SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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         /* Determine mesh_fw_ver from fwrelease and fwcapinfo */
 147         /* 5.0.16p0 9.0.0.p0 is known to NOT support any mesh */
 148         /* 5.110.22 have mesh command with 0xa3 command id */
 149         /* 10.0.0.p0 FW brings in mesh config command with different id */
 150         /* Check FW version MSB and initialize mesh_fw_ver */
 151         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
 152                 priv->mesh_fw_ver = MESH_FW_OLD;
 153         else if ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
 154                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK))
 155                 priv->mesh_fw_ver = MESH_FW_NEW;
 156         else
 157                 priv->mesh_fw_ver = MESH_NONE;
 158
 159         /* Clamp region code to 8-bit since FW spec indicates that it should
 160          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 161          * returns non-zero high 8 bits here.
 162          *
 163          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 164          * need to check for this problem and handle it properly.
 165          */
 166         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 167                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 168         else
 169                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 170
 171         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 172                 /* use the region code to search for the index */
 173                 if (priv->regioncode == lbs_region_code_to_index[i])
 174                         break;
 175         }
 176
 177         /* if it's unidentified region code, use the default (USA) */
 178         if (i >= MRVDRV_MAX_REGION_CODE) {
 179                 priv->regioncode = 0x10;
 180                 lbs_pr_info("unidentified region code; using the default (USA)\n");
 181         }
 182
 183         if (priv->current_addr[0] == 0xff)
 184                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 185
 186         memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 187         if (priv->mesh_dev)
 188                 memcpy(priv->mesh_dev->dev_addr, priv->current_addr, ETH_ALEN);
 189
 190         if (lbs_set_regiontable(priv, priv->regioncode, 0)) {
 191                 ret = -1;
 192                 goto out;
 193         }
 194
 195 out:
 196         lbs_deb_leave(LBS_DEB_CMD);
 197         return ret;
 198 }
 199
 200 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 201                 struct wol_config *p_wol_config)
 202 {
 203         struct cmd_ds_host_sleep cmd_config;
 204         int ret;
 205
 206         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 207         cmd_config.criteria = cpu_to_le32(criteria);
 208         cmd_config.gpio = priv->wol_gpio;
 209         cmd_config.gap = priv->wol_gap;
 210
 211         if (p_wol_config != NULL)
 212                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 213                                 sizeof(struct wol_config));
 214         else
 215                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 216
 217         ret = lbs_cmd_with_response(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config);
 218         if (!ret) {
 219                 if (criteria) {
 220                         lbs_deb_cmd("Set WOL criteria to %x\n", criteria);
 221                         priv->wol_criteria = criteria;
 222                 } else
 223                         memcpy((uint8_t *) p_wol_config,
 224                                         (uint8_t *)&cmd_config.wol_conf,
 225                                         sizeof(struct wol_config));
 226         } else {
 227                 lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
 228         }
 229
 230         return ret;
 231 }
 232 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 233
 234 static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
 235                                    u16 cmd_action)
 236 {
 237         struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
 238
 239         lbs_deb_enter(LBS_DEB_CMD);
 240
 241         cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
 242         cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
 243                                 sizeof(struct cmd_header));
 244         psm->action = cpu_to_le16(cmd_action);
 245         psm->multipledtim = 0;
 246         switch (cmd_action) {
 247         case CMD_SUBCMD_ENTER_PS:
 248                 lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
 249
 250                 psm->locallisteninterval = 0;
 251                 psm->nullpktinterval = 0;
 252                 psm->multipledtim =
 253                     cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
 254                 break;
 255
 256         case CMD_SUBCMD_EXIT_PS:
 257                 lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
 258                 break;
 259
 260         case CMD_SUBCMD_SLEEP_CONFIRMED:
 261                 lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
 262                 break;
 263
 264         default:
 265                 break;
 266         }
 267
 268         lbs_deb_leave(LBS_DEB_CMD);
 269         return 0;
 270 }
 271
 272 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 273                                 struct sleep_params *sp)
 274 {
 275         struct cmd_ds_802_11_sleep_params cmd;
 276         int ret;
 277
 278         lbs_deb_enter(LBS_DEB_CMD);
 279
 280         if (cmd_action == CMD_ACT_GET) {
 281                 memset(&cmd, 0, sizeof(cmd));
 282         } else {
 283                 cmd.error = cpu_to_le16(sp->sp_error);
 284                 cmd.offset = cpu_to_le16(sp->sp_offset);
 285                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 286                 cmd.calcontrol = sp->sp_calcontrol;
 287                 cmd.externalsleepclk = sp->sp_extsleepclk;
 288                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 289         }
 290         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 291         cmd.action = cpu_to_le16(cmd_action);
 292
 293         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 294
 295         if (!ret) {
 296                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 297                             "calcontrol 0x%x extsleepclk 0x%x\n",
 298                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 299                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 300                             cmd.externalsleepclk);
 301
 302                 sp->sp_error = le16_to_cpu(cmd.error);
 303                 sp->sp_offset = le16_to_cpu(cmd.offset);
 304                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 305                 sp->sp_calcontrol = cmd.calcontrol;
 306                 sp->sp_extsleepclk = cmd.externalsleepclk;
 307                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 308         }
 309
 310         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 311         return 0;
 312 }
 313
 314 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 315 {
 316         int ret = 0;
 317
 318         lbs_deb_enter(LBS_DEB_CMD);
 319
 320         if (priv->is_deep_sleep) {
 321                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 322                                         !priv->is_deep_sleep, (10 * HZ))) {
 323                         lbs_pr_err("ds_awake_q: timer expired\n");
 324                         ret = -1;
 325                 }
 326         }
 327
 328         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 329         return ret;
 330 }
 331
 332 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 333 {
 334         int ret =  0;
 335
 336         lbs_deb_enter(LBS_DEB_CMD);
 337
 338         if (deep_sleep) {
 339                 if (priv->is_deep_sleep != 1) {
 340                         lbs_deb_cmd("deep sleep: sleep\n");
 341                         BUG_ON(!priv->enter_deep_sleep);
 342                         ret = priv->enter_deep_sleep(priv);
 343                         if (!ret) {
 344                                 netif_stop_queue(priv->dev);
 345                                 netif_carrier_off(priv->dev);
 346                         }
 347                 } else {
 348                         lbs_pr_err("deep sleep: already enabled\n");
 349                 }
 350         } else {
 351                 if (priv->is_deep_sleep) {
 352                         lbs_deb_cmd("deep sleep: wakeup\n");
 353                         BUG_ON(!priv->exit_deep_sleep);
 354                         ret = priv->exit_deep_sleep(priv);
 355                         if (!ret) {
 356                                 ret = lbs_wait_for_ds_awake(priv);
 357                                 if (ret)
 358                                         lbs_pr_err("deep sleep: wakeup"
 359                                                         "failed\n");
 360                         }
 361                 }
 362         }
 363
 364         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 365         return ret;
 366 }
 367
 368 /**
 369  *  @brief Set an SNMP MIB value
 370  *
 371  *  @param priv         A pointer to struct lbs_private structure
 372  *  @param oid          The OID to set in the firmware
 373  *  @param val          Value to set the OID to
 374  *
 375  *  @return             0 on success, error on failure
 376  */
 377 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 378 {
 379         struct cmd_ds_802_11_snmp_mib cmd;
 380         int ret;
 381
 382         lbs_deb_enter(LBS_DEB_CMD);
 383
 384         memset(&cmd, 0, sizeof (cmd));
 385         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 386         cmd.action = cpu_to_le16(CMD_ACT_SET);
 387         cmd.oid = cpu_to_le16((u16) oid);
 388
 389         switch (oid) {
 390         case SNMP_MIB_OID_BSS_TYPE:
 391                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 392                 cmd.value[0] = val;
 393                 break;
 394         case SNMP_MIB_OID_11D_ENABLE:
 395         case SNMP_MIB_OID_FRAG_THRESHOLD:
 396         case SNMP_MIB_OID_RTS_THRESHOLD:
 397         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 398         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 399                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 400                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 401                 break;
 402         default:
 403                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 404                 ret = -EINVAL;
 405                 goto out;
 406         }
 407
 408         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 409                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 410
 411         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 412
 413 out:
 414         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 415         return ret;
 416 }
 417
 418 /**
 419  *  @brief Get an SNMP MIB value
 420  *
 421  *  @param priv         A pointer to struct lbs_private structure
 422  *  @param oid          The OID to retrieve from the firmware
 423  *  @param out_val      Location for the returned value
 424  *
 425  *  @return             0 on success, error on failure
 426  */
 427 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 428 {
 429         struct cmd_ds_802_11_snmp_mib cmd;
 430         int ret;
 431
 432         lbs_deb_enter(LBS_DEB_CMD);
 433
 434         memset(&cmd, 0, sizeof (cmd));
 435         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 436         cmd.action = cpu_to_le16(CMD_ACT_GET);
 437         cmd.oid = cpu_to_le16(oid);
 438
 439         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 440         if (ret)
 441                 goto out;
 442
 443         switch (le16_to_cpu(cmd.bufsize)) {
 444         case sizeof(u8):
 445                 *out_val = cmd.value[0];
 446                 break;
 447         case sizeof(u16):
 448                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 449                 break;
 450         default:
 451                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 452                             oid, le16_to_cpu(cmd.bufsize));
 453                 break;
 454         }
 455
 456 out:
 457         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 458         return ret;
 459 }
 460
 461 /**
 462  *  @brief Get the min, max, and current TX power
 463  *
 464  *  @param priv         A pointer to struct lbs_private structure
 465  *  @param curlevel     Current power level in dBm
 466  *  @param minlevel     Minimum supported power level in dBm (optional)
 467  *  @param maxlevel     Maximum supported power level in dBm (optional)
 468  *
 469  *  @return             0 on success, error on failure
 470  */
 471 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 472                      s16 *maxlevel)
 473 {
 474         struct cmd_ds_802_11_rf_tx_power cmd;
 475         int ret;
 476
 477         lbs_deb_enter(LBS_DEB_CMD);
 478
 479         memset(&cmd, 0, sizeof(cmd));
 480         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 481         cmd.action = cpu_to_le16(CMD_ACT_GET);
 482
 483         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 484         if (ret == 0) {
 485                 *curlevel = le16_to_cpu(cmd.curlevel);
 486                 if (minlevel)
 487                         *minlevel = cmd.minlevel;
 488                 if (maxlevel)
 489                         *maxlevel = cmd.maxlevel;
 490         }
 491
 492         lbs_deb_leave(LBS_DEB_CMD);
 493         return ret;
 494 }
 495
 496 /**
 497  *  @brief Set the TX power
 498  *
 499  *  @param priv         A pointer to struct lbs_private structure
 500  *  @param dbm          The desired power level in dBm
 501  *
 502  *  @return             0 on success, error on failure
 503  */
 504 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 505 {
 506         struct cmd_ds_802_11_rf_tx_power cmd;
 507         int ret;
 508
 509         lbs_deb_enter(LBS_DEB_CMD);
 510
 511         memset(&cmd, 0, sizeof(cmd));
 512         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 513         cmd.action = cpu_to_le16(CMD_ACT_SET);
 514         cmd.curlevel = cpu_to_le16(dbm);
 515
 516         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 517
 518         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 519
 520         lbs_deb_leave(LBS_DEB_CMD);
 521         return ret;
 522 }
 523
 524 static int lbs_cmd_802_11_monitor_mode(struct cmd_ds_command *cmd,
 525                                       u16 cmd_action, void *pdata_buf)
 526 {
 527         struct cmd_ds_802_11_monitor_mode *monitor = &cmd->params.monitor;
 528
 529         cmd->command = cpu_to_le16(CMD_802_11_MONITOR_MODE);
 530         cmd->size =
 531             cpu_to_le16(sizeof(struct cmd_ds_802_11_monitor_mode) +
 532                              sizeof(struct cmd_header));
 533
 534         monitor->action = cpu_to_le16(cmd_action);
 535         if (cmd_action == CMD_ACT_SET) {
 536                 monitor->mode =
 537                     cpu_to_le16((u16) (*(u32 *) pdata_buf));
 538         }
 539
 540         return 0;
 541 }
 542
 543 /**
 544  *  @brief Get the radio channel
 545  *
 546  *  @param priv         A pointer to struct lbs_private structure
 547  *
 548  *  @return             The channel on success, error on failure
 549  */
 550 static int lbs_get_channel(struct lbs_private *priv)
 551 {
 552         struct cmd_ds_802_11_rf_channel cmd;
 553         int ret = 0;
 554
 555         lbs_deb_enter(LBS_DEB_CMD);
 556
 557         memset(&cmd, 0, sizeof(cmd));
 558         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 559         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 560
 561         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 562         if (ret)
 563                 goto out;
 564
 565         ret = le16_to_cpu(cmd.channel);
 566         lbs_deb_cmd("current radio channel is %d\n", ret);
 567
 568 out:
 569         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 570         return ret;
 571 }
 572
 573 int lbs_update_channel(struct lbs_private *priv)
 574 {
 575         int ret;
 576
 577         /* the channel in f/w could be out of sync; get the current channel */
 578         lbs_deb_enter(LBS_DEB_ASSOC);
 579
 580         ret = lbs_get_channel(priv);
 581         if (ret > 0) {
 582                 priv->channel = ret;
 583                 ret = 0;
 584         }
 585         lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
 586         return ret;
 587 }
 588
 589 /**
 590  *  @brief Set the radio channel
 591  *
 592  *  @param priv         A pointer to struct lbs_private structure
 593  *  @param channel      The desired channel, or 0 to clear a locked channel
 594  *
 595  *  @return             0 on success, error on failure
 596  */
 597 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 598 {
 599         struct cmd_ds_802_11_rf_channel cmd;
 600 #ifdef DEBUG
 601         u8 old_channel = priv->channel;
 602 #endif
 603         int ret = 0;
 604
 605         lbs_deb_enter(LBS_DEB_CMD);
 606
 607         memset(&cmd, 0, sizeof(cmd));
 608         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 609         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 610         cmd.channel = cpu_to_le16(channel);
 611
 612         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 613         if (ret)
 614                 goto out;
 615
 616         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 617         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 618                 priv->channel);
 619
 620 out:
 621         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 622         return ret;
 623 }
 624
 625 static int lbs_cmd_reg_access(struct cmd_ds_command *cmdptr,
 626                                u8 cmd_action, void *pdata_buf)
 627 {
 628         struct lbs_offset_value *offval;
 629
 630         lbs_deb_enter(LBS_DEB_CMD);
 631
 632         offval = (struct lbs_offset_value *)pdata_buf;
 633
 634         switch (le16_to_cpu(cmdptr->command)) {
 635         case CMD_MAC_REG_ACCESS:
 636                 {
 637                         struct cmd_ds_mac_reg_access *macreg;
 638
 639                         cmdptr->size =
 640                             cpu_to_le16(sizeof (struct cmd_ds_mac_reg_access)
 641                                         + sizeof(struct cmd_header));
 642                         macreg =
 643                             (struct cmd_ds_mac_reg_access *)&cmdptr->params.
 644                             macreg;
 645
 646                         macreg->action = cpu_to_le16(cmd_action);
 647                         macreg->offset = cpu_to_le16((u16) offval->offset);
 648                         macreg->value = cpu_to_le32(offval->value);
 649
 650                         break;
 651                 }
 652
 653         case CMD_BBP_REG_ACCESS:
 654                 {
 655                         struct cmd_ds_bbp_reg_access *bbpreg;
 656
 657                         cmdptr->size =
 658                             cpu_to_le16(sizeof
 659                                              (struct cmd_ds_bbp_reg_access)
 660                                              + sizeof(struct cmd_header));
 661                         bbpreg =
 662                             (struct cmd_ds_bbp_reg_access *)&cmdptr->params.
 663                             bbpreg;
 664
 665                         bbpreg->action = cpu_to_le16(cmd_action);
 666                         bbpreg->offset = cpu_to_le16((u16) offval->offset);
 667                         bbpreg->value = (u8) offval->value;
 668
 669                         break;
 670                 }
 671
 672         case CMD_RF_REG_ACCESS:
 673                 {
 674                         struct cmd_ds_rf_reg_access *rfreg;
 675
 676                         cmdptr->size =
 677                             cpu_to_le16(sizeof
 678                                              (struct cmd_ds_rf_reg_access) +
 679                                              sizeof(struct cmd_header));
 680                         rfreg =
 681                             (struct cmd_ds_rf_reg_access *)&cmdptr->params.
 682                             rfreg;
 683
 684                         rfreg->action = cpu_to_le16(cmd_action);
 685                         rfreg->offset = cpu_to_le16((u16) offval->offset);
 686                         rfreg->value = (u8) offval->value;
 687
 688                         break;
 689                 }
 690
 691         default:
 692                 break;
 693         }
 694
 695         lbs_deb_leave(LBS_DEB_CMD);
 696         return 0;
 697 }
 698
 699 static void lbs_queue_cmd(struct lbs_private *priv,
 700                           struct cmd_ctrl_node *cmdnode)
 701 {
 702         unsigned long flags;
 703         int addtail = 1;
 704
 705         lbs_deb_enter(LBS_DEB_HOST);
 706
 707         if (!cmdnode) {
 708                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 709                 goto done;
 710         }
 711         if (!cmdnode->cmdbuf->size) {
 712                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 713                 goto done;
 714         }
 715         cmdnode->result = 0;
 716
 717         /* Exit_PS command needs to be queued in the header always. */
 718         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 719                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf[1];
 720
 721                 if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
 722                         if (priv->psstate != PS_STATE_FULL_POWER)
 723                                 addtail = 0;
 724                 }
 725         }
 726
 727         spin_lock_irqsave(&priv->driver_lock, flags);
 728
 729         if (addtail)
 730                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 731         else
 732                 list_add(&cmdnode->list, &priv->cmdpendingq);
 733
 734         spin_unlock_irqrestore(&priv->driver_lock, flags);
 735
 736         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 737                      le16_to_cpu(cmdnode->cmdbuf->command));
 738
 739 done:
 740         lbs_deb_leave(LBS_DEB_HOST);
 741 }
 742
 743 static void lbs_submit_command(struct lbs_private *priv,
 744                                struct cmd_ctrl_node *cmdnode)
 745 {
 746         unsigned long flags;
 747         struct cmd_header *cmd;
 748         uint16_t cmdsize;
 749         uint16_t command;
 750         int timeo = 3 * HZ;
 751         int ret;
 752
 753         lbs_deb_enter(LBS_DEB_HOST);
 754
 755         cmd = cmdnode->cmdbuf;
 756
 757         spin_lock_irqsave(&priv->driver_lock, flags);
 758         priv->cur_cmd = cmdnode;
 759         priv->cur_cmd_retcode = 0;
 760         spin_unlock_irqrestore(&priv->driver_lock, flags);
 761
 762         cmdsize = le16_to_cpu(cmd->size);
 763         command = le16_to_cpu(cmd->command);
 764
 765         /* These commands take longer */
 766         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 767                 timeo = 5 * HZ;
 768
 769         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 770                      command, le16_to_cpu(cmd->seqnum), cmdsize);
 771         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 772
 773         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 774
 775         if (ret) {
 776                 lbs_pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
 777                 /* Let the timer kick in and retry, and potentially reset
 778                    the whole thing if the condition persists */
 779                 timeo = HZ/4;
 780         }
 781
 782         if (command == CMD_802_11_DEEP_SLEEP) {
 783                 if (priv->is_auto_deep_sleep_enabled) {
 784                         priv->wakeup_dev_required = 1;
 785                         priv->dnld_sent = 0;
 786                 }
 787                 priv->is_deep_sleep = 1;
 788                 lbs_complete_command(priv, cmdnode, 0);
 789         } else {
 790                 /* Setup the timer after transmit command */
 791                 mod_timer(&priv->command_timer, jiffies + timeo);
 792         }
 793
 794         lbs_deb_leave(LBS_DEB_HOST);
 795 }
 796
 797 /**
 798  *  This function inserts command node to cmdfreeq
 799  *  after cleans it. Requires priv->driver_lock held.
 800  */
 801 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 802                                          struct cmd_ctrl_node *cmdnode)
 803 {
 804         lbs_deb_enter(LBS_DEB_HOST);
 805
 806         if (!cmdnode)
 807                 goto out;
 808
 809         cmdnode->callback = NULL;
 810         cmdnode->callback_arg = 0;
 811
 812         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
 813
 814         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 815  out:
 816         lbs_deb_leave(LBS_DEB_HOST);
 817 }
 818
 819 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 820         struct cmd_ctrl_node *ptempcmd)
 821 {
 822         unsigned long flags;
 823
 824         spin_lock_irqsave(&priv->driver_lock, flags);
 825         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
 826         spin_unlock_irqrestore(&priv->driver_lock, flags);
 827 }
 828
 829 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
 830                           int result)
 831 {
 832         if (cmd == priv->cur_cmd)
 833                 priv->cur_cmd_retcode = result;
 834
 835         cmd->result = result;
 836         cmd->cmdwaitqwoken = 1;
 837         wake_up_interruptible(&cmd->cmdwait_q);
 838
 839         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
 840                 __lbs_cleanup_and_insert_cmd(priv, cmd);
 841         priv->cur_cmd = NULL;
 842 }
 843
 844 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
 845 {
 846         struct cmd_ds_802_11_radio_control cmd;
 847         int ret = -EINVAL;
 848
 849         lbs_deb_enter(LBS_DEB_CMD);
 850
 851         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 852         cmd.action = cpu_to_le16(CMD_ACT_SET);
 853
 854         /* Only v8 and below support setting the preamble */
 855         if (priv->fwrelease < 0x09000000) {
 856                 switch (preamble) {
 857                 case RADIO_PREAMBLE_SHORT:
 858                         if (!(priv->capability & WLAN_CAPABILITY_SHORT_PREAMBLE))
 859                                 goto out;
 860                         /* Fall through */
 861                 case RADIO_PREAMBLE_AUTO:
 862                 case RADIO_PREAMBLE_LONG:
 863                         cmd.control = cpu_to_le16(preamble);
 864                         break;
 865                 default:
 866                         goto out;
 867                 }
 868         }
 869
 870         if (radio_on)
 871                 cmd.control |= cpu_to_le16(0x1);
 872         else {
 873                 cmd.control &= cpu_to_le16(~0x1);
 874                 priv->txpower_cur = 0;
 875         }
 876
 877         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
 878                     radio_on ? "ON" : "OFF", preamble);
 879
 880         priv->radio_on = radio_on;
 881
 882         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
 883
 884 out:
 885         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 886         return ret;
 887 }
 888
 889 void lbs_set_mac_control(struct lbs_private *priv)
 890 {
 891         struct cmd_ds_mac_control cmd;
 892
 893         lbs_deb_enter(LBS_DEB_CMD);
 894
 895         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 896         cmd.action = cpu_to_le16(priv->mac_control);
 897         cmd.reserved = 0;
 898
 899         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
 900
 901         lbs_deb_leave(LBS_DEB_CMD);
 902 }
 903
 904 /**
 905  *  @brief This function prepare the command before send to firmware.
 906  *
 907  *  @param priv         A pointer to struct lbs_private structure
 908  *  @param cmd_no       command number
 909  *  @param cmd_action   command action: GET or SET
 910  *  @param wait_option  wait option: wait response or not
 911  *  @param cmd_oid      cmd oid: treated as sub command
 912  *  @param pdata_buf    A pointer to informaion buffer
 913  *  @return             0 or -1
 914  */
 915 int lbs_prepare_and_send_command(struct lbs_private *priv,
 916                           u16 cmd_no,
 917                           u16 cmd_action,
 918                           u16 wait_option, u32 cmd_oid, void *pdata_buf)
 919 {
 920         int ret = 0;
 921         struct cmd_ctrl_node *cmdnode;
 922         struct cmd_ds_command *cmdptr;
 923         unsigned long flags;
 924
 925         lbs_deb_enter(LBS_DEB_HOST);
 926
 927         if (!priv) {
 928                 lbs_deb_host("PREP_CMD: priv is NULL\n");
 929                 ret = -1;
 930                 goto done;
 931         }
 932
 933         if (priv->surpriseremoved) {
 934                 lbs_deb_host("PREP_CMD: card removed\n");
 935                 ret = -1;
 936                 goto done;
 937         }
 938
 939         if (!lbs_is_cmd_allowed(priv)) {
 940                 ret = -EBUSY;
 941                 goto done;
 942         }
 943
 944         cmdnode = lbs_get_cmd_ctrl_node(priv);
 945
 946         if (cmdnode == NULL) {
 947                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
 948
 949                 /* Wake up main thread to execute next command */
 950                 wake_up_interruptible(&priv->waitq);
 951                 ret = -1;
 952                 goto done;
 953         }
 954
 955         cmdnode->callback = NULL;
 956         cmdnode->callback_arg = (unsigned long)pdata_buf;
 957
 958         cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
 959
 960         lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
 961
 962         /* Set sequence number, command and INT option */
 963         priv->seqnum++;
 964         cmdptr->seqnum = cpu_to_le16(priv->seqnum);
 965
 966         cmdptr->command = cpu_to_le16(cmd_no);
 967         cmdptr->result = 0;
 968
 969         switch (cmd_no) {
 970         case CMD_802_11_PS_MODE:
 971                 ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
 972                 break;
 973
 974         case CMD_MAC_REG_ACCESS:
 975         case CMD_BBP_REG_ACCESS:
 976         case CMD_RF_REG_ACCESS:
 977                 ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
 978                 break;
 979
 980         case CMD_802_11_MONITOR_MODE:
 981                 ret = lbs_cmd_802_11_monitor_mode(cmdptr,
 982                                           cmd_action, pdata_buf);
 983                 break;
 984
 985         case CMD_802_11_RSSI:
 986                 ret = lbs_cmd_802_11_rssi(priv, cmdptr);
 987                 break;
 988
 989         case CMD_802_11_SET_AFC:
 990         case CMD_802_11_GET_AFC:
 991
 992                 cmdptr->command = cpu_to_le16(cmd_no);
 993                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
 994                                            sizeof(struct cmd_header));
 995
 996                 memmove(&cmdptr->params.afc,
 997                         pdata_buf, sizeof(struct cmd_ds_802_11_afc));
 998
 999                 ret = 0;
1000                 goto done;
1001
1002         case CMD_802_11_TPC_CFG:
1003                 cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
1004                 cmdptr->size =
1005                     cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
1006                                      sizeof(struct cmd_header));
1007
1008                 memmove(&cmdptr->params.tpccfg,
1009                         pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
1010
1011                 ret = 0;
1012                 break;
1013
1014         case CMD_BT_ACCESS:
1015                 ret = lbs_cmd_bt_access(cmdptr, cmd_action, pdata_buf);
1016                 break;
1017
1018         case CMD_FWT_ACCESS:
1019                 ret = lbs_cmd_fwt_access(cmdptr, cmd_action, pdata_buf);
1020                 break;
1021
1022         case CMD_802_11_BEACON_CTRL:
1023                 ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
1024                 break;
1025         case CMD_802_11_DEEP_SLEEP:
1026                 cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
1027                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
1028                 break;
1029         default:
1030                 lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
1031                 ret = -1;
1032                 break;
1033         }
1034
1035         /* return error, since the command preparation failed */
1036         if (ret != 0) {
1037                 lbs_deb_host("PREP_CMD: command preparation failed\n");
1038                 lbs_cleanup_and_insert_cmd(priv, cmdnode);
1039                 ret = -1;
1040                 goto done;
1041         }
1042
1043         cmdnode->cmdwaitqwoken = 0;
1044
1045         lbs_queue_cmd(priv, cmdnode);
1046         wake_up_interruptible(&priv->waitq);
1047
1048         if (wait_option & CMD_OPTION_WAITFORRSP) {
1049                 lbs_deb_host("PREP_CMD: wait for response\n");
1050                 might_sleep();
1051                 wait_event_interruptible(cmdnode->cmdwait_q,
1052                                          cmdnode->cmdwaitqwoken);
1053         }
1054
1055         spin_lock_irqsave(&priv->driver_lock, flags);
1056         if (priv->cur_cmd_retcode) {
1057                 lbs_deb_host("PREP_CMD: command failed with return code %d\n",
1058                        priv->cur_cmd_retcode);
1059                 priv->cur_cmd_retcode = 0;
1060                 ret = -1;
1061         }
1062         spin_unlock_irqrestore(&priv->driver_lock, flags);
1063
1064 done:
1065         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1066         return ret;
1067 }
1068
1069 /**
1070  *  @brief This function allocates the command buffer and link
1071  *  it to command free queue.
1072  *
1073  *  @param priv         A pointer to struct lbs_private structure
1074  *  @return             0 or -1
1075  */
1076 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1077 {
1078         int ret = 0;
1079         u32 bufsize;
1080         u32 i;
1081         struct cmd_ctrl_node *cmdarray;
1082
1083         lbs_deb_enter(LBS_DEB_HOST);
1084
1085         /* Allocate and initialize the command array */
1086         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1087         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1088                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1089                 ret = -1;
1090                 goto done;
1091         }
1092         priv->cmd_array = cmdarray;
1093
1094         /* Allocate and initialize each command buffer in the command array */
1095         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1096                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1097                 if (!cmdarray[i].cmdbuf) {
1098                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1099                         ret = -1;
1100                         goto done;
1101                 }
1102         }
1103
1104         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1105                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1106                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1107         }
1108         ret = 0;
1109
1110 done:
1111         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1112         return ret;
1113 }
1114
1115 /**
1116  *  @brief This function frees the command buffer.
1117  *
1118  *  @param priv         A pointer to struct lbs_private structure
1119  *  @return             0 or -1
1120  */
1121 int lbs_free_cmd_buffer(struct lbs_private *priv)
1122 {
1123         struct cmd_ctrl_node *cmdarray;
1124         unsigned int i;
1125
1126         lbs_deb_enter(LBS_DEB_HOST);
1127
1128         /* need to check if cmd array is allocated or not */
1129         if (priv->cmd_array == NULL) {
1130                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1131                 goto done;
1132         }
1133
1134         cmdarray = priv->cmd_array;
1135
1136         /* Release shared memory buffers */
1137         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1138                 if (cmdarray[i].cmdbuf) {
1139                         kfree(cmdarray[i].cmdbuf);
1140                         cmdarray[i].cmdbuf = NULL;
1141                 }
1142         }
1143
1144         /* Release cmd_ctrl_node */
1145         if (priv->cmd_array) {
1146                 kfree(priv->cmd_array);
1147                 priv->cmd_array = NULL;
1148         }
1149
1150 done:
1151         lbs_deb_leave(LBS_DEB_HOST);
1152         return 0;
1153 }
1154
1155 /**
1156  *  @brief This function gets a free command node if available in
1157  *  command free queue.
1158  *
1159  *  @param priv         A pointer to struct lbs_private structure
1160  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1161  */
1162 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv)
1163 {
1164         struct cmd_ctrl_node *tempnode;
1165         unsigned long flags;
1166
1167         lbs_deb_enter(LBS_DEB_HOST);
1168
1169         if (!priv)
1170                 return NULL;
1171
1172         spin_lock_irqsave(&priv->driver_lock, flags);
1173
1174         if (!list_empty(&priv->cmdfreeq)) {
1175                 tempnode = list_first_entry(&priv->cmdfreeq,
1176                                             struct cmd_ctrl_node, list);
1177                 list_del(&tempnode->list);
1178         } else {
1179                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1180                 tempnode = NULL;
1181         }
1182
1183         spin_unlock_irqrestore(&priv->driver_lock, flags);
1184
1185         lbs_deb_leave(LBS_DEB_HOST);
1186         return tempnode;
1187 }
1188
1189 /**
1190  *  @brief This function executes next command in command
1191  *  pending queue. It will put firmware back to PS mode
1192  *  if applicable.
1193  *
1194  *  @param priv     A pointer to struct lbs_private structure
1195  *  @return        0 or -1
1196  */
1197 int lbs_execute_next_command(struct lbs_private *priv)
1198 {
1199         struct cmd_ctrl_node *cmdnode = NULL;
1200         struct cmd_header *cmd;
1201         unsigned long flags;
1202         int ret = 0;
1203
1204         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1205          * only caller to us is lbs_thread() and we get even when a
1206          * data packet is received */
1207         lbs_deb_enter(LBS_DEB_THREAD);
1208
1209         spin_lock_irqsave(&priv->driver_lock, flags);
1210
1211         if (priv->cur_cmd) {
1212                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1213                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1214                 ret = -1;
1215                 goto done;
1216         }
1217
1218         if (!list_empty(&priv->cmdpendingq)) {
1219                 cmdnode = list_first_entry(&priv->cmdpendingq,
1220                                            struct cmd_ctrl_node, list);
1221         }
1222
1223         spin_unlock_irqrestore(&priv->driver_lock, flags);
1224
1225         if (cmdnode) {
1226                 cmd = cmdnode->cmdbuf;
1227
1228                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1229                         if ((priv->psstate == PS_STATE_SLEEP) ||
1230                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1231                                 lbs_deb_host(
1232                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1233                                        le16_to_cpu(cmd->command),
1234                                        priv->psstate);
1235                                 ret = -1;
1236                                 goto done;
1237                         }
1238                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1239                                      "0x%04x in psstate %d\n",
1240                                      le16_to_cpu(cmd->command), priv->psstate);
1241                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1242                         /*
1243                          * 1. Non-PS command:
1244                          * Queue it. set needtowakeup to TRUE if current state
1245                          * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
1246                          * 2. PS command but not Exit_PS:
1247                          * Ignore it.
1248                          * 3. PS command Exit_PS:
1249                          * Set needtowakeup to TRUE if current state is SLEEP,
1250                          * otherwise send this command down to firmware
1251                          * immediately.
1252                          */
1253                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1254                                 /*  Prepare to send Exit PS,
1255                                  *  this non PS command will be sent later */
1256                                 if ((priv->psstate == PS_STATE_SLEEP)
1257                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1258                                     ) {
1259                                         /* w/ new scheme, it will not reach here.
1260                                            since it is blocked in main_thread. */
1261                                         priv->needtowakeup = 1;
1262                                 } else
1263                                         lbs_ps_wakeup(priv, 0);
1264
1265                                 ret = 0;
1266                                 goto done;
1267                         } else {
1268                                 /*
1269                                  * PS command. Ignore it if it is not Exit_PS.
1270                                  * otherwise send it down immediately.
1271                                  */
1272                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1273
1274                                 lbs_deb_host(
1275                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1276                                        psm->action);
1277                                 if (psm->action !=
1278                                     cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
1279                                         lbs_deb_host(
1280                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\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
1286                                         ret = 0;
1287                                         goto done;
1288                                 }
1289
1290                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1291                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1292                                         lbs_deb_host(
1293                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1294                                         list_del(&cmdnode->list);
1295                                         spin_lock_irqsave(&priv->driver_lock, flags);
1296                                         lbs_complete_command(priv, cmdnode, 0);
1297                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1298                                         priv->needtowakeup = 1;
1299
1300                                         ret = 0;
1301                                         goto done;
1302                                 }
1303
1304                                 lbs_deb_host(
1305                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1306                         }
1307                 }
1308                 list_del(&cmdnode->list);
1309                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1310                             le16_to_cpu(cmd->command));
1311                 lbs_submit_command(priv, cmdnode);
1312         } else {
1313                 /*
1314                  * check if in power save mode, if yes, put the device back
1315                  * to PS mode
1316                  */
1317                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1318                     (priv->psstate == PS_STATE_FULL_POWER) &&
1319                     ((priv->connect_status == LBS_CONNECTED) ||
1320                     (priv->mesh_connect_status == LBS_CONNECTED))) {
1321                         if (priv->secinfo.WPAenabled ||
1322                             priv->secinfo.WPA2enabled) {
1323                                 /* check for valid WPA group keys */
1324                                 if (priv->wpa_mcast_key.len ||
1325                                     priv->wpa_unicast_key.len) {
1326                                         lbs_deb_host(
1327                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1328                                                " go back to PS_SLEEP");
1329                                         lbs_ps_sleep(priv, 0);
1330                                 }
1331                         } else {
1332                                 lbs_deb_host(
1333                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1334                                        "go back to PS_SLEEP");
1335                                 lbs_ps_sleep(priv, 0);
1336                         }
1337                 }
1338         }
1339
1340         ret = 0;
1341 done:
1342         lbs_deb_leave(LBS_DEB_THREAD);
1343         return ret;
1344 }
1345
1346 static void lbs_send_confirmsleep(struct lbs_private *priv)
1347 {
1348         unsigned long flags;
1349         int ret;
1350
1351         lbs_deb_enter(LBS_DEB_HOST);
1352         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1353                 sizeof(confirm_sleep));
1354
1355         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1356                 sizeof(confirm_sleep));
1357         if (ret) {
1358                 lbs_pr_alert("confirm_sleep failed\n");
1359                 goto out;
1360         }
1361
1362         spin_lock_irqsave(&priv->driver_lock, flags);
1363
1364         /* We don't get a response on the sleep-confirmation */
1365         priv->dnld_sent = DNLD_RES_RECEIVED;
1366
1367         /* If nothing to do, go back to sleep (?) */
1368         if (!__kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1369                 priv->psstate = PS_STATE_SLEEP;
1370
1371         spin_unlock_irqrestore(&priv->driver_lock, flags);
1372
1373 out:
1374         lbs_deb_leave(LBS_DEB_HOST);
1375 }
1376
1377 void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
1378 {
1379         lbs_deb_enter(LBS_DEB_HOST);
1380
1381         /*
1382          * PS is currently supported only in Infrastructure mode
1383          * Remove this check if it is to be supported in IBSS mode also
1384          */
1385
1386         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1387                               CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
1388
1389         lbs_deb_leave(LBS_DEB_HOST);
1390 }
1391
1392 /**
1393  *  @brief This function sends Exit_PS command to firmware.
1394  *
1395  *  @param priv         A pointer to struct lbs_private structure
1396  *  @param wait_option  wait response or not
1397  *  @return             n/a
1398  */
1399 void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
1400 {
1401         __le32 Localpsmode;
1402
1403         lbs_deb_enter(LBS_DEB_HOST);
1404
1405         Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
1406
1407         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1408                               CMD_SUBCMD_EXIT_PS,
1409                               wait_option, 0, &Localpsmode);
1410
1411         lbs_deb_leave(LBS_DEB_HOST);
1412 }
1413
1414 /**
1415  *  @brief This function checks condition and prepares to
1416  *  send sleep confirm command to firmware if ok.
1417  *
1418  *  @param priv         A pointer to struct lbs_private structure
1419  *  @param psmode       Power Saving mode
1420  *  @return             n/a
1421  */
1422 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1423 {
1424         unsigned long flags =0;
1425         int allowed = 1;
1426
1427         lbs_deb_enter(LBS_DEB_HOST);
1428
1429         spin_lock_irqsave(&priv->driver_lock, flags);
1430         if (priv->dnld_sent) {
1431                 allowed = 0;
1432                 lbs_deb_host("dnld_sent was set\n");
1433         }
1434
1435         /* In-progress command? */
1436         if (priv->cur_cmd) {
1437                 allowed = 0;
1438                 lbs_deb_host("cur_cmd was set\n");
1439         }
1440
1441         /* Pending events or command responses? */
1442         if (__kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1443                 allowed = 0;
1444                 lbs_deb_host("pending events or command responses\n");
1445         }
1446         spin_unlock_irqrestore(&priv->driver_lock, flags);
1447
1448         if (allowed) {
1449                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1450                 lbs_send_confirmsleep(priv);
1451         } else {
1452                 lbs_deb_host("sleep confirm has been delayed\n");
1453         }
1454
1455         lbs_deb_leave(LBS_DEB_HOST);
1456 }
1457
1458
1459 /**
1460  * @brief Configures the transmission power control functionality.
1461  *
1462  * @param priv          A pointer to struct lbs_private structure
1463  * @param enable        Transmission power control enable
1464  * @param p0            Power level when link quality is good (dBm).
1465  * @param p1            Power level when link quality is fair (dBm).
1466  * @param p2            Power level when link quality is poor (dBm).
1467  * @param usesnr        Use Signal to Noise Ratio in TPC
1468  *
1469  * @return 0 on success
1470  */
1471 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1472                 int8_t p2, int usesnr)
1473 {
1474         struct cmd_ds_802_11_tpc_cfg cmd;
1475         int ret;
1476
1477         memset(&cmd, 0, sizeof(cmd));
1478         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1479         cmd.action = cpu_to_le16(CMD_ACT_SET);
1480         cmd.enable = !!enable;
1481         cmd.usesnr = !!usesnr;
1482         cmd.P0 = p0;
1483         cmd.P1 = p1;
1484         cmd.P2 = p2;
1485
1486         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1487
1488         return ret;
1489 }
1490
1491 /**
1492  * @brief Configures the power adaptation settings.
1493  *
1494  * @param priv          A pointer to struct lbs_private structure
1495  * @param enable        Power adaptation enable
1496  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1497  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1498  * @param p2            Power level for 48 and 54 Mbps (dBm).
1499  *
1500  * @return 0 on Success
1501  */
1502
1503 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1504                 int8_t p1, int8_t p2)
1505 {
1506         struct cmd_ds_802_11_pa_cfg cmd;
1507         int ret;
1508
1509         memset(&cmd, 0, sizeof(cmd));
1510         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1511         cmd.action = cpu_to_le16(CMD_ACT_SET);
1512         cmd.enable = !!enable;
1513         cmd.P0 = p0;
1514         cmd.P1 = p1;
1515         cmd.P2 = p2;
1516
1517         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1518
1519         return ret;
1520 }
1521
1522
1523 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1524         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1525         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1526         unsigned long callback_arg)
1527 {
1528         struct cmd_ctrl_node *cmdnode;
1529
1530         lbs_deb_enter(LBS_DEB_HOST);
1531
1532         if (priv->surpriseremoved) {
1533                 lbs_deb_host("PREP_CMD: card removed\n");
1534                 cmdnode = ERR_PTR(-ENOENT);
1535                 goto done;
1536         }
1537
1538         if (!lbs_is_cmd_allowed(priv)) {
1539                 cmdnode = ERR_PTR(-EBUSY);
1540                 goto done;
1541         }
1542
1543         cmdnode = lbs_get_cmd_ctrl_node(priv);
1544         if (cmdnode == NULL) {
1545                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1546
1547                 /* Wake up main thread to execute next command */
1548                 wake_up_interruptible(&priv->waitq);
1549                 cmdnode = ERR_PTR(-ENOBUFS);
1550                 goto done;
1551         }
1552
1553         cmdnode->callback = callback;
1554         cmdnode->callback_arg = callback_arg;
1555
1556         /* Copy the incoming command to the buffer */
1557         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1558
1559         /* Set sequence number, clean result, move to buffer */
1560         priv->seqnum++;
1561         cmdnode->cmdbuf->command = cpu_to_le16(command);
1562         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1563         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1564         cmdnode->cmdbuf->result  = 0;
1565
1566         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1567
1568         cmdnode->cmdwaitqwoken = 0;
1569         lbs_queue_cmd(priv, cmdnode);
1570         wake_up_interruptible(&priv->waitq);
1571
1572  done:
1573         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1574         return cmdnode;
1575 }
1576
1577 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1578         struct cmd_header *in_cmd, int in_cmd_size)
1579 {
1580         lbs_deb_enter(LBS_DEB_CMD);
1581         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1582                 lbs_cmd_async_callback, 0);
1583         lbs_deb_leave(LBS_DEB_CMD);
1584 }
1585
1586 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1587               struct cmd_header *in_cmd, int in_cmd_size,
1588               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1589               unsigned long callback_arg)
1590 {
1591         struct cmd_ctrl_node *cmdnode;
1592         unsigned long flags;
1593         int ret = 0;
1594
1595         lbs_deb_enter(LBS_DEB_HOST);
1596
1597         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1598                                   callback, callback_arg);
1599         if (IS_ERR(cmdnode)) {
1600                 ret = PTR_ERR(cmdnode);
1601                 goto done;
1602         }
1603
1604         might_sleep();
1605         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1606
1607         spin_lock_irqsave(&priv->driver_lock, flags);
1608         ret = cmdnode->result;
1609         if (ret)
1610                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1611                             command, ret);
1612
1613         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1614         spin_unlock_irqrestore(&priv->driver_lock, flags);
1615
1616 done:
1617         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1618         return ret;
1619 }
1620 EXPORT_SYMBOL_GPL(__lbs_cmd);