1/* 2 * mac80211 glue code for mac80211 Prism54 drivers 3 * 4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> 5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> 6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> 7 * 8 * Based on: 9 * - the islsm (softmac prism54) driver, which is: 10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. 11 * - stlc45xx driver 12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License version 2 as 16 * published by the Free Software Foundation. 17 */ 18 19#include <linux/init.h> 20#include <linux/slab.h> 21#include <linux/firmware.h> 22#include <linux/etherdevice.h> 23#include <linux/module.h> 24 25#include <net/mac80211.h> 26 27#include "p54.h" 28#include "lmac.h" 29 30static bool modparam_nohwcrypt; 31module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); 32MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); 33MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>"); 34MODULE_DESCRIPTION("Softmac Prism54 common code"); 35MODULE_LICENSE("GPL"); 36MODULE_ALIAS("prism54common"); 37 38static int p54_sta_add_remove(struct ieee80211_hw *hw, 39 struct ieee80211_vif *vif, 40 struct ieee80211_sta *sta) 41{ 42 struct p54_common *priv = hw->priv; 43 44 /* 45 * Notify the firmware that we don't want or we don't 46 * need to buffer frames for this station anymore. 47 */ 48 49 p54_sta_unlock(priv, sta->addr); 50 51 return 0; 52} 53 54static void p54_sta_notify(struct ieee80211_hw *dev, struct ieee80211_vif *vif, 55 enum sta_notify_cmd notify_cmd, 56 struct ieee80211_sta *sta) 57{ 58 struct p54_common *priv = dev->priv; 59 60 switch (notify_cmd) { 61 case STA_NOTIFY_AWAKE: 62 /* update the firmware's filter table */ 63 p54_sta_unlock(priv, sta->addr); 64 break; 65 default: 66 break; 67 } 68} 69 70static int p54_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta, 71 bool set) 72{ 73 struct p54_common *priv = dev->priv; 74 75 return p54_update_beacon_tim(priv, sta->aid, set); 76} 77 78u8 *p54_find_ie(struct sk_buff *skb, u8 ie) 79{ 80 struct ieee80211_mgmt *mgmt = (void *)skb->data; 81 u8 *pos, *end; 82 83 if (skb->len <= sizeof(mgmt)) 84 return NULL; 85 86 pos = (u8 *)mgmt->u.beacon.variable; 87 end = skb->data + skb->len; 88 while (pos < end) { 89 if (pos + 2 + pos[1] > end) 90 return NULL; 91 92 if (pos[0] == ie) 93 return pos; 94 95 pos += 2 + pos[1]; 96 } 97 return NULL; 98} 99 100static int p54_beacon_format_ie_tim(struct sk_buff *skb) 101{ 102 /* 103 * the good excuse for this mess is ... the firmware. 104 * The dummy TIM MUST be at the end of the beacon frame, 105 * because it'll be overwritten! 106 */ 107 u8 *tim; 108 u8 dtim_len; 109 u8 dtim_period; 110 u8 *next; 111 112 tim = p54_find_ie(skb, WLAN_EID_TIM); 113 if (!tim) 114 return 0; 115 116 dtim_len = tim[1]; 117 dtim_period = tim[3]; 118 next = tim + 2 + dtim_len; 119 120 if (dtim_len < 3) 121 return -EINVAL; 122 123 memmove(tim, next, skb_tail_pointer(skb) - next); 124 tim = skb_tail_pointer(skb) - (dtim_len + 2); 125 126 /* add the dummy at the end */ 127 tim[0] = WLAN_EID_TIM; 128 tim[1] = 3; 129 tim[2] = 0; 130 tim[3] = dtim_period; 131 tim[4] = 0; 132 133 if (dtim_len > 3) 134 skb_trim(skb, skb->len - (dtim_len - 3)); 135 136 return 0; 137} 138 139static int p54_beacon_update(struct p54_common *priv, 140 struct ieee80211_vif *vif) 141{ 142 struct sk_buff *beacon; 143 int ret; 144 145 beacon = ieee80211_beacon_get(priv->hw, vif); 146 if (!beacon) 147 return -ENOMEM; 148 ret = p54_beacon_format_ie_tim(beacon); 149 if (ret) 150 return ret; 151 152 /* 153 * During operation, the firmware takes care of beaconing. 154 * The driver only needs to upload a new beacon template, once 155 * the template was changed by the stack or userspace. 156 * 157 * LMAC API 3.2.2 also specifies that the driver does not need 158 * to cancel the old beacon template by hand, instead the firmware 159 * will release the previous one through the feedback mechanism. 160 */ 161 p54_tx_80211(priv->hw, beacon); 162 priv->tsf_high32 = 0; 163 priv->tsf_low32 = 0; 164 165 return 0; 166} 167 168static int p54_start(struct ieee80211_hw *dev) 169{ 170 struct p54_common *priv = dev->priv; 171 int err; 172 173 mutex_lock(&priv->conf_mutex); 174 err = priv->open(dev); 175 if (err) 176 goto out; 177 P54_SET_QUEUE(priv->qos_params[0], 0x0002, 0x0003, 0x0007, 47); 178 P54_SET_QUEUE(priv->qos_params[1], 0x0002, 0x0007, 0x000f, 94); 179 P54_SET_QUEUE(priv->qos_params[2], 0x0003, 0x000f, 0x03ff, 0); 180 P54_SET_QUEUE(priv->qos_params[3], 0x0007, 0x000f, 0x03ff, 0); 181 err = p54_set_edcf(priv); 182 if (err) 183 goto out; 184 185 memset(priv->bssid, ~0, ETH_ALEN); 186 priv->mode = NL80211_IFTYPE_MONITOR; 187 err = p54_setup_mac(priv); 188 if (err) { 189 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 190 goto out; 191 } 192 193 ieee80211_queue_delayed_work(dev, &priv->work, 0); 194 195 priv->softled_state = 0; 196 err = p54_set_leds(priv); 197 198out: 199 mutex_unlock(&priv->conf_mutex); 200 return err; 201} 202 203static void p54_stop(struct ieee80211_hw *dev) 204{ 205 struct p54_common *priv = dev->priv; 206 int i; 207 208 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 209 priv->softled_state = 0; 210 cancel_delayed_work_sync(&priv->work); 211 mutex_lock(&priv->conf_mutex); 212 p54_set_leds(priv); 213 priv->stop(dev); 214 skb_queue_purge(&priv->tx_pending); 215 skb_queue_purge(&priv->tx_queue); 216 for (i = 0; i < P54_QUEUE_NUM; i++) { 217 priv->tx_stats[i].count = 0; 218 priv->tx_stats[i].len = 0; 219 } 220 221 priv->beacon_req_id = cpu_to_le32(0); 222 priv->tsf_high32 = priv->tsf_low32 = 0; 223 mutex_unlock(&priv->conf_mutex); 224} 225 226static int p54_add_interface(struct ieee80211_hw *dev, 227 struct ieee80211_vif *vif) 228{ 229 struct p54_common *priv = dev->priv; 230 231 mutex_lock(&priv->conf_mutex); 232 if (priv->mode != NL80211_IFTYPE_MONITOR) { 233 mutex_unlock(&priv->conf_mutex); 234 return -EOPNOTSUPP; 235 } 236 237 priv->vif = vif; 238 239 switch (vif->type) { 240 case NL80211_IFTYPE_STATION: 241 case NL80211_IFTYPE_ADHOC: 242 case NL80211_IFTYPE_AP: 243 case NL80211_IFTYPE_MESH_POINT: 244 priv->mode = vif->type; 245 break; 246 default: 247 mutex_unlock(&priv->conf_mutex); 248 return -EOPNOTSUPP; 249 } 250 251 memcpy(priv->mac_addr, vif->addr, ETH_ALEN); 252 p54_setup_mac(priv); 253 mutex_unlock(&priv->conf_mutex); 254 return 0; 255} 256 257static void p54_remove_interface(struct ieee80211_hw *dev, 258 struct ieee80211_vif *vif) 259{ 260 struct p54_common *priv = dev->priv; 261 262 mutex_lock(&priv->conf_mutex); 263 priv->vif = NULL; 264 265 /* 266 * LMAC API 3.2.2 states that any active beacon template must be 267 * canceled by the driver before attempting a mode transition. 268 */ 269 if (le32_to_cpu(priv->beacon_req_id) != 0) { 270 p54_tx_cancel(priv, priv->beacon_req_id); 271 wait_for_completion_interruptible_timeout(&priv->beacon_comp, HZ); 272 } 273 priv->mode = NL80211_IFTYPE_MONITOR; 274 memset(priv->mac_addr, 0, ETH_ALEN); 275 memset(priv->bssid, 0, ETH_ALEN); 276 p54_setup_mac(priv); 277 mutex_unlock(&priv->conf_mutex); 278} 279 280static int p54_wait_for_stats(struct ieee80211_hw *dev) 281{ 282 struct p54_common *priv = dev->priv; 283 int ret; 284 285 priv->update_stats = true; 286 ret = p54_fetch_statistics(priv); 287 if (ret) 288 return ret; 289 290 ret = wait_for_completion_interruptible_timeout(&priv->stat_comp, HZ); 291 if (ret == 0) 292 return -ETIMEDOUT; 293 294 return 0; 295} 296 297static void p54_reset_stats(struct p54_common *priv) 298{ 299 struct ieee80211_channel *chan = priv->curchan; 300 301 if (chan) { 302 struct survey_info *info = &priv->survey[chan->hw_value]; 303 304 /* only reset channel statistics, don't touch .filled, etc. */ 305 info->channel_time = 0; 306 info->channel_time_busy = 0; 307 info->channel_time_tx = 0; 308 } 309 310 priv->update_stats = true; 311 priv->survey_raw.active = 0; 312 priv->survey_raw.cca = 0; 313 priv->survey_raw.tx = 0; 314} 315 316static int p54_config(struct ieee80211_hw *dev, u32 changed) 317{ 318 int ret = 0; 319 struct p54_common *priv = dev->priv; 320 struct ieee80211_conf *conf = &dev->conf; 321 322 mutex_lock(&priv->conf_mutex); 323 if (changed & IEEE80211_CONF_CHANGE_POWER) 324 priv->output_power = conf->power_level << 2; 325 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { 326 struct ieee80211_channel *oldchan; 327 WARN_ON(p54_wait_for_stats(dev)); 328 oldchan = priv->curchan; 329 priv->curchan = NULL; 330 ret = p54_scan(priv, P54_SCAN_EXIT, 0); 331 if (ret) { 332 priv->curchan = oldchan; 333 goto out; 334 } 335 /* 336 * TODO: Use the LM_SCAN_TRAP to determine the current 337 * operating channel. 338 */ 339 priv->curchan = priv->hw->conf.channel; 340 p54_reset_stats(priv); 341 WARN_ON(p54_fetch_statistics(priv)); 342 } 343 if (changed & IEEE80211_CONF_CHANGE_PS) { 344 WARN_ON(p54_wait_for_stats(dev)); 345 ret = p54_set_ps(priv); 346 if (ret) 347 goto out; 348 WARN_ON(p54_wait_for_stats(dev)); 349 } 350 if (changed & IEEE80211_CONF_CHANGE_IDLE) { 351 WARN_ON(p54_wait_for_stats(dev)); 352 ret = p54_setup_mac(priv); 353 if (ret) 354 goto out; 355 WARN_ON(p54_wait_for_stats(dev)); 356 } 357 358out: 359 mutex_unlock(&priv->conf_mutex); 360 return ret; 361} 362 363static u64 p54_prepare_multicast(struct ieee80211_hw *dev, 364 struct netdev_hw_addr_list *mc_list) 365{ 366 struct p54_common *priv = dev->priv; 367 struct netdev_hw_addr *ha; 368 int i; 369 370 BUILD_BUG_ON(ARRAY_SIZE(priv->mc_maclist) != 371 ARRAY_SIZE(((struct p54_group_address_table *)NULL)->mac_list)); 372 /* 373 * The first entry is reserved for the global broadcast MAC. 374 * Otherwise the firmware will drop it and ARP will no longer work. 375 */ 376 i = 1; 377 priv->mc_maclist_num = netdev_hw_addr_list_count(mc_list) + i; 378 netdev_hw_addr_list_for_each(ha, mc_list) { 379 memcpy(&priv->mc_maclist[i], ha->addr, ETH_ALEN); 380 i++; 381 if (i >= ARRAY_SIZE(priv->mc_maclist)) 382 break; 383 } 384 385 return 1; /* update */ 386} 387 388static void p54_configure_filter(struct ieee80211_hw *dev, 389 unsigned int changed_flags, 390 unsigned int *total_flags, 391 u64 multicast) 392{ 393 struct p54_common *priv = dev->priv; 394 395 *total_flags &= FIF_PROMISC_IN_BSS | 396 FIF_ALLMULTI | 397 FIF_OTHER_BSS; 398 399 priv->filter_flags = *total_flags; 400 401 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) 402 p54_setup_mac(priv); 403 404 if (changed_flags & FIF_ALLMULTI || multicast) 405 p54_set_groupfilter(priv); 406} 407 408static int p54_conf_tx(struct ieee80211_hw *dev, 409 struct ieee80211_vif *vif, u16 queue, 410 const struct ieee80211_tx_queue_params *params) 411{ 412 struct p54_common *priv = dev->priv; 413 int ret; 414 415 mutex_lock(&priv->conf_mutex); 416 if (queue < dev->queues) { 417 P54_SET_QUEUE(priv->qos_params[queue], params->aifs, 418 params->cw_min, params->cw_max, params->txop); 419 ret = p54_set_edcf(priv); 420 } else 421 ret = -EINVAL; 422 mutex_unlock(&priv->conf_mutex); 423 return ret; 424} 425 426static void p54_work(struct work_struct *work) 427{ 428 struct p54_common *priv = container_of(work, struct p54_common, 429 work.work); 430 431 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) 432 return ; 433 434 /* 435 * TODO: walk through tx_queue and do the following tasks 436 * 1. initiate bursts. 437 * 2. cancel stuck frames / reset the device if necessary. 438 */ 439 440 mutex_lock(&priv->conf_mutex); 441 WARN_ON_ONCE(p54_fetch_statistics(priv)); 442 mutex_unlock(&priv->conf_mutex); 443} 444 445static int p54_get_stats(struct ieee80211_hw *dev, 446 struct ieee80211_low_level_stats *stats) 447{ 448 struct p54_common *priv = dev->priv; 449 450 memcpy(stats, &priv->stats, sizeof(*stats)); 451 return 0; 452} 453 454static void p54_bss_info_changed(struct ieee80211_hw *dev, 455 struct ieee80211_vif *vif, 456 struct ieee80211_bss_conf *info, 457 u32 changed) 458{ 459 struct p54_common *priv = dev->priv; 460 461 mutex_lock(&priv->conf_mutex); 462 if (changed & BSS_CHANGED_BSSID) { 463 memcpy(priv->bssid, info->bssid, ETH_ALEN); 464 p54_setup_mac(priv); 465 } 466 467 if (changed & BSS_CHANGED_BEACON) { 468 p54_scan(priv, P54_SCAN_EXIT, 0); 469 p54_setup_mac(priv); 470 p54_beacon_update(priv, vif); 471 p54_set_edcf(priv); 472 } 473 474 if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_BEACON)) { 475 priv->use_short_slot = info->use_short_slot; 476 p54_set_edcf(priv); 477 } 478 if (changed & BSS_CHANGED_BASIC_RATES) { 479 if (dev->conf.channel->band == IEEE80211_BAND_5GHZ) 480 priv->basic_rate_mask = (info->basic_rates << 4); 481 else 482 priv->basic_rate_mask = info->basic_rates; 483 p54_setup_mac(priv); 484 if (priv->fw_var >= 0x500) 485 p54_scan(priv, P54_SCAN_EXIT, 0); 486 } 487 if (changed & BSS_CHANGED_ASSOC) { 488 if (info->assoc) { 489 priv->aid = info->aid; 490 priv->wakeup_timer = info->beacon_int * 491 info->dtim_period * 5; 492 p54_setup_mac(priv); 493 } else { 494 priv->wakeup_timer = 500; 495 priv->aid = 0; 496 } 497 } 498 499 mutex_unlock(&priv->conf_mutex); 500} 501 502static int p54_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd, 503 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 504 struct ieee80211_key_conf *key) 505{ 506 struct p54_common *priv = dev->priv; 507 int slot, ret = 0; 508 u8 algo = 0; 509 u8 *addr = NULL; 510 511 if (modparam_nohwcrypt) 512 return -EOPNOTSUPP; 513 514 mutex_lock(&priv->conf_mutex); 515 if (cmd == SET_KEY) { 516 switch (key->cipher) { 517 case WLAN_CIPHER_SUITE_TKIP: 518 if (!(priv->privacy_caps & (BR_DESC_PRIV_CAP_MICHAEL | 519 BR_DESC_PRIV_CAP_TKIP))) { 520 ret = -EOPNOTSUPP; 521 goto out_unlock; 522 } 523 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 524 algo = P54_CRYPTO_TKIPMICHAEL; 525 break; 526 case WLAN_CIPHER_SUITE_WEP40: 527 case WLAN_CIPHER_SUITE_WEP104: 528 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_WEP)) { 529 ret = -EOPNOTSUPP; 530 goto out_unlock; 531 } 532 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 533 algo = P54_CRYPTO_WEP; 534 break; 535 case WLAN_CIPHER_SUITE_CCMP: 536 if (!(priv->privacy_caps & BR_DESC_PRIV_CAP_AESCCMP)) { 537 ret = -EOPNOTSUPP; 538 goto out_unlock; 539 } 540 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; 541 algo = P54_CRYPTO_AESCCMP; 542 break; 543 default: 544 ret = -EOPNOTSUPP; 545 goto out_unlock; 546 } 547 slot = bitmap_find_free_region(priv->used_rxkeys, 548 priv->rx_keycache_size, 0); 549 550 if (slot < 0) { 551 /* 552 * The device supports the chosen algorithm, but the 553 * firmware does not provide enough key slots to store 554 * all of them. 555 * But encryption offload for outgoing frames is always 556 * possible, so we just pretend that the upload was 557 * successful and do the decryption in software. 558 */ 559 560 /* mark the key as invalid. */ 561 key->hw_key_idx = 0xff; 562 goto out_unlock; 563 } 564 } else { 565 slot = key->hw_key_idx; 566 567 if (slot == 0xff) { 568 /* This key was not uploaded into the rx key cache. */ 569 570 goto out_unlock; 571 } 572 573 bitmap_release_region(priv->used_rxkeys, slot, 0); 574 algo = 0; 575 } 576 577 if (sta) 578 addr = sta->addr; 579 580 ret = p54_upload_key(priv, algo, slot, key->keyidx, 581 key->keylen, addr, key->key); 582 if (ret) { 583 bitmap_release_region(priv->used_rxkeys, slot, 0); 584 ret = -EOPNOTSUPP; 585 goto out_unlock; 586 } 587 588 key->hw_key_idx = slot; 589 590out_unlock: 591 mutex_unlock(&priv->conf_mutex); 592 return ret; 593} 594 595static int p54_get_survey(struct ieee80211_hw *dev, int idx, 596 struct survey_info *survey) 597{ 598 struct p54_common *priv = dev->priv; 599 struct ieee80211_channel *chan; 600 int err, tries; 601 bool in_use = false; 602 603 if (idx >= priv->chan_num) 604 return -ENOENT; 605 606#define MAX_TRIES 1 607 for (tries = 0; tries < MAX_TRIES; tries++) { 608 chan = priv->curchan; 609 if (chan && chan->hw_value == idx) { 610 mutex_lock(&priv->conf_mutex); 611 err = p54_wait_for_stats(dev); 612 mutex_unlock(&priv->conf_mutex); 613 if (err) 614 return err; 615 616 in_use = true; 617 } 618 619 memcpy(survey, &priv->survey[idx], sizeof(*survey)); 620 621 if (in_use) { 622 /* test if the reported statistics are valid. */ 623 if (survey->channel_time != 0) { 624 survey->filled |= SURVEY_INFO_IN_USE; 625 } else { 626 /* 627 * hw/fw has not accumulated enough sample sets. 628 * Wait for 100ms, this ought to be enough to 629 * to get at least one non-null set of channel 630 * usage statistics. 631 */ 632 msleep(100); 633 continue; 634 } 635 } 636 return 0; 637 } 638 return -ETIMEDOUT; 639#undef MAX_TRIES 640} 641 642static unsigned int p54_flush_count(struct p54_common *priv) 643{ 644 unsigned int total = 0, i; 645 646 BUILD_BUG_ON(P54_QUEUE_NUM > ARRAY_SIZE(priv->tx_stats)); 647 648 /* 649 * Because the firmware has the sole control over any frames 650 * in the P54_QUEUE_BEACON or P54_QUEUE_SCAN queues, they 651 * don't really count as pending or active. 652 */ 653 for (i = P54_QUEUE_MGMT; i < P54_QUEUE_NUM; i++) 654 total += priv->tx_stats[i].len; 655 return total; 656} 657 658static void p54_flush(struct ieee80211_hw *dev, bool drop) 659{ 660 struct p54_common *priv = dev->priv; 661 unsigned int total, i; 662 663 /* 664 * Currently, it wouldn't really matter if we wait for one second 665 * or 15 minutes. But once someone gets around and completes the 666 * TODOs [ancel stuck frames / reset device] in p54_work, it will 667 * suddenly make sense to wait that long. 668 */ 669 i = P54_STATISTICS_UPDATE * 2 / 20; 670 671 /* 672 * In this case no locking is required because as we speak the 673 * queues have already been stopped and no new frames can sneak 674 * up from behind. 675 */ 676 while ((total = p54_flush_count(priv) && i--)) { 677 /* waste time */ 678 msleep(20); 679 } 680 681 WARN(total, "tx flush timeout, unresponsive firmware"); 682} 683 684static void p54_set_coverage_class(struct ieee80211_hw *dev, u8 coverage_class) 685{ 686 struct p54_common *priv = dev->priv; 687 688 mutex_lock(&priv->conf_mutex); 689 /* support all coverage class values as in 802.11-2007 Table 7-27 */ 690 priv->coverage_class = clamp_t(u8, coverage_class, 0, 31); 691 p54_set_edcf(priv); 692 mutex_unlock(&priv->conf_mutex); 693} 694 695static const struct ieee80211_ops p54_ops = { 696 .tx = p54_tx_80211, 697 .start = p54_start, 698 .stop = p54_stop, 699 .add_interface = p54_add_interface, 700 .remove_interface = p54_remove_interface, 701 .set_tim = p54_set_tim, 702 .sta_notify = p54_sta_notify, 703 .sta_add = p54_sta_add_remove, 704 .sta_remove = p54_sta_add_remove, 705 .set_key = p54_set_key, 706 .config = p54_config, 707 .flush = p54_flush, 708 .bss_info_changed = p54_bss_info_changed, 709 .prepare_multicast = p54_prepare_multicast, 710 .configure_filter = p54_configure_filter, 711 .conf_tx = p54_conf_tx, 712 .get_stats = p54_get_stats, 713 .get_survey = p54_get_survey, 714 .set_coverage_class = p54_set_coverage_class, 715}; 716 717struct ieee80211_hw *p54_init_common(size_t priv_data_len) 718{ 719 struct ieee80211_hw *dev; 720 struct p54_common *priv; 721 722 dev = ieee80211_alloc_hw(priv_data_len, &p54_ops); 723 if (!dev) 724 return NULL; 725 726 priv = dev->priv; 727 priv->hw = dev; 728 priv->mode = NL80211_IFTYPE_UNSPECIFIED; 729 priv->basic_rate_mask = 0x15f; 730 spin_lock_init(&priv->tx_stats_lock); 731 skb_queue_head_init(&priv->tx_queue); 732 skb_queue_head_init(&priv->tx_pending); 733 dev->flags = IEEE80211_HW_RX_INCLUDES_FCS | 734 IEEE80211_HW_SIGNAL_DBM | 735 IEEE80211_HW_SUPPORTS_PS | 736 IEEE80211_HW_PS_NULLFUNC_STACK | 737 IEEE80211_HW_BEACON_FILTER | 738 IEEE80211_HW_REPORTS_TX_ACK_STATUS; 739 740 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | 741 BIT(NL80211_IFTYPE_ADHOC) | 742 BIT(NL80211_IFTYPE_AP) | 743 BIT(NL80211_IFTYPE_MESH_POINT); 744 745 dev->channel_change_time = 1000; /* TODO: find actual value */ 746 priv->beacon_req_id = cpu_to_le32(0); 747 priv->tx_stats[P54_QUEUE_BEACON].limit = 1; 748 priv->tx_stats[P54_QUEUE_FWSCAN].limit = 1; 749 priv->tx_stats[P54_QUEUE_MGMT].limit = 3; 750 priv->tx_stats[P54_QUEUE_CAB].limit = 3; 751 priv->tx_stats[P54_QUEUE_DATA].limit = 5; 752 dev->queues = 1; 753 priv->noise = -94; 754 /* 755 * We support at most 8 tries no matter which rate they're at, 756 * we cannot support max_rates * max_rate_tries as we set it 757 * here, but setting it correctly to 4/2 or so would limit us 758 * artificially if the RC algorithm wants just two rates, so 759 * let's say 4/7, we'll redistribute it at TX time, see the 760 * comments there. 761 */ 762 dev->max_rates = 4; 763 dev->max_rate_tries = 7; 764 dev->extra_tx_headroom = sizeof(struct p54_hdr) + 4 + 765 sizeof(struct p54_tx_data); 766 767 /* 768 * For now, disable PS by default because it affects 769 * link stability significantly. 770 */ 771 dev->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT; 772 773 mutex_init(&priv->conf_mutex); 774 mutex_init(&priv->eeprom_mutex); 775 init_completion(&priv->stat_comp); 776 init_completion(&priv->eeprom_comp); 777 init_completion(&priv->beacon_comp); 778 INIT_DELAYED_WORK(&priv->work, p54_work); 779 780 memset(&priv->mc_maclist[0], ~0, ETH_ALEN); 781 priv->curchan = NULL; 782 p54_reset_stats(priv); 783 return dev; 784} 785EXPORT_SYMBOL_GPL(p54_init_common); 786 787int p54_register_common(struct ieee80211_hw *dev, struct device *pdev) 788{ 789 struct p54_common __maybe_unused *priv = dev->priv; 790 int err; 791 792 err = ieee80211_register_hw(dev); 793 if (err) { 794 dev_err(pdev, "Cannot register device (%d).\n", err); 795 return err; 796 } 797 798#ifdef CONFIG_P54_LEDS 799 err = p54_init_leds(priv); 800 if (err) 801 return err; 802#endif /* CONFIG_P54_LEDS */ 803 804 dev_info(pdev, "is registered as '%s'\n", wiphy_name(dev->wiphy)); 805 return 0; 806} 807EXPORT_SYMBOL_GPL(p54_register_common); 808 809void p54_free_common(struct ieee80211_hw *dev) 810{ 811 struct p54_common *priv = dev->priv; 812 unsigned int i; 813 814 for (i = 0; i < IEEE80211_NUM_BANDS; i++) 815 kfree(priv->band_table[i]); 816 817 kfree(priv->iq_autocal); 818 kfree(priv->output_limit); 819 kfree(priv->curve_data); 820 kfree(priv->rssi_db); 821 kfree(priv->used_rxkeys); 822 kfree(priv->survey); 823 priv->iq_autocal = NULL; 824 priv->output_limit = NULL; 825 priv->curve_data = NULL; 826 priv->rssi_db = NULL; 827 priv->used_rxkeys = NULL; 828 priv->survey = NULL; 829 ieee80211_free_hw(dev); 830} 831EXPORT_SYMBOL_GPL(p54_free_common); 832 833void p54_unregister_common(struct ieee80211_hw *dev) 834{ 835 struct p54_common *priv = dev->priv; 836 837#ifdef CONFIG_P54_LEDS 838 p54_unregister_leds(priv); 839#endif /* CONFIG_P54_LEDS */ 840 841 ieee80211_unregister_hw(dev); 842 mutex_destroy(&priv->conf_mutex); 843 mutex_destroy(&priv->eeprom_mutex); 844} 845EXPORT_SYMBOL_GPL(p54_unregister_common); 846