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