drivers/net/wireless/mwifiex/init.c

   1 /*
   2  * Marvell Wireless LAN device driver: HW/FW Initialization
   3  *
   4  * Copyright (C) 2011, Marvell International Ltd.
   5  *
   6  * This software file (the "File") is distributed by Marvell International
   7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
   8  * (the "License").  You may use, redistribute and/or modify this File in
   9  * accordance with the terms and conditions of the License, a copy of which
  10  * is available by writing to the Free Software Foundation, Inc.,
  11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
  12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
  13  *
  14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
  17  * this warranty disclaimer.
  18  */
  19
  20 #include "decl.h"
  21 #include "ioctl.h"
  22 #include "util.h"
  23 #include "fw.h"
  24 #include "main.h"
  25 #include "wmm.h"
  26 #include "11n.h"
  27
  28 /*
  29  * This function adds a BSS priority table to the table list.
  30  *
  31  * The function allocates a new BSS priority table node and adds it to
  32  * the end of BSS priority table list, kept in driver memory.
  33  */
  34 static int mwifiex_add_bss_prio_tbl(struct mwifiex_private *priv)
  35 {
  36         struct mwifiex_adapter *adapter = priv->adapter;
  37         struct mwifiex_bss_prio_node *bss_prio;
  38         unsigned long flags;
  39
  40         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  41         if (!bss_prio) {
  42                 dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
  43                                                 __func__);
  44                 return -1;
  45         }
  46
  47         bss_prio->priv = priv;
  48         INIT_LIST_HEAD(&bss_prio->list);
  49         if (!adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur)
  50                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
  51                         bss_prio;
  52
  53         spin_lock_irqsave(&adapter->bss_prio_tbl[priv->bss_priority]
  54                         .bss_prio_lock, flags);
  55         list_add_tail(&bss_prio->list,
  56                         &adapter->bss_prio_tbl[priv->bss_priority]
  57                         .bss_prio_head);
  58         spin_unlock_irqrestore(&adapter->bss_prio_tbl[priv->bss_priority]
  59                         .bss_prio_lock, flags);
  60
  61         return 0;
  62 }
  63
  64 /*
  65  * This function initializes the private structure and sets default
  66  * values to the members.
  67  *
  68  * Additionally, it also initializes all the locks and sets up all the
  69  * lists.
  70  */
  71 static int mwifiex_init_priv(struct mwifiex_private *priv)
  72 {
  73         u32 i;
  74         int ret = 0;
  75
  76         priv->media_connected = false;
  77         memset(priv->curr_addr, 0xff, ETH_ALEN);
  78
  79         priv->pkt_tx_ctrl = 0;
  80         priv->bss_mode = NL80211_IFTYPE_STATION;
  81         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  82         priv->is_data_rate_auto = true;
  83         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  84         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  85
  86         priv->sec_info.wep_status = MWIFIEX_802_11_WEP_DISABLED;
  87         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  88         priv->sec_info.encryption_mode = 0;
  89         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  90                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  91         priv->wep_key_curr_index = 0;
  92         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  93                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  94
  95         priv->beacon_period = 100; /* beacon interval */ ;
  96         priv->attempted_bss_desc = NULL;
  97         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
  98         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
  99
 100         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 101         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 102         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 103         priv->assoc_rsp_size = 0;
 104         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 105         priv->atim_window = 0;
 106         priv->adhoc_state = ADHOC_IDLE;
 107         priv->tx_power_level = 0;
 108         priv->max_tx_power_level = 0;
 109         priv->min_tx_power_level = 0;
 110         priv->tx_rate = 0;
 111         priv->rxpd_htinfo = 0;
 112         priv->rxpd_rate = 0;
 113         priv->rate_bitmap = 0;
 114         priv->data_rssi_last = 0;
 115         priv->data_rssi_avg = 0;
 116         priv->data_nf_avg = 0;
 117         priv->data_nf_last = 0;
 118         priv->bcn_rssi_last = 0;
 119         priv->bcn_rssi_avg = 0;
 120         priv->bcn_nf_avg = 0;
 121         priv->bcn_nf_last = 0;
 122         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 123         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 124         priv->wpa_ie_len = 0;
 125         priv->wpa_is_gtk_set = false;
 126
 127         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 128         priv->assoc_tlv_buf_len = 0;
 129         memset(&priv->wps, 0, sizeof(priv->wps));
 130         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 131         priv->gen_ie_buf_len = 0;
 132         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 133
 134         priv->wmm_required = true;
 135         priv->wmm_enabled = false;
 136         priv->wmm_qosinfo = 0;
 137         priv->curr_bcn_buf = NULL;
 138         priv->curr_bcn_size = 0;
 139
 140         priv->scan_block = false;
 141
 142         ret = mwifiex_add_bss_prio_tbl(priv);
 143
 144         return ret;
 145 }
 146
 147 /*
 148  * This function allocates buffers for members of the adapter
 149  * structure.
 150  *
 151  * The memory allocated includes scan table, command buffers, and
 152  * sleep confirm command buffer. In addition, the queues are
 153  * also initialized.
 154  */
 155 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 156 {
 157         int ret = 0;
 158         u32 buf_size;
 159         struct mwifiex_bssdescriptor *temp_scan_table;
 160
 161         /* Allocate buffer to store the BSSID list */
 162         buf_size = sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP;
 163         temp_scan_table = kzalloc(buf_size, GFP_KERNEL);
 164         if (!temp_scan_table) {
 165                 dev_err(adapter->dev, "%s: failed to alloc temp_scan_table\n",
 166                        __func__);
 167                 return -1;
 168         }
 169
 170         adapter->scan_table = temp_scan_table;
 171
 172         /* Allocate command buffer */
 173         ret = mwifiex_alloc_cmd_buffer(adapter);
 174         if (ret) {
 175                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 176                        __func__);
 177                 return -1;
 178         }
 179
 180         adapter->sleep_cfm =
 181                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm_buffer)
 182                                 + INTF_HEADER_LEN);
 183
 184         if (!adapter->sleep_cfm) {
 185                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 186                         " cmd buffer\n", __func__);
 187                 return -1;
 188         }
 189         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 190
 191         return 0;
 192 }
 193
 194 /*
 195  * This function initializes the adapter structure and sets default
 196  * values to the members of adapter.
 197  *
 198  * This also initializes the WMM related parameters in the driver private
 199  * structures.
 200  */
 201 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 202 {
 203         struct mwifiex_opt_sleep_confirm_buffer *sleep_cfm_buf = NULL;
 204
 205         skb_put(adapter->sleep_cfm, sizeof(sleep_cfm_buf->ps_cfm_sleep));
 206         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm_buffer *)
 207                                                 (adapter->sleep_cfm->data);
 208
 209         adapter->cmd_sent = false;
 210         adapter->data_sent = true;
 211         adapter->cmd_resp_received = false;
 212         adapter->event_received = false;
 213         adapter->data_received = false;
 214
 215         adapter->surprise_removed = false;
 216
 217         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 218
 219         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 220         adapter->ps_state = PS_STATE_AWAKE;
 221         adapter->need_to_wakeup = false;
 222
 223         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 224         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 225         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 226         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 227
 228         adapter->num_in_scan_table = 0;
 229         memset(adapter->scan_table, 0,
 230                (sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP));
 231         adapter->scan_probes = 1;
 232
 233         memset(adapter->bcn_buf, 0, sizeof(adapter->bcn_buf));
 234         adapter->bcn_buf_end = adapter->bcn_buf;
 235
 236         adapter->multiple_dtim = 1;
 237
 238         adapter->local_listen_interval = 0;     /* default value in firmware
 239                                                    will be used */
 240
 241         adapter->is_deep_sleep = false;
 242
 243         adapter->delay_null_pkt = false;
 244         adapter->delay_to_ps = 1000;
 245         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 246
 247         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 248                                            default */
 249         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 250                                            default */
 251         adapter->pm_wakeup_card_req = false;
 252
 253         adapter->pm_wakeup_fw_try = false;
 254
 255         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 256         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 257         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 258
 259         adapter->is_hs_configured = false;
 260         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 261         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 262         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 263         adapter->hs_activated = false;
 264
 265         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 266         adapter->hw_dot_11n_dev_cap = 0;
 267         adapter->hw_dev_mcs_support = 0;
 268         adapter->chan_offset = 0;
 269         adapter->adhoc_11n_enabled = false;
 270
 271         mwifiex_wmm_init(adapter);
 272
 273         if (adapter->sleep_cfm) {
 274                 memset(&sleep_cfm_buf->ps_cfm_sleep, 0,
 275                         adapter->sleep_cfm->len);
 276                 sleep_cfm_buf->ps_cfm_sleep.command =
 277                         cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 278                 sleep_cfm_buf->ps_cfm_sleep.size =
 279                         cpu_to_le16(adapter->sleep_cfm->len);
 280                 sleep_cfm_buf->ps_cfm_sleep.result = 0;
 281                 sleep_cfm_buf->ps_cfm_sleep.action = cpu_to_le16(SLEEP_CONFIRM);
 282                 sleep_cfm_buf->ps_cfm_sleep.resp_ctrl =
 283                         cpu_to_le16(RESP_NEEDED);
 284         }
 285         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 286         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 287         adapter->tx_lock_flag = false;
 288         adapter->null_pkt_interval = 0;
 289         adapter->fw_bands = 0;
 290         adapter->config_bands = 0;
 291         adapter->adhoc_start_band = 0;
 292         adapter->scan_channels = NULL;
 293         adapter->fw_release_number = 0;
 294         adapter->fw_cap_info = 0;
 295         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 296         adapter->event_cause = 0;
 297         adapter->region_code = 0;
 298         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 299         adapter->adhoc_awake_period = 0;
 300         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 301         adapter->arp_filter_size = 0;
 302 }
 303
 304 /*
 305  * This function frees the adapter structure.
 306  *
 307  * The freeing operation is done recursively, by canceling all
 308  * pending commands, freeing the member buffers previously
 309  * allocated (command buffers, scan table buffer, sleep confirm
 310  * command buffer), stopping the timers and calling the cleanup
 311  * routines for every interface, before the actual adapter
 312  * structure is freed.
 313  */
 314 static void
 315 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 316 {
 317         if (!adapter) {
 318                 pr_err("%s: adapter is NULL\n", __func__);
 319                 return;
 320         }
 321
 322         mwifiex_cancel_all_pending_cmd(adapter);
 323
 324         /* Free lock variables */
 325         mwifiex_free_lock_list(adapter);
 326
 327         /* Free command buffer */
 328         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 329         mwifiex_free_cmd_buffer(adapter);
 330
 331         del_timer(&adapter->cmd_timer);
 332
 333         dev_dbg(adapter->dev, "info: free scan table\n");
 334         kfree(adapter->scan_table);
 335         adapter->scan_table = NULL;
 336
 337         adapter->if_ops.cleanup_if(adapter);
 338
 339         dev_kfree_skb_any(adapter->sleep_cfm);
 340 }
 341
 342 /*
 343  *  This function intializes the lock variables and
 344  *  the list heads.
 345  */
 346 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 347 {
 348         struct mwifiex_private   *priv = NULL;
 349         s32           i = 0;
 350         u32           j = 0;
 351
 352         spin_lock_init(&adapter->mwifiex_lock);
 353         spin_lock_init(&adapter->int_lock);
 354         spin_lock_init(&adapter->main_proc_lock);
 355         spin_lock_init(&adapter->mwifiex_cmd_lock);
 356         for (i = 0; i < adapter->priv_num; i++) {
 357                 if (adapter->priv[i]) {
 358                         priv = adapter->priv[i];
 359                         spin_lock_init(&priv->rx_pkt_lock);
 360                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 361                         spin_lock_init(&priv->curr_bcn_buf_lock);
 362                 }
 363         }
 364
 365         /* Initialize cmd_free_q */
 366         INIT_LIST_HEAD(&adapter->cmd_free_q);
 367         /* Initialize cmd_pending_q */
 368         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 369         /* Initialize scan_pending_q */
 370         INIT_LIST_HEAD(&adapter->scan_pending_q);
 371
 372         spin_lock_init(&adapter->cmd_free_q_lock);
 373         spin_lock_init(&adapter->cmd_pending_q_lock);
 374         spin_lock_init(&adapter->scan_pending_q_lock);
 375
 376         for (i = 0; i < adapter->priv_num; ++i) {
 377                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 378                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 379                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 380         }
 381
 382         for (i = 0; i < adapter->priv_num; i++) {
 383                 if (!adapter->priv[i])
 384                         continue;
 385                 priv = adapter->priv[i];
 386                 for (j = 0; j < MAX_NUM_TID; ++j) {
 387                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 388                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 389                 }
 390                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 391                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 392
 393                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 394                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 395         }
 396
 397         return 0;
 398 }
 399
 400 /*
 401  *  This function releases the lock variables and frees the locks and
 402  *  associated locks.
 403  */
 404 void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 405 {
 406         struct mwifiex_private *priv = NULL;
 407         s32           i = 0;
 408         s32           j = 0;
 409
 410         /* Free lists */
 411         list_del(&adapter->cmd_free_q);
 412         list_del(&adapter->cmd_pending_q);
 413         list_del(&adapter->scan_pending_q);
 414
 415         for (i = 0; i < adapter->priv_num; i++)
 416                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 417
 418         for (i = 0; i < adapter->priv_num; i++) {
 419                 if (adapter->priv[i]) {
 420                         priv = adapter->priv[i];
 421                         for (j = 0; j < MAX_NUM_TID; ++j)
 422                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 423                         list_del(&priv->tx_ba_stream_tbl_ptr);
 424                         list_del(&priv->rx_reorder_tbl_ptr);
 425                 }
 426         }
 427 }
 428
 429 /*
 430  * This function initializes the firmware.
 431  *
 432  * The following operations are performed sequentially -
 433  *      - Allocate adapter structure
 434  *      - Initialize the adapter structure
 435  *      - Initialize the private structure
 436  *      - Add BSS priority tables to the adapter structure
 437  *      - For each interface, send the init commands to firmware
 438  *      - Send the first command in command pending queue, if available
 439  */
 440 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 441 {
 442         int ret = 0;
 443         struct mwifiex_private *priv = NULL;
 444         u8 i = 0;
 445         u8 first_sta = true;
 446         int is_cmd_pend_q_empty;
 447         unsigned long flags;
 448
 449         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 450
 451         /* Allocate memory for member of adapter structure */
 452         ret = mwifiex_allocate_adapter(adapter);
 453         if (ret)
 454                 return -1;
 455
 456         /* Initialize adapter structure */
 457         mwifiex_init_adapter(adapter);
 458
 459         for (i = 0; i < adapter->priv_num; i++) {
 460                 if (adapter->priv[i]) {
 461                         priv = adapter->priv[i];
 462
 463                         /* Initialize private structure */
 464                         ret = mwifiex_init_priv(priv);
 465                         if (ret)
 466                                 return -1;
 467                 }
 468         }
 469         for (i = 0; i < adapter->priv_num; i++) {
 470                 if (adapter->priv[i]) {
 471                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 472                         if (ret == -1)
 473                                 return -1;
 474
 475                         first_sta = false;
 476                 }
 477         }
 478
 479         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 480         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 481         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 482         if (!is_cmd_pend_q_empty) {
 483                 /* Send the first command in queue and return */
 484                 if (mwifiex_main_process(adapter) != -1)
 485                         ret = -EINPROGRESS;
 486         } else {
 487                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 488         }
 489
 490         return ret;
 491 }
 492
 493 /*
 494  * This function deletes the BSS priority tables.
 495  *
 496  * The function traverses through all the allocated BSS priority nodes
 497  * in every BSS priority table and frees them.
 498  */
 499 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 500 {
 501         int i;
 502         struct mwifiex_adapter *adapter = priv->adapter;
 503         struct mwifiex_bss_prio_node *bssprio_node = NULL, *tmp_node = NULL,
 504                                                                 **cur = NULL;
 505         struct list_head *head;
 506         spinlock_t *lock;
 507         unsigned long flags;
 508
 509         for (i = 0; i < adapter->priv_num; ++i) {
 510                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 511                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 512                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 513                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 514                                 " index = %d, i = %d, head = %p, cur = %p\n",
 515                               priv->bss_index, i, head, *cur);
 516                 if (*cur) {
 517                         spin_lock_irqsave(lock, flags);
 518                         if (list_empty(head)) {
 519                                 spin_unlock_irqrestore(lock, flags);
 520                                 continue;
 521                         }
 522                         bssprio_node = list_first_entry(head,
 523                                         struct mwifiex_bss_prio_node, list);
 524                         spin_unlock_irqrestore(lock, flags);
 525
 526                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 527                                                  list) {
 528                                 if (bssprio_node->priv == priv) {
 529                                         dev_dbg(adapter->dev, "info: Delete "
 530                                                 "node %p, next = %p\n",
 531                                                 bssprio_node, tmp_node);
 532                                         spin_lock_irqsave(lock, flags);
 533                                         list_del(&bssprio_node->list);
 534                                         spin_unlock_irqrestore(lock, flags);
 535                                         kfree(bssprio_node);
 536                                 }
 537                         }
 538                         *cur = (struct mwifiex_bss_prio_node *)head;
 539                 }
 540         }
 541 }
 542
 543 /*
 544  * This function is used to shutdown the driver.
 545  *
 546  * The following operations are performed sequentially -
 547  *      - Check if already shut down
 548  *      - Make sure the main process has stopped
 549  *      - Clean up the Tx and Rx queues
 550  *      - Delete BSS priority tables
 551  *      - Free the adapter
 552  *      - Notify completion
 553  */
 554 int
 555 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 556 {
 557         int ret = -EINPROGRESS;
 558         struct mwifiex_private *priv = NULL;
 559         s32 i = 0;
 560         unsigned long flags;
 561
 562         /* mwifiex already shutdown */
 563         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 564                 return 0;
 565
 566         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 567         /* wait for mwifiex_process to complete */
 568         if (adapter->mwifiex_processing) {
 569                 dev_warn(adapter->dev, "main process is still running\n");
 570                 return ret;
 571         }
 572
 573         /* shut down mwifiex */
 574         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 575
 576         /* Clean up Tx/Rx queues and delete BSS priority table */
 577         for (i = 0; i < adapter->priv_num; i++) {
 578                 if (adapter->priv[i]) {
 579                         priv = adapter->priv[i];
 580
 581                         mwifiex_clean_txrx(priv);
 582                         mwifiex_delete_bss_prio_tbl(priv);
 583                 }
 584         }
 585
 586         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 587
 588         /* Free adapter structure */
 589         mwifiex_free_adapter(adapter);
 590
 591         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 592
 593         /* Notify completion */
 594         ret = mwifiex_shutdown_fw_complete(adapter);
 595
 596         return ret;
 597 }
 598
 599 /*
 600  * This function downloads the firmware to the card.
 601  *
 602  * The actual download is preceded by two sanity checks -
 603  *      - Check if firmware is already running
 604  *      - Check if the interface is the winner to download the firmware
 605  *
 606  * ...and followed by another -
 607  *      - Check if the firmware is downloaded successfully
 608  *
 609  * After download is successfully completed, the host interrupts are enabled.
 610  */
 611 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 612                     struct mwifiex_fw_image *pmfw)
 613 {
 614         int ret = 0;
 615         u32 poll_num = 1;
 616         int winner;
 617
 618         /* Check if firmware is already running */
 619         ret = adapter->if_ops.check_fw_status(adapter, poll_num, &winner);
 620         if (!ret) {
 621                 dev_notice(adapter->dev,
 622                                 "WLAN FW already running! Skip FW download\n");
 623                 goto done;
 624         }
 625         poll_num = MAX_FIRMWARE_POLL_TRIES;
 626
 627         /* Check if we are the winner for downloading FW */
 628         if (!winner) {
 629                 dev_notice(adapter->dev,
 630                                 "Other interface already running!"
 631                                 " Skip FW download\n");
 632                 poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 633                 goto poll_fw;
 634         }
 635         if (pmfw) {
 636                 /* Download firmware with helper */
 637                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 638                 if (ret) {
 639                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 640                         return ret;
 641                 }
 642         }
 643
 644 poll_fw:
 645         /* Check if the firmware is downloaded successfully or not */
 646         ret = adapter->if_ops.check_fw_status(adapter, poll_num, NULL);
 647         if (ret) {
 648                 dev_err(adapter->dev, "FW failed to be active in time\n");
 649                 return -1;
 650         }
 651 done:
 652         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 653         adapter->if_ops.enable_int(adapter);
 654         return ret;
 655 }