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  *  @request:   cfg80211 regulatory request structure
 737  *  @bands:     the device's supported bands and channels
 738  *
 739  *  returns:    0 on success, error code on failure
 740 */
 741 int lbs_set_11d_domain_info(struct lbs_private *priv,
 742                             struct regulatory_request *request,
 743                             struct ieee80211_supported_band **bands)
 744 {
 745         struct cmd_ds_802_11d_domain_info cmd;
 746         struct mrvl_ie_domain_param_set *domain = &cmd.domain;
 747         struct ieee80211_country_ie_triplet *t;
 748         enum ieee80211_band band;
 749         struct ieee80211_channel *ch;
 750         u8 num_triplet = 0;
 751         u8 num_parsed_chan = 0;
 752         u8 first_channel = 0, next_chan = 0, max_pwr = 0;
 753         u8 i, flag = 0;
 754         size_t triplet_size;
 755         int ret;
 756
 757         lbs_deb_enter(LBS_DEB_11D);
 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                     request->alpha2[0], request->alpha2[1]);
 764
 765         domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 766
 767         /* Set country code */
 768         domain->country_code[0] = request->alpha2[0];
 769         domain->country_code[1] = request->alpha2[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         lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
 852         return ret;
 853 }
 854
 855 /**
 856  *  lbs_get_reg - Read a MAC, Baseband, or RF register
 857  *
 858  *  @priv:      pointer to &struct lbs_private
 859  *  @reg:       register command, one of CMD_MAC_REG_ACCESS,
 860  *              CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 861  *  @offset:    byte offset of the register to get
 862  *  @value:     on success, the value of the register at 'offset'
 863  *
 864  *  returns:    0 on success, error code on failure
 865 */
 866 int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
 867 {
 868         struct cmd_ds_reg_access cmd;
 869         int ret = 0;
 870
 871         lbs_deb_enter(LBS_DEB_CMD);
 872
 873         BUG_ON(value == NULL);
 874
 875         memset(&cmd, 0, sizeof(cmd));
 876         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 877         cmd.action = cpu_to_le16(CMD_ACT_GET);
 878         cmd.offset = cpu_to_le16(offset);
 879
 880         if (reg != CMD_MAC_REG_ACCESS &&
 881             reg != CMD_BBP_REG_ACCESS &&
 882             reg != CMD_RF_REG_ACCESS) {
 883                 ret = -EINVAL;
 884                 goto out;
 885         }
 886
 887         ret = lbs_cmd_with_response(priv, reg, &cmd);
 888         if (!ret) {
 889                 if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 890                         *value = cmd.value.bbp_rf;
 891                 else if (reg == CMD_MAC_REG_ACCESS)
 892                         *value = le32_to_cpu(cmd.value.mac);
 893         }
 894
 895 out:
 896         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 897         return ret;
 898 }
 899
 900 /**
 901  *  lbs_set_reg - Write a MAC, Baseband, or RF register
 902  *
 903  *  @priv:      pointer to &struct lbs_private
 904  *  @reg:       register command, one of CMD_MAC_REG_ACCESS,
 905  *              CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 906  *  @offset:    byte offset of the register to set
 907  *  @value:     the value to write to the register at 'offset'
 908  *
 909  *  returns:    0 on success, error code on failure
 910 */
 911 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
 912 {
 913         struct cmd_ds_reg_access cmd;
 914         int ret = 0;
 915
 916         lbs_deb_enter(LBS_DEB_CMD);
 917
 918         memset(&cmd, 0, sizeof(cmd));
 919         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 920         cmd.action = cpu_to_le16(CMD_ACT_SET);
 921         cmd.offset = cpu_to_le16(offset);
 922
 923         if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 924                 cmd.value.bbp_rf = (u8) (value & 0xFF);
 925         else if (reg == CMD_MAC_REG_ACCESS)
 926                 cmd.value.mac = cpu_to_le32(value);
 927         else {
 928                 ret = -EINVAL;
 929                 goto out;
 930         }
 931
 932         ret = lbs_cmd_with_response(priv, reg, &cmd);
 933
 934 out:
 935         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 936         return ret;
 937 }
 938
 939 static void lbs_queue_cmd(struct lbs_private *priv,
 940                           struct cmd_ctrl_node *cmdnode)
 941 {
 942         unsigned long flags;
 943         int addtail = 1;
 944
 945         lbs_deb_enter(LBS_DEB_HOST);
 946
 947         if (!cmdnode) {
 948                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 949                 goto done;
 950         }
 951         if (!cmdnode->cmdbuf->size) {
 952                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 953                 goto done;
 954         }
 955         cmdnode->result = 0;
 956
 957         /* Exit_PS command needs to be queued in the header always. */
 958         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 959                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf;
 960
 961                 if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 962                         if (priv->psstate != PS_STATE_FULL_POWER)
 963                                 addtail = 0;
 964                 }
 965         }
 966
 967         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
 968                 addtail = 0;
 969
 970         spin_lock_irqsave(&priv->driver_lock, flags);
 971
 972         if (addtail)
 973                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 974         else
 975                 list_add(&cmdnode->list, &priv->cmdpendingq);
 976
 977         spin_unlock_irqrestore(&priv->driver_lock, flags);
 978
 979         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 980                      le16_to_cpu(cmdnode->cmdbuf->command));
 981
 982 done:
 983         lbs_deb_leave(LBS_DEB_HOST);
 984 }
 985
 986 static void lbs_submit_command(struct lbs_private *priv,
 987                                struct cmd_ctrl_node *cmdnode)
 988 {
 989         unsigned long flags;
 990         struct cmd_header *cmd;
 991         uint16_t cmdsize;
 992         uint16_t command;
 993         int timeo = 3 * HZ;
 994         int ret;
 995
 996         lbs_deb_enter(LBS_DEB_HOST);
 997
 998         cmd = cmdnode->cmdbuf;
 999
1000         spin_lock_irqsave(&priv->driver_lock, flags);
1001         priv->seqnum++;
1002         cmd->seqnum = cpu_to_le16(priv->seqnum);
1003         priv->cur_cmd = cmdnode;
1004         spin_unlock_irqrestore(&priv->driver_lock, flags);
1005
1006         cmdsize = le16_to_cpu(cmd->size);
1007         command = le16_to_cpu(cmd->command);
1008
1009         /* These commands take longer */
1010         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
1011                 timeo = 5 * HZ;
1012
1013         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
1014                      command, le16_to_cpu(cmd->seqnum), cmdsize);
1015         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
1016
1017         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
1018
1019         if (ret) {
1020                 netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
1021                             ret);
1022                 /* Let the timer kick in and retry, and potentially reset
1023                    the whole thing if the condition persists */
1024                 timeo = HZ/4;
1025         }
1026
1027         if (command == CMD_802_11_DEEP_SLEEP) {
1028                 if (priv->is_auto_deep_sleep_enabled) {
1029                         priv->wakeup_dev_required = 1;
1030                         priv->dnld_sent = 0;
1031                 }
1032                 priv->is_deep_sleep = 1;
1033                 lbs_complete_command(priv, cmdnode, 0);
1034         } else {
1035                 /* Setup the timer after transmit command */
1036                 mod_timer(&priv->command_timer, jiffies + timeo);
1037         }
1038
1039         lbs_deb_leave(LBS_DEB_HOST);
1040 }
1041
1042 /*
1043  *  This function inserts command node to cmdfreeq
1044  *  after cleans it. Requires priv->driver_lock held.
1045  */
1046 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1047                                          struct cmd_ctrl_node *cmdnode)
1048 {
1049         lbs_deb_enter(LBS_DEB_HOST);
1050
1051         if (!cmdnode)
1052                 goto out;
1053
1054         cmdnode->callback = NULL;
1055         cmdnode->callback_arg = 0;
1056
1057         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
1058
1059         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
1060  out:
1061         lbs_deb_leave(LBS_DEB_HOST);
1062 }
1063
1064 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1065         struct cmd_ctrl_node *ptempcmd)
1066 {
1067         unsigned long flags;
1068
1069         spin_lock_irqsave(&priv->driver_lock, flags);
1070         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1071         spin_unlock_irqrestore(&priv->driver_lock, flags);
1072 }
1073
1074 void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1075                             int result)
1076 {
1077         /*
1078          * Normally, commands are removed from cmdpendingq before being
1079          * submitted. However, we can arrive here on alternative codepaths
1080          * where the command is still pending. Make sure the command really
1081          * isn't part of a list at this point.
1082          */
1083         list_del_init(&cmd->list);
1084
1085         cmd->result = result;
1086         cmd->cmdwaitqwoken = 1;
1087         wake_up(&cmd->cmdwait_q);
1088
1089         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1090                 __lbs_cleanup_and_insert_cmd(priv, cmd);
1091         priv->cur_cmd = NULL;
1092         wake_up(&priv->waitq);
1093 }
1094
1095 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1096                           int result)
1097 {
1098         unsigned long flags;
1099         spin_lock_irqsave(&priv->driver_lock, flags);
1100         __lbs_complete_command(priv, cmd, result);
1101         spin_unlock_irqrestore(&priv->driver_lock, flags);
1102 }
1103
1104 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1105 {
1106         struct cmd_ds_802_11_radio_control cmd;
1107         int ret = -EINVAL;
1108
1109         lbs_deb_enter(LBS_DEB_CMD);
1110
1111         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1112         cmd.action = cpu_to_le16(CMD_ACT_SET);
1113
1114         /* Only v8 and below support setting the preamble */
1115         if (priv->fwrelease < 0x09000000) {
1116                 switch (preamble) {
1117                 case RADIO_PREAMBLE_SHORT:
1118                 case RADIO_PREAMBLE_AUTO:
1119                 case RADIO_PREAMBLE_LONG:
1120                         cmd.control = cpu_to_le16(preamble);
1121                         break;
1122                 default:
1123                         goto out;
1124                 }
1125         }
1126
1127         if (radio_on)
1128                 cmd.control |= cpu_to_le16(0x1);
1129         else {
1130                 cmd.control &= cpu_to_le16(~0x1);
1131                 priv->txpower_cur = 0;
1132         }
1133
1134         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1135                     radio_on ? "ON" : "OFF", preamble);
1136
1137         priv->radio_on = radio_on;
1138
1139         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1140
1141 out:
1142         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
1143         return ret;
1144 }
1145
1146 void lbs_set_mac_control(struct lbs_private *priv)
1147 {
1148         struct cmd_ds_mac_control cmd;
1149
1150         lbs_deb_enter(LBS_DEB_CMD);
1151
1152         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1153         cmd.action = cpu_to_le16(priv->mac_control);
1154         cmd.reserved = 0;
1155
1156         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1157
1158         lbs_deb_leave(LBS_DEB_CMD);
1159 }
1160
1161 /**
1162  *  lbs_allocate_cmd_buffer - allocates the command buffer and links
1163  *  it to command free queue
1164  *
1165  *  @priv:      A pointer to &struct lbs_private structure
1166  *
1167  *  returns:    0 for success or -1 on error
1168  */
1169 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1170 {
1171         int ret = 0;
1172         u32 bufsize;
1173         u32 i;
1174         struct cmd_ctrl_node *cmdarray;
1175
1176         lbs_deb_enter(LBS_DEB_HOST);
1177
1178         /* Allocate and initialize the command array */
1179         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1180         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1181                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1182                 ret = -1;
1183                 goto done;
1184         }
1185         priv->cmd_array = cmdarray;
1186
1187         /* Allocate and initialize each command buffer in the command array */
1188         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1189                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1190                 if (!cmdarray[i].cmdbuf) {
1191                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1192                         ret = -1;
1193                         goto done;
1194                 }
1195         }
1196
1197         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1198                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1199                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1200         }
1201         ret = 0;
1202
1203 done:
1204         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1205         return ret;
1206 }
1207
1208 /**
1209  *  lbs_free_cmd_buffer - free the command buffer
1210  *
1211  *  @priv:      A pointer to &struct lbs_private structure
1212  *
1213  *  returns:    0 for success
1214  */
1215 int lbs_free_cmd_buffer(struct lbs_private *priv)
1216 {
1217         struct cmd_ctrl_node *cmdarray;
1218         unsigned int i;
1219
1220         lbs_deb_enter(LBS_DEB_HOST);
1221
1222         /* need to check if cmd array is allocated or not */
1223         if (priv->cmd_array == NULL) {
1224                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1225                 goto done;
1226         }
1227
1228         cmdarray = priv->cmd_array;
1229
1230         /* Release shared memory buffers */
1231         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1232                 if (cmdarray[i].cmdbuf) {
1233                         kfree(cmdarray[i].cmdbuf);
1234                         cmdarray[i].cmdbuf = NULL;
1235                 }
1236         }
1237
1238         /* Release cmd_ctrl_node */
1239         if (priv->cmd_array) {
1240                 kfree(priv->cmd_array);
1241                 priv->cmd_array = NULL;
1242         }
1243
1244 done:
1245         lbs_deb_leave(LBS_DEB_HOST);
1246         return 0;
1247 }
1248
1249 /**
1250  *  lbs_get_free_cmd_node - gets a free command node if available in
1251  *  command free queue
1252  *
1253  *  @priv:      A pointer to &struct lbs_private structure
1254  *
1255  *  returns:    A pointer to &cmd_ctrl_node structure on success
1256  *              or %NULL on error
1257  */
1258 static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1259 {
1260         struct cmd_ctrl_node *tempnode;
1261         unsigned long flags;
1262
1263         lbs_deb_enter(LBS_DEB_HOST);
1264
1265         if (!priv)
1266                 return NULL;
1267
1268         spin_lock_irqsave(&priv->driver_lock, flags);
1269
1270         if (!list_empty(&priv->cmdfreeq)) {
1271                 tempnode = list_first_entry(&priv->cmdfreeq,
1272                                             struct cmd_ctrl_node, list);
1273                 list_del_init(&tempnode->list);
1274         } else {
1275                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1276                 tempnode = NULL;
1277         }
1278
1279         spin_unlock_irqrestore(&priv->driver_lock, flags);
1280
1281         lbs_deb_leave(LBS_DEB_HOST);
1282         return tempnode;
1283 }
1284
1285 /**
1286  *  lbs_execute_next_command - execute next command in command
1287  *  pending queue. Will put firmware back to PS mode if applicable.
1288  *
1289  *  @priv:      A pointer to &struct lbs_private structure
1290  *
1291  *  returns:    0 on success or -1 on error
1292  */
1293 int lbs_execute_next_command(struct lbs_private *priv)
1294 {
1295         struct cmd_ctrl_node *cmdnode = NULL;
1296         struct cmd_header *cmd;
1297         unsigned long flags;
1298         int ret = 0;
1299
1300         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1301          * only caller to us is lbs_thread() and we get even when a
1302          * data packet is received */
1303         lbs_deb_enter(LBS_DEB_THREAD);
1304
1305         spin_lock_irqsave(&priv->driver_lock, flags);
1306
1307         if (priv->cur_cmd) {
1308                 netdev_alert(priv->dev,
1309                              "EXEC_NEXT_CMD: already processing command!\n");
1310                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1311                 ret = -1;
1312                 goto done;
1313         }
1314
1315         if (!list_empty(&priv->cmdpendingq)) {
1316                 cmdnode = list_first_entry(&priv->cmdpendingq,
1317                                            struct cmd_ctrl_node, list);
1318         }
1319
1320         spin_unlock_irqrestore(&priv->driver_lock, flags);
1321
1322         if (cmdnode) {
1323                 cmd = cmdnode->cmdbuf;
1324
1325                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1326                         if ((priv->psstate == PS_STATE_SLEEP) ||
1327                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1328                                 lbs_deb_host(
1329                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1330                                        le16_to_cpu(cmd->command),
1331                                        priv->psstate);
1332                                 ret = -1;
1333                                 goto done;
1334                         }
1335                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1336                                      "0x%04x in psstate %d\n",
1337                                      le16_to_cpu(cmd->command), priv->psstate);
1338                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1339                         /*
1340                          * 1. Non-PS command:
1341                          * Queue it. set needtowakeup to TRUE if current state
1342                          * is SLEEP, otherwise call send EXIT_PS.
1343                          * 2. PS command but not EXIT_PS:
1344                          * Ignore it.
1345                          * 3. PS command EXIT_PS:
1346                          * Set needtowakeup to TRUE if current state is SLEEP,
1347                          * otherwise send this command down to firmware
1348                          * immediately.
1349                          */
1350                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1351                                 /*  Prepare to send Exit PS,
1352                                  *  this non PS command will be sent later */
1353                                 if ((priv->psstate == PS_STATE_SLEEP)
1354                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1355                                     ) {
1356                                         /* w/ new scheme, it will not reach here.
1357                                            since it is blocked in main_thread. */
1358                                         priv->needtowakeup = 1;
1359                                 } else {
1360                                         lbs_set_ps_mode(priv,
1361                                                         PS_MODE_ACTION_EXIT_PS,
1362                                                         false);
1363                                 }
1364
1365                                 ret = 0;
1366                                 goto done;
1367                         } else {
1368                                 /*
1369                                  * PS command. Ignore it if it is not Exit_PS.
1370                                  * otherwise send it down immediately.
1371                                  */
1372                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1373
1374                                 lbs_deb_host(
1375                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1376                                        psm->action);
1377                                 if (psm->action !=
1378                                     cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1379                                         lbs_deb_host(
1380                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1381                                         lbs_complete_command(priv, cmdnode, 0);
1382
1383                                         ret = 0;
1384                                         goto done;
1385                                 }
1386
1387                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1388                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1389                                         lbs_deb_host(
1390                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1391                                         lbs_complete_command(priv, cmdnode, 0);
1392                                         priv->needtowakeup = 1;
1393
1394                                         ret = 0;
1395                                         goto done;
1396                                 }
1397
1398                                 lbs_deb_host(
1399                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1400                         }
1401                 }
1402                 spin_lock_irqsave(&priv->driver_lock, flags);
1403                 list_del_init(&cmdnode->list);
1404                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1405                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1406                             le16_to_cpu(cmd->command));
1407                 lbs_submit_command(priv, cmdnode);
1408         } else {
1409                 /*
1410                  * check if in power save mode, if yes, put the device back
1411                  * to PS mode
1412                  */
1413 #ifdef TODO
1414                 /*
1415                  * This was the old code for libertas+wext. Someone that
1416                  * understands this beast should re-code it in a sane way.
1417                  *
1418                  * I actually don't understand why this is related to WPA
1419                  * and to connection status, shouldn't powering should be
1420                  * independ of such things?
1421                  */
1422                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1423                     (priv->psstate == PS_STATE_FULL_POWER) &&
1424                     ((priv->connect_status == LBS_CONNECTED) ||
1425                     lbs_mesh_connected(priv))) {
1426                         if (priv->secinfo.WPAenabled ||
1427                             priv->secinfo.WPA2enabled) {
1428                                 /* check for valid WPA group keys */
1429                                 if (priv->wpa_mcast_key.len ||
1430                                     priv->wpa_unicast_key.len) {
1431                                         lbs_deb_host(
1432                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1433                                                " go back to PS_SLEEP");
1434                                         lbs_set_ps_mode(priv,
1435                                                         PS_MODE_ACTION_ENTER_PS,
1436                                                         false);
1437                                 }
1438                         } else {
1439                                 lbs_deb_host(
1440                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1441                                        "go back to PS_SLEEP");
1442                                 lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1443                                                 false);
1444                         }
1445                 }
1446 #endif
1447         }
1448
1449         ret = 0;
1450 done:
1451         lbs_deb_leave(LBS_DEB_THREAD);
1452         return ret;
1453 }
1454
1455 static void lbs_send_confirmsleep(struct lbs_private *priv)
1456 {
1457         unsigned long flags;
1458         int ret;
1459
1460         lbs_deb_enter(LBS_DEB_HOST);
1461         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1462                 sizeof(confirm_sleep));
1463
1464         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1465                 sizeof(confirm_sleep));
1466         if (ret) {
1467                 netdev_alert(priv->dev, "confirm_sleep failed\n");
1468                 goto out;
1469         }
1470
1471         spin_lock_irqsave(&priv->driver_lock, flags);
1472
1473         /* We don't get a response on the sleep-confirmation */
1474         priv->dnld_sent = DNLD_RES_RECEIVED;
1475
1476         if (priv->is_host_sleep_configured) {
1477                 priv->is_host_sleep_activated = 1;
1478                 wake_up_interruptible(&priv->host_sleep_q);
1479         }
1480
1481         /* If nothing to do, go back to sleep (?) */
1482         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1483                 priv->psstate = PS_STATE_SLEEP;
1484
1485         spin_unlock_irqrestore(&priv->driver_lock, flags);
1486
1487 out:
1488         lbs_deb_leave(LBS_DEB_HOST);
1489 }
1490
1491 /**
1492  * lbs_ps_confirm_sleep - checks condition and prepares to
1493  * send sleep confirm command to firmware if ok
1494  *
1495  * @priv:       A pointer to &struct lbs_private structure
1496  *
1497  * returns:     n/a
1498  */
1499 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1500 {
1501         unsigned long flags =0;
1502         int allowed = 1;
1503
1504         lbs_deb_enter(LBS_DEB_HOST);
1505
1506         spin_lock_irqsave(&priv->driver_lock, flags);
1507         if (priv->dnld_sent) {
1508                 allowed = 0;
1509                 lbs_deb_host("dnld_sent was set\n");
1510         }
1511
1512         /* In-progress command? */
1513         if (priv->cur_cmd) {
1514                 allowed = 0;
1515                 lbs_deb_host("cur_cmd was set\n");
1516         }
1517
1518         /* Pending events or command responses? */
1519         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1520                 allowed = 0;
1521                 lbs_deb_host("pending events or command responses\n");
1522         }
1523         spin_unlock_irqrestore(&priv->driver_lock, flags);
1524
1525         if (allowed) {
1526                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1527                 lbs_send_confirmsleep(priv);
1528         } else {
1529                 lbs_deb_host("sleep confirm has been delayed\n");
1530         }
1531
1532         lbs_deb_leave(LBS_DEB_HOST);
1533 }
1534
1535
1536 /**
1537  * lbs_set_tpc_cfg - Configures the transmission power control functionality
1538  *
1539  * @priv:       A pointer to &struct lbs_private structure
1540  * @enable:     Transmission power control enable
1541  * @p0:         Power level when link quality is good (dBm).
1542  * @p1:         Power level when link quality is fair (dBm).
1543  * @p2:         Power level when link quality is poor (dBm).
1544  * @usesnr:     Use Signal to Noise Ratio in TPC
1545  *
1546  * returns:     0 on success
1547  */
1548 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1549                 int8_t p2, int usesnr)
1550 {
1551         struct cmd_ds_802_11_tpc_cfg cmd;
1552         int ret;
1553
1554         memset(&cmd, 0, sizeof(cmd));
1555         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1556         cmd.action = cpu_to_le16(CMD_ACT_SET);
1557         cmd.enable = !!enable;
1558         cmd.usesnr = !!usesnr;
1559         cmd.P0 = p0;
1560         cmd.P1 = p1;
1561         cmd.P2 = p2;
1562
1563         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1564
1565         return ret;
1566 }
1567
1568 /**
1569  * lbs_set_power_adapt_cfg - Configures the power adaptation settings
1570  *
1571  * @priv:       A pointer to &struct lbs_private structure
1572  * @enable:     Power adaptation enable
1573  * @p0:         Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1574  * @p1:         Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1575  * @p2:         Power level for 48 and 54 Mbps (dBm).
1576  *
1577  * returns:     0 on Success
1578  */
1579
1580 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1581                 int8_t p1, int8_t p2)
1582 {
1583         struct cmd_ds_802_11_pa_cfg cmd;
1584         int ret;
1585
1586         memset(&cmd, 0, sizeof(cmd));
1587         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1588         cmd.action = cpu_to_le16(CMD_ACT_SET);
1589         cmd.enable = !!enable;
1590         cmd.P0 = p0;
1591         cmd.P1 = p1;
1592         cmd.P2 = p2;
1593
1594         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1595
1596         return ret;
1597 }
1598
1599
1600 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1601         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1602         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1603         unsigned long callback_arg)
1604 {
1605         struct cmd_ctrl_node *cmdnode;
1606
1607         lbs_deb_enter(LBS_DEB_HOST);
1608
1609         if (priv->surpriseremoved) {
1610                 lbs_deb_host("PREP_CMD: card removed\n");
1611                 cmdnode = ERR_PTR(-ENOENT);
1612                 goto done;
1613         }
1614
1615         /* No commands are allowed in Deep Sleep until we toggle the GPIO
1616          * to wake up the card and it has signaled that it's ready.
1617          */
1618         if (!priv->is_auto_deep_sleep_enabled) {
1619                 if (priv->is_deep_sleep) {
1620                         lbs_deb_cmd("command not allowed in deep sleep\n");
1621                         cmdnode = ERR_PTR(-EBUSY);
1622                         goto done;
1623                 }
1624         }
1625
1626         cmdnode = lbs_get_free_cmd_node(priv);
1627         if (cmdnode == NULL) {
1628                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1629
1630                 /* Wake up main thread to execute next command */
1631                 wake_up(&priv->waitq);
1632                 cmdnode = ERR_PTR(-ENOBUFS);
1633                 goto done;
1634         }
1635
1636         cmdnode->callback = callback;
1637         cmdnode->callback_arg = callback_arg;
1638
1639         /* Copy the incoming command to the buffer */
1640         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1641
1642         /* Set command, clean result, move to buffer */
1643         cmdnode->cmdbuf->command = cpu_to_le16(command);
1644         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1645         cmdnode->cmdbuf->result  = 0;
1646
1647         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1648
1649         cmdnode->cmdwaitqwoken = 0;
1650         lbs_queue_cmd(priv, cmdnode);
1651         wake_up(&priv->waitq);
1652
1653  done:
1654         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1655         return cmdnode;
1656 }
1657
1658 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1659         struct cmd_header *in_cmd, int in_cmd_size)
1660 {
1661         lbs_deb_enter(LBS_DEB_CMD);
1662         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1663                 lbs_cmd_async_callback, 0);
1664         lbs_deb_leave(LBS_DEB_CMD);
1665 }
1666
1667 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1668               struct cmd_header *in_cmd, int in_cmd_size,
1669               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1670               unsigned long callback_arg)
1671 {
1672         struct cmd_ctrl_node *cmdnode;
1673         unsigned long flags;
1674         int ret = 0;
1675
1676         lbs_deb_enter(LBS_DEB_HOST);
1677
1678         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1679                                   callback, callback_arg);
1680         if (IS_ERR(cmdnode)) {
1681                 ret = PTR_ERR(cmdnode);
1682                 goto done;
1683         }
1684
1685         might_sleep();
1686
1687         /*
1688          * Be careful with signals here. A signal may be received as the system
1689          * goes into suspend or resume. We do not want this to interrupt the
1690          * command, so we perform an uninterruptible sleep.
1691          */
1692         wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1693
1694         spin_lock_irqsave(&priv->driver_lock, flags);
1695         ret = cmdnode->result;
1696         if (ret)
1697                 netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
1698                             command, ret);
1699
1700         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1701         spin_unlock_irqrestore(&priv->driver_lock, flags);
1702
1703 done:
1704         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1705         return ret;
1706 }
1707 EXPORT_SYMBOL_GPL(__lbs_cmd);