drivers/staging/vt6656/rxtx.c

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