drivers/net/wireless/rt2x00/rt2x00.h

   1 /*
   2         Copyright (C) 2004 - 2007 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/prefetch.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/workqueue.h>
  33 #include <linux/firmware.h>
  34
  35 #include <net/mac80211.h>
  36
  37 #include "rt2x00debug.h"
  38 #include "rt2x00reg.h"
  39 #include "rt2x00ring.h"
  40
  41 /*
  42  * Module information.
  43  * DRV_NAME should be set within the individual module source files.
  44  */
  45 #define DRV_VERSION     "2.0.8"
  46 #define DRV_PROJECT     "http://rt2x00.serialmonkey.com"
  47
  48 /*
  49  * Debug definitions.
  50  * Debug output has to be enabled during compile time.
  51  */
  52 #define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...)     \
  53         printk(__kernlvl "%s -> %s: %s - " __msg,                       \
  54                wiphy_name((__dev)->hw->wiphy), __FUNCTION__, __lvl, ##__args)
  55
  56 #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...)  \
  57         printk(__kernlvl "%s -> %s: %s - " __msg,               \
  58                DRV_NAME, __FUNCTION__, __lvl, ##__args)
  59
  60 #ifdef CONFIG_RT2X00_DEBUG
  61 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  62         DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args);
  63 #else
  64 #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
  65         do { } while (0)
  66 #endif /* CONFIG_RT2X00_DEBUG */
  67
  68 /*
  69  * Various debug levels.
  70  * The debug levels PANIC and ERROR both indicate serious problems,
  71  * for this reason they should never be ignored.
  72  * The special ERROR_PROBE message is for messages that are generated
  73  * when the rt2x00_dev is not yet initialized.
  74  */
  75 #define PANIC(__dev, __msg, __args...) \
  76         DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args)
  77 #define ERROR(__dev, __msg, __args...)  \
  78         DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args)
  79 #define ERROR_PROBE(__msg, __args...) \
  80         DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args)
  81 #define WARNING(__dev, __msg, __args...) \
  82         DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args)
  83 #define NOTICE(__dev, __msg, __args...) \
  84         DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args)
  85 #define INFO(__dev, __msg, __args...) \
  86         DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args)
  87 #define DEBUG(__dev, __msg, __args...) \
  88         DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args)
  89 #define EEPROM(__dev, __msg, __args...) \
  90         DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args)
  91
  92 /*
  93  * Ring sizes.
  94  * Ralink PCI devices demand the Frame size to be a multiple of 128 bytes.
  95  * DATA_FRAME_SIZE is used for TX, RX, ATIM and PRIO rings.
  96  * MGMT_FRAME_SIZE is used for the BEACON ring.
  97  */
  98 #define DATA_FRAME_SIZE 2432
  99 #define MGMT_FRAME_SIZE 256
 100
 101 /*
 102  * Number of entries in a packet ring.
 103  * PCI devices only need 1 Beacon entry,
 104  * but USB devices require a second because they
 105  * have to send a Guardian byte first.
 106  */
 107 #define RX_ENTRIES      12
 108 #define TX_ENTRIES      12
 109 #define ATIM_ENTRIES    1
 110 #define BEACON_ENTRIES  2
 111
 112 /*
 113  * Standard timing and size defines.
 114  * These values should follow the ieee80211 specifications.
 115  */
 116 #define ACK_SIZE                14
 117 #define IEEE80211_HEADER        24
 118 #define PLCP                    48
 119 #define BEACON                  100
 120 #define PREAMBLE                144
 121 #define SHORT_PREAMBLE          72
 122 #define SLOT_TIME               20
 123 #define SHORT_SLOT_TIME         9
 124 #define SIFS                    10
 125 #define PIFS                    ( SIFS + SLOT_TIME )
 126 #define SHORT_PIFS              ( SIFS + SHORT_SLOT_TIME )
 127 #define DIFS                    ( PIFS + SLOT_TIME )
 128 #define SHORT_DIFS              ( SHORT_PIFS + SHORT_SLOT_TIME )
 129 #define EIFS                    ( SIFS + (8 * (IEEE80211_HEADER + ACK_SIZE)) )
 130
 131 /*
 132  * IEEE802.11 header defines
 133  */
 134 static inline int is_rts_frame(u16 fc)
 135 {
 136         return !!(((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 137                   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_RTS));
 138 }
 139
 140 static inline int is_cts_frame(u16 fc)
 141 {
 142         return !!(((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
 143                   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_CTS));
 144 }
 145
 146 static inline int is_probe_resp(u16 fc)
 147 {
 148         return !!(((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) &&
 149                   ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP));
 150 }
 151
 152 /*
 153  * Chipset identification
 154  * The chipset on the device is composed of a RT and RF chip.
 155  * The chipset combination is important for determining device capabilities.
 156  */
 157 struct rt2x00_chip {
 158         u16 rt;
 159 #define RT2460          0x0101
 160 #define RT2560          0x0201
 161 #define RT2570          0x1201
 162 #define RT2561          0x0301
 163 #define RT2561s         0x0302
 164 #define RT2661          0x0401
 165 #define RT2571          0x1300
 166
 167         u16 rf;
 168         u32 rev;
 169 };
 170
 171 /*
 172  * RF register values that belong to a particular channel.
 173  */
 174 struct rf_channel {
 175         int channel;
 176         u32 rf1;
 177         u32 rf2;
 178         u32 rf3;
 179         u32 rf4;
 180 };
 181
 182 /*
 183  * To optimize the quality of the link we need to store
 184  * the quality of received frames and periodically
 185  * optimize the link.
 186  */
 187 struct link {
 188         /*
 189          * Link tuner counter
 190          * The number of times the link has been tuned
 191          * since the radio has been switched on.
 192          */
 193         u32 count;
 194
 195         /*
 196          * Statistics required for Link tuning.
 197          * For the average RSSI value we use the "Walking average" approach.
 198          * When adding RSSI to the average value the following calculation
 199          * is needed:
 200          *
 201          *        avg_rssi = ((avg_rssi * 7) + rssi) / 8;
 202          *
 203          * The advantage of this approach is that we only need 1 variable
 204          * to store the average in (No need for a count and a total).
 205          * But more importantly, normal average values will over time
 206          * move less and less towards newly added values this results
 207          * that with link tuning, the device can have a very good RSSI
 208          * for a few minutes but when the device is moved away from the AP
 209          * the average will not decrease fast enough to compensate.
 210          * The walking average compensates this and will move towards
 211          * the new values correctly allowing a effective link tuning.
 212          */
 213         int avg_rssi;
 214         int vgc_level;
 215         int false_cca;
 216
 217         /*
 218          * Statistics required for Signal quality calculation.
 219          * For calculating the Signal quality we have to determine
 220          * the total number of success and failed RX and TX frames.
 221          * After that we also use the average RSSI value to help
 222          * determining the signal quality.
 223          * For the calculation we will use the following algorithm:
 224          *
 225          *         rssi_percentage = (avg_rssi * 100) / rssi_offset
 226          *         rx_percentage = (rx_success * 100) / rx_total
 227          *         tx_percentage = (tx_success * 100) / tx_total
 228          *         avg_signal = ((WEIGHT_RSSI * avg_rssi) +
 229          *                       (WEIGHT_TX * tx_percentage) +
 230          *                       (WEIGHT_RX * rx_percentage)) / 100
 231          *
 232          * This value should then be checked to not be greated then 100.
 233          */
 234         int rx_percentage;
 235         int rx_success;
 236         int rx_failed;
 237         int tx_percentage;
 238         int tx_success;
 239         int tx_failed;
 240 #define WEIGHT_RSSI     20
 241 #define WEIGHT_RX       40
 242 #define WEIGHT_TX       40
 243
 244         /*
 245          * Work structure for scheduling periodic link tuning.
 246          */
 247         struct delayed_work work;
 248 };
 249
 250 /*
 251  * Clear all counters inside the link structure.
 252  * This can be easiest achieved by memsetting everything
 253  * except for the work structure at the end.
 254  */
 255 static inline void rt2x00_clear_link(struct link *link)
 256 {
 257         memset(link, 0x00, sizeof(*link) - sizeof(link->work));
 258         link->rx_percentage = 50;
 259         link->tx_percentage = 50;
 260 }
 261
 262 /*
 263  * Update the rssi using the walking average approach.
 264  */
 265 static inline void rt2x00_update_link_rssi(struct link *link, int rssi)
 266 {
 267         if (!link->avg_rssi)
 268                 link->avg_rssi = rssi;
 269         else
 270                 link->avg_rssi = ((link->avg_rssi * 7) + rssi) / 8;
 271 }
 272
 273 /*
 274  * When the avg_rssi is unset or no frames  have been received),
 275  * we need to return the default value which needs to be less
 276  * than -80 so the device will select the maximum sensitivity.
 277  */
 278 static inline int rt2x00_get_link_rssi(struct link *link)
 279 {
 280         return (link->avg_rssi && link->rx_success) ? link->avg_rssi : -128;
 281 }
 282
 283 /*
 284  * Interface structure
 285  * Configuration details about the current interface.
 286  */
 287 struct interface {
 288         /*
 289          * Interface identification. The value is assigned
 290          * to us by the 80211 stack, and is used to request
 291          * new beacons.
 292          */
 293         int id;
 294
 295         /*
 296          * Current working type (IEEE80211_IF_TYPE_*).
 297          * This excludes the type IEEE80211_IF_TYPE_MNTR
 298          * since that is counted seperately in the monitor_count
 299          * field.
 300          * When set to INVALID_INTERFACE, no interface is configured.
 301          */
 302         int type;
 303 #define INVALID_INTERFACE       IEEE80211_IF_TYPE_MGMT
 304
 305         /*
 306          * MAC of the device.
 307          */
 308         u8 mac[ETH_ALEN];
 309
 310         /*
 311          * BBSID of the AP to associate with.
 312          */
 313         u8 bssid[ETH_ALEN];
 314
 315         /*
 316          * Store the packet filter mode for the current interface.
 317          * monitor mode always disabled filtering. But in such
 318          * cases we still need to store the value here in case
 319          * the monitor mode interfaces are removed, while a
 320          * non-monitor mode interface remains.
 321          */
 322         unsigned short filter;
 323
 324         /*
 325          * Monitor mode count, the number of interfaces
 326          * in monitor mode that that have been added.
 327          */
 328         unsigned short monitor_count;
 329 };
 330
 331 static inline int is_interface_present(struct interface *intf)
 332 {
 333         return !!intf->id;
 334 }
 335
 336 static inline int is_monitor_present(struct interface *intf)
 337 {
 338         return !!intf->monitor_count;
 339 }
 340
 341 /*
 342  * Details about the supported modes, rates and channels
 343  * of a particular chipset. This is used by rt2x00lib
 344  * to build the ieee80211_hw_mode array for mac80211.
 345  */
 346 struct hw_mode_spec {
 347         /*
 348          * Number of modes, rates and channels.
 349          */
 350         int num_modes;
 351         int num_rates;
 352         int num_channels;
 353
 354         /*
 355          * txpower values.
 356          */
 357         const u8 *tx_power_a;
 358         const u8 *tx_power_bg;
 359         u8 tx_power_default;
 360
 361         /*
 362          * Device/chipset specific value.
 363          */
 364         const struct rf_channel *channels;
 365 };
 366
 367 /*
 368  * rt2x00lib callback functions.
 369  */
 370 struct rt2x00lib_ops {
 371         /*
 372          * Interrupt handlers.
 373          */
 374         irq_handler_t irq_handler;
 375
 376         /*
 377          * Device init handlers.
 378          */
 379         int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
 380         char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
 381         int (*load_firmware) (struct rt2x00_dev *rt2x00dev, void *data,
 382                               const size_t len);
 383
 384         /*
 385          * Device initialization/deinitialization handlers.
 386          */
 387         int (*initialize) (struct rt2x00_dev *rt2x00dev);
 388         void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 389
 390         /*
 391          * Radio control handlers.
 392          */
 393         int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
 394                                  enum dev_state state);
 395         int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
 396         void (*link_stats) (struct rt2x00_dev *rt2x00dev);
 397         void (*reset_tuner) (struct rt2x00_dev *rt2x00dev);
 398         void (*link_tuner) (struct rt2x00_dev *rt2x00dev);
 399
 400         /*
 401          * TX control handlers
 402          */
 403         void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
 404                                struct data_desc *txd,
 405                                struct data_entry_desc *desc,
 406                                struct ieee80211_hdr *ieee80211hdr,
 407                                unsigned int length,
 408                                struct ieee80211_tx_control *control);
 409         int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
 410                               struct data_ring *ring, struct sk_buff *skb,
 411                               struct ieee80211_tx_control *control);
 412         void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
 413                                unsigned int queue);
 414
 415         /*
 416          * RX control handlers
 417          */
 418         int (*fill_rxdone) (struct data_entry *entry,
 419                             int *signal, int *rssi, int *ofdm, int *size);
 420
 421         /*
 422          * Configuration handlers.
 423          */
 424         void (*config_mac_addr) (struct rt2x00_dev *rt2x00dev, u8 *mac);
 425         void (*config_bssid) (struct rt2x00_dev *rt2x00dev, u8 *bssid);
 426         void (*config_packet_filter) (struct rt2x00_dev *rt2x00dev,
 427                                       const unsigned int filter);
 428         void (*config_type) (struct rt2x00_dev *rt2x00dev, const int type);
 429         void (*config) (struct rt2x00_dev *rt2x00dev, const unsigned int flags,
 430                         struct ieee80211_conf *conf);
 431 #define CONFIG_UPDATE_PHYMODE           ( 1 << 1 )
 432 #define CONFIG_UPDATE_CHANNEL           ( 1 << 2 )
 433 #define CONFIG_UPDATE_TXPOWER           ( 1 << 3 )
 434 #define CONFIG_UPDATE_ANTENNA           ( 1 << 4 )
 435 #define CONFIG_UPDATE_SLOT_TIME         ( 1 << 5 )
 436 #define CONFIG_UPDATE_BEACON_INT        ( 1 << 6 )
 437 #define CONFIG_UPDATE_ALL               0xffff
 438 };
 439
 440 /*
 441  * rt2x00 driver callback operation structure.
 442  */
 443 struct rt2x00_ops {
 444         const char *name;
 445         const unsigned int rxd_size;
 446         const unsigned int txd_size;
 447         const unsigned int eeprom_size;
 448         const unsigned int rf_size;
 449         const struct rt2x00lib_ops *lib;
 450         const struct ieee80211_ops *hw;
 451 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 452         const struct rt2x00debug *debugfs;
 453 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 454 };
 455
 456 /*
 457  * rt2x00 device structure.
 458  */
 459 struct rt2x00_dev {
 460         /*
 461          * Device structure.
 462          * The structure stored in here depends on the
 463          * system bus (PCI or USB).
 464          * When accessing this variable, the rt2x00dev_{pci,usb}
 465          * macro's should be used for correct typecasting.
 466          */
 467         void *dev;
 468 #define rt2x00dev_pci(__dev)    ( (struct pci_dev*)(__dev)->dev )
 469 #define rt2x00dev_usb(__dev)    ( (struct usb_interface*)(__dev)->dev )
 470
 471         /*
 472          * Callback functions.
 473          */
 474         const struct rt2x00_ops *ops;
 475
 476         /*
 477          * IEEE80211 control structure.
 478          */
 479         struct ieee80211_hw *hw;
 480         struct ieee80211_hw_mode *hwmodes;
 481         unsigned int curr_hwmode;
 482 #define HWMODE_B        0
 483 #define HWMODE_G        1
 484 #define HWMODE_A        2
 485
 486         /*
 487          * rfkill structure for RF state switching support.
 488          * This will only be compiled in when required.
 489          */
 490 #ifdef CONFIG_RT2X00_LIB_RFKILL
 491         struct rfkill *rfkill;
 492         struct input_polled_dev *poll_dev;
 493 #endif /* CONFIG_RT2X00_LIB_RFKILL */
 494
 495         /*
 496          * If enabled, the debugfs interface structures
 497          * required for deregistration of debugfs.
 498          */
 499 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 500         const struct rt2x00debug_intf *debugfs_intf;
 501 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 502
 503         /*
 504          * Device flags.
 505          * In these flags the current status and some
 506          * of the device capabilities are stored.
 507          */
 508         unsigned long flags;
 509 #define DEVICE_ENABLED_RADIO            1
 510 #define DEVICE_ENABLED_RADIO_HW         2
 511 #define DEVICE_INITIALIZED              3
 512 #define DEVICE_INITIALIZED_HW           4
 513 #define REQUIRE_FIRMWARE                5
 514 #define PACKET_FILTER_SCHEDULED         6
 515 #define PACKET_FILTER_PENDING           7
 516 #define INTERFACE_RESUME                8
 517 #define INTERFACE_ENABLED               9
 518 #define INTERFACE_ENABLED_MONITOR       10
 519 #define REQUIRE_BEACON_RING             11
 520 #define DEVICE_SUPPORT_HW_BUTTON        12
 521 #define CONFIG_FRAME_TYPE               13
 522 #define CONFIG_RF_SEQUENCE              14
 523 /* Hole: Add new Flag here */
 524 #define CONFIG_EXTERNAL_LNA_A           16
 525 #define CONFIG_EXTERNAL_LNA_BG          17
 526 #define CONFIG_DOUBLE_ANTENNA           18
 527 #define CONFIG_DISABLE_LINK_TUNING      19
 528
 529         /*
 530          * Chipset identification.
 531          */
 532         struct rt2x00_chip chip;
 533
 534         /*
 535          * hw capability specifications.
 536          */
 537         struct hw_mode_spec spec;
 538
 539         /*
 540          * Register pointers
 541          * csr_addr: Base register address. (PCI)
 542          * csr_cache: CSR cache for usb_control_msg. (USB)
 543          */
 544         void __iomem *csr_addr;
 545         void *csr_cache;
 546
 547         /*
 548          * Interface configuration.
 549          */
 550         struct interface interface;
 551
 552         /*
 553          * Link quality
 554          */
 555         struct link link;
 556
 557         /*
 558          * EEPROM data.
 559          */
 560         __le16 *eeprom;
 561
 562         /*
 563          * Active RF register values.
 564          * These are stored here so we don't need
 565          * to read the rf registers and can directly
 566          * use this value instead.
 567          * This field should be accessed by using
 568          * rt2x00_rf_read() and rt2x00_rf_write().
 569          */
 570         u32 *rf;
 571
 572         /*
 573          * Current TX power value.
 574          */
 575         u16 tx_power;
 576
 577         /*
 578          * LED register (for rt61pci & rt73usb).
 579          */
 580         u16 led_reg;
 581
 582         /*
 583          * Led mode (LED_MODE_*)
 584          */
 585         u8 led_mode;
 586
 587         /*
 588          * Rssi <-> Dbm offset
 589          */
 590         u8 rssi_offset;
 591
 592         /*
 593          * Frequency offset (for rt61pci & rt73usb).
 594          */
 595         u8 freq_offset;
 596
 597         /*
 598          * Low level statistics which will have
 599          * to be kept up to date while device is running.
 600          */
 601         struct ieee80211_low_level_stats low_level_stats;
 602
 603         /*
 604          * RX configuration information.
 605          */
 606         struct ieee80211_rx_status rx_status;
 607
 608         /*
 609          * Beacon scheduled work.
 610          */
 611         struct work_struct beacon_work;
 612
 613         /*
 614          * Data ring arrays for RX, TX and Beacon.
 615          * The Beacon array also contains the Atim ring
 616          * if that is supported by the device.
 617          */
 618         int data_rings;
 619         struct data_ring *rx;
 620         struct data_ring *tx;
 621         struct data_ring *bcn;
 622
 623         /*
 624          * Firmware image.
 625          */
 626         const struct firmware *fw;
 627 };
 628
 629 /*
 630  * For-each loop for the ring array.
 631  * All rings have been allocated as a single array,
 632  * this means we can create a very simply loop macro
 633  * that is capable of looping through all rings.
 634  * ring_end(), txring_end() and ring_loop() are helper macro's which
 635  * should not be used directly. Instead the following should be used:
 636  * ring_for_each() - Loops through all rings (RX, TX, Beacon & Atim)
 637  * txring_for_each() - Loops through TX data rings (TX only)
 638  * txringall_for_each() - Loops through all TX rings (TX, Beacon & Atim)
 639  */
 640 #define ring_end(__dev) \
 641         &(__dev)->rx[(__dev)->data_rings]
 642
 643 #define txring_end(__dev) \
 644         &(__dev)->tx[(__dev)->hw->queues]
 645
 646 #define ring_loop(__entry, __start, __end)                      \
 647         for ((__entry) = (__start);                             \
 648              prefetch(&(__entry)[1]), (__entry) != (__end);     \
 649              (__entry) = &(__entry)[1])
 650
 651 #define ring_for_each(__dev, __entry) \
 652         ring_loop(__entry, (__dev)->rx, ring_end(__dev))
 653
 654 #define txring_for_each(__dev, __entry) \
 655         ring_loop(__entry, (__dev)->tx, txring_end(__dev))
 656
 657 #define txringall_for_each(__dev, __entry) \
 658         ring_loop(__entry, (__dev)->tx, ring_end(__dev))
 659
 660 /*
 661  * Generic RF access.
 662  * The RF is being accessed by word index.
 663  */
 664 static inline void rt2x00_rf_read(const struct rt2x00_dev *rt2x00dev,
 665                                   const unsigned int word, u32 *data)
 666 {
 667         *data = rt2x00dev->rf[word];
 668 }
 669
 670 static inline void rt2x00_rf_write(const struct rt2x00_dev *rt2x00dev,
 671                                    const unsigned int word, u32 data)
 672 {
 673         rt2x00dev->rf[word] = data;
 674 }
 675
 676 /*
 677  *  Generic EEPROM access.
 678  * The EEPROM is being accessed by word index.
 679  */
 680 static inline void *rt2x00_eeprom_addr(const struct rt2x00_dev *rt2x00dev,
 681                                        const unsigned int word)
 682 {
 683         return (void *)&rt2x00dev->eeprom[word];
 684 }
 685
 686 static inline void rt2x00_eeprom_read(const struct rt2x00_dev *rt2x00dev,
 687                                       const unsigned int word, u16 *data)
 688 {
 689         *data = le16_to_cpu(rt2x00dev->eeprom[word]);
 690 }
 691
 692 static inline void rt2x00_eeprom_write(const struct rt2x00_dev *rt2x00dev,
 693                                        const unsigned int word, u16 data)
 694 {
 695         rt2x00dev->eeprom[word] = cpu_to_le16(data);
 696 }
 697
 698 /*
 699  * Chipset handlers
 700  */
 701 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
 702                                    const u16 rt, const u16 rf, const u32 rev)
 703 {
 704         INFO(rt2x00dev,
 705              "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n",
 706              rt, rf, rev);
 707
 708         rt2x00dev->chip.rt = rt;
 709         rt2x00dev->chip.rf = rf;
 710         rt2x00dev->chip.rev = rev;
 711 }
 712
 713 static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip)
 714 {
 715         return (chipset->rt == chip);
 716 }
 717
 718 static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip)
 719 {
 720         return (chipset->rf == chip);
 721 }
 722
 723 static inline u16 rt2x00_get_rev(const struct rt2x00_chip *chipset)
 724 {
 725         return chipset->rev;
 726 }
 727
 728 static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset, const u32 mask)
 729 {
 730         return chipset->rev & mask;
 731 }
 732
 733 /*
 734  * Duration calculations
 735  * The rate variable passed is: 100kbs.
 736  * To convert from bytes to bits we multiply size with 8,
 737  * then the size is multiplied with 10 to make the
 738  * real rate -> rate argument correction.
 739  */
 740 static inline u16 get_duration(const unsigned int size, const u8 rate)
 741 {
 742         return ((size * 8 * 10) / rate);
 743 }
 744
 745 static inline u16 get_duration_res(const unsigned int size, const u8 rate)
 746 {
 747         return ((size * 8 * 10) % rate);
 748 }
 749
 750 /*
 751  * Library functions.
 752  */
 753 struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
 754                                      const unsigned int queue);
 755
 756 /*
 757  * Interrupt context handlers.
 758  */
 759 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
 760 void rt2x00lib_txdone(struct data_entry *entry,
 761                       const int status, const int retry);
 762 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 763                       const int signal, const int rssi, const int ofdm);
 764
 765 /*
 766  * TX descriptor initializer
 767  */
 768 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 769                              struct data_desc *txd,
 770                              struct ieee80211_hdr *ieee80211hdr,
 771                              unsigned int length,
 772                              struct ieee80211_tx_control *control);
 773
 774 /*
 775  * mac80211 handlers.
 776  */
 777 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 778                  struct ieee80211_tx_control *control);
 779 int rt2x00mac_start(struct ieee80211_hw *hw);
 780 void rt2x00mac_stop(struct ieee80211_hw *hw);
 781 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
 782                             struct ieee80211_if_init_conf *conf);
 783 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
 784                                 struct ieee80211_if_init_conf *conf);
 785 int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
 786 int rt2x00mac_config_interface(struct ieee80211_hw *hw, int if_id,
 787                                struct ieee80211_if_conf *conf);
 788 void rt2x00mac_set_multicast_list(struct ieee80211_hw *hw,
 789                                   unsigned short flags, int mc_count);
 790 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
 791                         struct ieee80211_low_level_stats *stats);
 792 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
 793                            struct ieee80211_tx_queue_stats *stats);
 794 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
 795                       const struct ieee80211_tx_queue_params *params);
 796
 797 /*
 798  * Driver allocation handlers.
 799  */
 800 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
 801 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
 802 #ifdef CONFIG_PM
 803 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
 804 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
 805 #endif /* CONFIG_PM */
 806
 807 #endif /* RT2X00_H */