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  * Purpose: handle WMAC/802.3/802.11 rx & tx functions
   7  *
   8  * Author: Lyndon Chen
   9  *
  10  * Date: May 20, 2003
  11  *
  12  * Functions:
  13  *      vnt_generate_tx_parameter - Generate tx dma required parameter.
  14  *      vnt_get_rsvtime- get frame reserved time
  15  *      vnt_fill_cts_head- fulfill CTS ctl header
  16  *
  17  * Revision History:
  18  *
  19  */
  20
  21 #include <linux/etherdevice.h>
  22 #include "device.h"
  23 #include "rxtx.h"
  24 #include "card.h"
  25 #include "mac.h"
  26 #include "rf.h"
  27 #include "usbpipe.h"
  28
  29 static const u16 vnt_time_stampoff[2][MAX_RATE] = {
  30         /* Long Preamble */
  31         {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
  32
  33         /* Short Preamble */
  34         {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
  35 };
  36
  37 #define DATADUR_B       10
  38 #define DATADUR_A       11
  39
  40 static const u8 vnt_phy_signal[] = {
  41         0x00,   /* RATE_1M  */
  42         0x01,   /* RATE_2M  */
  43         0x02,   /* RATE_5M  */
  44         0x03,   /* RATE_11M */
  45         0x8b,   /* RATE_6M  */
  46         0x8f,   /* RATE_9M  */
  47         0x8a,   /* RATE_12M */
  48         0x8e,   /* RATE_18M */
  49         0x89,   /* RATE_24M */
  50         0x8d,   /* RATE_36M */
  51         0x88,   /* RATE_48M */
  52         0x8c    /* RATE_54M */
  53 };
  54
  55 static struct vnt_usb_send_context
  56         *vnt_get_free_context(struct vnt_private *priv)
  57 {
  58         struct vnt_usb_send_context *context = NULL;
  59         int ii;
  60
  61         for (ii = 0; ii < priv->num_tx_context; ii++) {
  62                 if (!priv->tx_context[ii])
  63                         return NULL;
  64
  65                 context = priv->tx_context[ii];
  66                 if (!context->in_use) {
  67                         context->in_use = true;
  68                         return context;
  69                 }
  70         }
  71
  72         if (ii == priv->num_tx_context) {
  73                 dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
  74
  75                 ieee80211_stop_queues(priv->hw);
  76         }
  77
  78         return NULL;
  79 }
  80
  81 /* Get Length, Service, and Signal fields of Phy for Tx */
  82 static void vnt_get_phy_field(struct vnt_private *priv, u32 frame_length,
  83                               u16 tx_rate, u8 pkt_type,
  84                               struct vnt_phy_field *phy)
  85 {
  86         u32 bit_count;
  87         u32 count = 0;
  88         u32 tmp;
  89         int ext_bit;
  90         int i;
  91         u8 mask = 0;
  92         u8 preamble_type = priv->preamble_type;
  93
  94         bit_count = frame_length * 8;
  95         ext_bit = false;
  96
  97         switch (tx_rate) {
  98         case RATE_1M:
  99                 count = bit_count;
 100                 break;
 101         case RATE_2M:
 102                 count = bit_count / 2;
 103                 break;
 104         case RATE_5M:
 105                 count = DIV_ROUND_UP(bit_count * 10, 55);
 106                 break;
 107         case RATE_11M:
 108                 count = bit_count / 11;
 109                 tmp = count * 11;
 110
 111                 if (tmp != bit_count) {
 112                         count++;
 113
 114                         if ((bit_count - tmp) <= 3)
 115                                 ext_bit = true;
 116                 }
 117
 118                 break;
 119         }
 120
 121         if (tx_rate > RATE_11M) {
 122                 if (pkt_type == PK_TYPE_11A)
 123                         mask = BIT(4);
 124         } else if (tx_rate > RATE_1M) {
 125                 if (preamble_type == PREAMBLE_SHORT)
 126                         mask = BIT(3);
 127         }
 128
 129         i = tx_rate > RATE_54M ? RATE_54M : tx_rate;
 130         phy->signal = vnt_phy_signal[i] | mask;
 131         phy->service = 0x00;
 132
 133         if (pkt_type == PK_TYPE_11B) {
 134                 if (ext_bit)
 135                         phy->service |= 0x80;
 136                 phy->len = cpu_to_le16((u16)count);
 137         } else {
 138                 phy->len = cpu_to_le16((u16)frame_length);
 139         }
 140 }
 141
 142 static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
 143 {
 144         return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
 145                                                         [rate % MAX_RATE]);
 146 }
 147
 148 static __le16 vnt_rxtx_rsvtime_le16(struct vnt_usb_send_context *context)
 149 {
 150         struct vnt_private *priv = context->priv;
 151         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(context->skb);
 152         struct ieee80211_rate *rate = ieee80211_get_tx_rate(priv->hw, info);
 153
 154         return ieee80211_generic_frame_duration(priv->hw,
 155                                                  info->control.vif, info->band,
 156                                                  context->frame_len,
 157                                                  rate);
 158 }
 159
 160 static __le16 vnt_get_rts_duration(struct vnt_usb_send_context *context)
 161 {
 162         struct vnt_private *priv = context->priv;
 163         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(context->skb);
 164
 165         return ieee80211_rts_duration(priv->hw, priv->vif,
 166                                       context->frame_len, info);
 167 }
 168
 169 static __le16 vnt_get_cts_duration(struct vnt_usb_send_context *context)
 170 {
 171         struct vnt_private *priv = context->priv;
 172         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(context->skb);
 173
 174         return ieee80211_ctstoself_duration(priv->hw, priv->vif,
 175                                             context->frame_len, info);
 176 }
 177
 178 static void vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
 179                                 struct vnt_tx_datahead_g *buf)
 180 {
 181         struct vnt_private *priv = tx_context->priv;
 182         struct ieee80211_hdr *hdr =
 183                                 (struct ieee80211_hdr *)tx_context->skb->data;
 184         u32 frame_len = tx_context->frame_len;
 185         u16 rate = tx_context->tx_rate;
 186
 187         /* Get SignalField,ServiceField,Length */
 188         vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
 189         vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
 190                           PK_TYPE_11B, &buf->b);
 191
 192         /* Get Duration and TimeStamp */
 193         buf->duration_a = hdr->duration_id;
 194         buf->duration_b = hdr->duration_id;
 195         buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
 196         buf->time_stamp_off_b = vnt_time_stamp_off(priv,
 197                                                    priv->top_cck_basic_rate);
 198 }
 199
 200 static void vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
 201                                  struct vnt_tx_datahead_ab *buf)
 202 {
 203         struct vnt_private *priv = tx_context->priv;
 204         struct ieee80211_hdr *hdr =
 205                                 (struct ieee80211_hdr *)tx_context->skb->data;
 206         u32 frame_len = tx_context->frame_len;
 207         u16 rate = tx_context->tx_rate;
 208
 209         /* Get SignalField,ServiceField,Length */
 210         vnt_get_phy_field(priv, frame_len, rate,
 211                           tx_context->pkt_type, &buf->ab);
 212
 213         /* Get Duration and TimeStampOff */
 214         buf->duration = hdr->duration_id;
 215         buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
 216 }
 217
 218 static void vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
 219                                    struct ieee80211_rts *rts, __le16 duration)
 220 {
 221         struct ieee80211_hdr *hdr =
 222                                 (struct ieee80211_hdr *)tx_context->skb->data;
 223
 224         rts->duration = duration;
 225         rts->frame_control =
 226                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
 227
 228         ether_addr_copy(rts->ra, hdr->addr1);
 229         ether_addr_copy(rts->ta, hdr->addr2);
 230 }
 231
 232 static void vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
 233                                 struct vnt_rts_g *buf)
 234 {
 235         struct vnt_private *priv = tx_context->priv;
 236         u16 rts_frame_len = 20;
 237
 238         vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
 239                           PK_TYPE_11B, &buf->b);
 240         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 241                           tx_context->pkt_type, &buf->a);
 242
 243         buf->duration_bb = vnt_get_rts_duration(tx_context);
 244         buf->duration_aa = buf->duration_bb;
 245         buf->duration_ba = buf->duration_bb;
 246
 247         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
 248
 249         vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 250 }
 251
 252 static void vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
 253                                  struct vnt_rts_ab *buf)
 254 {
 255         struct vnt_private *priv = tx_context->priv;
 256         u16 rts_frame_len = 20;
 257
 258         vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
 259                           tx_context->pkt_type, &buf->ab);
 260
 261         buf->duration = vnt_get_rts_duration(tx_context);
 262
 263         vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
 264
 265         vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
 266 }
 267
 268 static void vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
 269                               union vnt_tx_data_head *head)
 270 {
 271         struct vnt_private *priv = tx_context->priv;
 272         struct vnt_cts *buf = &head->cts_g;
 273         u32 cts_frame_len = 14;
 274
 275         /* Get SignalField,ServiceField,Length */
 276         vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
 277                           PK_TYPE_11B, &buf->b);
 278         /* Get CTSDuration_ba */
 279         buf->duration_ba = vnt_get_cts_duration(tx_context);
 280         /*Get CTS Frame body*/
 281         buf->data.duration = buf->duration_ba;
 282         buf->data.frame_control =
 283                 cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
 284
 285         ether_addr_copy(buf->data.ra, priv->current_net_addr);
 286
 287         vnt_rxtx_datahead_g(tx_context, &buf->data_head);
 288 }
 289
 290 /* returns true if mic_hdr is needed */
 291 static bool vnt_fill_txkey(struct vnt_tx_buffer *tx_buffer, struct sk_buff *skb)
 292 {
 293         struct vnt_tx_fifo_head *fifo = &tx_buffer->fifo_head;
 294         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 295         struct ieee80211_key_conf *tx_key = info->control.hw_key;
 296         struct vnt_mic_hdr *mic_hdr;
 297         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
 298         u64 pn64;
 299         u16 payload_len = skb->len;
 300         u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
 301
 302         /* strip header and icv len from payload */
 303         payload_len -= ieee80211_get_hdrlen_from_skb(skb);
 304         payload_len -= tx_key->icv_len;
 305
 306         switch (tx_key->cipher) {
 307         case WLAN_CIPHER_SUITE_WEP40:
 308         case WLAN_CIPHER_SUITE_WEP104:
 309                 memcpy(fifo->tx_key, iv, 3);
 310                 memcpy(fifo->tx_key + 3, tx_key->key, tx_key->keylen);
 311
 312                 if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
 313                         memcpy(fifo->tx_key + 8, iv, 3);
 314                         memcpy(fifo->tx_key + 11,
 315                                tx_key->key, WLAN_KEY_LEN_WEP40);
 316                 }
 317
 318                 fifo->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
 319                 break;
 320         case WLAN_CIPHER_SUITE_TKIP:
 321                 ieee80211_get_tkip_p2k(tx_key, skb, fifo->tx_key);
 322
 323                 fifo->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
 324                 break;
 325         case WLAN_CIPHER_SUITE_CCMP:
 326                 if (info->control.use_cts_prot) {
 327                         if (info->control.use_rts)
 328                                 mic_hdr = &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
 329                         else
 330                                 mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
 331                 } else {
 332                         mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
 333                 }
 334
 335                 mic_hdr->id = 0x59;
 336                 mic_hdr->payload_len = cpu_to_be16(payload_len);
 337                 ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
 338
 339                 pn64 = atomic64_read(&tx_key->tx_pn);
 340                 mic_hdr->ccmp_pn[5] = pn64;
 341                 mic_hdr->ccmp_pn[4] = pn64 >> 8;
 342                 mic_hdr->ccmp_pn[3] = pn64 >> 16;
 343                 mic_hdr->ccmp_pn[2] = pn64 >> 24;
 344                 mic_hdr->ccmp_pn[1] = pn64 >> 32;
 345                 mic_hdr->ccmp_pn[0] = pn64 >> 40;
 346
 347                 if (ieee80211_has_a4(hdr->frame_control))
 348                         mic_hdr->hlen = cpu_to_be16(28);
 349                 else
 350                         mic_hdr->hlen = cpu_to_be16(22);
 351
 352                 ether_addr_copy(mic_hdr->addr1, hdr->addr1);
 353                 ether_addr_copy(mic_hdr->addr2, hdr->addr2);
 354                 ether_addr_copy(mic_hdr->addr3, hdr->addr3);
 355
 356                 mic_hdr->frame_control = cpu_to_le16(le16_to_cpu(hdr->frame_control) & 0xc78f);
 357                 mic_hdr->seq_ctrl = cpu_to_le16(le16_to_cpu(hdr->seq_ctrl) & 0xf);
 358
 359                 if (ieee80211_has_a4(hdr->frame_control))
 360                         ether_addr_copy(mic_hdr->addr4, hdr->addr4);
 361
 362                 memcpy(fifo->tx_key, tx_key->key, WLAN_KEY_LEN_CCMP);
 363
 364                 fifo->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
 365                 return true;
 366         default:
 367                 break;
 368         }
 369
 370         return false;
 371 }
 372
 373 static void vnt_rxtx_rts(struct vnt_usb_send_context *tx_context)
 374 {
 375         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
 376         struct vnt_tx_buffer *tx_buffer = tx_context->tx_buffer;
 377         union vnt_tx_head *tx_head = &tx_buffer->tx_head;
 378         struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
 379         union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
 380
 381         buf->rts_rrv_time_aa = vnt_get_rts_duration(tx_context);
 382         buf->rts_rrv_time_ba = buf->rts_rrv_time_aa;
 383         buf->rts_rrv_time_bb = buf->rts_rrv_time_aa;
 384
 385         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(tx_context);
 386         buf->rrv_time_b = buf->rrv_time_a;
 387
 388         if (info->control.hw_key) {
 389                 if (vnt_fill_txkey(tx_buffer, tx_context->skb))
 390                         head = &tx_head->tx_rts.tx.mic.head;
 391         }
 392
 393         vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
 394 }
 395
 396 static void vnt_rxtx_cts(struct vnt_usb_send_context *tx_context)
 397 {
 398         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
 399         struct vnt_tx_buffer *tx_buffer = tx_context->tx_buffer;
 400         union vnt_tx_head *tx_head = &tx_buffer->tx_head;
 401         struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
 402         union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
 403
 404         buf->rrv_time_a = vnt_rxtx_rsvtime_le16(tx_context);
 405         buf->rrv_time_b = buf->rrv_time_a;
 406
 407         buf->cts_rrv_time_ba = vnt_get_cts_duration(tx_context);
 408
 409         if (info->control.hw_key) {
 410                 if (vnt_fill_txkey(tx_buffer, tx_context->skb))
 411                         head = &tx_head->tx_cts.tx.mic.head;
 412         }
 413
 414         vnt_fill_cts_head(tx_context, head);
 415 }
 416
 417 static void vnt_rxtx_ab(struct vnt_usb_send_context *tx_context)
 418 {
 419         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
 420         struct vnt_tx_buffer *tx_buffer = tx_context->tx_buffer;
 421         union vnt_tx_head *tx_head = &tx_buffer->tx_head;
 422         struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
 423         union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
 424
 425         buf->rrv_time = vnt_rxtx_rsvtime_le16(tx_context);
 426
 427         if (info->control.hw_key) {
 428                 if (vnt_fill_txkey(tx_buffer, tx_context->skb))
 429                         head = &tx_head->tx_ab.tx.mic.head;
 430         }
 431
 432         if (info->control.use_rts) {
 433                 buf->rts_rrv_time = vnt_get_rts_duration(tx_context);
 434
 435                 vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
 436
 437                 return;
 438         }
 439
 440         vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
 441 }
 442
 443 static void vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context)
 444 {
 445         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
 446
 447         if (info->control.use_cts_prot) {
 448                 if (info->control.use_rts) {
 449                         vnt_rxtx_rts(tx_context);
 450
 451                         return;
 452                 }
 453
 454                 vnt_rxtx_cts(tx_context);
 455
 456                 return;
 457         }
 458
 459         vnt_rxtx_ab(tx_context);
 460 }
 461
 462 static u16 vnt_get_hdr_size(struct ieee80211_tx_info *info)
 463 {
 464         u16 size = sizeof(struct vnt_tx_datahead_ab);
 465
 466         if (info->control.use_cts_prot) {
 467                 if (info->control.use_rts)
 468                         size = sizeof(struct vnt_rts_g);
 469                 else
 470                         size = sizeof(struct vnt_cts);
 471         } else if (info->control.use_rts) {
 472                 size = sizeof(struct vnt_rts_ab);
 473         }
 474
 475         if (info->control.hw_key) {
 476                 if (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP)
 477                         size += sizeof(struct vnt_mic_hdr);
 478         }
 479
 480         /* Get rrv_time header */
 481         if (info->control.use_cts_prot) {
 482                 if (info->control.use_rts)
 483                         size += sizeof(struct vnt_rrv_time_rts);
 484                 else
 485                         size += sizeof(struct vnt_rrv_time_cts);
 486         } else {
 487                 size += sizeof(struct vnt_rrv_time_ab);
 488         }
 489
 490         size += sizeof(struct vnt_tx_fifo_head);
 491
 492         return size;
 493 }
 494
 495 int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
 496 {
 497         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 498         struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
 499         struct ieee80211_rate *rate;
 500         struct ieee80211_hdr *hdr;
 501         struct vnt_tx_buffer *tx_buffer;
 502         struct vnt_tx_fifo_head *tx_buffer_head;
 503         struct vnt_usb_send_context *tx_context;
 504         unsigned long flags;
 505         u8 pkt_type;
 506
 507         hdr = (struct ieee80211_hdr *)(skb->data);
 508
 509         rate = ieee80211_get_tx_rate(priv->hw, info);
 510
 511         if (rate->hw_value > RATE_11M) {
 512                 if (info->band == NL80211_BAND_5GHZ) {
 513                         pkt_type = PK_TYPE_11A;
 514                 } else {
 515                         if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 516                                 if (priv->basic_rates & VNT_B_RATES)
 517                                         pkt_type = PK_TYPE_11GB;
 518                                 else
 519                                         pkt_type = PK_TYPE_11GA;
 520                         } else {
 521                                 pkt_type = PK_TYPE_11A;
 522                         }
 523                 }
 524         } else {
 525                 pkt_type = PK_TYPE_11B;
 526         }
 527
 528         spin_lock_irqsave(&priv->lock, flags);
 529
 530         tx_context = vnt_get_free_context(priv);
 531         if (!tx_context) {
 532                 dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
 533                 spin_unlock_irqrestore(&priv->lock, flags);
 534                 return -ENOMEM;
 535         }
 536
 537         tx_context->pkt_type = pkt_type;
 538         tx_context->frame_len = skb->len + 4;
 539         tx_context->tx_rate =  rate->hw_value;
 540
 541         spin_unlock_irqrestore(&priv->lock, flags);
 542
 543         tx_context->skb = skb_clone(skb, GFP_ATOMIC);
 544         if (!tx_context->skb) {
 545                 tx_context->in_use = false;
 546                 return -ENOMEM;
 547         }
 548
 549         tx_buffer = skb_push(skb, vnt_get_hdr_size(info));
 550         tx_context->tx_buffer = tx_buffer;
 551         tx_buffer_head = &tx_buffer->fifo_head;
 552
 553         tx_context->type = CONTEXT_DATA_PACKET;
 554
 555         /*Set fifo controls */
 556         if (pkt_type == PK_TYPE_11A)
 557                 tx_buffer_head->fifo_ctl = 0;
 558         else if (pkt_type == PK_TYPE_11B)
 559                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
 560         else if (pkt_type == PK_TYPE_11GB)
 561                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
 562         else if (pkt_type == PK_TYPE_11GA)
 563                 tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
 564
 565         if (!ieee80211_is_data(hdr->frame_control)) {
 566                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
 567                                                         FIFOCTL_ISDMA0);
 568                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
 569
 570                 tx_buffer_head->time_stamp =
 571                         cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
 572         } else {
 573                 tx_buffer_head->time_stamp =
 574                         cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
 575         }
 576
 577         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
 578                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
 579
 580         if (ieee80211_has_retry(hdr->frame_control))
 581                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
 582
 583         if (info->control.use_rts)
 584                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
 585
 586         if (ieee80211_has_a4(hdr->frame_control))
 587                 tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
 588
 589         tx_buffer_head->frag_ctl =
 590                         cpu_to_le16(ieee80211_hdrlen(hdr->frame_control) << 10);
 591
 592         if (info->control.hw_key)
 593                 tx_context->frame_len += info->control.hw_key->icv_len;
 594
 595         tx_buffer_head->current_rate = cpu_to_le16(rate->hw_value);
 596
 597         vnt_generate_tx_parameter(tx_context);
 598
 599         tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
 600
 601         priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
 602                                                 IEEE80211_SCTL_SEQ) >> 4;
 603
 604         spin_lock_irqsave(&priv->lock, flags);
 605
 606         if (vnt_tx_context(priv, tx_context, skb)) {
 607                 dev_kfree_skb(tx_context->skb);
 608                 spin_unlock_irqrestore(&priv->lock, flags);
 609                 return -EIO;
 610         }
 611
 612         dev_kfree_skb(skb);
 613
 614         spin_unlock_irqrestore(&priv->lock, flags);
 615
 616         return 0;
 617 }
 618
 619 static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb)
 620 {
 621         struct vnt_tx_short_buf_head *short_head;
 622         struct ieee80211_tx_info *info;
 623         struct vnt_usb_send_context *context;
 624         struct ieee80211_mgmt *mgmt_hdr;
 625         unsigned long flags;
 626         u32 frame_size = skb->len + 4;
 627         u16 current_rate;
 628
 629         spin_lock_irqsave(&priv->lock, flags);
 630
 631         context = vnt_get_free_context(priv);
 632         if (!context) {
 633                 dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
 634                 spin_unlock_irqrestore(&priv->lock, flags);
 635                 return -ENOMEM;
 636         }
 637
 638         context->skb = skb;
 639
 640         spin_unlock_irqrestore(&priv->lock, flags);
 641
 642         mgmt_hdr = (struct ieee80211_mgmt *)skb->data;
 643         short_head = skb_push(skb, sizeof(*short_head));
 644
 645         if (priv->bb_type == BB_TYPE_11A) {
 646                 current_rate = RATE_6M;
 647
 648                 /* Get SignalField,ServiceField,Length */
 649                 vnt_get_phy_field(priv, frame_size, current_rate,
 650                                   PK_TYPE_11A, &short_head->ab);
 651
 652                 /* Get TimeStampOff */
 653                 short_head->time_stamp_off =
 654                                 vnt_time_stamp_off(priv, current_rate);
 655         } else {
 656                 current_rate = RATE_1M;
 657                 short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
 658
 659                 /* Get SignalField,ServiceField,Length */
 660                 vnt_get_phy_field(priv, frame_size, current_rate,
 661                                   PK_TYPE_11B, &short_head->ab);
 662
 663                 /* Get TimeStampOff */
 664                 short_head->time_stamp_off =
 665                         vnt_time_stamp_off(priv, current_rate);
 666         }
 667
 668         /* Get Duration */
 669         short_head->duration = mgmt_hdr->duration;
 670
 671         /* time stamp always 0 */
 672         mgmt_hdr->u.beacon.timestamp = 0;
 673
 674         info = IEEE80211_SKB_CB(skb);
 675         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 676                 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
 677
 678                 hdr->duration_id = 0;
 679                 hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
 680         }
 681
 682         priv->seq_counter++;
 683         if (priv->seq_counter > 0x0fff)
 684                 priv->seq_counter = 0;
 685
 686         context->type = CONTEXT_BEACON_PACKET;
 687
 688         spin_lock_irqsave(&priv->lock, flags);
 689
 690         if (vnt_tx_context(priv, context, skb))
 691                 ieee80211_free_txskb(priv->hw, context->skb);
 692
 693         spin_unlock_irqrestore(&priv->lock, flags);
 694
 695         return 0;
 696 }
 697
 698 int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
 699 {
 700         struct sk_buff *beacon;
 701
 702         beacon = ieee80211_beacon_get(priv->hw, vif);
 703         if (!beacon)
 704                 return -ENOMEM;
 705
 706         if (vnt_beacon_xmit(priv, beacon)) {
 707                 ieee80211_free_txskb(priv->hw, beacon);
 708                 return -ENODEV;
 709         }
 710
 711         return 0;
 712 }
 713
 714 int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
 715                       struct ieee80211_bss_conf *conf)
 716 {
 717         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 718
 719         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 720
 721         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
 722
 723         vnt_clear_current_tsf(priv);
 724
 725         vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 726
 727         vnt_reset_next_tbtt(priv, conf->beacon_int);
 728
 729         return vnt_beacon_make(priv, vif);
 730 }