drivers/net/wireless/rt2x00/rt2x00.h

   1 /*
   2         Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
   3         Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
   4         <http://rt2x00.serialmonkey.com>
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14         GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public License
  17         along with this program; if not, write to the
  18         Free Software Foundation, Inc.,
  19         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 /*
  23         Module: rt2x00
  24         Abstract: rt2x00 global information.
  25  */
  26
  27 #ifndef RT2X00_H
  28 #define RT2X00_H
  29
  30 #include <linux/bitops.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/workqueue.h>
  33 #include <linux/firmware.h>
  34 #include <linux/leds.h>
  35 #include <linux/mutex.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/input-polldev.h>
  38
  39 #include <net/mac80211.h>
  40
  41 #include "rt2x00debug.h"
  42 #include "rt2x00leds.h"
  43 #include "rt2x00reg.h"
  44 #include "rt2x00queue.h"
  45
  46 /*
  47  * Module information.
  48  */
  49 #define DRV_VERSION     "2.3.0"
  50 #define DRV_PROJECT     "http://rt2x00.serialmonkey.com"
  51
  52 /*
  53  * Debug definitions.
  54  * Debug output has to be enabled during compile time.
  55  */
  56 #define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...)     \
  57         printk(__kernlvl "%s -> %s: %s - " __msg,                       \
  58                wiphy_name((__dev)->hw->wiphy), __func__, __lvl, ##__args)
  59
  60 #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...)  \
  61         printk(__kernlvl "%s -> %s: %s - " __msg,               \
  62                KBUILD_MODNAME, __func__, __lvl, ##__args)
  63
  64 #ifdef CONFIG_RT2X00_DEBUG
  65 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  66         DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args);
  67 #else
  68 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  69         do { } while (0)
  70 #endif /* CONFIG_RT2X00_DEBUG */
  71
  72 /*
  73  * Various debug levels.
  74  * The debug levels PANIC and ERROR both indicate serious problems,
  75  * for this reason they should never be ignored.
  76  * The special ERROR_PROBE message is for messages that are generated
  77  * when the rt2x00_dev is not yet initialized.
  78  */
  79 #define PANIC(__dev, __msg, __args...) \
  80         DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args)
  81 #define ERROR(__dev, __msg, __args...)  \
  82         DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args)
  83 #define ERROR_PROBE(__msg, __args...) \
  84         DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args)
  85 #define WARNING(__dev, __msg, __args...) \
  86         DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args)
  87 #define NOTICE(__dev, __msg, __args...) \
  88         DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args)
  89 #define INFO(__dev, __msg, __args...) \
  90         DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args)
  91 #define DEBUG(__dev, __msg, __args...) \
  92         DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args)
  93 #define EEPROM(__dev, __msg, __args...) \
  94         DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args)
  95
  96 /*
  97  * Duration calculations
  98  * The rate variable passed is: 100kbs.
  99  * To convert from bytes to bits we multiply size with 8,
 100  * then the size is multiplied with 10 to make the
 101  * real rate -> rate argument correction.
 102  */
 103 #define GET_DURATION(__size, __rate)    (((__size) * 8 * 10) / (__rate))
 104 #define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
 105
 106 /*
 107  * Determine the number of L2 padding bytes required between the header and
 108  * the payload.
 109  */
 110 #define L2PAD_SIZE(__hdrlen)    (-(__hdrlen) & 3)
 111
 112 /*
 113  * Determine the alignment requirement,
 114  * to make sure the 802.11 payload is padded to a 4-byte boundrary
 115  * we must determine the address of the payload and calculate the
 116  * amount of bytes needed to move the data.
 117  */
 118 #define ALIGN_SIZE(__skb, __header) \
 119         (  ((unsigned long)((__skb)->data + (__header))) & 3 )
 120
 121 /*
 122  * Constants for extra TX headroom for alignment purposes.
 123  */
 124 #define RT2X00_ALIGN_SIZE       4 /* Only whole frame needs alignment */
 125 #define RT2X00_L2PAD_SIZE       8 /* Both header & payload need alignment */
 126
 127 /*
 128  * Standard timing and size defines.
 129  * These values should follow the ieee80211 specifications.
 130  */
 131 #define ACK_SIZE                14
 132 #define IEEE80211_HEADER        24
 133 #define PLCP                    48
 134 #define BEACON                  100
 135 #define PREAMBLE                144
 136 #define SHORT_PREAMBLE          72
 137 #define SLOT_TIME               20
 138 #define SHORT_SLOT_TIME         9
 139 #define SIFS                    10
 140 #define PIFS                    ( SIFS + SLOT_TIME )
 141 #define SHORT_PIFS              ( SIFS + SHORT_SLOT_TIME )
 142 #define DIFS                    ( PIFS + SLOT_TIME )
 143 #define SHORT_DIFS              ( SHORT_PIFS + SHORT_SLOT_TIME )
 144 #define EIFS                    ( SIFS + DIFS + \
 145                                   GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
 146 #define SHORT_EIFS              ( SIFS + SHORT_DIFS + \
 147                                   GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
 148
 149 /*
 150  * Structure for average calculation
 151  * The avg field contains the actual average value,
 152  * but avg_weight is internally used during calculations
 153  * to prevent rounding errors.
 154  */
 155 struct avg_val {
 156         int avg;
 157         int avg_weight;
 158 };
 159
 160 enum rt2x00_chip_intf {
 161         RT2X00_CHIP_INTF_PCI,
 162         RT2X00_CHIP_INTF_USB,
 163         RT2X00_CHIP_INTF_SOC,
 164 };
 165
 166 /*
 167  * Chipset identification
 168  * The chipset on the device is composed of a RT and RF chip.
 169  * The chipset combination is important for determining device capabilities.
 170  */
 171 struct rt2x00_chip {
 172         u16 rt;
 173 #define RT2460          0x2460
 174 #define RT2560          0x2560
 175 #define RT2570          0x2570
 176 #define RT2661          0x2661
 177 #define RT2573          0x2573
 178 #define RT2860          0x2860  /* 2.4GHz PCI/CB */
 179 #define RT2870          0x2870
 180 #define RT2872          0x2872  /* WSOC */
 181 #define RT2883          0x2883  /* WSOC */
 182 #define RT3070          0x3070
 183 #define RT3071          0x3071
 184 #define RT3090          0x3090  /* 2.4GHz PCIe */
 185 #define RT3390          0x3390
 186 #define RT3572          0x3572
 187 #define RT3593          0x3593  /* PCIe */
 188 #define RT3883          0x3883  /* WSOC */
 189
 190         u16 rf;
 191         u16 rev;
 192
 193         enum rt2x00_chip_intf intf;
 194 };
 195
 196 /*
 197  * RF register values that belong to a particular channel.
 198  */
 199 struct rf_channel {
 200         int channel;
 201         u32 rf1;
 202         u32 rf2;
 203         u32 rf3;
 204         u32 rf4;
 205 };
 206
 207 /*
 208  * Channel information structure
 209  */
 210 struct channel_info {
 211         unsigned int flags;
 212 #define GEOGRAPHY_ALLOWED       0x00000001
 213
 214         short tx_power1;
 215         short tx_power2;
 216 };
 217
 218 /*
 219  * Antenna setup values.
 220  */
 221 struct antenna_setup {
 222         enum antenna rx;
 223         enum antenna tx;
 224 };
 225
 226 /*
 227  * Quality statistics about the currently active link.
 228  */
 229 struct link_qual {
 230         /*
 231          * Statistics required for Link tuning by driver
 232          * The rssi value is provided by rt2x00lib during the
 233          * link_tuner() callback function.
 234          * The false_cca field is filled during the link_stats()
 235          * callback function and could be used during the
 236          * link_tuner() callback function.
 237          */
 238         int rssi;
 239         int false_cca;
 240
 241         /*
 242          * VGC levels
 243          * Hardware driver will tune the VGC level during each call
 244          * to the link_tuner() callback function. This vgc_level is
 245          * is determined based on the link quality statistics like
 246          * average RSSI and the false CCA count.
 247          *
 248          * In some cases the drivers need to differentiate between
 249          * the currently "desired" VGC level and the level configured
 250          * in the hardware. The latter is important to reduce the
 251          * number of BBP register reads to reduce register access
 252          * overhead. For this reason we store both values here.
 253          */
 254         u8 vgc_level;
 255         u8 vgc_level_reg;
 256
 257         /*
 258          * Statistics required for Signal quality calculation.
 259          * These fields might be changed during the link_stats()
 260          * callback function.
 261          */
 262         int rx_success;
 263         int rx_failed;
 264         int tx_success;
 265         int tx_failed;
 266 };
 267
 268 /*
 269  * Antenna settings about the currently active link.
 270  */
 271 struct link_ant {
 272         /*
 273          * Antenna flags
 274          */
 275         unsigned int flags;
 276 #define ANTENNA_RX_DIVERSITY    0x00000001
 277 #define ANTENNA_TX_DIVERSITY    0x00000002
 278 #define ANTENNA_MODE_SAMPLE     0x00000004
 279
 280         /*
 281          * Currently active TX/RX antenna setup.
 282          * When software diversity is used, this will indicate
 283          * which antenna is actually used at this time.
 284          */
 285         struct antenna_setup active;
 286
 287         /*
 288          * RSSI history information for the antenna.
 289          * Used to determine when to switch antenna
 290          * when using software diversity.
 291          */
 292         int rssi_history;
 293
 294         /*
 295          * Current RSSI average of the currently active antenna.
 296          * Similar to the avg_rssi in the link_qual structure
 297          * this value is updated by using the walking average.
 298          */
 299         struct avg_val rssi_ant;
 300 };
 301
 302 /*
 303  * To optimize the quality of the link we need to store
 304  * the quality of received frames and periodically
 305  * optimize the link.
 306  */
 307 struct link {
 308         /*
 309          * Link tuner counter
 310          * The number of times the link has been tuned
 311          * since the radio has been switched on.
 312          */
 313         u32 count;
 314
 315         /*
 316          * Quality measurement values.
 317          */
 318         struct link_qual qual;
 319
 320         /*
 321          * TX/RX antenna setup.
 322          */
 323         struct link_ant ant;
 324
 325         /*
 326          * Currently active average RSSI value
 327          */
 328         struct avg_val avg_rssi;
 329
 330         /*
 331          * Work structure for scheduling periodic link tuning.
 332          */
 333         struct delayed_work work;
 334 };
 335
 336 /*
 337  * Interface structure
 338  * Per interface configuration details, this structure
 339  * is allocated as the private data for ieee80211_vif.
 340  */
 341 struct rt2x00_intf {
 342         /*
 343          * All fields within the rt2x00_intf structure
 344          * must be protected with a spinlock.
 345          */
 346         spinlock_t lock;
 347
 348         /*
 349          * MAC of the device.
 350          */
 351         u8 mac[ETH_ALEN];
 352
 353         /*
 354          * BBSID of the AP to associate with.
 355          */
 356         u8 bssid[ETH_ALEN];
 357
 358         /*
 359          * beacon->skb must be protected with the mutex.
 360          */
 361         struct mutex beacon_skb_mutex;
 362
 363         /*
 364          * Entry in the beacon queue which belongs to
 365          * this interface. Each interface has its own
 366          * dedicated beacon entry.
 367          */
 368         struct queue_entry *beacon;
 369
 370         /*
 371          * Actions that needed rescheduling.
 372          */
 373         unsigned int delayed_flags;
 374 #define DELAYED_UPDATE_BEACON           0x00000001
 375
 376         /*
 377          * Software sequence counter, this is only required
 378          * for hardware which doesn't support hardware
 379          * sequence counting.
 380          */
 381         spinlock_t seqlock;
 382         u16 seqno;
 383 };
 384
 385 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
 386 {
 387         return (struct rt2x00_intf *)vif->drv_priv;
 388 }
 389
 390 /**
 391  * struct hw_mode_spec: Hardware specifications structure
 392  *
 393  * Details about the supported modes, rates and channels
 394  * of a particular chipset. This is used by rt2x00lib
 395  * to build the ieee80211_hw_mode array for mac80211.
 396  *
 397  * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
 398  * @supported_rates: Rate types which are supported (CCK, OFDM).
 399  * @num_channels: Number of supported channels. This is used as array size
 400  *      for @tx_power_a, @tx_power_bg and @channels.
 401  * @channels: Device/chipset specific channel values (See &struct rf_channel).
 402  * @channels_info: Additional information for channels (See &struct channel_info).
 403  * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
 404  */
 405 struct hw_mode_spec {
 406         unsigned int supported_bands;
 407 #define SUPPORT_BAND_2GHZ       0x00000001
 408 #define SUPPORT_BAND_5GHZ       0x00000002
 409
 410         unsigned int supported_rates;
 411 #define SUPPORT_RATE_CCK        0x00000001
 412 #define SUPPORT_RATE_OFDM       0x00000002
 413
 414         unsigned int num_channels;
 415         const struct rf_channel *channels;
 416         const struct channel_info *channels_info;
 417
 418         struct ieee80211_sta_ht_cap ht;
 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
 431         struct rf_channel rf;
 432         struct channel_info channel;
 433 };
 434
 435 /*
 436  * Configuration structure for erp settings.
 437  */
 438 struct rt2x00lib_erp {
 439         int short_preamble;
 440         int cts_protection;
 441
 442         u32 basic_rates;
 443
 444         int slot_time;
 445
 446         short sifs;
 447         short pifs;
 448         short difs;
 449         short eifs;
 450
 451         u16 beacon_int;
 452 };
 453
 454 /*
 455  * Configuration structure for hardware encryption.
 456  */
 457 struct rt2x00lib_crypto {
 458         enum cipher cipher;
 459
 460         enum set_key_cmd cmd;
 461         const u8 *address;
 462
 463         u32 bssidx;
 464         u32 aid;
 465
 466         u8 key[16];
 467         u8 tx_mic[8];
 468         u8 rx_mic[8];
 469 };
 470
 471 /*
 472  * Configuration structure wrapper around the
 473  * rt2x00 interface configuration handler.
 474  */
 475 struct rt2x00intf_conf {
 476         /*
 477          * Interface type
 478          */
 479         enum nl80211_iftype type;
 480
 481         /*
 482          * TSF sync value, this is dependant on the operation type.
 483          */
 484         enum tsf_sync sync;
 485
 486         /*
 487          * The MAC and BSSID addressess are simple array of bytes,
 488          * these arrays are little endian, so when sending the addressess
 489          * to the drivers, copy the it into a endian-signed variable.
 490          *
 491          * Note that all devices (except rt2500usb) have 32 bits
 492          * register word sizes. This means that whatever variable we
 493          * pass _must_ be a multiple of 32 bits. Otherwise the device
 494          * might not accept what we are sending to it.
 495          * This will also make it easier for the driver to write
 496          * the data to the device.
 497          */
 498         __le32 mac[2];
 499         __le32 bssid[2];
 500 };
 501
 502 /*
 503  * rt2x00lib callback functions.
 504  */
 505 struct rt2x00lib_ops {
 506         /*
 507          * Interrupt handlers.
 508          */
 509         irq_handler_t irq_handler;
 510
 511         /*
 512          * Device init handlers.
 513          */
 514         int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
 515         char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
 516         int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
 517                                const u8 *data, const size_t len);
 518         int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
 519                               const u8 *data, const size_t len);
 520
 521         /*
 522          * Device initialization/deinitialization handlers.
 523          */
 524         int (*initialize) (struct rt2x00_dev *rt2x00dev);
 525         void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 526
 527         /*
 528          * queue initialization handlers
 529          */
 530         bool (*get_entry_state) (struct queue_entry *entry);
 531         void (*clear_entry) (struct queue_entry *entry);
 532
 533         /*
 534          * Radio control handlers.
 535          */
 536         int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
 537                                  enum dev_state state);
 538         int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
 539         void (*link_stats) (struct rt2x00_dev *rt2x00dev,
 540                             struct link_qual *qual);
 541         void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
 542                              struct link_qual *qual);
 543         void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
 544                             struct link_qual *qual, const u32 count);
 545
 546         /*
 547          * TX control handlers
 548          */
 549         void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
 550                                struct sk_buff *skb,
 551                                struct txentry_desc *txdesc);
 552         int (*write_tx_data) (struct queue_entry *entry,
 553                               struct txentry_desc *txdesc);
 554         void (*write_beacon) (struct queue_entry *entry,
 555                               struct txentry_desc *txdesc);
 556         int (*get_tx_data_len) (struct queue_entry *entry);
 557         void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
 558                                const enum data_queue_qid queue);
 559         void (*kill_tx_queue) (struct rt2x00_dev *rt2x00dev,
 560                                const enum data_queue_qid queue);
 561
 562         /*
 563          * RX control handlers
 564          */
 565         void (*fill_rxdone) (struct queue_entry *entry,
 566                              struct rxdone_entry_desc *rxdesc);
 567
 568         /*
 569          * Configuration handlers.
 570          */
 571         int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
 572                                   struct rt2x00lib_crypto *crypto,
 573                                   struct ieee80211_key_conf *key);
 574         int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
 575                                     struct rt2x00lib_crypto *crypto,
 576                                     struct ieee80211_key_conf *key);
 577         void (*config_filter) (struct rt2x00_dev *rt2x00dev,
 578                                const unsigned int filter_flags);
 579         void (*config_intf) (struct rt2x00_dev *rt2x00dev,
 580                              struct rt2x00_intf *intf,
 581                              struct rt2x00intf_conf *conf,
 582                              const unsigned int flags);
 583 #define CONFIG_UPDATE_TYPE              ( 1 << 1 )
 584 #define CONFIG_UPDATE_MAC               ( 1 << 2 )
 585 #define CONFIG_UPDATE_BSSID             ( 1 << 3 )
 586
 587         void (*config_erp) (struct rt2x00_dev *rt2x00dev,
 588                             struct rt2x00lib_erp *erp);
 589         void (*config_ant) (struct rt2x00_dev *rt2x00dev,
 590                             struct antenna_setup *ant);
 591         void (*config) (struct rt2x00_dev *rt2x00dev,
 592                         struct rt2x00lib_conf *libconf,
 593                         const unsigned int changed_flags);
 594 };
 595
 596 /*
 597  * rt2x00 driver callback operation structure.
 598  */
 599 struct rt2x00_ops {
 600         const char *name;
 601         const unsigned int max_sta_intf;
 602         const unsigned int max_ap_intf;
 603         const unsigned int eeprom_size;
 604         const unsigned int rf_size;
 605         const unsigned int tx_queues;
 606         const unsigned int extra_tx_headroom;
 607         const struct data_queue_desc *rx;
 608         const struct data_queue_desc *tx;
 609         const struct data_queue_desc *bcn;
 610         const struct data_queue_desc *atim;
 611         const struct rt2x00lib_ops *lib;
 612         const struct ieee80211_ops *hw;
 613 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 614         const struct rt2x00debug *debugfs;
 615 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 616 };
 617
 618 /*
 619  * rt2x00 device flags
 620  */
 621 enum rt2x00_flags {
 622         /*
 623          * Device state flags
 624          */
 625         DEVICE_STATE_PRESENT,
 626         DEVICE_STATE_REGISTERED_HW,
 627         DEVICE_STATE_INITIALIZED,
 628         DEVICE_STATE_STARTED,
 629         DEVICE_STATE_ENABLED_RADIO,
 630
 631         /*
 632          * Driver requirements
 633          */
 634         DRIVER_REQUIRE_FIRMWARE,
 635         DRIVER_REQUIRE_BEACON_GUARD,
 636         DRIVER_REQUIRE_ATIM_QUEUE,
 637         DRIVER_REQUIRE_DMA,
 638         DRIVER_REQUIRE_COPY_IV,
 639         DRIVER_REQUIRE_L2PAD,
 640
 641         /*
 642          * Driver features
 643          */
 644         CONFIG_SUPPORT_HW_BUTTON,
 645         CONFIG_SUPPORT_HW_CRYPTO,
 646         DRIVER_SUPPORT_CONTROL_FILTERS,
 647         DRIVER_SUPPORT_CONTROL_FILTER_PSPOLL,
 648
 649         /*
 650          * Driver configuration
 651          */
 652         CONFIG_FRAME_TYPE,
 653         CONFIG_RF_SEQUENCE,
 654         CONFIG_EXTERNAL_LNA_A,
 655         CONFIG_EXTERNAL_LNA_BG,
 656         CONFIG_DOUBLE_ANTENNA,
 657         CONFIG_DISABLE_LINK_TUNING,
 658         CONFIG_CHANNEL_HT40,
 659 };
 660
 661 /*
 662  * rt2x00 device structure.
 663  */
 664 struct rt2x00_dev {
 665         /*
 666          * Device structure.
 667          * The structure stored in here depends on the
 668          * system bus (PCI or USB).
 669          * When accessing this variable, the rt2x00dev_{pci,usb}
 670          * macros should be used for correct typecasting.
 671          */
 672         struct device *dev;
 673
 674         /*
 675          * Callback functions.
 676          */
 677         const struct rt2x00_ops *ops;
 678
 679         /*
 680          * IEEE80211 control structure.
 681          */
 682         struct ieee80211_hw *hw;
 683         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 684         enum ieee80211_band curr_band;
 685
 686         /*
 687          * If enabled, the debugfs interface structures
 688          * required for deregistration of debugfs.
 689          */
 690 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 691         struct rt2x00debug_intf *debugfs_intf;
 692 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 693
 694         /*
 695          * LED structure for changing the LED status
 696          * by mac8011 or the kernel.
 697          */
 698 #ifdef CONFIG_RT2X00_LIB_LEDS
 699         struct rt2x00_led led_radio;
 700         struct rt2x00_led led_assoc;
 701         struct rt2x00_led led_qual;
 702         u16 led_mcu_reg;
 703 #endif /* CONFIG_RT2X00_LIB_LEDS */
 704
 705         /*
 706          * Device flags.
 707          * In these flags the current status and some
 708          * of the device capabilities are stored.
 709          */
 710         unsigned long flags;
 711
 712         /*
 713          * Device information, Bus IRQ and name (PCI, SoC)
 714          */
 715         int irq;
 716         const char *name;
 717
 718         /*
 719          * Chipset identification.
 720          */
 721         struct rt2x00_chip chip;
 722
 723         /*
 724          * hw capability specifications.
 725          */
 726         struct hw_mode_spec spec;
 727
 728         /*
 729          * This is the default TX/RX antenna setup as indicated
 730          * by the device's EEPROM.
 731          */
 732         struct antenna_setup default_ant;
 733
 734         /*
 735          * Register pointers
 736          * csr.base: CSR base register address. (PCI)
 737          * csr.cache: CSR cache for usb_control_msg. (USB)
 738          */
 739         union csr {
 740                 void __iomem *base;
 741                 void *cache;
 742         } csr;
 743
 744         /*
 745          * Mutex to protect register accesses.
 746          * For PCI and USB devices it protects against concurrent indirect
 747          * register access (BBP, RF, MCU) since accessing those
 748          * registers require multiple calls to the CSR registers.
 749          * For USB devices it also protects the csr_cache since that
 750          * field is used for normal CSR access and it cannot support
 751          * multiple callers simultaneously.
 752          */
 753         struct mutex csr_mutex;
 754
 755         /*
 756          * Current packet filter configuration for the device.
 757          * This contains all currently active FIF_* flags send
 758          * to us by mac80211 during configure_filter().
 759          */
 760         unsigned int packet_filter;
 761
 762         /*
 763          * Interface details:
 764          *  - Open ap interface count.
 765          *  - Open sta interface count.
 766          *  - Association count.
 767          */
 768         unsigned int intf_ap_count;
 769         unsigned int intf_sta_count;
 770         unsigned int intf_associated;
 771
 772         /*
 773          * Link quality
 774          */
 775         struct link link;
 776
 777         /*
 778          * EEPROM data.
 779          */
 780         __le16 *eeprom;
 781
 782         /*
 783          * Active RF register values.
 784          * These are stored here so we don't need
 785          * to read the rf registers and can directly
 786          * use this value instead.
 787          * This field should be accessed by using
 788          * rt2x00_rf_read() and rt2x00_rf_write().
 789          */
 790         u32 *rf;
 791
 792         /*
 793          * LNA gain
 794          */
 795         short lna_gain;
 796
 797         /*
 798          * Current TX power value.
 799          */
 800         u16 tx_power;
 801
 802         /*
 803          * Current retry values.
 804          */
 805         u8 short_retry;
 806         u8 long_retry;
 807
 808         /*
 809          * Rssi <-> Dbm offset
 810          */
 811         u8 rssi_offset;
 812
 813         /*
 814          * Frequency offset (for rt61pci & rt73usb).
 815          */
 816         u8 freq_offset;
 817
 818         /*
 819          * Calibration information (for rt2800usb & rt2800pci).
 820          * [0] -> BW20
 821          * [1] -> BW40
 822          */
 823         u8 calibration[2];
 824
 825         /*
 826          * Beacon interval.
 827          */
 828         u16 beacon_int;
 829
 830         /*
 831          * Low level statistics which will have
 832          * to be kept up to date while device is running.
 833          */
 834         struct ieee80211_low_level_stats low_level_stats;
 835
 836         /*
 837          * RX configuration information.
 838          */
 839         struct ieee80211_rx_status rx_status;
 840
 841         /*
 842          * Scheduled work.
 843          * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
 844          * which means it cannot be placed on the hw->workqueue
 845          * due to RTNL locking requirements.
 846          */
 847         struct work_struct intf_work;
 848
 849         /*
 850          * Data queue arrays for RX, TX and Beacon.
 851          * The Beacon array also contains the Atim queue
 852          * if that is supported by the device.
 853          */
 854         unsigned int data_queues;
 855         struct data_queue *rx;
 856         struct data_queue *tx;
 857         struct data_queue *bcn;
 858
 859         /*
 860          * Firmware image.
 861          */
 862         const struct firmware *fw;
 863
 864         /*
 865          * Driver specific data.
 866          */
 867         void *priv;
 868 };
 869
 870 /*
 871  * Register defines.
 872  * Some registers require multiple attempts before success,
 873  * in those cases REGISTER_BUSY_COUNT attempts should be
 874  * taken with a REGISTER_BUSY_DELAY interval.
 875  */
 876 #define REGISTER_BUSY_COUNT     5
 877 #define REGISTER_BUSY_DELAY     100
 878
 879 /*
 880  * Generic RF access.
 881  * The RF is being accessed by word index.
 882  */
 883 static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
 884                                   const unsigned int word, u32 *data)
 885 {
 886         BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
 887         *data = rt2x00dev->rf[word - 1];
 888 }
 889
 890 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
 891                                    const unsigned int word, u32 data)
 892 {
 893         BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
 894         rt2x00dev->rf[word - 1] = data;
 895 }
 896
 897 /*
 898  *  Generic EEPROM access.
 899  * The EEPROM is being accessed by word index.
 900  */
 901 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
 902                                        const unsigned int word)
 903 {
 904         return (void *)&rt2x00dev->eeprom[word];
 905 }
 906
 907 static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
 908                                       const unsigned int word, u16 *data)
 909 {
 910         *data = le16_to_cpu(rt2x00dev->eeprom[word]);
 911 }
 912
 913 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
 914                                        const unsigned int word, u16 data)
 915 {
 916         rt2x00dev->eeprom[word] = cpu_to_le16(data);
 917 }
 918
 919 /*
 920  * Chipset handlers
 921  */
 922 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
 923                                    const u16 rt, const u16 rf, const u16 rev)
 924 {
 925         rt2x00dev->chip.rt = rt;
 926         rt2x00dev->chip.rf = rf;
 927         rt2x00dev->chip.rev = rev;
 928
 929         INFO(rt2x00dev,
 930              "Chipset detected - rt: %04x, rf: %04x, rev: %04x.\n",
 931              rt2x00dev->chip.rt, rt2x00dev->chip.rf, rt2x00dev->chip.rev);
 932 }
 933
 934 static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
 935 {
 936         return (rt2x00dev->chip.rt == rt);
 937 }
 938
 939 static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
 940 {
 941         return (rt2x00dev->chip.rf == rf);
 942 }
 943
 944 static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
 945 {
 946         return rt2x00dev->chip.rev;
 947 }
 948
 949 static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
 950                                  const u16 rt, const u16 rev)
 951 {
 952         return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
 953 }
 954
 955 static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
 956                                     const u16 rt, const u16 rev)
 957 {
 958         return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
 959 }
 960
 961 static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
 962                                      const u16 rt, const u16 rev)
 963 {
 964         return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
 965 }
 966
 967 static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
 968                                         enum rt2x00_chip_intf intf)
 969 {
 970         rt2x00dev->chip.intf = intf;
 971 }
 972
 973 static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
 974                                enum rt2x00_chip_intf intf)
 975 {
 976         return (rt2x00dev->chip.intf == intf);
 977 }
 978
 979 static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
 980 {
 981         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
 982 }
 983
 984 static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
 985 {
 986         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
 987 }
 988
 989 static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
 990 {
 991         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
 992 }
 993
 994 /**
 995  * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
 996  * @rt2x00dev: Pointer to &struct rt2x00_dev.
 997  * @skb: The skb to map.
 998  */
 999 void rt2x00queue_map_txskb(struct rt2x00_dev *rt2x00dev, struct sk_buff *skb);
1000
1001 /**
1002  * rt2x00queue_get_queue - Convert queue index to queue pointer
1003  * @rt2x00dev: Pointer to &struct rt2x00_dev.
1004  * @queue: rt2x00 queue index (see &enum data_queue_qid).
1005  */
1006 struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
1007                                          const enum data_queue_qid queue);
1008
1009 /**
1010  * rt2x00queue_get_entry - Get queue entry where the given index points to.
1011  * @queue: Pointer to &struct data_queue from where we obtain the entry.
1012  * @index: Index identifier for obtaining the correct index.
1013  */
1014 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
1015                                           enum queue_index index);
1016
1017 /*
1018  * Interrupt context handlers.
1019  */
1020 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
1021 void rt2x00lib_txdone(struct queue_entry *entry,
1022                       struct txdone_entry_desc *txdesc);
1023 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
1024                       struct queue_entry *entry);
1025
1026 /*
1027  * mac80211 handlers.
1028  */
1029 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
1030 int rt2x00mac_start(struct ieee80211_hw *hw);
1031 void rt2x00mac_stop(struct ieee80211_hw *hw);
1032 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1033                             struct ieee80211_vif *vif);
1034 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1035                                 struct ieee80211_vif *vif);
1036 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
1037 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1038                                 unsigned int changed_flags,
1039                                 unsigned int *total_flags,
1040                                 u64 multicast);
1041 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1042                       bool set);
1043 #ifdef CONFIG_RT2X00_LIB_CRYPTO
1044 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1045                       struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1046                       struct ieee80211_key_conf *key);
1047 #else
1048 #define rt2x00mac_set_key       NULL
1049 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
1050 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1051                         struct ieee80211_low_level_stats *stats);
1052 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1053                                 struct ieee80211_vif *vif,
1054                                 struct ieee80211_bss_conf *bss_conf,
1055                                 u32 changes);
1056 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1057                       const struct ieee80211_tx_queue_params *params);
1058 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
1059
1060 /*
1061  * Driver allocation handlers.
1062  */
1063 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1064 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1065 #ifdef CONFIG_PM
1066 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1067 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1068 #endif /* CONFIG_PM */
1069
1070 #endif /* RT2X00_H */