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
   9 #include "host.h"
  10 #include "decl.h"
  11 #include "defs.h"
  12 #include "dev.h"
  13 #include "assoc.h"
  14 #include "wext.h"
  15 #include "scan.h"
  16 #include "cmd.h"
  17
  18
  19 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv);
  20
  21 /**
  22  *  @brief Simple callback that copies response back into command
  23  *
  24  *  @param priv         A pointer to struct lbs_private structure
  25  *  @param extra        A pointer to the original command structure for which
  26  *                      'resp' is a response
  27  *  @param resp         A pointer to the command response
  28  *
  29  *  @return             0 on success, error on failure
  30  */
  31 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  32                      struct cmd_header *resp)
  33 {
  34         struct cmd_header *buf = (void *)extra;
  35         uint16_t copy_len;
  36
  37         copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  38         memcpy(buf, resp, copy_len);
  39         return 0;
  40 }
  41 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  42
  43 /**
  44  *  @brief Simple callback that ignores the result. Use this if
  45  *  you just want to send a command to the hardware, but don't
  46  *  care for the result.
  47  *
  48  *  @param priv         ignored
  49  *  @param extra        ignored
  50  *  @param resp         ignored
  51  *
  52  *  @return             0 for success
  53  */
  54 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  55                      struct cmd_header *resp)
  56 {
  57         return 0;
  58 }
  59
  60
  61 /**
  62  *  @brief Checks whether a command is allowed in Power Save mode
  63  *
  64  *  @param command the command ID
  65  *  @return        1 if allowed, 0 if not allowed
  66  */
  67 static u8 is_command_allowed_in_ps(u16 cmd)
  68 {
  69         switch (cmd) {
  70         case CMD_802_11_RSSI:
  71                 return 1;
  72         default:
  73                 break;
  74         }
  75         return 0;
  76 }
  77
  78 /**
  79  *  @brief This function checks if the command is allowed.
  80  *
  81  *  @param priv         A pointer to lbs_private structure
  82  *  @return             allowed or not allowed.
  83  */
  84
  85 static int lbs_is_cmd_allowed(struct lbs_private *priv)
  86 {
  87         int ret = 1;
  88
  89         lbs_deb_enter(LBS_DEB_CMD);
  90
  91         if (!priv->is_auto_deep_sleep_enabled) {
  92                 if (priv->is_deep_sleep) {
  93                         lbs_deb_cmd("command not allowed in deep sleep\n");
  94                         ret = 0;
  95                 }
  96         }
  97
  98         lbs_deb_leave(LBS_DEB_CMD);
  99         return ret;
 100 }
 101
 102 /**
 103  *  @brief Updates the hardware details like MAC address and regulatory region
 104  *
 105  *  @param priv         A pointer to struct lbs_private structure
 106  *
 107  *  @return             0 on success, error on failure
 108  */
 109 int lbs_update_hw_spec(struct lbs_private *priv)
 110 {
 111         struct cmd_ds_get_hw_spec cmd;
 112         int ret = -1;
 113         u32 i;
 114
 115         lbs_deb_enter(LBS_DEB_CMD);
 116
 117         memset(&cmd, 0, sizeof(cmd));
 118         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 119         memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
 120         ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
 121         if (ret)
 122                 goto out;
 123
 124         priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 125
 126         /* The firmware release is in an interesting format: the patch
 127          * level is in the most significant nibble ... so fix that: */
 128         priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 129         priv->fwrelease = (priv->fwrelease << 8) |
 130                 (priv->fwrelease >> 24 & 0xff);
 131
 132         /* Some firmware capabilities:
 133          * CF card    firmware 5.0.16p0:   cap 0x00000303
 134          * USB dongle firmware 5.110.17p2: cap 0x00000303
 135          */
 136         lbs_pr_info("%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 137                 cmd.permanentaddr,
 138                 priv->fwrelease >> 24 & 0xff,
 139                 priv->fwrelease >> 16 & 0xff,
 140                 priv->fwrelease >>  8 & 0xff,
 141                 priv->fwrelease       & 0xff,
 142                 priv->fwcapinfo);
 143         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 144                     cmd.hwifversion, cmd.version);
 145
 146         /* Clamp region code to 8-bit since FW spec indicates that it should
 147          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 148          * returns non-zero high 8 bits here.
 149          *
 150          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 151          * need to check for this problem and handle it properly.
 152          */
 153         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 154                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 155         else
 156                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 157
 158         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 159                 /* use the region code to search for the index */
 160                 if (priv->regioncode == lbs_region_code_to_index[i])
 161                         break;
 162         }
 163
 164         /* if it's unidentified region code, use the default (USA) */
 165         if (i >= MRVDRV_MAX_REGION_CODE) {
 166                 priv->regioncode = 0x10;
 167                 lbs_pr_info("unidentified region code; using the default (USA)\n");
 168         }
 169
 170         if (priv->current_addr[0] == 0xff)
 171                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 172
 173         memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 174         if (priv->mesh_dev)
 175                 memcpy(priv->mesh_dev->dev_addr, priv->current_addr, ETH_ALEN);
 176
 177         if (lbs_set_regiontable(priv, priv->regioncode, 0)) {
 178                 ret = -1;
 179                 goto out;
 180         }
 181
 182 out:
 183         lbs_deb_leave(LBS_DEB_CMD);
 184         return ret;
 185 }
 186
 187 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 188                 struct wol_config *p_wol_config)
 189 {
 190         struct cmd_ds_host_sleep cmd_config;
 191         int ret;
 192
 193         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 194         cmd_config.criteria = cpu_to_le32(criteria);
 195         cmd_config.gpio = priv->wol_gpio;
 196         cmd_config.gap = priv->wol_gap;
 197
 198         if (p_wol_config != NULL)
 199                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 200                                 sizeof(struct wol_config));
 201         else
 202                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 203
 204         ret = lbs_cmd_with_response(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config);
 205         if (!ret) {
 206                 if (criteria) {
 207                         lbs_deb_cmd("Set WOL criteria to %x\n", criteria);
 208                         priv->wol_criteria = criteria;
 209                 } else
 210                         memcpy((uint8_t *) p_wol_config,
 211                                         (uint8_t *)&cmd_config.wol_conf,
 212                                         sizeof(struct wol_config));
 213         } else {
 214                 lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
 215         }
 216
 217         return ret;
 218 }
 219 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 220
 221 static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
 222                                    u16 cmd_action)
 223 {
 224         struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
 225
 226         lbs_deb_enter(LBS_DEB_CMD);
 227
 228         cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
 229         cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
 230                                 sizeof(struct cmd_header));
 231         psm->action = cpu_to_le16(cmd_action);
 232         psm->multipledtim = 0;
 233         switch (cmd_action) {
 234         case CMD_SUBCMD_ENTER_PS:
 235                 lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
 236
 237                 psm->locallisteninterval = 0;
 238                 psm->nullpktinterval = 0;
 239                 psm->multipledtim =
 240                     cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
 241                 break;
 242
 243         case CMD_SUBCMD_EXIT_PS:
 244                 lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
 245                 break;
 246
 247         case CMD_SUBCMD_SLEEP_CONFIRMED:
 248                 lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
 249                 break;
 250
 251         default:
 252                 break;
 253         }
 254
 255         lbs_deb_leave(LBS_DEB_CMD);
 256         return 0;
 257 }
 258
 259 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 260                                 struct sleep_params *sp)
 261 {
 262         struct cmd_ds_802_11_sleep_params cmd;
 263         int ret;
 264
 265         lbs_deb_enter(LBS_DEB_CMD);
 266
 267         if (cmd_action == CMD_ACT_GET) {
 268                 memset(&cmd, 0, sizeof(cmd));
 269         } else {
 270                 cmd.error = cpu_to_le16(sp->sp_error);
 271                 cmd.offset = cpu_to_le16(sp->sp_offset);
 272                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 273                 cmd.calcontrol = sp->sp_calcontrol;
 274                 cmd.externalsleepclk = sp->sp_extsleepclk;
 275                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 276         }
 277         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 278         cmd.action = cpu_to_le16(cmd_action);
 279
 280         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 281
 282         if (!ret) {
 283                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 284                             "calcontrol 0x%x extsleepclk 0x%x\n",
 285                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 286                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 287                             cmd.externalsleepclk);
 288
 289                 sp->sp_error = le16_to_cpu(cmd.error);
 290                 sp->sp_offset = le16_to_cpu(cmd.offset);
 291                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 292                 sp->sp_calcontrol = cmd.calcontrol;
 293                 sp->sp_extsleepclk = cmd.externalsleepclk;
 294                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 295         }
 296
 297         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 298         return 0;
 299 }
 300
 301 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 302 {
 303         int ret = 0;
 304
 305         lbs_deb_enter(LBS_DEB_CMD);
 306
 307         if (priv->is_deep_sleep) {
 308                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 309                                         !priv->is_deep_sleep, (10 * HZ))) {
 310                         lbs_pr_err("ds_awake_q: timer expired\n");
 311                         ret = -1;
 312                 }
 313         }
 314
 315         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 316         return ret;
 317 }
 318
 319 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 320 {
 321         int ret =  0;
 322
 323         lbs_deb_enter(LBS_DEB_CMD);
 324
 325         if (deep_sleep) {
 326                 if (priv->is_deep_sleep != 1) {
 327                         lbs_deb_cmd("deep sleep: sleep\n");
 328                         BUG_ON(!priv->enter_deep_sleep);
 329                         ret = priv->enter_deep_sleep(priv);
 330                         if (!ret) {
 331                                 netif_stop_queue(priv->dev);
 332                                 netif_carrier_off(priv->dev);
 333                         }
 334                 } else {
 335                         lbs_pr_err("deep sleep: already enabled\n");
 336                 }
 337         } else {
 338                 if (priv->is_deep_sleep) {
 339                         lbs_deb_cmd("deep sleep: wakeup\n");
 340                         BUG_ON(!priv->exit_deep_sleep);
 341                         ret = priv->exit_deep_sleep(priv);
 342                         if (!ret) {
 343                                 ret = lbs_wait_for_ds_awake(priv);
 344                                 if (ret)
 345                                         lbs_pr_err("deep sleep: wakeup"
 346                                                         "failed\n");
 347                         }
 348                 }
 349         }
 350
 351         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 352         return ret;
 353 }
 354
 355 /**
 356  *  @brief Set an SNMP MIB value
 357  *
 358  *  @param priv         A pointer to struct lbs_private structure
 359  *  @param oid          The OID to set in the firmware
 360  *  @param val          Value to set the OID to
 361  *
 362  *  @return             0 on success, error on failure
 363  */
 364 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 365 {
 366         struct cmd_ds_802_11_snmp_mib cmd;
 367         int ret;
 368
 369         lbs_deb_enter(LBS_DEB_CMD);
 370
 371         memset(&cmd, 0, sizeof (cmd));
 372         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 373         cmd.action = cpu_to_le16(CMD_ACT_SET);
 374         cmd.oid = cpu_to_le16((u16) oid);
 375
 376         switch (oid) {
 377         case SNMP_MIB_OID_BSS_TYPE:
 378                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 379                 cmd.value[0] = val;
 380                 break;
 381         case SNMP_MIB_OID_11D_ENABLE:
 382         case SNMP_MIB_OID_FRAG_THRESHOLD:
 383         case SNMP_MIB_OID_RTS_THRESHOLD:
 384         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 385         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 386                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 387                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 388                 break;
 389         default:
 390                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 391                 ret = -EINVAL;
 392                 goto out;
 393         }
 394
 395         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 396                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 397
 398         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 399
 400 out:
 401         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 402         return ret;
 403 }
 404
 405 /**
 406  *  @brief Get an SNMP MIB value
 407  *
 408  *  @param priv         A pointer to struct lbs_private structure
 409  *  @param oid          The OID to retrieve from the firmware
 410  *  @param out_val      Location for the returned value
 411  *
 412  *  @return             0 on success, error on failure
 413  */
 414 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 415 {
 416         struct cmd_ds_802_11_snmp_mib cmd;
 417         int ret;
 418
 419         lbs_deb_enter(LBS_DEB_CMD);
 420
 421         memset(&cmd, 0, sizeof (cmd));
 422         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 423         cmd.action = cpu_to_le16(CMD_ACT_GET);
 424         cmd.oid = cpu_to_le16(oid);
 425
 426         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 427         if (ret)
 428                 goto out;
 429
 430         switch (le16_to_cpu(cmd.bufsize)) {
 431         case sizeof(u8):
 432                 *out_val = cmd.value[0];
 433                 break;
 434         case sizeof(u16):
 435                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 436                 break;
 437         default:
 438                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 439                             oid, le16_to_cpu(cmd.bufsize));
 440                 break;
 441         }
 442
 443 out:
 444         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 445         return ret;
 446 }
 447
 448 /**
 449  *  @brief Get the min, max, and current TX power
 450  *
 451  *  @param priv         A pointer to struct lbs_private structure
 452  *  @param curlevel     Current power level in dBm
 453  *  @param minlevel     Minimum supported power level in dBm (optional)
 454  *  @param maxlevel     Maximum supported power level in dBm (optional)
 455  *
 456  *  @return             0 on success, error on failure
 457  */
 458 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 459                      s16 *maxlevel)
 460 {
 461         struct cmd_ds_802_11_rf_tx_power cmd;
 462         int ret;
 463
 464         lbs_deb_enter(LBS_DEB_CMD);
 465
 466         memset(&cmd, 0, sizeof(cmd));
 467         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 468         cmd.action = cpu_to_le16(CMD_ACT_GET);
 469
 470         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 471         if (ret == 0) {
 472                 *curlevel = le16_to_cpu(cmd.curlevel);
 473                 if (minlevel)
 474                         *minlevel = cmd.minlevel;
 475                 if (maxlevel)
 476                         *maxlevel = cmd.maxlevel;
 477         }
 478
 479         lbs_deb_leave(LBS_DEB_CMD);
 480         return ret;
 481 }
 482
 483 /**
 484  *  @brief Set the TX power
 485  *
 486  *  @param priv         A pointer to struct lbs_private structure
 487  *  @param dbm          The desired power level in dBm
 488  *
 489  *  @return             0 on success, error on failure
 490  */
 491 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 492 {
 493         struct cmd_ds_802_11_rf_tx_power cmd;
 494         int ret;
 495
 496         lbs_deb_enter(LBS_DEB_CMD);
 497
 498         memset(&cmd, 0, sizeof(cmd));
 499         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 500         cmd.action = cpu_to_le16(CMD_ACT_SET);
 501         cmd.curlevel = cpu_to_le16(dbm);
 502
 503         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 504
 505         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 506
 507         lbs_deb_leave(LBS_DEB_CMD);
 508         return ret;
 509 }
 510
 511 static int lbs_cmd_802_11_monitor_mode(struct cmd_ds_command *cmd,
 512                                       u16 cmd_action, void *pdata_buf)
 513 {
 514         struct cmd_ds_802_11_monitor_mode *monitor = &cmd->params.monitor;
 515
 516         cmd->command = cpu_to_le16(CMD_802_11_MONITOR_MODE);
 517         cmd->size =
 518             cpu_to_le16(sizeof(struct cmd_ds_802_11_monitor_mode) +
 519                              sizeof(struct cmd_header));
 520
 521         monitor->action = cpu_to_le16(cmd_action);
 522         if (cmd_action == CMD_ACT_SET) {
 523                 monitor->mode =
 524                     cpu_to_le16((u16) (*(u32 *) pdata_buf));
 525         }
 526
 527         return 0;
 528 }
 529
 530 /**
 531  *  @brief Get the radio channel
 532  *
 533  *  @param priv         A pointer to struct lbs_private structure
 534  *
 535  *  @return             The channel on success, error on failure
 536  */
 537 static int lbs_get_channel(struct lbs_private *priv)
 538 {
 539         struct cmd_ds_802_11_rf_channel cmd;
 540         int ret = 0;
 541
 542         lbs_deb_enter(LBS_DEB_CMD);
 543
 544         memset(&cmd, 0, sizeof(cmd));
 545         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 546         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 547
 548         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 549         if (ret)
 550                 goto out;
 551
 552         ret = le16_to_cpu(cmd.channel);
 553         lbs_deb_cmd("current radio channel is %d\n", ret);
 554
 555 out:
 556         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 557         return ret;
 558 }
 559
 560 int lbs_update_channel(struct lbs_private *priv)
 561 {
 562         int ret;
 563
 564         /* the channel in f/w could be out of sync; get the current channel */
 565         lbs_deb_enter(LBS_DEB_ASSOC);
 566
 567         ret = lbs_get_channel(priv);
 568         if (ret > 0) {
 569                 priv->channel = ret;
 570                 ret = 0;
 571         }
 572         lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
 573         return ret;
 574 }
 575
 576 /**
 577  *  @brief Set the radio channel
 578  *
 579  *  @param priv         A pointer to struct lbs_private structure
 580  *  @param channel      The desired channel, or 0 to clear a locked channel
 581  *
 582  *  @return             0 on success, error on failure
 583  */
 584 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 585 {
 586         struct cmd_ds_802_11_rf_channel cmd;
 587 #ifdef DEBUG
 588         u8 old_channel = priv->channel;
 589 #endif
 590         int ret = 0;
 591
 592         lbs_deb_enter(LBS_DEB_CMD);
 593
 594         memset(&cmd, 0, sizeof(cmd));
 595         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 596         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 597         cmd.channel = cpu_to_le16(channel);
 598
 599         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 600         if (ret)
 601                 goto out;
 602
 603         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 604         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 605                 priv->channel);
 606
 607 out:
 608         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 609         return ret;
 610 }
 611
 612 static int lbs_cmd_reg_access(struct cmd_ds_command *cmdptr,
 613                                u8 cmd_action, void *pdata_buf)
 614 {
 615         struct lbs_offset_value *offval;
 616
 617         lbs_deb_enter(LBS_DEB_CMD);
 618
 619         offval = (struct lbs_offset_value *)pdata_buf;
 620
 621         switch (le16_to_cpu(cmdptr->command)) {
 622         case CMD_MAC_REG_ACCESS:
 623                 {
 624                         struct cmd_ds_mac_reg_access *macreg;
 625
 626                         cmdptr->size =
 627                             cpu_to_le16(sizeof (struct cmd_ds_mac_reg_access)
 628                                         + sizeof(struct cmd_header));
 629                         macreg =
 630                             (struct cmd_ds_mac_reg_access *)&cmdptr->params.
 631                             macreg;
 632
 633                         macreg->action = cpu_to_le16(cmd_action);
 634                         macreg->offset = cpu_to_le16((u16) offval->offset);
 635                         macreg->value = cpu_to_le32(offval->value);
 636
 637                         break;
 638                 }
 639
 640         case CMD_BBP_REG_ACCESS:
 641                 {
 642                         struct cmd_ds_bbp_reg_access *bbpreg;
 643
 644                         cmdptr->size =
 645                             cpu_to_le16(sizeof
 646                                              (struct cmd_ds_bbp_reg_access)
 647                                              + sizeof(struct cmd_header));
 648                         bbpreg =
 649                             (struct cmd_ds_bbp_reg_access *)&cmdptr->params.
 650                             bbpreg;
 651
 652                         bbpreg->action = cpu_to_le16(cmd_action);
 653                         bbpreg->offset = cpu_to_le16((u16) offval->offset);
 654                         bbpreg->value = (u8) offval->value;
 655
 656                         break;
 657                 }
 658
 659         case CMD_RF_REG_ACCESS:
 660                 {
 661                         struct cmd_ds_rf_reg_access *rfreg;
 662
 663                         cmdptr->size =
 664                             cpu_to_le16(sizeof
 665                                              (struct cmd_ds_rf_reg_access) +
 666                                              sizeof(struct cmd_header));
 667                         rfreg =
 668                             (struct cmd_ds_rf_reg_access *)&cmdptr->params.
 669                             rfreg;
 670
 671                         rfreg->action = cpu_to_le16(cmd_action);
 672                         rfreg->offset = cpu_to_le16((u16) offval->offset);
 673                         rfreg->value = (u8) offval->value;
 674
 675                         break;
 676                 }
 677
 678         default:
 679                 break;
 680         }
 681
 682         lbs_deb_leave(LBS_DEB_CMD);
 683         return 0;
 684 }
 685
 686 static void lbs_queue_cmd(struct lbs_private *priv,
 687                           struct cmd_ctrl_node *cmdnode)
 688 {
 689         unsigned long flags;
 690         int addtail = 1;
 691
 692         lbs_deb_enter(LBS_DEB_HOST);
 693
 694         if (!cmdnode) {
 695                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 696                 goto done;
 697         }
 698         if (!cmdnode->cmdbuf->size) {
 699                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 700                 goto done;
 701         }
 702         cmdnode->result = 0;
 703
 704         /* Exit_PS command needs to be queued in the header always. */
 705         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 706                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf[1];
 707
 708                 if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
 709                         if (priv->psstate != PS_STATE_FULL_POWER)
 710                                 addtail = 0;
 711                 }
 712         }
 713
 714         spin_lock_irqsave(&priv->driver_lock, flags);
 715
 716         if (addtail)
 717                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 718         else
 719                 list_add(&cmdnode->list, &priv->cmdpendingq);
 720
 721         spin_unlock_irqrestore(&priv->driver_lock, flags);
 722
 723         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 724                      le16_to_cpu(cmdnode->cmdbuf->command));
 725
 726 done:
 727         lbs_deb_leave(LBS_DEB_HOST);
 728 }
 729
 730 static void lbs_submit_command(struct lbs_private *priv,
 731                                struct cmd_ctrl_node *cmdnode)
 732 {
 733         unsigned long flags;
 734         struct cmd_header *cmd;
 735         uint16_t cmdsize;
 736         uint16_t command;
 737         int timeo = 3 * HZ;
 738         int ret;
 739
 740         lbs_deb_enter(LBS_DEB_HOST);
 741
 742         cmd = cmdnode->cmdbuf;
 743
 744         spin_lock_irqsave(&priv->driver_lock, flags);
 745         priv->cur_cmd = cmdnode;
 746         priv->cur_cmd_retcode = 0;
 747         spin_unlock_irqrestore(&priv->driver_lock, flags);
 748
 749         cmdsize = le16_to_cpu(cmd->size);
 750         command = le16_to_cpu(cmd->command);
 751
 752         /* These commands take longer */
 753         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 754                 timeo = 5 * HZ;
 755
 756         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 757                      command, le16_to_cpu(cmd->seqnum), cmdsize);
 758         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 759
 760         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 761
 762         if (ret) {
 763                 lbs_pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
 764                 /* Let the timer kick in and retry, and potentially reset
 765                    the whole thing if the condition persists */
 766                 timeo = HZ/4;
 767         }
 768
 769         if (command == CMD_802_11_DEEP_SLEEP) {
 770                 if (priv->is_auto_deep_sleep_enabled) {
 771                         priv->wakeup_dev_required = 1;
 772                         priv->dnld_sent = 0;
 773                 }
 774                 priv->is_deep_sleep = 1;
 775                 lbs_complete_command(priv, cmdnode, 0);
 776         } else {
 777                 /* Setup the timer after transmit command */
 778                 mod_timer(&priv->command_timer, jiffies + timeo);
 779         }
 780
 781         lbs_deb_leave(LBS_DEB_HOST);
 782 }
 783
 784 /**
 785  *  This function inserts command node to cmdfreeq
 786  *  after cleans it. Requires priv->driver_lock held.
 787  */
 788 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 789                                          struct cmd_ctrl_node *cmdnode)
 790 {
 791         lbs_deb_enter(LBS_DEB_HOST);
 792
 793         if (!cmdnode)
 794                 goto out;
 795
 796         cmdnode->callback = NULL;
 797         cmdnode->callback_arg = 0;
 798
 799         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
 800
 801         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 802  out:
 803         lbs_deb_leave(LBS_DEB_HOST);
 804 }
 805
 806 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 807         struct cmd_ctrl_node *ptempcmd)
 808 {
 809         unsigned long flags;
 810
 811         spin_lock_irqsave(&priv->driver_lock, flags);
 812         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
 813         spin_unlock_irqrestore(&priv->driver_lock, flags);
 814 }
 815
 816 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
 817                           int result)
 818 {
 819         if (cmd == priv->cur_cmd)
 820                 priv->cur_cmd_retcode = result;
 821
 822         cmd->result = result;
 823         cmd->cmdwaitqwoken = 1;
 824         wake_up_interruptible(&cmd->cmdwait_q);
 825
 826         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
 827                 __lbs_cleanup_and_insert_cmd(priv, cmd);
 828         priv->cur_cmd = NULL;
 829 }
 830
 831 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
 832 {
 833         struct cmd_ds_802_11_radio_control cmd;
 834         int ret = -EINVAL;
 835
 836         lbs_deb_enter(LBS_DEB_CMD);
 837
 838         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 839         cmd.action = cpu_to_le16(CMD_ACT_SET);
 840
 841         /* Only v8 and below support setting the preamble */
 842         if (priv->fwrelease < 0x09000000) {
 843                 switch (preamble) {
 844                 case RADIO_PREAMBLE_SHORT:
 845                         if (!(priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE))
 846                                 goto out;
 847                         /* Fall through */
 848                 case RADIO_PREAMBLE_AUTO:
 849                 case RADIO_PREAMBLE_LONG:
 850                         cmd.control = cpu_to_le16(preamble);
 851                         break;
 852                 default:
 853                         goto out;
 854                 }
 855         }
 856
 857         if (radio_on)
 858                 cmd.control |= cpu_to_le16(0x1);
 859         else {
 860                 cmd.control &= cpu_to_le16(~0x1);
 861                 priv->txpower_cur = 0;
 862         }
 863
 864         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
 865                     radio_on ? "ON" : "OFF", preamble);
 866
 867         priv->radio_on = radio_on;
 868
 869         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
 870
 871 out:
 872         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 873         return ret;
 874 }
 875
 876 void lbs_set_mac_control(struct lbs_private *priv)
 877 {
 878         struct cmd_ds_mac_control cmd;
 879
 880         lbs_deb_enter(LBS_DEB_CMD);
 881
 882         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 883         cmd.action = cpu_to_le16(priv->mac_control);
 884         cmd.reserved = 0;
 885
 886         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
 887
 888         lbs_deb_leave(LBS_DEB_CMD);
 889 }
 890
 891 /**
 892  *  @brief This function prepare the command before send to firmware.
 893  *
 894  *  @param priv         A pointer to struct lbs_private structure
 895  *  @param cmd_no       command number
 896  *  @param cmd_action   command action: GET or SET
 897  *  @param wait_option  wait option: wait response or not
 898  *  @param cmd_oid      cmd oid: treated as sub command
 899  *  @param pdata_buf    A pointer to informaion buffer
 900  *  @return             0 or -1
 901  */
 902 int lbs_prepare_and_send_command(struct lbs_private *priv,
 903                           u16 cmd_no,
 904                           u16 cmd_action,
 905                           u16 wait_option, u32 cmd_oid, void *pdata_buf)
 906 {
 907         int ret = 0;
 908         struct cmd_ctrl_node *cmdnode;
 909         struct cmd_ds_command *cmdptr;
 910         unsigned long flags;
 911
 912         lbs_deb_enter(LBS_DEB_HOST);
 913
 914         if (!priv) {
 915                 lbs_deb_host("PREP_CMD: priv is NULL\n");
 916                 ret = -1;
 917                 goto done;
 918         }
 919
 920         if (priv->surpriseremoved) {
 921                 lbs_deb_host("PREP_CMD: card removed\n");
 922                 ret = -1;
 923                 goto done;
 924         }
 925
 926         if (!lbs_is_cmd_allowed(priv)) {
 927                 ret = -EBUSY;
 928                 goto done;
 929         }
 930
 931         cmdnode = lbs_get_cmd_ctrl_node(priv);
 932
 933         if (cmdnode == NULL) {
 934                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
 935
 936                 /* Wake up main thread to execute next command */
 937                 wake_up_interruptible(&priv->waitq);
 938                 ret = -1;
 939                 goto done;
 940         }
 941
 942         cmdnode->callback = NULL;
 943         cmdnode->callback_arg = (unsigned long)pdata_buf;
 944
 945         cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
 946
 947         lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
 948
 949         /* Set sequence number, command and INT option */
 950         priv->seqnum++;
 951         cmdptr->seqnum = cpu_to_le16(priv->seqnum);
 952
 953         cmdptr->command = cpu_to_le16(cmd_no);
 954         cmdptr->result = 0;
 955
 956         switch (cmd_no) {
 957         case CMD_802_11_PS_MODE:
 958                 ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
 959                 break;
 960
 961         case CMD_MAC_REG_ACCESS:
 962         case CMD_BBP_REG_ACCESS:
 963         case CMD_RF_REG_ACCESS:
 964                 ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
 965                 break;
 966
 967         case CMD_802_11_MONITOR_MODE:
 968                 ret = lbs_cmd_802_11_monitor_mode(cmdptr,
 969                                           cmd_action, pdata_buf);
 970                 break;
 971
 972         case CMD_802_11_RSSI:
 973                 ret = lbs_cmd_802_11_rssi(priv, cmdptr);
 974                 break;
 975
 976         case CMD_802_11_SET_AFC:
 977         case CMD_802_11_GET_AFC:
 978
 979                 cmdptr->command = cpu_to_le16(cmd_no);
 980                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
 981                                            sizeof(struct cmd_header));
 982
 983                 memmove(&cmdptr->params.afc,
 984                         pdata_buf, sizeof(struct cmd_ds_802_11_afc));
 985
 986                 ret = 0;
 987                 goto done;
 988
 989         case CMD_802_11_TPC_CFG:
 990                 cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
 991                 cmdptr->size =
 992                     cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
 993                                      sizeof(struct cmd_header));
 994
 995                 memmove(&cmdptr->params.tpccfg,
 996                         pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
 997
 998                 ret = 0;
 999                 break;
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         case CMD_802_11_BEACON_CTRL:
1010                 ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
1011                 break;
1012         case CMD_802_11_DEEP_SLEEP:
1013                 cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
1014                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
1015                 break;
1016         default:
1017                 lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
1018                 ret = -1;
1019                 break;
1020         }
1021
1022         /* return error, since the command preparation failed */
1023         if (ret != 0) {
1024                 lbs_deb_host("PREP_CMD: command preparation failed\n");
1025                 lbs_cleanup_and_insert_cmd(priv, cmdnode);
1026                 ret = -1;
1027                 goto done;
1028         }
1029
1030         cmdnode->cmdwaitqwoken = 0;
1031
1032         lbs_queue_cmd(priv, cmdnode);
1033         wake_up_interruptible(&priv->waitq);
1034
1035         if (wait_option & CMD_OPTION_WAITFORRSP) {
1036                 lbs_deb_host("PREP_CMD: wait for response\n");
1037                 might_sleep();
1038                 wait_event_interruptible(cmdnode->cmdwait_q,
1039                                          cmdnode->cmdwaitqwoken);
1040         }
1041
1042         spin_lock_irqsave(&priv->driver_lock, flags);
1043         if (priv->cur_cmd_retcode) {
1044                 lbs_deb_host("PREP_CMD: command failed with return code %d\n",
1045                        priv->cur_cmd_retcode);
1046                 priv->cur_cmd_retcode = 0;
1047                 ret = -1;
1048         }
1049         spin_unlock_irqrestore(&priv->driver_lock, flags);
1050
1051 done:
1052         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1053         return ret;
1054 }
1055
1056 /**
1057  *  @brief This function allocates the command buffer and link
1058  *  it to command free queue.
1059  *
1060  *  @param priv         A pointer to struct lbs_private structure
1061  *  @return             0 or -1
1062  */
1063 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1064 {
1065         int ret = 0;
1066         u32 bufsize;
1067         u32 i;
1068         struct cmd_ctrl_node *cmdarray;
1069
1070         lbs_deb_enter(LBS_DEB_HOST);
1071
1072         /* Allocate and initialize the command array */
1073         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1074         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1075                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1076                 ret = -1;
1077                 goto done;
1078         }
1079         priv->cmd_array = cmdarray;
1080
1081         /* Allocate and initialize each command buffer in the command array */
1082         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1083                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1084                 if (!cmdarray[i].cmdbuf) {
1085                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1086                         ret = -1;
1087                         goto done;
1088                 }
1089         }
1090
1091         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1092                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1093                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1094         }
1095         ret = 0;
1096
1097 done:
1098         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1099         return ret;
1100 }
1101
1102 /**
1103  *  @brief This function frees the command buffer.
1104  *
1105  *  @param priv         A pointer to struct lbs_private structure
1106  *  @return             0 or -1
1107  */
1108 int lbs_free_cmd_buffer(struct lbs_private *priv)
1109 {
1110         struct cmd_ctrl_node *cmdarray;
1111         unsigned int i;
1112
1113         lbs_deb_enter(LBS_DEB_HOST);
1114
1115         /* need to check if cmd array is allocated or not */
1116         if (priv->cmd_array == NULL) {
1117                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1118                 goto done;
1119         }
1120
1121         cmdarray = priv->cmd_array;
1122
1123         /* Release shared memory buffers */
1124         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1125                 if (cmdarray[i].cmdbuf) {
1126                         kfree(cmdarray[i].cmdbuf);
1127                         cmdarray[i].cmdbuf = NULL;
1128                 }
1129         }
1130
1131         /* Release cmd_ctrl_node */
1132         if (priv->cmd_array) {
1133                 kfree(priv->cmd_array);
1134                 priv->cmd_array = NULL;
1135         }
1136
1137 done:
1138         lbs_deb_leave(LBS_DEB_HOST);
1139         return 0;
1140 }
1141
1142 /**
1143  *  @brief This function gets a free command node if available in
1144  *  command free queue.
1145  *
1146  *  @param priv         A pointer to struct lbs_private structure
1147  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1148  */
1149 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv)
1150 {
1151         struct cmd_ctrl_node *tempnode;
1152         unsigned long flags;
1153
1154         lbs_deb_enter(LBS_DEB_HOST);
1155
1156         if (!priv)
1157                 return NULL;
1158
1159         spin_lock_irqsave(&priv->driver_lock, flags);
1160
1161         if (!list_empty(&priv->cmdfreeq)) {
1162                 tempnode = list_first_entry(&priv->cmdfreeq,
1163                                             struct cmd_ctrl_node, list);
1164                 list_del(&tempnode->list);
1165         } else {
1166                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1167                 tempnode = NULL;
1168         }
1169
1170         spin_unlock_irqrestore(&priv->driver_lock, flags);
1171
1172         lbs_deb_leave(LBS_DEB_HOST);
1173         return tempnode;
1174 }
1175
1176 /**
1177  *  @brief This function executes next command in command
1178  *  pending queue. It will put firmware back to PS mode
1179  *  if applicable.
1180  *
1181  *  @param priv     A pointer to struct lbs_private structure
1182  *  @return        0 or -1
1183  */
1184 int lbs_execute_next_command(struct lbs_private *priv)
1185 {
1186         struct cmd_ctrl_node *cmdnode = NULL;
1187         struct cmd_header *cmd;
1188         unsigned long flags;
1189         int ret = 0;
1190
1191         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1192          * only caller to us is lbs_thread() and we get even when a
1193          * data packet is received */
1194         lbs_deb_enter(LBS_DEB_THREAD);
1195
1196         spin_lock_irqsave(&priv->driver_lock, flags);
1197
1198         if (priv->cur_cmd) {
1199                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1200                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1201                 ret = -1;
1202                 goto done;
1203         }
1204
1205         if (!list_empty(&priv->cmdpendingq)) {
1206                 cmdnode = list_first_entry(&priv->cmdpendingq,
1207                                            struct cmd_ctrl_node, list);
1208         }
1209
1210         spin_unlock_irqrestore(&priv->driver_lock, flags);
1211
1212         if (cmdnode) {
1213                 cmd = cmdnode->cmdbuf;
1214
1215                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1216                         if ((priv->psstate == PS_STATE_SLEEP) ||
1217                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1218                                 lbs_deb_host(
1219                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1220                                        le16_to_cpu(cmd->command),
1221                                        priv->psstate);
1222                                 ret = -1;
1223                                 goto done;
1224                         }
1225                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1226                                      "0x%04x in psstate %d\n",
1227                                      le16_to_cpu(cmd->command), priv->psstate);
1228                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1229                         /*
1230                          * 1. Non-PS command:
1231                          * Queue it. set needtowakeup to TRUE if current state
1232                          * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
1233                          * 2. PS command but not Exit_PS:
1234                          * Ignore it.
1235                          * 3. PS command Exit_PS:
1236                          * Set needtowakeup to TRUE if current state is SLEEP,
1237                          * otherwise send this command down to firmware
1238                          * immediately.
1239                          */
1240                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1241                                 /*  Prepare to send Exit PS,
1242                                  *  this non PS command will be sent later */
1243                                 if ((priv->psstate == PS_STATE_SLEEP)
1244                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1245                                     ) {
1246                                         /* w/ new scheme, it will not reach here.
1247                                            since it is blocked in main_thread. */
1248                                         priv->needtowakeup = 1;
1249                                 } else
1250                                         lbs_ps_wakeup(priv, 0);
1251
1252                                 ret = 0;
1253                                 goto done;
1254                         } else {
1255                                 /*
1256                                  * PS command. Ignore it if it is not Exit_PS.
1257                                  * otherwise send it down immediately.
1258                                  */
1259                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1260
1261                                 lbs_deb_host(
1262                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1263                                        psm->action);
1264                                 if (psm->action !=
1265                                     cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
1266                                         lbs_deb_host(
1267                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1268                                         list_del(&cmdnode->list);
1269                                         spin_lock_irqsave(&priv->driver_lock, flags);
1270                                         lbs_complete_command(priv, cmdnode, 0);
1271                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1272
1273                                         ret = 0;
1274                                         goto done;
1275                                 }
1276
1277                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1278                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1279                                         lbs_deb_host(
1280                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1281                                         list_del(&cmdnode->list);
1282                                         spin_lock_irqsave(&priv->driver_lock, flags);
1283                                         lbs_complete_command(priv, cmdnode, 0);
1284                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1285                                         priv->needtowakeup = 1;
1286
1287                                         ret = 0;
1288                                         goto done;
1289                                 }
1290
1291                                 lbs_deb_host(
1292                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1293                         }
1294                 }
1295                 list_del(&cmdnode->list);
1296                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1297                             le16_to_cpu(cmd->command));
1298                 lbs_submit_command(priv, cmdnode);
1299         } else {
1300                 /*
1301                  * check if in power save mode, if yes, put the device back
1302                  * to PS mode
1303                  */
1304                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1305                     (priv->psstate == PS_STATE_FULL_POWER) &&
1306                     ((priv->connect_status == LBS_CONNECTED) ||
1307                     lbs_mesh_connected(priv))) {
1308                         if (priv->secinfo.WPAenabled ||
1309                             priv->secinfo.WPA2enabled) {
1310                                 /* check for valid WPA group keys */
1311                                 if (priv->wpa_mcast_key.len ||
1312                                     priv->wpa_unicast_key.len) {
1313                                         lbs_deb_host(
1314                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1315                                                " go back to PS_SLEEP");
1316                                         lbs_ps_sleep(priv, 0);
1317                                 }
1318                         } else {
1319                                 lbs_deb_host(
1320                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1321                                        "go back to PS_SLEEP");
1322                                 lbs_ps_sleep(priv, 0);
1323                         }
1324                 }
1325         }
1326
1327         ret = 0;
1328 done:
1329         lbs_deb_leave(LBS_DEB_THREAD);
1330         return ret;
1331 }
1332
1333 static void lbs_send_confirmsleep(struct lbs_private *priv)
1334 {
1335         unsigned long flags;
1336         int ret;
1337
1338         lbs_deb_enter(LBS_DEB_HOST);
1339         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1340                 sizeof(confirm_sleep));
1341
1342         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1343                 sizeof(confirm_sleep));
1344         if (ret) {
1345                 lbs_pr_alert("confirm_sleep failed\n");
1346                 goto out;
1347         }
1348
1349         spin_lock_irqsave(&priv->driver_lock, flags);
1350
1351         /* We don't get a response on the sleep-confirmation */
1352         priv->dnld_sent = DNLD_RES_RECEIVED;
1353
1354         /* If nothing to do, go back to sleep (?) */
1355         if (!__kfifo_len(priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1356                 priv->psstate = PS_STATE_SLEEP;
1357
1358         spin_unlock_irqrestore(&priv->driver_lock, flags);
1359
1360 out:
1361         lbs_deb_leave(LBS_DEB_HOST);
1362 }
1363
1364 void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
1365 {
1366         lbs_deb_enter(LBS_DEB_HOST);
1367
1368         /*
1369          * PS is currently supported only in Infrastructure mode
1370          * Remove this check if it is to be supported in IBSS mode also
1371          */
1372
1373         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1374                               CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
1375
1376         lbs_deb_leave(LBS_DEB_HOST);
1377 }
1378
1379 /**
1380  *  @brief This function sends Exit_PS command to firmware.
1381  *
1382  *  @param priv         A pointer to struct lbs_private structure
1383  *  @param wait_option  wait response or not
1384  *  @return             n/a
1385  */
1386 void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
1387 {
1388         __le32 Localpsmode;
1389
1390         lbs_deb_enter(LBS_DEB_HOST);
1391
1392         Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
1393
1394         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1395                               CMD_SUBCMD_EXIT_PS,
1396                               wait_option, 0, &Localpsmode);
1397
1398         lbs_deb_leave(LBS_DEB_HOST);
1399 }
1400
1401 /**
1402  *  @brief This function checks condition and prepares to
1403  *  send sleep confirm command to firmware if ok.
1404  *
1405  *  @param priv         A pointer to struct lbs_private structure
1406  *  @param psmode       Power Saving mode
1407  *  @return             n/a
1408  */
1409 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1410 {
1411         unsigned long flags =0;
1412         int allowed = 1;
1413
1414         lbs_deb_enter(LBS_DEB_HOST);
1415
1416         spin_lock_irqsave(&priv->driver_lock, flags);
1417         if (priv->dnld_sent) {
1418                 allowed = 0;
1419                 lbs_deb_host("dnld_sent was set\n");
1420         }
1421
1422         /* In-progress command? */
1423         if (priv->cur_cmd) {
1424                 allowed = 0;
1425                 lbs_deb_host("cur_cmd was set\n");
1426         }
1427
1428         /* Pending events or command responses? */
1429         if (__kfifo_len(priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1430                 allowed = 0;
1431                 lbs_deb_host("pending events or command responses\n");
1432         }
1433         spin_unlock_irqrestore(&priv->driver_lock, flags);
1434
1435         if (allowed) {
1436                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1437                 lbs_send_confirmsleep(priv);
1438         } else {
1439                 lbs_deb_host("sleep confirm has been delayed\n");
1440         }
1441
1442         lbs_deb_leave(LBS_DEB_HOST);
1443 }
1444
1445
1446 /**
1447  * @brief Configures the transmission power control functionality.
1448  *
1449  * @param priv          A pointer to struct lbs_private structure
1450  * @param enable        Transmission power control enable
1451  * @param p0            Power level when link quality is good (dBm).
1452  * @param p1            Power level when link quality is fair (dBm).
1453  * @param p2            Power level when link quality is poor (dBm).
1454  * @param usesnr        Use Signal to Noise Ratio in TPC
1455  *
1456  * @return 0 on success
1457  */
1458 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1459                 int8_t p2, int usesnr)
1460 {
1461         struct cmd_ds_802_11_tpc_cfg cmd;
1462         int ret;
1463
1464         memset(&cmd, 0, sizeof(cmd));
1465         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1466         cmd.action = cpu_to_le16(CMD_ACT_SET);
1467         cmd.enable = !!enable;
1468         cmd.usesnr = !!usesnr;
1469         cmd.P0 = p0;
1470         cmd.P1 = p1;
1471         cmd.P2 = p2;
1472
1473         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1474
1475         return ret;
1476 }
1477
1478 /**
1479  * @brief Configures the power adaptation settings.
1480  *
1481  * @param priv          A pointer to struct lbs_private structure
1482  * @param enable        Power adaptation enable
1483  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1484  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1485  * @param p2            Power level for 48 and 54 Mbps (dBm).
1486  *
1487  * @return 0 on Success
1488  */
1489
1490 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1491                 int8_t p1, int8_t p2)
1492 {
1493         struct cmd_ds_802_11_pa_cfg cmd;
1494         int ret;
1495
1496         memset(&cmd, 0, sizeof(cmd));
1497         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1498         cmd.action = cpu_to_le16(CMD_ACT_SET);
1499         cmd.enable = !!enable;
1500         cmd.P0 = p0;
1501         cmd.P1 = p1;
1502         cmd.P2 = p2;
1503
1504         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1505
1506         return ret;
1507 }
1508
1509
1510 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1511         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1512         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1513         unsigned long callback_arg)
1514 {
1515         struct cmd_ctrl_node *cmdnode;
1516
1517         lbs_deb_enter(LBS_DEB_HOST);
1518
1519         if (priv->surpriseremoved) {
1520                 lbs_deb_host("PREP_CMD: card removed\n");
1521                 cmdnode = ERR_PTR(-ENOENT);
1522                 goto done;
1523         }
1524
1525         if (!lbs_is_cmd_allowed(priv)) {
1526                 cmdnode = ERR_PTR(-EBUSY);
1527                 goto done;
1528         }
1529
1530         cmdnode = lbs_get_cmd_ctrl_node(priv);
1531         if (cmdnode == NULL) {
1532                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1533
1534                 /* Wake up main thread to execute next command */
1535                 wake_up_interruptible(&priv->waitq);
1536                 cmdnode = ERR_PTR(-ENOBUFS);
1537                 goto done;
1538         }
1539
1540         cmdnode->callback = callback;
1541         cmdnode->callback_arg = callback_arg;
1542
1543         /* Copy the incoming command to the buffer */
1544         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1545
1546         /* Set sequence number, clean result, move to buffer */
1547         priv->seqnum++;
1548         cmdnode->cmdbuf->command = cpu_to_le16(command);
1549         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1550         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1551         cmdnode->cmdbuf->result  = 0;
1552
1553         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1554
1555         cmdnode->cmdwaitqwoken = 0;
1556         lbs_queue_cmd(priv, cmdnode);
1557         wake_up_interruptible(&priv->waitq);
1558
1559  done:
1560         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1561         return cmdnode;
1562 }
1563
1564 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1565         struct cmd_header *in_cmd, int in_cmd_size)
1566 {
1567         lbs_deb_enter(LBS_DEB_CMD);
1568         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1569                 lbs_cmd_async_callback, 0);
1570         lbs_deb_leave(LBS_DEB_CMD);
1571 }
1572
1573 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1574               struct cmd_header *in_cmd, int in_cmd_size,
1575               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1576               unsigned long callback_arg)
1577 {
1578         struct cmd_ctrl_node *cmdnode;
1579         unsigned long flags;
1580         int ret = 0;
1581
1582         lbs_deb_enter(LBS_DEB_HOST);
1583
1584         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1585                                   callback, callback_arg);
1586         if (IS_ERR(cmdnode)) {
1587                 ret = PTR_ERR(cmdnode);
1588                 goto done;
1589         }
1590
1591         might_sleep();
1592         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1593
1594         spin_lock_irqsave(&priv->driver_lock, flags);
1595         ret = cmdnode->result;
1596         if (ret)
1597                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1598                             command, ret);
1599
1600         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1601         spin_unlock_irqrestore(&priv->driver_lock, flags);
1602
1603 done:
1604         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1605         return ret;
1606 }
1607 EXPORT_SYMBOL_GPL(__lbs_cmd);