drivers/net/wireless/rt2x00/rt2x00.h

   1 /*
   2         Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
   3         Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
   4         Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
   5         <http://rt2x00.serialmonkey.com>
   6
   7         This program is free software; you can redistribute it and/or modify
   8         it under the terms of the GNU General Public License as published by
   9         the Free Software Foundation; either version 2 of the License, or
  10         (at your option) any later version.
  11
  12         This program is distributed in the hope that it will be useful,
  13         but WITHOUT ANY WARRANTY; without even the implied warranty of
  14         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15         GNU General Public License for more details.
  16
  17         You should have received a copy of the GNU General Public License
  18         along with this program; if not, write to the
  19         Free Software Foundation, Inc.,
  20         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24         Module: rt2x00
  25         Abstract: rt2x00 global information.
  26  */
  27
  28 #ifndef RT2X00_H
  29 #define RT2X00_H
  30
  31 #include <linux/bitops.h>
  32 #include <linux/skbuff.h>
  33 #include <linux/workqueue.h>
  34 #include <linux/firmware.h>
  35 #include <linux/leds.h>
  36 #include <linux/mutex.h>
  37 #include <linux/etherdevice.h>
  38 #include <linux/input-polldev.h>
  39 #include <linux/kfifo.h>
  40
  41 #include <net/mac80211.h>
  42
  43 #include "rt2x00debug.h"
  44 #include "rt2x00dump.h"
  45 #include "rt2x00leds.h"
  46 #include "rt2x00reg.h"
  47 #include "rt2x00queue.h"
  48
  49 /*
  50  * Module information.
  51  */
  52 #define DRV_VERSION     "2.3.0"
  53 #define DRV_PROJECT     "http://rt2x00.serialmonkey.com"
  54
  55 /*
  56  * Debug definitions.
  57  * Debug output has to be enabled during compile time.
  58  */
  59 #define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...)     \
  60         printk(__kernlvl "%s -> %s: %s - " __msg,                       \
  61                wiphy_name((__dev)->hw->wiphy), __func__, __lvl, ##__args)
  62
  63 #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...)  \
  64         printk(__kernlvl "%s -> %s: %s - " __msg,               \
  65                KBUILD_MODNAME, __func__, __lvl, ##__args)
  66
  67 #ifdef CONFIG_RT2X00_DEBUG
  68 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  69         DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args);
  70 #else
  71 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  72         do { } while (0)
  73 #endif /* CONFIG_RT2X00_DEBUG */
  74
  75 /*
  76  * Various debug levels.
  77  * The debug levels PANIC and ERROR both indicate serious problems,
  78  * for this reason they should never be ignored.
  79  * The special ERROR_PROBE message is for messages that are generated
  80  * when the rt2x00_dev is not yet initialized.
  81  */
  82 #define PANIC(__dev, __msg, __args...) \
  83         DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args)
  84 #define ERROR(__dev, __msg, __args...)  \
  85         DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args)
  86 #define ERROR_PROBE(__msg, __args...) \
  87         DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args)
  88 #define WARNING(__dev, __msg, __args...) \
  89         DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args)
  90 #define NOTICE(__dev, __msg, __args...) \
  91         DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args)
  92 #define INFO(__dev, __msg, __args...) \
  93         DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args)
  94 #define DEBUG(__dev, __msg, __args...) \
  95         DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args)
  96 #define EEPROM(__dev, __msg, __args...) \
  97         DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args)
  98
  99 /*
 100  * Duration calculations
 101  * The rate variable passed is: 100kbs.
 102  * To convert from bytes to bits we multiply size with 8,
 103  * then the size is multiplied with 10 to make the
 104  * real rate -> rate argument correction.
 105  */
 106 #define GET_DURATION(__size, __rate)    (((__size) * 8 * 10) / (__rate))
 107 #define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
 108
 109 /*
 110  * Determine the number of L2 padding bytes required between the header and
 111  * the payload.
 112  */
 113 #define L2PAD_SIZE(__hdrlen)    (-(__hdrlen) & 3)
 114
 115 /*
 116  * Determine the alignment requirement,
 117  * to make sure the 802.11 payload is padded to a 4-byte boundrary
 118  * we must determine the address of the payload and calculate the
 119  * amount of bytes needed to move the data.
 120  */
 121 #define ALIGN_SIZE(__skb, __header) \
 122         (  ((unsigned long)((__skb)->data + (__header))) & 3 )
 123
 124 /*
 125  * Constants for extra TX headroom for alignment purposes.
 126  */
 127 #define RT2X00_ALIGN_SIZE       4 /* Only whole frame needs alignment */
 128 #define RT2X00_L2PAD_SIZE       8 /* Both header & payload need alignment */
 129
 130 /*
 131  * Standard timing and size defines.
 132  * These values should follow the ieee80211 specifications.
 133  */
 134 #define ACK_SIZE                14
 135 #define IEEE80211_HEADER        24
 136 #define PLCP                    48
 137 #define BEACON                  100
 138 #define PREAMBLE                144
 139 #define SHORT_PREAMBLE          72
 140 #define SLOT_TIME               20
 141 #define SHORT_SLOT_TIME         9
 142 #define SIFS                    10
 143 #define PIFS                    ( SIFS + SLOT_TIME )
 144 #define SHORT_PIFS              ( SIFS + SHORT_SLOT_TIME )
 145 #define DIFS                    ( PIFS + SLOT_TIME )
 146 #define SHORT_DIFS              ( SHORT_PIFS + SHORT_SLOT_TIME )
 147 #define EIFS                    ( SIFS + DIFS + \
 148                                   GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
 149 #define SHORT_EIFS              ( SIFS + SHORT_DIFS + \
 150                                   GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
 151
 152 /*
 153  * Structure for average calculation
 154  * The avg field contains the actual average value,
 155  * but avg_weight is internally used during calculations
 156  * to prevent rounding errors.
 157  */
 158 struct avg_val {
 159         int avg;
 160         int avg_weight;
 161 };
 162
 163 enum rt2x00_chip_intf {
 164         RT2X00_CHIP_INTF_PCI,
 165         RT2X00_CHIP_INTF_PCIE,
 166         RT2X00_CHIP_INTF_USB,
 167         RT2X00_CHIP_INTF_SOC,
 168 };
 169
 170 /*
 171  * Chipset identification
 172  * The chipset on the device is composed of a RT and RF chip.
 173  * The chipset combination is important for determining device capabilities.
 174  */
 175 struct rt2x00_chip {
 176         u16 rt;
 177 #define RT2460          0x2460
 178 #define RT2560          0x2560
 179 #define RT2570          0x2570
 180 #define RT2661          0x2661
 181 #define RT2573          0x2573
 182 #define RT2860          0x2860  /* 2.4GHz */
 183 #define RT2872          0x2872  /* WSOC */
 184 #define RT2883          0x2883  /* WSOC */
 185 #define RT3070          0x3070
 186 #define RT3071          0x3071
 187 #define RT3090          0x3090  /* 2.4GHz PCIe */
 188 #define RT3390          0x3390
 189 #define RT3572          0x3572
 190 #define RT3593          0x3593  /* PCIe */
 191 #define RT3883          0x3883  /* WSOC */
 192
 193         u16 rf;
 194         u16 rev;
 195
 196         enum rt2x00_chip_intf intf;
 197 };
 198
 199 /*
 200  * RF register values that belong to a particular channel.
 201  */
 202 struct rf_channel {
 203         int channel;
 204         u32 rf1;
 205         u32 rf2;
 206         u32 rf3;
 207         u32 rf4;
 208 };
 209
 210 /*
 211  * Channel information structure
 212  */
 213 struct channel_info {
 214         unsigned int flags;
 215 #define GEOGRAPHY_ALLOWED       0x00000001
 216
 217         short max_power;
 218         short default_power1;
 219         short default_power2;
 220 };
 221
 222 /*
 223  * Antenna setup values.
 224  */
 225 struct antenna_setup {
 226         enum antenna rx;
 227         enum antenna tx;
 228 };
 229
 230 /*
 231  * Quality statistics about the currently active link.
 232  */
 233 struct link_qual {
 234         /*
 235          * Statistics required for Link tuning by driver
 236          * The rssi value is provided by rt2x00lib during the
 237          * link_tuner() callback function.
 238          * The false_cca field is filled during the link_stats()
 239          * callback function and could be used during the
 240          * link_tuner() callback function.
 241          */
 242         int rssi;
 243         int false_cca;
 244
 245         /*
 246          * VGC levels
 247          * Hardware driver will tune the VGC level during each call
 248          * to the link_tuner() callback function. This vgc_level is
 249          * is determined based on the link quality statistics like
 250          * average RSSI and the false CCA count.
 251          *
 252          * In some cases the drivers need to differentiate between
 253          * the currently "desired" VGC level and the level configured
 254          * in the hardware. The latter is important to reduce the
 255          * number of BBP register reads to reduce register access
 256          * overhead. For this reason we store both values here.
 257          */
 258         u8 vgc_level;
 259         u8 vgc_level_reg;
 260
 261         /*
 262          * Statistics required for Signal quality calculation.
 263          * These fields might be changed during the link_stats()
 264          * callback function.
 265          */
 266         int rx_success;
 267         int rx_failed;
 268         int tx_success;
 269         int tx_failed;
 270 };
 271
 272 /*
 273  * Antenna settings about the currently active link.
 274  */
 275 struct link_ant {
 276         /*
 277          * Antenna flags
 278          */
 279         unsigned int flags;
 280 #define ANTENNA_RX_DIVERSITY    0x00000001
 281 #define ANTENNA_TX_DIVERSITY    0x00000002
 282 #define ANTENNA_MODE_SAMPLE     0x00000004
 283
 284         /*
 285          * Currently active TX/RX antenna setup.
 286          * When software diversity is used, this will indicate
 287          * which antenna is actually used at this time.
 288          */
 289         struct antenna_setup active;
 290
 291         /*
 292          * RSSI history information for the antenna.
 293          * Used to determine when to switch antenna
 294          * when using software diversity.
 295          */
 296         int rssi_history;
 297
 298         /*
 299          * Current RSSI average of the currently active antenna.
 300          * Similar to the avg_rssi in the link_qual structure
 301          * this value is updated by using the walking average.
 302          */
 303         struct avg_val rssi_ant;
 304 };
 305
 306 /*
 307  * To optimize the quality of the link we need to store
 308  * the quality of received frames and periodically
 309  * optimize the link.
 310  */
 311 struct link {
 312         /*
 313          * Link tuner counter
 314          * The number of times the link has been tuned
 315          * since the radio has been switched on.
 316          */
 317         u32 count;
 318
 319         /*
 320          * Quality measurement values.
 321          */
 322         struct link_qual qual;
 323
 324         /*
 325          * TX/RX antenna setup.
 326          */
 327         struct link_ant ant;
 328
 329         /*
 330          * Currently active average RSSI value
 331          */
 332         struct avg_val avg_rssi;
 333
 334         /*
 335          * Work structure for scheduling periodic link tuning.
 336          */
 337         struct delayed_work work;
 338
 339         /*
 340          * Work structure for scheduling periodic watchdog monitoring.
 341          * This work must be scheduled on the kernel workqueue, while
 342          * all other work structures must be queued on the mac80211
 343          * workqueue. This guarantees that the watchdog can schedule
 344          * other work structures and wait for their completion in order
 345          * to bring the device/driver back into the desired state.
 346          */
 347         struct delayed_work watchdog_work;
 348 };
 349
 350 /*
 351  * Interface structure
 352  * Per interface configuration details, this structure
 353  * is allocated as the private data for ieee80211_vif.
 354  */
 355 struct rt2x00_intf {
 356         /*
 357          * All fields within the rt2x00_intf structure
 358          * must be protected with a spinlock.
 359          */
 360         spinlock_t lock;
 361
 362         /*
 363          * MAC of the device.
 364          */
 365         u8 mac[ETH_ALEN];
 366
 367         /*
 368          * BBSID of the AP to associate with.
 369          */
 370         u8 bssid[ETH_ALEN];
 371
 372         /*
 373          * beacon->skb must be protected with the mutex.
 374          */
 375         struct mutex beacon_skb_mutex;
 376
 377         /*
 378          * Entry in the beacon queue which belongs to
 379          * this interface. Each interface has its own
 380          * dedicated beacon entry.
 381          */
 382         struct queue_entry *beacon;
 383
 384         /*
 385          * Actions that needed rescheduling.
 386          */
 387         unsigned int delayed_flags;
 388 #define DELAYED_UPDATE_BEACON           0x00000001
 389
 390         /*
 391          * Software sequence counter, this is only required
 392          * for hardware which doesn't support hardware
 393          * sequence counting.
 394          */
 395         spinlock_t seqlock;
 396         u16 seqno;
 397 };
 398
 399 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
 400 {
 401         return (struct rt2x00_intf *)vif->drv_priv;
 402 }
 403
 404 /**
 405  * struct hw_mode_spec: Hardware specifications structure
 406  *
 407  * Details about the supported modes, rates and channels
 408  * of a particular chipset. This is used by rt2x00lib
 409  * to build the ieee80211_hw_mode array for mac80211.
 410  *
 411  * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
 412  * @supported_rates: Rate types which are supported (CCK, OFDM).
 413  * @num_channels: Number of supported channels. This is used as array size
 414  *      for @tx_power_a, @tx_power_bg and @channels.
 415  * @channels: Device/chipset specific channel values (See &struct rf_channel).
 416  * @channels_info: Additional information for channels (See &struct channel_info).
 417  * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
 418  */
 419 struct hw_mode_spec {
 420         unsigned int supported_bands;
 421 #define SUPPORT_BAND_2GHZ       0x00000001
 422 #define SUPPORT_BAND_5GHZ       0x00000002
 423
 424         unsigned int supported_rates;
 425 #define SUPPORT_RATE_CCK        0x00000001
 426 #define SUPPORT_RATE_OFDM       0x00000002
 427
 428         unsigned int num_channels;
 429         const struct rf_channel *channels;
 430         const struct channel_info *channels_info;
 431
 432         struct ieee80211_sta_ht_cap ht;
 433 };
 434
 435 /*
 436  * Configuration structure wrapper around the
 437  * mac80211 configuration structure.
 438  * When mac80211 configures the driver, rt2x00lib
 439  * can precalculate values which are equal for all
 440  * rt2x00 drivers. Those values can be stored in here.
 441  */
 442 struct rt2x00lib_conf {
 443         struct ieee80211_conf *conf;
 444
 445         struct rf_channel rf;
 446         struct channel_info channel;
 447 };
 448
 449 /*
 450  * Configuration structure for erp settings.
 451  */
 452 struct rt2x00lib_erp {
 453         int short_preamble;
 454         int cts_protection;
 455
 456         u32 basic_rates;
 457
 458         int slot_time;
 459
 460         short sifs;
 461         short pifs;
 462         short difs;
 463         short eifs;
 464
 465         u16 beacon_int;
 466         u16 ht_opmode;
 467 };
 468
 469 /*
 470  * Configuration structure for hardware encryption.
 471  */
 472 struct rt2x00lib_crypto {
 473         enum cipher cipher;
 474
 475         enum set_key_cmd cmd;
 476         const u8 *address;
 477
 478         u32 bssidx;
 479         u32 aid;
 480
 481         u8 key[16];
 482         u8 tx_mic[8];
 483         u8 rx_mic[8];
 484 };
 485
 486 /*
 487  * Configuration structure wrapper around the
 488  * rt2x00 interface configuration handler.
 489  */
 490 struct rt2x00intf_conf {
 491         /*
 492          * Interface type
 493          */
 494         enum nl80211_iftype type;
 495
 496         /*
 497          * TSF sync value, this is dependant on the operation type.
 498          */
 499         enum tsf_sync sync;
 500
 501         /*
 502          * The MAC and BSSID addressess are simple array of bytes,
 503          * these arrays are little endian, so when sending the addressess
 504          * to the drivers, copy the it into a endian-signed variable.
 505          *
 506          * Note that all devices (except rt2500usb) have 32 bits
 507          * register word sizes. This means that whatever variable we
 508          * pass _must_ be a multiple of 32 bits. Otherwise the device
 509          * might not accept what we are sending to it.
 510          * This will also make it easier for the driver to write
 511          * the data to the device.
 512          */
 513         __le32 mac[2];
 514         __le32 bssid[2];
 515 };
 516
 517 /*
 518  * rt2x00lib callback functions.
 519  */
 520 struct rt2x00lib_ops {
 521         /*
 522          * Interrupt handlers.
 523          */
 524         irq_handler_t irq_handler;
 525
 526         /*
 527          * Threaded Interrupt handlers.
 528          */
 529         irq_handler_t irq_handler_thread;
 530
 531         /*
 532          * TX status tasklet handler.
 533          */
 534         void (*txstatus_tasklet) (unsigned long data);
 535
 536         /*
 537          * Device init handlers.
 538          */
 539         int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
 540         char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
 541         int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
 542                                const u8 *data, const size_t len);
 543         int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
 544                               const u8 *data, const size_t len);
 545
 546         /*
 547          * Device initialization/deinitialization handlers.
 548          */
 549         int (*initialize) (struct rt2x00_dev *rt2x00dev);
 550         void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 551
 552         /*
 553          * queue initialization handlers
 554          */
 555         bool (*get_entry_state) (struct queue_entry *entry);
 556         void (*clear_entry) (struct queue_entry *entry);
 557
 558         /*
 559          * Radio control handlers.
 560          */
 561         int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
 562                                  enum dev_state state);
 563         int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
 564         void (*link_stats) (struct rt2x00_dev *rt2x00dev,
 565                             struct link_qual *qual);
 566         void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
 567                              struct link_qual *qual);
 568         void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
 569                             struct link_qual *qual, const u32 count);
 570         void (*watchdog) (struct rt2x00_dev *rt2x00dev);
 571
 572         /*
 573          * TX control handlers
 574          */
 575         void (*write_tx_desc) (struct queue_entry *entry,
 576                                struct txentry_desc *txdesc);
 577         void (*write_tx_data) (struct queue_entry *entry,
 578                                struct txentry_desc *txdesc);
 579         void (*write_beacon) (struct queue_entry *entry,
 580                               struct txentry_desc *txdesc);
 581         int (*get_tx_data_len) (struct queue_entry *entry);
 582         void (*kick_tx_queue) (struct data_queue *queue);
 583         void (*kill_tx_queue) (struct data_queue *queue);
 584
 585         /*
 586          * RX control handlers
 587          */
 588         void (*fill_rxdone) (struct queue_entry *entry,
 589                              struct rxdone_entry_desc *rxdesc);
 590
 591         /*
 592          * Configuration handlers.
 593          */
 594         int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
 595                                   struct rt2x00lib_crypto *crypto,
 596                                   struct ieee80211_key_conf *key);
 597         int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
 598                                     struct rt2x00lib_crypto *crypto,
 599                                     struct ieee80211_key_conf *key);
 600         void (*config_filter) (struct rt2x00_dev *rt2x00dev,
 601                                const unsigned int filter_flags);
 602         void (*config_intf) (struct rt2x00_dev *rt2x00dev,
 603                              struct rt2x00_intf *intf,
 604                              struct rt2x00intf_conf *conf,
 605                              const unsigned int flags);
 606 #define CONFIG_UPDATE_TYPE              ( 1 << 1 )
 607 #define CONFIG_UPDATE_MAC               ( 1 << 2 )
 608 #define CONFIG_UPDATE_BSSID             ( 1 << 3 )
 609
 610         void (*config_erp) (struct rt2x00_dev *rt2x00dev,
 611                             struct rt2x00lib_erp *erp,
 612                             u32 changed);
 613         void (*config_ant) (struct rt2x00_dev *rt2x00dev,
 614                             struct antenna_setup *ant);
 615         void (*config) (struct rt2x00_dev *rt2x00dev,
 616                         struct rt2x00lib_conf *libconf,
 617                         const unsigned int changed_flags);
 618 };
 619
 620 /*
 621  * rt2x00 driver callback operation structure.
 622  */
 623 struct rt2x00_ops {
 624         const char *name;
 625         const unsigned int max_sta_intf;
 626         const unsigned int max_ap_intf;
 627         const unsigned int eeprom_size;
 628         const unsigned int rf_size;
 629         const unsigned int tx_queues;
 630         const unsigned int extra_tx_headroom;
 631         const struct data_queue_desc *rx;
 632         const struct data_queue_desc *tx;
 633         const struct data_queue_desc *bcn;
 634         const struct data_queue_desc *atim;
 635         const struct rt2x00lib_ops *lib;
 636         const void *drv;
 637         const struct ieee80211_ops *hw;
 638 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 639         const struct rt2x00debug *debugfs;
 640 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 641 };
 642
 643 /*
 644  * rt2x00 device flags
 645  */
 646 enum rt2x00_flags {
 647         /*
 648          * Device state flags
 649          */
 650         DEVICE_STATE_PRESENT,
 651         DEVICE_STATE_REGISTERED_HW,
 652         DEVICE_STATE_INITIALIZED,
 653         DEVICE_STATE_STARTED,
 654         DEVICE_STATE_ENABLED_RADIO,
 655         DEVICE_STATE_SCANNING,
 656
 657         /*
 658          * Driver requirements
 659          */
 660         DRIVER_REQUIRE_FIRMWARE,
 661         DRIVER_REQUIRE_BEACON_GUARD,
 662         DRIVER_REQUIRE_ATIM_QUEUE,
 663         DRIVER_REQUIRE_DMA,
 664         DRIVER_REQUIRE_COPY_IV,
 665         DRIVER_REQUIRE_L2PAD,
 666         DRIVER_REQUIRE_TXSTATUS_FIFO,
 667         DRIVER_REQUIRE_TASKLET_CONTEXT,
 668
 669         /*
 670          * Driver features
 671          */
 672         CONFIG_SUPPORT_HW_BUTTON,
 673         CONFIG_SUPPORT_HW_CRYPTO,
 674         DRIVER_SUPPORT_CONTROL_FILTERS,
 675         DRIVER_SUPPORT_CONTROL_FILTER_PSPOLL,
 676         DRIVER_SUPPORT_PRE_TBTT_INTERRUPT,
 677         DRIVER_SUPPORT_LINK_TUNING,
 678         DRIVER_SUPPORT_WATCHDOG,
 679
 680         /*
 681          * Driver configuration
 682          */
 683         CONFIG_FRAME_TYPE,
 684         CONFIG_RF_SEQUENCE,
 685         CONFIG_EXTERNAL_LNA_A,
 686         CONFIG_EXTERNAL_LNA_BG,
 687         CONFIG_DOUBLE_ANTENNA,
 688         CONFIG_CHANNEL_HT40,
 689 };
 690
 691 /*
 692  * rt2x00 device structure.
 693  */
 694 struct rt2x00_dev {
 695         /*
 696          * Device structure.
 697          * The structure stored in here depends on the
 698          * system bus (PCI or USB).
 699          * When accessing this variable, the rt2x00dev_{pci,usb}
 700          * macros should be used for correct typecasting.
 701          */
 702         struct device *dev;
 703
 704         /*
 705          * Callback functions.
 706          */
 707         const struct rt2x00_ops *ops;
 708
 709         /*
 710          * IEEE80211 control structure.
 711          */
 712         struct ieee80211_hw *hw;
 713         struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
 714         enum ieee80211_band curr_band;
 715         int curr_freq;
 716
 717         /*
 718          * If enabled, the debugfs interface structures
 719          * required for deregistration of debugfs.
 720          */
 721 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 722         struct rt2x00debug_intf *debugfs_intf;
 723 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 724
 725         /*
 726          * LED structure for changing the LED status
 727          * by mac8011 or the kernel.
 728          */
 729 #ifdef CONFIG_RT2X00_LIB_LEDS
 730         struct rt2x00_led led_radio;
 731         struct rt2x00_led led_assoc;
 732         struct rt2x00_led led_qual;
 733         u16 led_mcu_reg;
 734 #endif /* CONFIG_RT2X00_LIB_LEDS */
 735
 736         /*
 737          * Device flags.
 738          * In these flags the current status and some
 739          * of the device capabilities are stored.
 740          */
 741         unsigned long flags;
 742
 743         /*
 744          * Device information, Bus IRQ and name (PCI, SoC)
 745          */
 746         int irq;
 747         const char *name;
 748
 749         /*
 750          * Chipset identification.
 751          */
 752         struct rt2x00_chip chip;
 753
 754         /*
 755          * hw capability specifications.
 756          */
 757         struct hw_mode_spec spec;
 758
 759         /*
 760          * This is the default TX/RX antenna setup as indicated
 761          * by the device's EEPROM.
 762          */
 763         struct antenna_setup default_ant;
 764
 765         /*
 766          * Register pointers
 767          * csr.base: CSR base register address. (PCI)
 768          * csr.cache: CSR cache for usb_control_msg. (USB)
 769          */
 770         union csr {
 771                 void __iomem *base;
 772                 void *cache;
 773         } csr;
 774
 775         /*
 776          * Mutex to protect register accesses.
 777          * For PCI and USB devices it protects against concurrent indirect
 778          * register access (BBP, RF, MCU) since accessing those
 779          * registers require multiple calls to the CSR registers.
 780          * For USB devices it also protects the csr_cache since that
 781          * field is used for normal CSR access and it cannot support
 782          * multiple callers simultaneously.
 783          */
 784         struct mutex csr_mutex;
 785
 786         /*
 787          * Current packet filter configuration for the device.
 788          * This contains all currently active FIF_* flags send
 789          * to us by mac80211 during configure_filter().
 790          */
 791         unsigned int packet_filter;
 792
 793         /*
 794          * Interface details:
 795          *  - Open ap interface count.
 796          *  - Open sta interface count.
 797          *  - Association count.
 798          */
 799         unsigned int intf_ap_count;
 800         unsigned int intf_sta_count;
 801         unsigned int intf_associated;
 802
 803         /*
 804          * Link quality
 805          */
 806         struct link link;
 807
 808         /*
 809          * EEPROM data.
 810          */
 811         __le16 *eeprom;
 812
 813         /*
 814          * Active RF register values.
 815          * These are stored here so we don't need
 816          * to read the rf registers and can directly
 817          * use this value instead.
 818          * This field should be accessed by using
 819          * rt2x00_rf_read() and rt2x00_rf_write().
 820          */
 821         u32 *rf;
 822
 823         /*
 824          * LNA gain
 825          */
 826         short lna_gain;
 827
 828         /*
 829          * Current TX power value.
 830          */
 831         u16 tx_power;
 832
 833         /*
 834          * Current retry values.
 835          */
 836         u8 short_retry;
 837         u8 long_retry;
 838
 839         /*
 840          * Rssi <-> Dbm offset
 841          */
 842         u8 rssi_offset;
 843
 844         /*
 845          * Frequency offset (for rt61pci & rt73usb).
 846          */
 847         u8 freq_offset;
 848
 849         /*
 850          * Calibration information (for rt2800usb & rt2800pci).
 851          * [0] -> BW20
 852          * [1] -> BW40
 853          */
 854         u8 calibration[2];
 855
 856         /*
 857          * Beacon interval.
 858          */
 859         u16 beacon_int;
 860
 861         /*
 862          * Low level statistics which will have
 863          * to be kept up to date while device is running.
 864          */
 865         struct ieee80211_low_level_stats low_level_stats;
 866
 867         /*
 868          * Scheduled work.
 869          * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
 870          * which means it cannot be placed on the hw->workqueue
 871          * due to RTNL locking requirements.
 872          */
 873         struct work_struct intf_work;
 874
 875         /**
 876          * Scheduled work for TX/RX done handling (USB devices)
 877          */
 878         struct work_struct rxdone_work;
 879         struct work_struct txdone_work;
 880
 881         /*
 882          * Data queue arrays for RX, TX and Beacon.
 883          * The Beacon array also contains the Atim queue
 884          * if that is supported by the device.
 885          */
 886         unsigned int data_queues;
 887         struct data_queue *rx;
 888         struct data_queue *tx;
 889         struct data_queue *bcn;
 890
 891         /*
 892          * Firmware image.
 893          */
 894         const struct firmware *fw;
 895
 896         /*
 897          * Interrupt values, stored between interrupt service routine
 898          * and interrupt thread routine.
 899          */
 900         u32 irqvalue[2];
 901
 902         /*
 903          * FIFO for storing tx status reports between isr and tasklet.
 904          */
 905         struct kfifo txstatus_fifo;
 906
 907         /*
 908          * Tasklet for processing tx status reports (rt2800pci).
 909          */
 910         struct tasklet_struct txstatus_tasklet;
 911 };
 912
 913 /*
 914  * Register defines.
 915  * Some registers require multiple attempts before success,
 916  * in those cases REGISTER_BUSY_COUNT attempts should be
 917  * taken with a REGISTER_BUSY_DELAY interval.
 918  */
 919 #define REGISTER_BUSY_COUNT     5
 920 #define REGISTER_BUSY_DELAY     100
 921
 922 /*
 923  * Generic RF access.
 924  * The RF is being accessed by word index.
 925  */
 926 static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
 927                                   const unsigned int word, u32 *data)
 928 {
 929         BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
 930         *data = rt2x00dev->rf[word - 1];
 931 }
 932
 933 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
 934                                    const unsigned int word, u32 data)
 935 {
 936         BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
 937         rt2x00dev->rf[word - 1] = data;
 938 }
 939
 940 /*
 941  *  Generic EEPROM access.
 942  * The EEPROM is being accessed by word index.
 943  */
 944 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
 945                                        const unsigned int word)
 946 {
 947         return (void *)&rt2x00dev->eeprom[word];
 948 }
 949
 950 static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
 951                                       const unsigned int word, u16 *data)
 952 {
 953         *data = le16_to_cpu(rt2x00dev->eeprom[word]);
 954 }
 955
 956 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
 957                                        const unsigned int word, u16 data)
 958 {
 959         rt2x00dev->eeprom[word] = cpu_to_le16(data);
 960 }
 961
 962 /*
 963  * Chipset handlers
 964  */
 965 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
 966                                    const u16 rt, const u16 rf, const u16 rev)
 967 {
 968         rt2x00dev->chip.rt = rt;
 969         rt2x00dev->chip.rf = rf;
 970         rt2x00dev->chip.rev = rev;
 971
 972         INFO(rt2x00dev,
 973              "Chipset detected - rt: %04x, rf: %04x, rev: %04x.\n",
 974              rt2x00dev->chip.rt, rt2x00dev->chip.rf, rt2x00dev->chip.rev);
 975 }
 976
 977 static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
 978 {
 979         return (rt2x00dev->chip.rt == rt);
 980 }
 981
 982 static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
 983 {
 984         return (rt2x00dev->chip.rf == rf);
 985 }
 986
 987 static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
 988 {
 989         return rt2x00dev->chip.rev;
 990 }
 991
 992 static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
 993                                  const u16 rt, const u16 rev)
 994 {
 995         return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
 996 }
 997
 998 static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
 999                                     const u16 rt, const u16 rev)
1000 {
1001         return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
1002 }
1003
1004 static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
1005                                      const u16 rt, const u16 rev)
1006 {
1007         return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
1008 }
1009
1010 static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
1011                                         enum rt2x00_chip_intf intf)
1012 {
1013         rt2x00dev->chip.intf = intf;
1014 }
1015
1016 static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
1017                                enum rt2x00_chip_intf intf)
1018 {
1019         return (rt2x00dev->chip.intf == intf);
1020 }
1021
1022 static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
1023 {
1024         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
1025                rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1026 }
1027
1028 static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
1029 {
1030         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1031 }
1032
1033 static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
1034 {
1035         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
1036 }
1037
1038 static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
1039 {
1040         return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
1041 }
1042
1043 /**
1044  * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
1045  * @entry: Pointer to &struct queue_entry
1046  */
1047 void rt2x00queue_map_txskb(struct queue_entry *entry);
1048
1049 /**
1050  * rt2x00queue_unmap_skb - Unmap a skb from DMA.
1051  * @entry: Pointer to &struct queue_entry
1052  */
1053 void rt2x00queue_unmap_skb(struct queue_entry *entry);
1054
1055 /**
1056  * rt2x00queue_get_queue - Convert queue index to queue pointer
1057  * @rt2x00dev: Pointer to &struct rt2x00_dev.
1058  * @queue: rt2x00 queue index (see &enum data_queue_qid).
1059  */
1060 struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev,
1061                                          const enum data_queue_qid queue);
1062
1063 /**
1064  * rt2x00queue_get_entry - Get queue entry where the given index points to.
1065  * @queue: Pointer to &struct data_queue from where we obtain the entry.
1066  * @index: Index identifier for obtaining the correct index.
1067  */
1068 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
1069                                           enum queue_index index);
1070
1071 /*
1072  * Debugfs handlers.
1073  */
1074 /**
1075  * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
1076  * @rt2x00dev: Pointer to &struct rt2x00_dev.
1077  * @type: The type of frame that is being dumped.
1078  * @skb: The skb containing the frame to be dumped.
1079  */
1080 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
1081 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1082                             enum rt2x00_dump_type type, struct sk_buff *skb);
1083 #else
1084 static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1085                                           enum rt2x00_dump_type type,
1086                                           struct sk_buff *skb)
1087 {
1088 }
1089 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1090
1091 /*
1092  * Interrupt context handlers.
1093  */
1094 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
1095 void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
1096 void rt2x00lib_dmadone(struct queue_entry *entry);
1097 void rt2x00lib_txdone(struct queue_entry *entry,
1098                       struct txdone_entry_desc *txdesc);
1099 void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
1100 void rt2x00lib_rxdone(struct queue_entry *entry);
1101
1102 /*
1103  * mac80211 handlers.
1104  */
1105 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
1106 int rt2x00mac_start(struct ieee80211_hw *hw);
1107 void rt2x00mac_stop(struct ieee80211_hw *hw);
1108 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1109                             struct ieee80211_vif *vif);
1110 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1111                                 struct ieee80211_vif *vif);
1112 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
1113 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1114                                 unsigned int changed_flags,
1115                                 unsigned int *total_flags,
1116                                 u64 multicast);
1117 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1118                       bool set);
1119 #ifdef CONFIG_RT2X00_LIB_CRYPTO
1120 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1121                       struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1122                       struct ieee80211_key_conf *key);
1123 #else
1124 #define rt2x00mac_set_key       NULL
1125 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
1126 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw);
1127 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw);
1128 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1129                         struct ieee80211_low_level_stats *stats);
1130 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1131                                 struct ieee80211_vif *vif,
1132                                 struct ieee80211_bss_conf *bss_conf,
1133                                 u32 changes);
1134 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1135                       const struct ieee80211_tx_queue_params *params);
1136 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
1137
1138 /*
1139  * Driver allocation handlers.
1140  */
1141 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1142 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1143 #ifdef CONFIG_PM
1144 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1145 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1146 #endif /* CONFIG_PM */
1147
1148 #endif /* RT2X00_H */