drivers/net/wireless/libertas/cmd.c

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