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 implements command CMD_802_11D_DOMAIN_INFO
 903  *  @param priv       pointer to struct lbs_private
 904  *  @param cmd        pointer to cmd buffer
 905  *  @param cmdno      cmd ID
 906  *  @param cmdOption  cmd action
 907  *  @return           0
 908 */
 909 int lbs_cmd_802_11d_domain_info(struct lbs_private *priv,
 910                                  struct cmd_ds_command *cmd,
 911                                  u16 cmdoption)
 912 {
 913         struct cmd_ds_802_11d_domain_info *pdomaininfo =
 914             &cmd->params.domaininfo;
 915         struct mrvl_ie_domain_param_set *domain = &pdomaininfo->domain;
 916         u8 nr_triplet = priv->domain_reg.no_triplet;
 917
 918         lbs_deb_enter(LBS_DEB_11D);
 919
 920         lbs_deb_11d("nr_triplet=%x\n", nr_triplet);
 921
 922         pdomaininfo->action = cpu_to_le16(cmdoption);
 923         if (cmdoption == CMD_ACT_GET) {
 924                 cmd->size = cpu_to_le16(sizeof(pdomaininfo->action) +
 925                                         sizeof(struct cmd_header));
 926                 lbs_deb_hex(LBS_DEB_11D, "802_11D_DOMAIN_INFO", (u8 *) cmd,
 927                         le16_to_cpu(cmd->size));
 928                 goto done;
 929         }
 930
 931         domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 932         memcpy(domain->countrycode, priv->domain_reg.country_code,
 933                sizeof(domain->countrycode));
 934
 935         domain->header.len = cpu_to_le16(nr_triplet
 936                                 * sizeof(struct ieee80211_country_ie_triplet)
 937                                 + sizeof(domain->countrycode));
 938
 939         if (nr_triplet) {
 940                 memcpy(domain->triplet, priv->domain_reg.triplet,
 941                                 nr_triplet *
 942                                 sizeof(struct ieee80211_country_ie_triplet));
 943
 944                 cmd->size = cpu_to_le16(sizeof(pdomaininfo->action) +
 945                                              le16_to_cpu(domain->header.len) +
 946                                              sizeof(struct mrvl_ie_header) +
 947                                              sizeof(struct cmd_header));
 948         } else {
 949                 cmd->size = cpu_to_le16(sizeof(pdomaininfo->action) +
 950                                         sizeof(struct cmd_header));
 951         }
 952
 953         lbs_deb_hex(LBS_DEB_11D, "802_11D_DOMAIN_INFO", (u8 *) cmd,
 954                         le16_to_cpu(cmd->size));
 955
 956 done:
 957         lbs_deb_enter(LBS_DEB_11D);
 958         return 0;
 959 }
 960
 961 /**
 962  *  @brief This function prepare the command before send to firmware.
 963  *
 964  *  @param priv         A pointer to struct lbs_private structure
 965  *  @param cmd_no       command number
 966  *  @param cmd_action   command action: GET or SET
 967  *  @param wait_option  wait option: wait response or not
 968  *  @param cmd_oid      cmd oid: treated as sub command
 969  *  @param pdata_buf    A pointer to informaion buffer
 970  *  @return             0 or -1
 971  */
 972 int lbs_prepare_and_send_command(struct lbs_private *priv,
 973                           u16 cmd_no,
 974                           u16 cmd_action,
 975                           u16 wait_option, u32 cmd_oid, void *pdata_buf)
 976 {
 977         int ret = 0;
 978         struct cmd_ctrl_node *cmdnode;
 979         struct cmd_ds_command *cmdptr;
 980         unsigned long flags;
 981
 982         lbs_deb_enter(LBS_DEB_HOST);
 983
 984         if (!priv) {
 985                 lbs_deb_host("PREP_CMD: priv is NULL\n");
 986                 ret = -1;
 987                 goto done;
 988         }
 989
 990         if (priv->surpriseremoved) {
 991                 lbs_deb_host("PREP_CMD: card removed\n");
 992                 ret = -1;
 993                 goto done;
 994         }
 995
 996         if (!lbs_is_cmd_allowed(priv)) {
 997                 ret = -EBUSY;
 998                 goto done;
 999         }
1000
1001         cmdnode = lbs_get_cmd_ctrl_node(priv);
1002
1003         if (cmdnode == NULL) {
1004                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1005
1006                 /* Wake up main thread to execute next command */
1007                 wake_up_interruptible(&priv->waitq);
1008                 ret = -1;
1009                 goto done;
1010         }
1011
1012         cmdnode->callback = NULL;
1013         cmdnode->callback_arg = (unsigned long)pdata_buf;
1014
1015         cmdptr = (struct cmd_ds_command *)cmdnode->cmdbuf;
1016
1017         lbs_deb_host("PREP_CMD: command 0x%04x\n", cmd_no);
1018
1019         /* Set sequence number, command and INT option */
1020         priv->seqnum++;
1021         cmdptr->seqnum = cpu_to_le16(priv->seqnum);
1022
1023         cmdptr->command = cpu_to_le16(cmd_no);
1024         cmdptr->result = 0;
1025
1026         switch (cmd_no) {
1027         case CMD_802_11_PS_MODE:
1028                 ret = lbs_cmd_802_11_ps_mode(cmdptr, cmd_action);
1029                 break;
1030
1031         case CMD_MAC_REG_ACCESS:
1032         case CMD_BBP_REG_ACCESS:
1033         case CMD_RF_REG_ACCESS:
1034                 ret = lbs_cmd_reg_access(cmdptr, cmd_action, pdata_buf);
1035                 break;
1036
1037         case CMD_802_11_MONITOR_MODE:
1038                 ret = lbs_cmd_802_11_monitor_mode(cmdptr,
1039                                           cmd_action, pdata_buf);
1040                 break;
1041
1042         case CMD_802_11_RSSI:
1043                 ret = lbs_cmd_802_11_rssi(priv, cmdptr);
1044                 break;
1045
1046         case CMD_802_11_SET_AFC:
1047         case CMD_802_11_GET_AFC:
1048
1049                 cmdptr->command = cpu_to_le16(cmd_no);
1050                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_ds_802_11_afc) +
1051                                            sizeof(struct cmd_header));
1052
1053                 memmove(&cmdptr->params.afc,
1054                         pdata_buf, sizeof(struct cmd_ds_802_11_afc));
1055
1056                 ret = 0;
1057                 goto done;
1058
1059         case CMD_802_11D_DOMAIN_INFO:
1060                 cmdptr->command = cpu_to_le16(cmd_no);
1061                 ret = lbs_cmd_802_11d_domain_info(priv, cmdptr, cmd_action);
1062                 break;
1063
1064         case CMD_802_11_TPC_CFG:
1065                 cmdptr->command = cpu_to_le16(CMD_802_11_TPC_CFG);
1066                 cmdptr->size =
1067                     cpu_to_le16(sizeof(struct cmd_ds_802_11_tpc_cfg) +
1068                                      sizeof(struct cmd_header));
1069
1070                 memmove(&cmdptr->params.tpccfg,
1071                         pdata_buf, sizeof(struct cmd_ds_802_11_tpc_cfg));
1072
1073                 ret = 0;
1074                 break;
1075
1076 #ifdef CONFIG_LIBERTAS_MESH
1077
1078         case CMD_BT_ACCESS:
1079                 ret = lbs_cmd_bt_access(cmdptr, cmd_action, pdata_buf);
1080                 break;
1081
1082         case CMD_FWT_ACCESS:
1083                 ret = lbs_cmd_fwt_access(cmdptr, cmd_action, pdata_buf);
1084                 break;
1085
1086 #endif
1087
1088         case CMD_802_11_BEACON_CTRL:
1089                 ret = lbs_cmd_bcn_ctrl(priv, cmdptr, cmd_action);
1090                 break;
1091         case CMD_802_11_DEEP_SLEEP:
1092                 cmdptr->command = cpu_to_le16(CMD_802_11_DEEP_SLEEP);
1093                 cmdptr->size = cpu_to_le16(sizeof(struct cmd_header));
1094                 break;
1095         default:
1096                 lbs_pr_err("PREP_CMD: unknown command 0x%04x\n", cmd_no);
1097                 ret = -1;
1098                 break;
1099         }
1100
1101         /* return error, since the command preparation failed */
1102         if (ret != 0) {
1103                 lbs_deb_host("PREP_CMD: command preparation failed\n");
1104                 lbs_cleanup_and_insert_cmd(priv, cmdnode);
1105                 ret = -1;
1106                 goto done;
1107         }
1108
1109         cmdnode->cmdwaitqwoken = 0;
1110
1111         lbs_queue_cmd(priv, cmdnode);
1112         wake_up_interruptible(&priv->waitq);
1113
1114         if (wait_option & CMD_OPTION_WAITFORRSP) {
1115                 lbs_deb_host("PREP_CMD: wait for response\n");
1116                 might_sleep();
1117                 wait_event_interruptible(cmdnode->cmdwait_q,
1118                                          cmdnode->cmdwaitqwoken);
1119         }
1120
1121         spin_lock_irqsave(&priv->driver_lock, flags);
1122         if (priv->cur_cmd_retcode) {
1123                 lbs_deb_host("PREP_CMD: command failed with return code %d\n",
1124                        priv->cur_cmd_retcode);
1125                 priv->cur_cmd_retcode = 0;
1126                 ret = -1;
1127         }
1128         spin_unlock_irqrestore(&priv->driver_lock, flags);
1129
1130 done:
1131         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1132         return ret;
1133 }
1134
1135 /**
1136  *  @brief This function allocates the command buffer and link
1137  *  it to command free queue.
1138  *
1139  *  @param priv         A pointer to struct lbs_private structure
1140  *  @return             0 or -1
1141  */
1142 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1143 {
1144         int ret = 0;
1145         u32 bufsize;
1146         u32 i;
1147         struct cmd_ctrl_node *cmdarray;
1148
1149         lbs_deb_enter(LBS_DEB_HOST);
1150
1151         /* Allocate and initialize the command array */
1152         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1153         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1154                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1155                 ret = -1;
1156                 goto done;
1157         }
1158         priv->cmd_array = cmdarray;
1159
1160         /* Allocate and initialize each command buffer in the command array */
1161         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1162                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1163                 if (!cmdarray[i].cmdbuf) {
1164                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1165                         ret = -1;
1166                         goto done;
1167                 }
1168         }
1169
1170         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1171                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1172                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1173         }
1174         ret = 0;
1175
1176 done:
1177         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1178         return ret;
1179 }
1180
1181 /**
1182  *  @brief This function frees the command buffer.
1183  *
1184  *  @param priv         A pointer to struct lbs_private structure
1185  *  @return             0 or -1
1186  */
1187 int lbs_free_cmd_buffer(struct lbs_private *priv)
1188 {
1189         struct cmd_ctrl_node *cmdarray;
1190         unsigned int i;
1191
1192         lbs_deb_enter(LBS_DEB_HOST);
1193
1194         /* need to check if cmd array is allocated or not */
1195         if (priv->cmd_array == NULL) {
1196                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1197                 goto done;
1198         }
1199
1200         cmdarray = priv->cmd_array;
1201
1202         /* Release shared memory buffers */
1203         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1204                 if (cmdarray[i].cmdbuf) {
1205                         kfree(cmdarray[i].cmdbuf);
1206                         cmdarray[i].cmdbuf = NULL;
1207                 }
1208         }
1209
1210         /* Release cmd_ctrl_node */
1211         if (priv->cmd_array) {
1212                 kfree(priv->cmd_array);
1213                 priv->cmd_array = NULL;
1214         }
1215
1216 done:
1217         lbs_deb_leave(LBS_DEB_HOST);
1218         return 0;
1219 }
1220
1221 /**
1222  *  @brief This function gets a free command node if available in
1223  *  command free queue.
1224  *
1225  *  @param priv         A pointer to struct lbs_private structure
1226  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1227  */
1228 static struct cmd_ctrl_node *lbs_get_cmd_ctrl_node(struct lbs_private *priv)
1229 {
1230         struct cmd_ctrl_node *tempnode;
1231         unsigned long flags;
1232
1233         lbs_deb_enter(LBS_DEB_HOST);
1234
1235         if (!priv)
1236                 return NULL;
1237
1238         spin_lock_irqsave(&priv->driver_lock, flags);
1239
1240         if (!list_empty(&priv->cmdfreeq)) {
1241                 tempnode = list_first_entry(&priv->cmdfreeq,
1242                                             struct cmd_ctrl_node, list);
1243                 list_del(&tempnode->list);
1244         } else {
1245                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1246                 tempnode = NULL;
1247         }
1248
1249         spin_unlock_irqrestore(&priv->driver_lock, flags);
1250
1251         lbs_deb_leave(LBS_DEB_HOST);
1252         return tempnode;
1253 }
1254
1255 /**
1256  *  @brief This function executes next command in command
1257  *  pending queue. It will put firmware back to PS mode
1258  *  if applicable.
1259  *
1260  *  @param priv     A pointer to struct lbs_private structure
1261  *  @return        0 or -1
1262  */
1263 int lbs_execute_next_command(struct lbs_private *priv)
1264 {
1265         struct cmd_ctrl_node *cmdnode = NULL;
1266         struct cmd_header *cmd;
1267         unsigned long flags;
1268         int ret = 0;
1269
1270         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1271          * only caller to us is lbs_thread() and we get even when a
1272          * data packet is received */
1273         lbs_deb_enter(LBS_DEB_THREAD);
1274
1275         spin_lock_irqsave(&priv->driver_lock, flags);
1276
1277         if (priv->cur_cmd) {
1278                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1279                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1280                 ret = -1;
1281                 goto done;
1282         }
1283
1284         if (!list_empty(&priv->cmdpendingq)) {
1285                 cmdnode = list_first_entry(&priv->cmdpendingq,
1286                                            struct cmd_ctrl_node, list);
1287         }
1288
1289         spin_unlock_irqrestore(&priv->driver_lock, flags);
1290
1291         if (cmdnode) {
1292                 cmd = cmdnode->cmdbuf;
1293
1294                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1295                         if ((priv->psstate == PS_STATE_SLEEP) ||
1296                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1297                                 lbs_deb_host(
1298                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1299                                        le16_to_cpu(cmd->command),
1300                                        priv->psstate);
1301                                 ret = -1;
1302                                 goto done;
1303                         }
1304                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1305                                      "0x%04x in psstate %d\n",
1306                                      le16_to_cpu(cmd->command), priv->psstate);
1307                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1308                         /*
1309                          * 1. Non-PS command:
1310                          * Queue it. set needtowakeup to TRUE if current state
1311                          * is SLEEP, otherwise call lbs_ps_wakeup to send Exit_PS.
1312                          * 2. PS command but not Exit_PS:
1313                          * Ignore it.
1314                          * 3. PS command Exit_PS:
1315                          * Set needtowakeup to TRUE if current state is SLEEP,
1316                          * otherwise send this command down to firmware
1317                          * immediately.
1318                          */
1319                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1320                                 /*  Prepare to send Exit PS,
1321                                  *  this non PS command will be sent later */
1322                                 if ((priv->psstate == PS_STATE_SLEEP)
1323                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1324                                     ) {
1325                                         /* w/ new scheme, it will not reach here.
1326                                            since it is blocked in main_thread. */
1327                                         priv->needtowakeup = 1;
1328                                 } else
1329                                         lbs_ps_wakeup(priv, 0);
1330
1331                                 ret = 0;
1332                                 goto done;
1333                         } else {
1334                                 /*
1335                                  * PS command. Ignore it if it is not Exit_PS.
1336                                  * otherwise send it down immediately.
1337                                  */
1338                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1339
1340                                 lbs_deb_host(
1341                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1342                                        psm->action);
1343                                 if (psm->action !=
1344                                     cpu_to_le16(CMD_SUBCMD_EXIT_PS)) {
1345                                         lbs_deb_host(
1346                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1347                                         list_del(&cmdnode->list);
1348                                         spin_lock_irqsave(&priv->driver_lock, flags);
1349                                         lbs_complete_command(priv, cmdnode, 0);
1350                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1351
1352                                         ret = 0;
1353                                         goto done;
1354                                 }
1355
1356                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1357                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1358                                         lbs_deb_host(
1359                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1360                                         list_del(&cmdnode->list);
1361                                         spin_lock_irqsave(&priv->driver_lock, flags);
1362                                         lbs_complete_command(priv, cmdnode, 0);
1363                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1364                                         priv->needtowakeup = 1;
1365
1366                                         ret = 0;
1367                                         goto done;
1368                                 }
1369
1370                                 lbs_deb_host(
1371                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1372                         }
1373                 }
1374                 list_del(&cmdnode->list);
1375                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1376                             le16_to_cpu(cmd->command));
1377                 lbs_submit_command(priv, cmdnode);
1378         } else {
1379                 /*
1380                  * check if in power save mode, if yes, put the device back
1381                  * to PS mode
1382                  */
1383 #ifdef TODO
1384                 /*
1385                  * This was the old code for libertas+wext. Someone that
1386                  * understands this beast should re-code it in a sane way.
1387                  *
1388                  * I actually don't understand why this is related to WPA
1389                  * and to connection status, shouldn't powering should be
1390                  * independ of such things?
1391                  */
1392                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1393                     (priv->psstate == PS_STATE_FULL_POWER) &&
1394                     ((priv->connect_status == LBS_CONNECTED) ||
1395                     lbs_mesh_connected(priv))) {
1396                         if (priv->secinfo.WPAenabled ||
1397                             priv->secinfo.WPA2enabled) {
1398                                 /* check for valid WPA group keys */
1399                                 if (priv->wpa_mcast_key.len ||
1400                                     priv->wpa_unicast_key.len) {
1401                                         lbs_deb_host(
1402                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1403                                                " go back to PS_SLEEP");
1404                                         lbs_ps_sleep(priv, 0);
1405                                 }
1406                         } else {
1407                                 lbs_deb_host(
1408                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1409                                        "go back to PS_SLEEP");
1410                                 lbs_ps_sleep(priv, 0);
1411                         }
1412                 }
1413 #endif
1414         }
1415
1416         ret = 0;
1417 done:
1418         lbs_deb_leave(LBS_DEB_THREAD);
1419         return ret;
1420 }
1421
1422 static void lbs_send_confirmsleep(struct lbs_private *priv)
1423 {
1424         unsigned long flags;
1425         int ret;
1426
1427         lbs_deb_enter(LBS_DEB_HOST);
1428         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1429                 sizeof(confirm_sleep));
1430
1431         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1432                 sizeof(confirm_sleep));
1433         if (ret) {
1434                 lbs_pr_alert("confirm_sleep failed\n");
1435                 goto out;
1436         }
1437
1438         spin_lock_irqsave(&priv->driver_lock, flags);
1439
1440         /* We don't get a response on the sleep-confirmation */
1441         priv->dnld_sent = DNLD_RES_RECEIVED;
1442
1443         if (priv->is_host_sleep_configured) {
1444                 priv->is_host_sleep_activated = 1;
1445                 wake_up_interruptible(&priv->host_sleep_q);
1446         }
1447
1448         /* If nothing to do, go back to sleep (?) */
1449         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1450                 priv->psstate = PS_STATE_SLEEP;
1451
1452         spin_unlock_irqrestore(&priv->driver_lock, flags);
1453
1454 out:
1455         lbs_deb_leave(LBS_DEB_HOST);
1456 }
1457
1458 void lbs_ps_sleep(struct lbs_private *priv, int wait_option)
1459 {
1460         lbs_deb_enter(LBS_DEB_HOST);
1461
1462         /*
1463          * PS is currently supported only in Infrastructure mode
1464          * Remove this check if it is to be supported in IBSS mode also
1465          */
1466
1467         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1468                               CMD_SUBCMD_ENTER_PS, wait_option, 0, NULL);
1469
1470         lbs_deb_leave(LBS_DEB_HOST);
1471 }
1472
1473 /**
1474  *  @brief This function sends Exit_PS command to firmware.
1475  *
1476  *  @param priv         A pointer to struct lbs_private structure
1477  *  @param wait_option  wait response or not
1478  *  @return             n/a
1479  */
1480 void lbs_ps_wakeup(struct lbs_private *priv, int wait_option)
1481 {
1482         __le32 Localpsmode;
1483
1484         lbs_deb_enter(LBS_DEB_HOST);
1485
1486         Localpsmode = cpu_to_le32(LBS802_11POWERMODECAM);
1487
1488         lbs_prepare_and_send_command(priv, CMD_802_11_PS_MODE,
1489                               CMD_SUBCMD_EXIT_PS,
1490                               wait_option, 0, &Localpsmode);
1491
1492         lbs_deb_leave(LBS_DEB_HOST);
1493 }
1494
1495 /**
1496  *  @brief This function checks condition and prepares to
1497  *  send sleep confirm command to firmware if ok.
1498  *
1499  *  @param priv         A pointer to struct lbs_private structure
1500  *  @param psmode       Power Saving mode
1501  *  @return             n/a
1502  */
1503 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1504 {
1505         unsigned long flags =0;
1506         int allowed = 1;
1507
1508         lbs_deb_enter(LBS_DEB_HOST);
1509
1510         spin_lock_irqsave(&priv->driver_lock, flags);
1511         if (priv->dnld_sent) {
1512                 allowed = 0;
1513                 lbs_deb_host("dnld_sent was set\n");
1514         }
1515
1516         /* In-progress command? */
1517         if (priv->cur_cmd) {
1518                 allowed = 0;
1519                 lbs_deb_host("cur_cmd was set\n");
1520         }
1521
1522         /* Pending events or command responses? */
1523         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1524                 allowed = 0;
1525                 lbs_deb_host("pending events or command responses\n");
1526         }
1527         spin_unlock_irqrestore(&priv->driver_lock, flags);
1528
1529         if (allowed) {
1530                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1531                 lbs_send_confirmsleep(priv);
1532         } else {
1533                 lbs_deb_host("sleep confirm has been delayed\n");
1534         }
1535
1536         lbs_deb_leave(LBS_DEB_HOST);
1537 }
1538
1539
1540 /**
1541  * @brief Configures the transmission power control functionality.
1542  *
1543  * @param priv          A pointer to struct lbs_private structure
1544  * @param enable        Transmission power control enable
1545  * @param p0            Power level when link quality is good (dBm).
1546  * @param p1            Power level when link quality is fair (dBm).
1547  * @param p2            Power level when link quality is poor (dBm).
1548  * @param usesnr        Use Signal to Noise Ratio in TPC
1549  *
1550  * @return 0 on success
1551  */
1552 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1553                 int8_t p2, int usesnr)
1554 {
1555         struct cmd_ds_802_11_tpc_cfg cmd;
1556         int ret;
1557
1558         memset(&cmd, 0, sizeof(cmd));
1559         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1560         cmd.action = cpu_to_le16(CMD_ACT_SET);
1561         cmd.enable = !!enable;
1562         cmd.usesnr = !!usesnr;
1563         cmd.P0 = p0;
1564         cmd.P1 = p1;
1565         cmd.P2 = p2;
1566
1567         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1568
1569         return ret;
1570 }
1571
1572 /**
1573  * @brief Configures the power adaptation settings.
1574  *
1575  * @param priv          A pointer to struct lbs_private structure
1576  * @param enable        Power adaptation enable
1577  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1578  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1579  * @param p2            Power level for 48 and 54 Mbps (dBm).
1580  *
1581  * @return 0 on Success
1582  */
1583
1584 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1585                 int8_t p1, int8_t p2)
1586 {
1587         struct cmd_ds_802_11_pa_cfg cmd;
1588         int ret;
1589
1590         memset(&cmd, 0, sizeof(cmd));
1591         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1592         cmd.action = cpu_to_le16(CMD_ACT_SET);
1593         cmd.enable = !!enable;
1594         cmd.P0 = p0;
1595         cmd.P1 = p1;
1596         cmd.P2 = p2;
1597
1598         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1599
1600         return ret;
1601 }
1602
1603
1604 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1605         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1606         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1607         unsigned long callback_arg)
1608 {
1609         struct cmd_ctrl_node *cmdnode;
1610
1611         lbs_deb_enter(LBS_DEB_HOST);
1612
1613         if (priv->surpriseremoved) {
1614                 lbs_deb_host("PREP_CMD: card removed\n");
1615                 cmdnode = ERR_PTR(-ENOENT);
1616                 goto done;
1617         }
1618
1619         if (!lbs_is_cmd_allowed(priv)) {
1620                 cmdnode = ERR_PTR(-EBUSY);
1621                 goto done;
1622         }
1623
1624         cmdnode = lbs_get_cmd_ctrl_node(priv);
1625         if (cmdnode == NULL) {
1626                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1627
1628                 /* Wake up main thread to execute next command */
1629                 wake_up_interruptible(&priv->waitq);
1630                 cmdnode = ERR_PTR(-ENOBUFS);
1631                 goto done;
1632         }
1633
1634         cmdnode->callback = callback;
1635         cmdnode->callback_arg = callback_arg;
1636
1637         /* Copy the incoming command to the buffer */
1638         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1639
1640         /* Set sequence number, clean result, move to buffer */
1641         priv->seqnum++;
1642         cmdnode->cmdbuf->command = cpu_to_le16(command);
1643         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1644         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1645         cmdnode->cmdbuf->result  = 0;
1646
1647         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1648
1649         cmdnode->cmdwaitqwoken = 0;
1650         lbs_queue_cmd(priv, cmdnode);
1651         wake_up_interruptible(&priv->waitq);
1652
1653  done:
1654         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1655         return cmdnode;
1656 }
1657
1658 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1659         struct cmd_header *in_cmd, int in_cmd_size)
1660 {
1661         lbs_deb_enter(LBS_DEB_CMD);
1662         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1663                 lbs_cmd_async_callback, 0);
1664         lbs_deb_leave(LBS_DEB_CMD);
1665 }
1666
1667 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1668               struct cmd_header *in_cmd, int in_cmd_size,
1669               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1670               unsigned long callback_arg)
1671 {
1672         struct cmd_ctrl_node *cmdnode;
1673         unsigned long flags;
1674         int ret = 0;
1675
1676         lbs_deb_enter(LBS_DEB_HOST);
1677
1678         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1679                                   callback, callback_arg);
1680         if (IS_ERR(cmdnode)) {
1681                 ret = PTR_ERR(cmdnode);
1682                 goto done;
1683         }
1684
1685         might_sleep();
1686         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1687
1688         spin_lock_irqsave(&priv->driver_lock, flags);
1689         ret = cmdnode->result;
1690         if (ret)
1691                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1692                             command, ret);
1693
1694         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1695         spin_unlock_irqrestore(&priv->driver_lock, flags);
1696
1697 done:
1698         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1699         return ret;
1700 }
1701 EXPORT_SYMBOL_GPL(__lbs_cmd);