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 = create_workqueue(rtlpriv->cfg->name);
 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         /*set init state to rf on */
 255         rtlpriv->rfkill.rfkill_state = 1;
 256
 257         radio_state = rtlpriv->cfg->ops->radio_onoff_checking(hw, &valid);
 258
 259         if (valid) {
 260                 RT_TRACE(rtlpriv, COMP_RF, DBG_DMESG,
 261                          (KERN_INFO "wireless switch is %s\n",
 262                           rtlpriv->rfkill.rfkill_state ? "on" : "off"));
 263
 264                 rtlpriv->rfkill.rfkill_state = radio_state;
 265
 266                 blocked = (rtlpriv->rfkill.rfkill_state == 1) ? 0 : 1;
 267                 wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
 268         }
 269
 270         wiphy_rfkill_start_polling(hw->wiphy);
 271 }
 272
 273 void rtl_deinit_rfkill(struct ieee80211_hw *hw)
 274 {
 275         wiphy_rfkill_stop_polling(hw->wiphy);
 276 }
 277
 278 int rtl_init_core(struct ieee80211_hw *hw)
 279 {
 280         struct rtl_priv *rtlpriv = rtl_priv(hw);
 281         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 282
 283         /* <1> init mac80211 */
 284         _rtl_init_mac80211(hw);
 285         rtlmac->hw = hw;
 286
 287         /* <2> rate control register */
 288         if (rtl_rate_control_register()) {
 289                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 290                          ("rtl: Unable to register rtl_rc,"
 291                           "use default RC !!\n"));
 292         } else {
 293                 hw->rate_control_algorithm = "rtl_rc";
 294         }
 295
 296         /*
 297          * <3> init CRDA must come after init
 298          * mac80211 hw  in _rtl_init_mac80211.
 299          */
 300         if (rtl_regd_init(hw, rtl_reg_notifier)) {
 301                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("REGD init failed\n"));
 302                 return 1;
 303         } else {
 304                 /* CRDA regd hint must after init CRDA */
 305                 if (regulatory_hint(hw->wiphy, rtlpriv->regd.alpha2)) {
 306                         RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 307                                  ("regulatory_hint fail\n"));
 308                 }
 309         }
 310
 311         /* <4> locks */
 312         sema_init(&rtlpriv->locks.ips_sem, 1);
 313         sema_init(&rtlpriv->locks.conf_sem, 1);
 314         spin_lock_init(&rtlpriv->locks.irq_th_lock);
 315         spin_lock_init(&rtlpriv->locks.h2c_lock);
 316         spin_lock_init(&rtlpriv->locks.rf_ps_lock);
 317         spin_lock_init(&rtlpriv->locks.rf_lock);
 318         spin_lock_init(&rtlpriv->locks.lps_lock);
 319
 320         rtlmac->link_state = MAC80211_NOLINK;
 321
 322         /* <5> init deferred work */
 323         _rtl_init_deferred_work(hw);
 324
 325         return 0;
 326 }
 327
 328 void rtl_deinit_core(struct ieee80211_hw *hw)
 329 {
 330          /*RC*/
 331         rtl_rate_control_unregister();
 332 }
 333
 334 void rtl_init_rx_config(struct ieee80211_hw *hw)
 335 {
 336         struct rtl_priv *rtlpriv = rtl_priv(hw);
 337         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 338
 339         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_RCR, (u8 *) (&mac->rx_conf));
 340         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_MGT_FILTER,
 341                                       (u8 *) (&mac->rx_mgt_filter));
 342         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_CTRL_FILTER,
 343                                       (u8 *) (&mac->rx_ctrl_filter));
 344         rtlpriv->cfg->ops->get_hw_reg(hw, HW_VAR_DATA_FILTER,
 345                                       (u8 *) (&mac->rx_data_filter));
 346 }
 347
 348 /*********************************************************
 349  *
 350  * tx information functions
 351  *
 352  *********************************************************/
 353 static void _rtl_qurey_shortpreamble_mode(struct ieee80211_hw *hw,
 354                                           struct rtl_tcb_desc *tcb_desc,
 355                                           struct ieee80211_tx_info *info)
 356 {
 357         struct rtl_priv *rtlpriv = rtl_priv(hw);
 358         u8 rate_flag = info->control.rates[0].flags;
 359
 360         tcb_desc->use_shortpreamble = false;
 361
 362         /* 1M can only use Long Preamble. 11B spec */
 363         if (tcb_desc->hw_rate == rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M])
 364                 return;
 365         else if (rate_flag & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 366                 tcb_desc->use_shortpreamble = true;
 367
 368         return;
 369 }
 370
 371 static void _rtl_query_shortgi(struct ieee80211_hw *hw,
 372                                struct rtl_tcb_desc *tcb_desc,
 373                                struct ieee80211_tx_info *info)
 374 {
 375         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 376         u8 rate_flag = info->control.rates[0].flags;
 377
 378         tcb_desc->use_shortgi = false;
 379
 380         if (!mac->ht_enable)
 381                 return;
 382
 383         if (!mac->sgi_40 && !mac->sgi_20)
 384                 return;
 385
 386         if ((mac->bw_40 == true) && mac->sgi_40)
 387                 tcb_desc->use_shortgi = true;
 388         else if ((mac->bw_40 == false) && mac->sgi_20)
 389                 tcb_desc->use_shortgi = true;
 390
 391         if (!(rate_flag & IEEE80211_TX_RC_SHORT_GI))
 392                 tcb_desc->use_shortgi = false;
 393
 394 }
 395
 396 static void _rtl_query_protection_mode(struct ieee80211_hw *hw,
 397                                        struct rtl_tcb_desc *tcb_desc,
 398                                        struct ieee80211_tx_info *info)
 399 {
 400         struct rtl_priv *rtlpriv = rtl_priv(hw);
 401         u8 rate_flag = info->control.rates[0].flags;
 402
 403         /* Common Settings */
 404         tcb_desc->b_rts_stbc = false;
 405         tcb_desc->b_cts_enable = false;
 406         tcb_desc->rts_sc = 0;
 407         tcb_desc->b_rts_bw = false;
 408         tcb_desc->b_rts_use_shortpreamble = false;
 409         tcb_desc->b_rts_use_shortgi = false;
 410
 411         if (rate_flag & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 412                 /* Use CTS-to-SELF in protection mode. */
 413                 tcb_desc->b_rts_enable = true;
 414                 tcb_desc->b_cts_enable = true;
 415                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 416         } else if (rate_flag & IEEE80211_TX_RC_USE_RTS_CTS) {
 417                 /* Use RTS-CTS in protection mode. */
 418                 tcb_desc->b_rts_enable = true;
 419                 tcb_desc->rts_rate = rtlpriv->cfg->maps[RTL_RC_OFDM_RATE24M];
 420         }
 421
 422 }
 423
 424 static void _rtl_txrate_selectmode(struct ieee80211_hw *hw,
 425                                    struct rtl_tcb_desc *tcb_desc)
 426 {
 427         struct rtl_priv *rtlpriv = rtl_priv(hw);
 428         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 429
 430         if (!tcb_desc->disable_ratefallback || !tcb_desc->use_driver_rate) {
 431                 if (mac->opmode == NL80211_IFTYPE_STATION)
 432                         tcb_desc->ratr_index = 0;
 433                 else if (mac->opmode == NL80211_IFTYPE_ADHOC) {
 434                         if (tcb_desc->b_multicast || tcb_desc->b_broadcast) {
 435                                 tcb_desc->hw_rate =
 436                                     rtlpriv->cfg->maps[RTL_RC_CCK_RATE2M];
 437                                 tcb_desc->use_driver_rate = 1;
 438                         } else {
 439                                 /* TODO */
 440                         }
 441                 }
 442         }
 443
 444         if (rtlpriv->dm.b_useramask) {
 445                 /* TODO we will differentiate adhoc and station futrue  */
 446                 tcb_desc->mac_id = 0;
 447
 448                 if ((mac->mode == WIRELESS_MODE_N_24G) ||
 449                     (mac->mode == WIRELESS_MODE_N_5G)) {
 450                         tcb_desc->ratr_index = RATR_INX_WIRELESS_NGB;
 451                 } else if (mac->mode & WIRELESS_MODE_G) {
 452                         tcb_desc->ratr_index = RATR_INX_WIRELESS_GB;
 453                 } else if (mac->mode & WIRELESS_MODE_B) {
 454                         tcb_desc->ratr_index = RATR_INX_WIRELESS_B;
 455                 }
 456         }
 457
 458 }
 459
 460 static void _rtl_query_bandwidth_mode(struct ieee80211_hw *hw,
 461                                       struct rtl_tcb_desc *tcb_desc)
 462 {
 463         struct rtl_priv *rtlpriv = rtl_priv(hw);
 464         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 465
 466         tcb_desc->b_packet_bw = false;
 467
 468         if (!mac->bw_40 || !mac->ht_enable)
 469                 return;
 470
 471         if (tcb_desc->b_multicast || tcb_desc->b_broadcast)
 472                 return;
 473
 474         /*use legency rate, shall use 20MHz */
 475         if (tcb_desc->hw_rate <= rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M])
 476                 return;
 477
 478         tcb_desc->b_packet_bw = true;
 479 }
 480
 481 static u8 _rtl_get_highest_n_rate(struct ieee80211_hw *hw)
 482 {
 483         struct rtl_priv *rtlpriv = rtl_priv(hw);
 484         struct rtl_phy *rtlphy = &(rtlpriv->phy);
 485         u8 hw_rate;
 486
 487         if (get_rf_type(rtlphy) == RF_2T2R)
 488                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS15];
 489         else
 490                 hw_rate = rtlpriv->cfg->maps[RTL_RC_HT_RATEMCS7];
 491
 492         return hw_rate;
 493 }
 494
 495 void rtl_get_tcb_desc(struct ieee80211_hw *hw,
 496                       struct ieee80211_tx_info *info,
 497                       struct sk_buff *skb, struct rtl_tcb_desc *tcb_desc)
 498 {
 499         struct rtl_priv *rtlpriv = rtl_priv(hw);
 500         struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
 501         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 502         struct ieee80211_rate *txrate;
 503         u16 fc = le16_to_cpu(hdr->frame_control);
 504
 505         memset(tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 506
 507         if (ieee80211_is_data(fc)) {
 508                 txrate = ieee80211_get_tx_rate(hw, info);
 509                 tcb_desc->hw_rate = txrate->hw_value;
 510
 511                 /*
 512                  *we set data rate RTL_RC_CCK_RATE1M
 513                  *in rtl_rc.c   if skb is special data or
 514                  *mgt which need low data rate.
 515                  */
 516
 517                 /*
 518                  *So tcb_desc->hw_rate is just used for
 519                  *special data and mgt frames
 520                  */
 521                 if (tcb_desc->hw_rate < rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M]) {
 522                         tcb_desc->use_driver_rate = true;
 523                         tcb_desc->ratr_index = 7;
 524
 525                         tcb_desc->hw_rate =
 526                             rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 527                         tcb_desc->disable_ratefallback = 1;
 528                 } else {
 529                         /*
 530                          *because hw will nerver use hw_rate
 531                          *when tcb_desc->use_driver_rate = false
 532                          *so we never set highest N rate here,
 533                          *and N rate will all be controled by FW
 534                          *when tcb_desc->use_driver_rate = false
 535                          */
 536                         if (rtlmac->ht_enable) {
 537                                 tcb_desc->hw_rate = _rtl_get_highest_n_rate(hw);
 538                         } else {
 539                                 if (rtlmac->mode == WIRELESS_MODE_B) {
 540                                         tcb_desc->hw_rate =
 541                                            rtlpriv->cfg->maps[RTL_RC_CCK_RATE11M];
 542                                 } else {
 543                                         tcb_desc->hw_rate =
 544                                            rtlpriv->cfg->maps[RTL_RC_OFDM_RATE54M];
 545                                 }
 546                         }
 547                 }
 548
 549                 if (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
 550                         tcb_desc->b_multicast = 1;
 551                 else if (is_broadcast_ether_addr(ieee80211_get_DA(hdr)))
 552                         tcb_desc->b_broadcast = 1;
 553
 554                 _rtl_txrate_selectmode(hw, tcb_desc);
 555                 _rtl_query_bandwidth_mode(hw, tcb_desc);
 556                 _rtl_qurey_shortpreamble_mode(hw, tcb_desc, info);
 557                 _rtl_query_shortgi(hw, tcb_desc, info);
 558                 _rtl_query_protection_mode(hw, tcb_desc, info);
 559         } else {
 560                 tcb_desc->use_driver_rate = true;
 561                 tcb_desc->ratr_index = 7;
 562                 tcb_desc->disable_ratefallback = 1;
 563                 tcb_desc->mac_id = 0;
 564
 565                 tcb_desc->hw_rate = rtlpriv->cfg->maps[RTL_RC_CCK_RATE1M];
 566         }
 567 }
 568 EXPORT_SYMBOL(rtl_get_tcb_desc);
 569
 570 bool rtl_tx_mgmt_proc(struct ieee80211_hw *hw, struct sk_buff *skb)
 571 {
 572         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 573         struct rtl_priv *rtlpriv = rtl_priv(hw);
 574         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 575         u16 fc = le16_to_cpu(hdr->frame_control);
 576
 577         if (ieee80211_is_auth(fc)) {
 578                 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, ("MAC80211_LINKING\n"));
 579                 rtl_ips_nic_on(hw);
 580
 581                 mac->link_state = MAC80211_LINKING;
 582         }
 583
 584         return true;
 585 }
 586
 587 bool rtl_action_proc(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 588 {
 589         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 590         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 591         struct rtl_priv *rtlpriv = rtl_priv(hw);
 592         u16 fc = le16_to_cpu(hdr->frame_control);
 593         u8 *act = (u8 *) (((u8 *) skb->data + MAC80211_3ADDR_LEN));
 594         u8 category;
 595
 596         if (!ieee80211_is_action(fc))
 597                 return true;
 598
 599         category = *act;
 600         act++;
 601         switch (category) {
 602         case ACT_CAT_BA:
 603                 switch (*act) {
 604                 case ACT_ADDBAREQ:
 605                         if (mac->act_scanning)
 606                                 return false;
 607
 608                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 609                                  ("%s ACT_ADDBAREQ From :" MAC_FMT "\n",
 610                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 611                         break;
 612                 case ACT_ADDBARSP:
 613                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 614                                  ("%s ACT_ADDBARSP From :" MAC_FMT "\n",
 615                                   is_tx ? "Tx" : "Rx", MAC_ARG(hdr->addr2)));
 616                         break;
 617                 case ACT_DELBA:
 618                         RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 619                                  ("ACT_ADDBADEL From :" MAC_FMT "\n",
 620                                   MAC_ARG(hdr->addr2)));
 621                         break;
 622                 }
 623                 break;
 624         default:
 625                 break;
 626         }
 627
 628         return true;
 629 }
 630
 631 /*should call before software enc*/
 632 u8 rtl_is_special_data(struct ieee80211_hw *hw, struct sk_buff *skb, u8 is_tx)
 633 {
 634         struct rtl_priv *rtlpriv = rtl_priv(hw);
 635         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 636         struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 637         u16 fc = le16_to_cpu(hdr->frame_control);
 638         u16 ether_type;
 639         u8 mac_hdr_len = ieee80211_get_hdrlen_from_skb(skb);
 640         const struct iphdr *ip;
 641
 642         if (!ieee80211_is_data(fc))
 643                 goto end;
 644
 645         if (ieee80211_is_nullfunc(fc))
 646                 return true;
 647
 648         ip = (struct iphdr *)((u8 *) skb->data + mac_hdr_len +
 649                               SNAP_SIZE + PROTOC_TYPE_SIZE);
 650         ether_type = *(u16 *) ((u8 *) skb->data + mac_hdr_len + SNAP_SIZE);
 651         ether_type = ntohs(ether_type);
 652
 653         if (ETH_P_IP == ether_type) {
 654                 if (IPPROTO_UDP == ip->protocol) {
 655                         struct udphdr *udp = (struct udphdr *)((u8 *) ip +
 656                                                                (ip->ihl << 2));
 657                         if (((((u8 *) udp)[1] == 68) &&
 658                              (((u8 *) udp)[3] == 67)) ||
 659                             ((((u8 *) udp)[1] == 67) &&
 660                              (((u8 *) udp)[3] == 68))) {
 661                                 /*
 662                                  * 68 : UDP BOOTP client
 663                                  * 67 : UDP BOOTP server
 664                                  */
 665                                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV),
 666                                          DBG_DMESG, ("dhcp %s !!\n",
 667                                                      (is_tx) ? "Tx" : "Rx"));
 668
 669                                 if (is_tx) {
 670                                         rtl_lps_leave(hw);
 671                                         ppsc->last_delaylps_stamp_jiffies =
 672                                             jiffies;
 673                                 }
 674
 675                                 return true;
 676                         }
 677                 }
 678         } else if (ETH_P_ARP == ether_type) {
 679                 if (is_tx) {
 680                         rtl_lps_leave(hw);
 681                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 682                 }
 683
 684                 return true;
 685         } else if (ETH_P_PAE == ether_type) {
 686                 RT_TRACE(rtlpriv, (COMP_SEND | COMP_RECV), DBG_DMESG,
 687                          ("802.1X %s EAPOL pkt!!\n", (is_tx) ? "Tx" : "Rx"));
 688
 689                 if (is_tx) {
 690                         rtl_lps_leave(hw);
 691                         ppsc->last_delaylps_stamp_jiffies = jiffies;
 692                 }
 693
 694                 return true;
 695         } else if (0x86DD == ether_type) {
 696                 return true;
 697         }
 698
 699 end:
 700         return false;
 701 }
 702
 703 /*********************************************************
 704  *
 705  * functions called by core.c
 706  *
 707  *********************************************************/
 708 int rtl_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra, u16 tid, u16 *ssn)
 709 {
 710         struct rtl_priv *rtlpriv = rtl_priv(hw);
 711         struct rtl_tid_data *tid_data;
 712         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 713
 714         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 715                  ("on ra = %pM tid = %d\n", ra, tid));
 716
 717         if (unlikely(tid >= MAX_TID_COUNT))
 718                 return -EINVAL;
 719
 720         if (mac->tids[tid].agg.agg_state != RTL_AGG_OFF) {
 721                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 722                          ("Start AGG when state is not RTL_AGG_OFF !\n"));
 723                 return -ENXIO;
 724         }
 725
 726         tid_data = &mac->tids[tid];
 727         *ssn = SEQ_TO_SN(tid_data->seq_number);
 728
 729         RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG,
 730                  ("HW queue is empty tid:%d\n", tid));
 731         tid_data->agg.agg_state = RTL_AGG_ON;
 732
 733         ieee80211_start_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 734
 735         return 0;
 736 }
 737
 738 int rtl_tx_agg_stop(struct ieee80211_hw *hw, const u8 * ra, u16 tid)
 739 {
 740         int ssn = -1;
 741         struct rtl_priv *rtlpriv = rtl_priv(hw);
 742         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 743         struct rtl_tid_data *tid_data;
 744
 745         if (!ra) {
 746                 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, ("ra = NULL\n"));
 747                 return -EINVAL;
 748         }
 749
 750         if (unlikely(tid >= MAX_TID_COUNT))
 751                 return -EINVAL;
 752
 753         if (mac->tids[tid].agg.agg_state != RTL_AGG_ON)
 754                 RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
 755                          ("Stopping AGG while state not ON or starting\n"));
 756
 757         tid_data = &mac->tids[tid];
 758         ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4;
 759
 760         mac->tids[tid].agg.agg_state = RTL_AGG_OFF;
 761
 762         ieee80211_stop_tx_ba_cb_irqsafe(mac->vif, ra, tid);
 763
 764         return 0;
 765 }
 766
 767 /*********************************************************
 768  *
 769  * wq & timer callback functions
 770  *
 771  *********************************************************/
 772 void rtl_watchdog_wq_callback(void *data)
 773 {
 774         struct rtl_works *rtlworks = container_of_dwork_rtl(data,
 775                                                             struct rtl_works,
 776                                                             watchdog_wq);
 777         struct ieee80211_hw *hw = rtlworks->hw;
 778         struct rtl_priv *rtlpriv = rtl_priv(hw);
 779         struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 780         struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 781
 782         bool b_busytraffic = false;
 783         bool b_higher_busytraffic = false;
 784         bool b_higher_busyrxtraffic = false;
 785         bool b_higher_busytxtraffic = false;
 786
 787         u8 idx = 0;
 788         u32 rx_cnt_inp4eriod = 0;
 789         u32 tx_cnt_inp4eriod = 0;
 790         u32 aver_rx_cnt_inperiod = 0;
 791         u32 aver_tx_cnt_inperiod = 0;
 792
 793         bool benter_ps = false;
 794
 795         if (is_hal_stop(rtlhal))
 796                 return;
 797
 798         /* <1> Determine if action frame is allowed */
 799         if (mac->link_state > MAC80211_NOLINK) {
 800                 if (mac->cnt_after_linked < 20)
 801                         mac->cnt_after_linked++;
 802         } else {
 803                 mac->cnt_after_linked = 0;
 804         }
 805
 806         /* <2> DM */
 807         rtlpriv->cfg->ops->dm_watchdog(hw);
 808
 809         /*
 810          *<3> to check if traffic busy, if
 811          * busytraffic we don't change channel
 812          */
 813         if (mac->link_state >= MAC80211_LINKED) {
 814
 815                 /* (1) get aver_rx_cnt_inperiod & aver_tx_cnt_inperiod */
 816                 for (idx = 0; idx <= 2; idx++) {
 817                         rtlpriv->link_info.num_rx_in4period[idx] =
 818                             rtlpriv->link_info.num_rx_in4period[idx + 1];
 819                         rtlpriv->link_info.num_tx_in4period[idx] =
 820                             rtlpriv->link_info.num_tx_in4period[idx + 1];
 821                 }
 822                 rtlpriv->link_info.num_rx_in4period[3] =
 823                     rtlpriv->link_info.num_rx_inperiod;
 824                 rtlpriv->link_info.num_tx_in4period[3] =
 825                     rtlpriv->link_info.num_tx_inperiod;
 826                 for (idx = 0; idx <= 3; idx++) {
 827                         rx_cnt_inp4eriod +=
 828                             rtlpriv->link_info.num_rx_in4period[idx];
 829                         tx_cnt_inp4eriod +=
 830                             rtlpriv->link_info.num_tx_in4period[idx];
 831                 }
 832                 aver_rx_cnt_inperiod = rx_cnt_inp4eriod / 4;
 833                 aver_tx_cnt_inperiod = tx_cnt_inp4eriod / 4;
 834
 835                 /* (2) check traffic busy */
 836                 if (aver_rx_cnt_inperiod > 100 || aver_tx_cnt_inperiod > 100)
 837                         b_busytraffic = true;
 838
 839                 /* Higher Tx/Rx data. */
 840                 if (aver_rx_cnt_inperiod > 4000 ||
 841                     aver_tx_cnt_inperiod > 4000) {
 842                         b_higher_busytraffic = true;
 843
 844                         /* Extremely high Rx data. */
 845                         if (aver_rx_cnt_inperiod > 5000)
 846                                 b_higher_busyrxtraffic = true;
 847                         else
 848                                 b_higher_busytxtraffic = false;
 849                 }
 850
 851                 if (((rtlpriv->link_info.num_rx_inperiod +
 852                       rtlpriv->link_info.num_tx_inperiod) > 8) ||
 853                     (rtlpriv->link_info.num_rx_inperiod > 2))
 854                         benter_ps = false;
 855                 else
 856                         benter_ps = true;
 857
 858                 /* LeisurePS only work in infra mode. */
 859                 if (benter_ps)
 860                         rtl_lps_enter(hw);
 861                 else
 862                         rtl_lps_leave(hw);
 863         }
 864
 865         rtlpriv->link_info.num_rx_inperiod = 0;
 866         rtlpriv->link_info.num_tx_inperiod = 0;
 867
 868         rtlpriv->link_info.b_busytraffic = b_busytraffic;
 869         rtlpriv->link_info.b_higher_busytraffic = b_higher_busytraffic;
 870         rtlpriv->link_info.b_higher_busyrxtraffic = b_higher_busyrxtraffic;
 871
 872 }
 873
 874 void rtl_watch_dog_timer_callback(unsigned long data)
 875 {
 876         struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
 877         struct rtl_priv *rtlpriv = rtl_priv(hw);
 878
 879         queue_delayed_work(rtlpriv->works.rtl_wq,
 880                            &rtlpriv->works.watchdog_wq, 0);
 881
 882         mod_timer(&rtlpriv->works.watchdog_timer,
 883                   jiffies + MSECS(RTL_WATCH_DOG_TIME));
 884 }
 885
 886 /*********************************************************
 887  *
 888  * sysfs functions
 889  *
 890  *********************************************************/
 891 static ssize_t rtl_show_debug_level(struct device *d,
 892                                     struct device_attribute *attr, char *buf)
 893 {
 894         struct ieee80211_hw *hw = dev_get_drvdata(d);
 895         struct rtl_priv *rtlpriv = rtl_priv(hw);
 896
 897         return sprintf(buf, "0x%08X\n", rtlpriv->dbg.global_debuglevel);
 898 }
 899
 900 static ssize_t rtl_store_debug_level(struct device *d,
 901                                      struct device_attribute *attr,
 902                                      const char *buf, size_t count)
 903 {
 904         struct ieee80211_hw *hw = dev_get_drvdata(d);
 905         struct rtl_priv *rtlpriv = rtl_priv(hw);
 906         unsigned long val;
 907         int ret;
 908
 909         ret = strict_strtoul(buf, 0, &val);
 910         if (ret) {
 911                 printk(KERN_DEBUG "%s is not in hex or decimal form.\n", buf);
 912         } else {
 913                 rtlpriv->dbg.global_debuglevel = val;
 914                 printk(KERN_DEBUG "debuglevel:%x\n",
 915                        rtlpriv->dbg.global_debuglevel);
 916         }
 917
 918         return strnlen(buf, count);
 919 }
 920
 921 static DEVICE_ATTR(debug_level, S_IWUSR | S_IRUGO,
 922                    rtl_show_debug_level, rtl_store_debug_level);
 923
 924 static struct attribute *rtl_sysfs_entries[] = {
 925
 926         &dev_attr_debug_level.attr,
 927
 928         NULL
 929 };
 930
 931 /*
 932  * "name" is folder name witch will be
 933  * put in device directory like :
 934  * sys/devices/pci0000:00/0000:00:1c.4/
 935  * 0000:06:00.0/rtl_sysfs
 936  */
 937 struct attribute_group rtl_attribute_group = {
 938         .name = "rtlsysfs",
 939         .attrs = rtl_sysfs_entries,
 940 };
 941
 942 MODULE_AUTHOR("lizhaoming       <chaoming_li@realsil.com.cn>");
 943 MODULE_AUTHOR("Realtek WlanFAE  <wlanfae@realtek.com>");
 944 MODULE_AUTHOR("Larry Finger     <Larry.FInger@lwfinger.net>");
 945 MODULE_LICENSE("GPL");
 946 MODULE_DESCRIPTION("Realtek 802.11n PCI wireless core");
 947
 948 static int __init rtl_core_module_init(void)
 949 {
 950         return 0;
 951 }
 952
 953 static void __exit rtl_core_module_exit(void)
 954 {
 955 }
 956
 957 module_init(rtl_core_module_init);
 958 module_exit(rtl_core_module_exit);