Pileus Git - ~andy/linux/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 #include <linux/slab.h>
   9
  10 #include "decl.h"
  11 #include "cfg.h"
  12 #include "cmd.h"
  13
  14
  15 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv);
  16
  17 /**
  18  *  @brief Simple callback that copies response back into command
  19  *
  20  *  @param priv         A pointer to struct lbs_private structure
  21  *  @param extra        A pointer to the original command structure for which
  22  *                      'resp' is a response
  23  *  @param resp         A pointer to the command response
  24  *
  25  *  @return             0 on success, error on failure
  26  */
  27 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  28                      struct cmd_header *resp)
  29 {
  30         struct cmd_header *buf = (void *)extra;
  31         uint16_t copy_len;
  32
  33         copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  34         memcpy(buf, resp, copy_len);
  35         return 0;
  36 }
  37 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  38
  39 /**
  40  *  @brief Simple callback that ignores the result. Use this if
  41  *  you just want to send a command to the hardware, but don't
  42  *  care for the result.
  43  *
  44  *  @param priv         ignored
  45  *  @param extra        ignored
  46  *  @param resp         ignored
  47  *
  48  *  @return             0 for success
  49  */
  50 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  51                      struct cmd_header *resp)
  52 {
  53         return 0;
  54 }
  55
  56
  57 /**
  58  *  @brief Checks whether a command is allowed in Power Save mode
  59  *
  60  *  @param command the command ID
  61  *  @return        1 if allowed, 0 if not allowed
  62  */
  63 static u8 is_command_allowed_in_ps(u16 cmd)
  64 {
  65         switch (cmd) {
  66         case CMD_802_11_RSSI:
  67                 return 1;
  68         case CMD_802_11_HOST_SLEEP_CFG:
  69                 return 1;
  70         default:
  71                 break;
  72         }
  73         return 0;
  74 }
  75
  76 /**
  77  *  @brief This function checks if the command is allowed.
  78  *
  79  *  @param priv         A pointer to lbs_private structure
  80  *  @return             allowed or not allowed.
  81  */
  82
  83 static int lbs_is_cmd_allowed(struct lbs_private *priv)
  84 {
  85         int ret = 1;
  86
  87         lbs_deb_enter(LBS_DEB_CMD);
  88
  89         if (!priv->is_auto_deep_sleep_enabled) {
  90                 if (priv->is_deep_sleep) {
  91                         lbs_deb_cmd("command not allowed in deep sleep\n");
  92                         ret = 0;
  93                 }
  94         }
  95
  96         lbs_deb_leave(LBS_DEB_CMD);
  97         return ret;
  98 }
  99
 100 /**
 101  *  @brief Updates the hardware details like MAC address and regulatory region
 102  *
 103  *  @param priv         A pointer to struct lbs_private structure
 104  *
 105  *  @return             0 on success, error on failure
 106  */
 107 int lbs_update_hw_spec(struct lbs_private *priv)
 108 {
 109         struct cmd_ds_get_hw_spec cmd;
 110         int ret = -1;
 111         u32 i;
 112
 113         lbs_deb_enter(LBS_DEB_CMD);
 114
 115         memset(&cmd, 0, sizeof(cmd));
 116         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 117         memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
 118         ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
 119         if (ret)
 120                 goto out;
 121
 122         priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 123
 124         /* The firmware release is in an interesting format: the patch
 125          * level is in the most significant nibble ... so fix that: */
 126         priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 127         priv->fwrelease = (priv->fwrelease << 8) |
 128                 (priv->fwrelease >> 24 & 0xff);
 129
 130         /* Some firmware capabilities:
 131          * CF card    firmware 5.0.16p0:   cap 0x00000303
 132          * USB dongle firmware 5.110.17p2: cap 0x00000303
 133          */
 134         lbs_pr_info("%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 135                 cmd.permanentaddr,
 136                 priv->fwrelease >> 24 & 0xff,
 137                 priv->fwrelease >> 16 & 0xff,
 138                 priv->fwrelease >>  8 & 0xff,
 139                 priv->fwrelease       & 0xff,
 140                 priv->fwcapinfo);
 141         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 142                     cmd.hwifversion, cmd.version);
 143
 144         /* Clamp region code to 8-bit since FW spec indicates that it should
 145          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 146          * returns non-zero high 8 bits here.
 147          *
 148          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 149          * need to check for this problem and handle it properly.
 150          */
 151         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 152                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 153         else
 154                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 155
 156         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 157                 /* use the region code to search for the index */
 158                 if (priv->regioncode == lbs_region_code_to_index[i])
 159                         break;
 160         }
 161
 162         /* if it's unidentified region code, use the default (USA) */
 163         if (i >= MRVDRV_MAX_REGION_CODE) {
 164                 priv->regioncode = 0x10;
 165                 lbs_pr_info("unidentified region code; using the default (USA)\n");
 166         }
 167
 168         if (priv->current_addr[0] == 0xff)
 169                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 170
 171         memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 172         if (priv->mesh_dev)
 173                 memcpy(priv->mesh_dev->dev_addr, priv->current_addr, ETH_ALEN);
 174
 175 out:
 176         lbs_deb_leave(LBS_DEB_CMD);
 177         return ret;
 178 }
 179
 180 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
 181                         struct cmd_header *resp)
 182 {
 183         lbs_deb_enter(LBS_DEB_CMD);
 184         if (priv->wol_criteria == EHS_REMOVE_WAKEUP) {
 185                 priv->is_host_sleep_configured = 0;
 186                 if (priv->psstate == PS_STATE_FULL_POWER) {
 187                         priv->is_host_sleep_activated = 0;
 188                         wake_up_interruptible(&priv->host_sleep_q);
 189                 }
 190         } else {
 191                 priv->is_host_sleep_configured = 1;
 192         }
 193         lbs_deb_leave(LBS_DEB_CMD);
 194         return 0;
 195 }
 196
 197 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 198                 struct wol_config *p_wol_config)
 199 {
 200         struct cmd_ds_host_sleep cmd_config;
 201         int ret;
 202
 203         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 204         cmd_config.criteria = cpu_to_le32(criteria);
 205         cmd_config.gpio = priv->wol_gpio;
 206         cmd_config.gap = priv->wol_gap;
 207
 208         if (p_wol_config != NULL)
 209                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 210                                 sizeof(struct wol_config));
 211         else
 212                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 213
 214         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
 215                         le16_to_cpu(cmd_config.hdr.size),
 216                         lbs_ret_host_sleep_cfg, 0);
 217         if (!ret) {
 218                 if (p_wol_config)
 219                         memcpy((uint8_t *) p_wol_config,
 220                                         (uint8_t *)&cmd_config.wol_conf,
 221                                         sizeof(struct wol_config));
 222         } else {
 223                 lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
 224         }
 225
 226         return ret;
 227 }
 228 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 229
 230 static int lbs_cmd_802_11_ps_mode(struct cmd_ds_command *cmd,
 231                                    u16 cmd_action)
 232 {
 233         struct cmd_ds_802_11_ps_mode *psm = &cmd->params.psmode;
 234
 235         lbs_deb_enter(LBS_DEB_CMD);
 236
 237         cmd->command = cpu_to_le16(CMD_802_11_PS_MODE);
 238         cmd->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_ps_mode) +
 239                                 sizeof(struct cmd_header));
 240         psm->action = cpu_to_le16(cmd_action);
 241         psm->multipledtim = 0;
 242         switch (cmd_action) {
 243         case CMD_SUBCMD_ENTER_PS:
 244                 lbs_deb_cmd("PS command:" "SubCode- Enter PS\n");
 245
 246                 psm->locallisteninterval = 0;
 247                 psm->nullpktinterval = 0;
 248                 psm->multipledtim =
 249                     cpu_to_le16(MRVDRV_DEFAULT_MULTIPLE_DTIM);
 250                 break;
 251
 252         case CMD_SUBCMD_EXIT_PS:
 253                 lbs_deb_cmd("PS command:" "SubCode- Exit PS\n");
 254                 break;
 255
 256         case CMD_SUBCMD_SLEEP_CONFIRMED:
 257                 lbs_deb_cmd("PS command: SubCode- sleep confirm\n");
 258                 break;
 259
 260         default:
 261                 break;
 262         }
 263
 264         lbs_deb_leave(LBS_DEB_CMD);
 265         return 0;
 266 }
 267
 268 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 269                                 struct sleep_params *sp)
 270 {
 271         struct cmd_ds_802_11_sleep_params cmd;
 272         int ret;
 273
 274         lbs_deb_enter(LBS_DEB_CMD);
 275
 276         if (cmd_action == CMD_ACT_GET) {
 277                 memset(&cmd, 0, sizeof(cmd));
 278         } else {
 279                 cmd.error = cpu_to_le16(sp->sp_error);
 280                 cmd.offset = cpu_to_le16(sp->sp_offset);
 281                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 282                 cmd.calcontrol = sp->sp_calcontrol;
 283                 cmd.externalsleepclk = sp->sp_extsleepclk;
 284                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 285         }
 286         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 287         cmd.action = cpu_to_le16(cmd_action);
 288
 289         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 290
 291         if (!ret) {
 292                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 293                             "calcontrol 0x%x extsleepclk 0x%x\n",
 294                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 295                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 296                             cmd.externalsleepclk);
 297
 298                 sp->sp_error = le16_to_cpu(cmd.error);
 299                 sp->sp_offset = le16_to_cpu(cmd.offset);
 300                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 301                 sp->sp_calcontrol = cmd.calcontrol;
 302                 sp->sp_extsleepclk = cmd.externalsleepclk;
 303                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 304         }
 305
 306         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 307         return 0;
 308 }
 309
 310 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 311 {
 312         int ret = 0;
 313
 314         lbs_deb_enter(LBS_DEB_CMD);
 315
 316         if (priv->is_deep_sleep) {
 317                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 318                                         !priv->is_deep_sleep, (10 * HZ))) {
 319                         lbs_pr_err("ds_awake_q: timer expired\n");
 320                         ret = -1;
 321                 }
 322         }
 323
 324         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 325         return ret;
 326 }
 327
 328 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 329 {
 330         int ret =  0;
 331
 332         lbs_deb_enter(LBS_DEB_CMD);
 333
 334         if (deep_sleep) {
 335                 if (priv->is_deep_sleep != 1) {
 336                         lbs_deb_cmd("deep sleep: sleep\n");
 337                         BUG_ON(!priv->enter_deep_sleep);
 338                         ret = priv->enter_deep_sleep(priv);
 339                         if (!ret) {
 340                                 netif_stop_queue(priv->dev);
 341                                 netif_carrier_off(priv->dev);
 342                         }
 343                 } else {
 344                         lbs_pr_err("deep sleep: already enabled\n");
 345                 }
 346         } else {
 347                 if (priv->is_deep_sleep) {
 348                         lbs_deb_cmd("deep sleep: wakeup\n");
 349                         BUG_ON(!priv->exit_deep_sleep);
 350                         ret = priv->exit_deep_sleep(priv);
 351                         if (!ret) {
 352                                 ret = lbs_wait_for_ds_awake(priv);
 353                                 if (ret)
 354                                         lbs_pr_err("deep sleep: wakeup"
 355                                                         "failed\n");
 356                         }
 357                 }
 358         }
 359
 360         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 361         return ret;
 362 }
 363
 364 /**
 365  *  @brief Set an SNMP MIB value
 366  *
 367  *  @param priv         A pointer to struct lbs_private structure
 368  *  @param oid          The OID to set in the firmware
 369  *  @param val          Value to set the OID to
 370  *
 371  *  @return             0 on success, error on failure
 372  */
 373 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 374 {
 375         struct cmd_ds_802_11_snmp_mib cmd;
 376         int ret;
 377
 378         lbs_deb_enter(LBS_DEB_CMD);
 379
 380         memset(&cmd, 0, sizeof (cmd));
 381         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 382         cmd.action = cpu_to_le16(CMD_ACT_SET);
 383         cmd.oid = cpu_to_le16((u16) oid);
 384
 385         switch (oid) {
 386         case SNMP_MIB_OID_BSS_TYPE:
 387                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 388                 cmd.value[0] = val;
 389                 break;
 390         case SNMP_MIB_OID_11D_ENABLE:
 391         case SNMP_MIB_OID_FRAG_THRESHOLD:
 392         case SNMP_MIB_OID_RTS_THRESHOLD:
 393         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 394         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 395                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 396                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 397                 break;
 398         default:
 399                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 400                 ret = -EINVAL;
 401                 goto out;
 402         }
 403
 404         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 405                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 406
 407         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 408
 409 out:
 410         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 411         return ret;
 412 }
 413
 414 /**
 415  *  @brief Get an SNMP MIB value
 416  *
 417  *  @param priv         A pointer to struct lbs_private structure
 418  *  @param oid          The OID to retrieve from the firmware
 419  *  @param out_val      Location for the returned value
 420  *
 421  *  @return             0 on success, error on failure
 422  */
 423 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 424 {
 425         struct cmd_ds_802_11_snmp_mib cmd;
 426         int ret;
 427
 428         lbs_deb_enter(LBS_DEB_CMD);
 429
 430         memset(&cmd, 0, sizeof (cmd));
 431         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 432         cmd.action = cpu_to_le16(CMD_ACT_GET);
 433         cmd.oid = cpu_to_le16(oid);
 434
 435         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 436         if (ret)
 437                 goto out;
 438
 439         switch (le16_to_cpu(cmd.bufsize)) {
 440         case sizeof(u8):
 441                 *out_val = cmd.value[0];
 442                 break;
 443         case sizeof(u16):
 444                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 445                 break;
 446         default:
 447                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 448                             oid, le16_to_cpu(cmd.bufsize));
 449                 break;
 450         }
 451
 452 out:
 453         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 454         return ret;
 455 }
 456
 457 /**
 458  *  @brief Get the min, max, and current TX power
 459  *
 460  *  @param priv         A pointer to struct lbs_private structure
 461  *  @param curlevel     Current power level in dBm
 462  *  @param minlevel     Minimum supported power level in dBm (optional)
 463  *  @param maxlevel     Maximum supported power level in dBm (optional)
 464  *
 465  *  @return             0 on success, error on failure
 466  */
 467 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 468                      s16 *maxlevel)
 469 {
 470         struct cmd_ds_802_11_rf_tx_power cmd;
 471         int ret;
 472
 473         lbs_deb_enter(LBS_DEB_CMD);
 474
 475         memset(&cmd, 0, sizeof(cmd));
 476         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 477         cmd.action = cpu_to_le16(CMD_ACT_GET);
 478
 479         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 480         if (ret == 0) {
 481                 *curlevel = le16_to_cpu(cmd.curlevel);
 482                 if (minlevel)
 483                         *minlevel = cmd.minlevel;
 484                 if (maxlevel)
 485                         *maxlevel = cmd.maxlevel;
 486         }
 487
 488         lbs_deb_leave(LBS_DEB_CMD);
 489         return ret;
 490 }
 491
 492 /**
 493  *  @brief Set the TX power
 494  *
 495  *  @param priv         A pointer to struct lbs_private structure
 496  *  @param dbm          The desired power level in dBm
 497  *
 498  *  @return             0 on success, error on failure
 499  */
 500 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 501 {
 502         struct cmd_ds_802_11_rf_tx_power cmd;
 503         int ret;
 504
 505         lbs_deb_enter(LBS_DEB_CMD);
 506
 507         memset(&cmd, 0, sizeof(cmd));
 508         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 509         cmd.action = cpu_to_le16(CMD_ACT_SET);
 510         cmd.curlevel = cpu_to_le16(dbm);
 511
 512         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 513
 514         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 515
 516         lbs_deb_leave(LBS_DEB_CMD);
 517         return ret;
 518 }
 519
 520 static int lbs_cmd_802_11_monitor_mode(struct cmd_ds_command *cmd,
 521                                       u16 cmd_action, void *pdata_buf)
 522 {
 523         struct cmd_ds_802_11_monitor_mode *monitor = &cmd->params.monitor;
 524
 525         cmd->command = cpu_to_le16(CMD_802_11_MONITOR_MODE);
 526         cmd->size =
 527             cpu_to_le16(sizeof(struct cmd_ds_802_11_monitor_mode) +
 528                              sizeof(struct cmd_header));
 529
 530         monitor->action = cpu_to_le16(cmd_action);
 531         if (cmd_action == CMD_ACT_SET) {
 532                 monitor->mode =
 533                     cpu_to_le16((u16) (*(u32 *) pdata_buf));
 534         }
 535
 536         return 0;
 537 }
 538
 539 /**
 540  *  @brief Get the radio channel
 541  *
 542  *  @param priv         A pointer to struct lbs_private structure
 543  *
 544  *  @return             The channel on success, error on failure
 545  */
 546 static int lbs_get_channel(struct lbs_private *priv)
 547 {
 548         struct cmd_ds_802_11_rf_channel cmd;
 549         int ret = 0;
 550
 551         lbs_deb_enter(LBS_DEB_CMD);
 552
 553         memset(&cmd, 0, sizeof(cmd));
 554         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 555         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 556
 557         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 558         if (ret)
 559                 goto out;
 560
 561         ret = le16_to_cpu(cmd.channel);
 562         lbs_deb_cmd("current radio channel is %d\n", ret);
 563
 564 out:
 565         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 566         return ret;
 567 }
 568
 569 int lbs_update_channel(struct lbs_private *priv)
 570 {
 571         int ret;
 572
 573         /* the channel in f/w could be out of sync; get the current channel */
 574         lbs_deb_enter(LBS_DEB_ASSOC);
 575
 576         ret = lbs_get_channel(priv);
 577         if (ret > 0) {
 578                 priv->channel = ret;
 579                 ret = 0;
 580         }
 581         lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
 582         return ret;
 583 }
 584
 585 /**
 586  *  @brief Set the radio channel
 587  *
 588  *  @param priv         A pointer to struct lbs_private structure
 589  *  @param channel      The desired channel, or 0 to clear a locked channel
 590  *
 591  *  @return             0 on success, error on failure
 592  */
 593 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 594 {
 595         struct cmd_ds_802_11_rf_channel cmd;
 596 #ifdef DEBUG
 597         u8 old_channel = priv->channel;
 598 #endif
 599         int ret = 0;
 600
 601         lbs_deb_enter(LBS_DEB_CMD);
 602
 603         memset(&cmd, 0, sizeof(cmd));
 604         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 605         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 606         cmd.channel = cpu_to_le16(channel);
 607
 608         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 609         if (ret)
 610                 goto out;
 611
 612         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 613         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 614                 priv->channel);
 615
 616 out:
 617         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 618         return ret;
 619 }
 620
 621 static int lbs_cmd_reg_access(struct cmd_ds_command *cmdptr,
 622                                u8 cmd_action, void *pdata_buf)
 623 {
 624         struct lbs_offset_value *offval;
 625
 626         lbs_deb_enter(LBS_DEB_CMD);
 627
 628         offval = (struct lbs_offset_value *)pdata_buf;
 629
 630         switch (le16_to_cpu(cmdptr->command)) {
 631         case CMD_MAC_REG_ACCESS:
 632                 {
 633                         struct cmd_ds_mac_reg_access *macreg;
 634
 635                         cmdptr->size =
 636                             cpu_to_le16(sizeof (struct cmd_ds_mac_reg_access)
 637                                         + sizeof(struct cmd_header));
 638                         macreg =
 639                             (struct cmd_ds_mac_reg_access *)&cmdptr->params.
 640                             macreg;
 641
 642                         macreg->action = cpu_to_le16(cmd_action);
 643                         macreg->offset = cpu_to_le16((u16) offval->offset);
 644                         macreg->value = cpu_to_le32(offval->value);
 645
 646                         break;
 647                 }
 648
 649         case CMD_BBP_REG_ACCESS:
 650                 {
 651                         struct cmd_ds_bbp_reg_access *bbpreg;
 652
 653                         cmdptr->size =
 654                             cpu_to_le16(sizeof
 655                                              (struct cmd_ds_bbp_reg_access)
 656                                              + sizeof(struct cmd_header));
 657                         bbpreg =
 658                             (struct cmd_ds_bbp_reg_access *)&cmdptr->params.
 659                             bbpreg;
 660
 661                         bbpreg->action = cpu_to_le16(cmd_action);
 662                         bbpreg->offset = cpu_to_le16((u16) offval->offset);
 663                         bbpreg->value = (u8) offval->value;
 664
 665                         break;
 666                 }
 667
 668         case CMD_RF_REG_ACCESS:
 669                 {
 670                         struct cmd_ds_rf_reg_access *rfreg;
 671
 672                         cmdptr->size =
 673                             cpu_to_le16(sizeof
 674                                              (struct cmd_ds_rf_reg_access) +
 675                                              sizeof(struct cmd_header));
 676                         rfreg =
 677                             (struct cmd_ds_rf_reg_access *)&cmdptr->params.
 678                             rfreg;
 679
 680                         rfreg->action = cpu_to_le16(cmd_action);
 681                         rfreg->offset = cpu_to_le16((u16) offval->offset);
 682                         rfreg->value = (u8) offval->value;
 683
 684                         break;
 685                 }
 686
 687         default:
 688                 break;
 689         }
 690
 691         lbs_deb_leave(LBS_DEB_CMD);
 692         return 0;
 693 }
 694
 695 static void lbs_queue_cmd(struct lbs_private *priv,
 696                           struct cmd_ctrl_node *cmdnode)
 697 {
 698         unsigned long flags;
 699         int addtail = 1;
 700
 701         lbs_deb_enter(LBS_DEB_HOST);
 702
 703         if (!cmdnode) {
 704                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 705                 goto done;
 706         }
 707         if (!cmdnode->cmdbuf->size) {
 708                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 709                 goto done;
 710         }
 711         cmdnode->result = 0;
 712
 713         /* Exit_PS command needs to be queued in the header always. */
 714         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 715                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf[1];
 716
 717                 if (psm->action == cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
 718                         if (priv->psstate != PS_STATE_FULL_POWER)
 719                                 addtail = 0;
 720                 }
 721         }
 722
 723         if (le16_to_cpu(cmdnode->cmdbuf->command) ==
 724                         CMD_802_11_WAKEUP_CONFIRM)
 725                 addtail = 0;
 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                 case RADIO_PREAMBLE_AUTO:
 859                 case RADIO_PREAMBLE_LONG:
 860                         cmd.control = cpu_to_le16(preamble);
 861                         break;
 862                 default:
 863                         goto out;
 864                 }
 865         }
 866
 867         if (radio_on)
 868                 cmd.control |= cpu_to_le16(0x1);
 869         else {
 870                 cmd.control &= cpu_to_le16(~0x1);
 871                 priv->txpower_cur = 0;
 872         }
 873
 874         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
 875                     radio_on ? "ON" : "OFF", preamble);
 876
 877         priv->radio_on = radio_on;
 878
 879         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
 880
 881 out:
 882         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 883         return ret;
 884 }
 885
 886 void lbs_set_mac_control(struct lbs_private *priv)
 887 {
 888         struct cmd_ds_mac_control cmd;
 889
 890         lbs_deb_enter(LBS_DEB_CMD);
 891
 892         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 893         cmd.action = cpu_to_le16(priv->mac_control);
 894         cmd.reserved = 0;
 895
 896         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
 897
 898         lbs_deb_leave(LBS_DEB_CMD);
 899 }
 900
 901 /**
 902  *  @brief This function prepare the command before send to firmware.
 903  *
 904  *  @param priv         A pointer to struct lbs_private structure
 905  *  @param cmd_no       command number
 906  *  @param cmd_action   command action: GET or SET
 907  *  @param wait_option  wait option: wait response or not
 908  *  @param cmd_oid      cmd oid: treated as sub command
 909  *  @param pdata_buf    A pointer to informaion buffer
 910  *  @return             0 or -1
 911  */
 912 int lbs_prepare_and_send_command(struct lbs_private *priv,
 913                           u16 cmd_no,
 914                           u16 cmd_action,
 915                           u16 wait_option, u32 cmd_oid, void *pdata_buf)
 916 {
 917         int ret = 0;
 918         struct cmd_ctrl_node *cmdnode;
 919         struct cmd_ds_command *cmdptr;
 920         unsigned long flags;
 921
 922         lbs_deb_enter(LBS_DEB_HOST);
 923
 924         if (!priv) {
 925                 lbs_deb_host("PREP_CMD: priv is NULL\n");
 926                 ret = -1;
 927                 goto done;
 928         }
 929
 930         if (priv->surpriseremoved) {
 931                 lbs_deb_host("PREP_CMD: card removed\n");
 932                 ret = -1;
 933                 goto done;
 934         }
 935
 936         if (!lbs_is_cmd_allowed(priv)) {
 937                 ret = -EBUSY;
 938                 goto done;
 939         }
 940
 941         cmdnode = lbs_get_cmd_ctrl_node(priv);
 942
 943         if (cmdnode == NULL) {
 944                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
 945
 946                 /* Wake up main thread to execute next command */
 947                 wake_up_interruptible(&priv->waitq);
 948                 ret = -1;
 949                 goto done;
 950         }
 951
 952         cmdnode->callback = NULL;
 953         cmdnode->callback_arg = (unsigned long)pdata_buf;
 954
 955         cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
 956
 957         lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
 958
 959         /* Set sequence number, command and INT option */
 960         priv->seqnum++;
 961         cmdptr->seqnum = cpu_to_le16(priv->seqnum);
 962
 963         cmdptr->command = cpu_to_le16(cmd_no);
 964         cmdptr->result = 0;
 965
 966         switch (cmd_no) {
 967         case CMD_802_11_PS_MODE:
 968                 ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
 969                 break;
 970
 971         case CMD_MAC_REG_ACCESS:
 972         case CMD_BBP_REG_ACCESS:
 973         case CMD_RF_REG_ACCESS:
 974                 ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
 975                 break;
 976
 977         case CMD_802_11_MONITOR_MODE:
 978                 ret = lbs_cmd_802_11_monitor_mode(cmdptr,
 979                                           cmd_action, pdata_buf);
 980                 break;
 981
 982         case CMD_802_11_RSSI:
 983                 ret = lbs_cmd_802_11_rssi(priv, cmdptr);
 984                 break;
 985
 986         case CMD_802_11_SET_AFC:
 987         case CMD_802_11_GET_AFC:
 988
 989                 cmdptr->command = cpu_to_le16(cmd_no);
 990                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
 991                                            sizeof(struct cmd_header));
 992
 993                 memmove(&cmdptr->params.afc,
 994                         pdata_buf, sizeof(struct cmd_ds_802_11_afc));
 995
 996                 ret = 0;
 997                 goto done;
 998
 999         case CMD_802_11_TPC_CFG:
1000                 cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
1001                 cmdptr->size =
1002                     cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
1003                                      sizeof(struct cmd_header));
1004
1005                 memmove(&cmdptr->params.tpccfg,
1006                         pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
1007
1008                 ret = 0;
1009                 break;
1010
1011 #ifdef CONFIG_LIBERTAS_MESH
1012
1013         case CMD_BT_ACCESS:
1014                 ret = lbs_cmd_bt_access(cmdptr, cmd_action, pdata_buf);
1015                 break;
1016
1017         case CMD_FWT_ACCESS:
1018                 ret = lbs_cmd_fwt_access(cmdptr, cmd_action, pdata_buf);
1019                 break;
1020
1021 #endif
1022
1023         case CMD_802_11_BEACON_CTRL:
1024                 ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
1025                 break;
1026         case CMD_802_11_DEEP_SLEEP:
1027                 cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
1028                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
1029                 break;
1030         default:
1031                 lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
1032                 ret = -1;
1033                 break;
1034         }
1035
1036         /* return error, since the command preparation failed */
1037         if (ret != 0) {
1038                 lbs_deb_host("PREP_CMD: command preparation failed\n");
1039                 lbs_cleanup_and_insert_cmd(priv, cmdnode);
1040                 ret = -1;
1041                 goto done;
1042         }
1043
1044         cmdnode->cmdwaitqwoken = 0;
1045
1046         lbs_queue_cmd(priv, cmdnode);
1047         wake_up_interruptible(&priv->waitq);
1048
1049         if (wait_option & CMD_OPTION_WAITFORRSP) {
1050                 lbs_deb_host("PREP_CMD: wait for response\n");
1051                 might_sleep();
1052                 wait_event_interruptible(cmdnode->cmdwait_q,
1053                                          cmdnode->cmdwaitqwoken);
1054         }
1055
1056         spin_lock_irqsave(&priv->driver_lock, flags);
1057         if (priv->cur_cmd_retcode) {
1058                 lbs_deb_host("PREP_CMD: command failed with return code %d\n",
1059                        priv->cur_cmd_retcode);
1060                 priv->cur_cmd_retcode = 0;
1061                 ret = -1;
1062         }
1063         spin_unlock_irqrestore(&priv->driver_lock, flags);
1064
1065 done:
1066         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1067         return ret;
1068 }
1069
1070 /**
1071  *  @brief This function allocates the command buffer and link
1072  *  it to command free queue.
1073  *
1074  *  @param priv         A pointer to struct lbs_private structure
1075  *  @return             0 or -1
1076  */
1077 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1078 {
1079         int ret = 0;
1080         u32 bufsize;
1081         u32 i;
1082         struct cmd_ctrl_node *cmdarray;
1083
1084         lbs_deb_enter(LBS_DEB_HOST);
1085
1086         /* Allocate and initialize the command array */
1087         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1088         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1089                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1090                 ret = -1;
1091                 goto done;
1092         }
1093         priv->cmd_array = cmdarray;
1094
1095         /* Allocate and initialize each command buffer in the command array */
1096         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1097                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1098                 if (!cmdarray[i].cmdbuf) {
1099                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1100                         ret = -1;
1101                         goto done;
1102                 }
1103         }
1104
1105         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1106                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1107                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1108         }
1109         ret = 0;
1110
1111 done:
1112         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1113         return ret;
1114 }
1115
1116 /**
1117  *  @brief This function frees the command buffer.
1118  *
1119  *  @param priv         A pointer to struct lbs_private structure
1120  *  @return             0 or -1
1121  */
1122 int lbs_free_cmd_buffer(struct lbs_private *priv)
1123 {
1124         struct cmd_ctrl_node *cmdarray;
1125         unsigned int i;
1126
1127         lbs_deb_enter(LBS_DEB_HOST);
1128
1129         /* need to check if cmd array is allocated or not */
1130         if (priv->cmd_array == NULL) {
1131                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1132                 goto done;
1133         }
1134
1135         cmdarray = priv->cmd_array;
1136
1137         /* Release shared memory buffers */
1138         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1139                 if (cmdarray[i].cmdbuf) {
1140                         kfree(cmdarray[i].cmdbuf);
1141                         cmdarray[i].cmdbuf = NULL;
1142                 }
1143         }
1144
1145         /* Release cmd_ctrl_node */
1146         if (priv->cmd_array) {
1147                 kfree(priv->cmd_array);
1148                 priv->cmd_array = NULL;
1149         }
1150
1151 done:
1152         lbs_deb_leave(LBS_DEB_HOST);
1153         return 0;
1154 }
1155
1156 /**
1157  *  @brief This function gets a free command node if available in
1158  *  command free queue.
1159  *
1160  *  @param priv         A pointer to struct lbs_private structure
1161  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1162  */
1163 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv)
1164 {
1165         struct cmd_ctrl_node *tempnode;
1166         unsigned long flags;
1167
1168         lbs_deb_enter(LBS_DEB_HOST);
1169
1170         if (!priv)
1171                 return NULL;
1172
1173         spin_lock_irqsave(&priv->driver_lock, flags);
1174
1175         if (!list_empty(&priv->cmdfreeq)) {
1176                 tempnode = list_first_entry(&priv->cmdfreeq,
1177                                             struct cmd_ctrl_node, list);
1178                 list_del(&tempnode->list);
1179         } else {
1180                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1181                 tempnode = NULL;
1182         }
1183
1184         spin_unlock_irqrestore(&priv->driver_lock, flags);
1185
1186         lbs_deb_leave(LBS_DEB_HOST);
1187         return tempnode;
1188 }
1189
1190 /**
1191  *  @brief This function executes next command in command
1192  *  pending queue. It will put firmware back to PS mode
1193  *  if applicable.
1194  *
1195  *  @param priv     A pointer to struct lbs_private structure
1196  *  @return        0 or -1
1197  */
1198 int lbs_execute_next_command(struct lbs_private *priv)
1199 {
1200         struct cmd_ctrl_node *cmdnode = NULL;
1201         struct cmd_header *cmd;
1202         unsigned long flags;
1203         int ret = 0;
1204
1205         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1206          * only caller to us is lbs_thread() and we get even when a
1207          * data packet is received */
1208         lbs_deb_enter(LBS_DEB_THREAD);
1209
1210         spin_lock_irqsave(&priv->driver_lock, flags);
1211
1212         if (priv->cur_cmd) {
1213                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1214                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1215                 ret = -1;
1216                 goto done;
1217         }
1218
1219         if (!list_empty(&priv->cmdpendingq)) {
1220                 cmdnode = list_first_entry(&priv->cmdpendingq,
1221                                            struct cmd_ctrl_node, list);
1222         }
1223
1224         spin_unlock_irqrestore(&priv->driver_lock, flags);
1225
1226         if (cmdnode) {
1227                 cmd = cmdnode->cmdbuf;
1228
1229                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1230                         if ((priv->psstate == PS_STATE_SLEEP) ||
1231                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1232                                 lbs_deb_host(
1233                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1234                                        le16_to_cpu(cmd->command),
1235                                        priv->psstate);
1236                                 ret = -1;
1237                                 goto done;
1238                         }
1239                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1240                                      "0x%04x in psstate %d\n",
1241                                      le16_to_cpu(cmd->command), priv->psstate);
1242                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1243                         /*
1244                          * 1. Non-PS command:
1245                          * Queue it. set needtowakeup to TRUE if current state
1246                          * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
1247                          * 2. PS command but not Exit_PS:
1248                          * Ignore it.
1249                          * 3. PS command Exit_PS:
1250                          * Set needtowakeup to TRUE if current state is SLEEP,
1251                          * otherwise send this command down to firmware
1252                          * immediately.
1253                          */
1254                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1255                                 /*  Prepare to send Exit PS,
1256                                  *  this non PS command will be sent later */
1257                                 if ((priv->psstate == PS_STATE_SLEEP)
1258                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1259                                     ) {
1260                                         /* w/ new scheme, it will not reach here.
1261                                            since it is blocked in main_thread. */
1262                                         priv->needtowakeup = 1;
1263                                 } else
1264                                         lbs_ps_wakeup(priv, 0);
1265
1266                                 ret = 0;
1267                                 goto done;
1268                         } else {
1269                                 /*
1270                                  * PS command. Ignore it if it is not Exit_PS.
1271                                  * otherwise send it down immediately.
1272                                  */
1273                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1274
1275                                 lbs_deb_host(
1276                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1277                                        psm->action);
1278                                 if (psm->action !=
1279                                     cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
1280                                         lbs_deb_host(
1281                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1282                                         list_del(&cmdnode->list);
1283                                         spin_lock_irqsave(&priv->driver_lock, flags);
1284                                         lbs_complete_command(priv, cmdnode, 0);
1285                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1286
1287                                         ret = 0;
1288                                         goto done;
1289                                 }
1290
1291                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1292                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1293                                         lbs_deb_host(
1294                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1295                                         list_del(&cmdnode->list);
1296                                         spin_lock_irqsave(&priv->driver_lock, flags);
1297                                         lbs_complete_command(priv, cmdnode, 0);
1298                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1299                                         priv->needtowakeup = 1;
1300
1301                                         ret = 0;
1302                                         goto done;
1303                                 }
1304
1305                                 lbs_deb_host(
1306                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1307                         }
1308                 }
1309                 list_del(&cmdnode->list);
1310                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1311                             le16_to_cpu(cmd->command));
1312                 lbs_submit_command(priv, cmdnode);
1313         } else {
1314                 /*
1315                  * check if in power save mode, if yes, put the device back
1316                  * to PS mode
1317                  */
1318 #ifdef TODO
1319                 /*
1320                  * This was the old code for libertas+wext. Someone that
1321                  * understands this beast should re-code it in a sane way.
1322                  *
1323                  * I actually don't understand why this is related to WPA
1324                  * and to connection status, shouldn't powering should be
1325                  * independ of such things?
1326                  */
1327                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1328                     (priv->psstate == PS_STATE_FULL_POWER) &&
1329                     ((priv->connect_status == LBS_CONNECTED) ||
1330                     lbs_mesh_connected(priv))) {
1331                         if (priv->secinfo.WPAenabled ||
1332                             priv->secinfo.WPA2enabled) {
1333                                 /* check for valid WPA group keys */
1334                                 if (priv->wpa_mcast_key.len ||
1335                                     priv->wpa_unicast_key.len) {
1336                                         lbs_deb_host(
1337                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1338                                                " go back to PS_SLEEP");
1339                                         lbs_ps_sleep(priv, 0);
1340                                 }
1341                         } else {
1342                                 lbs_deb_host(
1343                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1344                                        "go back to PS_SLEEP");
1345                                 lbs_ps_sleep(priv, 0);
1346                         }
1347                 }
1348 #endif
1349         }
1350
1351         ret = 0;
1352 done:
1353         lbs_deb_leave(LBS_DEB_THREAD);
1354         return ret;
1355 }
1356
1357 static void lbs_send_confirmsleep(struct lbs_private *priv)
1358 {
1359         unsigned long flags;
1360         int ret;
1361
1362         lbs_deb_enter(LBS_DEB_HOST);
1363         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1364                 sizeof(confirm_sleep));
1365
1366         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1367                 sizeof(confirm_sleep));
1368         if (ret) {
1369                 lbs_pr_alert("confirm_sleep failed\n");
1370                 goto out;
1371         }
1372
1373         spin_lock_irqsave(&priv->driver_lock, flags);
1374
1375         /* We don't get a response on the sleep-confirmation */
1376         priv->dnld_sent = DNLD_RES_RECEIVED;
1377
1378         if (priv->is_host_sleep_configured) {
1379                 priv->is_host_sleep_activated = 1;
1380                 wake_up_interruptible(&priv->host_sleep_q);
1381         }
1382
1383         /* If nothing to do, go back to sleep (?) */
1384         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1385                 priv->psstate = PS_STATE_SLEEP;
1386
1387         spin_unlock_irqrestore(&priv->driver_lock, flags);
1388
1389 out:
1390         lbs_deb_leave(LBS_DEB_HOST);
1391 }
1392
1393 void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
1394 {
1395         lbs_deb_enter(LBS_DEB_HOST);
1396
1397         /*
1398          * PS is currently supported only in Infrastructure mode
1399          * Remove this check if it is to be supported in IBSS mode also
1400          */
1401
1402         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1403                               CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
1404
1405         lbs_deb_leave(LBS_DEB_HOST);
1406 }
1407
1408 /**
1409  *  @brief This function sends Exit_PS command to firmware.
1410  *
1411  *  @param priv         A pointer to struct lbs_private structure
1412  *  @param wait_option  wait response or not
1413  *  @return             n/a
1414  */
1415 void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
1416 {
1417         __le32 Localpsmode;
1418
1419         lbs_deb_enter(LBS_DEB_HOST);
1420
1421         Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
1422
1423         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1424                               CMD_SUBCMD_EXIT_PS,
1425                               wait_option, 0, &Localpsmode);
1426
1427         lbs_deb_leave(LBS_DEB_HOST);
1428 }
1429
1430 /**
1431  *  @brief This function checks condition and prepares to
1432  *  send sleep confirm command to firmware if ok.
1433  *
1434  *  @param priv         A pointer to struct lbs_private structure
1435  *  @param psmode       Power Saving mode
1436  *  @return             n/a
1437  */
1438 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1439 {
1440         unsigned long flags =0;
1441         int allowed = 1;
1442
1443         lbs_deb_enter(LBS_DEB_HOST);
1444
1445         spin_lock_irqsave(&priv->driver_lock, flags);
1446         if (priv->dnld_sent) {
1447                 allowed = 0;
1448                 lbs_deb_host("dnld_sent was set\n");
1449         }
1450
1451         /* In-progress command? */
1452         if (priv->cur_cmd) {
1453                 allowed = 0;
1454                 lbs_deb_host("cur_cmd was set\n");
1455         }
1456
1457         /* Pending events or command responses? */
1458         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1459                 allowed = 0;
1460                 lbs_deb_host("pending events or command responses\n");
1461         }
1462         spin_unlock_irqrestore(&priv->driver_lock, flags);
1463
1464         if (allowed) {
1465                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1466                 lbs_send_confirmsleep(priv);
1467         } else {
1468                 lbs_deb_host("sleep confirm has been delayed\n");
1469         }
1470
1471         lbs_deb_leave(LBS_DEB_HOST);
1472 }
1473
1474
1475 /**
1476  * @brief Configures the transmission power control functionality.
1477  *
1478  * @param priv          A pointer to struct lbs_private structure
1479  * @param enable        Transmission power control enable
1480  * @param p0            Power level when link quality is good (dBm).
1481  * @param p1            Power level when link quality is fair (dBm).
1482  * @param p2            Power level when link quality is poor (dBm).
1483  * @param usesnr        Use Signal to Noise Ratio in TPC
1484  *
1485  * @return 0 on success
1486  */
1487 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1488                 int8_t p2, int usesnr)
1489 {
1490         struct cmd_ds_802_11_tpc_cfg cmd;
1491         int ret;
1492
1493         memset(&cmd, 0, sizeof(cmd));
1494         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1495         cmd.action = cpu_to_le16(CMD_ACT_SET);
1496         cmd.enable = !!enable;
1497         cmd.usesnr = !!usesnr;
1498         cmd.P0 = p0;
1499         cmd.P1 = p1;
1500         cmd.P2 = p2;
1501
1502         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1503
1504         return ret;
1505 }
1506
1507 /**
1508  * @brief Configures the power adaptation settings.
1509  *
1510  * @param priv          A pointer to struct lbs_private structure
1511  * @param enable        Power adaptation enable
1512  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1513  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1514  * @param p2            Power level for 48 and 54 Mbps (dBm).
1515  *
1516  * @return 0 on Success
1517  */
1518
1519 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1520                 int8_t p1, int8_t p2)
1521 {
1522         struct cmd_ds_802_11_pa_cfg cmd;
1523         int ret;
1524
1525         memset(&cmd, 0, sizeof(cmd));
1526         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1527         cmd.action = cpu_to_le16(CMD_ACT_SET);
1528         cmd.enable = !!enable;
1529         cmd.P0 = p0;
1530         cmd.P1 = p1;
1531         cmd.P2 = p2;
1532
1533         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1534
1535         return ret;
1536 }
1537
1538
1539 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1540         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1541         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1542         unsigned long callback_arg)
1543 {
1544         struct cmd_ctrl_node *cmdnode;
1545
1546         lbs_deb_enter(LBS_DEB_HOST);
1547
1548         if (priv->surpriseremoved) {
1549                 lbs_deb_host("PREP_CMD: card removed\n");
1550                 cmdnode = ERR_PTR(-ENOENT);
1551                 goto done;
1552         }
1553
1554         if (!lbs_is_cmd_allowed(priv)) {
1555                 cmdnode = ERR_PTR(-EBUSY);
1556                 goto done;
1557         }
1558
1559         cmdnode = lbs_get_cmd_ctrl_node(priv);
1560         if (cmdnode == NULL) {
1561                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1562
1563                 /* Wake up main thread to execute next command */
1564                 wake_up_interruptible(&priv->waitq);
1565                 cmdnode = ERR_PTR(-ENOBUFS);
1566                 goto done;
1567         }
1568
1569         cmdnode->callback = callback;
1570         cmdnode->callback_arg = callback_arg;
1571
1572         /* Copy the incoming command to the buffer */
1573         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1574
1575         /* Set sequence number, clean result, move to buffer */
1576         priv->seqnum++;
1577         cmdnode->cmdbuf->command = cpu_to_le16(command);
1578         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1579         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1580         cmdnode->cmdbuf->result  = 0;
1581
1582         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1583
1584         cmdnode->cmdwaitqwoken = 0;
1585         lbs_queue_cmd(priv, cmdnode);
1586         wake_up_interruptible(&priv->waitq);
1587
1588  done:
1589         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1590         return cmdnode;
1591 }
1592
1593 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1594         struct cmd_header *in_cmd, int in_cmd_size)
1595 {
1596         lbs_deb_enter(LBS_DEB_CMD);
1597         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1598                 lbs_cmd_async_callback, 0);
1599         lbs_deb_leave(LBS_DEB_CMD);
1600 }
1601
1602 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1603               struct cmd_header *in_cmd, int in_cmd_size,
1604               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1605               unsigned long callback_arg)
1606 {
1607         struct cmd_ctrl_node *cmdnode;
1608         unsigned long flags;
1609         int ret = 0;
1610
1611         lbs_deb_enter(LBS_DEB_HOST);
1612
1613         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1614                                   callback, callback_arg);
1615         if (IS_ERR(cmdnode)) {
1616                 ret = PTR_ERR(cmdnode);
1617                 goto done;
1618         }
1619
1620         might_sleep();
1621         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1622
1623         spin_lock_irqsave(&priv->driver_lock, flags);
1624         ret = cmdnode->result;
1625         if (ret)
1626                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1627                             command, ret);
1628
1629         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1630         spin_unlock_irqrestore(&priv->driver_lock, flags);
1631
1632 done:
1633         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1634         return ret;
1635 }
1636 EXPORT_SYMBOL_GPL(__lbs_cmd);