package/rt2x00/src/rt2x00dev.c

   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: rt2x00lib
  23         Abstract: rt2x00 generic device routines.
  24         Supported chipsets: RT2460, RT2560, RT2570,
  25         rt2561, rt2561s, rt2661, rt2571W & rt2671.
  26  */
  27
  28 /*
  29  * Set enviroment defines for rt2x00.h
  30  */
  31 #define DRV_NAME "rt2x00lib"
  32
  33 #include <linux/kernel.h>
  34 #include <linux/module.h>
  35 #include <linux/version.h>
  36 #include <linux/init.h>
  37 #include <linux/delay.h>
  38 #include <linux/etherdevice.h>
  39
  40 #include "rt2x00.h"
  41 #include "rt2x00lib.h"
  42 #include "rt2x00dev.h"
  43
  44 /*
  45  * Radio control handlers.
  46  */
  47 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
  48 {
  49         int status;
  50
  51         /*
  52          * Don't enable the radio twice.
  53          * or if the hardware button has been disabled.
  54          */
  55         if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
  56             (test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags) &&
  57              !test_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags)))
  58                 return 0;
  59
  60         status = rt2x00dev->ops->lib->set_device_state(
  61                 rt2x00dev, STATE_RADIO_ON);
  62         if (status)
  63                 return status;
  64
  65         __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
  66
  67         rt2x00lib_toggle_rx(rt2x00dev, 1);
  68
  69         ieee80211_start_queues(rt2x00dev->hw);
  70
  71         if (is_interface_present(&rt2x00dev->interface))
  72                 rt2x00_start_link_tune(rt2x00dev);
  73
  74         return 0;
  75 }
  76
  77 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
  78 {
  79         if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
  80                 return;
  81
  82         rt2x00_stop_link_tune(rt2x00dev);
  83
  84         ieee80211_stop_queues(rt2x00dev->hw);
  85
  86         rt2x00lib_toggle_rx(rt2x00dev, 0);
  87
  88         rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
  89 }
  90
  91 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, int enable)
  92 {
  93         /*
  94          * When we are disabling the rx, we should also stop the link tuner.
  95          */
  96         if (!enable)
  97                 rt2x00_stop_link_tune(rt2x00dev);
  98
  99         rt2x00dev->ops->lib->set_device_state(rt2x00dev,
 100                 enable ? STATE_RADIO_RX_ON : STATE_RADIO_RX_OFF);
 101
 102         /*
 103          * When we are enabling the rx, we should also start the link tuner.
 104          */
 105         if (enable && is_interface_present(&rt2x00dev->interface))
 106                 rt2x00_start_link_tune(rt2x00dev);
 107 }
 108
 109 static void rt2x00lib_link_tuner(struct work_struct *work)
 110 {
 111         struct rt2x00_dev *rt2x00dev =
 112                 container_of(work, struct rt2x00_dev, link.work.work);
 113
 114         /*
 115          * Update promisc mode (this function will first check
 116          * if updating is really required).
 117          */
 118         rt2x00lib_config_promisc(rt2x00dev, rt2x00dev->interface.promisc);
 119
 120         /*
 121          * Cancel all link tuning if the eeprom has indicated
 122          * it is not required.
 123          */
 124         if (test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
 125                 return;
 126
 127         rt2x00dev->ops->lib->link_tuner(rt2x00dev);
 128
 129         /*
 130          * Increase tuner counter, and reschedule the next link tuner run.
 131          */
 132         rt2x00dev->link.count++;
 133         queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
 134                 LINK_TUNE_INTERVAL);
 135 }
 136
 137 /*
 138  * Config handlers
 139  */
 140 void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, const int type)
 141 {
 142         if (!(is_interface_present(&rt2x00dev->interface) ^
 143               test_bit(INTERFACE_ENABLED, &rt2x00dev->flags)) &&
 144             !(is_monitor_present(&rt2x00dev->interface) ^
 145               test_bit(INTERFACE_ENABLED_MONITOR, &rt2x00dev->flags)))
 146                 return;
 147
 148         rt2x00dev->ops->lib->config_type(rt2x00dev, type);
 149
 150         if (type != IEEE80211_IF_TYPE_MNTR) {
 151                 if (is_interface_present(&rt2x00dev->interface))
 152                         __set_bit(INTERFACE_ENABLED, &rt2x00dev->flags);
 153                 else
 154                         __clear_bit(INTERFACE_ENABLED, &rt2x00dev->flags);
 155         } else {
 156                 if (is_monitor_present(&rt2x00dev->interface))
 157                         __set_bit(INTERFACE_ENABLED_MONITOR,
 158                                 &rt2x00dev->flags);
 159                 else
 160                         __clear_bit(INTERFACE_ENABLED_MONITOR,
 161                                 &rt2x00dev->flags);
 162         }
 163 }
 164
 165 void rt2x00lib_config_phymode(struct rt2x00_dev *rt2x00dev, const int phymode)
 166 {
 167         if (rt2x00dev->rx_status.phymode == phymode)
 168                 return;
 169
 170         rt2x00dev->ops->lib->config_phymode(rt2x00dev, phymode);
 171
 172         rt2x00dev->rx_status.phymode = phymode;
 173 }
 174
 175 void rt2x00lib_config_channel(struct rt2x00_dev *rt2x00dev, const int value,
 176         const int channel, const int freq, const int txpower)
 177 {
 178         if (channel == rt2x00dev->rx_status.channel)
 179                 return;
 180
 181         rt2x00dev->ops->lib->config_channel(rt2x00dev, value, channel, txpower);
 182
 183         INFO(rt2x00dev, "Switching channel. "
 184                 "RF1: 0x%08x, RF2: 0x%08x, RF3: 0x%08x, RF3: 0x%08x.\n",
 185                 rt2x00dev->rf1, rt2x00dev->rf2,
 186                 rt2x00dev->rf3, rt2x00dev->rf4);
 187
 188         rt2x00dev->rx_status.freq = freq;
 189         rt2x00dev->rx_status.channel = channel;
 190 }
 191
 192 void rt2x00lib_config_promisc(struct rt2x00_dev *rt2x00dev, const int promisc)
 193 {
 194         /*
 195          * Monitor mode implies promisc mode enabled.
 196          * In all other instances, check if we need to toggle promisc mode.
 197          */
 198         if (is_monitor_present(&rt2x00dev->interface) &&
 199             !test_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags)) {
 200                 rt2x00dev->ops->lib->config_promisc(rt2x00dev, 1);
 201                 __set_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags);
 202         }
 203
 204         if (test_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags) != promisc) {
 205                 rt2x00dev->ops->lib->config_promisc(rt2x00dev, promisc);
 206                 __change_bit(INTERFACE_ENABLED_PROMISC, &rt2x00dev->flags);
 207         }
 208 }
 209
 210 void rt2x00lib_config_txpower(struct rt2x00_dev *rt2x00dev, const int txpower)
 211 {
 212         if (txpower == rt2x00dev->tx_power)
 213                 return;
 214
 215         rt2x00dev->ops->lib->config_txpower(rt2x00dev, txpower);
 216
 217         rt2x00dev->tx_power = txpower;
 218 }
 219
 220 void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
 221         const int antenna_tx, const int antenna_rx)
 222 {
 223         if (rt2x00dev->rx_status.antenna == antenna_rx)
 224                 return;
 225
 226         rt2x00dev->ops->lib->config_antenna(rt2x00dev, antenna_tx, antenna_rx);
 227
 228         rt2x00dev->rx_status.antenna = antenna_rx;
 229 }
 230
 231 /*
 232  * Driver initialization handlers.
 233  */
 234 static void rt2x00lib_channel(struct ieee80211_channel *entry,
 235         const int channel, const int tx_power, const int value)
 236 {
 237         entry->chan = channel;
 238         if (channel <= 14)
 239                 entry->freq = 2407 + (5 * channel);
 240         else
 241                 entry->freq = 5000 + (5 * channel);
 242         entry->val = value;
 243         entry->flag =
 244                 IEEE80211_CHAN_W_IBSS |
 245                 IEEE80211_CHAN_W_ACTIVE_SCAN |
 246                 IEEE80211_CHAN_W_SCAN;
 247         entry->power_level = tx_power;
 248         entry->antenna_max = 0xff;
 249 }
 250
 251 static void rt2x00lib_rate(struct ieee80211_rate *entry,
 252         const int rate,const int mask, const int plcp, const int flags)
 253 {
 254         entry->rate = rate;
 255         entry->val =
 256                 DEVICE_SET_RATE_FIELD(rate, RATE) |
 257                 DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
 258                 DEVICE_SET_RATE_FIELD(plcp, PLCP);
 259         entry->flags = flags;
 260         entry->val2 = entry->val;
 261         if (entry->flags & IEEE80211_RATE_PREAMBLE2)
 262                 entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
 263         entry->min_rssi_ack = 0;
 264         entry->min_rssi_ack_delta = 0;
 265 }
 266
 267 static int rt2x00lib_init_hw_modes(struct rt2x00_dev *rt2x00dev,
 268         struct hw_mode_spec *spec)
 269 {
 270         struct ieee80211_hw *hw = rt2x00dev->hw;
 271         struct ieee80211_hw_mode *hwmodes;
 272         struct ieee80211_channel *channels;
 273         struct ieee80211_rate *rates;
 274         unsigned int i;
 275         unsigned char tx_power;
 276
 277         hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
 278         if (!hwmodes)
 279                 goto exit;
 280
 281         channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
 282         if (!channels)
 283                 goto exit_free_modes;
 284
 285         rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
 286         if (!rates)
 287                 goto exit_free_channels;
 288
 289         /*
 290          * Initialize Rate list.
 291          */
 292         rt2x00lib_rate(&rates[0], 10, 0x001, 0x00, IEEE80211_RATE_CCK);
 293         rt2x00lib_rate(&rates[1], 20, 0x003, 0x01, IEEE80211_RATE_CCK_2);
 294         rt2x00lib_rate(&rates[2], 55, 0x007, 0x02, IEEE80211_RATE_CCK_2);
 295         rt2x00lib_rate(&rates[3], 110, 0x00f, 0x03, IEEE80211_RATE_CCK_2);
 296
 297         if (spec->num_rates > 4) {
 298                 rt2x00lib_rate(&rates[4], 60, 0x01f, 0x0b, IEEE80211_RATE_OFDM);
 299                 rt2x00lib_rate(&rates[5], 90, 0x03f, 0x0f, IEEE80211_RATE_OFDM);
 300                 rt2x00lib_rate(&rates[6], 120, 0x07f, 0x0a, IEEE80211_RATE_OFDM);
 301                 rt2x00lib_rate(&rates[7], 180, 0x0ff, 0x0e, IEEE80211_RATE_OFDM);
 302                 rt2x00lib_rate(&rates[8], 240, 0x1ff, 0x09, IEEE80211_RATE_OFDM);
 303                 rt2x00lib_rate(&rates[9], 360, 0x3ff, 0x0d, IEEE80211_RATE_OFDM);
 304                 rt2x00lib_rate(&rates[10], 480, 0x7ff, 0x08, IEEE80211_RATE_OFDM);
 305                 rt2x00lib_rate(&rates[11], 540, 0xfff, 0x0c, IEEE80211_RATE_OFDM);
 306         }
 307
 308         /*
 309          * Initialize Channel list.
 310          */
 311         for (i = 0; i < 14; i++)
 312                 rt2x00lib_channel(&channels[i], i + 1,
 313                         spec->tx_power_bg[i], spec->chan_val_bg[i]);
 314
 315         if (spec->num_channels > 14) {
 316                 for (i = 14; i < spec->num_channels; i++) {
 317                         if (i < 22)
 318                                 channels[i].chan = 36;
 319                         else if (i < 33)
 320                                 channels[i].chan = 100;
 321                         else
 322                                 channels[i].chan = 149;
 323                         channels[i].chan += ((i - 14) * 4);
 324
 325                         if (spec->tx_power_a)
 326                                 tx_power = spec->tx_power_a[i];
 327                         else
 328                                 tx_power = spec->tx_power_default;
 329
 330                         rt2x00lib_channel(&channels[i],
 331                                 channels[i].chan, tx_power,
 332                                 spec->chan_val_a[i]);
 333                 }
 334         }
 335
 336         /*
 337          * Intitialize 802.11b
 338          * Rates: CCK.
 339          * Channels: OFDM.
 340          */
 341         if (spec->num_modes > HWMODE_B) {
 342                 hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
 343                 hwmodes[HWMODE_B].num_channels = 14;
 344                 hwmodes[HWMODE_B].num_rates = 4;
 345                 hwmodes[HWMODE_B].channels = channels;
 346                 hwmodes[HWMODE_B].rates = rates;
 347         }
 348
 349         /*
 350          * Intitialize 802.11g
 351          * Rates: CCK, OFDM.
 352          * Channels: OFDM.
 353          */
 354         if (spec->num_modes > HWMODE_G) {
 355                 hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
 356                 hwmodes[HWMODE_G].num_channels = 14;
 357                 hwmodes[HWMODE_G].num_rates = spec->num_rates;
 358                 hwmodes[HWMODE_G].channels = channels;
 359                 hwmodes[HWMODE_G].rates = rates;
 360         }
 361
 362         /*
 363          * Intitialize 802.11a
 364          * Rates: OFDM.
 365          * Channels: OFDM, UNII, HiperLAN2.
 366          */
 367         if (spec->num_modes > HWMODE_A) {
 368                 hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
 369                 hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
 370                 hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
 371                 hwmodes[HWMODE_A].channels = &channels[14];
 372                 hwmodes[HWMODE_A].rates = &rates[4];
 373         }
 374
 375         if (spec->num_modes > HWMODE_G &&
 376             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
 377                 goto exit_free_rates;
 378
 379         if (spec->num_modes > HWMODE_B &&
 380             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
 381                 goto exit_free_rates;
 382
 383         if (spec->num_modes > HWMODE_A &&
 384             ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
 385                 goto exit_free_rates;
 386
 387         rt2x00dev->hwmodes = hwmodes;
 388
 389         return 0;
 390
 391 exit_free_rates:
 392         kfree(rates);
 393
 394 exit_free_channels:
 395         kfree(channels);
 396
 397 exit_free_modes:
 398         kfree(hwmodes);
 399
 400 exit:
 401         ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
 402         return -ENOMEM;
 403 }
 404
 405 static void rt2x00lib_deinit_hw(struct rt2x00_dev *rt2x00dev)
 406 {
 407         if (test_bit(DEVICE_INITIALIZED_HW, &rt2x00dev->flags))
 408                 ieee80211_unregister_hw(rt2x00dev->hw);
 409
 410         if (likely(rt2x00dev->hwmodes)) {
 411                 kfree(rt2x00dev->hwmodes->channels);
 412                 kfree(rt2x00dev->hwmodes->rates);
 413                 kfree(rt2x00dev->hwmodes);
 414                 rt2x00dev->hwmodes = NULL;
 415         }
 416 }
 417
 418 static int rt2x00lib_init_hw(struct rt2x00_dev *rt2x00dev)
 419 {
 420         struct hw_mode_spec *spec = &rt2x00dev->spec;
 421         int status;
 422
 423         /*
 424          * Initialize HW modes.
 425          */
 426         status = rt2x00lib_init_hw_modes(rt2x00dev, spec);
 427         if (status)
 428                 return status;
 429
 430         /*
 431          * Register HW.
 432          */
 433         status = ieee80211_register_hw(rt2x00dev->hw);
 434         if (status) {
 435                 rt2x00lib_deinit_hw(rt2x00dev);
 436                 return status;
 437         }
 438
 439         __set_bit(DEVICE_INITIALIZED_HW, &rt2x00dev->flags);
 440
 441         return 0;
 442 }
 443
 444 /*
 445  * Initialization/uninitialization handlers.
 446  */
 447 static int rt2x00lib_alloc_ring_entries(struct data_ring *ring,
 448         const u16 max_entries, const u16 data_size, const u16 desc_size)
 449 {
 450         struct data_entry *entry;
 451         unsigned int i;
 452
 453         ring->stats.limit = max_entries;
 454         ring->data_size = data_size;
 455         ring->desc_size = desc_size;
 456
 457         /*
 458          * Allocate all ring entries.
 459          */
 460         entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
 461         if (!entry)
 462                 return -ENOMEM;
 463
 464         for (i = 0; i < ring->stats.limit; i++) {
 465                 entry[i].flags = 0;
 466                 entry[i].ring = ring;
 467                 entry[i].skb = NULL;
 468         }
 469
 470         ring->entry = entry;
 471
 472         return 0;
 473 }
 474
 475 static int rt2x00lib_allocate_ring_entries(struct rt2x00_dev *rt2x00dev)
 476 {
 477         struct data_ring *ring;
 478
 479         /*
 480          * Allocate the RX ring.
 481          */
 482         if (rt2x00lib_alloc_ring_entries(rt2x00dev->rx,
 483                 RX_ENTRIES, DATA_FRAME_SIZE, rt2x00dev->ops->rxd_size))
 484                 return -ENOMEM;
 485
 486         /*
 487          * First allocate the TX rings.
 488          */
 489         txring_for_each(rt2x00dev, ring) {
 490                 if (rt2x00lib_alloc_ring_entries(ring,
 491                         TX_ENTRIES, DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
 492                         return -ENOMEM;
 493         }
 494
 495         /*
 496          * Allocate the BEACON ring.
 497          */
 498         if (rt2x00lib_alloc_ring_entries(&rt2x00dev->bcn[0],
 499                 BEACON_ENTRIES, MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
 500                 return -ENOMEM;
 501
 502         /*
 503          * Allocate the Atim ring.
 504          */
 505         if (test_bit(DEVICE_SUPPORT_ATIM, &rt2x00dev->flags)) {
 506                 if (rt2x00lib_alloc_ring_entries(&rt2x00dev->bcn[1],
 507                         ATIM_ENTRIES, DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
 508                         return -ENOMEM;
 509         }
 510
 511         return 0;
 512 }
 513
 514 static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
 515 {
 516         struct data_ring *ring;
 517
 518         ring_for_each(rt2x00dev, ring) {
 519                 kfree(ring->entry);
 520                 ring->entry = NULL;
 521         }
 522 }
 523
 524 int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
 525 {
 526         int status;
 527
 528         if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 529                 return 0;
 530
 531         /*
 532          * Allocate all data rings.
 533          */
 534         status = rt2x00lib_allocate_ring_entries(rt2x00dev);
 535         if (status) {
 536                 ERROR(rt2x00dev, "DMA allocation failed.\n");
 537                 return status;
 538         }
 539
 540         /*
 541          * Initialize the device.
 542          */
 543         status = rt2x00dev->ops->lib->initialize(rt2x00dev);
 544         if (status)
 545                 goto exit;
 546
 547         __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
 548
 549         /*
 550          * Register the rfkill handler.
 551          */
 552         status = rt2x00lib_register_rfkill(rt2x00dev);
 553         if (status)
 554                 goto exit_unitialize;
 555
 556         return 0;
 557
 558 exit_unitialize:
 559         rt2x00lib_uninitialize(rt2x00dev);
 560
 561 exit:
 562         rt2x00lib_free_ring_entries(rt2x00dev);
 563
 564         return status;
 565 }
 566
 567 void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
 568 {
 569         if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
 570                 return;
 571
 572         /*
 573          * Unregister rfkill.
 574          */
 575         rt2x00lib_unregister_rfkill(rt2x00dev);
 576
 577         /*
 578          * Allow the HW to uninitialize.
 579          */
 580         rt2x00dev->ops->lib->uninitialize(rt2x00dev);
 581
 582         /*
 583          * Free allocated datarings.
 584          */
 585         rt2x00lib_free_ring_entries(rt2x00dev);
 586 }
 587
 588 /*
 589  * driver allocation handlers.
 590  */
 591 static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
 592 {
 593         struct data_ring *ring;
 594         unsigned int ring_num;
 595
 596         /*
 597          * We need the following rings:
 598          * RX: 1
 599          * TX: hw->queues
 600          * Beacon: 1
 601          * Atim: 1 (if supported)
 602          */
 603         ring_num = 2 + rt2x00dev->hw->queues +
 604                 test_bit(DEVICE_SUPPORT_ATIM, &rt2x00dev->flags);
 605
 606         ring = kzalloc(sizeof(*ring) * ring_num, GFP_KERNEL);
 607         if (!ring) {
 608                 ERROR(rt2x00dev, "Ring allocation failed.\n");
 609                 return -ENOMEM;
 610         }
 611
 612         /*
 613          * Initialize pointers
 614          */
 615         rt2x00dev->rx = &ring[0];
 616         rt2x00dev->tx = &ring[1];
 617         rt2x00dev->bcn = &ring[1 + rt2x00dev->hw->queues];
 618
 619         /*
 620          * Initialize ring parameters.
 621          * cw_min: 2^5 = 32.
 622          * cw_max: 2^10 = 1024.
 623          */
 624         ring_for_each(rt2x00dev, ring) {
 625                 ring->rt2x00dev = rt2x00dev;
 626                 ring->tx_params.aifs = 2;
 627                 ring->tx_params.cw_min = 5;
 628                 ring->tx_params.cw_max = 10;
 629         }
 630
 631         return 0;
 632 }
 633
 634 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
 635 {
 636         int retval = -ENOMEM;
 637
 638         /*
 639          * Let the driver probe the device to detect the capabilities.
 640          */
 641         retval = rt2x00dev->ops->lib->init_hw(rt2x00dev);
 642         if (retval) {
 643                 ERROR(rt2x00dev, "Failed to allocate device.\n");
 644                 goto exit;
 645         }
 646
 647         /*
 648          * Initialize configuration work.
 649          */
 650         INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
 651
 652         /*
 653          * Reset current working type.
 654          */
 655         rt2x00dev->interface.type = -EINVAL;
 656
 657         /*
 658          * Allocate ring array.
 659          */
 660         retval = rt2x00lib_alloc_rings(rt2x00dev);
 661         if (retval)
 662                 goto exit;
 663
 664         /*
 665          * Initialize ieee80211 structure.
 666          */
 667         retval = rt2x00lib_init_hw(rt2x00dev);
 668         if (retval) {
 669                 ERROR(rt2x00dev, "Failed to initialize hw.\n");
 670                 goto exit;
 671         }
 672
 673         /*
 674          * Allocatie rfkill.
 675          */
 676         retval = rt2x00lib_allocate_rfkill(rt2x00dev);
 677         if (retval)
 678                 goto exit;
 679
 680         /*
 681          * Open the debugfs entry.
 682          */
 683         rt2x00debug_register(rt2x00dev);
 684
 685         /*
 686          * Check if we need to load the firmware.
 687          */
 688         if (test_bit(FIRMWARE_REQUIRED, &rt2x00dev->flags)) {
 689                 /*
 690                  * Request firmware and wait with further
 691                  * initializing of the card until the firmware
 692                  * has been loaded.
 693                  */
 694                 retval = rt2x00lib_load_firmware(rt2x00dev);
 695                 if (retval)
 696                         goto exit;
 697         }
 698
 699         return 0;
 700
 701 exit:
 702         rt2x00lib_remove_dev(rt2x00dev);
 703
 704         return retval;
 705 }
 706 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
 707
 708 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
 709 {
 710         /*
 711          * Disable radio.
 712          */
 713         rt2x00lib_disable_radio(rt2x00dev);
 714
 715         /*
 716          * Uninitialize device.
 717          */
 718         rt2x00lib_uninitialize(rt2x00dev);
 719
 720         /*
 721          * Close debugfs entry.
 722          */
 723         rt2x00debug_deregister(rt2x00dev);
 724
 725         /*
 726          * Free rfkill
 727          */
 728         rt2x00lib_free_rfkill(rt2x00dev);
 729
 730         /*
 731          * Free ieee80211_hw memory.
 732          */
 733         rt2x00lib_deinit_hw(rt2x00dev);
 734
 735         /*
 736          * Free ring structures.
 737          */
 738         kfree(rt2x00dev->rx);
 739         rt2x00dev->rx = NULL;
 740         rt2x00dev->tx = NULL;
 741         rt2x00dev->bcn = NULL;
 742
 743         /*
 744          * Free EEPROM memory.
 745          */
 746         kfree(rt2x00dev->eeprom);
 747         rt2x00dev->eeprom = NULL;
 748 }
 749 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
 750
 751 /*
 752  * Device state handlers
 753  */
 754 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev,
 755         pm_message_t state)
 756 {
 757         int retval;
 758
 759         NOTICE(rt2x00dev, "Going to sleep.\n");
 760
 761         rt2x00lib_disable_radio(rt2x00dev);
 762
 763         /*
 764          * Set device mode to sleep for power management.
 765          */
 766         retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
 767         if (retval)
 768                 return retval;
 769
 770         rt2x00lib_remove_dev(rt2x00dev);
 771
 772         return 0;
 773 }
 774 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
 775
 776 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
 777 {
 778         int retval;
 779
 780         NOTICE(rt2x00dev, "Waking up.\n");
 781
 782         retval = rt2x00lib_probe_dev(rt2x00dev);
 783         if (retval) {
 784                 ERROR(rt2x00dev, "Failed to allocate device.\n");
 785                 return retval;
 786         }
 787
 788         return 0;
 789 }
 790 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
 791
 792 /*
 793  * Interrupt context handlers.
 794  */
 795 void rt2x00lib_txdone(struct data_entry *entry,
 796         const int status, const int retry)
 797 {
 798         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 799         struct ieee80211_tx_status *tx_status = &entry->tx_status;
 800         struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
 801
 802         /*
 803          * Update TX statistics.
 804          */
 805         tx_status->flags = 0;
 806         tx_status->ack_signal = 0;
 807         tx_status->excessive_retries = (status == TX_FAIL_RETRY);
 808         tx_status->retry_count = retry;
 809
 810         if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
 811                 if (status == TX_SUCCESS || status == TX_SUCCESS_RETRY)
 812                         tx_status->flags |= IEEE80211_TX_STATUS_ACK;
 813                 else
 814                         stats->dot11ACKFailureCount++;
 815         }
 816
 817         tx_status->queue_length = entry->ring->stats.limit;
 818         tx_status->queue_number = tx_status->control.queue;
 819
 820         if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 821                 if (status == TX_SUCCESS || status == TX_SUCCESS_RETRY)
 822                         stats->dot11RTSSuccessCount++;
 823                 else
 824                         stats->dot11RTSFailureCount++;
 825         }
 826
 827         /*
 828          * Send the tx_status to mac80211,
 829          * that method also cleans up the skb structure.
 830          */
 831         ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
 832
 833         entry->skb = NULL;
 834 }
 835 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
 836
 837 void rt2x00lib_rxdone(struct data_entry *entry, char *data,
 838         const int size, const int signal, const int rssi, const int ofdm)
 839 {
 840         struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
 841         struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
 842         struct ieee80211_hw_mode *mode;
 843         struct ieee80211_rate *rate;
 844         struct sk_buff *skb;
 845         unsigned int i;
 846         int val = 0;
 847
 848         /*
 849          * Update RX statistics.
 850          */
 851         mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
 852         for (i = 0; i < mode->num_rates; i++) {
 853                 rate = &mode->rates[i];
 854
 855                 /*
 856                  * When frame was received with an OFDM bitrate,
 857                  * the signal is the PLCP value. If it was received with
 858                  * a CCK bitrate the signal is the rate in 0.5kbit/s.
 859                  */
 860                 if (!ofdm)
 861                         val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
 862                 else
 863                         val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
 864
 865                 if (val == signal) {
 866                         /*
 867                          * Check for preamble bit.
 868                          */
 869                         if (signal & 0x08)
 870                                 val = rate->val2;
 871                         else
 872                                 val = rate->val;
 873                         break;
 874                 }
 875         }
 876
 877         rx_status->rate = val;
 878         rx_status->ssi = rssi;
 879         rt2x00_update_link_rssi(&rt2x00dev->link, rssi);
 880
 881         /*
 882          * Let's allocate a sk_buff where we can store the received data in,
 883          * note that if data is NULL, we still have to allocate a sk_buff
 884          * but that we should use that to replace the sk_buff which is already
 885          * inside the entry.
 886          */
 887         skb = dev_alloc_skb(size + NET_IP_ALIGN);
 888         if (!skb)
 889                 return;
 890
 891         skb_reserve(skb, NET_IP_ALIGN);
 892         skb_put(skb, size);
 893
 894         if (data) {
 895                 memcpy(skb->data, data, size);
 896                 entry->skb = skb;
 897                 skb = NULL;
 898         }
 899
 900         ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
 901         entry->skb = skb;
 902 }
 903 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
 904
 905 /*
 906  * TX descriptor initializer
 907  */
 908 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
 909         struct data_entry *entry, struct data_desc *txd,
 910         struct ieee80211_hdr *ieee80211hdr, unsigned int length,
 911         struct ieee80211_tx_control *control)
 912 {
 913         struct data_entry_desc desc;
 914         int tx_rate;
 915         int bitrate;
 916         int duration;
 917         int residual;
 918         u16 frame_control;
 919         u16 seq_ctrl;
 920
 921         /*
 922          * Identify queue
 923          */
 924         if (control->queue < rt2x00dev->hw->queues)
 925                 desc.queue = control->queue;
 926         else
 927                 desc.queue = 15;
 928
 929         /*
 930          * Read required fields from ieee80211 header.
 931          */
 932         frame_control = le16_to_cpu(ieee80211hdr->frame_control);
 933         seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
 934
 935         tx_rate = control->tx_rate;
 936
 937         /*
 938          * Check if this is a rts frame
 939          */
 940         if (is_rts_frame(frame_control)) {
 941                 __set_bit(ENTRY_TXD_RTS_FRAME, &entry->flags);
 942                 if (control->rts_cts_rate)
 943                         tx_rate = control->rts_cts_rate;
 944         }
 945
 946         /*
 947          * Check for OFDM
 948          */
 949         if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATE)
 950                 __set_bit(ENTRY_TXD_OFDM_RATE, &entry->flags);
 951
 952         /*
 953          * Check if more fragments are pending
 954          */
 955         if (ieee80211_get_morefrag(ieee80211hdr))
 956                 __set_bit(ENTRY_TXD_MORE_FRAG, &entry->flags);
 957
 958         /*
 959          * Beacons and probe responses require the tsf timestamp
 960          * to be inserted into the frame.
 961          */
 962         if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
 963             is_probe_resp(frame_control))
 964                 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &entry->flags);
 965
 966         /*
 967          * Check if ACK is required
 968          */
 969         if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
 970                 __set_bit(ENTRY_TXD_REQ_ACK, &entry->flags);
 971
 972         /*
 973          * Determine with what IFS priority this frame should be send.
 974          * Set ifs to IFS_SIFS when the this is not the first fragment,
 975          * or this fragment came after RTS/CTS.
 976          */
 977         if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
 978             test_bit(ENTRY_TXD_RTS_FRAME, &entry->flags))
 979                 desc.ifs = IFS_SIFS;
 980         else
 981                 desc.ifs = IFS_BACKOFF;
 982
 983         /*
 984          * How the length should be processed depends
 985          * on if we are working with OFDM rates or not.
 986          */
 987         if (test_bit(ENTRY_TXD_OFDM_RATE, &entry->flags)) {
 988                 residual = 0;
 989                 desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f;
 990                 desc.length_low = ((length + FCS_LEN) & 0x3f);
 991
 992         } else {
 993                 bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
 994
 995                 /*
 996                  * Convert length to microseconds.
 997                  */
 998                 residual = get_duration_res(length + FCS_LEN, bitrate);
 999                 duration = get_duration(length + FCS_LEN, bitrate);
1000
1001                 if (residual != 0)
1002                         duration++;
1003
1004                 desc.length_high = duration >> 8;
1005                 desc.length_low = duration & 0xff;
1006         }
1007
1008         /*
1009          * Create the signal and service values.
1010          */
1011         desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
1012         if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
1013                 desc.signal |= 0x08;
1014
1015         desc.service = 0x04;
1016         if (residual <= (8 % 11))
1017                 desc.service |= 0x80;
1018
1019         rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, entry, txd, &desc,
1020                 ieee80211hdr, length, control);
1021 }
1022 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
1023
1024 /*
1025  * rt2x00lib module information.
1026  */
1027 MODULE_AUTHOR(DRV_PROJECT);
1028 MODULE_VERSION(DRV_VERSION);
1029 MODULE_DESCRIPTION("rt2x00 library");
1030 MODULE_LICENSE("GPL");