drivers/net/wireless/marvell/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         memset(&cmd, 0, sizeof(cmd));
  95         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
  96         memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
  97         ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
  98         if (ret)
  99                 goto out;
 100
 101         priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 102
 103         /* The firmware release is in an interesting format: the patch
 104          * level is in the most significant nibble ... so fix that: */
 105         priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 106         priv->fwrelease = (priv->fwrelease << 8) |
 107                 (priv->fwrelease >> 24 & 0xff);
 108
 109         /* Some firmware capabilities:
 110          * CF card    firmware 5.0.16p0:   cap 0x00000303
 111          * USB dongle firmware 5.110.17p2: cap 0x00000303
 112          */
 113         netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 114                 cmd.permanentaddr,
 115                 priv->fwrelease >> 24 & 0xff,
 116                 priv->fwrelease >> 16 & 0xff,
 117                 priv->fwrelease >>  8 & 0xff,
 118                 priv->fwrelease       & 0xff,
 119                 priv->fwcapinfo);
 120         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 121                     cmd.hwifversion, cmd.version);
 122
 123         /* Clamp region code to 8-bit since FW spec indicates that it should
 124          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 125          * returns non-zero high 8 bits here.
 126          *
 127          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 128          * need to check for this problem and handle it properly.
 129          */
 130         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 131                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 132         else
 133                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 134
 135         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 136                 /* use the region code to search for the index */
 137                 if (priv->regioncode == lbs_region_code_to_index[i])
 138                         break;
 139         }
 140
 141         /* if it's unidentified region code, use the default (USA) */
 142         if (i >= MRVDRV_MAX_REGION_CODE) {
 143                 priv->regioncode = 0x10;
 144                 netdev_info(priv->dev,
 145                             "unidentified region code; using the default (USA)\n");
 146         }
 147
 148         if (priv->current_addr[0] == 0xff)
 149                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 150
 151         if (!priv->copied_hwaddr) {
 152                 memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 153                 if (priv->mesh_dev)
 154                         memcpy(priv->mesh_dev->dev_addr,
 155                                 priv->current_addr, ETH_ALEN);
 156                 priv->copied_hwaddr = 1;
 157         }
 158
 159 out:
 160         return ret;
 161 }
 162
 163 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
 164                         struct cmd_header *resp)
 165 {
 166         if (priv->is_host_sleep_activated) {
 167                 priv->is_host_sleep_configured = 0;
 168                 if (priv->psstate == PS_STATE_FULL_POWER) {
 169                         priv->is_host_sleep_activated = 0;
 170                         wake_up_interruptible(&priv->host_sleep_q);
 171                 }
 172         } else {
 173                 priv->is_host_sleep_configured = 1;
 174         }
 175
 176         return 0;
 177 }
 178
 179 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 180                 struct wol_config *p_wol_config)
 181 {
 182         struct cmd_ds_host_sleep cmd_config;
 183         int ret;
 184
 185         /*
 186          * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
 187          * and the card will return a failure.  Since we need to be
 188          * able to reset the mask, in those cases we set a 0 mask instead.
 189          */
 190         if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
 191                 criteria = 0;
 192
 193         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 194         cmd_config.criteria = cpu_to_le32(criteria);
 195         cmd_config.gpio = priv->wol_gpio;
 196         cmd_config.gap = priv->wol_gap;
 197
 198         if (p_wol_config != NULL)
 199                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 200                                 sizeof(struct wol_config));
 201         else
 202                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 203
 204         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
 205                         le16_to_cpu(cmd_config.hdr.size),
 206                         lbs_ret_host_sleep_cfg, 0);
 207         if (!ret) {
 208                 if (p_wol_config)
 209                         memcpy((uint8_t *) p_wol_config,
 210                                         (uint8_t *)&cmd_config.wol_conf,
 211                                         sizeof(struct wol_config));
 212         } else {
 213                 netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
 214         }
 215
 216         return ret;
 217 }
 218 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 219
 220 /**
 221  *  lbs_set_ps_mode - Sets the Power Save mode
 222  *
 223  *  @priv:      A pointer to &struct lbs_private structure
 224  *  @cmd_action: The Power Save operation (PS_MODE_ACTION_ENTER_PS or
 225  *                         PS_MODE_ACTION_EXIT_PS)
 226  *  @block:     Whether to block on a response or not
 227  *
 228  *  returns:    0 on success, error on failure
 229  */
 230 int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
 231 {
 232         struct cmd_ds_802_11_ps_mode cmd;
 233         int ret = 0;
 234
 235         memset(&cmd, 0, sizeof(cmd));
 236         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 237         cmd.action = cpu_to_le16(cmd_action);
 238
 239         if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
 240                 lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
 241                 cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
 242         } else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
 243                 lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
 244         } else {
 245                 /* We don't handle CONFIRM_SLEEP here because it needs to
 246                  * be fastpathed to the firmware.
 247                  */
 248                 lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
 249                 ret = -EOPNOTSUPP;
 250                 goto out;
 251         }
 252
 253         if (block)
 254                 ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
 255         else
 256                 lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
 257
 258 out:
 259         return ret;
 260 }
 261
 262 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 263                                 struct sleep_params *sp)
 264 {
 265         struct cmd_ds_802_11_sleep_params cmd;
 266         int ret;
 267
 268         if (cmd_action == CMD_ACT_GET) {
 269                 memset(&cmd, 0, sizeof(cmd));
 270         } else {
 271                 cmd.error = cpu_to_le16(sp->sp_error);
 272                 cmd.offset = cpu_to_le16(sp->sp_offset);
 273                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 274                 cmd.calcontrol = sp->sp_calcontrol;
 275                 cmd.externalsleepclk = sp->sp_extsleepclk;
 276                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 277         }
 278         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 279         cmd.action = cpu_to_le16(cmd_action);
 280
 281         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 282
 283         if (!ret) {
 284                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 285                             "calcontrol 0x%x extsleepclk 0x%x\n",
 286                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 287                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 288                             cmd.externalsleepclk);
 289
 290                 sp->sp_error = le16_to_cpu(cmd.error);
 291                 sp->sp_offset = le16_to_cpu(cmd.offset);
 292                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 293                 sp->sp_calcontrol = cmd.calcontrol;
 294                 sp->sp_extsleepclk = cmd.externalsleepclk;
 295                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 296         }
 297
 298         return ret;
 299 }
 300
 301 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 302 {
 303         int ret = 0;
 304
 305         if (priv->is_deep_sleep) {
 306                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 307                                         !priv->is_deep_sleep, (10 * HZ))) {
 308                         netdev_err(priv->dev, "ds_awake_q: timer expired\n");
 309                         ret = -1;
 310                 }
 311         }
 312
 313         return ret;
 314 }
 315
 316 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 317 {
 318         int ret =  0;
 319
 320         if (deep_sleep) {
 321                 if (priv->is_deep_sleep != 1) {
 322                         lbs_deb_cmd("deep sleep: sleep\n");
 323                         BUG_ON(!priv->enter_deep_sleep);
 324                         ret = priv->enter_deep_sleep(priv);
 325                         if (!ret) {
 326                                 netif_stop_queue(priv->dev);
 327                                 netif_carrier_off(priv->dev);
 328                         }
 329                 } else {
 330                         netdev_err(priv->dev, "deep sleep: already enabled\n");
 331                 }
 332         } else {
 333                 if (priv->is_deep_sleep) {
 334                         lbs_deb_cmd("deep sleep: wakeup\n");
 335                         BUG_ON(!priv->exit_deep_sleep);
 336                         ret = priv->exit_deep_sleep(priv);
 337                         if (!ret) {
 338                                 ret = lbs_wait_for_ds_awake(priv);
 339                                 if (ret)
 340                                         netdev_err(priv->dev,
 341                                                    "deep sleep: wakeup failed\n");
 342                         }
 343                 }
 344         }
 345
 346         return ret;
 347 }
 348
 349 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
 350                 unsigned long dummy,
 351                 struct cmd_header *cmd)
 352 {
 353         priv->is_host_sleep_activated = 1;
 354         wake_up_interruptible(&priv->host_sleep_q);
 355
 356         return 0;
 357 }
 358
 359 int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
 360 {
 361         struct cmd_header cmd;
 362         int ret = 0;
 363         uint32_t criteria = EHS_REMOVE_WAKEUP;
 364
 365         if (host_sleep) {
 366                 if (priv->is_host_sleep_activated != 1) {
 367                         memset(&cmd, 0, sizeof(cmd));
 368                         ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
 369                                         (struct wol_config *)NULL);
 370                         if (ret) {
 371                                 netdev_info(priv->dev,
 372                                             "Host sleep configuration failed: %d\n",
 373                                             ret);
 374                                 return ret;
 375                         }
 376                         if (priv->psstate == PS_STATE_FULL_POWER) {
 377                                 ret = __lbs_cmd(priv,
 378                                                 CMD_802_11_HOST_SLEEP_ACTIVATE,
 379                                                 &cmd,
 380                                                 sizeof(cmd),
 381                                                 lbs_ret_host_sleep_activate, 0);
 382                                 if (ret)
 383                                         netdev_info(priv->dev,
 384                                                     "HOST_SLEEP_ACTIVATE failed: %d\n",
 385                                                     ret);
 386                         }
 387
 388                         if (!wait_event_interruptible_timeout(
 389                                                 priv->host_sleep_q,
 390                                                 priv->is_host_sleep_activated,
 391                                                 (10 * HZ))) {
 392                                 netdev_err(priv->dev,
 393                                            "host_sleep_q: timer expired\n");
 394                                 ret = -1;
 395                         }
 396                 } else {
 397                         netdev_err(priv->dev, "host sleep: already enabled\n");
 398                 }
 399         } else {
 400                 if (priv->is_host_sleep_activated)
 401                         ret = lbs_host_sleep_cfg(priv, criteria,
 402                                         (struct wol_config *)NULL);
 403         }
 404
 405         return ret;
 406 }
 407
 408 /**
 409  *  lbs_set_snmp_mib - Set an SNMP MIB value
 410  *
 411  *  @priv:      A pointer to &struct lbs_private structure
 412  *  @oid:       The OID to set in the firmware
 413  *  @val:       Value to set the OID to
 414  *
 415  *  returns:            0 on success, error on failure
 416  */
 417 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 418 {
 419         struct cmd_ds_802_11_snmp_mib cmd;
 420         int ret;
 421
 422         memset(&cmd, 0, sizeof (cmd));
 423         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 424         cmd.action = cpu_to_le16(CMD_ACT_SET);
 425         cmd.oid = cpu_to_le16((u16) oid);
 426
 427         switch (oid) {
 428         case SNMP_MIB_OID_BSS_TYPE:
 429                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 430                 cmd.value[0] = val;
 431                 break;
 432         case SNMP_MIB_OID_11D_ENABLE:
 433         case SNMP_MIB_OID_FRAG_THRESHOLD:
 434         case SNMP_MIB_OID_RTS_THRESHOLD:
 435         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 436         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 437                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 438                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 439                 break;
 440         default:
 441                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 442                 ret = -EINVAL;
 443                 goto out;
 444         }
 445
 446         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 447                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 448
 449         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 450
 451 out:
 452         return ret;
 453 }
 454
 455 /**
 456  *  lbs_get_snmp_mib - Get an SNMP MIB value
 457  *
 458  *  @priv:      A pointer to &struct lbs_private structure
 459  *  @oid:       The OID to retrieve from the firmware
 460  *  @out_val:   Location for the returned value
 461  *
 462  *  returns:    0 on success, error on failure
 463  */
 464 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 465 {
 466         struct cmd_ds_802_11_snmp_mib cmd;
 467         int ret;
 468
 469         memset(&cmd, 0, sizeof (cmd));
 470         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 471         cmd.action = cpu_to_le16(CMD_ACT_GET);
 472         cmd.oid = cpu_to_le16(oid);
 473
 474         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 475         if (ret)
 476                 goto out;
 477
 478         switch (le16_to_cpu(cmd.bufsize)) {
 479         case sizeof(u8):
 480                 *out_val = cmd.value[0];
 481                 break;
 482         case sizeof(u16):
 483                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 484                 break;
 485         default:
 486                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 487                             oid, le16_to_cpu(cmd.bufsize));
 488                 break;
 489         }
 490
 491 out:
 492         return ret;
 493 }
 494
 495 /**
 496  *  lbs_get_tx_power - Get the min, max, and current TX power
 497  *
 498  *  @priv:      A pointer to &struct lbs_private structure
 499  *  @curlevel:  Current power level in dBm
 500  *  @minlevel:  Minimum supported power level in dBm (optional)
 501  *  @maxlevel:  Maximum supported power level in dBm (optional)
 502  *
 503  *  returns:    0 on success, error on failure
 504  */
 505 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 506                      s16 *maxlevel)
 507 {
 508         struct cmd_ds_802_11_rf_tx_power cmd;
 509         int ret;
 510
 511         memset(&cmd, 0, sizeof(cmd));
 512         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 513         cmd.action = cpu_to_le16(CMD_ACT_GET);
 514
 515         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 516         if (ret == 0) {
 517                 *curlevel = le16_to_cpu(cmd.curlevel);
 518                 if (minlevel)
 519                         *minlevel = cmd.minlevel;
 520                 if (maxlevel)
 521                         *maxlevel = cmd.maxlevel;
 522         }
 523
 524         return ret;
 525 }
 526
 527 /**
 528  *  lbs_set_tx_power - Set the TX power
 529  *
 530  *  @priv:      A pointer to &struct lbs_private structure
 531  *  @dbm:       The desired power level in dBm
 532  *
 533  *  returns:            0 on success, error on failure
 534  */
 535 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 536 {
 537         struct cmd_ds_802_11_rf_tx_power cmd;
 538         int ret;
 539
 540         memset(&cmd, 0, sizeof(cmd));
 541         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 542         cmd.action = cpu_to_le16(CMD_ACT_SET);
 543         cmd.curlevel = cpu_to_le16(dbm);
 544
 545         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 546
 547         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 548
 549         return ret;
 550 }
 551
 552 /**
 553  *  lbs_set_monitor_mode - Enable or disable monitor mode
 554  *  (only implemented on OLPC usb8388 FW)
 555  *
 556  *  @priv:      A pointer to &struct lbs_private structure
 557  *  @enable:    1 to enable monitor mode, 0 to disable
 558  *
 559  *  returns:    0 on success, error on failure
 560  */
 561 int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
 562 {
 563         struct cmd_ds_802_11_monitor_mode cmd;
 564         int ret;
 565
 566         memset(&cmd, 0, sizeof(cmd));
 567         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 568         cmd.action = cpu_to_le16(CMD_ACT_SET);
 569         if (enable)
 570                 cmd.mode = cpu_to_le16(0x1);
 571
 572         lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
 573
 574         ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
 575         if (ret == 0) {
 576                 priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
 577                                                 ARPHRD_ETHER;
 578         }
 579
 580         return ret;
 581 }
 582
 583 /**
 584  *  lbs_get_channel - Get the radio channel
 585  *
 586  *  @priv:      A pointer to &struct lbs_private structure
 587  *
 588  *  returns:    The channel on success, error on failure
 589  */
 590 static int lbs_get_channel(struct lbs_private *priv)
 591 {
 592         struct cmd_ds_802_11_rf_channel cmd;
 593         int ret = 0;
 594
 595         memset(&cmd, 0, sizeof(cmd));
 596         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 597         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 598
 599         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 600         if (ret)
 601                 goto out;
 602
 603         ret = le16_to_cpu(cmd.channel);
 604         lbs_deb_cmd("current radio channel is %d\n", ret);
 605
 606 out:
 607         return ret;
 608 }
 609
 610 int lbs_update_channel(struct lbs_private *priv)
 611 {
 612         int ret;
 613
 614         /* the channel in f/w could be out of sync; get the current channel */
 615         ret = lbs_get_channel(priv);
 616         if (ret > 0) {
 617                 priv->channel = ret;
 618                 ret = 0;
 619         }
 620
 621         return ret;
 622 }
 623
 624 /**
 625  *  lbs_set_channel - Set the radio channel
 626  *
 627  *  @priv:      A pointer to &struct lbs_private structure
 628  *  @channel:   The desired channel, or 0 to clear a locked channel
 629  *
 630  *  returns:    0 on success, error on failure
 631  */
 632 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 633 {
 634         struct cmd_ds_802_11_rf_channel cmd;
 635 #ifdef DEBUG
 636         u8 old_channel = priv->channel;
 637 #endif
 638         int ret = 0;
 639
 640         memset(&cmd, 0, sizeof(cmd));
 641         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 642         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 643         cmd.channel = cpu_to_le16(channel);
 644
 645         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 646         if (ret)
 647                 goto out;
 648
 649         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 650         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 651                 priv->channel);
 652
 653 out:
 654         return ret;
 655 }
 656
 657 /**
 658  * lbs_get_rssi - Get current RSSI and noise floor
 659  *
 660  * @priv:       A pointer to &struct lbs_private structure
 661  * @rssi:       On successful return, signal level in mBm
 662  * @nf:         On successful return, Noise floor
 663  *
 664  * returns:     The channel on success, error on failure
 665  */
 666 int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
 667 {
 668         struct cmd_ds_802_11_rssi cmd;
 669         int ret = 0;
 670
 671         BUG_ON(rssi == NULL);
 672         BUG_ON(nf == NULL);
 673
 674         memset(&cmd, 0, sizeof(cmd));
 675         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 676         /* Average SNR over last 8 beacons */
 677         cmd.n_or_snr = cpu_to_le16(8);
 678
 679         ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
 680         if (ret == 0) {
 681                 *nf = CAL_NF(le16_to_cpu(cmd.nf));
 682                 *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
 683         }
 684
 685         return ret;
 686 }
 687
 688 /**
 689  *  lbs_set_11d_domain_info - Send regulatory and 802.11d domain information
 690  *  to the firmware
 691  *
 692  *  @priv:      pointer to &struct lbs_private
 693  *
 694  *  returns:    0 on success, error code on failure
 695 */
 696 int lbs_set_11d_domain_info(struct lbs_private *priv)
 697 {
 698         struct wiphy *wiphy = priv->wdev->wiphy;
 699         struct ieee80211_supported_band **bands = wiphy->bands;
 700         struct cmd_ds_802_11d_domain_info cmd;
 701         struct mrvl_ie_domain_param_set *domain = &cmd.domain;
 702         struct ieee80211_country_ie_triplet *t;
 703         enum nl80211_band band;
 704         struct ieee80211_channel *ch;
 705         u8 num_triplet = 0;
 706         u8 num_parsed_chan = 0;
 707         u8 first_channel = 0, next_chan = 0, max_pwr = 0;
 708         u8 i, flag = 0;
 709         size_t triplet_size;
 710         int ret = 0;
 711
 712         if (!priv->country_code[0])
 713                 goto out;
 714
 715         memset(&cmd, 0, sizeof(cmd));
 716         cmd.action = cpu_to_le16(CMD_ACT_SET);
 717
 718         lbs_deb_11d("Setting country code '%c%c'\n",
 719                     priv->country_code[0], priv->country_code[1]);
 720
 721         domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 722
 723         /* Set country code */
 724         domain->country_code[0] = priv->country_code[0];
 725         domain->country_code[1] = priv->country_code[1];
 726         domain->country_code[2] = ' ';
 727
 728         /* Now set up the channel triplets; firmware is somewhat picky here
 729          * and doesn't validate channel numbers and spans; hence it would
 730          * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
 731          * the last 3 aren't valid channels, the driver is responsible for
 732          * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
 733          * etc.
 734          */
 735         for (band = 0;
 736              (band < NUM_NL80211_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
 737              band++) {
 738
 739                 if (!bands[band])
 740                         continue;
 741
 742                 for (i = 0;
 743                      (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
 744                      i++) {
 745                         ch = &bands[band]->channels[i];
 746                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 747                                 continue;
 748
 749                         if (!flag) {
 750                                 flag = 1;
 751                                 next_chan = first_channel = (u32) ch->hw_value;
 752                                 max_pwr = ch->max_power;
 753                                 num_parsed_chan = 1;
 754                                 continue;
 755                         }
 756
 757                         if ((ch->hw_value == next_chan + 1) &&
 758                                         (ch->max_power == max_pwr)) {
 759                                 /* Consolidate adjacent channels */
 760                                 next_chan++;
 761                                 num_parsed_chan++;
 762                         } else {
 763                                 /* Add this triplet */
 764                                 lbs_deb_11d("11D triplet (%d, %d, %d)\n",
 765                                         first_channel, num_parsed_chan,
 766                                         max_pwr);
 767                                 t = &domain->triplet[num_triplet];
 768                                 t->chans.first_channel = first_channel;
 769                                 t->chans.num_channels = num_parsed_chan;
 770                                 t->chans.max_power = max_pwr;
 771                                 num_triplet++;
 772                                 flag = 0;
 773                         }
 774                 }
 775
 776                 if (flag) {
 777                         /* Add last triplet */
 778                         lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
 779                                 num_parsed_chan, max_pwr);
 780                         t = &domain->triplet[num_triplet];
 781                         t->chans.first_channel = first_channel;
 782                         t->chans.num_channels = num_parsed_chan;
 783                         t->chans.max_power = max_pwr;
 784                         num_triplet++;
 785                 }
 786         }
 787
 788         lbs_deb_11d("# triplets %d\n", num_triplet);
 789
 790         /* Set command header sizes */
 791         triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
 792         domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
 793                                         triplet_size);
 794
 795         lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
 796                         (u8 *) &cmd.domain.country_code,
 797                         le16_to_cpu(domain->header.len));
 798
 799         cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
 800                                    sizeof(cmd.action) +
 801                                    sizeof(cmd.domain.header) +
 802                                    sizeof(cmd.domain.country_code) +
 803                                    triplet_size);
 804
 805         ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
 806
 807 out:
 808         return ret;
 809 }
 810
 811 /**
 812  *  lbs_get_reg - Read a MAC, Baseband, or RF register
 813  *
 814  *  @priv:      pointer to &struct lbs_private
 815  *  @reg:       register command, one of CMD_MAC_REG_ACCESS,
 816  *              CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 817  *  @offset:    byte offset of the register to get
 818  *  @value:     on success, the value of the register at 'offset'
 819  *
 820  *  returns:    0 on success, error code on failure
 821 */
 822 int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
 823 {
 824         struct cmd_ds_reg_access cmd;
 825         int ret = 0;
 826
 827         BUG_ON(value == NULL);
 828
 829         memset(&cmd, 0, sizeof(cmd));
 830         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 831         cmd.action = cpu_to_le16(CMD_ACT_GET);
 832         cmd.offset = cpu_to_le16(offset);
 833
 834         if (reg != CMD_MAC_REG_ACCESS &&
 835             reg != CMD_BBP_REG_ACCESS &&
 836             reg != CMD_RF_REG_ACCESS) {
 837                 ret = -EINVAL;
 838                 goto out;
 839         }
 840
 841         ret = lbs_cmd_with_response(priv, reg, &cmd);
 842         if (!ret) {
 843                 if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 844                         *value = cmd.value.bbp_rf;
 845                 else if (reg == CMD_MAC_REG_ACCESS)
 846                         *value = le32_to_cpu(cmd.value.mac);
 847         }
 848
 849 out:
 850         return ret;
 851 }
 852
 853 /**
 854  *  lbs_set_reg - Write a MAC, Baseband, or RF register
 855  *
 856  *  @priv:      pointer to &struct lbs_private
 857  *  @reg:       register command, one of CMD_MAC_REG_ACCESS,
 858  *              CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 859  *  @offset:    byte offset of the register to set
 860  *  @value:     the value to write to the register at 'offset'
 861  *
 862  *  returns:    0 on success, error code on failure
 863 */
 864 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
 865 {
 866         struct cmd_ds_reg_access cmd;
 867         int ret = 0;
 868
 869         memset(&cmd, 0, sizeof(cmd));
 870         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 871         cmd.action = cpu_to_le16(CMD_ACT_SET);
 872         cmd.offset = cpu_to_le16(offset);
 873
 874         if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 875                 cmd.value.bbp_rf = (u8) (value & 0xFF);
 876         else if (reg == CMD_MAC_REG_ACCESS)
 877                 cmd.value.mac = cpu_to_le32(value);
 878         else {
 879                 ret = -EINVAL;
 880                 goto out;
 881         }
 882
 883         ret = lbs_cmd_with_response(priv, reg, &cmd);
 884
 885 out:
 886         return ret;
 887 }
 888
 889 static void lbs_queue_cmd(struct lbs_private *priv,
 890                           struct cmd_ctrl_node *cmdnode)
 891 {
 892         unsigned long flags;
 893         int addtail = 1;
 894
 895         if (!cmdnode) {
 896                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 897                 return;
 898         }
 899         if (!cmdnode->cmdbuf->size) {
 900                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 901                 return;
 902         }
 903         cmdnode->result = 0;
 904
 905         /* Exit_PS command needs to be queued in the header always. */
 906         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 907                 struct cmd_ds_802_11_ps_mode *psm = (void *)cmdnode->cmdbuf;
 908
 909                 if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 910                         if (priv->psstate != PS_STATE_FULL_POWER)
 911                                 addtail = 0;
 912                 }
 913         }
 914
 915         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
 916                 addtail = 0;
 917
 918         spin_lock_irqsave(&priv->driver_lock, flags);
 919
 920         if (addtail)
 921                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 922         else
 923                 list_add(&cmdnode->list, &priv->cmdpendingq);
 924
 925         spin_unlock_irqrestore(&priv->driver_lock, flags);
 926
 927         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 928                      le16_to_cpu(cmdnode->cmdbuf->command));
 929 }
 930
 931 static void lbs_submit_command(struct lbs_private *priv,
 932                                struct cmd_ctrl_node *cmdnode)
 933 {
 934         unsigned long flags;
 935         struct cmd_header *cmd;
 936         uint16_t cmdsize;
 937         uint16_t command;
 938         int timeo = 3 * HZ;
 939         int ret;
 940
 941         cmd = cmdnode->cmdbuf;
 942
 943         spin_lock_irqsave(&priv->driver_lock, flags);
 944         priv->seqnum++;
 945         cmd->seqnum = cpu_to_le16(priv->seqnum);
 946         priv->cur_cmd = cmdnode;
 947         spin_unlock_irqrestore(&priv->driver_lock, flags);
 948
 949         cmdsize = le16_to_cpu(cmd->size);
 950         command = le16_to_cpu(cmd->command);
 951
 952         /* These commands take longer */
 953         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 954                 timeo = 5 * HZ;
 955
 956         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 957                      command, le16_to_cpu(cmd->seqnum), cmdsize);
 958         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 959
 960         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 961
 962         if (ret) {
 963                 netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
 964                             ret);
 965                 /* Reset dnld state machine, report failure */
 966                 priv->dnld_sent = DNLD_RES_RECEIVED;
 967                 lbs_complete_command(priv, cmdnode, ret);
 968         }
 969
 970         if (command == CMD_802_11_DEEP_SLEEP) {
 971                 if (priv->is_auto_deep_sleep_enabled) {
 972                         priv->wakeup_dev_required = 1;
 973                         priv->dnld_sent = 0;
 974                 }
 975                 priv->is_deep_sleep = 1;
 976                 lbs_complete_command(priv, cmdnode, 0);
 977         } else {
 978                 /* Setup the timer after transmit command */
 979                 mod_timer(&priv->command_timer, jiffies + timeo);
 980         }
 981 }
 982
 983 /*
 984  *  This function inserts command node to cmdfreeq
 985  *  after cleans it. Requires priv->driver_lock held.
 986  */
 987 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 988                                          struct cmd_ctrl_node *cmdnode)
 989 {
 990         if (!cmdnode)
 991                 return;
 992
 993         cmdnode->callback = NULL;
 994         cmdnode->callback_arg = 0;
 995
 996         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
 997
 998         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 999 }
1000
1001 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1002         struct cmd_ctrl_node *ptempcmd)
1003 {
1004         unsigned long flags;
1005
1006         spin_lock_irqsave(&priv->driver_lock, flags);
1007         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1008         spin_unlock_irqrestore(&priv->driver_lock, flags);
1009 }
1010
1011 void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1012                             int result)
1013 {
1014         /*
1015          * Normally, commands are removed from cmdpendingq before being
1016          * submitted. However, we can arrive here on alternative codepaths
1017          * where the command is still pending. Make sure the command really
1018          * isn't part of a list at this point.
1019          */
1020         list_del_init(&cmd->list);
1021
1022         cmd->result = result;
1023         cmd->cmdwaitqwoken = 1;
1024         wake_up(&cmd->cmdwait_q);
1025
1026         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1027                 __lbs_cleanup_and_insert_cmd(priv, cmd);
1028         priv->cur_cmd = NULL;
1029         wake_up(&priv->waitq);
1030 }
1031
1032 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1033                           int result)
1034 {
1035         unsigned long flags;
1036         spin_lock_irqsave(&priv->driver_lock, flags);
1037         __lbs_complete_command(priv, cmd, result);
1038         spin_unlock_irqrestore(&priv->driver_lock, flags);
1039 }
1040
1041 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1042 {
1043         struct cmd_ds_802_11_radio_control cmd;
1044         int ret = -EINVAL;
1045
1046         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1047         cmd.action = cpu_to_le16(CMD_ACT_SET);
1048         cmd.control = 0;
1049
1050         /* Only v8 and below support setting the preamble */
1051         if (priv->fwrelease < 0x09000000) {
1052                 switch (preamble) {
1053                 case RADIO_PREAMBLE_SHORT:
1054                 case RADIO_PREAMBLE_AUTO:
1055                 case RADIO_PREAMBLE_LONG:
1056                         cmd.control = cpu_to_le16(preamble);
1057                         break;
1058                 default:
1059                         goto out;
1060                 }
1061         }
1062
1063         if (radio_on)
1064                 cmd.control |= cpu_to_le16(0x1);
1065         else {
1066                 cmd.control &= cpu_to_le16(~0x1);
1067                 priv->txpower_cur = 0;
1068         }
1069
1070         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1071                     radio_on ? "ON" : "OFF", preamble);
1072
1073         priv->radio_on = radio_on;
1074
1075         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1076
1077 out:
1078         return ret;
1079 }
1080
1081 void lbs_set_mac_control(struct lbs_private *priv)
1082 {
1083         struct cmd_ds_mac_control cmd;
1084
1085         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1086         cmd.action = cpu_to_le16(priv->mac_control);
1087         cmd.reserved = 0;
1088
1089         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1090 }
1091
1092 int lbs_set_mac_control_sync(struct lbs_private *priv)
1093 {
1094         struct cmd_ds_mac_control cmd;
1095         int ret = 0;
1096
1097         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1098         cmd.action = cpu_to_le16(priv->mac_control);
1099         cmd.reserved = 0;
1100         ret = lbs_cmd_with_response(priv, CMD_MAC_CONTROL, &cmd);
1101
1102         return ret;
1103 }
1104
1105 /**
1106  *  lbs_allocate_cmd_buffer - allocates the command buffer and links
1107  *  it to command free queue
1108  *
1109  *  @priv:      A pointer to &struct lbs_private structure
1110  *
1111  *  returns:    0 for success or -1 on error
1112  */
1113 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1114 {
1115         int ret = 0;
1116         u32 bufsize;
1117         u32 i;
1118         struct cmd_ctrl_node *cmdarray;
1119
1120         /* Allocate and initialize the command array */
1121         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1122         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1123                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1124                 ret = -1;
1125                 goto done;
1126         }
1127         priv->cmd_array = cmdarray;
1128
1129         /* Allocate and initialize each command buffer in the command array */
1130         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1131                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1132                 if (!cmdarray[i].cmdbuf) {
1133                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1134                         ret = -1;
1135                         goto done;
1136                 }
1137         }
1138
1139         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1140                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1141                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1142         }
1143         ret = 0;
1144
1145 done:
1146         return ret;
1147 }
1148
1149 /**
1150  *  lbs_free_cmd_buffer - free the command buffer
1151  *
1152  *  @priv:      A pointer to &struct lbs_private structure
1153  *
1154  *  returns:    0 for success
1155  */
1156 int lbs_free_cmd_buffer(struct lbs_private *priv)
1157 {
1158         struct cmd_ctrl_node *cmdarray;
1159         unsigned int i;
1160
1161         /* need to check if cmd array is allocated or not */
1162         if (priv->cmd_array == NULL) {
1163                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1164                 goto done;
1165         }
1166
1167         cmdarray = priv->cmd_array;
1168
1169         /* Release shared memory buffers */
1170         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1171                 if (cmdarray[i].cmdbuf) {
1172                         kfree(cmdarray[i].cmdbuf);
1173                         cmdarray[i].cmdbuf = NULL;
1174                 }
1175         }
1176
1177         /* Release cmd_ctrl_node */
1178         if (priv->cmd_array) {
1179                 kfree(priv->cmd_array);
1180                 priv->cmd_array = NULL;
1181         }
1182
1183 done:
1184         return 0;
1185 }
1186
1187 /**
1188  *  lbs_get_free_cmd_node - gets a free command node if available in
1189  *  command free queue
1190  *
1191  *  @priv:      A pointer to &struct lbs_private structure
1192  *
1193  *  returns:    A pointer to &cmd_ctrl_node structure on success
1194  *              or %NULL on error
1195  */
1196 static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1197 {
1198         struct cmd_ctrl_node *tempnode;
1199         unsigned long flags;
1200
1201         if (!priv)
1202                 return NULL;
1203
1204         spin_lock_irqsave(&priv->driver_lock, flags);
1205
1206         if (!list_empty(&priv->cmdfreeq)) {
1207                 tempnode = list_first_entry(&priv->cmdfreeq,
1208                                             struct cmd_ctrl_node, list);
1209                 list_del_init(&tempnode->list);
1210         } else {
1211                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1212                 tempnode = NULL;
1213         }
1214
1215         spin_unlock_irqrestore(&priv->driver_lock, flags);
1216
1217         return tempnode;
1218 }
1219
1220 /**
1221  *  lbs_execute_next_command - execute next command in command
1222  *  pending queue. Will put firmware back to PS mode if applicable.
1223  *
1224  *  @priv:      A pointer to &struct lbs_private structure
1225  *
1226  *  returns:    0 on success or -1 on error
1227  */
1228 int lbs_execute_next_command(struct lbs_private *priv)
1229 {
1230         struct cmd_ctrl_node *cmdnode = NULL;
1231         struct cmd_header *cmd;
1232         unsigned long flags;
1233         int ret = 0;
1234
1235         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1236          * only caller to us is lbs_thread() and we get even when a
1237          * data packet is received */
1238         spin_lock_irqsave(&priv->driver_lock, flags);
1239
1240         if (priv->cur_cmd) {
1241                 netdev_alert(priv->dev,
1242                              "EXEC_NEXT_CMD: already processing command!\n");
1243                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1244                 ret = -1;
1245                 goto done;
1246         }
1247
1248         if (!list_empty(&priv->cmdpendingq)) {
1249                 cmdnode = list_first_entry(&priv->cmdpendingq,
1250                                            struct cmd_ctrl_node, list);
1251         }
1252
1253         spin_unlock_irqrestore(&priv->driver_lock, flags);
1254
1255         if (cmdnode) {
1256                 cmd = cmdnode->cmdbuf;
1257
1258                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1259                         if ((priv->psstate == PS_STATE_SLEEP) ||
1260                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1261                                 lbs_deb_host(
1262                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1263                                        le16_to_cpu(cmd->command),
1264                                        priv->psstate);
1265                                 ret = -1;
1266                                 goto done;
1267                         }
1268                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1269                                      "0x%04x in psstate %d\n",
1270                                      le16_to_cpu(cmd->command), priv->psstate);
1271                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1272                         /*
1273                          * 1. Non-PS command:
1274                          * Queue it. set needtowakeup to TRUE if current state
1275                          * is SLEEP, otherwise call send EXIT_PS.
1276                          * 2. PS command but not EXIT_PS:
1277                          * Ignore it.
1278                          * 3. PS command EXIT_PS:
1279                          * Set needtowakeup to TRUE if current state is SLEEP,
1280                          * otherwise send this command down to firmware
1281                          * immediately.
1282                          */
1283                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1284                                 /*  Prepare to send Exit PS,
1285                                  *  this non PS command will be sent later */
1286                                 if ((priv->psstate == PS_STATE_SLEEP)
1287                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1288                                     ) {
1289                                         /* w/ new scheme, it will not reach here.
1290                                            since it is blocked in main_thread. */
1291                                         priv->needtowakeup = 1;
1292                                 } else {
1293                                         lbs_set_ps_mode(priv,
1294                                                         PS_MODE_ACTION_EXIT_PS,
1295                                                         false);
1296                                 }
1297
1298                                 ret = 0;
1299                                 goto done;
1300                         } else {
1301                                 /*
1302                                  * PS command. Ignore it if it is not Exit_PS.
1303                                  * otherwise send it down immediately.
1304                                  */
1305                                 struct cmd_ds_802_11_ps_mode *psm = (void *)cmd;
1306
1307                                 lbs_deb_host(
1308                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1309                                        psm->action);
1310                                 if (psm->action !=
1311                                     cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1312                                         lbs_deb_host(
1313                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1314                                         lbs_complete_command(priv, cmdnode, 0);
1315
1316                                         ret = 0;
1317                                         goto done;
1318                                 }
1319
1320                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1321                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1322                                         lbs_deb_host(
1323                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1324                                         lbs_complete_command(priv, cmdnode, 0);
1325                                         priv->needtowakeup = 1;
1326
1327                                         ret = 0;
1328                                         goto done;
1329                                 }
1330
1331                                 lbs_deb_host(
1332                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1333                         }
1334                 }
1335                 spin_lock_irqsave(&priv->driver_lock, flags);
1336                 list_del_init(&cmdnode->list);
1337                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1338                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1339                             le16_to_cpu(cmd->command));
1340                 lbs_submit_command(priv, cmdnode);
1341         } else {
1342                 /*
1343                  * check if in power save mode, if yes, put the device back
1344                  * to PS mode
1345                  */
1346                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1347                     (priv->psstate == PS_STATE_FULL_POWER) &&
1348                     (priv->connect_status == LBS_CONNECTED)) {
1349                         lbs_deb_host(
1350                                 "EXEC_NEXT_CMD: cmdpendingq empty, go back to PS_SLEEP");
1351                         lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1352                                         false);
1353                 }
1354         }
1355
1356         ret = 0;
1357 done:
1358         return ret;
1359 }
1360
1361 static void lbs_send_confirmsleep(struct lbs_private *priv)
1362 {
1363         unsigned long flags;
1364         int ret;
1365
1366         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1367                 sizeof(confirm_sleep));
1368
1369         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1370                 sizeof(confirm_sleep));
1371         if (ret) {
1372                 netdev_alert(priv->dev, "confirm_sleep failed\n");
1373                 return;
1374         }
1375
1376         spin_lock_irqsave(&priv->driver_lock, flags);
1377
1378         /* We don't get a response on the sleep-confirmation */
1379         priv->dnld_sent = DNLD_RES_RECEIVED;
1380
1381         if (priv->is_host_sleep_configured) {
1382                 priv->is_host_sleep_activated = 1;
1383                 wake_up_interruptible(&priv->host_sleep_q);
1384         }
1385
1386         /* If nothing to do, go back to sleep (?) */
1387         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1388                 priv->psstate = PS_STATE_SLEEP;
1389
1390         spin_unlock_irqrestore(&priv->driver_lock, flags);
1391 }
1392
1393 /**
1394  * lbs_ps_confirm_sleep - checks condition and prepares to
1395  * send sleep confirm command to firmware if ok
1396  *
1397  * @priv:       A pointer to &struct lbs_private structure
1398  *
1399  * returns:     n/a
1400  */
1401 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1402 {
1403         unsigned long flags =0;
1404         int allowed = 1;
1405
1406         spin_lock_irqsave(&priv->driver_lock, flags);
1407         if (priv->dnld_sent) {
1408                 allowed = 0;
1409                 lbs_deb_host("dnld_sent was set\n");
1410         }
1411
1412         /* In-progress command? */
1413         if (priv->cur_cmd) {
1414                 allowed = 0;
1415                 lbs_deb_host("cur_cmd was set\n");
1416         }
1417
1418         /* Pending events or command responses? */
1419         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1420                 allowed = 0;
1421                 lbs_deb_host("pending events or command responses\n");
1422         }
1423         spin_unlock_irqrestore(&priv->driver_lock, flags);
1424
1425         if (allowed) {
1426                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1427                 lbs_send_confirmsleep(priv);
1428         } else {
1429                 lbs_deb_host("sleep confirm has been delayed\n");
1430         }
1431 }
1432
1433
1434 /**
1435  * lbs_set_tpc_cfg - Configures the transmission power control functionality
1436  *
1437  * @priv:       A pointer to &struct lbs_private structure
1438  * @enable:     Transmission power control enable
1439  * @p0:         Power level when link quality is good (dBm).
1440  * @p1:         Power level when link quality is fair (dBm).
1441  * @p2:         Power level when link quality is poor (dBm).
1442  * @usesnr:     Use Signal to Noise Ratio in TPC
1443  *
1444  * returns:     0 on success
1445  */
1446 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1447                 int8_t p2, int usesnr)
1448 {
1449         struct cmd_ds_802_11_tpc_cfg cmd;
1450         int ret;
1451
1452         memset(&cmd, 0, sizeof(cmd));
1453         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1454         cmd.action = cpu_to_le16(CMD_ACT_SET);
1455         cmd.enable = !!enable;
1456         cmd.usesnr = !!usesnr;
1457         cmd.P0 = p0;
1458         cmd.P1 = p1;
1459         cmd.P2 = p2;
1460
1461         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1462
1463         return ret;
1464 }
1465
1466 /**
1467  * lbs_set_power_adapt_cfg - Configures the power adaptation settings
1468  *
1469  * @priv:       A pointer to &struct lbs_private structure
1470  * @enable:     Power adaptation enable
1471  * @p0:         Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1472  * @p1:         Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1473  * @p2:         Power level for 48 and 54 Mbps (dBm).
1474  *
1475  * returns:     0 on Success
1476  */
1477
1478 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1479                 int8_t p1, int8_t p2)
1480 {
1481         struct cmd_ds_802_11_pa_cfg cmd;
1482         int ret;
1483
1484         memset(&cmd, 0, sizeof(cmd));
1485         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1486         cmd.action = cpu_to_le16(CMD_ACT_SET);
1487         cmd.enable = !!enable;
1488         cmd.P0 = p0;
1489         cmd.P1 = p1;
1490         cmd.P2 = p2;
1491
1492         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1493
1494         return ret;
1495 }
1496
1497
1498 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1499         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1500         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1501         unsigned long callback_arg)
1502 {
1503         struct cmd_ctrl_node *cmdnode;
1504
1505         if (priv->surpriseremoved) {
1506                 lbs_deb_host("PREP_CMD: card removed\n");
1507                 cmdnode = ERR_PTR(-ENOENT);
1508                 goto done;
1509         }
1510
1511         /* No commands are allowed in Deep Sleep until we toggle the GPIO
1512          * to wake up the card and it has signaled that it's ready.
1513          */
1514         if (!priv->is_auto_deep_sleep_enabled) {
1515                 if (priv->is_deep_sleep) {
1516                         lbs_deb_cmd("command not allowed in deep sleep\n");
1517                         cmdnode = ERR_PTR(-EBUSY);
1518                         goto done;
1519                 }
1520         }
1521
1522         cmdnode = lbs_get_free_cmd_node(priv);
1523         if (cmdnode == NULL) {
1524                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1525
1526                 /* Wake up main thread to execute next command */
1527                 wake_up(&priv->waitq);
1528                 cmdnode = ERR_PTR(-ENOBUFS);
1529                 goto done;
1530         }
1531
1532         cmdnode->callback = callback;
1533         cmdnode->callback_arg = callback_arg;
1534
1535         /* Copy the incoming command to the buffer */
1536         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1537
1538         /* Set command, clean result, move to buffer */
1539         cmdnode->cmdbuf->command = cpu_to_le16(command);
1540         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1541         cmdnode->cmdbuf->result  = 0;
1542
1543         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1544
1545         cmdnode->cmdwaitqwoken = 0;
1546         lbs_queue_cmd(priv, cmdnode);
1547         wake_up(&priv->waitq);
1548
1549  done:
1550         return cmdnode;
1551 }
1552
1553 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1554         struct cmd_header *in_cmd, int in_cmd_size)
1555 {
1556         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1557                 lbs_cmd_async_callback, 0);
1558 }
1559
1560 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1561               struct cmd_header *in_cmd, int in_cmd_size,
1562               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1563               unsigned long callback_arg)
1564 {
1565         struct cmd_ctrl_node *cmdnode;
1566         unsigned long flags;
1567         int ret = 0;
1568
1569         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1570                                   callback, callback_arg);
1571         if (IS_ERR(cmdnode)) {
1572                 ret = PTR_ERR(cmdnode);
1573                 goto done;
1574         }
1575
1576         might_sleep();
1577
1578         /*
1579          * Be careful with signals here. A signal may be received as the system
1580          * goes into suspend or resume. We do not want this to interrupt the
1581          * command, so we perform an uninterruptible sleep.
1582          */
1583         wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1584
1585         spin_lock_irqsave(&priv->driver_lock, flags);
1586         ret = cmdnode->result;
1587         if (ret)
1588                 netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
1589                             command, ret);
1590
1591         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1592         spin_unlock_irqrestore(&priv->driver_lock, flags);
1593
1594 done:
1595         return ret;
1596 }
1597 EXPORT_SYMBOL_GPL(__lbs_cmd);