drivers/net/wireless/rtlwifi/base.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2009-2010  Realtek Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  * Contact Information:
  22  * wlanfae <wlanfae@realtek.com>
  23  * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24  * Hsinchu 300, Taiwan.
  25  *
  26  * Larry Finger <Larry.Finger@lwfinger.net>
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/ip.h>
  31 #include "wifi.h"
  32 #include "rc.h"
  33 #include "base.h"
  34 #include "efuse.h"
  35 #include "cam.h"
  36 #include "ps.h"
  37 #include "regd.h"
  38
  39 /*
  40  *NOTICE!!!: This file will be very big, we hsould
  41  *keep it clear under follwing roles:
  42  *
  43  *This file include follwing part, so, if you add new
  44  *functions into this file, please check which part it
  45  *should includes. or check if you should add new part
  46  *for this file:
  47  *
  48  *1) mac80211 init functions
  49  *2) tx information functions
  50  *3) functions called by core.c
  51  *4) wq & timer callback functions
  52  *5) frame process functions
  53  *6) sysfs functions
  54  *7) ...
  55  */
  56
  57 /*********************************************************
  58  *
  59  * mac80211 init functions
  60  *
  61  *********************************************************/
  62 static struct ieee80211_channel rtl_channeltable[] = {
  63         {.center_freq = 2412, .hw_value = 1,},
  64         {.center_freq = 2417, .hw_value = 2,},
  65         {.center_freq = 2422, .hw_value = 3,},
  66         {.center_freq = 2427, .hw_value = 4,},
  67         {.center_freq = 2432, .hw_value = 5,},
  68         {.center_freq = 2437, .hw_value = 6,},
  69         {.center_freq = 2442, .hw_value = 7,},
  70         {.center_freq = 2447, .hw_value = 8,},
  71         {.center_freq = 2452, .hw_value = 9,},
  72         {.center_freq = 2457, .hw_value = 10,},
  73         {.center_freq = 2462, .hw_value = 11,},
  74         {.center_freq = 2467, .hw_value = 12,},
  75         {.center_freq = 2472, .hw_value = 13,},
  76         {.center_freq = 2484, .hw_value = 14,},
  77 };
  78
  79 static struct ieee80211_rate rtl_ratetable[] = {
  80         {.bitrate = 10, .hw_value = 0x00,},
  81         {.bitrate = 20, .hw_value = 0x01,},
  82         {.bitrate = 55, .hw_value = 0x02,},
  83         {.bitrate = 110, .hw_value = 0x03,},
  84         {.bitrate = 60, .hw_value = 0x04,},
  85         {.bitrate = 90, .hw_value = 0x05,},
  86         {.bitrate = 120, .hw_value = 0x06,},
  87         {.bitrate = 180, .hw_value = 0x07,},
  88         {.bitrate = 240, .hw_value = 0x08,},
  89         {.bitrate = 360, .hw_value = 0x09,},
  90         {.bitrate = 480, .hw_value = 0x0a,},
  91         {.bitrate = 540, .hw_value = 0x0b,},
  92 };
  93
  94 static const struct ieee80211_supported_band rtl_band_2ghz = {
  95         .band = IEEE80211_BAND_2GHZ,
  96
  97         .channels = rtl_channeltable,
  98         .n_channels = ARRAY_SIZE(rtl_channeltable),
  99
 100         .bitrates = rtl_ratetable,
 101         .n_bitrates = ARRAY_SIZE(rtl_ratetable),
 102
 103         .ht_cap = {0},
 104 };
 105
 106 static void _rtl_init_hw_ht_capab(struct ieee80211_hw *hw,
 107                                   struct ieee80211_sta_ht_cap *ht_cap)
 108 {
 109         struct rtl_priv *rtlpriv = rtl_priv(hw);
 110         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 111
 112         ht_cap->ht_supported = true;
 113         ht_cap->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 114             IEEE80211_HT_CAP_SGI_40 |
 115             IEEE80211_HT_CAP_SGI_20 |
 116             IEEE80211_HT_CAP_DSSSCCK40 | IEEE80211_HT_CAP_MAX_AMSDU;
 117
 118         /*
 119          *Maximum length of AMPDU that the STA can receive.
 120          *Length = 2 ^ (13 + max_ampdu_length_exp) - 1 (octets)
 121          */
 122         ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
 123
 124         /*Minimum MPDU start spacing , */
 125         ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_16;
 126
 127         ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 128
 129         /*
 130          *hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 131          *base on ant_num
 132          *rx_mask: RX mask
 133          *if rx_ant =1 rx_mask[0]=0xff;==>MCS0-MCS7
 134          *if rx_ant =2 rx_mask[1]=0xff;==>MCS8-MCS15
 135          *if rx_ant >=3 rx_mask[2]=0xff;
 136          *if BW_40 rx_mask[4]=0x01;
 137          *highest supported RX rate
 138          */
 139         if (get_rf_type(rtlphy) == RF_1T2R || get_rf_type(rtlphy) == RF_2T2R) {
 140
 141                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T2R or 2T2R\n"));
 142
 143                 ht_cap->mcs.rx_mask[0] = 0xFF;
 144                 ht_cap->mcs.rx_mask[1] = 0xFF;
 145                 ht_cap->mcs.rx_mask[4] = 0x01;
 146
 147                 ht_cap->mcs.rx_highest = MAX_BIT_RATE_40MHZ_MCS15;
 148         } else if (get_rf_type(rtlphy) == RF_1T1R) {
 149
 150                 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, ("1T1R\n"));
 151
 152                 ht_cap->mcs.rx_mask[0] = 0xFF;
 153                 ht_cap->mcs.rx_mask[1] = 0x00;
 154                 ht_cap->mcs.rx_mask[4] = 0x01;
 155
 156                 ht_cap->mcs.rx_highest = MAX_BIT_RATE_40MHZ_MCS7;
 157         }
 158 }
 159
 160 static void _rtl_init_mac80211(struct ieee80211_hw *hw)
 161 {
 162         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 163         struct rtl_efuse *rtlefuse = rtl_efuse(rtl_priv(hw));
 164         struct ieee80211_supported_band *sband;
 165
 166         /* <1> use  mac->bands as mem for hw->wiphy->bands */
 167         sband = &(rtlmac->bands[IEEE80211_BAND_2GHZ]);
 168
 169         /*
 170          * <2> set hw->wiphy->bands[IEEE80211_BAND_2GHZ]
 171          * to default value(1T1R)
 172          */
 173         memcpy(&(rtlmac->bands[IEEE80211_BAND_2GHZ]), &rtl_band_2ghz,
 174                sizeof(struct ieee80211_supported_band));
 175
 176         /* <3> init ht cap base on ant_num */
 177         _rtl_init_hw_ht_capab(hw, &sband->ht_cap);
 178
 179         /* <4> set mac->sband to wiphy->sband */
 180         hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
 181
 182         /* <5> set hw caps */
 183         hw->flags = IEEE80211_HW_SIGNAL_DBM |
 184             IEEE80211_HW_RX_INCLUDES_FCS |
 185             IEEE80211_HW_BEACON_FILTER | IEEE80211_HW_AMPDU_AGGREGATION | /*PS*/
 186             /*IEEE80211_HW_SUPPORTS_PS | */
 187             /*IEEE80211_HW_PS_NULLFUNC_STACK | */
 188             /*IEEE80211_HW_SUPPORTS_DYNAMIC_PS | */
 189             IEEE80211_HW_REPORTS_TX_ACK_STATUS | 0;
 190
 191         hw->wiphy->interface_modes =
 192             BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC);
 193
 194         hw->wiphy->rts_threshold = 2347;
 195
 196         hw->queues = AC_MAX;
 197         hw->extra_tx_headroom = RTL_TX_HEADER_SIZE;
 198
 199         /* TODO: Correct this value for our hw */
 200         /* TODO: define these hard code value */
 201         hw->channel_change_time = 100;
 202         hw->max_listen_interval = 5;
 203         hw->max_rate_tries = 4;
 204         /* hw->max_rates = 1; */
 205
 206         /* <6> mac address */
 207         if (is_valid_ether_addr(rtlefuse->dev_addr)) {
 208                 SET_IEEE80211_PERM_ADDR(hw, rtlefuse->dev_addr);
 209         } else {
 210                 u8 rtlmac[] = { 0x00, 0xe0, 0x4c, 0x81, 0x92, 0x00 };
 211                 get_random_bytes((rtlmac + (ETH_ALEN - 1)), 1);
 212                 SET_IEEE80211_PERM_ADDR(hw, rtlmac);
 213         }
 214
 215 }
 216
 217 static void _rtl_init_deferred_work(struct ieee80211_hw *hw)
 218 {
 219         struct rtl_priv *rtlpriv = rtl_priv(hw);
 220
 221         /* <1> timer */
 222         init_timer(&rtlpriv->works.watchdog_timer);
 223         setup_timer(&rtlpriv->works.watchdog_timer,
 224                     rtl_watch_dog_timer_callback, (unsigned long)hw);
 225
 226         /* <2> work queue */
 227         rtlpriv->works.hw = hw;
 228         rtlpriv->works.rtl_wq = alloc_workqueue(rtlpriv->cfg->name, 0, 0);
 229         INIT_DELAYED_WORK(&rtlpriv->works.watchdog_wq,
 230                           (void *)rtl_watchdog_wq_callback);
 231         INIT_DELAYED_WORK(&rtlpriv->works.ips_nic_off_wq,
 232                           (void *)rtl_ips_nic_off_wq_callback);
 233
 234 }
 235
 236 void rtl_deinit_deferred_work(struct ieee80211_hw *hw)
 237 {
 238         struct rtl_priv *rtlpriv = rtl_priv(hw);
 239
 240         del_timer_sync(&rtlpriv->works.watchdog_timer);
 241
 242         cancel_delayed_work(&rtlpriv->works.watchdog_wq);
 243         cancel_delayed_work(&rtlpriv->works.ips_nic_off_wq);
 244 }
 245
 246 void rtl_init_rfkill(struct ieee80211_hw *hw)
 247 {
 248         struct rtl_priv *rtlpriv = rtl_priv(hw);
 249
 250         bool radio_state;
 251         bool blocked;
 252         u8 valid = 0;
 253
 254         radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);
 255
 256         /*set init state to that of switch */
 257         rtlpriv->rfkill.rfkill_state = radio_state;
 258         printk(KERN_INFO "rtlwifi: wireless switch is %s\n",
 259                rtlpriv->rfkill.rfkill_state ? "on" : "off");
 260
 261         if (valid) {
 262                 rtlpriv->rfkill.rfkill_state = radio_state;
 263
 264                 blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
 265                 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 266         }
 267
 268         wiphy_rfkill_start_polling(hw->wiphy);
 269 }
 270
 271 void rtl_deinit_rfkill(struct ieee80211_hw *hw)
 272 {
 273         wiphy_rfkill_stop_polling(hw->wiphy);
 274 }
 275
 276 int rtl_init_core(struct ieee80211_hw *hw)
 277 {
 278         struct rtl_priv *rtlpriv = rtl_priv(hw);
 279         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 280
 281         /* <1> init mac80211 */
 282         _rtl_init_mac80211(hw);
 283         rtlmac->hw = hw;
 284
 285         /* <2> rate control register */
 286         if (rtl_rate_control_register()) {
 287                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 288                          ("rtl: Unable to register rtl_rc,"
 289                           "use default RC !!\n"));
 290         } else {
 291                 hw->rate_control_algorithm = "rtl_rc";
 292         }
 293
 294         /*
 295          * <3> init CRDA must come after init
 296          * mac80211 hw  in _rtl_init_mac80211.
 297          */
 298         if (rtl_regd_init(hw, rtl_reg_notifier)) {
 299                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("REGD init failed\n"));
 300                 return 1;
 301         } else {
 302                 /* CRDA regd hint must after init CRDA */
 303                 if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
 304                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 305                                  ("regulatory_hint fail\n"));
 306                 }
 307         }
 308
 309         /* <4> locks */
 310         mutex_init(&rtlpriv->locks.conf_mutex);
 311         spin_lock_init(&rtlpriv->locks.ips_lock);
 312         spin_lock_init(&rtlpriv->locks.irq_th_lock);
 313         spin_lock_init(&rtlpriv->locks.h2c_lock);
 314         spin_lock_init(&rtlpriv->locks.rf_ps_lock);
 315         spin_lock_init(&rtlpriv->locks.rf_lock);
 316         spin_lock_init(&rtlpriv->locks.lps_lock);
 317
 318         rtlmac->link_state = MAC80211_NOLINK;
 319
 320         /* <5> init deferred work */
 321         _rtl_init_deferred_work(hw);
 322
 323         return 0;
 324 }
 325
 326 void rtl_deinit_core(struct ieee80211_hw *hw)
 327 {
 328          /*RC*/
 329         rtl_rate_control_unregister();
 330 }
 331
 332 void rtl_init_rx_config(struct ieee80211_hw *hw)
 333 {
 334         struct rtl_priv *rtlpriv = rtl_priv(hw);
 335         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 336
 337         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
 338         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_MGT_FILTER,
 339                                       (u8 *) (&mac->rx_mgt_filter));
 340         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_CTRL_FILTER,
 341                                       (u8 *) (&mac->rx_ctrl_filter));
 342         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_DATA_FILTER,
 343                                       (u8 *) (&mac->rx_data_filter));
 344 }
 345
 346 /*********************************************************
 347  *
 348  * tx information functions
 349  *
 350  *********************************************************/
 351 static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
 352                                           struct rtl_tcb_desc *tcb_desc,
 353                                           struct ieee80211_tx_info *info)
 354 {
 355         struct rtl_priv *rtlpriv = rtl_priv(hw);
 356         u8 rate_flag = info->control.rates[0].flags;
 357
 358         tcb_desc->use_shortpreamble = false;
 359
 360         /* 1M can only use Long Preamble. 11B spec */
 361         if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
 362                 return;
 363         else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 364                 tcb_desc->use_shortpreamble = true;
 365
 366         return;
 367 }
 368
 369 static void _rtl_query_shortgi(struct ieee80211_hw *hw,
 370                                struct rtl_tcb_desc *tcb_desc,
 371                                struct ieee80211_tx_info *info)
 372 {
 373         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 374         u8 rate_flag = info->control.rates[0].flags;
 375
 376         tcb_desc->use_shortgi = false;
 377
 378         if (!mac->ht_enable)
 379                 return;
 380
 381         if (!mac->sgi_40 && !mac->sgi_20)
 382                 return;
 383
 384         if ((mac->bw_40 == true) && mac->sgi_40)
 385                 tcb_desc->use_shortgi = true;
 386         else if ((mac->bw_40 == false) && mac->sgi_20)
 387                 tcb_desc->use_shortgi = true;
 388
 389         if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
 390                 tcb_desc->use_shortgi = false;
 391
 392 }
 393
 394 static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
 395                                        struct rtl_tcb_desc *tcb_desc,
 396                                        struct ieee80211_tx_info *info)
 397 {
 398         struct rtl_priv *rtlpriv = rtl_priv(hw);
 399         u8 rate_flag = info->control.rates[0].flags;
 400
 401         /* Common Settings */
 402         tcb_desc->b_rts_stbc = false;
 403         tcb_desc->b_cts_enable = false;
 404         tcb_desc->rts_sc = 0;
 405         tcb_desc->b_rts_bw = false;
 406         tcb_desc->b_rts_use_shortpreamble = false;
 407         tcb_desc->b_rts_use_shortgi = false;
 408
 409         if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 410                 /* Use CTS-to-SELF in protection mode. */
 411                 tcb_desc->b_rts_enable = true;
 412                 tcb_desc->b_cts_enable = true;
 413                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 414         } else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
 415                 /* Use RTS-CTS in protection mode. */
 416                 tcb_desc->b_rts_enable = true;
 417                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 418         }
 419
 420 }
 421
 422 static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
 423                                    struct rtl_tcb_desc *tcb_desc)
 424 {
 425         struct rtl_priv *rtlpriv = rtl_priv(hw);
 426         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 427
 428         if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
 429                 if (mac->opmode == NL80211_IFTYPE_STATION)
 430                         tcb_desc->ratr_index = 0;
 431                 else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
 432                         if (tcb_desc->b_multicast || tcb_desc->b_broadcast) {
 433                                 tcb_desc->hw_rate =
 434                                     rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
 435                                 tcb_desc->use_driver_rate = 1;
 436                         } else {
 437                                 /* TODO */
 438                         }
 439                 }
 440         }
 441
 442         if (rtlpriv->dm.b_useramask) {
 443                 /* TODO we will differentiate adhoc and station futrue  */
 444                 tcb_desc->mac_id = 0;
 445
 446                 if ((mac->mode == WIRELESS_MODE_N_24G) ||
 447                     (mac->mode == WIRELESS_MODE_N_5G)) {
 448                         tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
 449                 } else if (mac->mode & WIRELESS_MODE_G) {
 450                         tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
 451                 } else if (mac->mode & WIRELESS_MODE_B) {
 452                         tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
 453                 }
 454         }
 455
 456 }
 457
 458 static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
 459                                       struct rtl_tcb_desc *tcb_desc)
 460 {
 461         struct rtl_priv *rtlpriv = rtl_priv(hw);
 462         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 463
 464         tcb_desc->b_packet_bw = false;
 465
 466         if (!mac->bw_40 || !mac->ht_enable)
 467                 return;
 468
 469         if (tcb_desc->b_multicast || tcb_desc->b_broadcast)
 470                 return;
 471
 472         /*use legency rate, shall use 20MHz */
 473         if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
 474                 return;
 475
 476         tcb_desc->b_packet_bw = true;
 477 }
 478
 479 static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
 480 {
 481         struct rtl_priv *rtlpriv = rtl_priv(hw);
 482         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 483         u8 hw_rate;
 484
 485         if (get_rf_type(rtlphy) == RF_2T2R)
 486                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
 487         else
 488                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];
 489
 490         return hw_rate;
 491 }
 492
 493 void rtl_get_tcb_desc(struct ieee80211_hw *hw,
 494                       struct ieee80211_tx_info *info,
 495                       struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
 496 {
 497         struct rtl_priv *rtlpriv = rtl_priv(hw);
 498         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 499         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 500         struct ieee80211_rate *txrate;
 501         u16 fc = le16_to_cpu(hdr->frame_control);
 502
 503         memset(tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 504
 505         if (ieee80211_is_data(fc)) {
 506                 txrate = ieee80211_get_tx_rate(hw, info);
 507                 tcb_desc->hw_rate = txrate->hw_value;
 508
 509                 /*
 510                  *we set data rate RTL_RC_CCK_RATE1M
 511                  *in rtl_rc.c   if skb is special data or
 512                  *mgt which need low data rate.
 513                  */
 514
 515                 /*
 516                  *So tcb_desc->hw_rate is just used for
 517                  *special data and mgt frames
 518                  */
 519                 if (tcb_desc->hw_rate < rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M]) {
 520                         tcb_desc->use_driver_rate = true;
 521                         tcb_desc->ratr_index = 7;
 522
 523                         tcb_desc->hw_rate =
 524                             rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 525                         tcb_desc->disable_ratefallback = 1;
 526                 } else {
 527                         /*
 528                          *because hw will nerver use hw_rate
 529                          *when tcb_desc->use_driver_rate = false
 530                          *so we never set highest N rate here,
 531                          *and N rate will all be controled by FW
 532                          *when tcb_desc->use_driver_rate = false
 533                          */
 534                         if (rtlmac->ht_enable) {
 535                                 tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
 536                         } else {
 537                                 if (rtlmac->mode == WIRELESS_MODE_B) {
 538                                         tcb_desc->hw_rate =
 539                                            rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
 540                                 } else {
 541                                         tcb_desc->hw_rate =
 542                                            rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
 543                                 }
 544                         }
 545                 }
 546
 547                 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 548                         tcb_desc->b_multicast = 1;
 549                 else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
 550                         tcb_desc->b_broadcast = 1;
 551
 552                 _rtl_txrate_selectmode(hw, tcb_desc);
 553                 _rtl_query_bandwidth_mode(hw, tcb_desc);
 554                 _rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
 555                 _rtl_query_shortgi(hw, tcb_desc, info);
 556                 _rtl_query_protection_mode(hw, tcb_desc, info);
 557         } else {
 558                 tcb_desc->use_driver_rate = true;
 559                 tcb_desc->ratr_index = 7;
 560                 tcb_desc->disable_ratefallback = 1;
 561                 tcb_desc->mac_id = 0;
 562
 563                 tcb_desc->hw_rate = rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 564         }
 565 }
 566 EXPORT_SYMBOL(rtl_get_tcb_desc);
 567
 568 bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb)
 569 {
 570         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 571         struct rtl_priv *rtlpriv = rtl_priv(hw);
 572         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 573         u16 fc = le16_to_cpu(hdr->frame_control);
 574
 575         if (ieee80211_is_auth(fc)) {
 576                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 577                 rtl_ips_nic_on(hw);
 578
 579                 mac->link_state = MAC80211_LINKING;
 580         }
 581
 582         return true;
 583 }
 584
 585 bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 586 {
 587         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 588         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 589         struct rtl_priv *rtlpriv = rtl_priv(hw);
 590         u16 fc = le16_to_cpu(hdr->frame_control);
 591         u8 *act = (u8 *) (((u8 *) skb->data + MAC80211_3ADDR_LEN));
 592         u8 category;
 593
 594         if (!ieee80211_is_action(fc))
 595                 return true;
 596
 597         category = *act;
 598         act++;
 599         switch (category) {
 600         case ACT_CAT_BA:
 601                 switch (*act) {
 602                 case ACT_ADDBAREQ:
 603                         if (mac->act_scanning)
 604                                 return false;
 605
 606                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 607                                  ("%s ACT_ADDBAREQ From :" MAC_FMT "\n",
 608                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 609                         break;
 610                 case ACT_ADDBARSP:
 611                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 612                                  ("%s ACT_ADDBARSP From :" MAC_FMT "\n",
 613                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 614                         break;
 615                 case ACT_DELBA:
 616                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 617                                  ("ACT_ADDBADEL From :" MAC_FMT "\n",
 618                                   MAC_ARG(hdr->addr2)));
 619                         break;
 620                 }
 621                 break;
 622         default:
 623                 break;
 624         }
 625
 626         return true;
 627 }
 628
 629 /*should call before software enc*/
 630 u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 631 {
 632         struct rtl_priv *rtlpriv = rtl_priv(hw);
 633         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 634         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 635         u16 fc = le16_to_cpu(hdr->frame_control);
 636         u16 ether_type;
 637         u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
 638         const struct iphdr *ip;
 639
 640         if (!ieee80211_is_data(fc))
 641                 goto end;
 642
 643         if (ieee80211_is_nullfunc(fc))
 644                 return true;
 645
 646         ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
 647                               SNAP_SIZE + PROTOC_TYPE_SIZE);
 648         ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
 649         ether_type = ntohs(ether_type);
 650
 651         if (ETH_P_IP == ether_type) {
 652                 if (IPPROTO_UDP == ip->protocol) {
 653                         struct udphdr *udp = (struct udphdr *)((u8 *) ip +
 654                                                                (ip->ihl << 2));
 655                         if (((((u8 *) udp)[1] == 68) &&
 656                              (((u8 *) udp)[3] == 67)) ||
 657                             ((((u8 *) udp)[1] == 67) &&
 658                              (((u8 *) udp)[3] == 68))) {
 659                                 /*
 660                                  * 68 : UDP BOOTP client
 661                                  * 67 : UDP BOOTP server
 662                                  */
 663                                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
 664                                          DBG_DMESG, ("dhcp %s !!\n",
 665                                                      (is_tx) ? "Tx" : "Rx"));
 666
 667                                 if (is_tx) {
 668                                         rtl_lps_leave(hw);
 669                                         ppsc->last_delaylps_stamp_jiffies =
 670                                             jiffies;
 671                                 }
 672
 673                                 return true;
 674                         }
 675                 }
 676         } else if (ETH_P_ARP == ether_type) {
 677                 if (is_tx) {
 678                         rtl_lps_leave(hw);
 679                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 680                 }
 681
 682                 return true;
 683         } else if (ETH_P_PAE == ether_type) {
 684                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 685                          ("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
 686
 687                 if (is_tx) {
 688                         rtl_lps_leave(hw);
 689                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 690                 }
 691
 692                 return true;
 693         } else if (0x86DD == ether_type) {
 694                 return true;
 695         }
 696
 697 end:
 698         return false;
 699 }
 700
 701 /*********************************************************
 702  *
 703  * functions called by core.c
 704  *
 705  *********************************************************/
 706 int rtl_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra, u16 tid, u16 *ssn)
 707 {
 708         struct rtl_priv *rtlpriv = rtl_priv(hw);
 709         struct rtl_tid_data *tid_data;
 710         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 711
 712         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 713                  ("on ra = %pM tid = %d\n", ra, tid));
 714
 715         if (unlikely(tid >= MAX_TID_COUNT))
 716                 return -EINVAL;
 717
 718         if (mac->tids[tid].agg.agg_state != RTL_AGG_OFF) {
 719                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 720                          ("Start AGG when state is not RTL_AGG_OFF !\n"));
 721                 return -ENXIO;
 722         }
 723
 724         tid_data = &mac->tids[tid];
 725         *ssn = SEQ_TO_SN(tid_data->seq_number);
 726
 727         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 728                  ("HW queue is empty tid:%d\n", tid));
 729         tid_data->agg.agg_state = RTL_AGG_ON;
 730
 731         ieee80211_start_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 732
 733         return 0;
 734 }
 735
 736 int rtl_tx_agg_stop(struct ieee80211_hw *hw, const u8 * ra, u16 tid)
 737 {
 738         int ssn = -1;
 739         struct rtl_priv *rtlpriv = rtl_priv(hw);
 740         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 741         struct rtl_tid_data *tid_data;
 742
 743         if (!ra) {
 744                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
 745                 return -EINVAL;
 746         }
 747
 748         if (unlikely(tid >= MAX_TID_COUNT))
 749                 return -EINVAL;
 750
 751         if (mac->tids[tid].agg.agg_state != RTL_AGG_ON)
 752                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 753                          ("Stopping AGG while state not ON or starting\n"));
 754
 755         tid_data = &mac->tids[tid];
 756         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
 757
 758         mac->tids[tid].agg.agg_state = RTL_AGG_OFF;
 759
 760         ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 761
 762         return 0;
 763 }
 764
 765 /*********************************************************
 766  *
 767  * wq & timer callback functions
 768  *
 769  *********************************************************/
 770 void rtl_watchdog_wq_callback(void *data)
 771 {
 772         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 773                                                             struct rtl_works,
 774                                                             watchdog_wq);
 775         struct ieee80211_hw *hw = rtlworks->hw;
 776         struct rtl_priv *rtlpriv = rtl_priv(hw);
 777         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 778         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 779
 780         bool b_busytraffic = false;
 781         bool b_higher_busytraffic = false;
 782         bool b_higher_busyrxtraffic = false;
 783         bool b_higher_busytxtraffic = false;
 784
 785         u8 idx = 0;
 786         u32 rx_cnt_inp4eriod = 0;
 787         u32 tx_cnt_inp4eriod = 0;
 788         u32 aver_rx_cnt_inperiod = 0;
 789         u32 aver_tx_cnt_inperiod = 0;
 790
 791         bool benter_ps = false;
 792
 793         if (is_hal_stop(rtlhal))
 794                 return;
 795
 796         /* <1> Determine if action frame is allowed */
 797         if (mac->link_state > MAC80211_NOLINK) {
 798                 if (mac->cnt_after_linked < 20)
 799                         mac->cnt_after_linked++;
 800         } else {
 801                 mac->cnt_after_linked = 0;
 802         }
 803
 804         /* <2> DM */
 805         rtlpriv->cfg->ops->dm_watchdog(hw);
 806
 807         /*
 808          *<3> to check if traffic busy, if
 809          * busytraffic we don't change channel
 810          */
 811         if (mac->link_state >= MAC80211_LINKED) {
 812
 813                 /* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
 814                 for (idx = 0; idx <= 2; idx++) {
 815                         rtlpriv->link_info.num_rx_in4period[idx] =
 816                             rtlpriv->link_info.num_rx_in4period[idx + 1];
 817                         rtlpriv->link_info.num_tx_in4period[idx] =
 818                             rtlpriv->link_info.num_tx_in4period[idx + 1];
 819                 }
 820                 rtlpriv->link_info.num_rx_in4period[3] =
 821                     rtlpriv->link_info.num_rx_inperiod;
 822                 rtlpriv->link_info.num_tx_in4period[3] =
 823                     rtlpriv->link_info.num_tx_inperiod;
 824                 for (idx = 0; idx <= 3; idx++) {
 825                         rx_cnt_inp4eriod +=
 826                             rtlpriv->link_info.num_rx_in4period[idx];
 827                         tx_cnt_inp4eriod +=
 828                             rtlpriv->link_info.num_tx_in4period[idx];
 829                 }
 830                 aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
 831                 aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;
 832
 833                 /* (2) check traffic busy */
 834                 if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
 835                         b_busytraffic = true;
 836
 837                 /* Higher Tx/Rx data. */
 838                 if (aver_rx_cnt_inperiod > 4000 ||
 839                     aver_tx_cnt_inperiod > 4000) {
 840                         b_higher_busytraffic = true;
 841
 842                         /* Extremely high Rx data. */
 843                         if (aver_rx_cnt_inperiod > 5000)
 844                                 b_higher_busyrxtraffic = true;
 845                         else
 846                                 b_higher_busytxtraffic = false;
 847                 }
 848
 849                 if (((rtlpriv->link_info.num_rx_inperiod +
 850                       rtlpriv->link_info.num_tx_inperiod) > 8) ||
 851                     (rtlpriv->link_info.num_rx_inperiod > 2))
 852                         benter_ps = false;
 853                 else
 854                         benter_ps = true;
 855
 856                 /* LeisurePS only work in infra mode. */
 857                 if (benter_ps)
 858                         rtl_lps_enter(hw);
 859                 else
 860                         rtl_lps_leave(hw);
 861         }
 862
 863         rtlpriv->link_info.num_rx_inperiod = 0;
 864         rtlpriv->link_info.num_tx_inperiod = 0;
 865
 866         rtlpriv->link_info.b_busytraffic = b_busytraffic;
 867         rtlpriv->link_info.b_higher_busytraffic = b_higher_busytraffic;
 868         rtlpriv->link_info.b_higher_busyrxtraffic = b_higher_busyrxtraffic;
 869
 870 }
 871
 872 void rtl_watch_dog_timer_callback(unsigned long data)
 873 {
 874         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
 875         struct rtl_priv *rtlpriv = rtl_priv(hw);
 876
 877         queue_delayed_work(rtlpriv->works.rtl_wq,
 878                            &rtlpriv->works.watchdog_wq, 0);
 879
 880         mod_timer(&rtlpriv->works.watchdog_timer,
 881                   jiffies + MSECS(RTL_WATCH_DOG_TIME));
 882 }
 883
 884 /*********************************************************
 885  *
 886  * sysfs functions
 887  *
 888  *********************************************************/
 889 static ssize_t rtl_show_debug_level(struct device *d,
 890                                     struct device_attribute *attr, char *buf)
 891 {
 892         struct ieee80211_hw *hw = dev_get_drvdata(d);
 893         struct rtl_priv *rtlpriv = rtl_priv(hw);
 894
 895         return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
 896 }
 897
 898 static ssize_t rtl_store_debug_level(struct device *d,
 899                                      struct device_attribute *attr,
 900                                      const char *buf, size_t count)
 901 {
 902         struct ieee80211_hw *hw = dev_get_drvdata(d);
 903         struct rtl_priv *rtlpriv = rtl_priv(hw);
 904         unsigned long val;
 905         int ret;
 906
 907         ret = strict_strtoul(buf, 0, &val);
 908         if (ret) {
 909                 printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
 910         } else {
 911                 rtlpriv->dbg.global_debuglevel = val;
 912                 printk(KERN_DEBUG "debuglevel:%x\n",
 913                        rtlpriv->dbg.global_debuglevel);
 914         }
 915
 916         return strnlen(buf, count);
 917 }
 918
 919 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 920                    rtl_show_debug_level, rtl_store_debug_level);
 921
 922 static struct attribute *rtl_sysfs_entries[] = {
 923
 924         &dev_attr_debug_level.attr,
 925
 926         NULL
 927 };
 928
 929 /*
 930  * "name" is folder name witch will be
 931  * put in device directory like :
 932  * sys/devices/pci0000:00/0000:00:1c.4/
 933  * 0000:06:00.0/rtl_sysfs
 934  */
 935 struct attribute_group rtl_attribute_group = {
 936         .name = "rtlsysfs",
 937         .attrs = rtl_sysfs_entries,
 938 };
 939
 940 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
 941 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
 942 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
 943 MODULE_LICENSE("GPL");
 944 MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
 945
 946 static int __init rtl_core_module_init(void)
 947 {
 948         return 0;
 949 }
 950
 951 static void __exit rtl_core_module_exit(void)
 952 {
 953 }
 954
 955 module_init(rtl_core_module_init);
 956 module_exit(rtl_core_module_exit);