package/rt2x00/src/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     "2.0.10"
  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 RT2561s         0x0301  /* Turbo */
 163 #define RT2561          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          * When set to INVALID_INTERFACE, no interface is configured.
 298          */
 299         int type;
 300 #define INVALID_INTERFACE       IEEE80211_IF_TYPE_INVALID
 301
 302         /*
 303          * MAC of the device.
 304          */
 305         u8 mac[ETH_ALEN];
 306
 307         /*
 308          * BBSID of the AP to associate with.
 309          */
 310         u8 bssid[ETH_ALEN];
 311
 312         /*
 313          * Store the packet filter mode for the current interface.
 314          */
 315         unsigned int filter;
 316 };
 317
 318 static inline int is_interface_present(struct interface *intf)
 319 {
 320         return !!intf->id;
 321 }
 322
 323 static inline int is_interface_type(struct interface *intf, int type)
 324 {
 325         return intf->type == type;
 326 }
 327
 328 /*
 329  * Details about the supported modes, rates and channels
 330  * of a particular chipset. This is used by rt2x00lib
 331  * to build the ieee80211_hw_mode array for mac80211.
 332  */
 333 struct hw_mode_spec {
 334         /*
 335          * Number of modes, rates and channels.
 336          */
 337         int num_modes;
 338         int num_rates;
 339         int num_channels;
 340
 341         /*
 342          * txpower values.
 343          */
 344         const u8 *tx_power_a;
 345         const u8 *tx_power_bg;
 346         u8 tx_power_default;
 347
 348         /*
 349          * Device/chipset specific value.
 350          */
 351         const struct rf_channel *channels;
 352 };
 353
 354 /*
 355  * Configuration structure wrapper around the
 356  * mac80211 configuration structure.
 357  * When mac80211 configures the driver, rt2x00lib
 358  * can precalculate values which are equal for all
 359  * rt2x00 drivers. Those values can be stored in here.
 360  */
 361 struct rt2x00lib_conf {
 362         struct ieee80211_conf *conf;
 363         struct rf_channel rf;
 364
 365         int phymode;
 366
 367         int basic_rates;
 368         int slot_time;
 369
 370         short sifs;
 371         short pifs;
 372         short difs;
 373         short eifs;
 374 };
 375
 376 /*
 377  * rt2x00lib callback functions.
 378  */
 379 struct rt2x00lib_ops {
 380         /*
 381          * Interrupt handlers.
 382          */
 383         irq_handler_t irq_handler;
 384
 385         /*
 386          * Device init handlers.
 387          */
 388         int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
 389         char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
 390         int (*load_firmware) (struct rt2x00_dev *rt2x00dev, void *data,
 391                               const size_t len);
 392
 393         /*
 394          * Device initialization/deinitialization handlers.
 395          */
 396         int (*initialize) (struct rt2x00_dev *rt2x00dev);
 397         void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
 398
 399         /*
 400          * Radio control handlers.
 401          */
 402         int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
 403                                  enum dev_state state);
 404         int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
 405         void (*link_stats) (struct rt2x00_dev *rt2x00dev);
 406         void (*reset_tuner) (struct rt2x00_dev *rt2x00dev);
 407         void (*link_tuner) (struct rt2x00_dev *rt2x00dev);
 408
 409         /*
 410          * TX control handlers
 411          */
 412         void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev,
 413                                struct data_desc *txd,
 414                                struct txdata_entry_desc *desc,
 415                                struct ieee80211_hdr *ieee80211hdr,
 416                                unsigned int length,
 417                                struct ieee80211_tx_control *control);
 418         int (*write_tx_data) (struct rt2x00_dev *rt2x00dev,
 419                               struct data_ring *ring, struct sk_buff *skb,
 420                               struct ieee80211_tx_control *control);
 421         int (*get_tx_data_len) (struct rt2x00_dev *rt2x00dev,
 422                                 struct sk_buff *skb);
 423         void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev,
 424                                unsigned int queue);
 425
 426         /*
 427          * RX control handlers
 428          */
 429         void (*fill_rxdone) (struct data_entry *entry,
 430                              struct rxdata_entry_desc *desc);
 431
 432         /*
 433          * Configuration handlers.
 434          */
 435         void (*config_mac_addr) (struct rt2x00_dev *rt2x00dev, __le32 *mac);
 436         void (*config_bssid) (struct rt2x00_dev *rt2x00dev, __le32 *bssid);
 437         void (*config_type) (struct rt2x00_dev *rt2x00dev, const int type,
 438                                                            const int tsf_sync);
 439         void (*config_preamble) (struct rt2x00_dev *rt2x00dev,
 440                                  const int short_preamble,
 441                                  const int ack_timeout,
 442                                  const int ack_consume_time);
 443         void (*config) (struct rt2x00_dev *rt2x00dev, const unsigned int flags,
 444                         struct rt2x00lib_conf *libconf);
 445 #define CONFIG_UPDATE_PHYMODE           ( 1 << 1 )
 446 #define CONFIG_UPDATE_CHANNEL           ( 1 << 2 )
 447 #define CONFIG_UPDATE_TXPOWER           ( 1 << 3 )
 448 #define CONFIG_UPDATE_ANTENNA           ( 1 << 4 )
 449 #define CONFIG_UPDATE_SLOT_TIME         ( 1 << 5 )
 450 #define CONFIG_UPDATE_BEACON_INT        ( 1 << 6 )
 451 #define CONFIG_UPDATE_ALL               0xffff
 452 };
 453
 454 /*
 455  * rt2x00 driver callback operation structure.
 456  */
 457 struct rt2x00_ops {
 458         const char *name;
 459         const unsigned int rxd_size;
 460         const unsigned int txd_size;
 461         const unsigned int eeprom_size;
 462         const unsigned int rf_size;
 463         const struct rt2x00lib_ops *lib;
 464         const struct ieee80211_ops *hw;
 465 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 466         const struct rt2x00debug *debugfs;
 467 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 468 };
 469
 470 /*
 471  * rt2x00 device flags
 472  */
 473 enum rt2x00_flags {
 474         /*
 475          * Device state flags
 476          */
 477         DEVICE_PRESENT,
 478         DEVICE_REGISTERED_HW,
 479         DEVICE_INITIALIZED,
 480         DEVICE_STARTED,
 481         DEVICE_STARTED_SUSPEND,
 482         DEVICE_ENABLED_RADIO,
 483         DEVICE_DISABLED_RADIO_HW,
 484
 485         /*
 486          * Driver features
 487          */
 488         DRIVER_REQUIRE_FIRMWARE,
 489         DRIVER_REQUIRE_BEACON_RING,
 490
 491         /*
 492          * Driver configuration
 493          */
 494         CONFIG_SUPPORT_HW_BUTTON,
 495         CONFIG_FRAME_TYPE,
 496         CONFIG_RF_SEQUENCE,
 497         CONFIG_EXTERNAL_LNA_A,
 498         CONFIG_EXTERNAL_LNA_BG,
 499         CONFIG_DOUBLE_ANTENNA,
 500         CONFIG_DISABLE_LINK_TUNING,
 501         CONFIG_SHORT_PREAMBLE,
 502 };
 503
 504 /*
 505  * rt2x00 device structure.
 506  */
 507 struct rt2x00_dev {
 508         /*
 509          * Device structure.
 510          * The structure stored in here depends on the
 511          * system bus (PCI or USB).
 512          * When accessing this variable, the rt2x00dev_{pci,usb}
 513          * macro's should be used for correct typecasting.
 514          */
 515         void *dev;
 516 #define rt2x00dev_pci(__dev)    ( (struct pci_dev*)(__dev)->dev )
 517 #define rt2x00dev_usb(__dev)    ( (struct usb_interface*)(__dev)->dev )
 518
 519         /*
 520          * Callback functions.
 521          */
 522         const struct rt2x00_ops *ops;
 523
 524         /*
 525          * IEEE80211 control structure.
 526          */
 527         struct ieee80211_hw *hw;
 528         struct ieee80211_hw_mode *hwmodes;
 529         unsigned int curr_hwmode;
 530 #define HWMODE_B        0
 531 #define HWMODE_G        1
 532 #define HWMODE_A        2
 533
 534         /*
 535          * rfkill structure for RF state switching support.
 536          * This will only be compiled in when required.
 537          */
 538 #ifdef CONFIG_RT2X00_LIB_RFKILL
 539         struct rfkill *rfkill;
 540         struct input_polled_dev *poll_dev;
 541 #endif /* CONFIG_RT2X00_LIB_RFKILL */
 542
 543         /*
 544          * If enabled, the debugfs interface structures
 545          * required for deregistration of debugfs.
 546          */
 547 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 548         const struct rt2x00debug_intf *debugfs_intf;
 549 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 550
 551         /*
 552          * Device flags.
 553          * In these flags the current status and some
 554          * of the device capabilities are stored.
 555          */
 556         unsigned long flags;
 557
 558         /*
 559          * Chipset identification.
 560          */
 561         struct rt2x00_chip chip;
 562
 563         /*
 564          * hw capability specifications.
 565          */
 566         struct hw_mode_spec spec;
 567
 568         /*
 569          * Register pointers
 570          * csr_addr: Base register address. (PCI)
 571          * csr_cache: CSR cache for usb_control_msg. (USB)
 572          */
 573         void __iomem *csr_addr;
 574         void *csr_cache;
 575
 576         /*
 577          * Interface configuration.
 578          */
 579         struct interface interface;
 580
 581         /*
 582          * Link quality
 583          */
 584         struct link link;
 585
 586         /*
 587          * EEPROM data.
 588          */
 589         __le16 *eeprom;
 590
 591         /*
 592          * Active RF register values.
 593          * These are stored here so we don't need
 594          * to read the rf registers and can directly
 595          * use this value instead.
 596          * This field should be accessed by using
 597          * rt2x00_rf_read() and rt2x00_rf_write().
 598          */
 599         u32 *rf;
 600
 601         /*
 602          * USB Max frame size (for rt2500usb & rt73usb).
 603          */
 604         u16 usb_maxpacket;
 605
 606         /*
 607          * Current TX power value.
 608          */
 609         u16 tx_power;
 610
 611         /*
 612          * LED register (for rt61pci & rt73usb).
 613          */
 614         u16 led_reg;
 615
 616         /*
 617          * Led mode (LED_MODE_*)
 618          */
 619         u8 led_mode;
 620
 621         /*
 622          * Rssi <-> Dbm offset
 623          */
 624         u8 rssi_offset;
 625
 626         /*
 627          * Frequency offset (for rt61pci & rt73usb).
 628          */
 629         u8 freq_offset;
 630
 631         /*
 632          * Low level statistics which will have
 633          * to be kept up to date while device is running.
 634          */
 635         struct ieee80211_low_level_stats low_level_stats;
 636
 637         /*
 638          * RX configuration information.
 639          */
 640         struct ieee80211_rx_status rx_status;
 641
 642         /*
 643          * Scheduled work.
 644          */
 645         struct work_struct beacon_work;
 646         struct work_struct filter_work;
 647         struct work_struct config_work;
 648
 649         /*
 650          * Data ring arrays for RX, TX and Beacon.
 651          * The Beacon array also contains the Atim ring
 652          * if that is supported by the device.
 653          */
 654         int data_rings;
 655         struct data_ring *rx;
 656         struct data_ring *tx;
 657         struct data_ring *bcn;
 658
 659         /*
 660          * Firmware image.
 661          */
 662         const struct firmware *fw;
 663 };
 664
 665 /*
 666  * For-each loop for the ring array.
 667  * All rings have been allocated as a single array,
 668  * this means we can create a very simply loop macro
 669  * that is capable of looping through all rings.
 670  * ring_end(), txring_end() and ring_loop() are helper macro's which
 671  * should not be used directly. Instead the following should be used:
 672  * ring_for_each() - Loops through all rings (RX, TX, Beacon & Atim)
 673  * txring_for_each() - Loops through TX data rings (TX only)
 674  * txringall_for_each() - Loops through all TX rings (TX, Beacon & Atim)
 675  */
 676 #define ring_end(__dev) \
 677         &(__dev)->rx[(__dev)->data_rings]
 678
 679 #define txring_end(__dev) \
 680         &(__dev)->tx[(__dev)->hw->queues]
 681
 682 #define ring_loop(__entry, __start, __end)                      \
 683         for ((__entry) = (__start);                             \
 684              prefetch(&(__entry)[1]), (__entry) != (__end);     \
 685              (__entry) = &(__entry)[1])
 686
 687 #define ring_for_each(__dev, __entry) \
 688         ring_loop(__entry, (__dev)->rx, ring_end(__dev))
 689
 690 #define txring_for_each(__dev, __entry) \
 691         ring_loop(__entry, (__dev)->tx, txring_end(__dev))
 692
 693 #define txringall_for_each(__dev, __entry) \
 694         ring_loop(__entry, (__dev)->tx, ring_end(__dev))
 695
 696 /*
 697  * Generic RF access.
 698  * The RF is being accessed by word index.
 699  */
 700 static inline void rt2x00_rf_read(const struct rt2x00_dev *rt2x00dev,
 701                                   const unsigned int word, u32 *data)
 702 {
 703         *data = rt2x00dev->rf[word];
 704 }
 705
 706 static inline void rt2x00_rf_write(const struct rt2x00_dev *rt2x00dev,
 707                                    const unsigned int word, u32 data)
 708 {
 709         rt2x00dev->rf[word] = data;
 710 }
 711
 712 /*
 713  *  Generic EEPROM access.
 714  * The EEPROM is being accessed by word index.
 715  */
 716 static inline void *rt2x00_eeprom_addr(const struct rt2x00_dev *rt2x00dev,
 717                                        const unsigned int word)
 718 {
 719         return (void *)&rt2x00dev->eeprom[word];
 720 }
 721
 722 static inline void rt2x00_eeprom_read(const struct rt2x00_dev *rt2x00dev,
 723                                       const unsigned int word, u16 *data)
 724 {
 725         *data = le16_to_cpu(rt2x00dev->eeprom[word]);
 726 }
 727
 728 static inline void rt2x00_eeprom_write(const struct rt2x00_dev *rt2x00dev,
 729                                        const unsigned int word, u16 data)
 730 {
 731         rt2x00dev->eeprom[word] = cpu_to_le16(data);
 732 }
 733
 734 /*
 735  * Chipset handlers
 736  */
 737 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
 738                                    const u16 rt, const u16 rf, const u32 rev)
 739 {
 740         INFO(rt2x00dev,
 741              "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n",
 742              rt, rf, rev);
 743
 744         rt2x00dev->chip.rt = rt;
 745         rt2x00dev->chip.rf = rf;
 746         rt2x00dev->chip.rev = rev;
 747 }
 748
 749 static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip)
 750 {
 751         return (chipset->rt == chip);
 752 }
 753
 754 static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip)
 755 {
 756         return (chipset->rf == chip);
 757 }
 758
 759 static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset)
 760 {
 761         return chipset->rev;
 762 }
 763
 764 static inline u16 rt2x00_check_rev(const struct rt2x00_chip *chipset,
 765                                    const u32 rev)
 766 {
 767         return (((chipset->rev & 0xffff0) == rev) &&
 768                 !!(chipset->rev & 0x0000f));
 769 }
 770
 771 /*
 772  * Duration calculations
 773  * The rate variable passed is: 100kbs.
 774  * To convert from bytes to bits we multiply size with 8,
 775  * then the size is multiplied with 10 to make the
 776  * real rate -> rate argument correction.
 777  */
 778 static inline u16 get_duration(const unsigned int size, const u8 rate)
 779 {
 780         return ((size * 8 * 10) / rate);
 781 }
 782
 783 static inline u16 get_duration_res(const unsigned int size, const u8 rate)
 784 {
 785         return ((size * 8 * 10) % rate);
 786 }
 787
 788 /*
 789  * Library functions.
 790  */
 791 struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
 792                                      const unsigned int queue);
 793
 794 /*
 795  * Interrupt context handlers.
 796  */
 797 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
 798 void rt2x00lib_txdone(struct data_entry *entry,
 799                       const int status, const int retry);
 800 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
 801                       struct rxdata_entry_desc *desc);
 802
 803 /*
 804  * TX descriptor initializer
 805  */
 806 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 807                              struct data_desc *txd,
 808                              struct ieee80211_hdr *ieee80211hdr,
 809                              unsigned int length,
 810                              struct ieee80211_tx_control *control);
 811
 812 /*
 813  * mac80211 handlers.
 814  */
 815 int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb,
 816                  struct ieee80211_tx_control *control);
 817 int rt2x00mac_start(struct ieee80211_hw *hw);
 818 void rt2x00mac_stop(struct ieee80211_hw *hw);
 819 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
 820                             struct ieee80211_if_init_conf *conf);
 821 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
 822                                 struct ieee80211_if_init_conf *conf);
 823 int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf);
 824 int rt2x00mac_config_interface(struct ieee80211_hw *hw, int if_id,
 825                                struct ieee80211_if_conf *conf);
 826 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
 827                         struct ieee80211_low_level_stats *stats);
 828 int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw,
 829                            struct ieee80211_tx_queue_stats *stats);
 830 void rt2x00mac_erp_ie_changed(struct ieee80211_hw *hw, u8 changes,
 831                               int cts_protection, int preamble);
 832 int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue,
 833                       const struct ieee80211_tx_queue_params *params);
 834
 835 /*
 836  * Driver allocation handlers.
 837  */
 838 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
 839 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
 840 #ifdef CONFIG_PM
 841 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
 842 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
 843 #endif /* CONFIG_PM */
 844
 845 #endif /* RT2X00_H */