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         int status = 0;
  39         unsigned long flags;
  40
  41         bss_prio = kzalloc(sizeof(struct mwifiex_bss_prio_node), GFP_KERNEL);
  42         if (!bss_prio) {
  43                 dev_err(adapter->dev, "%s: failed to alloc bss_prio\n",
  44                                                 __func__);
  45                 return -1;
  46         }
  47
  48         bss_prio->priv = priv;
  49         INIT_LIST_HEAD(&bss_prio->list);
  50         if (!adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur)
  51                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
  52                         bss_prio;
  53
  54         spin_lock_irqsave(&adapter->bss_prio_tbl[priv->bss_priority]
  55                         .bss_prio_lock, flags);
  56         list_add_tail(&bss_prio->list,
  57                         &adapter->bss_prio_tbl[priv->bss_priority]
  58                         .bss_prio_head);
  59         spin_unlock_irqrestore(&adapter->bss_prio_tbl[priv->bss_priority]
  60                         .bss_prio_lock, flags);
  61
  62         return status;
  63 }
  64
  65 /*
  66  * This function initializes the private structure and sets default
  67  * values to the members.
  68  *
  69  * Additionally, it also initializes all the locks and sets up all the
  70  * lists.
  71  */
  72 static int mwifiex_init_priv(struct mwifiex_private *priv)
  73 {
  74         u32 i;
  75         int ret = 0;
  76
  77         priv->media_connected = false;
  78         memset(priv->curr_addr, 0xff, ETH_ALEN);
  79
  80         priv->pkt_tx_ctrl = 0;
  81         priv->bss_mode = NL80211_IFTYPE_STATION;
  82         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  83         priv->is_data_rate_auto = true;
  84         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  85         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  86
  87         priv->sec_info.wep_status = MWIFIEX_802_11_WEP_DISABLED;
  88         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  89         priv->sec_info.encryption_mode = MWIFIEX_ENCRYPTION_MODE_NONE;
  90         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  91                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  92         priv->wep_key_curr_index = 0;
  93         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  94                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  95
  96         priv->beacon_period = 100; /* beacon interval */ ;
  97         priv->attempted_bss_desc = NULL;
  98         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
  99         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
 100
 101         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
 102         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
 103         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
 104         priv->assoc_rsp_size = 0;
 105         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 106         priv->atim_window = 0;
 107         priv->adhoc_state = ADHOC_IDLE;
 108         priv->tx_power_level = 0;
 109         priv->max_tx_power_level = 0;
 110         priv->min_tx_power_level = 0;
 111         priv->tx_rate = 0;
 112         priv->rxpd_htinfo = 0;
 113         priv->rxpd_rate = 0;
 114         priv->rate_bitmap = 0;
 115         priv->data_rssi_last = 0;
 116         priv->data_rssi_avg = 0;
 117         priv->data_nf_avg = 0;
 118         priv->data_nf_last = 0;
 119         priv->bcn_rssi_last = 0;
 120         priv->bcn_rssi_avg = 0;
 121         priv->bcn_nf_avg = 0;
 122         priv->bcn_nf_last = 0;
 123         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 124         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 125         priv->wpa_ie_len = 0;
 126         priv->wpa_is_gtk_set = false;
 127
 128         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 129         priv->assoc_tlv_buf_len = 0;
 130         memset(&priv->wps, 0, sizeof(priv->wps));
 131         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 132         priv->gen_ie_buf_len = 0;
 133         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 134
 135         priv->wmm_required = true;
 136         priv->wmm_enabled = false;
 137         priv->wmm_qosinfo = 0;
 138         priv->curr_bcn_buf = NULL;
 139         priv->curr_bcn_size = 0;
 140
 141         priv->scan_block = false;
 142
 143         ret = mwifiex_add_bss_prio_tbl(priv);
 144
 145         return ret;
 146 }
 147
 148 /*
 149  * This function allocates buffers for members of the adapter
 150  * structure.
 151  *
 152  * The memory allocated includes scan table, command buffers, and
 153  * sleep confirm command buffer. In addition, the queues are
 154  * also initialized.
 155  */
 156 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 157 {
 158         int ret = 0;
 159         u32 buf_size;
 160         struct mwifiex_bssdescriptor *temp_scan_table;
 161
 162         /* Allocate buffer to store the BSSID list */
 163         buf_size = sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP;
 164         temp_scan_table = kzalloc(buf_size, GFP_KERNEL);
 165         if (!temp_scan_table) {
 166                 dev_err(adapter->dev, "%s: failed to alloc temp_scan_table\n",
 167                        __func__);
 168                 return -1;
 169         }
 170
 171         adapter->scan_table = temp_scan_table;
 172
 173         /* Allocate command buffer */
 174         ret = mwifiex_alloc_cmd_buffer(adapter);
 175         if (ret) {
 176                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 177                        __func__);
 178                 return -1;
 179         }
 180
 181         adapter->sleep_cfm =
 182                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm_buffer)
 183                                 + INTF_HEADER_LEN);
 184
 185         if (!adapter->sleep_cfm) {
 186                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 187                         " cmd buffer\n", __func__);
 188                 return -1;
 189         }
 190         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 191
 192         return 0;
 193 }
 194
 195 /*
 196  * This function initializes the adapter structure and sets default
 197  * values to the members of adapter.
 198  *
 199  * This also initializes the WMM related parameters in the driver private
 200  * structures.
 201  */
 202 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 203 {
 204         struct mwifiex_opt_sleep_confirm_buffer *sleep_cfm_buf = NULL;
 205
 206         skb_put(adapter->sleep_cfm, sizeof(sleep_cfm_buf->ps_cfm_sleep));
 207         sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm_buffer *)
 208                                                 (adapter->sleep_cfm->data);
 209
 210         adapter->cmd_sent = false;
 211         adapter->data_sent = true;
 212         adapter->cmd_resp_received = false;
 213         adapter->event_received = false;
 214         adapter->data_received = false;
 215
 216         adapter->surprise_removed = false;
 217
 218         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 219
 220         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 221         adapter->ps_state = PS_STATE_AWAKE;
 222         adapter->need_to_wakeup = false;
 223
 224         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 225         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 226         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 227         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 228
 229         adapter->num_in_scan_table = 0;
 230         memset(adapter->scan_table, 0,
 231                (sizeof(struct mwifiex_bssdescriptor) * IW_MAX_AP));
 232         adapter->scan_probes = 1;
 233
 234         memset(adapter->bcn_buf, 0, sizeof(adapter->bcn_buf));
 235         adapter->bcn_buf_end = adapter->bcn_buf;
 236
 237         adapter->multiple_dtim = 1;
 238
 239         adapter->local_listen_interval = 0;     /* default value in firmware
 240                                                    will be used */
 241
 242         adapter->is_deep_sleep = false;
 243
 244         adapter->delay_null_pkt = false;
 245         adapter->delay_to_ps = 1000;
 246         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 247
 248         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 249                                            default */
 250         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 251                                            default */
 252         adapter->pm_wakeup_card_req = false;
 253
 254         adapter->pm_wakeup_fw_try = false;
 255
 256         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 257         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 258         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 259
 260         adapter->is_hs_configured = false;
 261         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 262         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 263         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 264         adapter->hs_activated = false;
 265
 266         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 267         adapter->hw_dot_11n_dev_cap = 0;
 268         adapter->hw_dev_mcs_support = 0;
 269         adapter->chan_offset = 0;
 270         adapter->adhoc_11n_enabled = false;
 271
 272         mwifiex_wmm_init(adapter);
 273
 274         if (adapter->sleep_cfm) {
 275                 memset(&sleep_cfm_buf->ps_cfm_sleep, 0,
 276                         adapter->sleep_cfm->len);
 277                 sleep_cfm_buf->ps_cfm_sleep.command =
 278                         cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 279                 sleep_cfm_buf->ps_cfm_sleep.size =
 280                         cpu_to_le16(adapter->sleep_cfm->len);
 281                 sleep_cfm_buf->ps_cfm_sleep.result = 0;
 282                 sleep_cfm_buf->ps_cfm_sleep.action = cpu_to_le16(SLEEP_CONFIRM);
 283                 sleep_cfm_buf->ps_cfm_sleep.resp_ctrl =
 284                         cpu_to_le16(RESP_NEEDED);
 285         }
 286         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 287         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 288         adapter->tx_lock_flag = false;
 289         adapter->null_pkt_interval = 0;
 290         adapter->fw_bands = 0;
 291         adapter->config_bands = 0;
 292         adapter->adhoc_start_band = 0;
 293         adapter->scan_channels = NULL;
 294         adapter->fw_release_number = 0;
 295         adapter->fw_cap_info = 0;
 296         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 297         adapter->event_cause = 0;
 298         adapter->region_code = 0;
 299         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 300         adapter->adhoc_awake_period = 0;
 301         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 302         adapter->arp_filter_size = 0;
 303
 304         return;
 305 }
 306
 307 /*
 308  * This function frees the adapter structure.
 309  *
 310  * The freeing operation is done recursively, by canceling all
 311  * pending commands, freeing the member buffers previously
 312  * allocated (command buffers, scan table buffer, sleep confirm
 313  * command buffer), stopping the timers and calling the cleanup
 314  * routines for every interface, before the actual adapter
 315  * structure is freed.
 316  */
 317 static void
 318 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 319 {
 320         if (!adapter) {
 321                 pr_err("%s: adapter is NULL\n", __func__);
 322                 return;
 323         }
 324
 325         mwifiex_cancel_all_pending_cmd(adapter);
 326
 327         /* Free lock variables */
 328         mwifiex_free_lock_list(adapter);
 329
 330         /* Free command buffer */
 331         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 332         mwifiex_free_cmd_buffer(adapter);
 333
 334         del_timer(&adapter->cmd_timer);
 335
 336         dev_dbg(adapter->dev, "info: free scan table\n");
 337         kfree(adapter->scan_table);
 338         adapter->scan_table = NULL;
 339
 340         adapter->if_ops.cleanup_if(adapter);
 341
 342         dev_kfree_skb_any(adapter->sleep_cfm);
 343
 344         return;
 345 }
 346
 347 /*
 348  *  This function intializes the lock variables and
 349  *  the list heads.
 350  */
 351 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 352 {
 353         struct mwifiex_private   *priv = NULL;
 354         s32           i = 0;
 355         u32           j = 0;
 356
 357         spin_lock_init(&adapter->mwifiex_lock);
 358         spin_lock_init(&adapter->int_lock);
 359         spin_lock_init(&adapter->main_proc_lock);
 360         spin_lock_init(&adapter->mwifiex_cmd_lock);
 361         for (i = 0; i < adapter->priv_num; i++) {
 362                 if (adapter->priv[i]) {
 363                         priv = adapter->priv[i];
 364                         spin_lock_init(&priv->rx_pkt_lock);
 365                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 366                         spin_lock_init(&priv->curr_bcn_buf_lock);
 367                 }
 368         }
 369
 370         /* Initialize cmd_free_q */
 371         INIT_LIST_HEAD(&adapter->cmd_free_q);
 372         /* Initialize cmd_pending_q */
 373         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 374         /* Initialize scan_pending_q */
 375         INIT_LIST_HEAD(&adapter->scan_pending_q);
 376
 377         spin_lock_init(&adapter->cmd_free_q_lock);
 378         spin_lock_init(&adapter->cmd_pending_q_lock);
 379         spin_lock_init(&adapter->scan_pending_q_lock);
 380
 381         for (i = 0; i < adapter->priv_num; ++i) {
 382                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 383                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 384                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 385         }
 386
 387         for (i = 0; i < adapter->priv_num; i++) {
 388                 if (!adapter->priv[i])
 389                         continue;
 390                 priv = adapter->priv[i];
 391                 for (j = 0; j < MAX_NUM_TID; ++j) {
 392                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 393                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 394                 }
 395                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 396                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 397
 398                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 399                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 400         }
 401
 402         return 0;
 403 }
 404
 405 /*
 406  *  This function releases the lock variables and frees the locks and
 407  *  associated locks.
 408  */
 409 void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 410 {
 411         struct mwifiex_private *priv = NULL;
 412         s32           i = 0;
 413         s32           j = 0;
 414
 415         /* Free lists */
 416         list_del(&adapter->cmd_free_q);
 417         list_del(&adapter->cmd_pending_q);
 418         list_del(&adapter->scan_pending_q);
 419
 420         for (i = 0; i < adapter->priv_num; i++)
 421                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 422
 423         for (i = 0; i < adapter->priv_num; i++) {
 424                 if (adapter->priv[i]) {
 425                         priv = adapter->priv[i];
 426                         for (j = 0; j < MAX_NUM_TID; ++j)
 427                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 428                         list_del(&priv->tx_ba_stream_tbl_ptr);
 429                         list_del(&priv->rx_reorder_tbl_ptr);
 430                 }
 431         }
 432
 433         return;
 434 }
 435
 436 /*
 437  * This function initializes the firmware.
 438  *
 439  * The following operations are performed sequentially -
 440  *      - Allocate adapter structure
 441  *      - Initialize the adapter structure
 442  *      - Initialize the private structure
 443  *      - Add BSS priority tables to the adapter structure
 444  *      - For each interface, send the init commands to firmware
 445  *      - Send the first command in command pending queue, if available
 446  */
 447 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 448 {
 449         int ret = 0;
 450         struct mwifiex_private *priv = NULL;
 451         u8 i = 0;
 452         u8 first_sta = true;
 453         int is_cmd_pend_q_empty;
 454         unsigned long flags;
 455
 456         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 457
 458         /* Allocate memory for member of adapter structure */
 459         ret = mwifiex_allocate_adapter(adapter);
 460         if (ret)
 461                 return -1;
 462
 463         /* Initialize adapter structure */
 464         mwifiex_init_adapter(adapter);
 465
 466         for (i = 0; i < adapter->priv_num; i++) {
 467                 if (adapter->priv[i]) {
 468                         priv = adapter->priv[i];
 469
 470                         /* Initialize private structure */
 471                         ret = mwifiex_init_priv(priv);
 472                         if (ret)
 473                                 return -1;
 474                 }
 475         }
 476         for (i = 0; i < adapter->priv_num; i++) {
 477                 if (adapter->priv[i]) {
 478                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 479                         if (ret == -1)
 480                                 return -1;
 481
 482                         first_sta = false;
 483                 }
 484         }
 485
 486         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 487         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 488         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 489         if (!is_cmd_pend_q_empty) {
 490                 /* Send the first command in queue and return */
 491                 if (mwifiex_main_process(adapter) != -1)
 492                         ret = -EINPROGRESS;
 493         } else {
 494                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 495         }
 496
 497         return ret;
 498 }
 499
 500 /*
 501  * This function deletes the BSS priority tables.
 502  *
 503  * The function traverses through all the allocated BSS priority nodes
 504  * in every BSS priority table and frees them.
 505  */
 506 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 507 {
 508         int i;
 509         struct mwifiex_adapter *adapter = priv->adapter;
 510         struct mwifiex_bss_prio_node *bssprio_node = NULL, *tmp_node = NULL,
 511                                                                 **cur = NULL;
 512         struct list_head *head;
 513         spinlock_t *lock;
 514         unsigned long flags;
 515
 516         for (i = 0; i < adapter->priv_num; ++i) {
 517                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 518                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 519                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 520                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 521                                 " index = %d, i = %d, head = %p, cur = %p\n",
 522                               priv->bss_index, i, head, *cur);
 523                 if (*cur) {
 524                         spin_lock_irqsave(lock, flags);
 525                         if (list_empty(head)) {
 526                                 spin_unlock_irqrestore(lock, flags);
 527                                 continue;
 528                         }
 529                         bssprio_node = list_first_entry(head,
 530                                         struct mwifiex_bss_prio_node, list);
 531                         spin_unlock_irqrestore(lock, flags);
 532
 533                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 534                                                  list) {
 535                                 if (bssprio_node->priv == priv) {
 536                                         dev_dbg(adapter->dev, "info: Delete "
 537                                                 "node %p, next = %p\n",
 538                                                 bssprio_node, tmp_node);
 539                                         spin_lock_irqsave(lock, flags);
 540                                         list_del(&bssprio_node->list);
 541                                         spin_unlock_irqrestore(lock, flags);
 542                                         kfree(bssprio_node);
 543                                 }
 544                         }
 545                         *cur = (struct mwifiex_bss_prio_node *)head;
 546                 }
 547         }
 548 }
 549
 550 /*
 551  * This function is used to shutdown the driver.
 552  *
 553  * The following operations are performed sequentially -
 554  *      - Check if already shut down
 555  *      - Make sure the main process has stopped
 556  *      - Clean up the Tx and Rx queues
 557  *      - Delete BSS priority tables
 558  *      - Free the adapter
 559  *      - Notify completion
 560  */
 561 int
 562 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 563 {
 564         int ret = -EINPROGRESS;
 565         struct mwifiex_private *priv = NULL;
 566         s32 i = 0;
 567         unsigned long flags;
 568
 569         /* mwifiex already shutdown */
 570         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 571                 return 0;
 572
 573         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 574         /* wait for mwifiex_process to complete */
 575         if (adapter->mwifiex_processing) {
 576                 dev_warn(adapter->dev, "main process is still running\n");
 577                 return ret;
 578         }
 579
 580         /* shut down mwifiex */
 581         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 582
 583         /* Clean up Tx/Rx queues and delete BSS priority table */
 584         for (i = 0; i < adapter->priv_num; i++) {
 585                 if (adapter->priv[i]) {
 586                         priv = adapter->priv[i];
 587
 588                         mwifiex_clean_txrx(priv);
 589                         mwifiex_delete_bss_prio_tbl(priv);
 590                 }
 591         }
 592
 593         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 594
 595         /* Free adapter structure */
 596         mwifiex_free_adapter(adapter);
 597
 598         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 599
 600         /* Notify completion */
 601         ret = mwifiex_shutdown_fw_complete(adapter);
 602
 603         return ret;
 604 }
 605
 606 /*
 607  * This function downloads the firmware to the card.
 608  *
 609  * The actual download is preceded by two sanity checks -
 610  *      - Check if firmware is already running
 611  *      - Check if the interface is the winner to download the firmware
 612  *
 613  * ...and followed by another -
 614  *      - Check if the firmware is downloaded successfully
 615  *
 616  * After download is successfully completed, the host interrupts are enabled.
 617  */
 618 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 619                     struct mwifiex_fw_image *pmfw)
 620 {
 621         int ret = 0;
 622         u32 poll_num = 1;
 623         int winner;
 624
 625         /* Check if firmware is already running */
 626         ret = adapter->if_ops.check_fw_status(adapter, poll_num, &winner);
 627         if (!ret) {
 628                 dev_notice(adapter->dev,
 629                                 "WLAN FW already running! Skip FW download\n");
 630                 goto done;
 631         }
 632         poll_num = MAX_FIRMWARE_POLL_TRIES;
 633
 634         /* Check if we are the winner for downloading FW */
 635         if (!winner) {
 636                 dev_notice(adapter->dev,
 637                                 "Other interface already running!"
 638                                 " Skip FW download\n");
 639                 poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 640                 goto poll_fw;
 641         }
 642         if (pmfw) {
 643                 /* Download firmware with helper */
 644                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 645                 if (ret) {
 646                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 647                         return ret;
 648                 }
 649         }
 650
 651 poll_fw:
 652         /* Check if the firmware is downloaded successfully or not */
 653         ret = adapter->if_ops.check_fw_status(adapter, poll_num, NULL);
 654         if (ret) {
 655                 dev_err(adapter->dev, "FW failed to be active in time\n");
 656                 return -1;
 657         }
 658 done:
 659         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 660         adapter->if_ops.enable_int(adapter);
 661         return ret;
 662 }