drivers/net/wireless/libertas/cmdresp.c

   1 /**
   2   * This file contains the handling of command
   3   * responses as well as events generated by firmware.
   4   */
   5 #include <linux/delay.h>
   6 #include <linux/if_arp.h>
   7 #include <linux/netdevice.h>
   8
   9 #include <net/iw_handler.h>
  10
  11 #include "host.h"
  12 #include "decl.h"
  13 #include "defs.h"
  14 #include "dev.h"
  15 #include "join.h"
  16 #include "wext.h"
  17
  18 /**
  19  *  @brief This function handles disconnect event. it
  20  *  reports disconnect to upper layer, clean tx/rx packets,
  21  *  reset link state etc.
  22  *
  23  *  @param priv    A pointer to struct lbs_private structure
  24  *  @return        n/a
  25  */
  26 void lbs_mac_event_disconnected(struct lbs_private *priv)
  27 {
  28         union iwreq_data wrqu;
  29
  30         if (priv->connect_status != LBS_CONNECTED)
  31                 return;
  32
  33         lbs_deb_enter(LBS_DEB_ASSOC);
  34
  35         memset(wrqu.ap_addr.sa_data, 0x00, ETH_ALEN);
  36         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
  37
  38         /*
  39          * Cisco AP sends EAP failure and de-auth in less than 0.5 ms.
  40          * It causes problem in the Supplicant
  41          */
  42
  43         msleep_interruptible(1000);
  44         wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
  45
  46         /* report disconnect to upper layer */
  47         netif_stop_queue(priv->dev);
  48         netif_carrier_off(priv->dev);
  49
  50         /* Free Tx and Rx packets */
  51         kfree_skb(priv->currenttxskb);
  52         priv->currenttxskb = NULL;
  53         priv->tx_pending_len = 0;
  54
  55         /* reset SNR/NF/RSSI values */
  56         memset(priv->SNR, 0x00, sizeof(priv->SNR));
  57         memset(priv->NF, 0x00, sizeof(priv->NF));
  58         memset(priv->RSSI, 0x00, sizeof(priv->RSSI));
  59         memset(priv->rawSNR, 0x00, sizeof(priv->rawSNR));
  60         memset(priv->rawNF, 0x00, sizeof(priv->rawNF));
  61         priv->nextSNRNF = 0;
  62         priv->numSNRNF = 0;
  63         priv->connect_status = LBS_DISCONNECTED;
  64
  65         /* Clear out associated SSID and BSSID since connection is
  66          * no longer valid.
  67          */
  68         memset(&priv->curbssparams.bssid, 0, ETH_ALEN);
  69         memset(&priv->curbssparams.ssid, 0, IW_ESSID_MAX_SIZE);
  70         priv->curbssparams.ssid_len = 0;
  71
  72         if (priv->psstate != PS_STATE_FULL_POWER) {
  73                 /* make firmware to exit PS mode */
  74                 lbs_deb_cmd("disconnected, so exit PS mode\n");
  75                 lbs_ps_wakeup(priv, 0);
  76         }
  77         lbs_deb_leave(LBS_DEB_CMD);
  78 }
  79
  80 /**
  81  *  @brief This function handles MIC failure event.
  82  *
  83  *  @param priv    A pointer to struct lbs_private structure
  84  *  @para  event   the event id
  85  *  @return        n/a
  86  */
  87 static void handle_mic_failureevent(struct lbs_private *priv, u32 event)
  88 {
  89         char buf[50];
  90
  91         lbs_deb_enter(LBS_DEB_CMD);
  92         memset(buf, 0, sizeof(buf));
  93
  94         sprintf(buf, "%s", "MLME-MICHAELMICFAILURE.indication ");
  95
  96         if (event == MACREG_INT_CODE_MIC_ERR_UNICAST) {
  97                 strcat(buf, "unicast ");
  98         } else {
  99                 strcat(buf, "multicast ");
 100         }
 101
 102         lbs_send_iwevcustom_event(priv, buf);
 103         lbs_deb_leave(LBS_DEB_CMD);
 104 }
 105
 106 static int lbs_ret_reg_access(struct lbs_private *priv,
 107                                u16 type, struct cmd_ds_command *resp)
 108 {
 109         int ret = 0;
 110
 111         lbs_deb_enter(LBS_DEB_CMD);
 112
 113         switch (type) {
 114         case CMD_RET(CMD_MAC_REG_ACCESS):
 115                 {
 116                         struct cmd_ds_mac_reg_access *reg = &resp->params.macreg;
 117
 118                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
 119                         priv->offsetvalue.value = le32_to_cpu(reg->value);
 120                         break;
 121                 }
 122
 123         case CMD_RET(CMD_BBP_REG_ACCESS):
 124                 {
 125                         struct cmd_ds_bbp_reg_access *reg = &resp->params.bbpreg;
 126
 127                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
 128                         priv->offsetvalue.value = reg->value;
 129                         break;
 130                 }
 131
 132         case CMD_RET(CMD_RF_REG_ACCESS):
 133                 {
 134                         struct cmd_ds_rf_reg_access *reg = &resp->params.rfreg;
 135
 136                         priv->offsetvalue.offset = (u32)le16_to_cpu(reg->offset);
 137                         priv->offsetvalue.value = reg->value;
 138                         break;
 139                 }
 140
 141         default:
 142                 ret = -1;
 143         }
 144
 145         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 146         return ret;
 147 }
 148
 149 static int lbs_ret_802_11_stat(struct lbs_private *priv,
 150                                 struct cmd_ds_command *resp)
 151 {
 152         lbs_deb_enter(LBS_DEB_CMD);
 153 /*      currently priv->wlan802_11Stat is unused
 154
 155         struct cmd_ds_802_11_get_stat *p11Stat = &resp->params.gstat;
 156
 157         // TODO Convert it to Big endian befor copy
 158         memcpy(&priv->wlan802_11Stat,
 159                p11Stat, sizeof(struct cmd_ds_802_11_get_stat));
 160 */
 161         lbs_deb_leave(LBS_DEB_CMD);
 162         return 0;
 163 }
 164
 165 static int lbs_ret_802_11_snmp_mib(struct lbs_private *priv,
 166                                     struct cmd_ds_command *resp)
 167 {
 168         struct cmd_ds_802_11_snmp_mib *smib = &resp->params.smib;
 169         u16 oid = le16_to_cpu(smib->oid);
 170         u16 querytype = le16_to_cpu(smib->querytype);
 171
 172         lbs_deb_enter(LBS_DEB_CMD);
 173
 174         lbs_deb_cmd("SNMP_RESP: oid 0x%x, querytype 0x%x\n", oid,
 175                querytype);
 176         lbs_deb_cmd("SNMP_RESP: Buf size %d\n", le16_to_cpu(smib->bufsize));
 177
 178         if (querytype == CMD_ACT_GET) {
 179                 switch (oid) {
 180                 case FRAGTHRESH_I:
 181                         priv->fragthsd =
 182                                 le16_to_cpu(*((__le16 *)(smib->value)));
 183                         lbs_deb_cmd("SNMP_RESP: frag threshold %u\n",
 184                                     priv->fragthsd);
 185                         break;
 186                 case RTSTHRESH_I:
 187                         priv->rtsthsd =
 188                                 le16_to_cpu(*((__le16 *)(smib->value)));
 189                         lbs_deb_cmd("SNMP_RESP: rts threshold %u\n",
 190                                     priv->rtsthsd);
 191                         break;
 192                 case SHORT_RETRYLIM_I:
 193                         priv->txretrycount =
 194                                 le16_to_cpu(*((__le16 *)(smib->value)));
 195                         lbs_deb_cmd("SNMP_RESP: tx retry count %u\n",
 196                                     priv->rtsthsd);
 197                         break;
 198                 default:
 199                         break;
 200                 }
 201         }
 202
 203         lbs_deb_enter(LBS_DEB_CMD);
 204         return 0;
 205 }
 206
 207 static int lbs_ret_802_11_key_material(struct lbs_private *priv,
 208                                         struct cmd_ds_command *resp)
 209 {
 210         struct cmd_ds_802_11_key_material *pkeymaterial =
 211             &resp->params.keymaterial;
 212         u16 action = le16_to_cpu(pkeymaterial->action);
 213
 214         lbs_deb_enter(LBS_DEB_CMD);
 215
 216         /* Copy the returned key to driver private data */
 217         if (action == CMD_ACT_GET) {
 218                 u8 * buf_ptr = (u8 *) &pkeymaterial->keyParamSet;
 219                 u8 * resp_end = (u8 *) (resp + le16_to_cpu(resp->size));
 220
 221                 while (buf_ptr < resp_end) {
 222                         struct MrvlIEtype_keyParamSet * pkeyparamset =
 223                             (struct MrvlIEtype_keyParamSet *) buf_ptr;
 224                         struct enc_key * pkey;
 225                         u16 param_set_len = le16_to_cpu(pkeyparamset->length);
 226                         u16 key_len = le16_to_cpu(pkeyparamset->keylen);
 227                         u16 key_flags = le16_to_cpu(pkeyparamset->keyinfo);
 228                         u16 key_type = le16_to_cpu(pkeyparamset->keytypeid);
 229                         u8 * end;
 230
 231                         end = (u8 *) pkeyparamset + sizeof (pkeyparamset->type)
 232                                                   + sizeof (pkeyparamset->length)
 233                                                   + param_set_len;
 234                         /* Make sure we don't access past the end of the IEs */
 235                         if (end > resp_end)
 236                                 break;
 237
 238                         if (key_flags & KEY_INFO_WPA_UNICAST)
 239                                 pkey = &priv->wpa_unicast_key;
 240                         else if (key_flags & KEY_INFO_WPA_MCAST)
 241                                 pkey = &priv->wpa_mcast_key;
 242                         else
 243                                 break;
 244
 245                         /* Copy returned key into driver */
 246                         memset(pkey, 0, sizeof(struct enc_key));
 247                         if (key_len > sizeof(pkey->key))
 248                                 break;
 249                         pkey->type = key_type;
 250                         pkey->flags = key_flags;
 251                         pkey->len = key_len;
 252                         memcpy(pkey->key, pkeyparamset->key, pkey->len);
 253
 254                         buf_ptr = end + 1;
 255                 }
 256         }
 257
 258         lbs_deb_enter(LBS_DEB_CMD);
 259         return 0;
 260 }
 261
 262 static int lbs_ret_802_11_mac_address(struct lbs_private *priv,
 263                                        struct cmd_ds_command *resp)
 264 {
 265         struct cmd_ds_802_11_mac_address *macadd = &resp->params.macadd;
 266
 267         lbs_deb_enter(LBS_DEB_CMD);
 268
 269         memcpy(priv->current_addr, macadd->macadd, ETH_ALEN);
 270
 271         lbs_deb_enter(LBS_DEB_CMD);
 272         return 0;
 273 }
 274
 275 static int lbs_ret_802_11_rf_tx_power(struct lbs_private *priv,
 276                                        struct cmd_ds_command *resp)
 277 {
 278         struct cmd_ds_802_11_rf_tx_power *rtp = &resp->params.txp;
 279
 280         lbs_deb_enter(LBS_DEB_CMD);
 281
 282         priv->txpowerlevel = le16_to_cpu(rtp->currentlevel);
 283
 284         lbs_deb_cmd("TX power currently %d\n", priv->txpowerlevel);
 285
 286         lbs_deb_leave(LBS_DEB_CMD);
 287         return 0;
 288 }
 289
 290 static int lbs_ret_802_11_rate_adapt_rateset(struct lbs_private *priv,
 291                                               struct cmd_ds_command *resp)
 292 {
 293         struct cmd_ds_802_11_rate_adapt_rateset *rates = &resp->params.rateset;
 294
 295         lbs_deb_enter(LBS_DEB_CMD);
 296
 297         if (rates->action == CMD_ACT_GET) {
 298                 priv->enablehwauto = le16_to_cpu(rates->enablehwauto);
 299                 priv->ratebitmap = le16_to_cpu(rates->bitmap);
 300         }
 301
 302         lbs_deb_leave(LBS_DEB_CMD);
 303         return 0;
 304 }
 305
 306 static int lbs_ret_802_11_rssi(struct lbs_private *priv,
 307                                 struct cmd_ds_command *resp)
 308 {
 309         struct cmd_ds_802_11_rssi_rsp *rssirsp = &resp->params.rssirsp;
 310
 311         lbs_deb_enter(LBS_DEB_CMD);
 312
 313         /* store the non average value */
 314         priv->SNR[TYPE_BEACON][TYPE_NOAVG] = le16_to_cpu(rssirsp->SNR);
 315         priv->NF[TYPE_BEACON][TYPE_NOAVG] = le16_to_cpu(rssirsp->noisefloor);
 316
 317         priv->SNR[TYPE_BEACON][TYPE_AVG] = le16_to_cpu(rssirsp->avgSNR);
 318         priv->NF[TYPE_BEACON][TYPE_AVG] = le16_to_cpu(rssirsp->avgnoisefloor);
 319
 320         priv->RSSI[TYPE_BEACON][TYPE_NOAVG] =
 321             CAL_RSSI(priv->SNR[TYPE_BEACON][TYPE_NOAVG],
 322                      priv->NF[TYPE_BEACON][TYPE_NOAVG]);
 323
 324         priv->RSSI[TYPE_BEACON][TYPE_AVG] =
 325             CAL_RSSI(priv->SNR[TYPE_BEACON][TYPE_AVG] / AVG_SCALE,
 326                      priv->NF[TYPE_BEACON][TYPE_AVG] / AVG_SCALE);
 327
 328         lbs_deb_cmd("RSSI: beacon %d, avg %d\n",
 329                priv->RSSI[TYPE_BEACON][TYPE_NOAVG],
 330                priv->RSSI[TYPE_BEACON][TYPE_AVG]);
 331
 332         lbs_deb_leave(LBS_DEB_CMD);
 333         return 0;
 334 }
 335
 336 static int lbs_ret_802_11_eeprom_access(struct lbs_private *priv,
 337                                   struct cmd_ds_command *resp)
 338 {
 339         struct lbs_ioctl_regrdwr *pbuf;
 340         pbuf = (struct lbs_ioctl_regrdwr *) priv->prdeeprom;
 341
 342         lbs_deb_enter_args(LBS_DEB_CMD, "len %d",
 343                le16_to_cpu(resp->params.rdeeprom.bytecount));
 344         if (pbuf->NOB < le16_to_cpu(resp->params.rdeeprom.bytecount)) {
 345                 pbuf->NOB = 0;
 346                 lbs_deb_cmd("EEPROM read length too big\n");
 347                 return -1;
 348         }
 349         pbuf->NOB = le16_to_cpu(resp->params.rdeeprom.bytecount);
 350         if (pbuf->NOB > 0) {
 351
 352                 memcpy(&pbuf->value, (u8 *) & resp->params.rdeeprom.value,
 353                        le16_to_cpu(resp->params.rdeeprom.bytecount));
 354                 lbs_deb_hex(LBS_DEB_CMD, "EEPROM", (char *)&pbuf->value,
 355                         le16_to_cpu(resp->params.rdeeprom.bytecount));
 356         }
 357         lbs_deb_leave(LBS_DEB_CMD);
 358         return 0;
 359 }
 360
 361 static int lbs_ret_get_log(struct lbs_private *priv,
 362                             struct cmd_ds_command *resp)
 363 {
 364         struct cmd_ds_802_11_get_log *logmessage = &resp->params.glog;
 365
 366         lbs_deb_enter(LBS_DEB_CMD);
 367
 368         /* Stored little-endian */
 369         memcpy(&priv->logmsg, logmessage, sizeof(struct cmd_ds_802_11_get_log));
 370
 371         lbs_deb_leave(LBS_DEB_CMD);
 372         return 0;
 373 }
 374
 375 static int lbs_ret_802_11_bcn_ctrl(struct lbs_private * priv,
 376                                         struct cmd_ds_command *resp)
 377 {
 378         struct cmd_ds_802_11_beacon_control *bcn_ctrl =
 379             &resp->params.bcn_ctrl;
 380
 381         lbs_deb_enter(LBS_DEB_CMD);
 382
 383         if (bcn_ctrl->action == CMD_ACT_GET) {
 384                 priv->beacon_enable = (u8) le16_to_cpu(bcn_ctrl->beacon_enable);
 385                 priv->beacon_period = le16_to_cpu(bcn_ctrl->beacon_period);
 386         }
 387
 388         lbs_deb_enter(LBS_DEB_CMD);
 389         return 0;
 390 }
 391
 392 static inline int handle_cmd_response(struct lbs_private *priv,
 393                                       unsigned long dummy,
 394                                       struct cmd_header *cmd_response)
 395 {
 396         struct cmd_ds_command *resp = (struct cmd_ds_command *) cmd_response;
 397         int ret = 0;
 398         unsigned long flags;
 399         uint16_t respcmd = le16_to_cpu(resp->command);
 400
 401         lbs_deb_enter(LBS_DEB_HOST);
 402
 403         switch (respcmd) {
 404         case CMD_RET(CMD_MAC_REG_ACCESS):
 405         case CMD_RET(CMD_BBP_REG_ACCESS):
 406         case CMD_RET(CMD_RF_REG_ACCESS):
 407                 ret = lbs_ret_reg_access(priv, respcmd, resp);
 408                 break;
 409
 410         case CMD_RET(CMD_802_11_SCAN):
 411                 ret = lbs_ret_80211_scan(priv, resp);
 412                 break;
 413
 414         case CMD_RET(CMD_802_11_GET_LOG):
 415                 ret = lbs_ret_get_log(priv, resp);
 416                 break;
 417
 418         case CMD_RET_802_11_ASSOCIATE:
 419         case CMD_RET(CMD_802_11_ASSOCIATE):
 420         case CMD_RET(CMD_802_11_REASSOCIATE):
 421                 ret = lbs_ret_80211_associate(priv, resp);
 422                 break;
 423
 424         case CMD_RET(CMD_802_11_DISASSOCIATE):
 425         case CMD_RET(CMD_802_11_DEAUTHENTICATE):
 426                 ret = lbs_ret_80211_disassociate(priv, resp);
 427                 break;
 428
 429         case CMD_RET(CMD_802_11_AD_HOC_START):
 430         case CMD_RET(CMD_802_11_AD_HOC_JOIN):
 431                 ret = lbs_ret_80211_ad_hoc_start(priv, resp);
 432                 break;
 433
 434         case CMD_RET(CMD_802_11_GET_STAT):
 435                 ret = lbs_ret_802_11_stat(priv, resp);
 436                 break;
 437
 438         case CMD_RET(CMD_802_11_SNMP_MIB):
 439                 ret = lbs_ret_802_11_snmp_mib(priv, resp);
 440                 break;
 441
 442         case CMD_RET(CMD_802_11_RF_TX_POWER):
 443                 ret = lbs_ret_802_11_rf_tx_power(priv, resp);
 444                 break;
 445
 446         case CMD_RET(CMD_802_11_SET_AFC):
 447         case CMD_RET(CMD_802_11_GET_AFC):
 448                 spin_lock_irqsave(&priv->driver_lock, flags);
 449                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.afc,
 450                         sizeof(struct cmd_ds_802_11_afc));
 451                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 452
 453                 break;
 454
 455         case CMD_RET(CMD_MAC_MULTICAST_ADR):
 456         case CMD_RET(CMD_MAC_CONTROL):
 457         case CMD_RET(CMD_802_11_RESET):
 458         case CMD_RET(CMD_802_11_AUTHENTICATE):
 459         case CMD_RET(CMD_802_11_BEACON_STOP):
 460                 break;
 461
 462         case CMD_RET(CMD_802_11_RATE_ADAPT_RATESET):
 463                 ret = lbs_ret_802_11_rate_adapt_rateset(priv, resp);
 464                 break;
 465
 466         case CMD_RET(CMD_802_11_RSSI):
 467                 ret = lbs_ret_802_11_rssi(priv, resp);
 468                 break;
 469
 470         case CMD_RET(CMD_802_11_MAC_ADDRESS):
 471                 ret = lbs_ret_802_11_mac_address(priv, resp);
 472                 break;
 473
 474         case CMD_RET(CMD_802_11_AD_HOC_STOP):
 475                 ret = lbs_ret_80211_ad_hoc_stop(priv, resp);
 476                 break;
 477
 478         case CMD_RET(CMD_802_11_KEY_MATERIAL):
 479                 ret = lbs_ret_802_11_key_material(priv, resp);
 480                 break;
 481
 482         case CMD_RET(CMD_802_11_EEPROM_ACCESS):
 483                 ret = lbs_ret_802_11_eeprom_access(priv, resp);
 484                 break;
 485
 486         case CMD_RET(CMD_802_11D_DOMAIN_INFO):
 487                 ret = lbs_ret_802_11d_domain_info(priv, resp);
 488                 break;
 489
 490         case CMD_RET(CMD_802_11_TPC_CFG):
 491                 spin_lock_irqsave(&priv->driver_lock, flags);
 492                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.tpccfg,
 493                         sizeof(struct cmd_ds_802_11_tpc_cfg));
 494                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 495                 break;
 496         case CMD_RET(CMD_802_11_LED_GPIO_CTRL):
 497                 spin_lock_irqsave(&priv->driver_lock, flags);
 498                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.ledgpio,
 499                         sizeof(struct cmd_ds_802_11_led_ctrl));
 500                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 501                 break;
 502
 503         case CMD_RET(CMD_802_11_PWR_CFG):
 504                 spin_lock_irqsave(&priv->driver_lock, flags);
 505                 memmove((void *)priv->cur_cmd->callback_arg, &resp->params.pwrcfg,
 506                         sizeof(struct cmd_ds_802_11_pwr_cfg));
 507                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 508
 509                 break;
 510
 511         case CMD_RET(CMD_GET_TSF):
 512                 spin_lock_irqsave(&priv->driver_lock, flags);
 513                 memcpy((void *)priv->cur_cmd->callback_arg,
 514                        &resp->params.gettsf.tsfvalue, sizeof(u64));
 515                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 516                 break;
 517         case CMD_RET(CMD_BT_ACCESS):
 518                 spin_lock_irqsave(&priv->driver_lock, flags);
 519                 if (priv->cur_cmd->callback_arg)
 520                         memcpy((void *)priv->cur_cmd->callback_arg,
 521                                &resp->params.bt.addr1, 2 * ETH_ALEN);
 522                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 523                 break;
 524         case CMD_RET(CMD_FWT_ACCESS):
 525                 spin_lock_irqsave(&priv->driver_lock, flags);
 526                 if (priv->cur_cmd->callback_arg)
 527                         memcpy((void *)priv->cur_cmd->callback_arg, &resp->params.fwt,
 528                                sizeof(resp->params.fwt));
 529                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 530                 break;
 531         case CMD_RET(CMD_802_11_BEACON_CTRL):
 532                 ret = lbs_ret_802_11_bcn_ctrl(priv, resp);
 533                 break;
 534
 535         default:
 536                 lbs_deb_host("CMD_RESP: unknown cmd response 0x%04x\n",
 537                              le16_to_cpu(resp->command));
 538                 break;
 539         }
 540         lbs_deb_leave(LBS_DEB_HOST);
 541         return ret;
 542 }
 543
 544 int lbs_process_rx_command(struct lbs_private *priv)
 545 {
 546         uint16_t respcmd, curcmd;
 547         struct cmd_header *resp;
 548         int ret = 0;
 549         unsigned long flags;
 550         uint16_t result;
 551
 552         lbs_deb_enter(LBS_DEB_HOST);
 553
 554         mutex_lock(&priv->lock);
 555         spin_lock_irqsave(&priv->driver_lock, flags);
 556
 557         if (!priv->cur_cmd) {
 558                 lbs_deb_host("CMD_RESP: cur_cmd is NULL\n");
 559                 ret = -1;
 560                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 561                 goto done;
 562         }
 563
 564         resp = (void *)priv->upld_buf;
 565
 566         curcmd = le16_to_cpu(resp->command);
 567
 568         respcmd = le16_to_cpu(resp->command);
 569         result = le16_to_cpu(resp->result);
 570
 571         lbs_deb_host("CMD_RESP: response 0x%04x, seq %d, size %d, jiffies %lu\n",
 572                      respcmd, le16_to_cpu(resp->seqnum), priv->upld_len, jiffies);
 573         lbs_deb_hex(LBS_DEB_HOST, "CMD_RESP", (void *) resp, priv->upld_len);
 574
 575         if (resp->seqnum != priv->cur_cmd->cmdbuf->seqnum) {
 576                 lbs_pr_info("Received CMD_RESP with invalid sequence %d (expected %d)\n",
 577                             le16_to_cpu(resp->seqnum), le16_to_cpu(priv->cur_cmd->cmdbuf->seqnum));
 578                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 579                 ret = -1;
 580                 goto done;
 581         }
 582         if (respcmd != CMD_RET(curcmd) &&
 583             respcmd != CMD_802_11_ASSOCIATE && curcmd != CMD_RET_802_11_ASSOCIATE) {
 584                 lbs_pr_info("Invalid CMD_RESP %x to command %x!\n", respcmd, curcmd);
 585                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 586                 ret = -1;
 587                 goto done;
 588         }
 589
 590         if (resp->result == cpu_to_le16(0x0004)) {
 591                 /* 0x0004 means -EAGAIN. Drop the response, let it time out
 592                    and be resubmitted */
 593                 lbs_pr_info("Firmware returns DEFER to command %x. Will let it time out...\n",
 594                             le16_to_cpu(resp->command));
 595                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 596                 ret = -1;
 597                 goto done;
 598         }
 599
 600         /* Now we got response from FW, cancel the command timer */
 601         del_timer(&priv->command_timer);
 602         priv->cmd_timed_out = 0;
 603         if (priv->nr_retries) {
 604                 lbs_pr_info("Received result %x to command %x after %d retries\n",
 605                             result, curcmd, priv->nr_retries);
 606                 priv->nr_retries = 0;
 607         }
 608
 609         /* Store the response code to cur_cmd_retcode. */
 610         priv->cur_cmd_retcode = result;
 611
 612         if (respcmd == CMD_RET(CMD_802_11_PS_MODE)) {
 613                 struct cmd_ds_802_11_ps_mode *psmode = (void *) &resp[1];
 614                 u16 action = le16_to_cpu(psmode->action);
 615
 616                 lbs_deb_host(
 617                        "CMD_RESP: PS_MODE cmd reply result 0x%x, action 0x%x\n",
 618                        result, action);
 619
 620                 if (result) {
 621                         lbs_deb_host("CMD_RESP: PS command failed with 0x%x\n",
 622                                     result);
 623                         /*
 624                          * We should not re-try enter-ps command in
 625                          * ad-hoc mode. It takes place in
 626                          * lbs_execute_next_command().
 627                          */
 628                         if (priv->mode == IW_MODE_ADHOC &&
 629                             action == CMD_SUBCMD_ENTER_PS)
 630                                 priv->psmode = LBS802_11POWERMODECAM;
 631                 } else if (action == CMD_SUBCMD_ENTER_PS) {
 632                         priv->needtowakeup = 0;
 633                         priv->psstate = PS_STATE_AWAKE;
 634
 635                         lbs_deb_host("CMD_RESP: ENTER_PS command response\n");
 636                         if (priv->connect_status != LBS_CONNECTED) {
 637                                 /*
 638                                  * When Deauth Event received before Enter_PS command
 639                                  * response, We need to wake up the firmware.
 640                                  */
 641                                 lbs_deb_host(
 642                                        "disconnected, invoking lbs_ps_wakeup\n");
 643
 644                                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 645                                 mutex_unlock(&priv->lock);
 646                                 lbs_ps_wakeup(priv, 0);
 647                                 mutex_lock(&priv->lock);
 648                                 spin_lock_irqsave(&priv->driver_lock, flags);
 649                         }
 650                 } else if (action == CMD_SUBCMD_EXIT_PS) {
 651                         priv->needtowakeup = 0;
 652                         priv->psstate = PS_STATE_FULL_POWER;
 653                         lbs_deb_host("CMD_RESP: EXIT_PS command response\n");
 654                 } else {
 655                         lbs_deb_host("CMD_RESP: PS action 0x%X\n", action);
 656                 }
 657
 658                 lbs_complete_command(priv, priv->cur_cmd, result);
 659                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 660
 661                 ret = 0;
 662                 goto done;
 663         }
 664
 665         /* If the command is not successful, cleanup and return failure */
 666         if ((result != 0 || !(respcmd & 0x8000))) {
 667                 lbs_deb_host("CMD_RESP: error 0x%04x in command reply 0x%04x\n",
 668                        result, respcmd);
 669                 /*
 670                  * Handling errors here
 671                  */
 672                 switch (respcmd) {
 673                 case CMD_RET(CMD_GET_HW_SPEC):
 674                 case CMD_RET(CMD_802_11_RESET):
 675                         lbs_deb_host("CMD_RESP: reset failed\n");
 676                         break;
 677
 678                 }
 679                 lbs_complete_command(priv, priv->cur_cmd, result);
 680                 spin_unlock_irqrestore(&priv->driver_lock, flags);
 681
 682                 ret = -1;
 683                 goto done;
 684         }
 685
 686         spin_unlock_irqrestore(&priv->driver_lock, flags);
 687
 688         if (priv->cur_cmd && priv->cur_cmd->callback) {
 689                 ret = priv->cur_cmd->callback(priv, priv->cur_cmd->callback_arg,
 690                                 resp);
 691         } else
 692                 ret = handle_cmd_response(priv, 0, resp);
 693
 694         spin_lock_irqsave(&priv->driver_lock, flags);
 695
 696         if (priv->cur_cmd) {
 697                 /* Clean up and Put current command back to cmdfreeq */
 698                 lbs_complete_command(priv, priv->cur_cmd, result);
 699         }
 700         spin_unlock_irqrestore(&priv->driver_lock, flags);
 701
 702 done:
 703         mutex_unlock(&priv->lock);
 704         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
 705         return ret;
 706 }
 707
 708 static int lbs_send_confirmwake(struct lbs_private *priv)
 709 {
 710         struct cmd_header *cmd = &priv->lbs_ps_confirm_wake;
 711         int ret = 0;
 712
 713         lbs_deb_enter(LBS_DEB_HOST);
 714
 715         cmd->command = cpu_to_le16(CMD_802_11_WAKEUP_CONFIRM);
 716         cmd->size = cpu_to_le16(sizeof(*cmd));
 717         cmd->seqnum = cpu_to_le16(++priv->seqnum);
 718         cmd->result = 0;
 719
 720         lbs_deb_host("SEND_WAKEC_CMD: before download\n");
 721
 722         lbs_deb_hex(LBS_DEB_HOST, "wake confirm command", (void *)cmd, sizeof(*cmd));
 723
 724         ret = priv->hw_host_to_card(priv, MVMS_CMD, (void *)cmd, sizeof(*cmd));
 725         if (ret)
 726                 lbs_pr_alert("SEND_WAKEC_CMD: Host to Card failed for Confirm Wake\n");
 727
 728         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
 729         return ret;
 730 }
 731
 732 int lbs_process_event(struct lbs_private *priv)
 733 {
 734         int ret = 0;
 735         u32 eventcause;
 736
 737         lbs_deb_enter(LBS_DEB_CMD);
 738
 739         spin_lock_irq(&priv->driver_lock);
 740         eventcause = priv->eventcause >> SBI_EVENT_CAUSE_SHIFT;
 741         spin_unlock_irq(&priv->driver_lock);
 742
 743         lbs_deb_cmd("event cause %d\n", eventcause);
 744
 745         switch (eventcause) {
 746         case MACREG_INT_CODE_LINK_SENSED:
 747                 lbs_deb_cmd("EVENT: MACREG_INT_CODE_LINK_SENSED\n");
 748                 break;
 749
 750         case MACREG_INT_CODE_DEAUTHENTICATED:
 751                 lbs_deb_cmd("EVENT: deauthenticated\n");
 752                 lbs_mac_event_disconnected(priv);
 753                 break;
 754
 755         case MACREG_INT_CODE_DISASSOCIATED:
 756                 lbs_deb_cmd("EVENT: disassociated\n");
 757                 lbs_mac_event_disconnected(priv);
 758                 break;
 759
 760         case MACREG_INT_CODE_LINK_LOST_NO_SCAN:
 761                 lbs_deb_cmd("EVENT: link lost\n");
 762                 lbs_mac_event_disconnected(priv);
 763                 break;
 764
 765         case MACREG_INT_CODE_PS_SLEEP:
 766                 lbs_deb_cmd("EVENT: sleep\n");
 767
 768                 /* handle unexpected PS SLEEP event */
 769                 if (priv->psstate == PS_STATE_FULL_POWER) {
 770                         lbs_deb_cmd(
 771                                "EVENT: in FULL POWER mode, ignoreing PS_SLEEP\n");
 772                         break;
 773                 }
 774                 priv->psstate = PS_STATE_PRE_SLEEP;
 775
 776                 lbs_ps_confirm_sleep(priv, (u16) priv->psmode);
 777
 778                 break;
 779
 780         case MACREG_INT_CODE_HOST_AWAKE:
 781                 lbs_deb_cmd("EVENT: HOST_AWAKE\n");
 782                 lbs_send_confirmwake(priv);
 783                 break;
 784
 785         case MACREG_INT_CODE_PS_AWAKE:
 786                 lbs_deb_cmd("EVENT: awake\n");
 787                 /* handle unexpected PS AWAKE event */
 788                 if (priv->psstate == PS_STATE_FULL_POWER) {
 789                         lbs_deb_cmd(
 790                                "EVENT: In FULL POWER mode - ignore PS AWAKE\n");
 791                         break;
 792                 }
 793
 794                 priv->psstate = PS_STATE_AWAKE;
 795
 796                 if (priv->needtowakeup) {
 797                         /*
 798                          * wait for the command processing to finish
 799                          * before resuming sending
 800                          * priv->needtowakeup will be set to FALSE
 801                          * in lbs_ps_wakeup()
 802                          */
 803                         lbs_deb_cmd("waking up ...\n");
 804                         lbs_ps_wakeup(priv, 0);
 805                 }
 806                 break;
 807
 808         case MACREG_INT_CODE_MIC_ERR_UNICAST:
 809                 lbs_deb_cmd("EVENT: UNICAST MIC ERROR\n");
 810                 handle_mic_failureevent(priv, MACREG_INT_CODE_MIC_ERR_UNICAST);
 811                 break;
 812
 813         case MACREG_INT_CODE_MIC_ERR_MULTICAST:
 814                 lbs_deb_cmd("EVENT: MULTICAST MIC ERROR\n");
 815                 handle_mic_failureevent(priv, MACREG_INT_CODE_MIC_ERR_MULTICAST);
 816                 break;
 817         case MACREG_INT_CODE_MIB_CHANGED:
 818         case MACREG_INT_CODE_INIT_DONE:
 819                 break;
 820
 821         case MACREG_INT_CODE_ADHOC_BCN_LOST:
 822                 lbs_deb_cmd("EVENT: ADHOC beacon lost\n");
 823                 break;
 824
 825         case MACREG_INT_CODE_RSSI_LOW:
 826                 lbs_pr_alert("EVENT: rssi low\n");
 827                 break;
 828         case MACREG_INT_CODE_SNR_LOW:
 829                 lbs_pr_alert("EVENT: snr low\n");
 830                 break;
 831         case MACREG_INT_CODE_MAX_FAIL:
 832                 lbs_pr_alert("EVENT: max fail\n");
 833                 break;
 834         case MACREG_INT_CODE_RSSI_HIGH:
 835                 lbs_pr_alert("EVENT: rssi high\n");
 836                 break;
 837         case MACREG_INT_CODE_SNR_HIGH:
 838                 lbs_pr_alert("EVENT: snr high\n");
 839                 break;
 840
 841         case MACREG_INT_CODE_MESH_AUTO_STARTED:
 842                 /* Ignore spurious autostart events if autostart is disabled */
 843                 if (!priv->mesh_autostart_enabled) {
 844                         lbs_pr_info("EVENT: MESH_AUTO_STARTED (ignoring)\n");
 845                         break;
 846                 }
 847                 lbs_pr_info("EVENT: MESH_AUTO_STARTED\n");
 848                 priv->mesh_connect_status = LBS_CONNECTED;
 849                 if (priv->mesh_open) {
 850                         netif_carrier_on(priv->mesh_dev);
 851                         if (!priv->tx_pending_len)
 852                                 netif_wake_queue(priv->mesh_dev);
 853                 }
 854                 priv->mode = IW_MODE_ADHOC;
 855                 schedule_work(&priv->sync_channel);
 856                 break;
 857
 858         default:
 859                 lbs_pr_alert("EVENT: unknown event id %d\n", eventcause);
 860                 break;
 861         }
 862
 863         spin_lock_irq(&priv->driver_lock);
 864         priv->eventcause = 0;
 865         spin_unlock_irq(&priv->driver_lock);
 866
 867         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 868         return ret;
 869 }