PHY ops.
*
* @prepare: Prepare the PHY. This is called before @init.
* Can be NULL, if not required.
* @init: Initialize the PHY.
* Must not be NULL.
* @exit: Shutdown the PHY and free all data structures.
* Can be NULL, if not required.
*
* @phy_read: Read from a PHY register.
* Must not be NULL.
* @phy_write: Write to a PHY register.
* Must not be NULL.
* @radio_read: Read from a Radio register.
* Must not be NULL.
* @radio_write: Write to a Radio register.
* Must not be NULL.
*
* @supports_hwpctl: Returns a boolean whether Hardware Power Control
* is supported or not.
* If NULL, hwpctl is assumed to be never supported.
* @software_rfkill: Turn the radio ON or OFF.
* Possible state values are
* RFKILL_STATE_SOFT_BLOCKED or
* RFKILL_STATE_UNBLOCKED
* Must not be NULL.
* @switch_channel: Switch the radio to another channel.
* Must not be NULL.
* @get_default_chan: Just returns the default channel number.
* Must not be NULL.
* @set_rx_antenna: Set the antenna used for RX.
* Can be NULL, if not supported.
* @interf_mitigation: Switch the Interference Mitigation mode.
* Can be NULL, if not supported.
*
* @recalc_txpower: Recalculate the transmission power parameters.
* This callback has to recalculate the TX power settings,
* but does not need to write them to the hardware, yet.
* Returns enum b43_txpwr_result to indicate whether the hardware
* needs to be adjusted.
* If B43_TXPWR_NEED_ADJUST is returned, @adjust_txpower
* will be called later.
* If the parameter "ignore_tssi" is true, the TSSI values should
* be ignored and a recalculation of the power settings should be
* done even if the TSSI values did not change.
* This callback is called with wl->irq_lock held and must not sleep.
* Must not be NULL.
* @adjust_txpower: Write the previously calculated TX power settings
* (from @recalc_txpower) to the hardware.
* This function may sleep.
* Can be NULL, if (and ONLY if) @recalc_txpower _always_
* returns B43_TXPWR_RES_DONE.
*
* @pwork_15sec: Periodic work. Called every 15 seconds.
* Can be NULL, if not required.
* @pwork_60sec: Periodic work. Called every 60 seconds.
* Can be NULL, if not required.
*/
struct b43_phy_operations {
/* Initialisation */
int (*allocate)(struct b43_wldev *dev);
int (*prepare)(struct b43_wldev *dev);
int (*init)(struct b43_wldev *dev);
void (*exit)(struct b43_wldev *dev);
/* Register access */
u16 (*phy_read)(struct b43_wldev *dev, u16 reg);
void (*phy_write)(struct b43_wldev *dev, u16 reg, u16 value);
u16 (*radio_read)(struct b43_wldev *dev, u16 reg);
void (*radio_write)(struct b43_wldev *dev, u16 reg, u16 value);
/* Radio */
bool (*supports_hwpctl)(struct b43_wldev *dev);
void (*software_rfkill)(struct b43_wldev *dev, enum rfkill_state state);
int (*switch_channel)(struct b43_wldev *dev, unsigned int new_channel);
unsigned int (*get_default_chan)(struct b43_wldev *dev);
void (*set_rx_antenna)(struct b43_wldev *dev, int antenna);
int (*interf_mitigation)(struct b43_wldev *dev,
enum b43_interference_mitigation new_mode);
/* Transmission power adjustment */
enum b43_txpwr_result (*recalc_txpower)(struct b43_wldev *dev,
bool ignore_tssi);
void (*adjust_txpower)(struct b43_wldev *dev);
/* Misc */
void (*pwork_15sec)(struct b43_wldev *dev);
void (*pwork_60sec)(struct b43_wldev *dev);
};
struct b43_phy_a;
struct b43_phy_g;
struct b43_phy_n;
struct b43_phy {
/* Hardware operation callbacks. */
const struct b43_phy_operations *ops;
/* Most hardware context information is stored in the standard-
* specific data structures pointed to by the pointers below.
* Only one of them is valid (the currently enabled PHY). */
#ifdef CONFIG_B43_DEBUG
/* No union for debug build to force NULL derefs in buggy code. */
struct {
#else
union {
#endif
/* A-PHY specific information */
struct b43_phy_a *a;
/* G-PHY specific information */
struct b43_phy_g *g;
/* N-PHY specific information */
struct b43_phy_n *n;
};
/* Band support flags. */
bool supports_2ghz;
bool supports_5ghz;
/* GMODE bit enabled? */
bool gmode;
/* 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 */
/* Software state of the radio */
bool radio_on;
/* Desired TX power level (in dBm).
* This is set by the user and adjusted in b43_phy_xmitpower(). */
int desired_txpower;
/* Hardware Power Control enabled? */
bool hardware_power_control;
/* The time (in absolute jiffies) when the next TX power output
* check is needed. */
unsigned long next_txpwr_check_time;
/* current channel */
unsigned int channel;
/* PHY TX errors counter. */
atomic_t txerr_cnt;
#ifdef CONFIG_B43_DEBUG
/* PHY registers locked by b43_phy_lock()? */
bool phy_locked;
#endif /* B43_DEBUG */
};
/**
* b43_phy_operations_setup - Initialize the PHY operations datastructure
* based on the current PHY type.
*/
int b43_phy_operations_setup(struct b43_wldev *dev);
/**
* b43_phy_init - Initialise the PHY
*/
int b43_phy_init(struct b43_wldev *dev);
/**
* b43_phy_exit - Cleanup PHY
*/
void b43_phy_exit(struct b43_wldev *dev);
/**
* b43_has_hardware_pctl - Hardware Power Control supported?
* Returns a boolean, whether hardware power control is supported.
*/
bool b43_has_hardware_pctl(struct b43_wldev *dev);
/**
* b43_phy_read - 16bit PHY register read access
*/
u16 b43_phy_read(struct b43_wldev *dev, u16 reg);
/**
* b43_phy_write - 16bit PHY register write access
*/
void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value);
/**
* b43_phy_mask - Mask a PHY register with a mask
*/
void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask);
/**
* b43_phy_set - OR a PHY register with a bitmap
*/
void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set);
/**
* b43_phy_maskset - Mask and OR a PHY register with a mask and bitmap
*/
void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set);
/**
* b43_radio_read - 16bit Radio register read access
*/
u16 b43_radio_read(struct b43_wldev *dev, u16 reg);
#define b43_radio_read16 b43_radio_read /* DEPRECATED */
/**
* b43_radio_write - 16bit Radio register write access
*/
void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value);
#define b43_radio_write16 b43_radio_write /* DEPRECATED */
/**
* b43_radio_mask - Mask a 16bit radio register with a mask
*/
void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask);
/**
* b43_radio_set - OR a 16bit radio register with a bitmap
*/
void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set);
/**
* b43_radio_maskset - Mask and OR a radio register with a mask and bitmap
*/
void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set);
/**
* b43_radio_lock - Lock firmware radio register access
*/
void b43_radio_lock(struct b43_wldev *dev);
/**
* b43_radio_unlock - Unlock firmware radio register access
*/
void b43_radio_unlock(struct b43_wldev *dev);
/**
* b43_phy_lock - Lock firmware PHY register access
*/
void b43_phy_lock(struct b43_wldev *dev);
/**
* b43_phy_unlock - Unlock firmware PHY register access
*/
void b43_phy_unlock(struct b43_wldev *dev);
/**
* b43_switch_channel - Switch to another channel
*/
int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel);
/**
* B43_DEFAULT_CHANNEL - Switch to the default channel.
*/
#define B43_DEFAULT_CHANNEL UINT_MAX
/**
* b43_software_rfkill - Turn the radio ON or OFF in software.
*/
void b43_software_rfkill(struct b43_wldev *dev, enum rfkill_state state);
/**
* b43_phy_txpower_check - Check TX power output.
*
* Compare the current TX power output to the desired power emission
* and schedule an adjustment in case it mismatches.
* Requires wl->irq_lock locked.
*
* @flags: OR'ed enum b43_phy_txpower_check_flags flags.
* See the docs below.
*/
void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags);
/**
* enum b43_phy_txpower_check_flags - Flags for b43_phy_txpower_check()
*
* @B43_TXPWR_IGNORE_TIME: Ignore the schedule time and force-redo
* the check now.
* @B43_TXPWR_IGNORE_TSSI: Redo the recalculation, even if the average
* TSSI did not change.
*/
enum b43_phy_txpower_check_flags {
B43_TXPWR_IGNORE_TIME = (1 << 0),
B43_TXPWR_IGNORE_TSSI = (1 << 1),
};
struct work_struct;
void b43_phy_txpower_adjust_work(struct work_struct *work);
/**
* b43_phy_shm_tssi_read - Read the average of the last 4 TSSI from SHM.
*
* @shm_offset: The SHM address to read the values from.
*
* Returns the average of the 4 TSSI values, or a negative error code.
*/
int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset);
#endif /* LINUX_B43_PHY_COMMON_H_ */
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