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
  10 #include "host.h"
  11 #include "decl.h"
  12 #include "defs.h"
  13 #include "dev.h"
  14 #include "assoc.h"
  15 #include "wext.h"
  16 #include "scan.h"
  17 #include "cmd.h"
  18
  19
  20 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv);
  21
  22 /**
  23  *  @brief Simple callback that copies response back into command
  24  *
  25  *  @param priv         A pointer to struct lbs_private structure
  26  *  @param extra        A pointer to the original command structure for which
  27  *                      'resp' is a response
  28  *  @param resp         A pointer to the command response
  29  *
  30  *  @return             0 on success, error on failure
  31  */
  32 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  33                      struct cmd_header *resp)
  34 {
  35         struct cmd_header *buf = (void *)extra;
  36         uint16_t copy_len;
  37
  38         copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  39         memcpy(buf, resp, copy_len);
  40         return 0;
  41 }
  42 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  43
  44 /**
  45  *  @brief Simple callback that ignores the result. Use this if
  46  *  you just want to send a command to the hardware, but don't
  47  *  care for the result.
  48  *
  49  *  @param priv         ignored
  50  *  @param extra        ignored
  51  *  @param resp         ignored
  52  *
  53  *  @return             0 for success
  54  */
  55 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  56                      struct cmd_header *resp)
  57 {
  58         return 0;
  59 }
  60
  61
  62 /**
  63  *  @brief Checks whether a command is allowed in Power Save mode
  64  *
  65  *  @param command the command ID
  66  *  @return        1 if allowed, 0 if not allowed
  67  */
  68 static u8 is_command_allowed_in_ps(u16 cmd)
  69 {
  70         switch (cmd) {
  71         case CMD_802_11_RSSI:
  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         if (lbs_set_regiontable(priv, priv->regioncode, 0)) {
 179                 ret = -1;
 180                 goto out;
 181         }
 182
 183 out:
 184         lbs_deb_leave(LBS_DEB_CMD);
 185         return ret;
 186 }
 187
 188 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 189                 struct wol_config *p_wol_config)
 190 {
 191         struct cmd_ds_host_sleep cmd_config;
 192         int ret;
 193
 194         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 195         cmd_config.criteria = cpu_to_le32(criteria);
 196         cmd_config.gpio = priv->wol_gpio;
 197         cmd_config.gap = priv->wol_gap;
 198
 199         if (p_wol_config != NULL)
 200                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 201                                 sizeof(struct wol_config));
 202         else
 203                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 204
 205         ret = lbs_cmd_with_response(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config);
 206         if (!ret) {
 207                 if (criteria) {
 208                         lbs_deb_cmd("Set WOL criteria to %x\n", criteria);
 209                         priv->wol_criteria = criteria;
 210                 } else
 211                         memcpy((uint8_t *) p_wol_config,
 212                                         (uint8_t *)&cmd_config.wol_conf,
 213                                         sizeof(struct wol_config));
 214         } else {
 215                 lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
 216         }
 217
 218         return ret;
 219 }
 220 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 221
 222 static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
 223                                    u16 cmd_action)
 224 {
 225         struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
 226
 227         lbs_deb_enter(LBS_DEB_CMD);
 228
 229         cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
 230         cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
 231                                 sizeof(struct cmd_header));
 232         psm->action = cpu_to_le16(cmd_action);
 233         psm->multipledtim = 0;
 234         switch (cmd_action) {
 235         case CMD_SUBCMD_ENTER_PS:
 236                 lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
 237
 238                 psm->locallisteninterval = 0;
 239                 psm->nullpktinterval = 0;
 240                 psm->multipledtim =
 241                     cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
 242                 break;
 243
 244         case CMD_SUBCMD_EXIT_PS:
 245                 lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
 246                 break;
 247
 248         case CMD_SUBCMD_SLEEP_CONFIRMED:
 249                 lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
 250                 break;
 251
 252         default:
 253                 break;
 254         }
 255
 256         lbs_deb_leave(LBS_DEB_CMD);
 257         return 0;
 258 }
 259
 260 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 261                                 struct sleep_params *sp)
 262 {
 263         struct cmd_ds_802_11_sleep_params cmd;
 264         int ret;
 265
 266         lbs_deb_enter(LBS_DEB_CMD);
 267
 268         if (cmd_action == CMD_ACT_GET) {
 269                 memset(&cmd, 0, sizeof(cmd));
 270         } else {
 271                 cmd.error = cpu_to_le16(sp->sp_error);
 272                 cmd.offset = cpu_to_le16(sp->sp_offset);
 273                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 274                 cmd.calcontrol = sp->sp_calcontrol;
 275                 cmd.externalsleepclk = sp->sp_extsleepclk;
 276                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 277         }
 278         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 279         cmd.action = cpu_to_le16(cmd_action);
 280
 281         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 282
 283         if (!ret) {
 284                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 285                             "calcontrol 0x%x extsleepclk 0x%x\n",
 286                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 287                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 288                             cmd.externalsleepclk);
 289
 290                 sp->sp_error = le16_to_cpu(cmd.error);
 291                 sp->sp_offset = le16_to_cpu(cmd.offset);
 292                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 293                 sp->sp_calcontrol = cmd.calcontrol;
 294                 sp->sp_extsleepclk = cmd.externalsleepclk;
 295                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 296         }
 297
 298         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 299         return 0;
 300 }
 301
 302 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 303 {
 304         int ret = 0;
 305
 306         lbs_deb_enter(LBS_DEB_CMD);
 307
 308         if (priv->is_deep_sleep) {
 309                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 310                                         !priv->is_deep_sleep, (10 * HZ))) {
 311                         lbs_pr_err("ds_awake_q: timer expired\n");
 312                         ret = -1;
 313                 }
 314         }
 315
 316         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 317         return ret;
 318 }
 319
 320 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 321 {
 322         int ret =  0;
 323
 324         lbs_deb_enter(LBS_DEB_CMD);
 325
 326         if (deep_sleep) {
 327                 if (priv->is_deep_sleep != 1) {
 328                         lbs_deb_cmd("deep sleep: sleep\n");
 329                         BUG_ON(!priv->enter_deep_sleep);
 330                         ret = priv->enter_deep_sleep(priv);
 331                         if (!ret) {
 332                                 netif_stop_queue(priv->dev);
 333                                 netif_carrier_off(priv->dev);
 334                         }
 335                 } else {
 336                         lbs_pr_err("deep sleep: already enabled\n");
 337                 }
 338         } else {
 339                 if (priv->is_deep_sleep) {
 340                         lbs_deb_cmd("deep sleep: wakeup\n");
 341                         BUG_ON(!priv->exit_deep_sleep);
 342                         ret = priv->exit_deep_sleep(priv);
 343                         if (!ret) {
 344                                 ret = lbs_wait_for_ds_awake(priv);
 345                                 if (ret)
 346                                         lbs_pr_err("deep sleep: wakeup"
 347                                                         "failed\n");
 348                         }
 349                 }
 350         }
 351
 352         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 353         return ret;
 354 }
 355
 356 /**
 357  *  @brief Set an SNMP MIB value
 358  *
 359  *  @param priv         A pointer to struct lbs_private structure
 360  *  @param oid          The OID to set in the firmware
 361  *  @param val          Value to set the OID to
 362  *
 363  *  @return             0 on success, error on failure
 364  */
 365 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 366 {
 367         struct cmd_ds_802_11_snmp_mib cmd;
 368         int ret;
 369
 370         lbs_deb_enter(LBS_DEB_CMD);
 371
 372         memset(&cmd, 0, sizeof (cmd));
 373         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 374         cmd.action = cpu_to_le16(CMD_ACT_SET);
 375         cmd.oid = cpu_to_le16((u16) oid);
 376
 377         switch (oid) {
 378         case SNMP_MIB_OID_BSS_TYPE:
 379                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 380                 cmd.value[0] = val;
 381                 break;
 382         case SNMP_MIB_OID_11D_ENABLE:
 383         case SNMP_MIB_OID_FRAG_THRESHOLD:
 384         case SNMP_MIB_OID_RTS_THRESHOLD:
 385         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 386         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 387                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 388                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 389                 break;
 390         default:
 391                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 392                 ret = -EINVAL;
 393                 goto out;
 394         }
 395
 396         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 397                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 398
 399         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 400
 401 out:
 402         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 403         return ret;
 404 }
 405
 406 /**
 407  *  @brief Get an SNMP MIB value
 408  *
 409  *  @param priv         A pointer to struct lbs_private structure
 410  *  @param oid          The OID to retrieve from the firmware
 411  *  @param out_val      Location for the returned value
 412  *
 413  *  @return             0 on success, error on failure
 414  */
 415 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 416 {
 417         struct cmd_ds_802_11_snmp_mib cmd;
 418         int ret;
 419
 420         lbs_deb_enter(LBS_DEB_CMD);
 421
 422         memset(&cmd, 0, sizeof (cmd));
 423         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 424         cmd.action = cpu_to_le16(CMD_ACT_GET);
 425         cmd.oid = cpu_to_le16(oid);
 426
 427         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 428         if (ret)
 429                 goto out;
 430
 431         switch (le16_to_cpu(cmd.bufsize)) {
 432         case sizeof(u8):
 433                 *out_val = cmd.value[0];
 434                 break;
 435         case sizeof(u16):
 436                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 437                 break;
 438         default:
 439                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 440                             oid, le16_to_cpu(cmd.bufsize));
 441                 break;
 442         }
 443
 444 out:
 445         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 446         return ret;
 447 }
 448
 449 /**
 450  *  @brief Get the min, max, and current TX power
 451  *
 452  *  @param priv         A pointer to struct lbs_private structure
 453  *  @param curlevel     Current power level in dBm
 454  *  @param minlevel     Minimum supported power level in dBm (optional)
 455  *  @param maxlevel     Maximum supported power level in dBm (optional)
 456  *
 457  *  @return             0 on success, error on failure
 458  */
 459 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 460                      s16 *maxlevel)
 461 {
 462         struct cmd_ds_802_11_rf_tx_power cmd;
 463         int ret;
 464
 465         lbs_deb_enter(LBS_DEB_CMD);
 466
 467         memset(&cmd, 0, sizeof(cmd));
 468         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 469         cmd.action = cpu_to_le16(CMD_ACT_GET);
 470
 471         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 472         if (ret == 0) {
 473                 *curlevel = le16_to_cpu(cmd.curlevel);
 474                 if (minlevel)
 475                         *minlevel = cmd.minlevel;
 476                 if (maxlevel)
 477                         *maxlevel = cmd.maxlevel;
 478         }
 479
 480         lbs_deb_leave(LBS_DEB_CMD);
 481         return ret;
 482 }
 483
 484 /**
 485  *  @brief Set the TX power
 486  *
 487  *  @param priv         A pointer to struct lbs_private structure
 488  *  @param dbm          The desired power level in dBm
 489  *
 490  *  @return             0 on success, error on failure
 491  */
 492 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 493 {
 494         struct cmd_ds_802_11_rf_tx_power cmd;
 495         int ret;
 496
 497         lbs_deb_enter(LBS_DEB_CMD);
 498
 499         memset(&cmd, 0, sizeof(cmd));
 500         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 501         cmd.action = cpu_to_le16(CMD_ACT_SET);
 502         cmd.curlevel = cpu_to_le16(dbm);
 503
 504         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 505
 506         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 507
 508         lbs_deb_leave(LBS_DEB_CMD);
 509         return ret;
 510 }
 511
 512 static int lbs_cmd_802_11_monitor_mode(struct cmd_ds_command *cmd,
 513                                       u16 cmd_action, void *pdata_buf)
 514 {
 515         struct cmd_ds_802_11_monitor_mode *monitor = &cmd->params.monitor;
 516
 517         cmd->command = cpu_to_le16(CMD_802_11_MONITOR_MODE);
 518         cmd->size =
 519             cpu_to_le16(sizeof(struct cmd_ds_802_11_monitor_mode) +
 520                              sizeof(struct cmd_header));
 521
 522         monitor->action = cpu_to_le16(cmd_action);
 523         if (cmd_action == CMD_ACT_SET) {
 524                 monitor->mode =
 525                     cpu_to_le16((u16) (*(u32 *) pdata_buf));
 526         }
 527
 528         return 0;
 529 }
 530
 531 /**
 532  *  @brief Get the radio channel
 533  *
 534  *  @param priv         A pointer to struct lbs_private structure
 535  *
 536  *  @return             The channel on success, error on failure
 537  */
 538 static int lbs_get_channel(struct lbs_private *priv)
 539 {
 540         struct cmd_ds_802_11_rf_channel cmd;
 541         int ret = 0;
 542
 543         lbs_deb_enter(LBS_DEB_CMD);
 544
 545         memset(&cmd, 0, sizeof(cmd));
 546         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 547         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 548
 549         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 550         if (ret)
 551                 goto out;
 552
 553         ret = le16_to_cpu(cmd.channel);
 554         lbs_deb_cmd("current radio channel is %d\n", ret);
 555
 556 out:
 557         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 558         return ret;
 559 }
 560
 561 int lbs_update_channel(struct lbs_private *priv)
 562 {
 563         int ret;
 564
 565         /* the channel in f/w could be out of sync; get the current channel */
 566         lbs_deb_enter(LBS_DEB_ASSOC);
 567
 568         ret = lbs_get_channel(priv);
 569         if (ret > 0) {
 570                 priv->channel = ret;
 571                 ret = 0;
 572         }
 573         lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
 574         return ret;
 575 }
 576
 577 /**
 578  *  @brief Set the radio channel
 579  *
 580  *  @param priv         A pointer to struct lbs_private structure
 581  *  @param channel      The desired channel, or 0 to clear a locked channel
 582  *
 583  *  @return             0 on success, error on failure
 584  */
 585 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 586 {
 587         struct cmd_ds_802_11_rf_channel cmd;
 588 #ifdef DEBUG
 589         u8 old_channel = priv->channel;
 590 #endif
 591         int ret = 0;
 592
 593         lbs_deb_enter(LBS_DEB_CMD);
 594
 595         memset(&cmd, 0, sizeof(cmd));
 596         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 597         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 598         cmd.channel = cpu_to_le16(channel);
 599
 600         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 601         if (ret)
 602                 goto out;
 603
 604         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 605         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 606                 priv->channel);
 607
 608 out:
 609         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 610         return ret;
 611 }
 612
 613 static int lbs_cmd_reg_access(struct cmd_ds_command *cmdptr,
 614                                u8 cmd_action, void *pdata_buf)
 615 {
 616         struct lbs_offset_value *offval;
 617
 618         lbs_deb_enter(LBS_DEB_CMD);
 619
 620         offval = (struct lbs_offset_value *)pdata_buf;
 621
 622         switch (le16_to_cpu(cmdptr->command)) {
 623         case CMD_MAC_REG_ACCESS:
 624                 {
 625                         struct cmd_ds_mac_reg_access *macreg;
 626
 627                         cmdptr->size =
 628                             cpu_to_le16(sizeof (struct cmd_ds_mac_reg_access)
 629                                         + sizeof(struct cmd_header));
 630                         macreg =
 631                             (struct cmd_ds_mac_reg_access *)&cmdptr->params.
 632                             macreg;
 633
 634                         macreg->action = cpu_to_le16(cmd_action);
 635                         macreg->offset = cpu_to_le16((u16) offval->offset);
 636                         macreg->value = cpu_to_le32(offval->value);
 637
 638                         break;
 639                 }
 640
 641         case CMD_BBP_REG_ACCESS:
 642                 {
 643                         struct cmd_ds_bbp_reg_access *bbpreg;
 644
 645                         cmdptr->size =
 646                             cpu_to_le16(sizeof
 647                                              (struct cmd_ds_bbp_reg_access)
 648                                              + sizeof(struct cmd_header));
 649                         bbpreg =
 650                             (struct cmd_ds_bbp_reg_access *)&cmdptr->params.
 651                             bbpreg;
 652
 653                         bbpreg->action = cpu_to_le16(cmd_action);
 654                         bbpreg->offset = cpu_to_le16((u16) offval->offset);
 655                         bbpreg->value = (u8) offval->value;
 656
 657                         break;
 658                 }
 659
 660         case CMD_RF_REG_ACCESS:
 661                 {
 662                         struct cmd_ds_rf_reg_access *rfreg;
 663
 664                         cmdptr->size =
 665                             cpu_to_le16(sizeof
 666                                              (struct cmd_ds_rf_reg_access) +
 667                                              sizeof(struct cmd_header));
 668                         rfreg =
 669                             (struct cmd_ds_rf_reg_access *)&cmdptr->params.
 670                             rfreg;
 671
 672                         rfreg->action = cpu_to_le16(cmd_action);
 673                         rfreg->offset = cpu_to_le16((u16) offval->offset);
 674                         rfreg->value = (u8) offval->value;
 675
 676                         break;
 677                 }
 678
 679         default:
 680                 break;
 681         }
 682
 683         lbs_deb_leave(LBS_DEB_CMD);
 684         return 0;
 685 }
 686
 687 static void lbs_queue_cmd(struct lbs_private *priv,
 688                           struct cmd_ctrl_node *cmdnode)
 689 {
 690         unsigned long flags;
 691         int addtail = 1;
 692
 693         lbs_deb_enter(LBS_DEB_HOST);
 694
 695         if (!cmdnode) {
 696                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 697                 goto done;
 698         }
 699         if (!cmdnode->cmdbuf->size) {
 700                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 701                 goto done;
 702         }
 703         cmdnode->result = 0;
 704
 705         /* Exit_PS command needs to be queued in the header always. */
 706         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 707                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf[1];
 708
 709                 if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
 710                         if (priv->psstate != PS_STATE_FULL_POWER)
 711                                 addtail = 0;
 712                 }
 713         }
 714
 715         spin_lock_irqsave(&priv->driver_lock, flags);
 716
 717         if (addtail)
 718                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 719         else
 720                 list_add(&cmdnode->list, &priv->cmdpendingq);
 721
 722         spin_unlock_irqrestore(&priv->driver_lock, flags);
 723
 724         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 725                      le16_to_cpu(cmdnode->cmdbuf->command));
 726
 727 done:
 728         lbs_deb_leave(LBS_DEB_HOST);
 729 }
 730
 731 static void lbs_submit_command(struct lbs_private *priv,
 732                                struct cmd_ctrl_node *cmdnode)
 733 {
 734         unsigned long flags;
 735         struct cmd_header *cmd;
 736         uint16_t cmdsize;
 737         uint16_t command;
 738         int timeo = 3 * HZ;
 739         int ret;
 740
 741         lbs_deb_enter(LBS_DEB_HOST);
 742
 743         cmd = cmdnode->cmdbuf;
 744
 745         spin_lock_irqsave(&priv->driver_lock, flags);
 746         priv->cur_cmd = cmdnode;
 747         priv->cur_cmd_retcode = 0;
 748         spin_unlock_irqrestore(&priv->driver_lock, flags);
 749
 750         cmdsize = le16_to_cpu(cmd->size);
 751         command = le16_to_cpu(cmd->command);
 752
 753         /* These commands take longer */
 754         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 755                 timeo = 5 * HZ;
 756
 757         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 758                      command, le16_to_cpu(cmd->seqnum), cmdsize);
 759         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 760
 761         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 762
 763         if (ret) {
 764                 lbs_pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
 765                 /* Let the timer kick in and retry, and potentially reset
 766                    the whole thing if the condition persists */
 767                 timeo = HZ/4;
 768         }
 769
 770         if (command == CMD_802_11_DEEP_SLEEP) {
 771                 if (priv->is_auto_deep_sleep_enabled) {
 772                         priv->wakeup_dev_required = 1;
 773                         priv->dnld_sent = 0;
 774                 }
 775                 priv->is_deep_sleep = 1;
 776                 lbs_complete_command(priv, cmdnode, 0);
 777         } else {
 778                 /* Setup the timer after transmit command */
 779                 mod_timer(&priv->command_timer, jiffies + timeo);
 780         }
 781
 782         lbs_deb_leave(LBS_DEB_HOST);
 783 }
 784
 785 /**
 786  *  This function inserts command node to cmdfreeq
 787  *  after cleans it. Requires priv->driver_lock held.
 788  */
 789 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 790                                          struct cmd_ctrl_node *cmdnode)
 791 {
 792         lbs_deb_enter(LBS_DEB_HOST);
 793
 794         if (!cmdnode)
 795                 goto out;
 796
 797         cmdnode->callback = NULL;
 798         cmdnode->callback_arg = 0;
 799
 800         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
 801
 802         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 803  out:
 804         lbs_deb_leave(LBS_DEB_HOST);
 805 }
 806
 807 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 808         struct cmd_ctrl_node *ptempcmd)
 809 {
 810         unsigned long flags;
 811
 812         spin_lock_irqsave(&priv->driver_lock, flags);
 813         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
 814         spin_unlock_irqrestore(&priv->driver_lock, flags);
 815 }
 816
 817 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
 818                           int result)
 819 {
 820         if (cmd == priv->cur_cmd)
 821                 priv->cur_cmd_retcode = result;
 822
 823         cmd->result = result;
 824         cmd->cmdwaitqwoken = 1;
 825         wake_up_interruptible(&cmd->cmdwait_q);
 826
 827         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
 828                 __lbs_cleanup_and_insert_cmd(priv, cmd);
 829         priv->cur_cmd = NULL;
 830 }
 831
 832 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
 833 {
 834         struct cmd_ds_802_11_radio_control cmd;
 835         int ret = -EINVAL;
 836
 837         lbs_deb_enter(LBS_DEB_CMD);
 838
 839         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 840         cmd.action = cpu_to_le16(CMD_ACT_SET);
 841
 842         /* Only v8 and below support setting the preamble */
 843         if (priv->fwrelease < 0x09000000) {
 844                 switch (preamble) {
 845                 case RADIO_PREAMBLE_SHORT:
 846                 case RADIO_PREAMBLE_AUTO:
 847                 case RADIO_PREAMBLE_LONG:
 848                         cmd.control = cpu_to_le16(preamble);
 849                         break;
 850                 default:
 851                         goto out;
 852                 }
 853         }
 854
 855         if (radio_on)
 856                 cmd.control |= cpu_to_le16(0x1);
 857         else {
 858                 cmd.control &= cpu_to_le16(~0x1);
 859                 priv->txpower_cur = 0;
 860         }
 861
 862         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
 863                     radio_on ? "ON" : "OFF", preamble);
 864
 865         priv->radio_on = radio_on;
 866
 867         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
 868
 869 out:
 870         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 871         return ret;
 872 }
 873
 874 void lbs_set_mac_control(struct lbs_private *priv)
 875 {
 876         struct cmd_ds_mac_control cmd;
 877
 878         lbs_deb_enter(LBS_DEB_CMD);
 879
 880         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 881         cmd.action = cpu_to_le16(priv->mac_control);
 882         cmd.reserved = 0;
 883
 884         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
 885
 886         lbs_deb_leave(LBS_DEB_CMD);
 887 }
 888
 889 /**
 890  *  @brief This function prepare the command before send to firmware.
 891  *
 892  *  @param priv         A pointer to struct lbs_private structure
 893  *  @param cmd_no       command number
 894  *  @param cmd_action   command action: GET or SET
 895  *  @param wait_option  wait option: wait response or not
 896  *  @param cmd_oid      cmd oid: treated as sub command
 897  *  @param pdata_buf    A pointer to informaion buffer
 898  *  @return             0 or -1
 899  */
 900 int lbs_prepare_and_send_command(struct lbs_private *priv,
 901                           u16 cmd_no,
 902                           u16 cmd_action,
 903                           u16 wait_option, u32 cmd_oid, void *pdata_buf)
 904 {
 905         int ret = 0;
 906         struct cmd_ctrl_node *cmdnode;
 907         struct cmd_ds_command *cmdptr;
 908         unsigned long flags;
 909
 910         lbs_deb_enter(LBS_DEB_HOST);
 911
 912         if (!priv) {
 913                 lbs_deb_host("PREP_CMD: priv is NULL\n");
 914                 ret = -1;
 915                 goto done;
 916         }
 917
 918         if (priv->surpriseremoved) {
 919                 lbs_deb_host("PREP_CMD: card removed\n");
 920                 ret = -1;
 921                 goto done;
 922         }
 923
 924         if (!lbs_is_cmd_allowed(priv)) {
 925                 ret = -EBUSY;
 926                 goto done;
 927         }
 928
 929         cmdnode = lbs_get_cmd_ctrl_node(priv);
 930
 931         if (cmdnode == NULL) {
 932                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
 933
 934                 /* Wake up main thread to execute next command */
 935                 wake_up_interruptible(&priv->waitq);
 936                 ret = -1;
 937                 goto done;
 938         }
 939
 940         cmdnode->callback = NULL;
 941         cmdnode->callback_arg = (unsigned long)pdata_buf;
 942
 943         cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
 944
 945         lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
 946
 947         /* Set sequence number, command and INT option */
 948         priv->seqnum++;
 949         cmdptr->seqnum = cpu_to_le16(priv->seqnum);
 950
 951         cmdptr->command = cpu_to_le16(cmd_no);
 952         cmdptr->result = 0;
 953
 954         switch (cmd_no) {
 955         case CMD_802_11_PS_MODE:
 956                 ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
 957                 break;
 958
 959         case CMD_MAC_REG_ACCESS:
 960         case CMD_BBP_REG_ACCESS:
 961         case CMD_RF_REG_ACCESS:
 962                 ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
 963                 break;
 964
 965         case CMD_802_11_MONITOR_MODE:
 966                 ret = lbs_cmd_802_11_monitor_mode(cmdptr,
 967                                           cmd_action, pdata_buf);
 968                 break;
 969
 970         case CMD_802_11_RSSI:
 971                 ret = lbs_cmd_802_11_rssi(priv, cmdptr);
 972                 break;
 973
 974         case CMD_802_11_SET_AFC:
 975         case CMD_802_11_GET_AFC:
 976
 977                 cmdptr->command = cpu_to_le16(cmd_no);
 978                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
 979                                            sizeof(struct cmd_header));
 980
 981                 memmove(&cmdptr->params.afc,
 982                         pdata_buf, sizeof(struct cmd_ds_802_11_afc));
 983
 984                 ret = 0;
 985                 goto done;
 986
 987         case CMD_802_11_TPC_CFG:
 988                 cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
 989                 cmdptr->size =
 990                     cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
 991                                      sizeof(struct cmd_header));
 992
 993                 memmove(&cmdptr->params.tpccfg,
 994                         pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
 995
 996                 ret = 0;
 997                 break;
 998
 999 #ifdef CONFIG_LIBERTAS_MESH
1000
1001         case CMD_BT_ACCESS:
1002                 ret = lbs_cmd_bt_access(cmdptr, cmd_action, pdata_buf);
1003                 break;
1004
1005         case CMD_FWT_ACCESS:
1006                 ret = lbs_cmd_fwt_access(cmdptr, cmd_action, pdata_buf);
1007                 break;
1008
1009 #endif
1010
1011         case CMD_802_11_BEACON_CTRL:
1012                 ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
1013                 break;
1014         case CMD_802_11_DEEP_SLEEP:
1015                 cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
1016                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
1017                 break;
1018         default:
1019                 lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
1020                 ret = -1;
1021                 break;
1022         }
1023
1024         /* return error, since the command preparation failed */
1025         if (ret != 0) {
1026                 lbs_deb_host("PREP_CMD: command preparation failed\n");
1027                 lbs_cleanup_and_insert_cmd(priv, cmdnode);
1028                 ret = -1;
1029                 goto done;
1030         }
1031
1032         cmdnode->cmdwaitqwoken = 0;
1033
1034         lbs_queue_cmd(priv, cmdnode);
1035         wake_up_interruptible(&priv->waitq);
1036
1037         if (wait_option & CMD_OPTION_WAITFORRSP) {
1038                 lbs_deb_host("PREP_CMD: wait for response\n");
1039                 might_sleep();
1040                 wait_event_interruptible(cmdnode->cmdwait_q,
1041                                          cmdnode->cmdwaitqwoken);
1042         }
1043
1044         spin_lock_irqsave(&priv->driver_lock, flags);
1045         if (priv->cur_cmd_retcode) {
1046                 lbs_deb_host("PREP_CMD: command failed with return code %d\n",
1047                        priv->cur_cmd_retcode);
1048                 priv->cur_cmd_retcode = 0;
1049                 ret = -1;
1050         }
1051         spin_unlock_irqrestore(&priv->driver_lock, flags);
1052
1053 done:
1054         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1055         return ret;
1056 }
1057
1058 /**
1059  *  @brief This function allocates the command buffer and link
1060  *  it to command free queue.
1061  *
1062  *  @param priv         A pointer to struct lbs_private structure
1063  *  @return             0 or -1
1064  */
1065 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1066 {
1067         int ret = 0;
1068         u32 bufsize;
1069         u32 i;
1070         struct cmd_ctrl_node *cmdarray;
1071
1072         lbs_deb_enter(LBS_DEB_HOST);
1073
1074         /* Allocate and initialize the command array */
1075         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1076         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1077                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1078                 ret = -1;
1079                 goto done;
1080         }
1081         priv->cmd_array = cmdarray;
1082
1083         /* Allocate and initialize each command buffer in the command array */
1084         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1085                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1086                 if (!cmdarray[i].cmdbuf) {
1087                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1088                         ret = -1;
1089                         goto done;
1090                 }
1091         }
1092
1093         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1094                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1095                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1096         }
1097         ret = 0;
1098
1099 done:
1100         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1101         return ret;
1102 }
1103
1104 /**
1105  *  @brief This function frees the command buffer.
1106  *
1107  *  @param priv         A pointer to struct lbs_private structure
1108  *  @return             0 or -1
1109  */
1110 int lbs_free_cmd_buffer(struct lbs_private *priv)
1111 {
1112         struct cmd_ctrl_node *cmdarray;
1113         unsigned int i;
1114
1115         lbs_deb_enter(LBS_DEB_HOST);
1116
1117         /* need to check if cmd array is allocated or not */
1118         if (priv->cmd_array == NULL) {
1119                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1120                 goto done;
1121         }
1122
1123         cmdarray = priv->cmd_array;
1124
1125         /* Release shared memory buffers */
1126         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1127                 if (cmdarray[i].cmdbuf) {
1128                         kfree(cmdarray[i].cmdbuf);
1129                         cmdarray[i].cmdbuf = NULL;
1130                 }
1131         }
1132
1133         /* Release cmd_ctrl_node */
1134         if (priv->cmd_array) {
1135                 kfree(priv->cmd_array);
1136                 priv->cmd_array = NULL;
1137         }
1138
1139 done:
1140         lbs_deb_leave(LBS_DEB_HOST);
1141         return 0;
1142 }
1143
1144 /**
1145  *  @brief This function gets a free command node if available in
1146  *  command free queue.
1147  *
1148  *  @param priv         A pointer to struct lbs_private structure
1149  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1150  */
1151 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv)
1152 {
1153         struct cmd_ctrl_node *tempnode;
1154         unsigned long flags;
1155
1156         lbs_deb_enter(LBS_DEB_HOST);
1157
1158         if (!priv)
1159                 return NULL;
1160
1161         spin_lock_irqsave(&priv->driver_lock, flags);
1162
1163         if (!list_empty(&priv->cmdfreeq)) {
1164                 tempnode = list_first_entry(&priv->cmdfreeq,
1165                                             struct cmd_ctrl_node, list);
1166                 list_del(&tempnode->list);
1167         } else {
1168                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1169                 tempnode = NULL;
1170         }
1171
1172         spin_unlock_irqrestore(&priv->driver_lock, flags);
1173
1174         lbs_deb_leave(LBS_DEB_HOST);
1175         return tempnode;
1176 }
1177
1178 /**
1179  *  @brief This function executes next command in command
1180  *  pending queue. It will put firmware back to PS mode
1181  *  if applicable.
1182  *
1183  *  @param priv     A pointer to struct lbs_private structure
1184  *  @return        0 or -1
1185  */
1186 int lbs_execute_next_command(struct lbs_private *priv)
1187 {
1188         struct cmd_ctrl_node *cmdnode = NULL;
1189         struct cmd_header *cmd;
1190         unsigned long flags;
1191         int ret = 0;
1192
1193         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1194          * only caller to us is lbs_thread() and we get even when a
1195          * data packet is received */
1196         lbs_deb_enter(LBS_DEB_THREAD);
1197
1198         spin_lock_irqsave(&priv->driver_lock, flags);
1199
1200         if (priv->cur_cmd) {
1201                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1202                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1203                 ret = -1;
1204                 goto done;
1205         }
1206
1207         if (!list_empty(&priv->cmdpendingq)) {
1208                 cmdnode = list_first_entry(&priv->cmdpendingq,
1209                                            struct cmd_ctrl_node, list);
1210         }
1211
1212         spin_unlock_irqrestore(&priv->driver_lock, flags);
1213
1214         if (cmdnode) {
1215                 cmd = cmdnode->cmdbuf;
1216
1217                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1218                         if ((priv->psstate == PS_STATE_SLEEP) ||
1219                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1220                                 lbs_deb_host(
1221                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1222                                        le16_to_cpu(cmd->command),
1223                                        priv->psstate);
1224                                 ret = -1;
1225                                 goto done;
1226                         }
1227                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1228                                      "0x%04x in psstate %d\n",
1229                                      le16_to_cpu(cmd->command), priv->psstate);
1230                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1231                         /*
1232                          * 1. Non-PS command:
1233                          * Queue it. set needtowakeup to TRUE if current state
1234                          * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
1235                          * 2. PS command but not Exit_PS:
1236                          * Ignore it.
1237                          * 3. PS command Exit_PS:
1238                          * Set needtowakeup to TRUE if current state is SLEEP,
1239                          * otherwise send this command down to firmware
1240                          * immediately.
1241                          */
1242                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1243                                 /*  Prepare to send Exit PS,
1244                                  *  this non PS command will be sent later */
1245                                 if ((priv->psstate == PS_STATE_SLEEP)
1246                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1247                                     ) {
1248                                         /* w/ new scheme, it will not reach here.
1249                                            since it is blocked in main_thread. */
1250                                         priv->needtowakeup = 1;
1251                                 } else
1252                                         lbs_ps_wakeup(priv, 0);
1253
1254                                 ret = 0;
1255                                 goto done;
1256                         } else {
1257                                 /*
1258                                  * PS command. Ignore it if it is not Exit_PS.
1259                                  * otherwise send it down immediately.
1260                                  */
1261                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1262
1263                                 lbs_deb_host(
1264                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1265                                        psm->action);
1266                                 if (psm->action !=
1267                                     cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
1268                                         lbs_deb_host(
1269                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1270                                         list_del(&cmdnode->list);
1271                                         spin_lock_irqsave(&priv->driver_lock, flags);
1272                                         lbs_complete_command(priv, cmdnode, 0);
1273                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1274
1275                                         ret = 0;
1276                                         goto done;
1277                                 }
1278
1279                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1280                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1281                                         lbs_deb_host(
1282                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1283                                         list_del(&cmdnode->list);
1284                                         spin_lock_irqsave(&priv->driver_lock, flags);
1285                                         lbs_complete_command(priv, cmdnode, 0);
1286                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1287                                         priv->needtowakeup = 1;
1288
1289                                         ret = 0;
1290                                         goto done;
1291                                 }
1292
1293                                 lbs_deb_host(
1294                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1295                         }
1296                 }
1297                 list_del(&cmdnode->list);
1298                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1299                             le16_to_cpu(cmd->command));
1300                 lbs_submit_command(priv, cmdnode);
1301         } else {
1302                 /*
1303                  * check if in power save mode, if yes, put the device back
1304                  * to PS mode
1305                  */
1306                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1307                     (priv->psstate == PS_STATE_FULL_POWER) &&
1308                     ((priv->connect_status == LBS_CONNECTED) ||
1309                     lbs_mesh_connected(priv))) {
1310                         if (priv->secinfo.WPAenabled ||
1311                             priv->secinfo.WPA2enabled) {
1312                                 /* check for valid WPA group keys */
1313                                 if (priv->wpa_mcast_key.len ||
1314                                     priv->wpa_unicast_key.len) {
1315                                         lbs_deb_host(
1316                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1317                                                " go back to PS_SLEEP");
1318                                         lbs_ps_sleep(priv, 0);
1319                                 }
1320                         } else {
1321                                 lbs_deb_host(
1322                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1323                                        "go back to PS_SLEEP");
1324                                 lbs_ps_sleep(priv, 0);
1325                         }
1326                 }
1327         }
1328
1329         ret = 0;
1330 done:
1331         lbs_deb_leave(LBS_DEB_THREAD);
1332         return ret;
1333 }
1334
1335 static void lbs_send_confirmsleep(struct lbs_private *priv)
1336 {
1337         unsigned long flags;
1338         int ret;
1339
1340         lbs_deb_enter(LBS_DEB_HOST);
1341         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1342                 sizeof(confirm_sleep));
1343
1344         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1345                 sizeof(confirm_sleep));
1346         if (ret) {
1347                 lbs_pr_alert("confirm_sleep failed\n");
1348                 goto out;
1349         }
1350
1351         spin_lock_irqsave(&priv->driver_lock, flags);
1352
1353         /* We don't get a response on the sleep-confirmation */
1354         priv->dnld_sent = DNLD_RES_RECEIVED;
1355
1356         /* If nothing to do, go back to sleep (?) */
1357         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1358                 priv->psstate = PS_STATE_SLEEP;
1359
1360         spin_unlock_irqrestore(&priv->driver_lock, flags);
1361
1362 out:
1363         lbs_deb_leave(LBS_DEB_HOST);
1364 }
1365
1366 void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
1367 {
1368         lbs_deb_enter(LBS_DEB_HOST);
1369
1370         /*
1371          * PS is currently supported only in Infrastructure mode
1372          * Remove this check if it is to be supported in IBSS mode also
1373          */
1374
1375         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1376                               CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
1377
1378         lbs_deb_leave(LBS_DEB_HOST);
1379 }
1380
1381 /**
1382  *  @brief This function sends Exit_PS command to firmware.
1383  *
1384  *  @param priv         A pointer to struct lbs_private structure
1385  *  @param wait_option  wait response or not
1386  *  @return             n/a
1387  */
1388 void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
1389 {
1390         __le32 Localpsmode;
1391
1392         lbs_deb_enter(LBS_DEB_HOST);
1393
1394         Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
1395
1396         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1397                               CMD_SUBCMD_EXIT_PS,
1398                               wait_option, 0, &Localpsmode);
1399
1400         lbs_deb_leave(LBS_DEB_HOST);
1401 }
1402
1403 /**
1404  *  @brief This function checks condition and prepares to
1405  *  send sleep confirm command to firmware if ok.
1406  *
1407  *  @param priv         A pointer to struct lbs_private structure
1408  *  @param psmode       Power Saving mode
1409  *  @return             n/a
1410  */
1411 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1412 {
1413         unsigned long flags =0;
1414         int allowed = 1;
1415
1416         lbs_deb_enter(LBS_DEB_HOST);
1417
1418         spin_lock_irqsave(&priv->driver_lock, flags);
1419         if (priv->dnld_sent) {
1420                 allowed = 0;
1421                 lbs_deb_host("dnld_sent was set\n");
1422         }
1423
1424         /* In-progress command? */
1425         if (priv->cur_cmd) {
1426                 allowed = 0;
1427                 lbs_deb_host("cur_cmd was set\n");
1428         }
1429
1430         /* Pending events or command responses? */
1431         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1432                 allowed = 0;
1433                 lbs_deb_host("pending events or command responses\n");
1434         }
1435         spin_unlock_irqrestore(&priv->driver_lock, flags);
1436
1437         if (allowed) {
1438                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1439                 lbs_send_confirmsleep(priv);
1440         } else {
1441                 lbs_deb_host("sleep confirm has been delayed\n");
1442         }
1443
1444         lbs_deb_leave(LBS_DEB_HOST);
1445 }
1446
1447
1448 /**
1449  * @brief Configures the transmission power control functionality.
1450  *
1451  * @param priv          A pointer to struct lbs_private structure
1452  * @param enable        Transmission power control enable
1453  * @param p0            Power level when link quality is good (dBm).
1454  * @param p1            Power level when link quality is fair (dBm).
1455  * @param p2            Power level when link quality is poor (dBm).
1456  * @param usesnr        Use Signal to Noise Ratio in TPC
1457  *
1458  * @return 0 on success
1459  */
1460 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1461                 int8_t p2, int usesnr)
1462 {
1463         struct cmd_ds_802_11_tpc_cfg cmd;
1464         int ret;
1465
1466         memset(&cmd, 0, sizeof(cmd));
1467         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1468         cmd.action = cpu_to_le16(CMD_ACT_SET);
1469         cmd.enable = !!enable;
1470         cmd.usesnr = !!usesnr;
1471         cmd.P0 = p0;
1472         cmd.P1 = p1;
1473         cmd.P2 = p2;
1474
1475         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1476
1477         return ret;
1478 }
1479
1480 /**
1481  * @brief Configures the power adaptation settings.
1482  *
1483  * @param priv          A pointer to struct lbs_private structure
1484  * @param enable        Power adaptation enable
1485  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1486  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1487  * @param p2            Power level for 48 and 54 Mbps (dBm).
1488  *
1489  * @return 0 on Success
1490  */
1491
1492 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1493                 int8_t p1, int8_t p2)
1494 {
1495         struct cmd_ds_802_11_pa_cfg cmd;
1496         int ret;
1497
1498         memset(&cmd, 0, sizeof(cmd));
1499         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1500         cmd.action = cpu_to_le16(CMD_ACT_SET);
1501         cmd.enable = !!enable;
1502         cmd.P0 = p0;
1503         cmd.P1 = p1;
1504         cmd.P2 = p2;
1505
1506         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1507
1508         return ret;
1509 }
1510
1511
1512 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1513         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1514         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1515         unsigned long callback_arg)
1516 {
1517         struct cmd_ctrl_node *cmdnode;
1518
1519         lbs_deb_enter(LBS_DEB_HOST);
1520
1521         if (priv->surpriseremoved) {
1522                 lbs_deb_host("PREP_CMD: card removed\n");
1523                 cmdnode = ERR_PTR(-ENOENT);
1524                 goto done;
1525         }
1526
1527         if (!lbs_is_cmd_allowed(priv)) {
1528                 cmdnode = ERR_PTR(-EBUSY);
1529                 goto done;
1530         }
1531
1532         cmdnode = lbs_get_cmd_ctrl_node(priv);
1533         if (cmdnode == NULL) {
1534                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1535
1536                 /* Wake up main thread to execute next command */
1537                 wake_up_interruptible(&priv->waitq);
1538                 cmdnode = ERR_PTR(-ENOBUFS);
1539                 goto done;
1540         }
1541
1542         cmdnode->callback = callback;
1543         cmdnode->callback_arg = callback_arg;
1544
1545         /* Copy the incoming command to the buffer */
1546         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1547
1548         /* Set sequence number, clean result, move to buffer */
1549         priv->seqnum++;
1550         cmdnode->cmdbuf->command = cpu_to_le16(command);
1551         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1552         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1553         cmdnode->cmdbuf->result  = 0;
1554
1555         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1556
1557         cmdnode->cmdwaitqwoken = 0;
1558         lbs_queue_cmd(priv, cmdnode);
1559         wake_up_interruptible(&priv->waitq);
1560
1561  done:
1562         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1563         return cmdnode;
1564 }
1565
1566 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1567         struct cmd_header *in_cmd, int in_cmd_size)
1568 {
1569         lbs_deb_enter(LBS_DEB_CMD);
1570         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1571                 lbs_cmd_async_callback, 0);
1572         lbs_deb_leave(LBS_DEB_CMD);
1573 }
1574
1575 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1576               struct cmd_header *in_cmd, int in_cmd_size,
1577               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1578               unsigned long callback_arg)
1579 {
1580         struct cmd_ctrl_node *cmdnode;
1581         unsigned long flags;
1582         int ret = 0;
1583
1584         lbs_deb_enter(LBS_DEB_HOST);
1585
1586         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1587                                   callback, callback_arg);
1588         if (IS_ERR(cmdnode)) {
1589                 ret = PTR_ERR(cmdnode);
1590                 goto done;
1591         }
1592
1593         might_sleep();
1594         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1595
1596         spin_lock_irqsave(&priv->driver_lock, flags);
1597         ret = cmdnode->result;
1598         if (ret)
1599                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1600                             command, ret);
1601
1602         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1603         spin_unlock_irqrestore(&priv->driver_lock, flags);
1604
1605 done:
1606         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1607         return ret;
1608 }
1609 EXPORT_SYMBOL_GPL(__lbs_cmd);