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,
 116                                               14, (u16)priv->top_cck_basic_rate);
 117         else
 118                 ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
 119                                               14, (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_nullfunc(hdr->frame_control)) {
 282                 buf->duration_a = hdr->duration_id;
 283                 buf->duration_b = hdr->duration_id;
 284         } else {
 285                 buf->duration_a = vnt_get_duration_le(priv,
 286                                                 tx_context->pkt_type, need_ack);
 287                 buf->duration_b = vnt_get_duration_le(priv,
 288                                                         PK_TYPE_11B, need_ack);
 289         }
 290
 291         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 292         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 293                                         priv->top_cck_basic_rate);
 294
 295         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 296
 297         return le16_to_cpu(buf->duration_a);
 298 }
 299
 300 static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
 301                                   struct vnt_tx_datahead_g_fb *buf)
 302 {
 303         struct vnt_private *priv = tx_context->priv;
 304         u32 frame_len = tx_context->frame_len;
 305         u16 rate = tx_context->tx_rate;
 306         u8 need_ack = tx_context->need_ack;
 307
 308         /* Get SignalField,ServiceField,Length */
 309         vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
 310
 311         vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
 312                           PK_TYPE_11B, &buf->b);
 313
 314         /* Get Duration and TimeStamp */
 315         buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type,
 316                                               need_ack);
 317         buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
 318
 319         buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
 320                                                  need_ack);
 321         buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
 322                                                  need_ack);
 323
 324         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 325         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 326                                                 priv->top_cck_basic_rate);
 327
 328         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 329
 330         return le16_to_cpu(buf->duration_a);
 331 }
 332
 333 static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
 334                                   struct vnt_tx_datahead_a_fb *buf)
 335 {
 336         struct vnt_private *priv = tx_context->priv;
 337         u16 rate = tx_context->tx_rate;
 338         u8 pkt_type = tx_context->pkt_type;
 339         u8 need_ack = tx_context->need_ack;
 340         u32 frame_len = tx_context->frame_len;
 341
 342         /* Get SignalField,ServiceField,Length */
 343         vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
 344         /* Get Duration and TimeStampOff */
 345         buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
 346
 347         buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
 348         buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
 349
 350         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 351
 352         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 353
 354         return le16_to_cpu(buf->duration);
 355 }
 356
 357 static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
 358                                 struct vnt_tx_datahead_ab *buf)
 359 {
 360         struct vnt_private *priv = tx_context->priv;
 361         struct ieee80211_hdr *hdr =
 362                                 (struct ieee80211_hdr *)tx_context->skb->data;
 363         u32 frame_len = tx_context->frame_len;
 364         u16 rate = tx_context->tx_rate;
 365         u8 need_ack = tx_context->need_ack;
 366
 367         /* Get SignalField,ServiceField,Length */
 368         vnt_get_phy_field(priv, frame_len, rate,
 369                           tx_context->pkt_type, &buf->ab);
 370
 371         /* Get Duration and TimeStampOff */
 372         if (ieee80211_is_nullfunc(hdr->frame_control)) {
 373                 buf->duration = hdr->duration_id;
 374         } else {
 375                 buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
 376                                                     need_ack);
 377         }
 378
 379         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 380
 381         tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
 382
 383         return le16_to_cpu(buf->duration);
 384 }
 385
 386 static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
 387                                   struct ieee80211_rts *rts, __le16 duration)
 388 {
 389         struct ieee80211_hdr *hdr =
 390                                 (struct ieee80211_hdr *)tx_context->skb->data;
 391
 392         rts->duration = duration;
 393         rts->frame_control =
 394                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 395
 396         ether_addr_copy(rts->ra, hdr->addr1);
 397         ether_addr_copy(rts->ta, hdr->addr2);
 398
 399         return 0;
 400 }
 401
 402 static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
 403                                struct vnt_rts_g *buf)
 404 {
 405         struct vnt_private *priv = tx_context->priv;
 406         u16 rts_frame_len = 20;
 407         u16 current_rate = tx_context->tx_rate;
 408
 409         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 410                           PK_TYPE_11B, &buf->b);
 411         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 412                           tx_context->pkt_type, &buf->a);
 413
 414         buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
 415                                                       PK_TYPE_11B,
 416                                                       priv->top_cck_basic_rate);
 417         buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 418                                                       tx_context->pkt_type,
 419                                                       current_rate);
 420         buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
 421                                                       tx_context->pkt_type,
 422                                                       current_rate);
 423
 424         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 425
 426         return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 427 }
 428
 429 static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
 430                                   struct vnt_rts_g_fb *buf)
 431 {
 432         struct vnt_private *priv = tx_context->priv;
 433         u16 current_rate = tx_context->tx_rate;
 434         u16 rts_frame_len = 20;
 435
 436         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 437                           PK_TYPE_11B, &buf->b);
 438         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 439                           tx_context->pkt_type, &buf->a);
 440
 441         buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB,
 442                                                       PK_TYPE_11B,
 443                                                       priv->top_cck_basic_rate);
 444         buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 445                                                       tx_context->pkt_type,
 446                                                       current_rate);
 447         buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
 448                                                       tx_context->pkt_type,
 449                                                       current_rate);
 450
 451         buf->rts_duration_ba_f0 =
 452                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
 453                                            tx_context->pkt_type,
 454                                            priv->tx_rate_fb0);
 455         buf->rts_duration_aa_f0 =
 456                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
 457                                            tx_context->pkt_type,
 458                                            priv->tx_rate_fb0);
 459         buf->rts_duration_ba_f1 =
 460                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
 461                                            tx_context->pkt_type,
 462                                            priv->tx_rate_fb1);
 463         buf->rts_duration_aa_f1 =
 464                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
 465                                            tx_context->pkt_type,
 466                                            priv->tx_rate_fb1);
 467
 468         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 469
 470         return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
 471 }
 472
 473 static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
 474                                 struct vnt_rts_ab *buf)
 475 {
 476         struct vnt_private *priv = tx_context->priv;
 477         u16 current_rate = tx_context->tx_rate;
 478         u16 rts_frame_len = 20;
 479
 480         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 481                           tx_context->pkt_type, &buf->ab);
 482
 483         buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 484                                                    tx_context->pkt_type,
 485                                                    current_rate);
 486
 487         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 488
 489         return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
 490 }
 491
 492 static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
 493                                   struct vnt_rts_a_fb *buf)
 494 {
 495         struct vnt_private *priv = tx_context->priv;
 496         u16 current_rate = tx_context->tx_rate;
 497         u16 rts_frame_len = 20;
 498
 499         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 500                           tx_context->pkt_type, &buf->a);
 501
 502         buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
 503                                                    tx_context->pkt_type,
 504                                                    current_rate);
 505
 506         buf->rts_duration_f0 =
 507                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
 508                                            tx_context->pkt_type,
 509                                            priv->tx_rate_fb0);
 510
 511         buf->rts_duration_f1 =
 512                 vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
 513                                            tx_context->pkt_type,
 514                                            priv->tx_rate_fb1);
 515
 516         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 517
 518         return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
 519 }
 520
 521 static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
 522                                 union vnt_tx_data_head *head)
 523 {
 524         struct vnt_private *priv = tx_context->priv;
 525         struct vnt_cts_fb *buf = &head->cts_g_fb;
 526         u32 cts_frame_len = 14;
 527         u16 current_rate = tx_context->tx_rate;
 528
 529         /* Get SignalField,ServiceField,Length */
 530         vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
 531                           PK_TYPE_11B, &buf->b);
 532
 533         buf->duration_ba =
 534                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
 535                                            tx_context->pkt_type,
 536                                            current_rate);
 537         /* Get CTSDuration_ba_f0 */
 538         buf->cts_duration_ba_f0 =
 539                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
 540                                            tx_context->pkt_type,
 541                                            priv->tx_rate_fb0);
 542         /* Get CTSDuration_ba_f1 */
 543         buf->cts_duration_ba_f1 =
 544                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
 545                                            tx_context->pkt_type,
 546                                            priv->tx_rate_fb1);
 547         /* Get CTS Frame body */
 548         buf->data.duration = buf->duration_ba;
 549         buf->data.frame_control =
 550                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 551
 552         ether_addr_copy(buf->data.ra, priv->current_net_addr);
 553
 554         return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
 555 }
 556
 557 static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
 558                              union vnt_tx_data_head *head)
 559 {
 560         struct vnt_private *priv = tx_context->priv;
 561         struct vnt_cts *buf = &head->cts_g;
 562         u32 cts_frame_len = 14;
 563         u16 current_rate = tx_context->tx_rate;
 564
 565         /* Get SignalField,ServiceField,Length */
 566         vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
 567                           PK_TYPE_11B, &buf->b);
 568         /* Get CTSDuration_ba */
 569         buf->duration_ba =
 570                 vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
 571                                            tx_context->pkt_type,
 572                                            current_rate);
 573         /*Get CTS Frame body*/
 574         buf->data.duration = buf->duration_ba;
 575         buf->data.frame_control =
 576                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 577
 578         ether_addr_copy(buf->data.ra, priv->current_net_addr);
 579
 580         return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 581 }
 582
 583 static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
 584                         union vnt_tx_head *tx_head, bool need_mic)
 585 {
 586         struct vnt_private *priv = tx_context->priv;
 587         struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
 588         union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
 589         u32 frame_len = tx_context->frame_len;
 590         u16 current_rate = tx_context->tx_rate;
 591         u8 need_ack = tx_context->need_ack;
 592
 593         buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
 594                         tx_context->pkt_type, frame_len, current_rate);
 595         buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
 596                         tx_context->pkt_type, frame_len, current_rate);
 597         buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
 598                         tx_context->pkt_type, frame_len, current_rate);
 599
 600         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 601                                                 frame_len, current_rate,
 602                                                 need_ack);
 603         buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
 604                                         priv->top_cck_basic_rate, need_ack);
 605
 606         if (need_mic)
 607                 head = &tx_head->tx_rts.tx.mic.head;
 608
 609         if (tx_context->fb_option)
 610                 return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
 611
 612         return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
 613 }
 614
 615 static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
 616                         union vnt_tx_head *tx_head, bool need_mic)
 617 {
 618         struct vnt_private *priv = tx_context->priv;
 619         struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
 620         union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
 621         u32 frame_len = tx_context->frame_len;
 622         u16 current_rate = tx_context->tx_rate;
 623         u8 need_ack = tx_context->need_ack;
 624
 625         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 626                                         frame_len, current_rate, need_ack);
 627         buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
 628                                 frame_len, priv->top_cck_basic_rate, need_ack);
 629
 630         buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
 631                         tx_context->pkt_type, frame_len, current_rate);
 632
 633         if (need_mic)
 634                 head = &tx_head->tx_cts.tx.mic.head;
 635
 636         /* Fill CTS */
 637         if (tx_context->fb_option)
 638                 return vnt_fill_cts_fb_head(tx_context, head);
 639
 640         return vnt_fill_cts_head(tx_context, head);
 641 }
 642
 643 static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
 644                        union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
 645 {
 646         struct vnt_private *priv = tx_context->priv;
 647         struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
 648         union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
 649         u32 frame_len = tx_context->frame_len;
 650         u16 current_rate = tx_context->tx_rate;
 651         u8 need_ack = tx_context->need_ack;
 652
 653         buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
 654                         frame_len, current_rate, need_ack);
 655
 656         if (need_mic)
 657                 head = &tx_head->tx_ab.tx.mic.head;
 658
 659         if (need_rts) {
 660                 if (tx_context->pkt_type == PK_TYPE_11B)
 661                         buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
 662                                 tx_context->pkt_type, frame_len, current_rate);
 663                 else /* PK_TYPE_11A */
 664                         buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
 665                                 tx_context->pkt_type, frame_len, current_rate);
 666
 667                 if (tx_context->fb_option &&
 668                     tx_context->pkt_type == PK_TYPE_11A)
 669                         return vnt_rxtx_rts_a_fb_head(tx_context,
 670                                                       &head->rts_a_fb);
 671
 672                 return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
 673         }
 674
 675         if (tx_context->pkt_type == PK_TYPE_11A)
 676                 return vnt_rxtx_datahead_a_fb(tx_context,
 677                                               &head->data_head_a_fb);
 678
 679         return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
 680 }
 681
 682 static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
 683                                      struct vnt_tx_buffer *tx_buffer,
 684                                      struct vnt_mic_hdr **mic_hdr, u32 need_mic,
 685                                      bool need_rts)
 686 {
 687         if (tx_context->pkt_type == PK_TYPE_11GB ||
 688             tx_context->pkt_type == PK_TYPE_11GA) {
 689                 if (need_rts) {
 690                         if (need_mic)
 691                                 *mic_hdr =
 692                                         &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
 693
 694                         return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
 695                                             need_mic);
 696                 }
 697
 698                 if (need_mic)
 699                         *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
 700
 701                 return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
 702         }
 703
 704         if (need_mic)
 705                 *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
 706
 707         return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
 708 }
 709
 710 static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
 711                            u8 *key_buffer, struct ieee80211_key_conf *tx_key,
 712                            struct sk_buff *skb, u16 payload_len,
 713                            struct vnt_mic_hdr *mic_hdr)
 714 {
 715         struct ieee80211_hdr *hdr = tx_context->hdr;
 716         u64 pn64;
 717         u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
 718
 719         /* strip header and icv len from payload */
 720         payload_len -= ieee80211_get_hdrlen_from_skb(skb);
 721         payload_len -= tx_key->icv_len;
 722
 723         switch (tx_key->cipher) {
 724         case WLAN_CIPHER_SUITE_WEP40:
 725         case WLAN_CIPHER_SUITE_WEP104:
 726                 memcpy(key_buffer, iv, 3);
 727                 memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
 728
 729                 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
 730                         memcpy(key_buffer + 8, iv, 3);
 731                         memcpy(key_buffer + 11,
 732                                tx_key->key, WLAN_KEY_LEN_WEP40);
 733                 }
 734
 735                 break;
 736         case WLAN_CIPHER_SUITE_TKIP:
 737                 ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
 738
 739                 break;
 740         case WLAN_CIPHER_SUITE_CCMP:
 741
 742                 if (!mic_hdr)
 743                         return;
 744
 745                 mic_hdr->id = 0x59;
 746                 mic_hdr->payload_len = cpu_to_be16(payload_len);
 747                 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
 748
 749                 pn64 = atomic64_read(&tx_key->tx_pn);
 750                 mic_hdr->ccmp_pn[5] = pn64;
 751                 mic_hdr->ccmp_pn[4] = pn64 >> 8;
 752                 mic_hdr->ccmp_pn[3] = pn64 >> 16;
 753                 mic_hdr->ccmp_pn[2] = pn64 >> 24;
 754                 mic_hdr->ccmp_pn[1] = pn64 >> 32;
 755                 mic_hdr->ccmp_pn[0] = pn64 >> 40;
 756
 757                 if (ieee80211_has_a4(hdr->frame_control))
 758                         mic_hdr->hlen = cpu_to_be16(28);
 759                 else
 760                         mic_hdr->hlen = cpu_to_be16(22);
 761
 762                 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
 763                 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
 764                 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
 765
 766                 mic_hdr->frame_control = cpu_to_le16(
 767                         le16_to_cpu(hdr->frame_control) & 0xc78f);
 768                 mic_hdr->seq_ctrl = cpu_to_le16(
 769                                 le16_to_cpu(hdr->seq_ctrl) & 0xf);
 770
 771                 if (ieee80211_has_a4(hdr->frame_control))
 772                         ether_addr_copy(mic_hdr->addr4, hdr->addr4);
 773
 774                 memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
 775
 776                 break;
 777         default:
 778                 break;
 779         }
 780 }
 781
 782 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
 783 {
 784         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 785         struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
 786         struct ieee80211_rate *rate;
 787         struct ieee80211_key_conf *tx_key;
 788         struct ieee80211_hdr *hdr;
 789         struct vnt_mic_hdr *mic_hdr = NULL;
 790         struct vnt_tx_buffer *tx_buffer;
 791         struct vnt_tx_fifo_head *tx_buffer_head;
 792         struct vnt_usb_send_context *tx_context;
 793         unsigned long flags;
 794         u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
 795         u8 pkt_type, fb_option = AUTO_FB_NONE;
 796         bool need_rts = false;
 797         bool need_mic = false;
 798
 799         hdr = (struct ieee80211_hdr *)(skb->data);
 800
 801         rate = ieee80211_get_tx_rate(priv->hw, info);
 802
 803         current_rate = rate->hw_value;
 804         if (priv->current_rate != current_rate &&
 805             !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
 806                 priv->current_rate = current_rate;
 807                 vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
 808         }
 809
 810         if (current_rate > RATE_11M) {
 811                 if (info->band == NL80211_BAND_5GHZ) {
 812                         pkt_type = PK_TYPE_11A;
 813                 } else {
 814                         if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 815                                 if (priv->basic_rates & VNT_B_RATES)
 816                                         pkt_type = PK_TYPE_11GB;
 817                                 else
 818                                         pkt_type = PK_TYPE_11GA;
 819                         } else {
 820                                 pkt_type = PK_TYPE_11A;
 821                         }
 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 }