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     "2.1.8"
  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), __func__, __lvl, ##__args)
  57
  58 #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...)  \
  59         printk(__kernlvl "%s -> %s: %s - " __msg,               \
  60                KBUILD_MODNAME, __func__, __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 + DIFS + \
 112                                   (8 * (IEEE80211_HEADER + ACK_SIZE)) )
 113 #define SHORT_EIFS              ( SIFS + SHORT_DIFS + \
 114                                   (8 * (IEEE80211_HEADER + ACK_SIZE)) )
 115
 116 /*
 117  * Chipset identification
 118  * The chipset on the device is composed of a RT and RF chip.
 119  * The chipset combination is important for determining device capabilities.
 120  */
 121 struct rt2x00_chip {
 122         u16 rt;
 123 #define RT2460          0x0101
 124 #define RT2560          0x0201
 125 #define RT2570          0x1201
 126 #define RT2561s         0x0301  /* Turbo */
 127 #define RT2561          0x0302
 128 #define RT2661          0x0401
 129 #define RT2571          0x1300
 130
 131         u16 rf;
 132         u32 rev;
 133 };
 134
 135 /*
 136  * RF register values that belong to a particular channel.
 137  */
 138 struct rf_channel {
 139         int channel;
 140         u32 rf1;
 141         u32 rf2;
 142         u32 rf3;
 143         u32 rf4;
 144 };
 145
 146 /*
 147  * Channel information structure
 148  */
 149 struct channel_info {
 150         unsigned int flags;
 151 #define GEOGRAPHY_ALLOWED       0x00000001
 152
 153         short tx_power1;
 154         short tx_power2;
 155 };
 156
 157 /*
 158  * Antenna setup values.
 159  */
 160 struct antenna_setup {
 161         enum antenna rx;
 162         enum antenna tx;
 163 };
 164
 165 /*
 166  * Quality statistics about the currently active link.
 167  */
 168 struct link_qual {
 169         /*
 170          * Statistics required for Link tuning.
 171          * For the average RSSI value we use the "Walking average" approach.
 172          * When adding RSSI to the average value the following calculation
 173          * is needed:
 174          *
 175          *        avg_rssi = ((avg_rssi * 7) + rssi) / 8;
 176          *
 177          * The advantage of this approach is that we only need 1 variable
 178          * to store the average in (No need for a count and a total).
 179          * But more importantly, normal average values will over time
 180          * move less and less towards newly added values this results
 181          * that with link tuning, the device can have a very good RSSI
 182          * for a few minutes but when the device is moved away from the AP
 183          * the average will not decrease fast enough to compensate.
 184          * The walking average compensates this and will move towards
 185          * the new values correctly allowing a effective link tuning.
 186          */
 187         int avg_rssi;
 188         int false_cca;
 189
 190         /*
 191          * Statistics required for Signal quality calculation.
 192          * For calculating the Signal quality we have to determine
 193          * the total number of success and failed RX and TX frames.
 194          * After that we also use the average RSSI value to help
 195          * determining the signal quality.
 196          * For the calculation we will use the following algorithm:
 197          *
 198          *         rssi_percentage = (avg_rssi * 100) / rssi_offset
 199          *         rx_percentage = (rx_success * 100) / rx_total
 200          *         tx_percentage = (tx_success * 100) / tx_total
 201          *         avg_signal = ((WEIGHT_RSSI * avg_rssi) +
 202          *                       (WEIGHT_TX * tx_percentage) +
 203          *                       (WEIGHT_RX * rx_percentage)) / 100
 204          *
 205          * This value should then be checked to not be greated then 100.
 206          */
 207         int rx_percentage;
 208         int rx_success;
 209         int rx_failed;
 210         int tx_percentage;
 211         int tx_success;
 212         int tx_failed;
 213 #define WEIGHT_RSSI     20
 214 #define WEIGHT_RX       40
 215 #define WEIGHT_TX       40
 216 };
 217
 218 /*
 219  * Antenna settings about the currently active link.
 220  */
 221 struct link_ant {
 222         /*
 223          * Antenna flags
 224          */
 225         unsigned int flags;
 226 #define ANTENNA_RX_DIVERSITY    0x00000001
 227 #define ANTENNA_TX_DIVERSITY    0x00000002
 228 #define ANTENNA_MODE_SAMPLE     0x00000004
 229
 230         /*
 231          * Currently active TX/RX antenna setup.
 232          * When software diversity is used, this will indicate
 233          * which antenna is actually used at this time.
 234          */
 235         struct antenna_setup active;
 236
 237         /*
 238          * RSSI information for the different antenna's.
 239          * These statistics are used to determine when
 240          * to switch antenna when using software diversity.
 241          *
 242          *        rssi[0] -> Antenna A RSSI
 243          *        rssi[1] -> Antenna B RSSI
 244          */
 245         int rssi_history[2];
 246
 247         /*
 248          * Current RSSI average of the currently active antenna.
 249          * Similar to the avg_rssi in the link_qual structure
 250          * this value is updated by using the walking average.
 251          */
 252         int rssi_ant;
 253 };
 254
 255 /*
 256  * To optimize the quality of the link we need to store
 257  * the quality of received frames and periodically
 258  * optimize the link.
 259  */
 260 struct link {
 261         /*
 262          * Link tuner counter
 263          * The number of times the link has been tuned
 264          * since the radio has been switched on.
 265          */
 266         u32 count;
 267
 268         /*
 269          * Quality measurement values.
 270          */
 271         struct link_qual qual;
 272
 273         /*
 274          * TX/RX antenna setup.
 275          */
 276         struct link_ant ant;
 277
 278         /*
 279          * Active VGC level
 280          */
 281         int vgc_level;
 282
 283         /*
 284          * Work structure for scheduling periodic link tuning.
 285          */
 286         struct delayed_work work;
 287 };
 288
 289 /*
 290  * Small helper macro to work with moving/walking averages.
 291  */
 292 #define MOVING_AVERAGE(__avg, __val, __samples) \
 293         ( (((__avg) * ((__samples) - 1)) + (__val)) / (__samples) )
 294
 295 /*
 296  * When we lack RSSI information return something less then -80 to
 297  * tell the driver to tune the device to maximum sensitivity.
 298  */
 299 #define DEFAULT_RSSI    ( -128 )
 300
 301 /*
 302  * Link quality access functions.
 303  */
 304 static inline int rt2x00_get_link_rssi(struct link *link)
 305 {
 306         if (link->qual.avg_rssi && link->qual.rx_success)
 307                 return link->qual.avg_rssi;
 308         return DEFAULT_RSSI;
 309 }
 310
 311 static inline int rt2x00_get_link_ant_rssi(struct link *link)
 312 {
 313         if (link->ant.rssi_ant && link->qual.rx_success)
 314                 return link->ant.rssi_ant;
 315         return DEFAULT_RSSI;
 316 }
 317
 318 static inline void rt2x00_reset_link_ant_rssi(struct link *link)
 319 {
 320         link->ant.rssi_ant = 0;
 321 }
 322
 323 static inline int rt2x00_get_link_ant_rssi_history(struct link *link,
 324                                                    enum antenna ant)
 325 {
 326         if (link->ant.rssi_history[ant - ANTENNA_A])
 327                 return link->ant.rssi_history[ant - ANTENNA_A];
 328         return DEFAULT_RSSI;
 329 }
 330
 331 static inline int rt2x00_update_ant_rssi(struct link *link, int rssi)
 332 {
 333         int old_rssi = link->ant.rssi_history[link->ant.active.rx - ANTENNA_A];
 334         link->ant.rssi_history[link->ant.active.rx - ANTENNA_A] = rssi;
 335         return old_rssi;
 336 }
 337
 338 /*
 339  * Interface structure
 340  * Per interface configuration details, this structure
 341  * is allocated as the private data for ieee80211_vif.
 342  */
 343 struct rt2x00_intf {
 344         /*
 345          * All fields within the rt2x00_intf structure
 346          * must be protected with a spinlock.
 347          */
 348         spinlock_t lock;
 349
 350         /*
 351          * BSS configuration. Copied from the structure
 352          * passed to us through the bss_info_changed()
 353          * callback funtion.
 354          */
 355         struct ieee80211_bss_conf conf;
 356
 357         /*
 358          * MAC of the device.
 359          */
 360         u8 mac[ETH_ALEN];
 361
 362         /*
 363          * BBSID of the AP to associate with.
 364          */
 365         u8 bssid[ETH_ALEN];
 366
 367         /*
 368          * Entry in the beacon queue which belongs to
 369          * this interface. Each interface has its own
 370          * dedicated beacon entry.
 371          */
 372         struct queue_entry *beacon;
 373
 374         /*
 375          * Actions that needed rescheduling.
 376          */
 377         unsigned int delayed_flags;
 378 #define DELAYED_UPDATE_BEACON           0x00000001
 379 #define DELAYED_CONFIG_ERP              0x00000002
 380 #define DELAYED_LED_ASSOC               0x00000004
 381
 382         /*
 383          * Software sequence counter, this is only required
 384          * for hardware which doesn't support hardware
 385          * sequence counting.
 386          */
 387         spinlock_t seqlock;
 388         u16 seqno;
 389 };
 390
 391 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
 392 {
 393         return (struct rt2x00_intf *)vif->drv_priv;
 394 }
 395
 396 /**
 397  * struct hw_mode_spec: Hardware specifications structure
 398  *
 399  * Details about the supported modes, rates and channels
 400  * of a particular chipset. This is used by rt2x00lib
 401  * to build the ieee80211_hw_mode array for mac80211.
 402  *
 403  * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
 404  * @supported_rates: Rate types which are supported (CCK, OFDM).
 405  * @num_channels: Number of supported channels. This is used as array size
 406  *      for @tx_power_a, @tx_power_bg and @channels.
 407  * @channels: Device/chipset specific channel values (See &struct rf_channel).
 408  * @channels_info: Additional information for channels (See &struct channel_info).
 409  */
 410 struct hw_mode_spec {
 411         unsigned int supported_bands;
 412 #define SUPPORT_BAND_2GHZ       0x00000001
 413 #define SUPPORT_BAND_5GHZ       0x00000002
 414
 415         unsigned int supported_rates;
 416 #define SUPPORT_RATE_CCK        0x00000001
 417 #define SUPPORT_RATE_OFDM       0x00000002
 418
 419         unsigned int num_channels;
 420         const struct rf_channel *channels;
 421         const struct channel_info *channels_info;
 422 };
 423
 424 /*
 425  * Configuration structure wrapper around the
 426  * mac80211 configuration structure.
 427  * When mac80211 configures the driver, rt2x00lib
 428  * can precalculate values which are equal for all
 429  * rt2x00 drivers. Those values can be stored in here.
 430  */
 431 struct rt2x00lib_conf {
 432         struct ieee80211_conf *conf;
 433
 434         struct rf_channel rf;
 435         struct channel_info channel;
 436
 437         struct antenna_setup ant;
 438
 439         enum ieee80211_band band;
 440
 441         u32 basic_rates;
 442         u32 slot_time;
 443
 444         short sifs;
 445         short pifs;
 446         short difs;
 447         short eifs;
 448 };
 449
 450 /*
 451  * Configuration structure for erp settings.
 452  */
 453 struct rt2x00lib_erp {
 454         int short_preamble;
 455         int cts_protection;
 456
 457         int ack_timeout;
 458         int ack_consume_time;
 459 };
 460
 461 /*
 462  * Configuration structure for hardware encryption.
 463  */
 464 struct rt2x00lib_crypto {
 465         enum cipher cipher;
 466
 467         enum set_key_cmd cmd;
 468         const u8 *address;
 469
 470         u32 bssidx;
 471         u32 aid;
 472
 473         u8 key[16];
 474         u8 tx_mic[8];
 475         u8 rx_mic[8];
 476 };
 477
 478 /*
 479  * Configuration structure wrapper around the
 480  * rt2x00 interface configuration handler.
 481  */
 482 struct rt2x00intf_conf {
 483         /*
 484          * Interface type
 485          */
 486         enum ieee80211_if_types type;
 487
 488         /*
 489          * TSF sync value, this is dependant on the operation type.
 490          */
 491         enum tsf_sync sync;
 492
 493         /*
 494          * The MAC and BSSID addressess are simple array of bytes,
 495          * these arrays are little endian, so when sending the addressess
 496          * to the drivers, copy the it into a endian-signed variable.
 497          *
 498          * Note that all devices (except rt2500usb) have 32 bits
 499          * register word sizes. This means that whatever variable we
 500          * pass _must_ be a multiple of 32 bits. Otherwise the device
 501          * might not accept what we are sending to it.
 502          * This will also make it easier for the driver to write
 503          * the data to the device.
 504          */
 505         __le32 mac[2];
 506         __le32 bssid[2];
 507 };
 508
 509 /*
 510  * rt2x00lib callback functions.
 511  */
 512 struct rt2x00lib_ops {
 513         /*
 514          * Interrupt handlers.
 515          */
 516         irq_handler_t irq_handler;
 517
 518         /*
 519          * Device init handlers.
 520          */
 521         int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
 522         char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
 523         u16 (*get_firmware_crc) (const void *data, const size_t len);
 524         int (*load_firmware) (struct rt2x00_dev *rt2x00dev, const void *data,
 525                               const size_t len);
 526
 527         /*
 528          * Device initialization/deinitialization handlers.
 529          */
 530         int (*initialize) (struct rt2x00_dev *rt2x00dev);
 531         void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 532
 533         /*
 534          * queue initialization handlers
 535          */
 536         void (*init_rxentry) (struct rt2x00_dev *rt2x00dev,
 537                               struct queue_entry *entry);
 538         void (*init_txentry) (struct rt2x00_dev *rt2x00dev,
 539                               struct queue_entry *entry);
 540
 541         /*
 542          * Radio control handlers.
 543          */
 544         int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
 545                                  enum dev_state state);
 546         int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
 547         void (*link_stats) (struct rt2x00_dev *rt2x00dev,
 548                             struct link_qual *qual);
 549         void (*reset_tuner) (struct rt2x00_dev *rt2x00dev);
 550         void (*link_tuner) (struct rt2x00_dev *rt2x00dev);
 551
 552         /*
 553          * TX control handlers
 554          */
 555         void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
 556                                struct sk_buff *skb,
 557                                struct txentry_desc *txdesc);
 558         int (*write_tx_data) (struct queue_entry *entry);
 559         void (*write_beacon) (struct queue_entry *entry);
 560         int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev,
 561                                 struct sk_buff *skb);
 562         void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
 563                                const enum data_queue_qid queue);
 564
 565         /*
 566          * RX control handlers
 567          */
 568         void (*fill_rxdone) (struct queue_entry *entry,
 569                              struct rxdone_entry_desc *rxdesc);
 570
 571         /*
 572          * Configuration handlers.
 573          */
 574         int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
 575                                   struct rt2x00lib_crypto *crypto,
 576                                   struct ieee80211_key_conf *key);
 577         int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
 578                                     struct rt2x00lib_crypto *crypto,
 579                                     struct ieee80211_key_conf *key);
 580         void (*config_filter) (struct rt2x00_dev *rt2x00dev,
 581                                const unsigned int filter_flags);
 582         void (*config_intf) (struct rt2x00_dev *rt2x00dev,
 583                              struct rt2x00_intf *intf,
 584                              struct rt2x00intf_conf *conf,
 585                              const unsigned int flags);
 586 #define CONFIG_UPDATE_TYPE              ( 1 << 1 )
 587 #define CONFIG_UPDATE_MAC               ( 1 << 2 )
 588 #define CONFIG_UPDATE_BSSID             ( 1 << 3 )
 589
 590         void (*config_erp) (struct rt2x00_dev *rt2x00dev,
 591                             struct rt2x00lib_erp *erp);
 592         void (*config) (struct rt2x00_dev *rt2x00dev,
 593                         struct rt2x00lib_conf *libconf,
 594                         const unsigned int flags);
 595 #define CONFIG_UPDATE_PHYMODE           ( 1 << 1 )
 596 #define CONFIG_UPDATE_CHANNEL           ( 1 << 2 )
 597 #define CONFIG_UPDATE_TXPOWER           ( 1 << 3 )
 598 #define CONFIG_UPDATE_ANTENNA           ( 1 << 4 )
 599 #define CONFIG_UPDATE_SLOT_TIME         ( 1 << 5 )
 600 #define CONFIG_UPDATE_BEACON_INT        ( 1 << 6 )
 601 #define CONFIG_UPDATE_ALL               0xffff
 602 };
 603
 604 /*
 605  * rt2x00 driver callback operation structure.
 606  */
 607 struct rt2x00_ops {
 608         const char *name;
 609         const unsigned int max_sta_intf;
 610         const unsigned int max_ap_intf;
 611         const unsigned int eeprom_size;
 612         const unsigned int rf_size;
 613         const unsigned int tx_queues;
 614         const struct data_queue_desc *rx;
 615         const struct data_queue_desc *tx;
 616         const struct data_queue_desc *bcn;
 617         const struct data_queue_desc *atim;
 618         const struct rt2x00lib_ops *lib;
 619         const struct ieee80211_ops *hw;
 620 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 621         const struct rt2x00debug *debugfs;
 622 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 623 };
 624
 625 /*
 626  * rt2x00 device flags
 627  */
 628 enum rt2x00_flags {
 629         /*
 630          * Device state flags
 631          */
 632         DEVICE_PRESENT,
 633         DEVICE_REGISTERED_HW,
 634         DEVICE_INITIALIZED,
 635         DEVICE_STARTED,
 636         DEVICE_STARTED_SUSPEND,
 637         DEVICE_ENABLED_RADIO,
 638         DEVICE_DISABLED_RADIO_HW,
 639         DEVICE_DIRTY_CONFIG,
 640
 641         /*
 642          * Driver requirements
 643          */
 644         DRIVER_REQUIRE_FIRMWARE,
 645         DRIVER_REQUIRE_BEACON_GUARD,
 646         DRIVER_REQUIRE_ATIM_QUEUE,
 647         DRIVER_REQUIRE_SCHEDULED,
 648         DRIVER_REQUIRE_DMA,
 649
 650         /*
 651          * Driver features
 652          */
 653         CONFIG_SUPPORT_HW_BUTTON,
 654         CONFIG_SUPPORT_HW_CRYPTO,
 655
 656         /*
 657          * Driver configuration
 658          */
 659         CONFIG_FRAME_TYPE,
 660         CONFIG_RF_SEQUENCE,
 661         CONFIG_EXTERNAL_LNA_A,
 662         CONFIG_EXTERNAL_LNA_BG,
 663         CONFIG_DOUBLE_ANTENNA,
 664         CONFIG_DISABLE_LINK_TUNING,
 665 };
 666
 667 /*
 668  * rt2x00 device structure.
 669  */
 670 struct rt2x00_dev {
 671         /*
 672          * Device structure.
 673          * The structure stored in here depends on the
 674          * system bus (PCI or USB).
 675          * When accessing this variable, the rt2x00dev_{pci,usb}
 676          * macro's should be used for correct typecasting.
 677          */
 678         struct device *dev;
 679
 680         /*
 681          * Callback functions.
 682          */
 683         const struct rt2x00_ops *ops;
 684
 685         /*
 686          * IEEE80211 control structure.
 687          */
 688         struct ieee80211_hw *hw;
 689         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 690         enum ieee80211_band curr_band;
 691
 692         /*
 693          * rfkill structure for RF state switching support.
 694          * This will only be compiled in when required.
 695          */
 696 #ifdef CONFIG_RT2X00_LIB_RFKILL
 697         unsigned long rfkill_state;
 698 #define RFKILL_STATE_ALLOCATED          1
 699 #define RFKILL_STATE_REGISTERED         2
 700         struct rfkill *rfkill;
 701         struct delayed_work rfkill_work;
 702 #endif /* CONFIG_RT2X00_LIB_RFKILL */
 703
 704         /*
 705          * If enabled, the debugfs interface structures
 706          * required for deregistration of debugfs.
 707          */
 708 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 709         struct rt2x00debug_intf *debugfs_intf;
 710 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 711
 712         /*
 713          * LED structure for changing the LED status
 714          * by mac8011 or the kernel.
 715          */
 716 #ifdef CONFIG_RT2X00_LIB_LEDS
 717         struct rt2x00_led led_radio;
 718         struct rt2x00_led led_assoc;
 719         struct rt2x00_led led_qual;
 720         u16 led_mcu_reg;
 721 #endif /* CONFIG_RT2X00_LIB_LEDS */
 722
 723         /*
 724          * Device flags.
 725          * In these flags the current status and some
 726          * of the device capabilities are stored.
 727          */
 728         unsigned long flags;
 729
 730         /*
 731          * Chipset identification.
 732          */
 733         struct rt2x00_chip chip;
 734
 735         /*
 736          * hw capability specifications.
 737          */
 738         struct hw_mode_spec spec;
 739
 740         /*
 741          * This is the default TX/RX antenna setup as indicated
 742          * by the device's EEPROM. When mac80211 sets its
 743          * antenna value to 0 we should be using these values.
 744          */
 745         struct antenna_setup default_ant;
 746
 747         /*
 748          * Register pointers
 749          * csr.base: CSR base register address. (PCI)
 750          * csr.cache: CSR cache for usb_control_msg. (USB)
 751          */
 752         union csr {
 753                 void __iomem *base;
 754                 void *cache;
 755         } csr;
 756
 757         /*
 758          * Mutex to protect register accesses on USB devices.
 759          * There are 2 reasons this is needed, one is to ensure
 760          * use of the csr_cache (for USB devices) by one thread
 761          * isn't corrupted by another thread trying to access it.
 762          * The other is that access to BBP and RF registers
 763          * require multiple BUS transactions and if another thread
 764          * attempted to access one of those registers at the same
 765          * time one of the writes could silently fail.
 766          */
 767         struct mutex usb_cache_mutex;
 768
 769         /*
 770          * Current packet filter configuration for the device.
 771          * This contains all currently active FIF_* flags send
 772          * to us by mac80211 during configure_filter().
 773          */
 774         unsigned int packet_filter;
 775
 776         /*
 777          * Interface details:
 778          *  - Open ap interface count.
 779          *  - Open sta interface count.
 780          *  - Association count.
 781          */
 782         unsigned int intf_ap_count;
 783         unsigned int intf_sta_count;
 784         unsigned int intf_associated;
 785
 786         /*
 787          * Link quality
 788          */
 789         struct link link;
 790
 791         /*
 792          * EEPROM data.
 793          */
 794         __le16 *eeprom;
 795
 796         /*
 797          * Active RF register values.
 798          * These are stored here so we don't need
 799          * to read the rf registers and can directly
 800          * use this value instead.
 801          * This field should be accessed by using
 802          * rt2x00_rf_read() and rt2x00_rf_write().
 803          */
 804         u32 *rf;
 805
 806         /*
 807          * USB Max frame size (for rt2500usb & rt73usb).
 808          */
 809         u16 usb_maxpacket;
 810
 811         /*
 812          * Current TX power value.
 813          */
 814         u16 tx_power;
 815
 816         /*
 817          * Rssi <-> Dbm offset
 818          */
 819         u8 rssi_offset;
 820
 821         /*
 822          * Frequency offset (for rt61pci & rt73usb).
 823          */
 824         u8 freq_offset;
 825
 826         /*
 827          * Low level statistics which will have
 828          * to be kept up to date while device is running.
 829          */
 830         struct ieee80211_low_level_stats low_level_stats;
 831
 832         /*
 833          * RX configuration information.
 834          */
 835         struct ieee80211_rx_status rx_status;
 836
 837         /*
 838          * Scheduled work.
 839          * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
 840          * which means it cannot be placed on the hw->workqueue
 841          * due to RTNL locking requirements.
 842          */
 843         struct work_struct intf_work;
 844         struct work_struct filter_work;
 845
 846         /*
 847          * Data queue arrays for RX, TX and Beacon.
 848          * The Beacon array also contains the Atim queue
 849          * if that is supported by the device.
 850          */
 851         unsigned int data_queues;
 852         struct data_queue *rx;
 853         struct data_queue *tx;
 854         struct data_queue *bcn;
 855
 856         /*
 857          * Firmware image.
 858          */
 859         const struct firmware *fw;
 860 };
 861
 862 /*
 863  * Generic RF access.
 864  * The RF is being accessed by word index.
 865  */
 866 static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
 867                                   const unsigned int word, u32 *data)
 868 {
 869         *data = rt2x00dev->rf[word];
 870 }
 871
 872 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
 873                                    const unsigned int word, u32 data)
 874 {
 875         rt2x00dev->rf[word] = data;
 876 }
 877
 878 /*
 879  *  Generic EEPROM access.
 880  * The EEPROM is being accessed by word index.
 881  */
 882 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
 883                                        const unsigned int word)
 884 {
 885         return (void *)&rt2x00dev->eeprom[word];
 886 }
 887
 888 static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
 889                                       const unsigned int word, u16 *data)
 890 {
 891         *data = le16_to_cpu(rt2x00dev->eeprom[word]);
 892 }
 893
 894 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
 895                                        const unsigned int word, u16 data)
 896 {
 897         rt2x00dev->eeprom[word] = cpu_to_le16(data);
 898 }
 899
 900 /*
 901  * Chipset handlers
 902  */
 903 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
 904                                    const u16 rt, const u16 rf, const u32 rev)
 905 {
 906         INFO(rt2x00dev,
 907              "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n",
 908              rt, rf, rev);
 909
 910         rt2x00dev->chip.rt = rt;
 911         rt2x00dev->chip.rf = rf;
 912         rt2x00dev->chip.rev = rev;
 913 }
 914
 915 static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip)
 916 {
 917         return (chipset->rt == chip);
 918 }
 919
 920 static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip)
 921 {
 922         return (chipset->rf == chip);
 923 }
 924
 925 static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset)
 926 {
 927         return chipset->rev;
 928 }
 929
 930 static inline u16 rt2x00_check_rev(const struct rt2x00_chip *chipset,
 931                                    const u32 rev)
 932 {
 933         return (((chipset->rev & 0xffff0) == rev) &&
 934                 !!(chipset->rev & 0x0000f));
 935 }
 936
 937 /*
 938  * Duration calculations
 939  * The rate variable passed is: 100kbs.
 940  * To convert from bytes to bits we multiply size with 8,
 941  * then the size is multiplied with 10 to make the
 942  * real rate -> rate argument correction.
 943  */
 944 static inline u16 get_duration(const unsigned int size, const u8 rate)
 945 {
 946         return ((size * 8 * 10) / rate);
 947 }
 948
 949 static inline u16 get_duration_res(const unsigned int size, const u8 rate)
 950 {
 951         return ((size * 8 * 10) % rate);
 952 }
 953
 954 /**
 955  * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
 956  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 957  * @skb: The skb to map.
 958  */
 959 void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
 960
 961 /**
 962  * rt2x00queue_get_queue - Convert queue index to queue pointer
 963  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 964  * @queue: rt2x00 queue index (see &enum data_queue_qid).
 965  */
 966 struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
 967                                          const enum data_queue_qid queue);
 968
 969 /**
 970  * rt2x00queue_get_entry - Get queue entry where the given index points to.
 971  * @queue: Pointer to &struct data_queue from where we obtain the entry.
 972  * @index: Index identifier for obtaining the correct index.
 973  */
 974 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
 975                                           enum queue_index index);
 976
 977 /*
 978  * Interrupt context handlers.
 979  */
 980 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
 981 void rt2x00lib_txdone(struct queue_entry *entry,
 982                       struct txdone_entry_desc *txdesc);
 983 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
 984                       struct queue_entry *entry);
 985
 986 /*
 987  * mac80211 handlers.
 988  */
 989 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
 990 int rt2x00mac_start(struct ieee80211_hw *hw);
 991 void rt2x00mac_stop(struct ieee80211_hw *hw);
 992 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
 993                             struct ieee80211_if_init_conf *conf);
 994 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
 995                                 struct ieee80211_if_init_conf *conf);
 996 int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
 997 int rt2x00mac_config_interface(struct ieee80211_hw *hw,
 998                                struct ieee80211_vif *vif,
 999                                struct ieee80211_if_conf *conf);
1000 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1001                                 unsigned int changed_flags,
1002                                 unsigned int *total_flags,
1003                                 int mc_count, struct dev_addr_list *mc_list);
1004 #ifdef CONFIG_RT2X00_LIB_CRYPTO
1005 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1006                       const u8 *local_address, const u8 *address,
1007                       struct ieee80211_key_conf *key);
1008 #else
1009 #define rt2x00mac_set_key       NULL
1010 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
1011 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1012                         struct ieee80211_low_level_stats *stats);
1013 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
1014                            struct ieee80211_tx_queue_stats *stats);
1015 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1016                                 struct ieee80211_vif *vif,
1017                                 struct ieee80211_bss_conf *bss_conf,
1018                                 u32 changes);
1019 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1020                       const struct ieee80211_tx_queue_params *params);
1021
1022 /*
1023  * Driver allocation handlers.
1024  */
1025 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1026 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1027 #ifdef CONFIG_PM
1028 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1029 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1030 #endif /* CONFIG_PM */
1031
1032 #endif /* RT2X00_H */