drivers/net/wireless/libertas/cmd.c

   1 /**
   2   * This file contains the handling of command.
   3   * It prepares command and sends it to firmware when it is ready.
   4   */
   5
   6 #include <linux/kfifo.h>
   7 #include <linux/sched.h>
   8 #include <linux/slab.h>
   9 #include <linux/if_arp.h>
  10
  11 #include "decl.h"
  12 #include "cfg.h"
  13 #include "cmd.h"
  14
  15 #define CAL_NF(nf)              ((s32)(-(s32)(nf)))
  16 #define CAL_RSSI(snr, nf)       ((s32)((s32)(snr) + CAL_NF(nf)))
  17
  18 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv);
  19
  20 /**
  21  *  @brief Simple callback that copies response back into command
  22  *
  23  *  @param priv         A pointer to struct lbs_private structure
  24  *  @param extra        A pointer to the original command structure for which
  25  *                      'resp' is a response
  26  *  @param resp         A pointer to the command response
  27  *
  28  *  @return             0 on success, error on failure
  29  */
  30 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  31                      struct cmd_header *resp)
  32 {
  33         struct cmd_header *buf = (void *)extra;
  34         uint16_t copy_len;
  35
  36         copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  37         memcpy(buf, resp, copy_len);
  38         return 0;
  39 }
  40 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  41
  42 /**
  43  *  @brief Simple callback that ignores the result. Use this if
  44  *  you just want to send a command to the hardware, but don't
  45  *  care for the result.
  46  *
  47  *  @param priv         ignored
  48  *  @param extra        ignored
  49  *  @param resp         ignored
  50  *
  51  *  @return             0 for success
  52  */
  53 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  54                      struct cmd_header *resp)
  55 {
  56         return 0;
  57 }
  58
  59
  60 /**
  61  *  @brief Checks whether a command is allowed in Power Save mode
  62  *
  63  *  @param command the command ID
  64  *  @return        1 if allowed, 0 if not allowed
  65  */
  66 static u8 is_command_allowed_in_ps(u16 cmd)
  67 {
  68         switch (cmd) {
  69         case CMD_802_11_RSSI:
  70                 return 1;
  71         case CMD_802_11_HOST_SLEEP_CFG:
  72                 return 1;
  73         default:
  74                 break;
  75         }
  76         return 0;
  77 }
  78
  79 /**
  80  *  @brief This function checks if the command is allowed.
  81  *
  82  *  @param priv         A pointer to lbs_private structure
  83  *  @return             allowed or not allowed.
  84  */
  85
  86 static int lbs_is_cmd_allowed(struct lbs_private *priv)
  87 {
  88         int ret = 1;
  89
  90         lbs_deb_enter(LBS_DEB_CMD);
  91
  92         if (!priv->is_auto_deep_sleep_enabled) {
  93                 if (priv->is_deep_sleep) {
  94                         lbs_deb_cmd("command not allowed in deep sleep\n");
  95                         ret = 0;
  96                 }
  97         }
  98
  99         lbs_deb_leave(LBS_DEB_CMD);
 100         return ret;
 101 }
 102
 103 /**
 104  *  @brief Updates the hardware details like MAC address and regulatory region
 105  *
 106  *  @param priv         A pointer to struct lbs_private structure
 107  *
 108  *  @return             0 on success, error on failure
 109  */
 110 int lbs_update_hw_spec(struct lbs_private *priv)
 111 {
 112         struct cmd_ds_get_hw_spec cmd;
 113         int ret = -1;
 114         u32 i;
 115
 116         lbs_deb_enter(LBS_DEB_CMD);
 117
 118         memset(&cmd, 0, sizeof(cmd));
 119         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 120         memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
 121         ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
 122         if (ret)
 123                 goto out;
 124
 125         priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 126
 127         /* The firmware release is in an interesting format: the patch
 128          * level is in the most significant nibble ... so fix that: */
 129         priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 130         priv->fwrelease = (priv->fwrelease << 8) |
 131                 (priv->fwrelease >> 24 & 0xff);
 132
 133         /* Some firmware capabilities:
 134          * CF card    firmware 5.0.16p0:   cap 0x00000303
 135          * USB dongle firmware 5.110.17p2: cap 0x00000303
 136          */
 137         lbs_pr_info("%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 138                 cmd.permanentaddr,
 139                 priv->fwrelease >> 24 & 0xff,
 140                 priv->fwrelease >> 16 & 0xff,
 141                 priv->fwrelease >>  8 & 0xff,
 142                 priv->fwrelease       & 0xff,
 143                 priv->fwcapinfo);
 144         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 145                     cmd.hwifversion, cmd.version);
 146
 147         /* Clamp region code to 8-bit since FW spec indicates that it should
 148          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 149          * returns non-zero high 8 bits here.
 150          *
 151          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 152          * need to check for this problem and handle it properly.
 153          */
 154         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 155                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 156         else
 157                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 158
 159         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 160                 /* use the region code to search for the index */
 161                 if (priv->regioncode == lbs_region_code_to_index[i])
 162                         break;
 163         }
 164
 165         /* if it's unidentified region code, use the default (USA) */
 166         if (i >= MRVDRV_MAX_REGION_CODE) {
 167                 priv->regioncode = 0x10;
 168                 lbs_pr_info("unidentified region code; using the default (USA)\n");
 169         }
 170
 171         if (priv->current_addr[0] == 0xff)
 172                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 173
 174         memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 175         if (priv->mesh_dev)
 176                 memcpy(priv->mesh_dev->dev_addr, priv->current_addr, ETH_ALEN);
 177
 178 out:
 179         lbs_deb_leave(LBS_DEB_CMD);
 180         return ret;
 181 }
 182
 183 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
 184                         struct cmd_header *resp)
 185 {
 186         lbs_deb_enter(LBS_DEB_CMD);
 187         if (priv->is_host_sleep_activated) {
 188                 priv->is_host_sleep_configured = 0;
 189                 if (priv->psstate == PS_STATE_FULL_POWER) {
 190                         priv->is_host_sleep_activated = 0;
 191                         wake_up_interruptible(&priv->host_sleep_q);
 192                 }
 193         } else {
 194                 priv->is_host_sleep_configured = 1;
 195         }
 196         lbs_deb_leave(LBS_DEB_CMD);
 197         return 0;
 198 }
 199
 200 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 201                 struct wol_config *p_wol_config)
 202 {
 203         struct cmd_ds_host_sleep cmd_config;
 204         int ret;
 205
 206         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 207         cmd_config.criteria = cpu_to_le32(criteria);
 208         cmd_config.gpio = priv->wol_gpio;
 209         cmd_config.gap = priv->wol_gap;
 210
 211         if (p_wol_config != NULL)
 212                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 213                                 sizeof(struct wol_config));
 214         else
 215                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 216
 217         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
 218                         le16_to_cpu(cmd_config.hdr.size),
 219                         lbs_ret_host_sleep_cfg, 0);
 220         if (!ret) {
 221                 if (p_wol_config)
 222                         memcpy((uint8_t *) p_wol_config,
 223                                         (uint8_t *)&cmd_config.wol_conf,
 224                                         sizeof(struct wol_config));
 225         } else {
 226                 lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
 227         }
 228
 229         return ret;
 230 }
 231 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 232
 233 static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
 234                                    u16 cmd_action)
 235 {
 236         struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
 237
 238         lbs_deb_enter(LBS_DEB_CMD);
 239
 240         cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
 241         cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
 242                                 sizeof(struct cmd_header));
 243         psm->action = cpu_to_le16(cmd_action);
 244         psm->multipledtim = 0;
 245         switch (cmd_action) {
 246         case CMD_SUBCMD_ENTER_PS:
 247                 lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
 248
 249                 psm->locallisteninterval = 0;
 250                 psm->nullpktinterval = 0;
 251                 psm->multipledtim =
 252                     cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
 253                 break;
 254
 255         case CMD_SUBCMD_EXIT_PS:
 256                 lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
 257                 break;
 258
 259         case CMD_SUBCMD_SLEEP_CONFIRMED:
 260                 lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
 261                 break;
 262
 263         default:
 264                 break;
 265         }
 266
 267         lbs_deb_leave(LBS_DEB_CMD);
 268         return 0;
 269 }
 270
 271 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 272                                 struct sleep_params *sp)
 273 {
 274         struct cmd_ds_802_11_sleep_params cmd;
 275         int ret;
 276
 277         lbs_deb_enter(LBS_DEB_CMD);
 278
 279         if (cmd_action == CMD_ACT_GET) {
 280                 memset(&cmd, 0, sizeof(cmd));
 281         } else {
 282                 cmd.error = cpu_to_le16(sp->sp_error);
 283                 cmd.offset = cpu_to_le16(sp->sp_offset);
 284                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 285                 cmd.calcontrol = sp->sp_calcontrol;
 286                 cmd.externalsleepclk = sp->sp_extsleepclk;
 287                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 288         }
 289         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 290         cmd.action = cpu_to_le16(cmd_action);
 291
 292         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 293
 294         if (!ret) {
 295                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 296                             "calcontrol 0x%x extsleepclk 0x%x\n",
 297                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 298                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 299                             cmd.externalsleepclk);
 300
 301                 sp->sp_error = le16_to_cpu(cmd.error);
 302                 sp->sp_offset = le16_to_cpu(cmd.offset);
 303                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 304                 sp->sp_calcontrol = cmd.calcontrol;
 305                 sp->sp_extsleepclk = cmd.externalsleepclk;
 306                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 307         }
 308
 309         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 310         return 0;
 311 }
 312
 313 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 314 {
 315         int ret = 0;
 316
 317         lbs_deb_enter(LBS_DEB_CMD);
 318
 319         if (priv->is_deep_sleep) {
 320                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 321                                         !priv->is_deep_sleep, (10 * HZ))) {
 322                         lbs_pr_err("ds_awake_q: timer expired\n");
 323                         ret = -1;
 324                 }
 325         }
 326
 327         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 328         return ret;
 329 }
 330
 331 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 332 {
 333         int ret =  0;
 334
 335         lbs_deb_enter(LBS_DEB_CMD);
 336
 337         if (deep_sleep) {
 338                 if (priv->is_deep_sleep != 1) {
 339                         lbs_deb_cmd("deep sleep: sleep\n");
 340                         BUG_ON(!priv->enter_deep_sleep);
 341                         ret = priv->enter_deep_sleep(priv);
 342                         if (!ret) {
 343                                 netif_stop_queue(priv->dev);
 344                                 netif_carrier_off(priv->dev);
 345                         }
 346                 } else {
 347                         lbs_pr_err("deep sleep: already enabled\n");
 348                 }
 349         } else {
 350                 if (priv->is_deep_sleep) {
 351                         lbs_deb_cmd("deep sleep: wakeup\n");
 352                         BUG_ON(!priv->exit_deep_sleep);
 353                         ret = priv->exit_deep_sleep(priv);
 354                         if (!ret) {
 355                                 ret = lbs_wait_for_ds_awake(priv);
 356                                 if (ret)
 357                                         lbs_pr_err("deep sleep: wakeup"
 358                                                         "failed\n");
 359                         }
 360                 }
 361         }
 362
 363         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 364         return ret;
 365 }
 366
 367 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
 368                 unsigned long dummy,
 369                 struct cmd_header *cmd)
 370 {
 371         lbs_deb_enter(LBS_DEB_FW);
 372         priv->is_host_sleep_activated = 1;
 373         wake_up_interruptible(&priv->host_sleep_q);
 374         lbs_deb_leave(LBS_DEB_FW);
 375         return 0;
 376 }
 377
 378 int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
 379 {
 380         struct cmd_header cmd;
 381         int ret = 0;
 382         uint32_t criteria = EHS_REMOVE_WAKEUP;
 383
 384         lbs_deb_enter(LBS_DEB_CMD);
 385
 386         if (host_sleep) {
 387                 if (priv->is_host_sleep_activated != 1) {
 388                         memset(&cmd, 0, sizeof(cmd));
 389                         ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
 390                                         (struct wol_config *)NULL);
 391                         if (ret) {
 392                                 lbs_pr_info("Host sleep configuration failed: "
 393                                                 "%d\n", ret);
 394                                 return ret;
 395                         }
 396                         if (priv->psstate == PS_STATE_FULL_POWER) {
 397                                 ret = __lbs_cmd(priv,
 398                                                 CMD_802_11_HOST_SLEEP_ACTIVATE,
 399                                                 &cmd,
 400                                                 sizeof(cmd),
 401                                                 lbs_ret_host_sleep_activate, 0);
 402                                 if (ret)
 403                                         lbs_pr_info("HOST_SLEEP_ACTIVATE "
 404                                                         "failed: %d\n", ret);
 405                         }
 406
 407                         if (!wait_event_interruptible_timeout(
 408                                                 priv->host_sleep_q,
 409                                                 priv->is_host_sleep_activated,
 410                                                 (10 * HZ))) {
 411                                 lbs_pr_err("host_sleep_q: timer expired\n");
 412                                 ret = -1;
 413                         }
 414                 } else {
 415                         lbs_pr_err("host sleep: already enabled\n");
 416                 }
 417         } else {
 418                 if (priv->is_host_sleep_activated)
 419                         ret = lbs_host_sleep_cfg(priv, criteria,
 420                                         (struct wol_config *)NULL);
 421         }
 422
 423         return ret;
 424 }
 425
 426 /**
 427  *  @brief Set an SNMP MIB value
 428  *
 429  *  @param priv         A pointer to struct lbs_private structure
 430  *  @param oid          The OID to set in the firmware
 431  *  @param val          Value to set the OID to
 432  *
 433  *  @return             0 on success, error on failure
 434  */
 435 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 436 {
 437         struct cmd_ds_802_11_snmp_mib cmd;
 438         int ret;
 439
 440         lbs_deb_enter(LBS_DEB_CMD);
 441
 442         memset(&cmd, 0, sizeof (cmd));
 443         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 444         cmd.action = cpu_to_le16(CMD_ACT_SET);
 445         cmd.oid = cpu_to_le16((u16) oid);
 446
 447         switch (oid) {
 448         case SNMP_MIB_OID_BSS_TYPE:
 449                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 450                 cmd.value[0] = val;
 451                 break;
 452         case SNMP_MIB_OID_11D_ENABLE:
 453         case SNMP_MIB_OID_FRAG_THRESHOLD:
 454         case SNMP_MIB_OID_RTS_THRESHOLD:
 455         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 456         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 457                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 458                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 459                 break;
 460         default:
 461                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 462                 ret = -EINVAL;
 463                 goto out;
 464         }
 465
 466         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 467                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 468
 469         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 470
 471 out:
 472         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 473         return ret;
 474 }
 475
 476 /**
 477  *  @brief Get an SNMP MIB value
 478  *
 479  *  @param priv         A pointer to struct lbs_private structure
 480  *  @param oid          The OID to retrieve from the firmware
 481  *  @param out_val      Location for the returned value
 482  *
 483  *  @return             0 on success, error on failure
 484  */
 485 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 486 {
 487         struct cmd_ds_802_11_snmp_mib cmd;
 488         int ret;
 489
 490         lbs_deb_enter(LBS_DEB_CMD);
 491
 492         memset(&cmd, 0, sizeof (cmd));
 493         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 494         cmd.action = cpu_to_le16(CMD_ACT_GET);
 495         cmd.oid = cpu_to_le16(oid);
 496
 497         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 498         if (ret)
 499                 goto out;
 500
 501         switch (le16_to_cpu(cmd.bufsize)) {
 502         case sizeof(u8):
 503                 *out_val = cmd.value[0];
 504                 break;
 505         case sizeof(u16):
 506                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 507                 break;
 508         default:
 509                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 510                             oid, le16_to_cpu(cmd.bufsize));
 511                 break;
 512         }
 513
 514 out:
 515         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 516         return ret;
 517 }
 518
 519 /**
 520  *  @brief Get the min, max, and current TX power
 521  *
 522  *  @param priv         A pointer to struct lbs_private structure
 523  *  @param curlevel     Current power level in dBm
 524  *  @param minlevel     Minimum supported power level in dBm (optional)
 525  *  @param maxlevel     Maximum supported power level in dBm (optional)
 526  *
 527  *  @return             0 on success, error on failure
 528  */
 529 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 530                      s16 *maxlevel)
 531 {
 532         struct cmd_ds_802_11_rf_tx_power cmd;
 533         int ret;
 534
 535         lbs_deb_enter(LBS_DEB_CMD);
 536
 537         memset(&cmd, 0, sizeof(cmd));
 538         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 539         cmd.action = cpu_to_le16(CMD_ACT_GET);
 540
 541         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 542         if (ret == 0) {
 543                 *curlevel = le16_to_cpu(cmd.curlevel);
 544                 if (minlevel)
 545                         *minlevel = cmd.minlevel;
 546                 if (maxlevel)
 547                         *maxlevel = cmd.maxlevel;
 548         }
 549
 550         lbs_deb_leave(LBS_DEB_CMD);
 551         return ret;
 552 }
 553
 554 /**
 555  *  @brief Set the TX power
 556  *
 557  *  @param priv         A pointer to struct lbs_private structure
 558  *  @param dbm          The desired power level in dBm
 559  *
 560  *  @return             0 on success, error on failure
 561  */
 562 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 563 {
 564         struct cmd_ds_802_11_rf_tx_power cmd;
 565         int ret;
 566
 567         lbs_deb_enter(LBS_DEB_CMD);
 568
 569         memset(&cmd, 0, sizeof(cmd));
 570         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 571         cmd.action = cpu_to_le16(CMD_ACT_SET);
 572         cmd.curlevel = cpu_to_le16(dbm);
 573
 574         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 575
 576         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 577
 578         lbs_deb_leave(LBS_DEB_CMD);
 579         return ret;
 580 }
 581
 582 /**
 583  *  @brief Enable or disable monitor mode (only implemented on OLPC usb8388 FW)
 584  *
 585  *  @param priv        A pointer to struct lbs_private structure
 586  *  @param enable      1 to enable monitor mode, 0 to disable
 587  *
 588  *  @return            0 on success, error on failure
 589  */
 590 int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
 591 {
 592         struct cmd_ds_802_11_monitor_mode cmd;
 593         int ret;
 594
 595         memset(&cmd, 0, sizeof(cmd));
 596         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 597         cmd.action = cpu_to_le16(CMD_ACT_SET);
 598         if (enable)
 599                 cmd.mode = cpu_to_le16(0x1);
 600
 601         lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
 602
 603         ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
 604         if (ret == 0) {
 605                 priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
 606                                                 ARPHRD_ETHER;
 607         }
 608
 609         lbs_deb_leave(LBS_DEB_CMD);
 610         return ret;
 611 }
 612
 613 /**
 614  *  @brief Get the radio channel
 615  *
 616  *  @param priv         A pointer to struct lbs_private structure
 617  *
 618  *  @return             The channel on success, error on failure
 619  */
 620 static int lbs_get_channel(struct lbs_private *priv)
 621 {
 622         struct cmd_ds_802_11_rf_channel cmd;
 623         int ret = 0;
 624
 625         lbs_deb_enter(LBS_DEB_CMD);
 626
 627         memset(&cmd, 0, sizeof(cmd));
 628         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 629         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 630
 631         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 632         if (ret)
 633                 goto out;
 634
 635         ret = le16_to_cpu(cmd.channel);
 636         lbs_deb_cmd("current radio channel is %d\n", ret);
 637
 638 out:
 639         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 640         return ret;
 641 }
 642
 643 int lbs_update_channel(struct lbs_private *priv)
 644 {
 645         int ret;
 646
 647         /* the channel in f/w could be out of sync; get the current channel */
 648         lbs_deb_enter(LBS_DEB_ASSOC);
 649
 650         ret = lbs_get_channel(priv);
 651         if (ret > 0) {
 652                 priv->channel = ret;
 653                 ret = 0;
 654         }
 655         lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
 656         return ret;
 657 }
 658
 659 /**
 660  *  @brief Set the radio channel
 661  *
 662  *  @param priv         A pointer to struct lbs_private structure
 663  *  @param channel      The desired channel, or 0 to clear a locked channel
 664  *
 665  *  @return             0 on success, error on failure
 666  */
 667 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 668 {
 669         struct cmd_ds_802_11_rf_channel cmd;
 670 #ifdef DEBUG
 671         u8 old_channel = priv->channel;
 672 #endif
 673         int ret = 0;
 674
 675         lbs_deb_enter(LBS_DEB_CMD);
 676
 677         memset(&cmd, 0, sizeof(cmd));
 678         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 679         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 680         cmd.channel = cpu_to_le16(channel);
 681
 682         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 683         if (ret)
 684                 goto out;
 685
 686         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 687         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 688                 priv->channel);
 689
 690 out:
 691         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 692         return ret;
 693 }
 694
 695 /**
 696  *  @brief Get current RSSI and noise floor
 697  *
 698  *  @param priv         A pointer to struct lbs_private structure
 699  *  @param rssi         On successful return, signal level in mBm
 700  *
 701  *  @return             The channel on success, error on failure
 702  */
 703 int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
 704 {
 705         struct cmd_ds_802_11_rssi cmd;
 706         int ret = 0;
 707
 708         lbs_deb_enter(LBS_DEB_CMD);
 709
 710         BUG_ON(rssi == NULL);
 711         BUG_ON(nf == NULL);
 712
 713         memset(&cmd, 0, sizeof(cmd));
 714         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 715         /* Average SNR over last 8 beacons */
 716         cmd.n_or_snr = cpu_to_le16(8);
 717
 718         ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
 719         if (ret == 0) {
 720                 *nf = CAL_NF(le16_to_cpu(cmd.nf));
 721                 *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
 722         }
 723
 724         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 725         return ret;
 726 }
 727
 728 /**
 729  *  @brief Send regulatory and 802.11d domain information to the firmware
 730  *
 731  *  @param priv         pointer to struct lbs_private
 732  *  @param request      cfg80211 regulatory request structure
 733  *  @param bands        the device's supported bands and channels
 734  *
 735  *  @return             0 on success, error code on failure
 736 */
 737 int lbs_set_11d_domain_info(struct lbs_private *priv,
 738                             struct regulatory_request *request,
 739                             struct ieee80211_supported_band **bands)
 740 {
 741         struct cmd_ds_802_11d_domain_info cmd;
 742         struct mrvl_ie_domain_param_set *domain = &cmd.domain;
 743         struct ieee80211_country_ie_triplet *t;
 744         enum ieee80211_band band;
 745         struct ieee80211_channel *ch;
 746         u8 num_triplet = 0;
 747         u8 num_parsed_chan = 0;
 748         u8 first_channel = 0, next_chan = 0, max_pwr = 0;
 749         u8 i, flag = 0;
 750         size_t triplet_size;
 751         int ret;
 752
 753         lbs_deb_enter(LBS_DEB_11D);
 754
 755         memset(&cmd, 0, sizeof(cmd));
 756         cmd.action = cpu_to_le16(CMD_ACT_SET);
 757
 758         lbs_deb_11d("Setting country code '%c%c'\n",
 759                     request->alpha2[0], request->alpha2[1]);
 760
 761         domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 762
 763         /* Set country code */
 764         domain->country_code[0] = request->alpha2[0];
 765         domain->country_code[1] = request->alpha2[1];
 766         domain->country_code[2] = ' ';
 767
 768         /* Now set up the channel triplets; firmware is somewhat picky here
 769          * and doesn't validate channel numbers and spans; hence it would
 770          * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
 771          * the last 3 aren't valid channels, the driver is responsible for
 772          * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
 773          * etc.
 774          */
 775         for (band = 0;
 776              (band < IEEE80211_NUM_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
 777              band++) {
 778
 779                 if (!bands[band])
 780                         continue;
 781
 782                 for (i = 0;
 783                      (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
 784                      i++) {
 785                         ch = &bands[band]->channels[i];
 786                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 787                                 continue;
 788
 789                         if (!flag) {
 790                                 flag = 1;
 791                                 next_chan = first_channel = (u32) ch->hw_value;
 792                                 max_pwr = ch->max_power;
 793                                 num_parsed_chan = 1;
 794                                 continue;
 795                         }
 796
 797                         if ((ch->hw_value == next_chan + 1) &&
 798                                         (ch->max_power == max_pwr)) {
 799                                 /* Consolidate adjacent channels */
 800                                 next_chan++;
 801                                 num_parsed_chan++;
 802                         } else {
 803                                 /* Add this triplet */
 804                                 lbs_deb_11d("11D triplet (%d, %d, %d)\n",
 805                                         first_channel, num_parsed_chan,
 806                                         max_pwr);
 807                                 t = &domain->triplet[num_triplet];
 808                                 t->chans.first_channel = first_channel;
 809                                 t->chans.num_channels = num_parsed_chan;
 810                                 t->chans.max_power = max_pwr;
 811                                 num_triplet++;
 812                                 flag = 0;
 813                         }
 814                 }
 815
 816                 if (flag) {
 817                         /* Add last triplet */
 818                         lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
 819                                 num_parsed_chan, max_pwr);
 820                         t = &domain->triplet[num_triplet];
 821                         t->chans.first_channel = first_channel;
 822                         t->chans.num_channels = num_parsed_chan;
 823                         t->chans.max_power = max_pwr;
 824                         num_triplet++;
 825                 }
 826         }
 827
 828         lbs_deb_11d("# triplets %d\n", num_triplet);
 829
 830         /* Set command header sizes */
 831         triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
 832         domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
 833                                         triplet_size);
 834
 835         lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
 836                         (u8 *) &cmd.domain.country_code,
 837                         le16_to_cpu(domain->header.len));
 838
 839         cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
 840                                    sizeof(cmd.action) +
 841                                    sizeof(cmd.domain.header) +
 842                                    sizeof(cmd.domain.country_code) +
 843                                    triplet_size);
 844
 845         ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
 846
 847         lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
 848         return ret;
 849 }
 850
 851 static int lbs_cmd_reg_access(struct cmd_ds_command *cmdptr,
 852                                u8 cmd_action, void *pdata_buf)
 853 {
 854         struct lbs_offset_value *offval;
 855
 856         lbs_deb_enter(LBS_DEB_CMD);
 857
 858         offval = (struct lbs_offset_value *)pdata_buf;
 859
 860         switch (le16_to_cpu(cmdptr->command)) {
 861         case CMD_MAC_REG_ACCESS:
 862                 {
 863                         struct cmd_ds_mac_reg_access *macreg;
 864
 865                         cmdptr->size =
 866                             cpu_to_le16(sizeof (struct cmd_ds_mac_reg_access)
 867                                         + sizeof(struct cmd_header));
 868                         macreg =
 869                             (struct cmd_ds_mac_reg_access *)&cmdptr->params.
 870                             macreg;
 871
 872                         macreg->action = cpu_to_le16(cmd_action);
 873                         macreg->offset = cpu_to_le16((u16) offval->offset);
 874                         macreg->value = cpu_to_le32(offval->value);
 875
 876                         break;
 877                 }
 878
 879         case CMD_BBP_REG_ACCESS:
 880                 {
 881                         struct cmd_ds_bbp_reg_access *bbpreg;
 882
 883                         cmdptr->size =
 884                             cpu_to_le16(sizeof
 885                                              (struct cmd_ds_bbp_reg_access)
 886                                              + sizeof(struct cmd_header));
 887                         bbpreg =
 888                             (struct cmd_ds_bbp_reg_access *)&cmdptr->params.
 889                             bbpreg;
 890
 891                         bbpreg->action = cpu_to_le16(cmd_action);
 892                         bbpreg->offset = cpu_to_le16((u16) offval->offset);
 893                         bbpreg->value = (u8) offval->value;
 894
 895                         break;
 896                 }
 897
 898         case CMD_RF_REG_ACCESS:
 899                 {
 900                         struct cmd_ds_rf_reg_access *rfreg;
 901
 902                         cmdptr->size =
 903                             cpu_to_le16(sizeof
 904                                              (struct cmd_ds_rf_reg_access) +
 905                                              sizeof(struct cmd_header));
 906                         rfreg =
 907                             (struct cmd_ds_rf_reg_access *)&cmdptr->params.
 908                             rfreg;
 909
 910                         rfreg->action = cpu_to_le16(cmd_action);
 911                         rfreg->offset = cpu_to_le16((u16) offval->offset);
 912                         rfreg->value = (u8) offval->value;
 913
 914                         break;
 915                 }
 916
 917         default:
 918                 break;
 919         }
 920
 921         lbs_deb_leave(LBS_DEB_CMD);
 922         return 0;
 923 }
 924
 925 static void lbs_queue_cmd(struct lbs_private *priv,
 926                           struct cmd_ctrl_node *cmdnode)
 927 {
 928         unsigned long flags;
 929         int addtail = 1;
 930
 931         lbs_deb_enter(LBS_DEB_HOST);
 932
 933         if (!cmdnode) {
 934                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 935                 goto done;
 936         }
 937         if (!cmdnode->cmdbuf->size) {
 938                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 939                 goto done;
 940         }
 941         cmdnode->result = 0;
 942
 943         /* Exit_PS command needs to be queued in the header always. */
 944         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 945                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf[1];
 946
 947                 if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
 948                         if (priv->psstate != PS_STATE_FULL_POWER)
 949                                 addtail = 0;
 950                 }
 951         }
 952
 953         if (le16_to_cpu(cmdnode->cmdbuf->command) ==
 954                         CMD_802_11_WAKEUP_CONFIRM)
 955                 addtail = 0;
 956
 957         spin_lock_irqsave(&priv->driver_lock, flags);
 958
 959         if (addtail)
 960                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 961         else
 962                 list_add(&cmdnode->list, &priv->cmdpendingq);
 963
 964         spin_unlock_irqrestore(&priv->driver_lock, flags);
 965
 966         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 967                      le16_to_cpu(cmdnode->cmdbuf->command));
 968
 969 done:
 970         lbs_deb_leave(LBS_DEB_HOST);
 971 }
 972
 973 static void lbs_submit_command(struct lbs_private *priv,
 974                                struct cmd_ctrl_node *cmdnode)
 975 {
 976         unsigned long flags;
 977         struct cmd_header *cmd;
 978         uint16_t cmdsize;
 979         uint16_t command;
 980         int timeo = 3 * HZ;
 981         int ret;
 982
 983         lbs_deb_enter(LBS_DEB_HOST);
 984
 985         cmd = cmdnode->cmdbuf;
 986
 987         spin_lock_irqsave(&priv->driver_lock, flags);
 988         priv->cur_cmd = cmdnode;
 989         priv->cur_cmd_retcode = 0;
 990         spin_unlock_irqrestore(&priv->driver_lock, flags);
 991
 992         cmdsize = le16_to_cpu(cmd->size);
 993         command = le16_to_cpu(cmd->command);
 994
 995         /* These commands take longer */
 996         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 997                 timeo = 5 * HZ;
 998
 999         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
1000                      command, le16_to_cpu(cmd->seqnum), cmdsize);
1001         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
1002
1003         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
1004
1005         if (ret) {
1006                 lbs_pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
1007                 /* Let the timer kick in and retry, and potentially reset
1008                    the whole thing if the condition persists */
1009                 timeo = HZ/4;
1010         }
1011
1012         if (command == CMD_802_11_DEEP_SLEEP) {
1013                 if (priv->is_auto_deep_sleep_enabled) {
1014                         priv->wakeup_dev_required = 1;
1015                         priv->dnld_sent = 0;
1016                 }
1017                 priv->is_deep_sleep = 1;
1018                 lbs_complete_command(priv, cmdnode, 0);
1019         } else {
1020                 /* Setup the timer after transmit command */
1021                 mod_timer(&priv->command_timer, jiffies + timeo);
1022         }
1023
1024         lbs_deb_leave(LBS_DEB_HOST);
1025 }
1026
1027 /**
1028  *  This function inserts command node to cmdfreeq
1029  *  after cleans it. Requires priv->driver_lock held.
1030  */
1031 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1032                                          struct cmd_ctrl_node *cmdnode)
1033 {
1034         lbs_deb_enter(LBS_DEB_HOST);
1035
1036         if (!cmdnode)
1037                 goto out;
1038
1039         cmdnode->callback = NULL;
1040         cmdnode->callback_arg = 0;
1041
1042         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
1043
1044         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
1045  out:
1046         lbs_deb_leave(LBS_DEB_HOST);
1047 }
1048
1049 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1050         struct cmd_ctrl_node *ptempcmd)
1051 {
1052         unsigned long flags;
1053
1054         spin_lock_irqsave(&priv->driver_lock, flags);
1055         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1056         spin_unlock_irqrestore(&priv->driver_lock, flags);
1057 }
1058
1059 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1060                           int result)
1061 {
1062         if (cmd == priv->cur_cmd)
1063                 priv->cur_cmd_retcode = result;
1064
1065         cmd->result = result;
1066         cmd->cmdwaitqwoken = 1;
1067         wake_up_interruptible(&cmd->cmdwait_q);
1068
1069         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1070                 __lbs_cleanup_and_insert_cmd(priv, cmd);
1071         priv->cur_cmd = NULL;
1072 }
1073
1074 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1075 {
1076         struct cmd_ds_802_11_radio_control cmd;
1077         int ret = -EINVAL;
1078
1079         lbs_deb_enter(LBS_DEB_CMD);
1080
1081         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1082         cmd.action = cpu_to_le16(CMD_ACT_SET);
1083
1084         /* Only v8 and below support setting the preamble */
1085         if (priv->fwrelease < 0x09000000) {
1086                 switch (preamble) {
1087                 case RADIO_PREAMBLE_SHORT:
1088                 case RADIO_PREAMBLE_AUTO:
1089                 case RADIO_PREAMBLE_LONG:
1090                         cmd.control = cpu_to_le16(preamble);
1091                         break;
1092                 default:
1093                         goto out;
1094                 }
1095         }
1096
1097         if (radio_on)
1098                 cmd.control |= cpu_to_le16(0x1);
1099         else {
1100                 cmd.control &= cpu_to_le16(~0x1);
1101                 priv->txpower_cur = 0;
1102         }
1103
1104         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1105                     radio_on ? "ON" : "OFF", preamble);
1106
1107         priv->radio_on = radio_on;
1108
1109         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1110
1111 out:
1112         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
1113         return ret;
1114 }
1115
1116 void lbs_set_mac_control(struct lbs_private *priv)
1117 {
1118         struct cmd_ds_mac_control cmd;
1119
1120         lbs_deb_enter(LBS_DEB_CMD);
1121
1122         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1123         cmd.action = cpu_to_le16(priv->mac_control);
1124         cmd.reserved = 0;
1125
1126         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1127
1128         lbs_deb_leave(LBS_DEB_CMD);
1129 }
1130
1131 /**
1132  *  @brief This function prepare the command before send to firmware.
1133  *
1134  *  @param priv         A pointer to struct lbs_private structure
1135  *  @param cmd_no       command number
1136  *  @param cmd_action   command action: GET or SET
1137  *  @param wait_option  wait option: wait response or not
1138  *  @param cmd_oid      cmd oid: treated as sub command
1139  *  @param pdata_buf    A pointer to informaion buffer
1140  *  @return             0 or -1
1141  */
1142 int lbs_prepare_and_send_command(struct lbs_private *priv,
1143                           u16 cmd_no,
1144                           u16 cmd_action,
1145                           u16 wait_option, u32 cmd_oid, void *pdata_buf)
1146 {
1147         int ret = 0;
1148         struct cmd_ctrl_node *cmdnode;
1149         struct cmd_ds_command *cmdptr;
1150         unsigned long flags;
1151
1152         lbs_deb_enter(LBS_DEB_HOST);
1153
1154         if (!priv) {
1155                 lbs_deb_host("PREP_CMD: priv is NULL\n");
1156                 ret = -1;
1157                 goto done;
1158         }
1159
1160         if (priv->surpriseremoved) {
1161                 lbs_deb_host("PREP_CMD: card removed\n");
1162                 ret = -1;
1163                 goto done;
1164         }
1165
1166         if (!lbs_is_cmd_allowed(priv)) {
1167                 ret = -EBUSY;
1168                 goto done;
1169         }
1170
1171         cmdnode = lbs_get_cmd_ctrl_node(priv);
1172
1173         if (cmdnode == NULL) {
1174                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1175
1176                 /* Wake up main thread to execute next command */
1177                 wake_up_interruptible(&priv->waitq);
1178                 ret = -1;
1179                 goto done;
1180         }
1181
1182         cmdnode->callback = NULL;
1183         cmdnode->callback_arg = (unsigned long)pdata_buf;
1184
1185         cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
1186
1187         lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
1188
1189         /* Set sequence number, command and INT option */
1190         priv->seqnum++;
1191         cmdptr->seqnum = cpu_to_le16(priv->seqnum);
1192
1193         cmdptr->command = cpu_to_le16(cmd_no);
1194         cmdptr->result = 0;
1195
1196         switch (cmd_no) {
1197         case CMD_802_11_PS_MODE:
1198                 ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
1199                 break;
1200
1201         case CMD_MAC_REG_ACCESS:
1202         case CMD_BBP_REG_ACCESS:
1203         case CMD_RF_REG_ACCESS:
1204                 ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
1205                 break;
1206
1207         case CMD_802_11_SET_AFC:
1208         case CMD_802_11_GET_AFC:
1209
1210                 cmdptr->command = cpu_to_le16(cmd_no);
1211                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
1212                                            sizeof(struct cmd_header));
1213
1214                 memmove(&cmdptr->params.afc,
1215                         pdata_buf, sizeof(struct cmd_ds_802_11_afc));
1216
1217                 ret = 0;
1218                 goto done;
1219
1220         case CMD_802_11_TPC_CFG:
1221                 cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
1222                 cmdptr->size =
1223                     cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
1224                                      sizeof(struct cmd_header));
1225
1226                 memmove(&cmdptr->params.tpccfg,
1227                         pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
1228
1229                 ret = 0;
1230                 break;
1231
1232 #ifdef CONFIG_LIBERTAS_MESH
1233
1234         case CMD_BT_ACCESS:
1235                 ret = lbs_cmd_bt_access(cmdptr, cmd_action, pdata_buf);
1236                 break;
1237
1238         case CMD_FWT_ACCESS:
1239                 ret = lbs_cmd_fwt_access(cmdptr, cmd_action, pdata_buf);
1240                 break;
1241
1242 #endif
1243
1244         case CMD_802_11_BEACON_CTRL:
1245                 ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
1246                 break;
1247         case CMD_802_11_DEEP_SLEEP:
1248                 cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
1249                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
1250                 break;
1251         default:
1252                 lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
1253                 ret = -1;
1254                 break;
1255         }
1256
1257         /* return error, since the command preparation failed */
1258         if (ret != 0) {
1259                 lbs_deb_host("PREP_CMD: command preparation failed\n");
1260                 lbs_cleanup_and_insert_cmd(priv, cmdnode);
1261                 ret = -1;
1262                 goto done;
1263         }
1264
1265         cmdnode->cmdwaitqwoken = 0;
1266
1267         lbs_queue_cmd(priv, cmdnode);
1268         wake_up_interruptible(&priv->waitq);
1269
1270         if (wait_option & CMD_OPTION_WAITFORRSP) {
1271                 lbs_deb_host("PREP_CMD: wait for response\n");
1272                 might_sleep();
1273                 wait_event_interruptible(cmdnode->cmdwait_q,
1274                                          cmdnode->cmdwaitqwoken);
1275         }
1276
1277         spin_lock_irqsave(&priv->driver_lock, flags);
1278         if (priv->cur_cmd_retcode) {
1279                 lbs_deb_host("PREP_CMD: command failed with return code %d\n",
1280                        priv->cur_cmd_retcode);
1281                 priv->cur_cmd_retcode = 0;
1282                 ret = -1;
1283         }
1284         spin_unlock_irqrestore(&priv->driver_lock, flags);
1285
1286 done:
1287         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1288         return ret;
1289 }
1290
1291 /**
1292  *  @brief This function allocates the command buffer and link
1293  *  it to command free queue.
1294  *
1295  *  @param priv         A pointer to struct lbs_private structure
1296  *  @return             0 or -1
1297  */
1298 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1299 {
1300         int ret = 0;
1301         u32 bufsize;
1302         u32 i;
1303         struct cmd_ctrl_node *cmdarray;
1304
1305         lbs_deb_enter(LBS_DEB_HOST);
1306
1307         /* Allocate and initialize the command array */
1308         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1309         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1310                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1311                 ret = -1;
1312                 goto done;
1313         }
1314         priv->cmd_array = cmdarray;
1315
1316         /* Allocate and initialize each command buffer in the command array */
1317         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1318                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1319                 if (!cmdarray[i].cmdbuf) {
1320                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1321                         ret = -1;
1322                         goto done;
1323                 }
1324         }
1325
1326         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1327                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1328                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1329         }
1330         ret = 0;
1331
1332 done:
1333         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1334         return ret;
1335 }
1336
1337 /**
1338  *  @brief This function frees the command buffer.
1339  *
1340  *  @param priv         A pointer to struct lbs_private structure
1341  *  @return             0 or -1
1342  */
1343 int lbs_free_cmd_buffer(struct lbs_private *priv)
1344 {
1345         struct cmd_ctrl_node *cmdarray;
1346         unsigned int i;
1347
1348         lbs_deb_enter(LBS_DEB_HOST);
1349
1350         /* need to check if cmd array is allocated or not */
1351         if (priv->cmd_array == NULL) {
1352                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1353                 goto done;
1354         }
1355
1356         cmdarray = priv->cmd_array;
1357
1358         /* Release shared memory buffers */
1359         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1360                 if (cmdarray[i].cmdbuf) {
1361                         kfree(cmdarray[i].cmdbuf);
1362                         cmdarray[i].cmdbuf = NULL;
1363                 }
1364         }
1365
1366         /* Release cmd_ctrl_node */
1367         if (priv->cmd_array) {
1368                 kfree(priv->cmd_array);
1369                 priv->cmd_array = NULL;
1370         }
1371
1372 done:
1373         lbs_deb_leave(LBS_DEB_HOST);
1374         return 0;
1375 }
1376
1377 /**
1378  *  @brief This function gets a free command node if available in
1379  *  command free queue.
1380  *
1381  *  @param priv         A pointer to struct lbs_private structure
1382  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1383  */
1384 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv)
1385 {
1386         struct cmd_ctrl_node *tempnode;
1387         unsigned long flags;
1388
1389         lbs_deb_enter(LBS_DEB_HOST);
1390
1391         if (!priv)
1392                 return NULL;
1393
1394         spin_lock_irqsave(&priv->driver_lock, flags);
1395
1396         if (!list_empty(&priv->cmdfreeq)) {
1397                 tempnode = list_first_entry(&priv->cmdfreeq,
1398                                             struct cmd_ctrl_node, list);
1399                 list_del(&tempnode->list);
1400         } else {
1401                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1402                 tempnode = NULL;
1403         }
1404
1405         spin_unlock_irqrestore(&priv->driver_lock, flags);
1406
1407         lbs_deb_leave(LBS_DEB_HOST);
1408         return tempnode;
1409 }
1410
1411 /**
1412  *  @brief This function executes next command in command
1413  *  pending queue. It will put firmware back to PS mode
1414  *  if applicable.
1415  *
1416  *  @param priv     A pointer to struct lbs_private structure
1417  *  @return        0 or -1
1418  */
1419 int lbs_execute_next_command(struct lbs_private *priv)
1420 {
1421         struct cmd_ctrl_node *cmdnode = NULL;
1422         struct cmd_header *cmd;
1423         unsigned long flags;
1424         int ret = 0;
1425
1426         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1427          * only caller to us is lbs_thread() and we get even when a
1428          * data packet is received */
1429         lbs_deb_enter(LBS_DEB_THREAD);
1430
1431         spin_lock_irqsave(&priv->driver_lock, flags);
1432
1433         if (priv->cur_cmd) {
1434                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1435                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1436                 ret = -1;
1437                 goto done;
1438         }
1439
1440         if (!list_empty(&priv->cmdpendingq)) {
1441                 cmdnode = list_first_entry(&priv->cmdpendingq,
1442                                            struct cmd_ctrl_node, list);
1443         }
1444
1445         spin_unlock_irqrestore(&priv->driver_lock, flags);
1446
1447         if (cmdnode) {
1448                 cmd = cmdnode->cmdbuf;
1449
1450                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1451                         if ((priv->psstate == PS_STATE_SLEEP) ||
1452                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1453                                 lbs_deb_host(
1454                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1455                                        le16_to_cpu(cmd->command),
1456                                        priv->psstate);
1457                                 ret = -1;
1458                                 goto done;
1459                         }
1460                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1461                                      "0x%04x in psstate %d\n",
1462                                      le16_to_cpu(cmd->command), priv->psstate);
1463                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1464                         /*
1465                          * 1. Non-PS command:
1466                          * Queue it. set needtowakeup to TRUE if current state
1467                          * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
1468                          * 2. PS command but not Exit_PS:
1469                          * Ignore it.
1470                          * 3. PS command Exit_PS:
1471                          * Set needtowakeup to TRUE if current state is SLEEP,
1472                          * otherwise send this command down to firmware
1473                          * immediately.
1474                          */
1475                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1476                                 /*  Prepare to send Exit PS,
1477                                  *  this non PS command will be sent later */
1478                                 if ((priv->psstate == PS_STATE_SLEEP)
1479                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1480                                     ) {
1481                                         /* w/ new scheme, it will not reach here.
1482                                            since it is blocked in main_thread. */
1483                                         priv->needtowakeup = 1;
1484                                 } else
1485                                         lbs_ps_wakeup(priv, 0);
1486
1487                                 ret = 0;
1488                                 goto done;
1489                         } else {
1490                                 /*
1491                                  * PS command. Ignore it if it is not Exit_PS.
1492                                  * otherwise send it down immediately.
1493                                  */
1494                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1495
1496                                 lbs_deb_host(
1497                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1498                                        psm->action);
1499                                 if (psm->action !=
1500                                     cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
1501                                         lbs_deb_host(
1502                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1503                                         list_del(&cmdnode->list);
1504                                         spin_lock_irqsave(&priv->driver_lock, flags);
1505                                         lbs_complete_command(priv, cmdnode, 0);
1506                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1507
1508                                         ret = 0;
1509                                         goto done;
1510                                 }
1511
1512                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1513                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1514                                         lbs_deb_host(
1515                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1516                                         list_del(&cmdnode->list);
1517                                         spin_lock_irqsave(&priv->driver_lock, flags);
1518                                         lbs_complete_command(priv, cmdnode, 0);
1519                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1520                                         priv->needtowakeup = 1;
1521
1522                                         ret = 0;
1523                                         goto done;
1524                                 }
1525
1526                                 lbs_deb_host(
1527                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1528                         }
1529                 }
1530                 list_del(&cmdnode->list);
1531                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1532                             le16_to_cpu(cmd->command));
1533                 lbs_submit_command(priv, cmdnode);
1534         } else {
1535                 /*
1536                  * check if in power save mode, if yes, put the device back
1537                  * to PS mode
1538                  */
1539 #ifdef TODO
1540                 /*
1541                  * This was the old code for libertas+wext. Someone that
1542                  * understands this beast should re-code it in a sane way.
1543                  *
1544                  * I actually don't understand why this is related to WPA
1545                  * and to connection status, shouldn't powering should be
1546                  * independ of such things?
1547                  */
1548                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1549                     (priv->psstate == PS_STATE_FULL_POWER) &&
1550                     ((priv->connect_status == LBS_CONNECTED) ||
1551                     lbs_mesh_connected(priv))) {
1552                         if (priv->secinfo.WPAenabled ||
1553                             priv->secinfo.WPA2enabled) {
1554                                 /* check for valid WPA group keys */
1555                                 if (priv->wpa_mcast_key.len ||
1556                                     priv->wpa_unicast_key.len) {
1557                                         lbs_deb_host(
1558                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1559                                                " go back to PS_SLEEP");
1560                                         lbs_ps_sleep(priv, 0);
1561                                 }
1562                         } else {
1563                                 lbs_deb_host(
1564                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1565                                        "go back to PS_SLEEP");
1566                                 lbs_ps_sleep(priv, 0);
1567                         }
1568                 }
1569 #endif
1570         }
1571
1572         ret = 0;
1573 done:
1574         lbs_deb_leave(LBS_DEB_THREAD);
1575         return ret;
1576 }
1577
1578 static void lbs_send_confirmsleep(struct lbs_private *priv)
1579 {
1580         unsigned long flags;
1581         int ret;
1582
1583         lbs_deb_enter(LBS_DEB_HOST);
1584         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1585                 sizeof(confirm_sleep));
1586
1587         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1588                 sizeof(confirm_sleep));
1589         if (ret) {
1590                 lbs_pr_alert("confirm_sleep failed\n");
1591                 goto out;
1592         }
1593
1594         spin_lock_irqsave(&priv->driver_lock, flags);
1595
1596         /* We don't get a response on the sleep-confirmation */
1597         priv->dnld_sent = DNLD_RES_RECEIVED;
1598
1599         if (priv->is_host_sleep_configured) {
1600                 priv->is_host_sleep_activated = 1;
1601                 wake_up_interruptible(&priv->host_sleep_q);
1602         }
1603
1604         /* If nothing to do, go back to sleep (?) */
1605         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1606                 priv->psstate = PS_STATE_SLEEP;
1607
1608         spin_unlock_irqrestore(&priv->driver_lock, flags);
1609
1610 out:
1611         lbs_deb_leave(LBS_DEB_HOST);
1612 }
1613
1614 void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
1615 {
1616         lbs_deb_enter(LBS_DEB_HOST);
1617
1618         /*
1619          * PS is currently supported only in Infrastructure mode
1620          * Remove this check if it is to be supported in IBSS mode also
1621          */
1622
1623         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1624                               CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
1625
1626         lbs_deb_leave(LBS_DEB_HOST);
1627 }
1628
1629 /**
1630  *  @brief This function sends Exit_PS command to firmware.
1631  *
1632  *  @param priv         A pointer to struct lbs_private structure
1633  *  @param wait_option  wait response or not
1634  *  @return             n/a
1635  */
1636 void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
1637 {
1638         __le32 Localpsmode;
1639
1640         lbs_deb_enter(LBS_DEB_HOST);
1641
1642         Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
1643
1644         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1645                               CMD_SUBCMD_EXIT_PS,
1646                               wait_option, 0, &Localpsmode);
1647
1648         lbs_deb_leave(LBS_DEB_HOST);
1649 }
1650
1651 /**
1652  *  @brief This function checks condition and prepares to
1653  *  send sleep confirm command to firmware if ok.
1654  *
1655  *  @param priv         A pointer to struct lbs_private structure
1656  *  @param psmode       Power Saving mode
1657  *  @return             n/a
1658  */
1659 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1660 {
1661         unsigned long flags =0;
1662         int allowed = 1;
1663
1664         lbs_deb_enter(LBS_DEB_HOST);
1665
1666         spin_lock_irqsave(&priv->driver_lock, flags);
1667         if (priv->dnld_sent) {
1668                 allowed = 0;
1669                 lbs_deb_host("dnld_sent was set\n");
1670         }
1671
1672         /* In-progress command? */
1673         if (priv->cur_cmd) {
1674                 allowed = 0;
1675                 lbs_deb_host("cur_cmd was set\n");
1676         }
1677
1678         /* Pending events or command responses? */
1679         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1680                 allowed = 0;
1681                 lbs_deb_host("pending events or command responses\n");
1682         }
1683         spin_unlock_irqrestore(&priv->driver_lock, flags);
1684
1685         if (allowed) {
1686                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1687                 lbs_send_confirmsleep(priv);
1688         } else {
1689                 lbs_deb_host("sleep confirm has been delayed\n");
1690         }
1691
1692         lbs_deb_leave(LBS_DEB_HOST);
1693 }
1694
1695
1696 /**
1697  * @brief Configures the transmission power control functionality.
1698  *
1699  * @param priv          A pointer to struct lbs_private structure
1700  * @param enable        Transmission power control enable
1701  * @param p0            Power level when link quality is good (dBm).
1702  * @param p1            Power level when link quality is fair (dBm).
1703  * @param p2            Power level when link quality is poor (dBm).
1704  * @param usesnr        Use Signal to Noise Ratio in TPC
1705  *
1706  * @return 0 on success
1707  */
1708 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1709                 int8_t p2, int usesnr)
1710 {
1711         struct cmd_ds_802_11_tpc_cfg cmd;
1712         int ret;
1713
1714         memset(&cmd, 0, sizeof(cmd));
1715         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1716         cmd.action = cpu_to_le16(CMD_ACT_SET);
1717         cmd.enable = !!enable;
1718         cmd.usesnr = !!usesnr;
1719         cmd.P0 = p0;
1720         cmd.P1 = p1;
1721         cmd.P2 = p2;
1722
1723         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1724
1725         return ret;
1726 }
1727
1728 /**
1729  * @brief Configures the power adaptation settings.
1730  *
1731  * @param priv          A pointer to struct lbs_private structure
1732  * @param enable        Power adaptation enable
1733  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1734  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1735  * @param p2            Power level for 48 and 54 Mbps (dBm).
1736  *
1737  * @return 0 on Success
1738  */
1739
1740 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1741                 int8_t p1, int8_t p2)
1742 {
1743         struct cmd_ds_802_11_pa_cfg cmd;
1744         int ret;
1745
1746         memset(&cmd, 0, sizeof(cmd));
1747         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1748         cmd.action = cpu_to_le16(CMD_ACT_SET);
1749         cmd.enable = !!enable;
1750         cmd.P0 = p0;
1751         cmd.P1 = p1;
1752         cmd.P2 = p2;
1753
1754         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1755
1756         return ret;
1757 }
1758
1759
1760 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1761         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1762         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1763         unsigned long callback_arg)
1764 {
1765         struct cmd_ctrl_node *cmdnode;
1766
1767         lbs_deb_enter(LBS_DEB_HOST);
1768
1769         if (priv->surpriseremoved) {
1770                 lbs_deb_host("PREP_CMD: card removed\n");
1771                 cmdnode = ERR_PTR(-ENOENT);
1772                 goto done;
1773         }
1774
1775         if (!lbs_is_cmd_allowed(priv)) {
1776                 cmdnode = ERR_PTR(-EBUSY);
1777                 goto done;
1778         }
1779
1780         cmdnode = lbs_get_cmd_ctrl_node(priv);
1781         if (cmdnode == NULL) {
1782                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1783
1784                 /* Wake up main thread to execute next command */
1785                 wake_up_interruptible(&priv->waitq);
1786                 cmdnode = ERR_PTR(-ENOBUFS);
1787                 goto done;
1788         }
1789
1790         cmdnode->callback = callback;
1791         cmdnode->callback_arg = callback_arg;
1792
1793         /* Copy the incoming command to the buffer */
1794         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1795
1796         /* Set sequence number, clean result, move to buffer */
1797         priv->seqnum++;
1798         cmdnode->cmdbuf->command = cpu_to_le16(command);
1799         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1800         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1801         cmdnode->cmdbuf->result  = 0;
1802
1803         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1804
1805         cmdnode->cmdwaitqwoken = 0;
1806         lbs_queue_cmd(priv, cmdnode);
1807         wake_up_interruptible(&priv->waitq);
1808
1809  done:
1810         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1811         return cmdnode;
1812 }
1813
1814 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1815         struct cmd_header *in_cmd, int in_cmd_size)
1816 {
1817         lbs_deb_enter(LBS_DEB_CMD);
1818         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1819                 lbs_cmd_async_callback, 0);
1820         lbs_deb_leave(LBS_DEB_CMD);
1821 }
1822
1823 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1824               struct cmd_header *in_cmd, int in_cmd_size,
1825               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1826               unsigned long callback_arg)
1827 {
1828         struct cmd_ctrl_node *cmdnode;
1829         unsigned long flags;
1830         int ret = 0;
1831
1832         lbs_deb_enter(LBS_DEB_HOST);
1833
1834         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1835                                   callback, callback_arg);
1836         if (IS_ERR(cmdnode)) {
1837                 ret = PTR_ERR(cmdnode);
1838                 goto done;
1839         }
1840
1841         might_sleep();
1842         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1843
1844         spin_lock_irqsave(&priv->driver_lock, flags);
1845         ret = cmdnode->result;
1846         if (ret)
1847                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1848                             command, ret);
1849
1850         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1851         spin_unlock_irqrestore(&priv->driver_lock, flags);
1852
1853 done:
1854         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1855         return ret;
1856 }
1857 EXPORT_SYMBOL_GPL(__lbs_cmd);