drivers/net/wireless/b43/phy_common.h

   1 #ifndef LINUX_B43_PHY_COMMON_H_
   2 #define LINUX_B43_PHY_COMMON_H_
   3
   4 #include <linux/rfkill.h>
   5
   6 struct b43_wldev;
   7
   8
   9 /* PHY register routing bits */
  10 #define B43_PHYROUTE                    0x0C00 /* PHY register routing bits mask */
  11 #define  B43_PHYROUTE_BASE              0x0000 /* Base registers */
  12 #define  B43_PHYROUTE_OFDM_GPHY         0x0400 /* OFDM register routing for G-PHYs */
  13 #define  B43_PHYROUTE_EXT_GPHY          0x0800 /* Extended G-PHY registers */
  14 #define  B43_PHYROUTE_N_BMODE           0x0C00 /* N-PHY BMODE registers */
  15
  16 /* CCK (B-PHY) registers. */
  17 #define B43_PHY_CCK(reg)                ((reg) | B43_PHYROUTE_BASE)
  18 /* N-PHY registers. */
  19 #define B43_PHY_N(reg)                  ((reg) | B43_PHYROUTE_BASE)
  20 /* N-PHY BMODE registers. */
  21 #define B43_PHY_N_BMODE(reg)            ((reg) | B43_PHYROUTE_N_BMODE)
  22 /* OFDM (A-PHY) registers. */
  23 #define B43_PHY_OFDM(reg)               ((reg) | B43_PHYROUTE_OFDM_GPHY)
  24 /* Extended G-PHY registers. */
  25 #define B43_PHY_EXTG(reg)               ((reg) | B43_PHYROUTE_EXT_GPHY)
  26
  27
  28 /* Masks for the PHY versioning registers. */
  29 #define B43_PHYVER_ANALOG               0xF000
  30 #define B43_PHYVER_ANALOG_SHIFT         12
  31 #define B43_PHYVER_TYPE                 0x0F00
  32 #define B43_PHYVER_TYPE_SHIFT           8
  33 #define B43_PHYVER_VERSION              0x00FF
  34
  35 /**
  36  * enum b43_interference_mitigation - Interference Mitigation mode
  37  *
  38  * @B43_INTERFMODE_NONE:        Disabled
  39  * @B43_INTERFMODE_NONWLAN:     Non-WLAN Interference Mitigation
  40  * @B43_INTERFMODE_MANUALWLAN:  WLAN Interference Mitigation
  41  * @B43_INTERFMODE_AUTOWLAN:    Automatic WLAN Interference Mitigation
  42  */
  43 enum b43_interference_mitigation {
  44         B43_INTERFMODE_NONE,
  45         B43_INTERFMODE_NONWLAN,
  46         B43_INTERFMODE_MANUALWLAN,
  47         B43_INTERFMODE_AUTOWLAN,
  48 };
  49
  50 /* Antenna identifiers */
  51 enum {
  52         B43_ANTENNA0,           /* Antenna 0 */
  53         B43_ANTENNA1,           /* Antenna 0 */
  54         B43_ANTENNA_AUTO1,      /* Automatic, starting with antenna 1 */
  55         B43_ANTENNA_AUTO0,      /* Automatic, starting with antenna 0 */
  56         B43_ANTENNA2,
  57         B43_ANTENNA3 = 8,
  58
  59         B43_ANTENNA_AUTO = B43_ANTENNA_AUTO0,
  60         B43_ANTENNA_DEFAULT = B43_ANTENNA_AUTO,
  61 };
  62
  63 /**
  64  * enum b43_txpwr_result - Return value for the recalc_txpower PHY op.
  65  *
  66  * @B43_TXPWR_RES_NEED_ADJUST:  Values changed. Hardware adjustment is needed.
  67  * @B43_TXPWR_RES_DONE:         No more work to do. Everything is done.
  68  */
  69 enum b43_txpwr_result {
  70         B43_TXPWR_RES_NEED_ADJUST,
  71         B43_TXPWR_RES_DONE,
  72 };
  73
  74 /**
  75  * struct b43_phy_operations - Function pointers for PHY ops.
  76  *
  77  * @allocate:           Allocate and initialise the PHY data structures.
  78  *                      Must not be NULL.
  79  * @free:               Destroy and free the PHY data structures.
  80  *                      Must not be NULL.
  81  *
  82  * @prepare_structs:    Prepare the PHY data structures.
  83  *                      The data structures allocated in @allocate are
  84  *                      initialized here.
  85  *                      Must not be NULL.
  86  * @prepare_hardware:   Prepare the PHY. This is called before b43_chip_init to
  87  *                      do some early early PHY hardware init.
  88  *                      Can be NULL, if not required.
  89  * @init:               Initialize the PHY.
  90  *                      Must not be NULL.
  91  * @exit:               Shutdown the PHY.
  92  *                      Can be NULL, if not required.
  93  *
  94  * @phy_read:           Read from a PHY register.
  95  *                      Must not be NULL.
  96  * @phy_write:          Write to a PHY register.
  97  *                      Must not be NULL.
  98  * @radio_read:         Read from a Radio register.
  99  *                      Must not be NULL.
 100  * @radio_write:        Write to a Radio register.
 101  *                      Must not be NULL.
 102  *
 103  * @supports_hwpctl:    Returns a boolean whether Hardware Power Control
 104  *                      is supported or not.
 105  *                      If NULL, hwpctl is assumed to be never supported.
 106  * @software_rfkill:    Turn the radio ON or OFF.
 107  *                      Possible state values are
 108  *                      RFKILL_STATE_SOFT_BLOCKED or
 109  *                      RFKILL_STATE_UNBLOCKED
 110  *                      Must not be NULL.
 111  * @switch_analog:      Turn the Analog on/off.
 112  *                      Must not be NULL.
 113  * @switch_channel:     Switch the radio to another channel.
 114  *                      Must not be NULL.
 115  * @get_default_chan:   Just returns the default channel number.
 116  *                      Must not be NULL.
 117  * @set_rx_antenna:     Set the antenna used for RX.
 118  *                      Can be NULL, if not supported.
 119  * @interf_mitigation:  Switch the Interference Mitigation mode.
 120  *                      Can be NULL, if not supported.
 121  *
 122  * @recalc_txpower:     Recalculate the transmission power parameters.
 123  *                      This callback has to recalculate the TX power settings,
 124  *                      but does not need to write them to the hardware, yet.
 125  *                      Returns enum b43_txpwr_result to indicate whether the hardware
 126  *                      needs to be adjusted.
 127  *                      If B43_TXPWR_NEED_ADJUST is returned, @adjust_txpower
 128  *                      will be called later.
 129  *                      If the parameter "ignore_tssi" is true, the TSSI values should
 130  *                      be ignored and a recalculation of the power settings should be
 131  *                      done even if the TSSI values did not change.
 132  *                      This callback is called with wl->irq_lock held and must not sleep.
 133  *                      Must not be NULL.
 134  * @adjust_txpower:     Write the previously calculated TX power settings
 135  *                      (from @recalc_txpower) to the hardware.
 136  *                      This function may sleep.
 137  *                      Can be NULL, if (and ONLY if) @recalc_txpower _always_
 138  *                      returns B43_TXPWR_RES_DONE.
 139  *
 140  * @pwork_15sec:        Periodic work. Called every 15 seconds.
 141  *                      Can be NULL, if not required.
 142  * @pwork_60sec:        Periodic work. Called every 60 seconds.
 143  *                      Can be NULL, if not required.
 144  */
 145 struct b43_phy_operations {
 146         /* Initialisation */
 147         int (*allocate)(struct b43_wldev *dev);
 148         void (*free)(struct b43_wldev *dev);
 149         void (*prepare_structs)(struct b43_wldev *dev);
 150         int (*prepare_hardware)(struct b43_wldev *dev);
 151         int (*init)(struct b43_wldev *dev);
 152         void (*exit)(struct b43_wldev *dev);
 153
 154         /* Register access */
 155         u16 (*phy_read)(struct b43_wldev *dev, u16 reg);
 156         void (*phy_write)(struct b43_wldev *dev, u16 reg, u16 value);
 157         u16 (*radio_read)(struct b43_wldev *dev, u16 reg);
 158         void (*radio_write)(struct b43_wldev *dev, u16 reg, u16 value);
 159
 160         /* Radio */
 161         bool (*supports_hwpctl)(struct b43_wldev *dev);
 162         void (*software_rfkill)(struct b43_wldev *dev, bool blocked);
 163         void (*switch_analog)(struct b43_wldev *dev, bool on);
 164         int (*switch_channel)(struct b43_wldev *dev, unsigned int new_channel);
 165         unsigned int (*get_default_chan)(struct b43_wldev *dev);
 166         void (*set_rx_antenna)(struct b43_wldev *dev, int antenna);
 167         int (*interf_mitigation)(struct b43_wldev *dev,
 168                                  enum b43_interference_mitigation new_mode);
 169
 170         /* Transmission power adjustment */
 171         enum b43_txpwr_result (*recalc_txpower)(struct b43_wldev *dev,
 172                                                 bool ignore_tssi);
 173         void (*adjust_txpower)(struct b43_wldev *dev);
 174
 175         /* Misc */
 176         void (*pwork_15sec)(struct b43_wldev *dev);
 177         void (*pwork_60sec)(struct b43_wldev *dev);
 178 };
 179
 180 struct b43_phy_a;
 181 struct b43_phy_g;
 182 struct b43_phy_n;
 183 struct b43_phy_lp;
 184
 185 struct b43_phy {
 186         /* Hardware operation callbacks. */
 187         const struct b43_phy_operations *ops;
 188
 189         /* Most hardware context information is stored in the standard-
 190          * specific data structures pointed to by the pointers below.
 191          * Only one of them is valid (the currently enabled PHY). */
 192 #ifdef CONFIG_B43_DEBUG
 193         /* No union for debug build to force NULL derefs in buggy code. */
 194         struct {
 195 #else
 196         union {
 197 #endif
 198                 /* A-PHY specific information */
 199                 struct b43_phy_a *a;
 200                 /* G-PHY specific information */
 201                 struct b43_phy_g *g;
 202                 /* N-PHY specific information */
 203                 struct b43_phy_n *n;
 204                 /* LP-PHY specific information */
 205                 struct b43_phy_lp *lp;
 206         };
 207
 208         /* Band support flags. */
 209         bool supports_2ghz;
 210         bool supports_5ghz;
 211
 212         /* GMODE bit enabled? */
 213         bool gmode;
 214
 215         /* Analog Type */
 216         u8 analog;
 217         /* B43_PHYTYPE_ */
 218         u8 type;
 219         /* PHY revision number. */
 220         u8 rev;
 221
 222         /* Radio versioning */
 223         u16 radio_manuf;        /* Radio manufacturer */
 224         u16 radio_ver;          /* Radio version */
 225         u8 radio_rev;           /* Radio revision */
 226
 227         /* Software state of the radio */
 228         bool radio_on;
 229
 230         /* Desired TX power level (in dBm).
 231          * This is set by the user and adjusted in b43_phy_xmitpower(). */
 232         int desired_txpower;
 233
 234         /* Hardware Power Control enabled? */
 235         bool hardware_power_control;
 236
 237         /* The time (in absolute jiffies) when the next TX power output
 238          * check is needed. */
 239         unsigned long next_txpwr_check_time;
 240
 241         /* current channel */
 242         unsigned int channel;
 243
 244         /* PHY TX errors counter. */
 245         atomic_t txerr_cnt;
 246
 247 #ifdef CONFIG_B43_DEBUG
 248         /* PHY registers locked (w.r.t. firmware) */
 249         bool phy_locked;
 250         /* Radio registers locked (w.r.t. firmware) */
 251         bool radio_locked;
 252 #endif /* B43_DEBUG */
 253 };
 254
 255
 256 /**
 257  * b43_phy_allocate - Allocate PHY structs
 258  * Allocate the PHY data structures, based on the current dev->phy.type
 259  */
 260 int b43_phy_allocate(struct b43_wldev *dev);
 261
 262 /**
 263  * b43_phy_free - Free PHY structs
 264  */
 265 void b43_phy_free(struct b43_wldev *dev);
 266
 267 /**
 268  * b43_phy_init - Initialise the PHY
 269  */
 270 int b43_phy_init(struct b43_wldev *dev);
 271
 272 /**
 273  * b43_phy_exit - Cleanup PHY
 274  */
 275 void b43_phy_exit(struct b43_wldev *dev);
 276
 277 /**
 278  * b43_has_hardware_pctl - Hardware Power Control supported?
 279  * Returns a boolean, whether hardware power control is supported.
 280  */
 281 bool b43_has_hardware_pctl(struct b43_wldev *dev);
 282
 283 /**
 284  * b43_phy_read - 16bit PHY register read access
 285  */
 286 u16 b43_phy_read(struct b43_wldev *dev, u16 reg);
 287
 288 /**
 289  * b43_phy_write - 16bit PHY register write access
 290  */
 291 void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value);
 292
 293 /**
 294  * b43_phy_mask - Mask a PHY register with a mask
 295  */
 296 void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask);
 297
 298 /**
 299  * b43_phy_set - OR a PHY register with a bitmap
 300  */
 301 void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set);
 302
 303 /**
 304  * b43_phy_maskset - Mask and OR a PHY register with a mask and bitmap
 305  */
 306 void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set);
 307
 308 /**
 309  * b43_radio_read - 16bit Radio register read access
 310  */
 311 u16 b43_radio_read(struct b43_wldev *dev, u16 reg);
 312 #define b43_radio_read16        b43_radio_read /* DEPRECATED */
 313
 314 /**
 315  * b43_radio_write - 16bit Radio register write access
 316  */
 317 void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value);
 318 #define b43_radio_write16       b43_radio_write /* DEPRECATED */
 319
 320 /**
 321  * b43_radio_mask - Mask a 16bit radio register with a mask
 322  */
 323 void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask);
 324
 325 /**
 326  * b43_radio_set - OR a 16bit radio register with a bitmap
 327  */
 328 void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set);
 329
 330 /**
 331  * b43_radio_maskset - Mask and OR a radio register with a mask and bitmap
 332  */
 333 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set);
 334
 335 /**
 336  * b43_radio_lock - Lock firmware radio register access
 337  */
 338 void b43_radio_lock(struct b43_wldev *dev);
 339
 340 /**
 341  * b43_radio_unlock - Unlock firmware radio register access
 342  */
 343 void b43_radio_unlock(struct b43_wldev *dev);
 344
 345 /**
 346  * b43_phy_lock - Lock firmware PHY register access
 347  */
 348 void b43_phy_lock(struct b43_wldev *dev);
 349
 350 /**
 351  * b43_phy_unlock - Unlock firmware PHY register access
 352  */
 353 void b43_phy_unlock(struct b43_wldev *dev);
 354
 355 /**
 356  * b43_switch_channel - Switch to another channel
 357  */
 358 int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel);
 359 /**
 360  * B43_DEFAULT_CHANNEL - Switch to the default channel.
 361  */
 362 #define B43_DEFAULT_CHANNEL     UINT_MAX
 363
 364 /**
 365  * b43_software_rfkill - Turn the radio ON or OFF in software.
 366  */
 367 void b43_software_rfkill(struct b43_wldev *dev, bool blocked);
 368
 369 /**
 370  * b43_phy_txpower_check - Check TX power output.
 371  *
 372  * Compare the current TX power output to the desired power emission
 373  * and schedule an adjustment in case it mismatches.
 374  * Requires wl->irq_lock locked.
 375  *
 376  * @flags:      OR'ed enum b43_phy_txpower_check_flags flags.
 377  *              See the docs below.
 378  */
 379 void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags);
 380 /**
 381  * enum b43_phy_txpower_check_flags - Flags for b43_phy_txpower_check()
 382  *
 383  * @B43_TXPWR_IGNORE_TIME: Ignore the schedule time and force-redo
 384  *                         the check now.
 385  * @B43_TXPWR_IGNORE_TSSI: Redo the recalculation, even if the average
 386  *                         TSSI did not change.
 387  */
 388 enum b43_phy_txpower_check_flags {
 389         B43_TXPWR_IGNORE_TIME           = (1 << 0),
 390         B43_TXPWR_IGNORE_TSSI           = (1 << 1),
 391 };
 392
 393 struct work_struct;
 394 void b43_phy_txpower_adjust_work(struct work_struct *work);
 395
 396 /**
 397  * b43_phy_shm_tssi_read - Read the average of the last 4 TSSI from SHM.
 398  *
 399  * @shm_offset:         The SHM address to read the values from.
 400  *
 401  * Returns the average of the 4 TSSI values, or a negative error code.
 402  */
 403 int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset);
 404
 405 /**
 406  * b43_phy_switch_analog_generic - Generic PHY operation for switching the Analog.
 407  *
 408  * It does the switching based on the PHY0 core register.
 409  * Do _not_ call this directly. Only use it as a switch_analog callback
 410  * for struct b43_phy_operations.
 411  */
 412 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on);
 413
 414
 415 #endif /* LINUX_B43_PHY_COMMON_H_ */