drivers/staging/vt6656/rxtx.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * File: rxtx.c
  20  *
  21  * Purpose: handle WMAC/802.3/802.11 rx & tx functions
  22  *
  23  * Author: Lyndon Chen
  24  *
  25  * Date: May 20, 2003
  26  *
  27  * Functions:
  28  *      vnt_generate_tx_parameter - Generate tx dma required parameter.
  29  *      vnt_get_duration_le - get tx data required duration
  30  *      vnt_get_rtscts_duration_le- get rtx/cts required duration
  31  *      vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
  32  *      vnt_get_rsvtime- get frame reserved time
  33  *      vnt_fill_cts_head- fulfill CTS ctl header
  34  *
  35  * Revision History:
  36  *
  37  */
  38
  39 #include "device.h"
  40 #include "rxtx.h"
  41 #include "card.h"
  42 #include "mac.h"
  43 #include "rf.h"
  44 #include "usbpipe.h"
  45
  46 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
  47         {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */
  48         {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */
  49 };
  50
  51 static const u16 vnt_fb_opt0[2][5] = {
  52         {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
  53         {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
  54 };
  55
  56 static const u16 vnt_fb_opt1[2][5] = {
  57         {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
  58         {RATE_6M , RATE_6M,  RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
  59 };
  60
  61 #define RTSDUR_BB       0
  62 #define RTSDUR_BA       1
  63 #define RTSDUR_AA       2
  64 #define CTSDUR_BA       3
  65 #define RTSDUR_BA_F0    4
  66 #define RTSDUR_AA_F0    5
  67 #define RTSDUR_BA_F1    6
  68 #define RTSDUR_AA_F1    7
  69 #define CTSDUR_BA_F0    8
  70 #define CTSDUR_BA_F1    9
  71 #define DATADUR_B       10
  72 #define DATADUR_A       11
  73 #define DATADUR_A_F0    12
  74 #define DATADUR_A_F1    13
  75
  76 static struct vnt_usb_send_context
  77         *vnt_get_free_context(struct vnt_private *priv)
  78 {
  79         struct vnt_usb_send_context *context = NULL;
  80         int ii;
  81
  82         dev_dbg(&priv->usb->dev, "%s\n", __func__);
  83
  84         for (ii = 0; ii < priv->num_tx_context; ii++) {
  85                 if (!priv->tx_context[ii])
  86                         return NULL;
  87
  88                 context = priv->tx_context[ii];
  89                 if (context->in_use == false) {
  90                         context->in_use = true;
  91                         memset(context->data, 0,
  92                                         MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
  93
  94                         context->hdr = NULL;
  95
  96                         return context;
  97                 }
  98         }
  99
 100         if (ii == priv->num_tx_context)
 101                 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
 102
 103         return NULL;
 104 }
 105
 106 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
 107 {
 108         return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
 109                                                         [rate % MAX_RATE]);
 110 }
 111
 112 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
 113         u32 frame_length, u16 rate, int need_ack)
 114 {
 115         u32 data_time, ack_time;
 116
 117         data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 118                                                         frame_length, rate);
 119
 120         if (pkt_type == PK_TYPE_11B)
 121                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 122                                         14, (u16)priv->top_cck_basic_rate);
 123         else
 124                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 125                                         14, (u16)priv->top_ofdm_basic_rate);
 126
 127         if (need_ack)
 128                 return data_time + priv->sifs + ack_time;
 129
 130         return data_time;
 131 }
 132
 133 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
 134         u32 frame_length, u16 rate, int need_ack)
 135 {
 136         return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
 137                 frame_length, rate, need_ack));
 138 }
 139
 140 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
 141         u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
 142 {
 143         u32 rrv_time, rts_time, cts_time, ack_time, data_time;
 144
 145         rrv_time = rts_time = cts_time = ack_time = data_time = 0;
 146
 147         data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 148                                                 frame_length, current_rate);
 149
 150         if (rsv_type == 0) {
 151                 rts_time = vnt_get_frame_time(priv->preamble_type,
 152                         pkt_type, 20, priv->top_cck_basic_rate);
 153                 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
 154                         pkt_type, 14, priv->top_cck_basic_rate);
 155         } else if (rsv_type == 1) {
 156                 rts_time = vnt_get_frame_time(priv->preamble_type,
 157                         pkt_type, 20, priv->top_cck_basic_rate);
 158                 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 159                         14, priv->top_cck_basic_rate);
 160                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 161                         14, priv->top_ofdm_basic_rate);
 162         } else if (rsv_type == 2) {
 163                 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 164                         20, priv->top_ofdm_basic_rate);
 165                 cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
 166                         pkt_type, 14, priv->top_ofdm_basic_rate);
 167         } else if (rsv_type == 3) {
 168                 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 169                         14, priv->top_cck_basic_rate);
 170                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 171                         14, priv->top_ofdm_basic_rate);
 172
 173                 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
 174
 175                 return cpu_to_le16((u16)rrv_time);
 176         }
 177
 178         rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
 179
 180         return cpu_to_le16((u16)rrv_time);
 181 }
 182
 183 static __le16 vnt_get_duration_le(struct vnt_private *priv,
 184                                         u8 pkt_type, int need_ack)
 185 {
 186         u32 ack_time = 0;
 187
 188         if (need_ack) {
 189                 if (pkt_type == PK_TYPE_11B)
 190                         ack_time = vnt_get_frame_time(priv->preamble_type,
 191                                 pkt_type, 14, priv->top_cck_basic_rate);
 192                 else
 193                         ack_time = vnt_get_frame_time(priv->preamble_type,
 194                                 pkt_type, 14, priv->top_ofdm_basic_rate);
 195
 196                 return cpu_to_le16((u16)(priv->sifs + ack_time));
 197         }
 198
 199         return 0;
 200 }
 201
 202 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
 203                                          u8 dur_type, u8 pkt_type, u16 rate)
 204 {
 205         struct vnt_private *priv = context->priv;
 206         u32 cts_time = 0, dur_time = 0;
 207         u32 frame_length = context->frame_len;
 208         u8 need_ack = context->need_ack;
 209
 210         switch (dur_type) {
 211         case RTSDUR_BB:
 212         case RTSDUR_BA:
 213         case RTSDUR_BA_F0:
 214         case RTSDUR_BA_F1:
 215                 cts_time = vnt_get_frame_time(priv->preamble_type,
 216                                 pkt_type, 14, priv->top_cck_basic_rate);
 217                 dur_time = cts_time + 2 * priv->sifs +
 218                         vnt_get_rsvtime(priv, pkt_type,
 219                                                 frame_length, rate, need_ack);
 220                 break;
 221
 222         case RTSDUR_AA:
 223         case RTSDUR_AA_F0:
 224         case RTSDUR_AA_F1:
 225                 cts_time = vnt_get_frame_time(priv->preamble_type,
 226                                 pkt_type, 14, priv->top_ofdm_basic_rate);
 227                 dur_time = cts_time + 2 * priv->sifs +
 228                         vnt_get_rsvtime(priv, pkt_type,
 229                                                 frame_length, rate, need_ack);
 230                 break;
 231
 232         case CTSDUR_BA:
 233         case CTSDUR_BA_F0:
 234         case CTSDUR_BA_F1:
 235                 dur_time = priv->sifs + vnt_get_rsvtime(priv,
 236                                 pkt_type, frame_length, rate, need_ack);
 237                 break;
 238
 239         default:
 240                 break;
 241         }
 242
 243         return cpu_to_le16((u16)dur_time);
 244 }
 245
 246 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
 247         struct ieee80211_hdr *hdr)
 248 {
 249         u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
 250         u8 *hdr_pos = (u8 *)hdr;
 251
 252         tx_context->hdr = hdr;
 253         if (!tx_context->hdr)
 254                 return 0;
 255
 256         return (u16)(hdr_pos - head);
 257 }
 258
 259 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
 260                                struct vnt_tx_datahead_g *buf)
 261 {
 262
 263         struct vnt_private *priv = tx_context->priv;
 264         struct ieee80211_hdr *hdr =
 265                                 (struct ieee80211_hdr *)tx_context->skb->data;
 266         u32 frame_len = tx_context->frame_len;
 267         u16 rate = tx_context->tx_rate;
 268         u8 need_ack = tx_context->need_ack;
 269
 270         /* Get SignalField,ServiceField,Length */
 271         vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
 272         vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
 273                                                         PK_TYPE_11B, &buf->b);
 274
 275         /* Get Duration and TimeStamp */
 276         if (ieee80211_is_pspoll(hdr->frame_control)) {
 277                 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
 278
 279                 buf->duration_a = dur;
 280                 buf->duration_b = dur;
 281         } else {
 282                 buf->duration_a = vnt_get_duration_le(priv,
 283                                                 tx_context->pkt_type, need_ack);
 284                 buf->duration_b = vnt_get_duration_le(priv,
 285                                                         PK_TYPE_11B, need_ack);
 286         }
 287
 288         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 289         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 290                                         priv->top_cck_basic_rate);
 291
 292         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 293
 294         return le16_to_cpu(buf->duration_a);
 295 }
 296
 297 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
 298                                   struct vnt_tx_datahead_g_fb *buf)
 299 {
 300         struct vnt_private *priv = tx_context->priv;
 301         u32 frame_len = tx_context->frame_len;
 302         u16 rate = tx_context->tx_rate;
 303         u8 need_ack = tx_context->need_ack;
 304
 305         /* Get SignalField,ServiceField,Length */
 306         vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
 307
 308         vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
 309                                                 PK_TYPE_11B, &buf->b);
 310
 311         /* Get Duration and TimeStamp */
 312         buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
 313                                               need_ack);
 314         buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
 315
 316         buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
 317                                                  need_ack);
 318         buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
 319                                                  need_ack);
 320
 321         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 322         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 323                                                 priv->top_cck_basic_rate);
 324
 325         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 326
 327         return le16_to_cpu(buf->duration_a);
 328 }
 329
 330 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
 331                                   struct vnt_tx_datahead_a_fb *buf)
 332 {
 333         struct vnt_private *priv = tx_context->priv;
 334         u16 rate = tx_context->tx_rate;
 335         u8 pkt_type = tx_context->pkt_type;
 336         u8 need_ack = tx_context->need_ack;
 337         u32 frame_len = tx_context->frame_len;
 338
 339         /* Get SignalField,ServiceField,Length */
 340         vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
 341         /* Get Duration and TimeStampOff */
 342         buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
 343
 344         buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
 345         buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
 346
 347         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 348
 349         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 350
 351         return le16_to_cpu(buf->duration);
 352 }
 353
 354 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
 355                                 struct vnt_tx_datahead_ab *buf)
 356 {
 357         struct vnt_private *priv = tx_context->priv;
 358         struct ieee80211_hdr *hdr =
 359                                 (struct ieee80211_hdr *)tx_context->skb->data;
 360         u32 frame_len = tx_context->frame_len;
 361         u16 rate = tx_context->tx_rate;
 362         u8 need_ack = tx_context->need_ack;
 363
 364         /* Get SignalField,ServiceField,Length */
 365         vnt_get_phy_field(priv, frame_len, rate,
 366                           tx_context->pkt_type, &buf->ab);
 367
 368         /* Get Duration and TimeStampOff */
 369         if (ieee80211_is_pspoll(hdr->frame_control)) {
 370                 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
 371
 372                 buf->duration = dur;
 373         } else {
 374                 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
 375                                                     need_ack);
 376         }
 377
 378         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 379
 380         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 381
 382         return le16_to_cpu(buf->duration);
 383 }
 384
 385 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
 386         struct ieee80211_rts *rts, __le16 duration)
 387 {
 388         struct ieee80211_hdr *hdr =
 389                                 (struct ieee80211_hdr *)tx_context->skb->data;
 390
 391         rts->duration = duration;
 392         rts->frame_control =
 393                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 394
 395         memcpy(rts->ra, hdr->addr1, ETH_ALEN);
 396         memcpy(rts->ta, hdr->addr2, ETH_ALEN);
 397
 398         return 0;
 399 }
 400
 401 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
 402                                struct vnt_rts_g *buf)
 403 {
 404         struct vnt_private *priv = tx_context->priv;
 405         u16 rts_frame_len = 20;
 406         u16 current_rate = tx_context->tx_rate;
 407
 408         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 409                 PK_TYPE_11B, &buf->b);
 410         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 411                           tx_context->pkt_type, &buf->a);
 412
 413         buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
 414                                                       PK_TYPE_11B,
 415                                                       priv->top_cck_basic_rate);
 416         buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 417                                                       tx_context->pkt_type,
 418                                                       current_rate);
 419         buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
 420                                                       tx_context->pkt_type,
 421                                                       current_rate);
 422
 423         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 424
 425         return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 426 }
 427
 428 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
 429                                   struct vnt_rts_g_fb *buf)
 430 {
 431         struct vnt_private *priv = tx_context->priv;
 432         u16 current_rate = tx_context->tx_rate;
 433         u16 rts_frame_len = 20;
 434
 435         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 436                 PK_TYPE_11B, &buf->b);
 437         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 438                           tx_context->pkt_type, &buf->a);
 439
 440         buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
 441                                                       PK_TYPE_11B,
 442                                                       priv->top_cck_basic_rate);
 443         buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 444                                                       tx_context->pkt_type,
 445                                                       current_rate);
 446         buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
 447                                                       tx_context->pkt_type,
 448                                                       current_rate);
 449
 450         buf->rts_duration_ba_f0 =
 451                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
 452                                            tx_context->pkt_type,
 453                                            priv->tx_rate_fb0);
 454         buf->rts_duration_aa_f0 =
 455                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
 456                                            tx_context->pkt_type,
 457                                            priv->tx_rate_fb0);
 458         buf->rts_duration_ba_f1 =
 459                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
 460                                            tx_context->pkt_type,
 461                                            priv->tx_rate_fb1);
 462         buf->rts_duration_aa_f1 =
 463                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
 464                                            tx_context->pkt_type,
 465                                            priv->tx_rate_fb1);
 466
 467         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 468
 469         return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
 470 }
 471
 472 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
 473                                 struct vnt_rts_ab *buf)
 474 {
 475         struct vnt_private *priv = tx_context->priv;
 476         u16 current_rate = tx_context->tx_rate;
 477         u16 rts_frame_len = 20;
 478
 479         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 480                           tx_context->pkt_type, &buf->ab);
 481
 482         buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 483                                                    tx_context->pkt_type,
 484                                                    current_rate);
 485
 486         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 487
 488         return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
 489 }
 490
 491 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
 492                                   struct vnt_rts_a_fb *buf)
 493 {
 494         struct vnt_private *priv = tx_context->priv;
 495         u16 current_rate = tx_context->tx_rate;
 496         u16 rts_frame_len = 20;
 497
 498         vnt_get_phy_field(priv, rts_frame_len,
 499                 priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
 500
 501         buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 502                                                    tx_context->pkt_type,
 503                                                    current_rate);
 504
 505         buf->rts_duration_f0 =
 506                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
 507                                            tx_context->pkt_type,
 508                                            priv->tx_rate_fb0);
 509
 510         buf->rts_duration_f1 =
 511                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
 512                                            tx_context->pkt_type,
 513                                            priv->tx_rate_fb1);
 514
 515         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 516
 517         return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
 518 }
 519
 520 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
 521         union vnt_tx_data_head *head)
 522 {
 523         struct vnt_private *priv = tx_context->priv;
 524         u32 cts_frame_len = 14;
 525         u16 current_rate = tx_context->tx_rate;
 526
 527         if (!head)
 528                 return 0;
 529
 530         if (tx_context->fb_option) {
 531                 /* Auto Fall back */
 532                 struct vnt_cts_fb *buf = &head->cts_g_fb;
 533                 /* Get SignalField,ServiceField,Length */
 534                 vnt_get_phy_field(priv, cts_frame_len,
 535                         priv->top_cck_basic_rate, PK_TYPE_11B, &buf->b);
 536                 buf->duration_ba =
 537                         vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
 538                                                    tx_context->pkt_type,
 539                                                    current_rate);
 540                 /* Get CTSDuration_ba_f0 */
 541                 buf->cts_duration_ba_f0 =
 542                         vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
 543                                                    tx_context->pkt_type,
 544                                                    priv->tx_rate_fb0);
 545                 /* Get CTSDuration_ba_f1 */
 546                 buf->cts_duration_ba_f1 =
 547                         vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
 548                                                    tx_context->pkt_type,
 549                                                    priv->tx_rate_fb1);
 550                 /* Get CTS Frame body */
 551                 buf->data.duration = buf->duration_ba;
 552                 buf->data.frame_control =
 553                         cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 554
 555                 memcpy(buf->data.ra, priv->current_net_addr, ETH_ALEN);
 556
 557                 return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
 558         } else {
 559                 struct vnt_cts *buf = &head->cts_g;
 560                 /* Get SignalField,ServiceField,Length */
 561                 vnt_get_phy_field(priv, cts_frame_len,
 562                         priv->top_cck_basic_rate, PK_TYPE_11B, &buf->b);
 563                 /* Get CTSDuration_ba */
 564                 buf->duration_ba =
 565                         vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
 566                                                    tx_context->pkt_type,
 567                                                    current_rate);
 568                 /*Get CTS Frame body*/
 569                 buf->data.duration = buf->duration_ba;
 570                 buf->data.frame_control =
 571                         cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 572
 573                 memcpy(buf->data.ra, priv->current_net_addr, ETH_ALEN);
 574
 575                 return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 576         }
 577
 578         return 0;
 579 }
 580
 581 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
 582                         union vnt_tx_head *tx_head, bool need_mic)
 583 {
 584         struct vnt_private *priv = tx_context->priv;
 585         struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
 586         union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
 587         u32 frame_len = tx_context->frame_len;
 588         u16 current_rate = tx_context->tx_rate;
 589         u8 need_ack = tx_context->need_ack;
 590
 591         buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
 592                         tx_context->pkt_type, frame_len, current_rate);
 593         buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
 594                         tx_context->pkt_type, frame_len, current_rate);
 595         buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
 596                         tx_context->pkt_type, frame_len, current_rate);
 597
 598         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 599                                                 frame_len, current_rate,
 600                                                 need_ack);
 601         buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
 602                                         priv->top_cck_basic_rate, need_ack);
 603
 604         if (need_mic)
 605                 head = &tx_head->tx_rts.tx.mic.head;
 606
 607         if (tx_context->fb_option)
 608                 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
 609
 610         return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
 611 }
 612
 613 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
 614                         union vnt_tx_head *tx_head, bool need_mic)
 615 {
 616         struct vnt_private *priv = tx_context->priv;
 617         struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
 618         union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
 619         u32 frame_len = tx_context->frame_len;
 620         u16 current_rate = tx_context->tx_rate;
 621         u8 need_ack = tx_context->need_ack;
 622
 623         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 624                                         frame_len, current_rate, need_ack);
 625         buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
 626                                 frame_len, priv->top_cck_basic_rate, need_ack);
 627
 628         buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
 629                         tx_context->pkt_type, frame_len, current_rate);
 630
 631         if (need_mic)
 632                 head = &tx_head->tx_cts.tx.mic.head;
 633
 634         /* Fill CTS */
 635         return vnt_fill_cts_head(tx_context, head);
 636 }
 637
 638 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
 639                        union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
 640 {
 641         struct vnt_private *priv = tx_context->priv;
 642         struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
 643         union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
 644         u32 frame_len = tx_context->frame_len;
 645         u16 current_rate = tx_context->tx_rate;
 646         u8 need_ack = tx_context->need_ack;
 647
 648         buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 649                         frame_len, current_rate, need_ack);
 650
 651         if (need_mic)
 652                 head = &tx_head->tx_ab.tx.mic.head;
 653
 654         if (need_rts) {
 655                 if (tx_context->pkt_type == PK_TYPE_11B)
 656                         buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
 657                                 tx_context->pkt_type, frame_len, current_rate);
 658                 else /* PK_TYPE_11A */
 659                         buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
 660                                 tx_context->pkt_type, frame_len, current_rate);
 661
 662                 if (tx_context->fb_option &&
 663                     tx_context->pkt_type == PK_TYPE_11A)
 664                         return vnt_rxtx_rts_a_fb_head(tx_context,
 665                                                       &head->rts_a_fb);
 666
 667                 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
 668         }
 669
 670         if (tx_context->pkt_type == PK_TYPE_11A)
 671                 return vnt_rxtx_datahead_a_fb(tx_context,
 672                                               &head->data_head_a_fb);
 673
 674         return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
 675 }
 676
 677 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
 678         struct vnt_tx_buffer *tx_buffer,
 679         struct vnt_mic_hdr **mic_hdr, u32 need_mic,
 680         bool need_rts)
 681 {
 682
 683         if (tx_context->pkt_type == PK_TYPE_11GB ||
 684             tx_context->pkt_type == PK_TYPE_11GA) {
 685                 if (need_rts) {
 686                         if (need_mic)
 687                                 *mic_hdr = &tx_buffer->
 688                                                 tx_head.tx_rts.tx.mic.hdr;
 689
 690                         return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
 691                                             need_mic);
 692                 }
 693
 694                 if (need_mic)
 695                         *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
 696
 697                 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
 698         }
 699
 700         if (need_mic)
 701                 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
 702
 703         return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
 704 }
 705
 706 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
 707         u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
 708         u16 payload_len, struct vnt_mic_hdr *mic_hdr)
 709 {
 710         struct ieee80211_hdr *hdr = tx_context->hdr;
 711         struct ieee80211_key_seq seq;
 712         u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
 713
 714         /* strip header and icv len from payload */
 715         payload_len -= ieee80211_get_hdrlen_from_skb(skb);
 716         payload_len -= tx_key->icv_len;
 717
 718         switch (tx_key->cipher) {
 719         case WLAN_CIPHER_SUITE_WEP40:
 720         case WLAN_CIPHER_SUITE_WEP104:
 721                 memcpy(key_buffer, iv, 3);
 722                 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
 723
 724                 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
 725                         memcpy(key_buffer + 8, iv, 3);
 726                         memcpy(key_buffer + 11,
 727                                         tx_key->key, WLAN_KEY_LEN_WEP40);
 728                 }
 729
 730                 break;
 731         case WLAN_CIPHER_SUITE_TKIP:
 732                 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
 733
 734                 break;
 735         case WLAN_CIPHER_SUITE_CCMP:
 736
 737                 if (!mic_hdr)
 738                         return;
 739
 740                 mic_hdr->id = 0x59;
 741                 mic_hdr->payload_len = cpu_to_be16(payload_len);
 742                 memcpy(mic_hdr->mic_addr2, hdr->addr2, ETH_ALEN);
 743
 744                 ieee80211_get_key_tx_seq(tx_key, &seq);
 745
 746                 memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
 747
 748                 if (ieee80211_has_a4(hdr->frame_control))
 749                         mic_hdr->hlen = cpu_to_be16(28);
 750                 else
 751                         mic_hdr->hlen = cpu_to_be16(22);
 752
 753                 memcpy(mic_hdr->addr1, hdr->addr1, ETH_ALEN);
 754                 memcpy(mic_hdr->addr2, hdr->addr2, ETH_ALEN);
 755                 memcpy(mic_hdr->addr3, hdr->addr3, ETH_ALEN);
 756
 757                 mic_hdr->frame_control = cpu_to_le16(
 758                         le16_to_cpu(hdr->frame_control) & 0xc78f);
 759                 mic_hdr->seq_ctrl = cpu_to_le16(
 760                                 le16_to_cpu(hdr->seq_ctrl) & 0xf);
 761
 762                 if (ieee80211_has_a4(hdr->frame_control))
 763                         memcpy(mic_hdr->addr4, hdr->addr4, ETH_ALEN);
 764
 765
 766                 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
 767
 768                 break;
 769         default:
 770                 break;
 771         }
 772
 773 }
 774
 775 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
 776 {
 777         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 778         struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
 779         struct ieee80211_rate *rate;
 780         struct ieee80211_key_conf *tx_key;
 781         struct ieee80211_hdr *hdr;
 782         struct vnt_mic_hdr *mic_hdr = NULL;
 783         struct vnt_tx_buffer *tx_buffer;
 784         struct vnt_tx_fifo_head *tx_buffer_head;
 785         struct vnt_usb_send_context *tx_context;
 786         unsigned long flags;
 787         u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
 788         u8 pkt_type, fb_option = AUTO_FB_NONE;
 789         bool need_rts = false, is_pspoll = false;
 790         bool need_mic = false;
 791
 792         hdr = (struct ieee80211_hdr *)(skb->data);
 793
 794         rate = ieee80211_get_tx_rate(priv->hw, info);
 795
 796         current_rate = rate->hw_value;
 797         if (priv->current_rate != current_rate &&
 798                         !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
 799                 priv->current_rate = current_rate;
 800                 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
 801         }
 802
 803         if (current_rate > RATE_11M)
 804                 pkt_type = priv->packet_type;
 805         else
 806                 pkt_type = PK_TYPE_11B;
 807
 808         spin_lock_irqsave(&priv->lock, flags);
 809
 810         tx_context = vnt_get_free_context(priv);
 811         if (!tx_context) {
 812                 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
 813                 spin_unlock_irqrestore(&priv->lock, flags);
 814                 return -ENOMEM;
 815         }
 816
 817         tx_context->skb = skb;
 818         tx_context->pkt_type = pkt_type;
 819         tx_context->need_ack = false;
 820         tx_context->frame_len = skb->len + 4;
 821         tx_context->tx_rate = current_rate;
 822
 823         spin_unlock_irqrestore(&priv->lock, flags);
 824
 825         tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
 826         tx_buffer_head = &tx_buffer->fifo_head;
 827         tx_body_size = skb->len;
 828
 829         /*Set fifo controls */
 830         if (pkt_type == PK_TYPE_11A)
 831                 tx_buffer_head->fifo_ctl = 0;
 832         else if (pkt_type == PK_TYPE_11B)
 833                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
 834         else if (pkt_type == PK_TYPE_11GB)
 835                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
 836         else if (pkt_type == PK_TYPE_11GA)
 837                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
 838
 839         if (!ieee80211_is_data(hdr->frame_control)) {
 840                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
 841                                                         FIFOCTL_ISDMA0);
 842                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
 843
 844                 tx_buffer_head->time_stamp =
 845                         cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
 846         } else {
 847                 tx_buffer_head->time_stamp =
 848                         cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
 849         }
 850
 851         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 852                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
 853                 tx_context->need_ack = true;
 854         }
 855
 856         if (ieee80211_has_retry(hdr->frame_control))
 857                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
 858
 859         if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 860                 priv->preamble_type = PREAMBLE_SHORT;
 861         else
 862                 priv->preamble_type = PREAMBLE_LONG;
 863
 864         if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 865                 need_rts = true;
 866                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
 867         }
 868
 869         if (ieee80211_has_a4(hdr->frame_control))
 870                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
 871
 872         if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
 873                 is_pspoll = true;
 874
 875         tx_buffer_head->frag_ctl =
 876                         cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
 877
 878         if (info->control.hw_key) {
 879                 tx_key = info->control.hw_key;
 880                 switch (info->control.hw_key->cipher) {
 881                 case WLAN_CIPHER_SUITE_WEP40:
 882                 case WLAN_CIPHER_SUITE_WEP104:
 883                         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
 884                         break;
 885                 case WLAN_CIPHER_SUITE_TKIP:
 886                         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
 887                         break;
 888                 case WLAN_CIPHER_SUITE_CCMP:
 889                         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
 890                         need_mic = true;
 891                 default:
 892                         break;
 893                 }
 894                 tx_context->frame_len += tx_key->icv_len;
 895         }
 896
 897         tx_buffer_head->current_rate = cpu_to_le16(current_rate);
 898
 899         /* legacy rates TODO use ieee80211_tx_rate */
 900         if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
 901                 if (priv->auto_fb_ctrl == AUTO_FB_0) {
 902                         tx_buffer_head->fifo_ctl |=
 903                                                 cpu_to_le16(FIFOCTL_AUTO_FB_0);
 904
 905                         priv->tx_rate_fb0 =
 906                                 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
 907                         priv->tx_rate_fb1 =
 908                                 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
 909
 910                         fb_option = AUTO_FB_0;
 911                 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
 912                         tx_buffer_head->fifo_ctl |=
 913                                                 cpu_to_le16(FIFOCTL_AUTO_FB_1);
 914
 915                         priv->tx_rate_fb0 =
 916                                 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
 917                         priv->tx_rate_fb1 =
 918                                 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
 919
 920                         fb_option = AUTO_FB_1;
 921                 }
 922         }
 923
 924         tx_context->fb_option = fb_option;
 925
 926         duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
 927                                                 need_mic, need_rts);
 928
 929         tx_header_size = tx_context->tx_hdr_size;
 930         if (!tx_header_size) {
 931                 tx_context->in_use = false;
 932                 return -ENOMEM;
 933         }
 934
 935         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
 936
 937         tx_bytes = tx_header_size + tx_body_size;
 938
 939         memcpy(tx_context->hdr, skb->data, tx_body_size);
 940
 941         hdr->duration_id = cpu_to_le16(duration_id);
 942
 943         if (info->control.hw_key) {
 944                 tx_key = info->control.hw_key;
 945                 if (tx_key->keylen > 0)
 946                         vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
 947                                 tx_key, skb, tx_body_size, mic_hdr);
 948         }
 949
 950         priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
 951                                                 IEEE80211_SCTL_SEQ) >> 4;
 952
 953         tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
 954         tx_buffer->pkt_no = tx_context->pkt_no;
 955         tx_buffer->type = 0x00;
 956
 957         tx_bytes += 4;
 958
 959         tx_context->type = CONTEXT_DATA_PACKET;
 960         tx_context->buf_len = tx_bytes;
 961
 962         spin_lock_irqsave(&priv->lock, flags);
 963
 964         if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
 965                 spin_unlock_irqrestore(&priv->lock, flags);
 966                 return -EIO;
 967         }
 968
 969         spin_unlock_irqrestore(&priv->lock, flags);
 970
 971         return 0;
 972 }
 973
 974 static int vnt_beacon_xmit(struct vnt_private *priv,
 975         struct sk_buff *skb)
 976 {
 977         struct vnt_beacon_buffer *beacon_buffer;
 978         struct vnt_tx_short_buf_head *short_head;
 979         struct ieee80211_tx_info *info;
 980         struct vnt_usb_send_context *context;
 981         struct ieee80211_mgmt *mgmt_hdr;
 982         unsigned long flags;
 983         u32 frame_size = skb->len + 4;
 984         u16 current_rate, count;
 985
 986         spin_lock_irqsave(&priv->lock, flags);
 987
 988         context = vnt_get_free_context(priv);
 989         if (!context) {
 990                 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
 991                 spin_unlock_irqrestore(&priv->lock, flags);
 992                 return -ENOMEM;
 993         }
 994
 995         context->skb = skb;
 996
 997         spin_unlock_irqrestore(&priv->lock, flags);
 998
 999         beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1000         short_head = &beacon_buffer->short_head;
1001
1002         if (priv->bb_type == BB_TYPE_11A) {
1003                 current_rate = RATE_6M;
1004
1005                 /* Get SignalField,ServiceField,Length */
1006                 vnt_get_phy_field(priv, frame_size, current_rate,
1007                         PK_TYPE_11A, &short_head->ab);
1008
1009                 /* Get Duration and TimeStampOff */
1010                 short_head->duration = vnt_get_duration_le(priv,
1011                                                         PK_TYPE_11A, false);
1012                 short_head->time_stamp_off =
1013                                 vnt_time_stamp_off(priv, current_rate);
1014         } else {
1015                 current_rate = RATE_1M;
1016                 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1017
1018                 /* Get SignalField,ServiceField,Length */
1019                 vnt_get_phy_field(priv, frame_size, current_rate,
1020                                         PK_TYPE_11B, &short_head->ab);
1021
1022                 /* Get Duration and TimeStampOff */
1023                 short_head->duration = vnt_get_duration_le(priv,
1024                                                 PK_TYPE_11B, false);
1025                 short_head->time_stamp_off =
1026                         vnt_time_stamp_off(priv, current_rate);
1027         }
1028
1029         /* Generate Beacon Header */
1030         mgmt_hdr = &beacon_buffer->mgmt_hdr;
1031         memcpy(mgmt_hdr, skb->data, skb->len);
1032
1033         /* time stamp always 0 */
1034         mgmt_hdr->u.beacon.timestamp = 0;
1035
1036         info = IEEE80211_SKB_CB(skb);
1037         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1038                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1039
1040                 hdr->duration_id = 0;
1041                 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1042         }
1043
1044         priv->seq_counter++;
1045         if (priv->seq_counter > 0x0fff)
1046                 priv->seq_counter = 0;
1047
1048         count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1049
1050         beacon_buffer->tx_byte_count = cpu_to_le16(count);
1051         beacon_buffer->pkt_no = context->pkt_no;
1052         beacon_buffer->type = 0x01;
1053
1054         context->type = CONTEXT_BEACON_PACKET;
1055         context->buf_len = count + 4; /* USB header */
1056
1057         spin_lock_irqsave(&priv->lock, flags);
1058
1059         if (vnt_tx_context(priv, context) != STATUS_PENDING)
1060                 ieee80211_free_txskb(priv->hw, context->skb);
1061
1062         spin_unlock_irqrestore(&priv->lock, flags);
1063
1064         return 0;
1065 }
1066
1067 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1068 {
1069         struct sk_buff *beacon;
1070
1071         beacon = ieee80211_beacon_get(priv->hw, vif);
1072         if (!beacon)
1073                 return -ENOMEM;
1074
1075         if (vnt_beacon_xmit(priv, beacon)) {
1076                 ieee80211_free_txskb(priv->hw, beacon);
1077                 return -ENODEV;
1078         }
1079
1080         return 0;
1081 }
1082
1083 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1084         struct ieee80211_bss_conf *conf)
1085 {
1086         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1087
1088         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1089
1090         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1091
1092         vnt_clear_current_tsf(priv);
1093
1094         vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1095
1096         vnt_reset_next_tbtt(priv, conf->beacon_int);
1097
1098         return vnt_beacon_make(priv, vif);
1099 }