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