drivers/net/wireless/libertas/cmd.c

   1 /**
   2   * This file contains the handling of command.
   3   * It prepares command and sends it to firmware when it is ready.
   4   */
   5
   6 #include <linux/kfifo.h>
   7 #include <linux/sched.h>
   8 #include <linux/slab.h>
   9 #include <linux/if_arp.h>
  10
  11 #include "decl.h"
  12 #include "cfg.h"
  13 #include "cmd.h"
  14
  15 #define CAL_NF(nf)              ((s32)(-(s32)(nf)))
  16 #define CAL_RSSI(snr, nf)       ((s32)((s32)(snr) + CAL_NF(nf)))
  17
  18 /**
  19  *  @brief Simple callback that copies response back into command
  20  *
  21  *  @param priv         A pointer to struct lbs_private structure
  22  *  @param extra        A pointer to the original command structure for which
  23  *                      'resp' is a response
  24  *  @param resp         A pointer to the command response
  25  *
  26  *  @return             0 on success, error on failure
  27  */
  28 int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  29                      struct cmd_header *resp)
  30 {
  31         struct cmd_header *buf = (void *)extra;
  32         uint16_t copy_len;
  33
  34         copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  35         memcpy(buf, resp, copy_len);
  36         return 0;
  37 }
  38 EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  39
  40 /**
  41  *  @brief Simple callback that ignores the result. Use this if
  42  *  you just want to send a command to the hardware, but don't
  43  *  care for the result.
  44  *
  45  *  @param priv         ignored
  46  *  @param extra        ignored
  47  *  @param resp         ignored
  48  *
  49  *  @return             0 for success
  50  */
  51 static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  52                      struct cmd_header *resp)
  53 {
  54         return 0;
  55 }
  56
  57
  58 /**
  59  *  @brief Checks whether a command is allowed in Power Save mode
  60  *
  61  *  @param command the command ID
  62  *  @return        1 if allowed, 0 if not allowed
  63  */
  64 static u8 is_command_allowed_in_ps(u16 cmd)
  65 {
  66         switch (cmd) {
  67         case CMD_802_11_RSSI:
  68                 return 1;
  69         case CMD_802_11_HOST_SLEEP_CFG:
  70                 return 1;
  71         default:
  72                 break;
  73         }
  74         return 0;
  75 }
  76
  77 /**
  78  *  @brief Updates the hardware details like MAC address and regulatory region
  79  *
  80  *  @param priv         A pointer to struct lbs_private structure
  81  *
  82  *  @return             0 on success, error on failure
  83  */
  84 int lbs_update_hw_spec(struct lbs_private *priv)
  85 {
  86         struct cmd_ds_get_hw_spec cmd;
  87         int ret = -1;
  88         u32 i;
  89
  90         lbs_deb_enter(LBS_DEB_CMD);
  91
  92         memset(&cmd, 0, sizeof(cmd));
  93         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
  94         memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
  95         ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
  96         if (ret)
  97                 goto out;
  98
  99         priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 100
 101         /* The firmware release is in an interesting format: the patch
 102          * level is in the most significant nibble ... so fix that: */
 103         priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 104         priv->fwrelease = (priv->fwrelease << 8) |
 105                 (priv->fwrelease >> 24 & 0xff);
 106
 107         /* Some firmware capabilities:
 108          * CF card    firmware 5.0.16p0:   cap 0x00000303
 109          * USB dongle firmware 5.110.17p2: cap 0x00000303
 110          */
 111         lbs_pr_info("%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 112                 cmd.permanentaddr,
 113                 priv->fwrelease >> 24 & 0xff,
 114                 priv->fwrelease >> 16 & 0xff,
 115                 priv->fwrelease >>  8 & 0xff,
 116                 priv->fwrelease       & 0xff,
 117                 priv->fwcapinfo);
 118         lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 119                     cmd.hwifversion, cmd.version);
 120
 121         /* Clamp region code to 8-bit since FW spec indicates that it should
 122          * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 123          * returns non-zero high 8 bits here.
 124          *
 125          * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 126          * need to check for this problem and handle it properly.
 127          */
 128         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 129                 priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 130         else
 131                 priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 132
 133         for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 134                 /* use the region code to search for the index */
 135                 if (priv->regioncode == lbs_region_code_to_index[i])
 136                         break;
 137         }
 138
 139         /* if it's unidentified region code, use the default (USA) */
 140         if (i >= MRVDRV_MAX_REGION_CODE) {
 141                 priv->regioncode = 0x10;
 142                 lbs_pr_info("unidentified region code; using the default (USA)\n");
 143         }
 144
 145         if (priv->current_addr[0] == 0xff)
 146                 memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 147
 148         memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 149         if (priv->mesh_dev)
 150                 memcpy(priv->mesh_dev->dev_addr, priv->current_addr, ETH_ALEN);
 151
 152 out:
 153         lbs_deb_leave(LBS_DEB_CMD);
 154         return ret;
 155 }
 156
 157 static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
 158                         struct cmd_header *resp)
 159 {
 160         lbs_deb_enter(LBS_DEB_CMD);
 161         if (priv->is_host_sleep_activated) {
 162                 priv->is_host_sleep_configured = 0;
 163                 if (priv->psstate == PS_STATE_FULL_POWER) {
 164                         priv->is_host_sleep_activated = 0;
 165                         wake_up_interruptible(&priv->host_sleep_q);
 166                 }
 167         } else {
 168                 priv->is_host_sleep_configured = 1;
 169         }
 170         lbs_deb_leave(LBS_DEB_CMD);
 171         return 0;
 172 }
 173
 174 int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 175                 struct wol_config *p_wol_config)
 176 {
 177         struct cmd_ds_host_sleep cmd_config;
 178         int ret;
 179
 180         cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 181         cmd_config.criteria = cpu_to_le32(criteria);
 182         cmd_config.gpio = priv->wol_gpio;
 183         cmd_config.gap = priv->wol_gap;
 184
 185         if (p_wol_config != NULL)
 186                 memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 187                                 sizeof(struct wol_config));
 188         else
 189                 cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 190
 191         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
 192                         le16_to_cpu(cmd_config.hdr.size),
 193                         lbs_ret_host_sleep_cfg, 0);
 194         if (!ret) {
 195                 if (p_wol_config)
 196                         memcpy((uint8_t *) p_wol_config,
 197                                         (uint8_t *)&cmd_config.wol_conf,
 198                                         sizeof(struct wol_config));
 199         } else {
 200                 lbs_pr_info("HOST_SLEEP_CFG failed %d\n", ret);
 201         }
 202
 203         return ret;
 204 }
 205 EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 206
 207 /**
 208  *  @brief Sets the Power Save mode
 209  *
 210  *  @param priv         A pointer to struct lbs_private structure
 211  *  @param cmd_action   The Power Save operation (PS_MODE_ACTION_ENTER_PS or
 212  *                         PS_MODE_ACTION_EXIT_PS)
 213  *  @param block        Whether to block on a response or not
 214  *
 215  *  @return             0 on success, error on failure
 216  */
 217 int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
 218 {
 219         struct cmd_ds_802_11_ps_mode cmd;
 220         int ret = 0;
 221
 222         lbs_deb_enter(LBS_DEB_CMD);
 223
 224         memset(&cmd, 0, sizeof(cmd));
 225         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 226         cmd.action = cpu_to_le16(cmd_action);
 227
 228         if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
 229                 lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
 230                 cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
 231         } else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
 232                 lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
 233         } else {
 234                 /* We don't handle CONFIRM_SLEEP here because it needs to
 235                  * be fastpathed to the firmware.
 236                  */
 237                 lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
 238                 ret = -EOPNOTSUPP;
 239                 goto out;
 240         }
 241
 242         if (block)
 243                 ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
 244         else
 245                 lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
 246
 247 out:
 248         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 249         return ret;
 250 }
 251
 252 int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 253                                 struct sleep_params *sp)
 254 {
 255         struct cmd_ds_802_11_sleep_params cmd;
 256         int ret;
 257
 258         lbs_deb_enter(LBS_DEB_CMD);
 259
 260         if (cmd_action == CMD_ACT_GET) {
 261                 memset(&cmd, 0, sizeof(cmd));
 262         } else {
 263                 cmd.error = cpu_to_le16(sp->sp_error);
 264                 cmd.offset = cpu_to_le16(sp->sp_offset);
 265                 cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 266                 cmd.calcontrol = sp->sp_calcontrol;
 267                 cmd.externalsleepclk = sp->sp_extsleepclk;
 268                 cmd.reserved = cpu_to_le16(sp->sp_reserved);
 269         }
 270         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 271         cmd.action = cpu_to_le16(cmd_action);
 272
 273         ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 274
 275         if (!ret) {
 276                 lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 277                             "calcontrol 0x%x extsleepclk 0x%x\n",
 278                             le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 279                             le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 280                             cmd.externalsleepclk);
 281
 282                 sp->sp_error = le16_to_cpu(cmd.error);
 283                 sp->sp_offset = le16_to_cpu(cmd.offset);
 284                 sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 285                 sp->sp_calcontrol = cmd.calcontrol;
 286                 sp->sp_extsleepclk = cmd.externalsleepclk;
 287                 sp->sp_reserved = le16_to_cpu(cmd.reserved);
 288         }
 289
 290         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 291         return 0;
 292 }
 293
 294 static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 295 {
 296         int ret = 0;
 297
 298         lbs_deb_enter(LBS_DEB_CMD);
 299
 300         if (priv->is_deep_sleep) {
 301                 if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 302                                         !priv->is_deep_sleep, (10 * HZ))) {
 303                         lbs_pr_err("ds_awake_q: timer expired\n");
 304                         ret = -1;
 305                 }
 306         }
 307
 308         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 309         return ret;
 310 }
 311
 312 int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 313 {
 314         int ret =  0;
 315
 316         lbs_deb_enter(LBS_DEB_CMD);
 317
 318         if (deep_sleep) {
 319                 if (priv->is_deep_sleep != 1) {
 320                         lbs_deb_cmd("deep sleep: sleep\n");
 321                         BUG_ON(!priv->enter_deep_sleep);
 322                         ret = priv->enter_deep_sleep(priv);
 323                         if (!ret) {
 324                                 netif_stop_queue(priv->dev);
 325                                 netif_carrier_off(priv->dev);
 326                         }
 327                 } else {
 328                         lbs_pr_err("deep sleep: already enabled\n");
 329                 }
 330         } else {
 331                 if (priv->is_deep_sleep) {
 332                         lbs_deb_cmd("deep sleep: wakeup\n");
 333                         BUG_ON(!priv->exit_deep_sleep);
 334                         ret = priv->exit_deep_sleep(priv);
 335                         if (!ret) {
 336                                 ret = lbs_wait_for_ds_awake(priv);
 337                                 if (ret)
 338                                         lbs_pr_err("deep sleep: wakeup"
 339                                                         "failed\n");
 340                         }
 341                 }
 342         }
 343
 344         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 345         return ret;
 346 }
 347
 348 static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
 349                 unsigned long dummy,
 350                 struct cmd_header *cmd)
 351 {
 352         lbs_deb_enter(LBS_DEB_FW);
 353         priv->is_host_sleep_activated = 1;
 354         wake_up_interruptible(&priv->host_sleep_q);
 355         lbs_deb_leave(LBS_DEB_FW);
 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         lbs_deb_enter(LBS_DEB_CMD);
 366
 367         if (host_sleep) {
 368                 if (priv->is_host_sleep_activated != 1) {
 369                         memset(&cmd, 0, sizeof(cmd));
 370                         ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
 371                                         (struct wol_config *)NULL);
 372                         if (ret) {
 373                                 lbs_pr_info("Host sleep configuration failed: "
 374                                                 "%d\n", ret);
 375                                 return ret;
 376                         }
 377                         if (priv->psstate == PS_STATE_FULL_POWER) {
 378                                 ret = __lbs_cmd(priv,
 379                                                 CMD_802_11_HOST_SLEEP_ACTIVATE,
 380                                                 &cmd,
 381                                                 sizeof(cmd),
 382                                                 lbs_ret_host_sleep_activate, 0);
 383                                 if (ret)
 384                                         lbs_pr_info("HOST_SLEEP_ACTIVATE "
 385                                                         "failed: %d\n", ret);
 386                         }
 387
 388                         if (!wait_event_interruptible_timeout(
 389                                                 priv->host_sleep_q,
 390                                                 priv->is_host_sleep_activated,
 391                                                 (10 * HZ))) {
 392                                 lbs_pr_err("host_sleep_q: timer expired\n");
 393                                 ret = -1;
 394                         }
 395                 } else {
 396                         lbs_pr_err("host sleep: already enabled\n");
 397                 }
 398         } else {
 399                 if (priv->is_host_sleep_activated)
 400                         ret = lbs_host_sleep_cfg(priv, criteria,
 401                                         (struct wol_config *)NULL);
 402         }
 403
 404         return ret;
 405 }
 406
 407 /**
 408  *  @brief Set an SNMP MIB value
 409  *
 410  *  @param priv         A pointer to struct lbs_private structure
 411  *  @param oid          The OID to set in the firmware
 412  *  @param val          Value to set the OID to
 413  *
 414  *  @return             0 on success, error on failure
 415  */
 416 int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 417 {
 418         struct cmd_ds_802_11_snmp_mib cmd;
 419         int ret;
 420
 421         lbs_deb_enter(LBS_DEB_CMD);
 422
 423         memset(&cmd, 0, sizeof (cmd));
 424         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 425         cmd.action = cpu_to_le16(CMD_ACT_SET);
 426         cmd.oid = cpu_to_le16((u16) oid);
 427
 428         switch (oid) {
 429         case SNMP_MIB_OID_BSS_TYPE:
 430                 cmd.bufsize = cpu_to_le16(sizeof(u8));
 431                 cmd.value[0] = val;
 432                 break;
 433         case SNMP_MIB_OID_11D_ENABLE:
 434         case SNMP_MIB_OID_FRAG_THRESHOLD:
 435         case SNMP_MIB_OID_RTS_THRESHOLD:
 436         case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 437         case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 438                 cmd.bufsize = cpu_to_le16(sizeof(u16));
 439                 *((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 440                 break;
 441         default:
 442                 lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 443                 ret = -EINVAL;
 444                 goto out;
 445         }
 446
 447         lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 448                     le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 449
 450         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 451
 452 out:
 453         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 454         return ret;
 455 }
 456
 457 /**
 458  *  @brief Get an SNMP MIB value
 459  *
 460  *  @param priv         A pointer to struct lbs_private structure
 461  *  @param oid          The OID to retrieve from the firmware
 462  *  @param out_val      Location for the returned value
 463  *
 464  *  @return             0 on success, error on failure
 465  */
 466 int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 467 {
 468         struct cmd_ds_802_11_snmp_mib cmd;
 469         int ret;
 470
 471         lbs_deb_enter(LBS_DEB_CMD);
 472
 473         memset(&cmd, 0, sizeof (cmd));
 474         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 475         cmd.action = cpu_to_le16(CMD_ACT_GET);
 476         cmd.oid = cpu_to_le16(oid);
 477
 478         ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 479         if (ret)
 480                 goto out;
 481
 482         switch (le16_to_cpu(cmd.bufsize)) {
 483         case sizeof(u8):
 484                 *out_val = cmd.value[0];
 485                 break;
 486         case sizeof(u16):
 487                 *out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 488                 break;
 489         default:
 490                 lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 491                             oid, le16_to_cpu(cmd.bufsize));
 492                 break;
 493         }
 494
 495 out:
 496         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 497         return ret;
 498 }
 499
 500 /**
 501  *  @brief Get the min, max, and current TX power
 502  *
 503  *  @param priv         A pointer to struct lbs_private structure
 504  *  @param curlevel     Current power level in dBm
 505  *  @param minlevel     Minimum supported power level in dBm (optional)
 506  *  @param maxlevel     Maximum supported power level in dBm (optional)
 507  *
 508  *  @return             0 on success, error on failure
 509  */
 510 int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 511                      s16 *maxlevel)
 512 {
 513         struct cmd_ds_802_11_rf_tx_power cmd;
 514         int ret;
 515
 516         lbs_deb_enter(LBS_DEB_CMD);
 517
 518         memset(&cmd, 0, sizeof(cmd));
 519         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 520         cmd.action = cpu_to_le16(CMD_ACT_GET);
 521
 522         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 523         if (ret == 0) {
 524                 *curlevel = le16_to_cpu(cmd.curlevel);
 525                 if (minlevel)
 526                         *minlevel = cmd.minlevel;
 527                 if (maxlevel)
 528                         *maxlevel = cmd.maxlevel;
 529         }
 530
 531         lbs_deb_leave(LBS_DEB_CMD);
 532         return ret;
 533 }
 534
 535 /**
 536  *  @brief Set the TX power
 537  *
 538  *  @param priv         A pointer to struct lbs_private structure
 539  *  @param dbm          The desired power level in dBm
 540  *
 541  *  @return             0 on success, error on failure
 542  */
 543 int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 544 {
 545         struct cmd_ds_802_11_rf_tx_power cmd;
 546         int ret;
 547
 548         lbs_deb_enter(LBS_DEB_CMD);
 549
 550         memset(&cmd, 0, sizeof(cmd));
 551         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 552         cmd.action = cpu_to_le16(CMD_ACT_SET);
 553         cmd.curlevel = cpu_to_le16(dbm);
 554
 555         lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 556
 557         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 558
 559         lbs_deb_leave(LBS_DEB_CMD);
 560         return ret;
 561 }
 562
 563 /**
 564  *  @brief Enable or disable monitor mode (only implemented on OLPC usb8388 FW)
 565  *
 566  *  @param priv        A pointer to struct lbs_private structure
 567  *  @param enable      1 to enable monitor mode, 0 to disable
 568  *
 569  *  @return            0 on success, error on failure
 570  */
 571 int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
 572 {
 573         struct cmd_ds_802_11_monitor_mode cmd;
 574         int ret;
 575
 576         memset(&cmd, 0, sizeof(cmd));
 577         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 578         cmd.action = cpu_to_le16(CMD_ACT_SET);
 579         if (enable)
 580                 cmd.mode = cpu_to_le16(0x1);
 581
 582         lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
 583
 584         ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
 585         if (ret == 0) {
 586                 priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
 587                                                 ARPHRD_ETHER;
 588         }
 589
 590         lbs_deb_leave(LBS_DEB_CMD);
 591         return ret;
 592 }
 593
 594 /**
 595  *  @brief Get the radio channel
 596  *
 597  *  @param priv         A pointer to struct lbs_private structure
 598  *
 599  *  @return             The channel on success, error on failure
 600  */
 601 static int lbs_get_channel(struct lbs_private *priv)
 602 {
 603         struct cmd_ds_802_11_rf_channel cmd;
 604         int ret = 0;
 605
 606         lbs_deb_enter(LBS_DEB_CMD);
 607
 608         memset(&cmd, 0, sizeof(cmd));
 609         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 610         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 611
 612         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 613         if (ret)
 614                 goto out;
 615
 616         ret = le16_to_cpu(cmd.channel);
 617         lbs_deb_cmd("current radio channel is %d\n", ret);
 618
 619 out:
 620         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 621         return ret;
 622 }
 623
 624 int lbs_update_channel(struct lbs_private *priv)
 625 {
 626         int ret;
 627
 628         /* the channel in f/w could be out of sync; get the current channel */
 629         lbs_deb_enter(LBS_DEB_ASSOC);
 630
 631         ret = lbs_get_channel(priv);
 632         if (ret > 0) {
 633                 priv->channel = ret;
 634                 ret = 0;
 635         }
 636         lbs_deb_leave_args(LBS_DEB_ASSOC, "ret %d", ret);
 637         return ret;
 638 }
 639
 640 /**
 641  *  @brief Set the radio channel
 642  *
 643  *  @param priv         A pointer to struct lbs_private structure
 644  *  @param channel      The desired channel, or 0 to clear a locked channel
 645  *
 646  *  @return             0 on success, error on failure
 647  */
 648 int lbs_set_channel(struct lbs_private *priv, u8 channel)
 649 {
 650         struct cmd_ds_802_11_rf_channel cmd;
 651 #ifdef DEBUG
 652         u8 old_channel = priv->channel;
 653 #endif
 654         int ret = 0;
 655
 656         lbs_deb_enter(LBS_DEB_CMD);
 657
 658         memset(&cmd, 0, sizeof(cmd));
 659         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 660         cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 661         cmd.channel = cpu_to_le16(channel);
 662
 663         ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 664         if (ret)
 665                 goto out;
 666
 667         priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 668         lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 669                 priv->channel);
 670
 671 out:
 672         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 673         return ret;
 674 }
 675
 676 /**
 677  *  @brief Get current RSSI and noise floor
 678  *
 679  *  @param priv         A pointer to struct lbs_private structure
 680  *  @param rssi         On successful return, signal level in mBm
 681  *
 682  *  @return             The channel on success, error on failure
 683  */
 684 int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
 685 {
 686         struct cmd_ds_802_11_rssi cmd;
 687         int ret = 0;
 688
 689         lbs_deb_enter(LBS_DEB_CMD);
 690
 691         BUG_ON(rssi == NULL);
 692         BUG_ON(nf == NULL);
 693
 694         memset(&cmd, 0, sizeof(cmd));
 695         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 696         /* Average SNR over last 8 beacons */
 697         cmd.n_or_snr = cpu_to_le16(8);
 698
 699         ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
 700         if (ret == 0) {
 701                 *nf = CAL_NF(le16_to_cpu(cmd.nf));
 702                 *rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
 703         }
 704
 705         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 706         return ret;
 707 }
 708
 709 /**
 710  *  @brief Send regulatory and 802.11d domain information to the firmware
 711  *
 712  *  @param priv         pointer to struct lbs_private
 713  *  @param request      cfg80211 regulatory request structure
 714  *  @param bands        the device's supported bands and channels
 715  *
 716  *  @return             0 on success, error code on failure
 717 */
 718 int lbs_set_11d_domain_info(struct lbs_private *priv,
 719                             struct regulatory_request *request,
 720                             struct ieee80211_supported_band **bands)
 721 {
 722         struct cmd_ds_802_11d_domain_info cmd;
 723         struct mrvl_ie_domain_param_set *domain = &cmd.domain;
 724         struct ieee80211_country_ie_triplet *t;
 725         enum ieee80211_band band;
 726         struct ieee80211_channel *ch;
 727         u8 num_triplet = 0;
 728         u8 num_parsed_chan = 0;
 729         u8 first_channel = 0, next_chan = 0, max_pwr = 0;
 730         u8 i, flag = 0;
 731         size_t triplet_size;
 732         int ret;
 733
 734         lbs_deb_enter(LBS_DEB_11D);
 735
 736         memset(&cmd, 0, sizeof(cmd));
 737         cmd.action = cpu_to_le16(CMD_ACT_SET);
 738
 739         lbs_deb_11d("Setting country code '%c%c'\n",
 740                     request->alpha2[0], request->alpha2[1]);
 741
 742         domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 743
 744         /* Set country code */
 745         domain->country_code[0] = request->alpha2[0];
 746         domain->country_code[1] = request->alpha2[1];
 747         domain->country_code[2] = ' ';
 748
 749         /* Now set up the channel triplets; firmware is somewhat picky here
 750          * and doesn't validate channel numbers and spans; hence it would
 751          * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
 752          * the last 3 aren't valid channels, the driver is responsible for
 753          * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
 754          * etc.
 755          */
 756         for (band = 0;
 757              (band < IEEE80211_NUM_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
 758              band++) {
 759
 760                 if (!bands[band])
 761                         continue;
 762
 763                 for (i = 0;
 764                      (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
 765                      i++) {
 766                         ch = &bands[band]->channels[i];
 767                         if (ch->flags & IEEE80211_CHAN_DISABLED)
 768                                 continue;
 769
 770                         if (!flag) {
 771                                 flag = 1;
 772                                 next_chan = first_channel = (u32) ch->hw_value;
 773                                 max_pwr = ch->max_power;
 774                                 num_parsed_chan = 1;
 775                                 continue;
 776                         }
 777
 778                         if ((ch->hw_value == next_chan + 1) &&
 779                                         (ch->max_power == max_pwr)) {
 780                                 /* Consolidate adjacent channels */
 781                                 next_chan++;
 782                                 num_parsed_chan++;
 783                         } else {
 784                                 /* Add this triplet */
 785                                 lbs_deb_11d("11D triplet (%d, %d, %d)\n",
 786                                         first_channel, num_parsed_chan,
 787                                         max_pwr);
 788                                 t = &domain->triplet[num_triplet];
 789                                 t->chans.first_channel = first_channel;
 790                                 t->chans.num_channels = num_parsed_chan;
 791                                 t->chans.max_power = max_pwr;
 792                                 num_triplet++;
 793                                 flag = 0;
 794                         }
 795                 }
 796
 797                 if (flag) {
 798                         /* Add last triplet */
 799                         lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
 800                                 num_parsed_chan, max_pwr);
 801                         t = &domain->triplet[num_triplet];
 802                         t->chans.first_channel = first_channel;
 803                         t->chans.num_channels = num_parsed_chan;
 804                         t->chans.max_power = max_pwr;
 805                         num_triplet++;
 806                 }
 807         }
 808
 809         lbs_deb_11d("# triplets %d\n", num_triplet);
 810
 811         /* Set command header sizes */
 812         triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
 813         domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
 814                                         triplet_size);
 815
 816         lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
 817                         (u8 *) &cmd.domain.country_code,
 818                         le16_to_cpu(domain->header.len));
 819
 820         cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
 821                                    sizeof(cmd.action) +
 822                                    sizeof(cmd.domain.header) +
 823                                    sizeof(cmd.domain.country_code) +
 824                                    triplet_size);
 825
 826         ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
 827
 828         lbs_deb_leave_args(LBS_DEB_11D, "ret %d", ret);
 829         return ret;
 830 }
 831
 832 /**
 833  *  @brief Read a MAC, Baseband, or RF register
 834  *
 835  *  @param priv         pointer to struct lbs_private
 836  *  @param cmd          register command, one of CMD_MAC_REG_ACCESS,
 837  *                        CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 838  *  @param offset       byte offset of the register to get
 839  *  @param value        on success, the value of the register at 'offset'
 840  *
 841  *  @return             0 on success, error code on failure
 842 */
 843 int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
 844 {
 845         struct cmd_ds_reg_access cmd;
 846         int ret = 0;
 847
 848         lbs_deb_enter(LBS_DEB_CMD);
 849
 850         BUG_ON(value == NULL);
 851
 852         memset(&cmd, 0, sizeof(cmd));
 853         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 854         cmd.action = cpu_to_le16(CMD_ACT_GET);
 855
 856         if (reg != CMD_MAC_REG_ACCESS &&
 857             reg != CMD_BBP_REG_ACCESS &&
 858             reg != CMD_RF_REG_ACCESS) {
 859                 ret = -EINVAL;
 860                 goto out;
 861         }
 862
 863         ret = lbs_cmd_with_response(priv, reg, &cmd);
 864         if (ret) {
 865                 if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 866                         *value = cmd.value.bbp_rf;
 867                 else if (reg == CMD_MAC_REG_ACCESS)
 868                         *value = le32_to_cpu(cmd.value.mac);
 869         }
 870
 871 out:
 872         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 873         return ret;
 874 }
 875
 876 /**
 877  *  @brief Write a MAC, Baseband, or RF register
 878  *
 879  *  @param priv         pointer to struct lbs_private
 880  *  @param cmd          register command, one of CMD_MAC_REG_ACCESS,
 881  *                        CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 882  *  @param offset       byte offset of the register to set
 883  *  @param value        the value to write to the register at 'offset'
 884  *
 885  *  @return             0 on success, error code on failure
 886 */
 887 int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
 888 {
 889         struct cmd_ds_reg_access cmd;
 890         int ret = 0;
 891
 892         lbs_deb_enter(LBS_DEB_CMD);
 893
 894         memset(&cmd, 0, sizeof(cmd));
 895         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 896         cmd.action = cpu_to_le16(CMD_ACT_SET);
 897
 898         if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 899                 cmd.value.bbp_rf = (u8) (value & 0xFF);
 900         else if (reg == CMD_MAC_REG_ACCESS)
 901                 cmd.value.mac = cpu_to_le32(value);
 902         else {
 903                 ret = -EINVAL;
 904                 goto out;
 905         }
 906
 907         ret = lbs_cmd_with_response(priv, reg, &cmd);
 908
 909 out:
 910         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
 911         return ret;
 912 }
 913
 914 static void lbs_queue_cmd(struct lbs_private *priv,
 915                           struct cmd_ctrl_node *cmdnode)
 916 {
 917         unsigned long flags;
 918         int addtail = 1;
 919
 920         lbs_deb_enter(LBS_DEB_HOST);
 921
 922         if (!cmdnode) {
 923                 lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 924                 goto done;
 925         }
 926         if (!cmdnode->cmdbuf->size) {
 927                 lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 928                 goto done;
 929         }
 930         cmdnode->result = 0;
 931
 932         /* Exit_PS command needs to be queued in the header always. */
 933         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 934                 struct cmd_ds_802_11_ps_mode *psm = (void *) &cmdnode->cmdbuf;
 935
 936                 if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 937                         if (priv->psstate != PS_STATE_FULL_POWER)
 938                                 addtail = 0;
 939                 }
 940         }
 941
 942         if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
 943                 addtail = 0;
 944
 945         spin_lock_irqsave(&priv->driver_lock, flags);
 946
 947         if (addtail)
 948                 list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 949         else
 950                 list_add(&cmdnode->list, &priv->cmdpendingq);
 951
 952         spin_unlock_irqrestore(&priv->driver_lock, flags);
 953
 954         lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 955                      le16_to_cpu(cmdnode->cmdbuf->command));
 956
 957 done:
 958         lbs_deb_leave(LBS_DEB_HOST);
 959 }
 960
 961 static void lbs_submit_command(struct lbs_private *priv,
 962                                struct cmd_ctrl_node *cmdnode)
 963 {
 964         unsigned long flags;
 965         struct cmd_header *cmd;
 966         uint16_t cmdsize;
 967         uint16_t command;
 968         int timeo = 3 * HZ;
 969         int ret;
 970
 971         lbs_deb_enter(LBS_DEB_HOST);
 972
 973         cmd = cmdnode->cmdbuf;
 974
 975         spin_lock_irqsave(&priv->driver_lock, flags);
 976         priv->cur_cmd = cmdnode;
 977         spin_unlock_irqrestore(&priv->driver_lock, flags);
 978
 979         cmdsize = le16_to_cpu(cmd->size);
 980         command = le16_to_cpu(cmd->command);
 981
 982         /* These commands take longer */
 983         if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 984                 timeo = 5 * HZ;
 985
 986         lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 987                      command, le16_to_cpu(cmd->seqnum), cmdsize);
 988         lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 989
 990         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 991
 992         if (ret) {
 993                 lbs_pr_info("DNLD_CMD: hw_host_to_card failed: %d\n", ret);
 994                 /* Let the timer kick in and retry, and potentially reset
 995                    the whole thing if the condition persists */
 996                 timeo = HZ/4;
 997         }
 998
 999         if (command == CMD_802_11_DEEP_SLEEP) {
1000                 if (priv->is_auto_deep_sleep_enabled) {
1001                         priv->wakeup_dev_required = 1;
1002                         priv->dnld_sent = 0;
1003                 }
1004                 priv->is_deep_sleep = 1;
1005                 lbs_complete_command(priv, cmdnode, 0);
1006         } else {
1007                 /* Setup the timer after transmit command */
1008                 mod_timer(&priv->command_timer, jiffies + timeo);
1009         }
1010
1011         lbs_deb_leave(LBS_DEB_HOST);
1012 }
1013
1014 /**
1015  *  This function inserts command node to cmdfreeq
1016  *  after cleans it. Requires priv->driver_lock held.
1017  */
1018 static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1019                                          struct cmd_ctrl_node *cmdnode)
1020 {
1021         lbs_deb_enter(LBS_DEB_HOST);
1022
1023         if (!cmdnode)
1024                 goto out;
1025
1026         cmdnode->callback = NULL;
1027         cmdnode->callback_arg = 0;
1028
1029         memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
1030
1031         list_add_tail(&cmdnode->list, &priv->cmdfreeq);
1032  out:
1033         lbs_deb_leave(LBS_DEB_HOST);
1034 }
1035
1036 static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1037         struct cmd_ctrl_node *ptempcmd)
1038 {
1039         unsigned long flags;
1040
1041         spin_lock_irqsave(&priv->driver_lock, flags);
1042         __lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1043         spin_unlock_irqrestore(&priv->driver_lock, flags);
1044 }
1045
1046 void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1047                           int result)
1048 {
1049         cmd->result = result;
1050         cmd->cmdwaitqwoken = 1;
1051         wake_up_interruptible(&cmd->cmdwait_q);
1052
1053         if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1054                 __lbs_cleanup_and_insert_cmd(priv, cmd);
1055         priv->cur_cmd = NULL;
1056 }
1057
1058 int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1059 {
1060         struct cmd_ds_802_11_radio_control cmd;
1061         int ret = -EINVAL;
1062
1063         lbs_deb_enter(LBS_DEB_CMD);
1064
1065         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1066         cmd.action = cpu_to_le16(CMD_ACT_SET);
1067
1068         /* Only v8 and below support setting the preamble */
1069         if (priv->fwrelease < 0x09000000) {
1070                 switch (preamble) {
1071                 case RADIO_PREAMBLE_SHORT:
1072                 case RADIO_PREAMBLE_AUTO:
1073                 case RADIO_PREAMBLE_LONG:
1074                         cmd.control = cpu_to_le16(preamble);
1075                         break;
1076                 default:
1077                         goto out;
1078                 }
1079         }
1080
1081         if (radio_on)
1082                 cmd.control |= cpu_to_le16(0x1);
1083         else {
1084                 cmd.control &= cpu_to_le16(~0x1);
1085                 priv->txpower_cur = 0;
1086         }
1087
1088         lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1089                     radio_on ? "ON" : "OFF", preamble);
1090
1091         priv->radio_on = radio_on;
1092
1093         ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1094
1095 out:
1096         lbs_deb_leave_args(LBS_DEB_CMD, "ret %d", ret);
1097         return ret;
1098 }
1099
1100 void lbs_set_mac_control(struct lbs_private *priv)
1101 {
1102         struct cmd_ds_mac_control cmd;
1103
1104         lbs_deb_enter(LBS_DEB_CMD);
1105
1106         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1107         cmd.action = cpu_to_le16(priv->mac_control);
1108         cmd.reserved = 0;
1109
1110         lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1111
1112         lbs_deb_leave(LBS_DEB_CMD);
1113 }
1114
1115 /**
1116  *  @brief This function allocates the command buffer and link
1117  *  it to command free queue.
1118  *
1119  *  @param priv         A pointer to struct lbs_private structure
1120  *  @return             0 or -1
1121  */
1122 int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1123 {
1124         int ret = 0;
1125         u32 bufsize;
1126         u32 i;
1127         struct cmd_ctrl_node *cmdarray;
1128
1129         lbs_deb_enter(LBS_DEB_HOST);
1130
1131         /* Allocate and initialize the command array */
1132         bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1133         if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1134                 lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1135                 ret = -1;
1136                 goto done;
1137         }
1138         priv->cmd_array = cmdarray;
1139
1140         /* Allocate and initialize each command buffer in the command array */
1141         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1142                 cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1143                 if (!cmdarray[i].cmdbuf) {
1144                         lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1145                         ret = -1;
1146                         goto done;
1147                 }
1148         }
1149
1150         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1151                 init_waitqueue_head(&cmdarray[i].cmdwait_q);
1152                 lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1153         }
1154         ret = 0;
1155
1156 done:
1157         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1158         return ret;
1159 }
1160
1161 /**
1162  *  @brief This function frees the command buffer.
1163  *
1164  *  @param priv         A pointer to struct lbs_private structure
1165  *  @return             0 or -1
1166  */
1167 int lbs_free_cmd_buffer(struct lbs_private *priv)
1168 {
1169         struct cmd_ctrl_node *cmdarray;
1170         unsigned int i;
1171
1172         lbs_deb_enter(LBS_DEB_HOST);
1173
1174         /* need to check if cmd array is allocated or not */
1175         if (priv->cmd_array == NULL) {
1176                 lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1177                 goto done;
1178         }
1179
1180         cmdarray = priv->cmd_array;
1181
1182         /* Release shared memory buffers */
1183         for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1184                 if (cmdarray[i].cmdbuf) {
1185                         kfree(cmdarray[i].cmdbuf);
1186                         cmdarray[i].cmdbuf = NULL;
1187                 }
1188         }
1189
1190         /* Release cmd_ctrl_node */
1191         if (priv->cmd_array) {
1192                 kfree(priv->cmd_array);
1193                 priv->cmd_array = NULL;
1194         }
1195
1196 done:
1197         lbs_deb_leave(LBS_DEB_HOST);
1198         return 0;
1199 }
1200
1201 /**
1202  *  @brief This function gets a free command node if available in
1203  *  command free queue.
1204  *
1205  *  @param priv         A pointer to struct lbs_private structure
1206  *  @return cmd_ctrl_node A pointer to cmd_ctrl_node structure or NULL
1207  */
1208 static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1209 {
1210         struct cmd_ctrl_node *tempnode;
1211         unsigned long flags;
1212
1213         lbs_deb_enter(LBS_DEB_HOST);
1214
1215         if (!priv)
1216                 return NULL;
1217
1218         spin_lock_irqsave(&priv->driver_lock, flags);
1219
1220         if (!list_empty(&priv->cmdfreeq)) {
1221                 tempnode = list_first_entry(&priv->cmdfreeq,
1222                                             struct cmd_ctrl_node, list);
1223                 list_del(&tempnode->list);
1224         } else {
1225                 lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1226                 tempnode = NULL;
1227         }
1228
1229         spin_unlock_irqrestore(&priv->driver_lock, flags);
1230
1231         lbs_deb_leave(LBS_DEB_HOST);
1232         return tempnode;
1233 }
1234
1235 /**
1236  *  @brief This function executes next command in command
1237  *  pending queue. It will put firmware back to PS mode
1238  *  if applicable.
1239  *
1240  *  @param priv     A pointer to struct lbs_private structure
1241  *  @return        0 or -1
1242  */
1243 int lbs_execute_next_command(struct lbs_private *priv)
1244 {
1245         struct cmd_ctrl_node *cmdnode = NULL;
1246         struct cmd_header *cmd;
1247         unsigned long flags;
1248         int ret = 0;
1249
1250         /* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1251          * only caller to us is lbs_thread() and we get even when a
1252          * data packet is received */
1253         lbs_deb_enter(LBS_DEB_THREAD);
1254
1255         spin_lock_irqsave(&priv->driver_lock, flags);
1256
1257         if (priv->cur_cmd) {
1258                 lbs_pr_alert( "EXEC_NEXT_CMD: already processing command!\n");
1259                 spin_unlock_irqrestore(&priv->driver_lock, flags);
1260                 ret = -1;
1261                 goto done;
1262         }
1263
1264         if (!list_empty(&priv->cmdpendingq)) {
1265                 cmdnode = list_first_entry(&priv->cmdpendingq,
1266                                            struct cmd_ctrl_node, list);
1267         }
1268
1269         spin_unlock_irqrestore(&priv->driver_lock, flags);
1270
1271         if (cmdnode) {
1272                 cmd = cmdnode->cmdbuf;
1273
1274                 if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1275                         if ((priv->psstate == PS_STATE_SLEEP) ||
1276                             (priv->psstate == PS_STATE_PRE_SLEEP)) {
1277                                 lbs_deb_host(
1278                                        "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1279                                        le16_to_cpu(cmd->command),
1280                                        priv->psstate);
1281                                 ret = -1;
1282                                 goto done;
1283                         }
1284                         lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1285                                      "0x%04x in psstate %d\n",
1286                                      le16_to_cpu(cmd->command), priv->psstate);
1287                 } else if (priv->psstate != PS_STATE_FULL_POWER) {
1288                         /*
1289                          * 1. Non-PS command:
1290                          * Queue it. set needtowakeup to TRUE if current state
1291                          * is SLEEP, otherwise call send EXIT_PS.
1292                          * 2. PS command but not EXIT_PS:
1293                          * Ignore it.
1294                          * 3. PS command EXIT_PS:
1295                          * Set needtowakeup to TRUE if current state is SLEEP,
1296                          * otherwise send this command down to firmware
1297                          * immediately.
1298                          */
1299                         if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1300                                 /*  Prepare to send Exit PS,
1301                                  *  this non PS command will be sent later */
1302                                 if ((priv->psstate == PS_STATE_SLEEP)
1303                                     || (priv->psstate == PS_STATE_PRE_SLEEP)
1304                                     ) {
1305                                         /* w/ new scheme, it will not reach here.
1306                                            since it is blocked in main_thread. */
1307                                         priv->needtowakeup = 1;
1308                                 } else {
1309                                         lbs_set_ps_mode(priv,
1310                                                         PS_MODE_ACTION_EXIT_PS,
1311                                                         false);
1312                                 }
1313
1314                                 ret = 0;
1315                                 goto done;
1316                         } else {
1317                                 /*
1318                                  * PS command. Ignore it if it is not Exit_PS.
1319                                  * otherwise send it down immediately.
1320                                  */
1321                                 struct cmd_ds_802_11_ps_mode *psm = (void *)&cmd[1];
1322
1323                                 lbs_deb_host(
1324                                        "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1325                                        psm->action);
1326                                 if (psm->action !=
1327                                     cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1328                                         lbs_deb_host(
1329                                                "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1330                                         list_del(&cmdnode->list);
1331                                         spin_lock_irqsave(&priv->driver_lock, flags);
1332                                         lbs_complete_command(priv, cmdnode, 0);
1333                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1334
1335                                         ret = 0;
1336                                         goto done;
1337                                 }
1338
1339                                 if ((priv->psstate == PS_STATE_SLEEP) ||
1340                                     (priv->psstate == PS_STATE_PRE_SLEEP)) {
1341                                         lbs_deb_host(
1342                                                "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1343                                         list_del(&cmdnode->list);
1344                                         spin_lock_irqsave(&priv->driver_lock, flags);
1345                                         lbs_complete_command(priv, cmdnode, 0);
1346                                         spin_unlock_irqrestore(&priv->driver_lock, flags);
1347                                         priv->needtowakeup = 1;
1348
1349                                         ret = 0;
1350                                         goto done;
1351                                 }
1352
1353                                 lbs_deb_host(
1354                                        "EXEC_NEXT_CMD: sending EXIT_PS\n");
1355                         }
1356                 }
1357                 list_del(&cmdnode->list);
1358                 lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1359                             le16_to_cpu(cmd->command));
1360                 lbs_submit_command(priv, cmdnode);
1361         } else {
1362                 /*
1363                  * check if in power save mode, if yes, put the device back
1364                  * to PS mode
1365                  */
1366 #ifdef TODO
1367                 /*
1368                  * This was the old code for libertas+wext. Someone that
1369                  * understands this beast should re-code it in a sane way.
1370                  *
1371                  * I actually don't understand why this is related to WPA
1372                  * and to connection status, shouldn't powering should be
1373                  * independ of such things?
1374                  */
1375                 if ((priv->psmode != LBS802_11POWERMODECAM) &&
1376                     (priv->psstate == PS_STATE_FULL_POWER) &&
1377                     ((priv->connect_status == LBS_CONNECTED) ||
1378                     lbs_mesh_connected(priv))) {
1379                         if (priv->secinfo.WPAenabled ||
1380                             priv->secinfo.WPA2enabled) {
1381                                 /* check for valid WPA group keys */
1382                                 if (priv->wpa_mcast_key.len ||
1383                                     priv->wpa_unicast_key.len) {
1384                                         lbs_deb_host(
1385                                                "EXEC_NEXT_CMD: WPA enabled and GTK_SET"
1386                                                " go back to PS_SLEEP");
1387                                         lbs_set_ps_mode(priv,
1388                                                         PS_MODE_ACTION_ENTER_PS,
1389                                                         false);
1390                                 }
1391                         } else {
1392                                 lbs_deb_host(
1393                                        "EXEC_NEXT_CMD: cmdpendingq empty, "
1394                                        "go back to PS_SLEEP");
1395                                 lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1396                                                 false);
1397                         }
1398                 }
1399 #endif
1400         }
1401
1402         ret = 0;
1403 done:
1404         lbs_deb_leave(LBS_DEB_THREAD);
1405         return ret;
1406 }
1407
1408 static void lbs_send_confirmsleep(struct lbs_private *priv)
1409 {
1410         unsigned long flags;
1411         int ret;
1412
1413         lbs_deb_enter(LBS_DEB_HOST);
1414         lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1415                 sizeof(confirm_sleep));
1416
1417         ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1418                 sizeof(confirm_sleep));
1419         if (ret) {
1420                 lbs_pr_alert("confirm_sleep failed\n");
1421                 goto out;
1422         }
1423
1424         spin_lock_irqsave(&priv->driver_lock, flags);
1425
1426         /* We don't get a response on the sleep-confirmation */
1427         priv->dnld_sent = DNLD_RES_RECEIVED;
1428
1429         if (priv->is_host_sleep_configured) {
1430                 priv->is_host_sleep_activated = 1;
1431                 wake_up_interruptible(&priv->host_sleep_q);
1432         }
1433
1434         /* If nothing to do, go back to sleep (?) */
1435         if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1436                 priv->psstate = PS_STATE_SLEEP;
1437
1438         spin_unlock_irqrestore(&priv->driver_lock, flags);
1439
1440 out:
1441         lbs_deb_leave(LBS_DEB_HOST);
1442 }
1443
1444 /**
1445  *  @brief This function checks condition and prepares to
1446  *  send sleep confirm command to firmware if ok.
1447  *
1448  *  @param priv         A pointer to struct lbs_private structure
1449  *  @param psmode       Power Saving mode
1450  *  @return             n/a
1451  */
1452 void lbs_ps_confirm_sleep(struct lbs_private *priv)
1453 {
1454         unsigned long flags =0;
1455         int allowed = 1;
1456
1457         lbs_deb_enter(LBS_DEB_HOST);
1458
1459         spin_lock_irqsave(&priv->driver_lock, flags);
1460         if (priv->dnld_sent) {
1461                 allowed = 0;
1462                 lbs_deb_host("dnld_sent was set\n");
1463         }
1464
1465         /* In-progress command? */
1466         if (priv->cur_cmd) {
1467                 allowed = 0;
1468                 lbs_deb_host("cur_cmd was set\n");
1469         }
1470
1471         /* Pending events or command responses? */
1472         if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1473                 allowed = 0;
1474                 lbs_deb_host("pending events or command responses\n");
1475         }
1476         spin_unlock_irqrestore(&priv->driver_lock, flags);
1477
1478         if (allowed) {
1479                 lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1480                 lbs_send_confirmsleep(priv);
1481         } else {
1482                 lbs_deb_host("sleep confirm has been delayed\n");
1483         }
1484
1485         lbs_deb_leave(LBS_DEB_HOST);
1486 }
1487
1488
1489 /**
1490  * @brief Configures the transmission power control functionality.
1491  *
1492  * @param priv          A pointer to struct lbs_private structure
1493  * @param enable        Transmission power control enable
1494  * @param p0            Power level when link quality is good (dBm).
1495  * @param p1            Power level when link quality is fair (dBm).
1496  * @param p2            Power level when link quality is poor (dBm).
1497  * @param usesnr        Use Signal to Noise Ratio in TPC
1498  *
1499  * @return 0 on success
1500  */
1501 int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1502                 int8_t p2, int usesnr)
1503 {
1504         struct cmd_ds_802_11_tpc_cfg cmd;
1505         int ret;
1506
1507         memset(&cmd, 0, sizeof(cmd));
1508         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1509         cmd.action = cpu_to_le16(CMD_ACT_SET);
1510         cmd.enable = !!enable;
1511         cmd.usesnr = !!usesnr;
1512         cmd.P0 = p0;
1513         cmd.P1 = p1;
1514         cmd.P2 = p2;
1515
1516         ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1517
1518         return ret;
1519 }
1520
1521 /**
1522  * @brief Configures the power adaptation settings.
1523  *
1524  * @param priv          A pointer to struct lbs_private structure
1525  * @param enable        Power adaptation enable
1526  * @param p0            Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1527  * @param p1            Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1528  * @param p2            Power level for 48 and 54 Mbps (dBm).
1529  *
1530  * @return 0 on Success
1531  */
1532
1533 int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1534                 int8_t p1, int8_t p2)
1535 {
1536         struct cmd_ds_802_11_pa_cfg cmd;
1537         int ret;
1538
1539         memset(&cmd, 0, sizeof(cmd));
1540         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1541         cmd.action = cpu_to_le16(CMD_ACT_SET);
1542         cmd.enable = !!enable;
1543         cmd.P0 = p0;
1544         cmd.P1 = p1;
1545         cmd.P2 = p2;
1546
1547         ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1548
1549         return ret;
1550 }
1551
1552
1553 struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1554         uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1555         int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1556         unsigned long callback_arg)
1557 {
1558         struct cmd_ctrl_node *cmdnode;
1559
1560         lbs_deb_enter(LBS_DEB_HOST);
1561
1562         if (priv->surpriseremoved) {
1563                 lbs_deb_host("PREP_CMD: card removed\n");
1564                 cmdnode = ERR_PTR(-ENOENT);
1565                 goto done;
1566         }
1567
1568         /* No commands are allowed in Deep Sleep until we toggle the GPIO
1569          * to wake up the card and it has signaled that it's ready.
1570          */
1571         if (!priv->is_auto_deep_sleep_enabled) {
1572                 if (priv->is_deep_sleep) {
1573                         lbs_deb_cmd("command not allowed in deep sleep\n");
1574                         cmdnode = ERR_PTR(-EBUSY);
1575                         goto done;
1576                 }
1577         }
1578
1579         cmdnode = lbs_get_free_cmd_node(priv);
1580         if (cmdnode == NULL) {
1581                 lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1582
1583                 /* Wake up main thread to execute next command */
1584                 wake_up_interruptible(&priv->waitq);
1585                 cmdnode = ERR_PTR(-ENOBUFS);
1586                 goto done;
1587         }
1588
1589         cmdnode->callback = callback;
1590         cmdnode->callback_arg = callback_arg;
1591
1592         /* Copy the incoming command to the buffer */
1593         memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1594
1595         /* Set sequence number, clean result, move to buffer */
1596         priv->seqnum++;
1597         cmdnode->cmdbuf->command = cpu_to_le16(command);
1598         cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1599         cmdnode->cmdbuf->seqnum  = cpu_to_le16(priv->seqnum);
1600         cmdnode->cmdbuf->result  = 0;
1601
1602         lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1603
1604         cmdnode->cmdwaitqwoken = 0;
1605         lbs_queue_cmd(priv, cmdnode);
1606         wake_up_interruptible(&priv->waitq);
1607
1608  done:
1609         lbs_deb_leave_args(LBS_DEB_HOST, "ret %p", cmdnode);
1610         return cmdnode;
1611 }
1612
1613 void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1614         struct cmd_header *in_cmd, int in_cmd_size)
1615 {
1616         lbs_deb_enter(LBS_DEB_CMD);
1617         __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1618                 lbs_cmd_async_callback, 0);
1619         lbs_deb_leave(LBS_DEB_CMD);
1620 }
1621
1622 int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1623               struct cmd_header *in_cmd, int in_cmd_size,
1624               int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1625               unsigned long callback_arg)
1626 {
1627         struct cmd_ctrl_node *cmdnode;
1628         unsigned long flags;
1629         int ret = 0;
1630
1631         lbs_deb_enter(LBS_DEB_HOST);
1632
1633         cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1634                                   callback, callback_arg);
1635         if (IS_ERR(cmdnode)) {
1636                 ret = PTR_ERR(cmdnode);
1637                 goto done;
1638         }
1639
1640         might_sleep();
1641         wait_event_interruptible(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1642
1643         spin_lock_irqsave(&priv->driver_lock, flags);
1644         ret = cmdnode->result;
1645         if (ret)
1646                 lbs_pr_info("PREP_CMD: command 0x%04x failed: %d\n",
1647                             command, ret);
1648
1649         __lbs_cleanup_and_insert_cmd(priv, cmdnode);
1650         spin_unlock_irqrestore(&priv->driver_lock, flags);
1651
1652 done:
1653         lbs_deb_leave_args(LBS_DEB_HOST, "ret %d", ret);
1654         return ret;
1655 }
1656 EXPORT_SYMBOL_GPL(__lbs_cmd);