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