drivers/staging/vt6656/rxtx.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   4  * All rights reserved.
   5  *
   6  * File: rxtx.c
   7  *
   8  * Purpose: handle WMAC/802.3/802.11 rx & tx functions
   9  *
  10  * Author: Lyndon Chen
  11  *
  12  * Date: May 20, 2003
  13  *
  14  * Functions:
  15  *      vnt_generate_tx_parameter - Generate tx dma required parameter.
  16  *      vnt_get_duration_le - get tx data required duration
  17  *      vnt_get_rtscts_duration_le- get rtx/cts required duration
  18  *      vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
  19  *      vnt_get_rsvtime- get frame reserved time
  20  *      vnt_fill_cts_head- fulfill CTS ctl header
  21  *
  22  * Revision History:
  23  *
  24  */
  25
  26 #include <linux/etherdevice.h>
  27 #include "device.h"
  28 #include "rxtx.h"
  29 #include "card.h"
  30 #include "mac.h"
  31 #include "rf.h"
  32 #include "usbpipe.h"
  33
  34 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
  35         /* Long Preamble */
  36         {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
  37
  38         /* Short Preamble */
  39         {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
  40 };
  41
  42 static const u16 vnt_fb_opt0[2][5] = {
  43         {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
  44         {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
  45 };
  46
  47 static const u16 vnt_fb_opt1[2][5] = {
  48         {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
  49         {RATE_6M,  RATE_6M,  RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
  50 };
  51
  52 #define RTSDUR_BB       0
  53 #define RTSDUR_BA       1
  54 #define RTSDUR_AA       2
  55 #define CTSDUR_BA       3
  56 #define RTSDUR_BA_F0    4
  57 #define RTSDUR_AA_F0    5
  58 #define RTSDUR_BA_F1    6
  59 #define RTSDUR_AA_F1    7
  60 #define CTSDUR_BA_F0    8
  61 #define CTSDUR_BA_F1    9
  62 #define DATADUR_B       10
  63 #define DATADUR_A       11
  64 #define DATADUR_A_F0    12
  65 #define DATADUR_A_F1    13
  66
  67 static struct vnt_usb_send_context
  68         *vnt_get_free_context(struct vnt_private *priv)
  69 {
  70         struct vnt_usb_send_context *context = NULL;
  71         int ii;
  72
  73         dev_dbg(&priv->usb->dev, "%s\n", __func__);
  74
  75         for (ii = 0; ii < priv->num_tx_context; ii++) {
  76                 if (!priv->tx_context[ii])
  77                         return NULL;
  78
  79                 context = priv->tx_context[ii];
  80                 if (!context->in_use) {
  81                         context->in_use = true;
  82                         memset(context->data, 0,
  83                                MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
  84
  85                         context->hdr = NULL;
  86
  87                         return context;
  88                 }
  89         }
  90
  91         if (ii == priv->num_tx_context) {
  92                 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
  93
  94                 ieee80211_stop_queues(priv->hw);
  95         }
  96
  97         return NULL;
  98 }
  99
 100 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
 101 {
 102         return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
 103                                                         [rate % MAX_RATE]);
 104 }
 105
 106 static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
 107                            u32 frame_length, u16 rate, int need_ack)
 108 {
 109         u32 data_time, ack_time;
 110
 111         data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 112                                        frame_length, rate);
 113
 114         if (pkt_type == PK_TYPE_11B)
 115                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, 14,
 116                                               (u16)priv->top_cck_basic_rate);
 117         else
 118                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, 14,
 119                                               (u16)priv->top_ofdm_basic_rate);
 120
 121         if (need_ack)
 122                 return data_time + priv->sifs + ack_time;
 123
 124         return data_time;
 125 }
 126
 127 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
 128                                     u32 frame_length, u16 rate, int need_ack)
 129 {
 130         return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
 131                 frame_length, rate, need_ack));
 132 }
 133
 134 static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, u8 rsv_type,
 135                                         u8 pkt_type, u32 frame_length,
 136                                         u16 current_rate)
 137 {
 138         u32 rrv_time, rts_time, cts_time, ack_time, data_time;
 139
 140         rrv_time = 0;
 141         rts_time = 0;
 142         cts_time = 0;
 143         ack_time = 0;
 144
 145         data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 146                                        frame_length, current_rate);
 147
 148         if (rsv_type == 0) {
 149                 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 150                                               20, priv->top_cck_basic_rate);
 151                 ack_time = vnt_get_frame_time(priv->preamble_type,
 152                                               pkt_type, 14,
 153                                               priv->top_cck_basic_rate);
 154                 cts_time = ack_time;
 155
 156         } else if (rsv_type == 1) {
 157                 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 158                                               20, priv->top_cck_basic_rate);
 159                 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 160                                               14, priv->top_cck_basic_rate);
 161                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 162                                               14, priv->top_ofdm_basic_rate);
 163         } else if (rsv_type == 2) {
 164                 rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 165                                               20, priv->top_ofdm_basic_rate);
 166                 ack_time = vnt_get_frame_time(priv->preamble_type,
 167                                               pkt_type, 14,
 168                                               priv->top_ofdm_basic_rate);
 169                 cts_time = ack_time;
 170
 171         } else if (rsv_type == 3) {
 172                 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 173                                               14, priv->top_cck_basic_rate);
 174                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 175                                               14, priv->top_ofdm_basic_rate);
 176
 177                 rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
 178
 179                 return cpu_to_le16((u16)rrv_time);
 180         }
 181
 182         rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
 183
 184         return cpu_to_le16((u16)rrv_time);
 185 }
 186
 187 static __le16 vnt_get_duration_le(struct vnt_private *priv, u8 pkt_type,
 188                                   int need_ack)
 189 {
 190         u32 ack_time = 0;
 191
 192         if (need_ack) {
 193                 if (pkt_type == PK_TYPE_11B)
 194                         ack_time = vnt_get_frame_time(priv->preamble_type,
 195                                                       pkt_type, 14,
 196                                                       priv->top_cck_basic_rate);
 197                 else
 198                         ack_time = vnt_get_frame_time(priv->preamble_type,
 199                                                       pkt_type, 14,
 200                                                       priv->top_ofdm_basic_rate);
 201
 202                 return cpu_to_le16((u16)(priv->sifs + ack_time));
 203         }
 204
 205         return 0;
 206 }
 207
 208 static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
 209                                          u8 dur_type, u8 pkt_type, u16 rate)
 210 {
 211         struct vnt_private *priv = context->priv;
 212         u32 cts_time = 0, dur_time = 0;
 213         u32 frame_length = context->frame_len;
 214         u8 need_ack = context->need_ack;
 215
 216         switch (dur_type) {
 217         case RTSDUR_BB:
 218         case RTSDUR_BA:
 219         case RTSDUR_BA_F0:
 220         case RTSDUR_BA_F1:
 221                 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 222                                               14, priv->top_cck_basic_rate);
 223                 dur_time = cts_time + 2 * priv->sifs +
 224                         vnt_get_rsvtime(priv, pkt_type,
 225                                         frame_length, rate, need_ack);
 226                 break;
 227
 228         case RTSDUR_AA:
 229         case RTSDUR_AA_F0:
 230         case RTSDUR_AA_F1:
 231                 cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 232                                               14, priv->top_ofdm_basic_rate);
 233                 dur_time = cts_time + 2 * priv->sifs +
 234                         vnt_get_rsvtime(priv, pkt_type,
 235                                         frame_length, rate, need_ack);
 236                 break;
 237
 238         case CTSDUR_BA:
 239         case CTSDUR_BA_F0:
 240         case CTSDUR_BA_F1:
 241                 dur_time = priv->sifs + vnt_get_rsvtime(priv,
 242                                 pkt_type, frame_length, rate, need_ack);
 243                 break;
 244
 245         default:
 246                 break;
 247         }
 248
 249         return cpu_to_le16((u16)dur_time);
 250 }
 251
 252 static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
 253                            struct ieee80211_hdr *hdr)
 254 {
 255         u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
 256         u8 *hdr_pos = (u8 *)hdr;
 257
 258         tx_context->hdr = hdr;
 259         if (!tx_context->hdr)
 260                 return 0;
 261
 262         return (u16)(hdr_pos - head);
 263 }
 264
 265 static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
 266                                struct vnt_tx_datahead_g *buf)
 267 {
 268         struct vnt_private *priv = tx_context->priv;
 269         struct ieee80211_hdr *hdr =
 270                                 (struct ieee80211_hdr *)tx_context->skb->data;
 271         u32 frame_len = tx_context->frame_len;
 272         u16 rate = tx_context->tx_rate;
 273         u8 need_ack = tx_context->need_ack;
 274
 275         /* Get SignalField,ServiceField,Length */
 276         vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
 277         vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
 278                           PK_TYPE_11B, &buf->b);
 279
 280         /* Get Duration and TimeStamp */
 281         if (ieee80211_is_pspoll(hdr->frame_control)) {
 282                 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
 283
 284                 buf->duration_a = dur;
 285                 buf->duration_b = dur;
 286         } else {
 287                 buf->duration_a = vnt_get_duration_le(priv,
 288                                                 tx_context->pkt_type, need_ack);
 289                 buf->duration_b = vnt_get_duration_le(priv,
 290                                                       PK_TYPE_11B, need_ack);
 291         }
 292
 293         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 294         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 295                                                    priv->top_cck_basic_rate);
 296
 297         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 298
 299         return le16_to_cpu(buf->duration_a);
 300 }
 301
 302 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
 303                                   struct vnt_tx_datahead_g_fb *buf)
 304 {
 305         struct vnt_private *priv = tx_context->priv;
 306         u32 frame_len = tx_context->frame_len;
 307         u16 rate = tx_context->tx_rate;
 308         u8 need_ack = tx_context->need_ack;
 309
 310         /* Get SignalField,ServiceField,Length */
 311         vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
 312
 313         vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
 314                           PK_TYPE_11B, &buf->b);
 315
 316         /* Get Duration and TimeStamp */
 317         buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
 318                                               need_ack);
 319         buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
 320
 321         buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
 322                                                  need_ack);
 323         buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
 324                                                  need_ack);
 325
 326         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 327         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 328                                                    priv->top_cck_basic_rate);
 329
 330         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 331
 332         return le16_to_cpu(buf->duration_a);
 333 }
 334
 335 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
 336                                   struct vnt_tx_datahead_a_fb *buf)
 337 {
 338         struct vnt_private *priv = tx_context->priv;
 339         u16 rate = tx_context->tx_rate;
 340         u8 pkt_type = tx_context->pkt_type;
 341         u8 need_ack = tx_context->need_ack;
 342         u32 frame_len = tx_context->frame_len;
 343
 344         /* Get SignalField,ServiceField,Length */
 345         vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
 346         /* Get Duration and TimeStampOff */
 347         buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
 348
 349         buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
 350         buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
 351
 352         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 353
 354         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 355
 356         return le16_to_cpu(buf->duration);
 357 }
 358
 359 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
 360                                 struct vnt_tx_datahead_ab *buf)
 361 {
 362         struct vnt_private *priv = tx_context->priv;
 363         struct ieee80211_hdr *hdr =
 364                                 (struct ieee80211_hdr *)tx_context->skb->data;
 365         u32 frame_len = tx_context->frame_len;
 366         u16 rate = tx_context->tx_rate;
 367         u8 need_ack = tx_context->need_ack;
 368
 369         /* Get SignalField,ServiceField,Length */
 370         vnt_get_phy_field(priv, frame_len, rate,
 371                           tx_context->pkt_type, &buf->ab);
 372
 373         /* Get Duration and TimeStampOff */
 374         if (ieee80211_is_pspoll(hdr->frame_control)) {
 375                 __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
 376
 377                 buf->duration = dur;
 378         } else {
 379                 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
 380                                                     need_ack);
 381         }
 382
 383         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 384
 385         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 386
 387         return le16_to_cpu(buf->duration);
 388 }
 389
 390 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
 391                                   struct ieee80211_rts *rts, __le16 duration)
 392 {
 393         struct ieee80211_hdr *hdr =
 394                                 (struct ieee80211_hdr *)tx_context->skb->data;
 395
 396         rts->duration = duration;
 397         rts->frame_control =
 398                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 399
 400         ether_addr_copy(rts->ra, hdr->addr1);
 401         ether_addr_copy(rts->ta, hdr->addr2);
 402
 403         return 0;
 404 }
 405
 406 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
 407                                struct vnt_rts_g *buf)
 408 {
 409         struct vnt_private *priv = tx_context->priv;
 410         u16 rts_frame_len = 20;
 411         u16 current_rate = tx_context->tx_rate;
 412
 413         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 414                           PK_TYPE_11B, &buf->b);
 415         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 416                           tx_context->pkt_type, &buf->a);
 417
 418         buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
 419                                                       PK_TYPE_11B,
 420                                                       priv->top_cck_basic_rate);
 421         buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 422                                                       tx_context->pkt_type,
 423                                                       current_rate);
 424         buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
 425                                                       tx_context->pkt_type,
 426                                                       current_rate);
 427
 428         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 429
 430         return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 431 }
 432
 433 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
 434                                   struct vnt_rts_g_fb *buf)
 435 {
 436         struct vnt_private *priv = tx_context->priv;
 437         u16 current_rate = tx_context->tx_rate;
 438         u16 rts_frame_len = 20;
 439
 440         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 441                           PK_TYPE_11B, &buf->b);
 442         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 443                           tx_context->pkt_type, &buf->a);
 444
 445         buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
 446                                                       PK_TYPE_11B,
 447                                                       priv->top_cck_basic_rate);
 448         buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 449                                                       tx_context->pkt_type,
 450                                                       current_rate);
 451         buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
 452                                                       tx_context->pkt_type,
 453                                                       current_rate);
 454
 455         buf->rts_duration_ba_f0 =
 456                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
 457                                            tx_context->pkt_type,
 458                                            priv->tx_rate_fb0);
 459         buf->rts_duration_aa_f0 =
 460                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
 461                                            tx_context->pkt_type,
 462                                            priv->tx_rate_fb0);
 463         buf->rts_duration_ba_f1 =
 464                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
 465                                            tx_context->pkt_type,
 466                                            priv->tx_rate_fb1);
 467         buf->rts_duration_aa_f1 =
 468                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
 469                                            tx_context->pkt_type,
 470                                            priv->tx_rate_fb1);
 471
 472         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 473
 474         return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
 475 }
 476
 477 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
 478                                 struct vnt_rts_ab *buf)
 479 {
 480         struct vnt_private *priv = tx_context->priv;
 481         u16 current_rate = tx_context->tx_rate;
 482         u16 rts_frame_len = 20;
 483
 484         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 485                           tx_context->pkt_type, &buf->ab);
 486
 487         buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 488                                                    tx_context->pkt_type,
 489                                                    current_rate);
 490
 491         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 492
 493         return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
 494 }
 495
 496 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
 497                                   struct vnt_rts_a_fb *buf)
 498 {
 499         struct vnt_private *priv = tx_context->priv;
 500         u16 current_rate = tx_context->tx_rate;
 501         u16 rts_frame_len = 20;
 502
 503         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 504                           tx_context->pkt_type, &buf->a);
 505
 506         buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 507                                                    tx_context->pkt_type,
 508                                                    current_rate);
 509
 510         buf->rts_duration_f0 =
 511                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
 512                                            tx_context->pkt_type,
 513                                            priv->tx_rate_fb0);
 514
 515         buf->rts_duration_f1 =
 516                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
 517                                            tx_context->pkt_type,
 518                                            priv->tx_rate_fb1);
 519
 520         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 521
 522         return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
 523 }
 524
 525 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
 526                                 union vnt_tx_data_head *head)
 527 {
 528         struct vnt_private *priv = tx_context->priv;
 529         struct vnt_cts_fb *buf = &head->cts_g_fb;
 530         u32 cts_frame_len = 14;
 531         u16 current_rate = tx_context->tx_rate;
 532
 533         /* Get SignalField,ServiceField,Length */
 534         vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
 535                           PK_TYPE_11B, &buf->b);
 536
 537         buf->duration_ba =
 538                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
 539                                            tx_context->pkt_type,
 540                                            current_rate);
 541         /* Get CTSDuration_ba_f0 */
 542         buf->cts_duration_ba_f0 =
 543                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
 544                                            tx_context->pkt_type,
 545                                            priv->tx_rate_fb0);
 546         /* Get CTSDuration_ba_f1 */
 547         buf->cts_duration_ba_f1 =
 548                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
 549                                            tx_context->pkt_type,
 550                                            priv->tx_rate_fb1);
 551         /* Get CTS Frame body */
 552         buf->data.duration = buf->duration_ba;
 553         buf->data.frame_control =
 554                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 555
 556         ether_addr_copy(buf->data.ra, priv->current_net_addr);
 557
 558         return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
 559 }
 560
 561 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
 562                              union vnt_tx_data_head *head)
 563 {
 564         struct vnt_private *priv = tx_context->priv;
 565         struct vnt_cts *buf = &head->cts_g;
 566         u32 cts_frame_len = 14;
 567         u16 current_rate = tx_context->tx_rate;
 568
 569         /* Get SignalField,ServiceField,Length */
 570         vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
 571                           PK_TYPE_11B, &buf->b);
 572         /* Get CTSDuration_ba */
 573         buf->duration_ba =
 574                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
 575                                            tx_context->pkt_type,
 576                                            current_rate);
 577         /*Get CTS Frame body*/
 578         buf->data.duration = buf->duration_ba;
 579         buf->data.frame_control =
 580                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 581
 582         ether_addr_copy(buf->data.ra, priv->current_net_addr);
 583
 584         return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 585 }
 586
 587 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
 588                         union vnt_tx_head *tx_head, bool need_mic)
 589 {
 590         struct vnt_private *priv = tx_context->priv;
 591         struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
 592         union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
 593         u32 frame_len = tx_context->frame_len;
 594         u16 current_rate = tx_context->tx_rate;
 595         u8 need_ack = tx_context->need_ack;
 596
 597         buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
 598                         tx_context->pkt_type, frame_len, current_rate);
 599         buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
 600                         tx_context->pkt_type, frame_len, current_rate);
 601         buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
 602                         tx_context->pkt_type, frame_len, current_rate);
 603
 604         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 605                                                 frame_len, current_rate,
 606                                                 need_ack);
 607         buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
 608                                         priv->top_cck_basic_rate, need_ack);
 609
 610         if (need_mic)
 611                 head = &tx_head->tx_rts.tx.mic.head;
 612
 613         if (tx_context->fb_option)
 614                 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
 615
 616         return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
 617 }
 618
 619 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
 620                         union vnt_tx_head *tx_head, bool need_mic)
 621 {
 622         struct vnt_private *priv = tx_context->priv;
 623         struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
 624         union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
 625         u32 frame_len = tx_context->frame_len;
 626         u16 current_rate = tx_context->tx_rate;
 627         u8 need_ack = tx_context->need_ack;
 628
 629         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 630                                         frame_len, current_rate, need_ack);
 631         buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
 632                                 frame_len, priv->top_cck_basic_rate, need_ack);
 633
 634         buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
 635                         tx_context->pkt_type, frame_len, current_rate);
 636
 637         if (need_mic)
 638                 head = &tx_head->tx_cts.tx.mic.head;
 639
 640         /* Fill CTS */
 641         if (tx_context->fb_option)
 642                 return vnt_fill_cts_fb_head(tx_context, head);
 643
 644         return vnt_fill_cts_head(tx_context, head);
 645 }
 646
 647 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
 648                        union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
 649 {
 650         struct vnt_private *priv = tx_context->priv;
 651         struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
 652         union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
 653         u32 frame_len = tx_context->frame_len;
 654         u16 current_rate = tx_context->tx_rate;
 655         u8 need_ack = tx_context->need_ack;
 656
 657         buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 658                                               frame_len, current_rate, need_ack);
 659
 660         if (need_mic)
 661                 head = &tx_head->tx_ab.tx.mic.head;
 662
 663         if (need_rts) {
 664                 if (tx_context->pkt_type == PK_TYPE_11B)
 665                         buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
 666                                 tx_context->pkt_type, frame_len, current_rate);
 667                 else /* PK_TYPE_11A */
 668                         buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
 669                                 tx_context->pkt_type, frame_len, current_rate);
 670
 671                 if (tx_context->fb_option &&
 672                     tx_context->pkt_type == PK_TYPE_11A)
 673                         return vnt_rxtx_rts_a_fb_head(tx_context,
 674                                                       &head->rts_a_fb);
 675
 676                 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
 677         }
 678
 679         if (tx_context->pkt_type == PK_TYPE_11A)
 680                 return vnt_rxtx_datahead_a_fb(tx_context,
 681                                               &head->data_head_a_fb);
 682
 683         return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
 684 }
 685
 686 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
 687                                      struct vnt_tx_buffer *tx_buffer,
 688                                      struct vnt_mic_hdr **mic_hdr, u32 need_mic,
 689                                      bool need_rts)
 690 {
 691         if (tx_context->pkt_type == PK_TYPE_11GB ||
 692             tx_context->pkt_type == PK_TYPE_11GA) {
 693                 if (need_rts) {
 694                         if (need_mic)
 695                                 *mic_hdr =
 696                                         &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
 697
 698                         return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
 699                                             need_mic);
 700                 }
 701
 702                 if (need_mic)
 703                         *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
 704
 705                 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
 706         }
 707
 708         if (need_mic)
 709                 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
 710
 711         return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
 712 }
 713
 714 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
 715                            u8 *key_buffer, struct ieee80211_key_conf *tx_key,
 716                            struct sk_buff *skb, u16 payload_len,
 717                            struct vnt_mic_hdr *mic_hdr)
 718 {
 719         struct ieee80211_hdr *hdr = tx_context->hdr;
 720         u64 pn64;
 721         u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
 722
 723         /* strip header and icv len from payload */
 724         payload_len -= ieee80211_get_hdrlen_from_skb(skb);
 725         payload_len -= tx_key->icv_len;
 726
 727         switch (tx_key->cipher) {
 728         case WLAN_CIPHER_SUITE_WEP40:
 729         case WLAN_CIPHER_SUITE_WEP104:
 730                 memcpy(key_buffer, iv, 3);
 731                 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
 732
 733                 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
 734                         memcpy(key_buffer + 8, iv, 3);
 735                         memcpy(key_buffer + 11,
 736                                tx_key->key, WLAN_KEY_LEN_WEP40);
 737                 }
 738
 739                 break;
 740         case WLAN_CIPHER_SUITE_TKIP:
 741                 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
 742
 743                 break;
 744         case WLAN_CIPHER_SUITE_CCMP:
 745
 746                 if (!mic_hdr)
 747                         return;
 748
 749                 mic_hdr->id = 0x59;
 750                 mic_hdr->payload_len = cpu_to_be16(payload_len);
 751                 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
 752
 753                 pn64 = atomic64_read(&tx_key->tx_pn);
 754                 mic_hdr->ccmp_pn[5] = pn64;
 755                 mic_hdr->ccmp_pn[4] = pn64 >> 8;
 756                 mic_hdr->ccmp_pn[3] = pn64 >> 16;
 757                 mic_hdr->ccmp_pn[2] = pn64 >> 24;
 758                 mic_hdr->ccmp_pn[1] = pn64 >> 32;
 759                 mic_hdr->ccmp_pn[0] = pn64 >> 40;
 760
 761                 if (ieee80211_has_a4(hdr->frame_control))
 762                         mic_hdr->hlen = cpu_to_be16(28);
 763                 else
 764                         mic_hdr->hlen = cpu_to_be16(22);
 765
 766                 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
 767                 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
 768                 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
 769
 770                 mic_hdr->frame_control = cpu_to_le16(
 771                         le16_to_cpu(hdr->frame_control) & 0xc78f);
 772                 mic_hdr->seq_ctrl = cpu_to_le16(
 773                                 le16_to_cpu(hdr->seq_ctrl) & 0xf);
 774
 775                 if (ieee80211_has_a4(hdr->frame_control))
 776                         ether_addr_copy(mic_hdr->addr4, hdr->addr4);
 777
 778                 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
 779
 780                 break;
 781         default:
 782                 break;
 783         }
 784 }
 785
 786 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
 787 {
 788         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 789         struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
 790         struct ieee80211_rate *rate;
 791         struct ieee80211_key_conf *tx_key;
 792         struct ieee80211_hdr *hdr;
 793         struct vnt_mic_hdr *mic_hdr = NULL;
 794         struct vnt_tx_buffer *tx_buffer;
 795         struct vnt_tx_fifo_head *tx_buffer_head;
 796         struct vnt_usb_send_context *tx_context;
 797         unsigned long flags;
 798         u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
 799         u8 pkt_type, fb_option = AUTO_FB_NONE;
 800         bool need_rts = false;
 801         bool need_mic = false;
 802
 803         hdr = (struct ieee80211_hdr *)(skb->data);
 804
 805         rate = ieee80211_get_tx_rate(priv->hw, info);
 806
 807         current_rate = rate->hw_value;
 808         if (priv->current_rate != current_rate &&
 809             !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
 810                 priv->current_rate = current_rate;
 811                 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
 812         }
 813
 814         if (current_rate > RATE_11M) {
 815                 if (info->band == NL80211_BAND_5GHZ) {
 816                         pkt_type = PK_TYPE_11A;
 817                 } else {
 818                         if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
 819                                 pkt_type = PK_TYPE_11GB;
 820                         else
 821                                 pkt_type = PK_TYPE_11GA;
 822                 }
 823         } else {
 824                 pkt_type = PK_TYPE_11B;
 825         }
 826
 827         spin_lock_irqsave(&priv->lock, flags);
 828
 829         tx_context = vnt_get_free_context(priv);
 830         if (!tx_context) {
 831                 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
 832                 spin_unlock_irqrestore(&priv->lock, flags);
 833                 return -ENOMEM;
 834         }
 835
 836         tx_context->skb = skb;
 837         tx_context->pkt_type = pkt_type;
 838         tx_context->need_ack = false;
 839         tx_context->frame_len = skb->len + 4;
 840         tx_context->tx_rate = current_rate;
 841
 842         spin_unlock_irqrestore(&priv->lock, flags);
 843
 844         tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
 845         tx_buffer_head = &tx_buffer->fifo_head;
 846         tx_body_size = skb->len;
 847
 848         /*Set fifo controls */
 849         if (pkt_type == PK_TYPE_11A)
 850                 tx_buffer_head->fifo_ctl = 0;
 851         else if (pkt_type == PK_TYPE_11B)
 852                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
 853         else if (pkt_type == PK_TYPE_11GB)
 854                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
 855         else if (pkt_type == PK_TYPE_11GA)
 856                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
 857
 858         if (!ieee80211_is_data(hdr->frame_control)) {
 859                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
 860                                                         FIFOCTL_ISDMA0);
 861                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
 862
 863                 tx_buffer_head->time_stamp =
 864                         cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
 865         } else {
 866                 tx_buffer_head->time_stamp =
 867                         cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
 868         }
 869
 870         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 871                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
 872                 tx_context->need_ack = true;
 873         }
 874
 875         if (ieee80211_has_retry(hdr->frame_control))
 876                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
 877
 878         if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
 879                 priv->preamble_type = PREAMBLE_SHORT;
 880         else
 881                 priv->preamble_type = PREAMBLE_LONG;
 882
 883         if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 884                 need_rts = true;
 885                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
 886         }
 887
 888         if (ieee80211_has_a4(hdr->frame_control))
 889                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
 890
 891         tx_buffer_head->frag_ctl =
 892                         cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
 893
 894         if (info->control.hw_key) {
 895                 tx_key = info->control.hw_key;
 896                 switch (info->control.hw_key->cipher) {
 897                 case WLAN_CIPHER_SUITE_WEP40:
 898                 case WLAN_CIPHER_SUITE_WEP104:
 899                         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
 900                         break;
 901                 case WLAN_CIPHER_SUITE_TKIP:
 902                         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
 903                         break;
 904                 case WLAN_CIPHER_SUITE_CCMP:
 905                         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
 906                         need_mic = true;
 907                 default:
 908                         break;
 909                 }
 910                 tx_context->frame_len += tx_key->icv_len;
 911         }
 912
 913         tx_buffer_head->current_rate = cpu_to_le16(current_rate);
 914
 915         /* legacy rates TODO use ieee80211_tx_rate */
 916         if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
 917                 if (priv->auto_fb_ctrl == AUTO_FB_0) {
 918                         tx_buffer_head->fifo_ctl |=
 919                                                 cpu_to_le16(FIFOCTL_AUTO_FB_0);
 920
 921                         priv->tx_rate_fb0 =
 922                                 vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
 923                         priv->tx_rate_fb1 =
 924                                 vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
 925
 926                         fb_option = AUTO_FB_0;
 927                 } else if (priv->auto_fb_ctrl == AUTO_FB_1) {
 928                         tx_buffer_head->fifo_ctl |=
 929                                                 cpu_to_le16(FIFOCTL_AUTO_FB_1);
 930
 931                         priv->tx_rate_fb0 =
 932                                 vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
 933                         priv->tx_rate_fb1 =
 934                                 vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
 935
 936                         fb_option = AUTO_FB_1;
 937                 }
 938         }
 939
 940         tx_context->fb_option = fb_option;
 941
 942         duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
 943                                                 need_mic, need_rts);
 944
 945         tx_header_size = tx_context->tx_hdr_size;
 946         if (!tx_header_size) {
 947                 tx_context->in_use = false;
 948                 return -ENOMEM;
 949         }
 950
 951         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
 952
 953         tx_bytes = tx_header_size + tx_body_size;
 954
 955         memcpy(tx_context->hdr, skb->data, tx_body_size);
 956
 957         hdr->duration_id = cpu_to_le16(duration_id);
 958
 959         if (info->control.hw_key) {
 960                 tx_key = info->control.hw_key;
 961                 if (tx_key->keylen > 0)
 962                         vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
 963                                        tx_key, skb, tx_body_size, mic_hdr);
 964         }
 965
 966         priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
 967                                                 IEEE80211_SCTL_SEQ) >> 4;
 968
 969         tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
 970         tx_buffer->pkt_no = tx_context->pkt_no;
 971         tx_buffer->type = 0x00;
 972
 973         tx_bytes += 4;
 974
 975         tx_context->type = CONTEXT_DATA_PACKET;
 976         tx_context->buf_len = tx_bytes;
 977
 978         spin_lock_irqsave(&priv->lock, flags);
 979
 980         if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
 981                 spin_unlock_irqrestore(&priv->lock, flags);
 982                 return -EIO;
 983         }
 984
 985         spin_unlock_irqrestore(&priv->lock, flags);
 986
 987         return 0;
 988 }
 989
 990 static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb)
 991 {
 992         struct vnt_beacon_buffer *beacon_buffer;
 993         struct vnt_tx_short_buf_head *short_head;
 994         struct ieee80211_tx_info *info;
 995         struct vnt_usb_send_context *context;
 996         struct ieee80211_mgmt *mgmt_hdr;
 997         unsigned long flags;
 998         u32 frame_size = skb->len + 4;
 999         u16 current_rate, count;
1000
1001         spin_lock_irqsave(&priv->lock, flags);
1002
1003         context = vnt_get_free_context(priv);
1004         if (!context) {
1005                 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
1006                 spin_unlock_irqrestore(&priv->lock, flags);
1007                 return -ENOMEM;
1008         }
1009
1010         context->skb = skb;
1011
1012         spin_unlock_irqrestore(&priv->lock, flags);
1013
1014         beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
1015         short_head = &beacon_buffer->short_head;
1016
1017         if (priv->bb_type == BB_TYPE_11A) {
1018                 current_rate = RATE_6M;
1019
1020                 /* Get SignalField,ServiceField,Length */
1021                 vnt_get_phy_field(priv, frame_size, current_rate,
1022                                   PK_TYPE_11A, &short_head->ab);
1023
1024                 /* Get Duration and TimeStampOff */
1025                 short_head->duration = vnt_get_duration_le(priv,
1026                                                            PK_TYPE_11A, false);
1027                 short_head->time_stamp_off =
1028                                 vnt_time_stamp_off(priv, current_rate);
1029         } else {
1030                 current_rate = RATE_1M;
1031                 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
1032
1033                 /* Get SignalField,ServiceField,Length */
1034                 vnt_get_phy_field(priv, frame_size, current_rate,
1035                                   PK_TYPE_11B, &short_head->ab);
1036
1037                 /* Get Duration and TimeStampOff */
1038                 short_head->duration = vnt_get_duration_le(priv,
1039                                                            PK_TYPE_11B, false);
1040                 short_head->time_stamp_off =
1041                         vnt_time_stamp_off(priv, current_rate);
1042         }
1043
1044         /* Generate Beacon Header */
1045         mgmt_hdr = &beacon_buffer->mgmt_hdr;
1046         memcpy(mgmt_hdr, skb->data, skb->len);
1047
1048         /* time stamp always 0 */
1049         mgmt_hdr->u.beacon.timestamp = 0;
1050
1051         info = IEEE80211_SKB_CB(skb);
1052         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1053                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
1054
1055                 hdr->duration_id = 0;
1056                 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
1057         }
1058
1059         priv->seq_counter++;
1060         if (priv->seq_counter > 0x0fff)
1061                 priv->seq_counter = 0;
1062
1063         count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
1064
1065         beacon_buffer->tx_byte_count = cpu_to_le16(count);
1066         beacon_buffer->pkt_no = context->pkt_no;
1067         beacon_buffer->type = 0x01;
1068
1069         context->type = CONTEXT_BEACON_PACKET;
1070         context->buf_len = count + 4; /* USB header */
1071
1072         spin_lock_irqsave(&priv->lock, flags);
1073
1074         if (vnt_tx_context(priv, context) != STATUS_PENDING)
1075                 ieee80211_free_txskb(priv->hw, context->skb);
1076
1077         spin_unlock_irqrestore(&priv->lock, flags);
1078
1079         return 0;
1080 }
1081
1082 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
1083 {
1084         struct sk_buff *beacon;
1085
1086         beacon = ieee80211_beacon_get(priv->hw, vif);
1087         if (!beacon)
1088                 return -ENOMEM;
1089
1090         if (vnt_beacon_xmit(priv, beacon)) {
1091                 ieee80211_free_txskb(priv->hw, beacon);
1092                 return -ENODEV;
1093         }
1094
1095         return 0;
1096 }
1097
1098 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
1099                       struct ieee80211_bss_conf *conf)
1100 {
1101         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
1102
1103         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1104
1105         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
1106
1107         vnt_clear_current_tsf(priv);
1108
1109         vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1110
1111         vnt_reset_next_tbtt(priv, conf->beacon_int);
1112
1113         return vnt_beacon_make(priv, vif);
1114 }