drivers/net/wireless/rt2x00/rt2x00.h

   1 /*
   2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00
  23         Abstract: rt2x00 global information.
  24  */
  25
  26 #ifndef RT2X00_H
  27 #define RT2X00_H
  28
  29 #include <linux/bitops.h>
  30 #include <linux/skbuff.h>
  31 #include <linux/workqueue.h>
  32 #include <linux/firmware.h>
  33 #include <linux/leds.h>
  34 #include <linux/mutex.h>
  35 #include <linux/etherdevice.h>
  36
  37 #include <net/mac80211.h>
  38
  39 #include "rt2x00debug.h"
  40 #include "rt2x00leds.h"
  41 #include "rt2x00reg.h"
  42 #include "rt2x00queue.h"
  43
  44 /*
  45  * Module information.
  46  */
  47 #define DRV_VERSION     "2.0.14"
  48 #define DRV_PROJECT     "http://rt2x00.serialmonkey.com"
  49
  50 /*
  51  * Debug definitions.
  52  * Debug output has to be enabled during compile time.
  53  */
  54 #define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...)     \
  55         printk(__kernlvl "%s -> %s: %s - " __msg,                       \
  56                wiphy_name((__dev)->hw->wiphy), __FUNCTION__, __lvl, ##__args)
  57
  58 #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...)  \
  59         printk(__kernlvl "%s -> %s: %s - " __msg,               \
  60                KBUILD_MODNAME, __FUNCTION__, __lvl, ##__args)
  61
  62 #ifdef CONFIG_RT2X00_DEBUG
  63 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  64         DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args);
  65 #else
  66 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  67         do { } while (0)
  68 #endif /* CONFIG_RT2X00_DEBUG */
  69
  70 /*
  71  * Various debug levels.
  72  * The debug levels PANIC and ERROR both indicate serious problems,
  73  * for this reason they should never be ignored.
  74  * The special ERROR_PROBE message is for messages that are generated
  75  * when the rt2x00_dev is not yet initialized.
  76  */
  77 #define PANIC(__dev, __msg, __args...) \
  78         DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args)
  79 #define ERROR(__dev, __msg, __args...)  \
  80         DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args)
  81 #define ERROR_PROBE(__msg, __args...) \
  82         DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args)
  83 #define WARNING(__dev, __msg, __args...) \
  84         DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args)
  85 #define NOTICE(__dev, __msg, __args...) \
  86         DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args)
  87 #define INFO(__dev, __msg, __args...) \
  88         DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args)
  89 #define DEBUG(__dev, __msg, __args...) \
  90         DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args)
  91 #define EEPROM(__dev, __msg, __args...) \
  92         DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args)
  93
  94 /*
  95  * Standard timing and size defines.
  96  * These values should follow the ieee80211 specifications.
  97  */
  98 #define ACK_SIZE                14
  99 #define IEEE80211_HEADER        24
 100 #define PLCP                    48
 101 #define BEACON                  100
 102 #define PREAMBLE                144
 103 #define SHORT_PREAMBLE          72
 104 #define SLOT_TIME               20
 105 #define SHORT_SLOT_TIME         9
 106 #define SIFS                    10
 107 #define PIFS                    ( SIFS + SLOT_TIME )
 108 #define SHORT_PIFS              ( SIFS + SHORT_SLOT_TIME )
 109 #define DIFS                    ( PIFS + SLOT_TIME )
 110 #define SHORT_DIFS              ( SHORT_PIFS + SHORT_SLOT_TIME )
 111 #define EIFS                    ( SIFS + (8 * (IEEE80211_HEADER + ACK_SIZE)) )
 112
 113 /*
 114  * IEEE802.11 header defines
 115  */
 116 static inline int is_rts_frame(u16 fc)
 117 {
 118         return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 119                 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_RTS));
 120 }
 121
 122 static inline int is_cts_frame(u16 fc)
 123 {
 124         return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 125                 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_CTS));
 126 }
 127
 128 static inline int is_probe_resp(u16 fc)
 129 {
 130         return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) &&
 131                 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP));
 132 }
 133
 134 static inline int is_beacon(u16 fc)
 135 {
 136         return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) &&
 137                 ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON));
 138 }
 139
 140 /*
 141  * Chipset identification
 142  * The chipset on the device is composed of a RT and RF chip.
 143  * The chipset combination is important for determining device capabilities.
 144  */
 145 struct rt2x00_chip {
 146         u16 rt;
 147 #define RT2460          0x0101
 148 #define RT2560          0x0201
 149 #define RT2570          0x1201
 150 #define RT2561s         0x0301  /* Turbo */
 151 #define RT2561          0x0302
 152 #define RT2661          0x0401
 153 #define RT2571          0x1300
 154
 155         u16 rf;
 156         u32 rev;
 157 };
 158
 159 /*
 160  * RF register values that belong to a particular channel.
 161  */
 162 struct rf_channel {
 163         int channel;
 164         u32 rf1;
 165         u32 rf2;
 166         u32 rf3;
 167         u32 rf4;
 168 };
 169
 170 /*
 171  * Antenna setup values.
 172  */
 173 struct antenna_setup {
 174         enum antenna rx;
 175         enum antenna tx;
 176 };
 177
 178 /*
 179  * Quality statistics about the currently active link.
 180  */
 181 struct link_qual {
 182         /*
 183          * Statistics required for Link tuning.
 184          * For the average RSSI value we use the "Walking average" approach.
 185          * When adding RSSI to the average value the following calculation
 186          * is needed:
 187          *
 188          *        avg_rssi = ((avg_rssi * 7) + rssi) / 8;
 189          *
 190          * The advantage of this approach is that we only need 1 variable
 191          * to store the average in (No need for a count and a total).
 192          * But more importantly, normal average values will over time
 193          * move less and less towards newly added values this results
 194          * that with link tuning, the device can have a very good RSSI
 195          * for a few minutes but when the device is moved away from the AP
 196          * the average will not decrease fast enough to compensate.
 197          * The walking average compensates this and will move towards
 198          * the new values correctly allowing a effective link tuning.
 199          */
 200         int avg_rssi;
 201         int false_cca;
 202
 203         /*
 204          * Statistics required for Signal quality calculation.
 205          * For calculating the Signal quality we have to determine
 206          * the total number of success and failed RX and TX frames.
 207          * After that we also use the average RSSI value to help
 208          * determining the signal quality.
 209          * For the calculation we will use the following algorithm:
 210          *
 211          *         rssi_percentage = (avg_rssi * 100) / rssi_offset
 212          *         rx_percentage = (rx_success * 100) / rx_total
 213          *         tx_percentage = (tx_success * 100) / tx_total
 214          *         avg_signal = ((WEIGHT_RSSI * avg_rssi) +
 215          *                       (WEIGHT_TX * tx_percentage) +
 216          *                       (WEIGHT_RX * rx_percentage)) / 100
 217          *
 218          * This value should then be checked to not be greated then 100.
 219          */
 220         int rx_percentage;
 221         int rx_success;
 222         int rx_failed;
 223         int tx_percentage;
 224         int tx_success;
 225         int tx_failed;
 226 #define WEIGHT_RSSI     20
 227 #define WEIGHT_RX       40
 228 #define WEIGHT_TX       40
 229 };
 230
 231 /*
 232  * Antenna settings about the currently active link.
 233  */
 234 struct link_ant {
 235         /*
 236          * Antenna flags
 237          */
 238         unsigned int flags;
 239 #define ANTENNA_RX_DIVERSITY    0x00000001
 240 #define ANTENNA_TX_DIVERSITY    0x00000002
 241 #define ANTENNA_MODE_SAMPLE     0x00000004
 242
 243         /*
 244          * Currently active TX/RX antenna setup.
 245          * When software diversity is used, this will indicate
 246          * which antenna is actually used at this time.
 247          */
 248         struct antenna_setup active;
 249
 250         /*
 251          * RSSI information for the different antenna's.
 252          * These statistics are used to determine when
 253          * to switch antenna when using software diversity.
 254          *
 255          *        rssi[0] -> Antenna A RSSI
 256          *        rssi[1] -> Antenna B RSSI
 257          */
 258         int rssi_history[2];
 259
 260         /*
 261          * Current RSSI average of the currently active antenna.
 262          * Similar to the avg_rssi in the link_qual structure
 263          * this value is updated by using the walking average.
 264          */
 265         int rssi_ant;
 266 };
 267
 268 /*
 269  * To optimize the quality of the link we need to store
 270  * the quality of received frames and periodically
 271  * optimize the link.
 272  */
 273 struct link {
 274         /*
 275          * Link tuner counter
 276          * The number of times the link has been tuned
 277          * since the radio has been switched on.
 278          */
 279         u32 count;
 280
 281         /*
 282          * Quality measurement values.
 283          */
 284         struct link_qual qual;
 285
 286         /*
 287          * TX/RX antenna setup.
 288          */
 289         struct link_ant ant;
 290
 291         /*
 292          * Active VGC level
 293          */
 294         int vgc_level;
 295
 296         /*
 297          * Work structure for scheduling periodic link tuning.
 298          */
 299         struct delayed_work work;
 300 };
 301
 302 /*
 303  * Small helper macro to work with moving/walking averages.
 304  */
 305 #define MOVING_AVERAGE(__avg, __val, __samples) \
 306         ( (((__avg) * ((__samples) - 1)) + (__val)) / (__samples) )
 307
 308 /*
 309  * When we lack RSSI information return something less then -80 to
 310  * tell the driver to tune the device to maximum sensitivity.
 311  */
 312 #define DEFAULT_RSSI    ( -128 )
 313
 314 /*
 315  * Link quality access functions.
 316  */
 317 static inline int rt2x00_get_link_rssi(struct link *link)
 318 {
 319         if (link->qual.avg_rssi && link->qual.rx_success)
 320                 return link->qual.avg_rssi;
 321         return DEFAULT_RSSI;
 322 }
 323
 324 static inline int rt2x00_get_link_ant_rssi(struct link *link)
 325 {
 326         if (link->ant.rssi_ant && link->qual.rx_success)
 327                 return link->ant.rssi_ant;
 328         return DEFAULT_RSSI;
 329 }
 330
 331 static inline int rt2x00_get_link_ant_rssi_history(struct link *link,
 332                                                    enum antenna ant)
 333 {
 334         if (link->ant.rssi_history[ant - ANTENNA_A])
 335                 return link->ant.rssi_history[ant - ANTENNA_A];
 336         return DEFAULT_RSSI;
 337 }
 338
 339 static inline int rt2x00_update_ant_rssi(struct link *link, int rssi)
 340 {
 341         int old_rssi = link->ant.rssi_history[link->ant.active.rx - ANTENNA_A];
 342         link->ant.rssi_history[link->ant.active.rx - ANTENNA_A] = rssi;
 343         return old_rssi;
 344 }
 345
 346 /*
 347  * Interface structure
 348  * Per interface configuration details, this structure
 349  * is allocated as the private data for ieee80211_vif.
 350  */
 351 struct rt2x00_intf {
 352         /*
 353          * All fields within the rt2x00_intf structure
 354          * must be protected with a spinlock.
 355          */
 356         spinlock_t lock;
 357
 358         /*
 359          * BSS configuration. Copied from the structure
 360          * passed to us through the bss_info_changed()
 361          * callback funtion.
 362          */
 363         struct ieee80211_bss_conf conf;
 364
 365         /*
 366          * MAC of the device.
 367          */
 368         u8 mac[ETH_ALEN];
 369
 370         /*
 371          * BBSID of the AP to associate with.
 372          */
 373         u8 bssid[ETH_ALEN];
 374
 375         /*
 376          * Entry in the beacon queue which belongs to
 377          * this interface. Each interface has its own
 378          * dedicated beacon entry.
 379          */
 380         struct queue_entry *beacon;
 381
 382         /*
 383          * Actions that needed rescheduling.
 384          */
 385         unsigned int delayed_flags;
 386 #define DELAYED_UPDATE_BEACON           0x00000001
 387 #define DELAYED_CONFIG_PREAMBLE         0x00000002
 388 };
 389
 390 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
 391 {
 392         return (struct rt2x00_intf *)vif->drv_priv;
 393 }
 394
 395 /*
 396  * Details about the supported modes, rates and channels
 397  * of a particular chipset. This is used by rt2x00lib
 398  * to build the ieee80211_hw_mode array for mac80211.
 399  */
 400 struct hw_mode_spec {
 401         /*
 402          * Number of modes, rates and channels.
 403          */
 404         int num_modes;
 405         int num_rates;
 406         int num_channels;
 407
 408         /*
 409          * txpower values.
 410          */
 411         const u8 *tx_power_a;
 412         const u8 *tx_power_bg;
 413         u8 tx_power_default;
 414
 415         /*
 416          * Device/chipset specific value.
 417          */
 418         const struct rf_channel *channels;
 419 };
 420
 421 /*
 422  * Configuration structure wrapper around the
 423  * mac80211 configuration structure.
 424  * When mac80211 configures the driver, rt2x00lib
 425  * can precalculate values which are equal for all
 426  * rt2x00 drivers. Those values can be stored in here.
 427  */
 428 struct rt2x00lib_conf {
 429         struct ieee80211_conf *conf;
 430         struct rf_channel rf;
 431
 432         struct antenna_setup ant;
 433
 434         enum ieee80211_band band;
 435
 436         int basic_rates;
 437         int slot_time;
 438
 439         short sifs;
 440         short pifs;
 441         short difs;
 442         short eifs;
 443 };
 444
 445 /*
 446  * Configuration structure wrapper around the
 447  * rt2x00 interface configuration handler.
 448  */
 449 struct rt2x00intf_conf {
 450         /*
 451          * Interface type
 452          */
 453         enum ieee80211_if_types type;
 454
 455         /*
 456          * TSF sync value, this is dependant on the operation type.
 457          */
 458         enum tsf_sync sync;
 459
 460         /*
 461          * The MAC and BSSID addressess are simple array of bytes,
 462          * these arrays are little endian, so when sending the addressess
 463          * to the drivers, copy the it into a endian-signed variable.
 464          *
 465          * Note that all devices (except rt2500usb) have 32 bits
 466          * register word sizes. This means that whatever variable we
 467          * pass _must_ be a multiple of 32 bits. Otherwise the device
 468          * might not accept what we are sending to it.
 469          * This will also make it easier for the driver to write
 470          * the data to the device.
 471          */
 472         __le32 mac[2];
 473         __le32 bssid[2];
 474 };
 475
 476 /*
 477  * rt2x00lib callback functions.
 478  */
 479 struct rt2x00lib_ops {
 480         /*
 481          * Interrupt handlers.
 482          */
 483         irq_handler_t irq_handler;
 484
 485         /*
 486          * Device init handlers.
 487          */
 488         int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
 489         char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
 490         int (*load_firmware) (struct rt2x00_dev *rt2x00dev, void *data,
 491                               const size_t len);
 492
 493         /*
 494          * Device initialization/deinitialization handlers.
 495          */
 496         int (*initialize) (struct rt2x00_dev *rt2x00dev);
 497         void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 498
 499         /*
 500          * queue initialization handlers
 501          */
 502         void (*init_rxentry) (struct rt2x00_dev *rt2x00dev,
 503                               struct queue_entry *entry);
 504         void (*init_txentry) (struct rt2x00_dev *rt2x00dev,
 505                               struct queue_entry *entry);
 506
 507         /*
 508          * Radio control handlers.
 509          */
 510         int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
 511                                  enum dev_state state);
 512         int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
 513         void (*link_stats) (struct rt2x00_dev *rt2x00dev,
 514                             struct link_qual *qual);
 515         void (*reset_tuner) (struct rt2x00_dev *rt2x00dev);
 516         void (*link_tuner) (struct rt2x00_dev *rt2x00dev);
 517         void (*led_brightness) (struct led_classdev *led_cdev,
 518                                 enum led_brightness brightness);
 519
 520         /*
 521          * TX control handlers
 522          */
 523         void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
 524                                struct sk_buff *skb,
 525                                struct txentry_desc *txdesc,
 526                                struct ieee80211_tx_control *control);
 527         int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
 528                               struct data_queue *queue, struct sk_buff *skb,
 529                               struct ieee80211_tx_control *control);
 530         int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev,
 531                                 struct sk_buff *skb);
 532         void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
 533                                const unsigned int queue);
 534
 535         /*
 536          * RX control handlers
 537          */
 538         void (*fill_rxdone) (struct queue_entry *entry,
 539                              struct rxdone_entry_desc *rxdesc);
 540
 541         /*
 542          * Configuration handlers.
 543          */
 544         void (*config_intf) (struct rt2x00_dev *rt2x00dev,
 545                              struct rt2x00_intf *intf,
 546                              struct rt2x00intf_conf *conf,
 547                              const unsigned int flags);
 548 #define CONFIG_UPDATE_TYPE              ( 1 << 1 )
 549 #define CONFIG_UPDATE_MAC               ( 1 << 2 )
 550 #define CONFIG_UPDATE_BSSID             ( 1 << 3 )
 551
 552         int (*config_preamble) (struct rt2x00_dev *rt2x00dev,
 553                                 const int short_preamble,
 554                                 const int ack_timeout,
 555                                 const int ack_consume_time);
 556         void (*config) (struct rt2x00_dev *rt2x00dev,
 557                         struct rt2x00lib_conf *libconf,
 558                         const unsigned int flags);
 559 #define CONFIG_UPDATE_PHYMODE           ( 1 << 1 )
 560 #define CONFIG_UPDATE_CHANNEL           ( 1 << 2 )
 561 #define CONFIG_UPDATE_TXPOWER           ( 1 << 3 )
 562 #define CONFIG_UPDATE_ANTENNA           ( 1 << 4 )
 563 #define CONFIG_UPDATE_SLOT_TIME         ( 1 << 5 )
 564 #define CONFIG_UPDATE_BEACON_INT        ( 1 << 6 )
 565 #define CONFIG_UPDATE_ALL               0xffff
 566 };
 567
 568 /*
 569  * rt2x00 driver callback operation structure.
 570  */
 571 struct rt2x00_ops {
 572         const char *name;
 573         const unsigned int max_sta_intf;
 574         const unsigned int max_ap_intf;
 575         const unsigned int eeprom_size;
 576         const unsigned int rf_size;
 577         const struct data_queue_desc *rx;
 578         const struct data_queue_desc *tx;
 579         const struct data_queue_desc *bcn;
 580         const struct data_queue_desc *atim;
 581         const struct rt2x00lib_ops *lib;
 582         const struct ieee80211_ops *hw;
 583 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 584         const struct rt2x00debug *debugfs;
 585 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 586 };
 587
 588 /*
 589  * rt2x00 device flags
 590  */
 591 enum rt2x00_flags {
 592         /*
 593          * Device state flags
 594          */
 595         DEVICE_PRESENT,
 596         DEVICE_REGISTERED_HW,
 597         DEVICE_INITIALIZED,
 598         DEVICE_STARTED,
 599         DEVICE_STARTED_SUSPEND,
 600         DEVICE_ENABLED_RADIO,
 601         DEVICE_DISABLED_RADIO_HW,
 602
 603         /*
 604          * Driver features
 605          */
 606         DRIVER_SUPPORT_MIXED_INTERFACES,
 607         DRIVER_REQUIRE_FIRMWARE,
 608         DRIVER_REQUIRE_FIRMWARE_CRC_ITU_T,
 609         DRIVER_REQUIRE_FIRMWARE_CCITT,
 610         DRIVER_REQUIRE_BEACON_GUARD,
 611         DRIVER_REQUIRE_ATIM_QUEUE,
 612
 613         /*
 614          * Driver configuration
 615          */
 616         CONFIG_SUPPORT_HW_BUTTON,
 617         CONFIG_FRAME_TYPE,
 618         CONFIG_RF_SEQUENCE,
 619         CONFIG_EXTERNAL_LNA_A,
 620         CONFIG_EXTERNAL_LNA_BG,
 621         CONFIG_DOUBLE_ANTENNA,
 622         CONFIG_DISABLE_LINK_TUNING,
 623 };
 624
 625 /*
 626  * rt2x00 device structure.
 627  */
 628 struct rt2x00_dev {
 629         /*
 630          * Device structure.
 631          * The structure stored in here depends on the
 632          * system bus (PCI or USB).
 633          * When accessing this variable, the rt2x00dev_{pci,usb}
 634          * macro's should be used for correct typecasting.
 635          */
 636         void *dev;
 637 #define rt2x00dev_pci(__dev)    ( (struct pci_dev *)(__dev)->dev )
 638 #define rt2x00dev_usb(__dev)    ( (struct usb_interface *)(__dev)->dev )
 639 #define rt2x00dev_usb_dev(__dev)\
 640         ( (struct usb_device *)interface_to_usbdev(rt2x00dev_usb(__dev)) )
 641
 642         /*
 643          * Callback functions.
 644          */
 645         const struct rt2x00_ops *ops;
 646
 647         /*
 648          * IEEE80211 control structure.
 649          */
 650         struct ieee80211_hw *hw;
 651         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 652         enum ieee80211_band curr_band;
 653
 654         /*
 655          * rfkill structure for RF state switching support.
 656          * This will only be compiled in when required.
 657          */
 658 #ifdef CONFIG_RT2X00_LIB_RFKILL
 659         struct rfkill *rfkill;
 660         struct input_polled_dev *poll_dev;
 661 #endif /* CONFIG_RT2X00_LIB_RFKILL */
 662
 663         /*
 664          * If enabled, the debugfs interface structures
 665          * required for deregistration of debugfs.
 666          */
 667 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 668         struct rt2x00debug_intf *debugfs_intf;
 669 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 670
 671         /*
 672          * LED structure for changing the LED status
 673          * by mac8011 or the kernel.
 674          */
 675 #ifdef CONFIG_RT2X00_LIB_LEDS
 676         unsigned int led_flags;
 677         struct rt2x00_trigger trigger_qual;
 678         struct rt2x00_led led_radio;
 679         struct rt2x00_led led_assoc;
 680         struct rt2x00_led led_qual;
 681         u16 led_mcu_reg;
 682 #endif /* CONFIG_RT2X00_LIB_LEDS */
 683
 684         /*
 685          * Device flags.
 686          * In these flags the current status and some
 687          * of the device capabilities are stored.
 688          */
 689         unsigned long flags;
 690
 691         /*
 692          * Chipset identification.
 693          */
 694         struct rt2x00_chip chip;
 695
 696         /*
 697          * hw capability specifications.
 698          */
 699         struct hw_mode_spec spec;
 700
 701         /*
 702          * This is the default TX/RX antenna setup as indicated
 703          * by the device's EEPROM. When mac80211 sets its
 704          * antenna value to 0 we should be using these values.
 705          */
 706         struct antenna_setup default_ant;
 707
 708         /*
 709          * Register pointers
 710          * csr_addr: Base register address. (PCI)
 711          * csr_cache: CSR cache for usb_control_msg. (USB)
 712          */
 713         void __iomem *csr_addr;
 714         void *csr_cache;
 715
 716         /*
 717          * Mutex to protect register accesses on USB devices.
 718          * There are 2 reasons this is needed, one is to ensure
 719          * use of the csr_cache (for USB devices) by one thread
 720          * isn't corrupted by another thread trying to access it.
 721          * The other is that access to BBP and RF registers
 722          * require multiple BUS transactions and if another thread
 723          * attempted to access one of those registers at the same
 724          * time one of the writes could silently fail.
 725          */
 726         struct mutex usb_cache_mutex;
 727
 728         /*
 729          * Current packet filter configuration for the device.
 730          * This contains all currently active FIF_* flags send
 731          * to us by mac80211 during configure_filter().
 732          */
 733         unsigned int packet_filter;
 734
 735         /*
 736          * Interface details:
 737          *  - Open ap interface count.
 738          *  - Open sta interface count.
 739          *  - Association count.
 740          */
 741         unsigned int intf_ap_count;
 742         unsigned int intf_sta_count;
 743         unsigned int intf_associated;
 744
 745         /*
 746          * Link quality
 747          */
 748         struct link link;
 749
 750         /*
 751          * EEPROM data.
 752          */
 753         __le16 *eeprom;
 754
 755         /*
 756          * Active RF register values.
 757          * These are stored here so we don't need
 758          * to read the rf registers and can directly
 759          * use this value instead.
 760          * This field should be accessed by using
 761          * rt2x00_rf_read() and rt2x00_rf_write().
 762          */
 763         u32 *rf;
 764
 765         /*
 766          * USB Max frame size (for rt2500usb & rt73usb).
 767          */
 768         u16 usb_maxpacket;
 769
 770         /*
 771          * Current TX power value.
 772          */
 773         u16 tx_power;
 774
 775         /*
 776          * Rssi <-> Dbm offset
 777          */
 778         u8 rssi_offset;
 779
 780         /*
 781          * Frequency offset (for rt61pci & rt73usb).
 782          */
 783         u8 freq_offset;
 784
 785         /*
 786          * Low level statistics which will have
 787          * to be kept up to date while device is running.
 788          */
 789         struct ieee80211_low_level_stats low_level_stats;
 790
 791         /*
 792          * RX configuration information.
 793          */
 794         struct ieee80211_rx_status rx_status;
 795
 796         /*
 797          * Scheduled work.
 798          */
 799         struct work_struct intf_work;
 800         struct work_struct filter_work;
 801
 802         /*
 803          * Data queue arrays for RX, TX and Beacon.
 804          * The Beacon array also contains the Atim queue
 805          * if that is supported by the device.
 806          */
 807         int data_queues;
 808         struct data_queue *rx;
 809         struct data_queue *tx;
 810         struct data_queue *bcn;
 811
 812         /*
 813          * Firmware image.
 814          */
 815         const struct firmware *fw;
 816 };
 817
 818 /*
 819  * Generic RF access.
 820  * The RF is being accessed by word index.
 821  */
 822 static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
 823                                   const unsigned int word, u32 *data)
 824 {
 825         *data = rt2x00dev->rf[word];
 826 }
 827
 828 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
 829                                    const unsigned int word, u32 data)
 830 {
 831         rt2x00dev->rf[word] = data;
 832 }
 833
 834 /*
 835  *  Generic EEPROM access.
 836  * The EEPROM is being accessed by word index.
 837  */
 838 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
 839                                        const unsigned int word)
 840 {
 841         return (void *)&rt2x00dev->eeprom[word];
 842 }
 843
 844 static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
 845                                       const unsigned int word, u16 *data)
 846 {
 847         *data = le16_to_cpu(rt2x00dev->eeprom[word]);
 848 }
 849
 850 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
 851                                        const unsigned int word, u16 data)
 852 {
 853         rt2x00dev->eeprom[word] = cpu_to_le16(data);
 854 }
 855
 856 /*
 857  * Chipset handlers
 858  */
 859 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
 860                                    const u16 rt, const u16 rf, const u32 rev)
 861 {
 862         INFO(rt2x00dev,
 863              "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n",
 864              rt, rf, rev);
 865
 866         rt2x00dev->chip.rt = rt;
 867         rt2x00dev->chip.rf = rf;
 868         rt2x00dev->chip.rev = rev;
 869 }
 870
 871 static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip)
 872 {
 873         return (chipset->rt == chip);
 874 }
 875
 876 static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip)
 877 {
 878         return (chipset->rf == chip);
 879 }
 880
 881 static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset)
 882 {
 883         return chipset->rev;
 884 }
 885
 886 static inline u16 rt2x00_check_rev(const struct rt2x00_chip *chipset,
 887                                    const u32 rev)
 888 {
 889         return (((chipset->rev & 0xffff0) == rev) &&
 890                 !!(chipset->rev & 0x0000f));
 891 }
 892
 893 /*
 894  * Duration calculations
 895  * The rate variable passed is: 100kbs.
 896  * To convert from bytes to bits we multiply size with 8,
 897  * then the size is multiplied with 10 to make the
 898  * real rate -> rate argument correction.
 899  */
 900 static inline u16 get_duration(const unsigned int size, const u8 rate)
 901 {
 902         return ((size * 8 * 10) / rate);
 903 }
 904
 905 static inline u16 get_duration_res(const unsigned int size, const u8 rate)
 906 {
 907         return ((size * 8 * 10) % rate);
 908 }
 909
 910 /**
 911  * rt2x00queue_get_queue - Convert mac80211 queue index to rt2x00 queue
 912  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 913  * @queue: mac80211/rt2x00 queue index
 914  *      (see &enum ieee80211_tx_queue and &enum rt2x00_bcn_queue).
 915  */
 916 struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
 917                                          const unsigned int queue);
 918
 919 /**
 920  * rt2x00queue_get_entry - Get queue entry where the given index points to.
 921  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 922  * @index: Index identifier for obtaining the correct index.
 923  */
 924 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
 925                                           enum queue_index index);
 926
 927 /**
 928  * rt2x00queue_index_inc - Index incrementation function
 929  * @queue: Queue (&struct data_queue) to perform the action on.
 930  * @action: Index type (&enum queue_index) to perform the action on.
 931  *
 932  * This function will increase the requested index on the queue,
 933  * it will grab the appropriate locks and handle queue overflow events by
 934  * resetting the index to the start of the queue.
 935  */
 936 void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index);
 937
 938
 939 /*
 940  * Interrupt context handlers.
 941  */
 942 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
 943 void rt2x00lib_txdone(struct queue_entry *entry,
 944                       struct txdone_entry_desc *txdesc);
 945 void rt2x00lib_rxdone(struct queue_entry *entry,
 946                       struct rxdone_entry_desc *rxdesc);
 947
 948 /*
 949  * TX descriptor initializer
 950  */
 951 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 952                              struct sk_buff *skb,
 953                              struct ieee80211_tx_control *control);
 954
 955 /*
 956  * mac80211 handlers.
 957  */
 958 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 959                  struct ieee80211_tx_control *control);
 960 int rt2x00mac_start(struct ieee80211_hw *hw);
 961 void rt2x00mac_stop(struct ieee80211_hw *hw);
 962 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
 963                             struct ieee80211_if_init_conf *conf);
 964 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
 965                                 struct ieee80211_if_init_conf *conf);
 966 int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
 967 int rt2x00mac_config_interface(struct ieee80211_hw *hw,
 968                                struct ieee80211_vif *vif,
 969                                struct ieee80211_if_conf *conf);
 970 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
 971                         struct ieee80211_low_level_stats *stats);
 972 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
 973                            struct ieee80211_tx_queue_stats *stats);
 974 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
 975                                 struct ieee80211_vif *vif,
 976                                 struct ieee80211_bss_conf *bss_conf,
 977                                 u32 changes);
 978 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
 979                       const struct ieee80211_tx_queue_params *params);
 980
 981 /*
 982  * Driver allocation handlers.
 983  */
 984 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
 985 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
 986 #ifdef CONFIG_PM
 987 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
 988 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
 989 #endif /* CONFIG_PM */
 990
 991 #endif /* RT2X00_H */