Pileus Git - ~andy/linux/blob - 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         struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
  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 -ENOMEM;
  46         }
  47
  48         bss_prio->priv = priv;
  49         INIT_LIST_HEAD(&bss_prio->list);
  50         if (!tbl[priv->bss_priority].bss_prio_cur)
  51                 tbl[priv->bss_priority].bss_prio_cur = bss_prio;
  52
  53         spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags);
  54         list_add_tail(&bss_prio->list, &tbl[priv->bss_priority].bss_prio_head);
  55         spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags);
  56
  57         return 0;
  58 }
  59
  60 /*
  61  * This function initializes the private structure and sets default
  62  * values to the members.
  63  *
  64  * Additionally, it also initializes all the locks and sets up all the
  65  * lists.
  66  */
  67 static int mwifiex_init_priv(struct mwifiex_private *priv)
  68 {
  69         u32 i;
  70
  71         priv->media_connected = false;
  72         memset(priv->curr_addr, 0xff, ETH_ALEN);
  73
  74         priv->pkt_tx_ctrl = 0;
  75         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
  76         priv->data_rate = 0;    /* Initially indicate the rate as auto */
  77         priv->is_data_rate_auto = true;
  78         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
  79         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
  80
  81         priv->sec_info.wep_enabled = 0;
  82         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
  83         priv->sec_info.encryption_mode = 0;
  84         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
  85                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
  86         priv->wep_key_curr_index = 0;
  87         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
  88                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
  89
  90         priv->beacon_period = 100; /* beacon interval */ ;
  91         priv->attempted_bss_desc = NULL;
  92         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
  93         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
  94
  95         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
  96         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
  97         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
  98         priv->assoc_rsp_size = 0;
  99         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
 100         priv->atim_window = 0;
 101         priv->adhoc_state = ADHOC_IDLE;
 102         priv->tx_power_level = 0;
 103         priv->max_tx_power_level = 0;
 104         priv->min_tx_power_level = 0;
 105         priv->tx_rate = 0;
 106         priv->rxpd_htinfo = 0;
 107         priv->rxpd_rate = 0;
 108         priv->rate_bitmap = 0;
 109         priv->data_rssi_last = 0;
 110         priv->data_rssi_avg = 0;
 111         priv->data_nf_avg = 0;
 112         priv->data_nf_last = 0;
 113         priv->bcn_rssi_last = 0;
 114         priv->bcn_rssi_avg = 0;
 115         priv->bcn_nf_avg = 0;
 116         priv->bcn_nf_last = 0;
 117         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
 118         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
 119         priv->wpa_ie_len = 0;
 120         priv->wpa_is_gtk_set = false;
 121
 122         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
 123         priv->assoc_tlv_buf_len = 0;
 124         memset(&priv->wps, 0, sizeof(priv->wps));
 125         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
 126         priv->gen_ie_buf_len = 0;
 127         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
 128
 129         priv->wmm_required = true;
 130         priv->wmm_enabled = false;
 131         priv->wmm_qosinfo = 0;
 132         priv->curr_bcn_buf = NULL;
 133         priv->curr_bcn_size = 0;
 134         priv->wps_ie = NULL;
 135         priv->wps_ie_len = 0;
 136
 137         priv->scan_block = false;
 138
 139         return mwifiex_add_bss_prio_tbl(priv);
 140 }
 141
 142 /*
 143  * This function allocates buffers for members of the adapter
 144  * structure.
 145  *
 146  * The memory allocated includes scan table, command buffers, and
 147  * sleep confirm command buffer. In addition, the queues are
 148  * also initialized.
 149  */
 150 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
 151 {
 152         int ret;
 153
 154         /* Allocate command buffer */
 155         ret = mwifiex_alloc_cmd_buffer(adapter);
 156         if (ret) {
 157                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
 158                         __func__);
 159                 return -1;
 160         }
 161
 162         adapter->sleep_cfm =
 163                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
 164                               + INTF_HEADER_LEN);
 165
 166         if (!adapter->sleep_cfm) {
 167                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
 168                         " cmd buffer\n", __func__);
 169                 return -1;
 170         }
 171         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
 172
 173         return 0;
 174 }
 175
 176 /*
 177  * This function initializes the adapter structure and sets default
 178  * values to the members of adapter.
 179  *
 180  * This also initializes the WMM related parameters in the driver private
 181  * structures.
 182  */
 183 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 184 {
 185         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
 186
 187         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
 188
 189         adapter->cmd_sent = false;
 190
 191         if (adapter->iface_type == MWIFIEX_SDIO)
 192                 adapter->data_sent = true;
 193         else
 194                 adapter->data_sent = false;
 195
 196         adapter->cmd_resp_received = false;
 197         adapter->event_received = false;
 198         adapter->data_received = false;
 199
 200         adapter->surprise_removed = false;
 201
 202         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 203
 204         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
 205         adapter->ps_state = PS_STATE_AWAKE;
 206         adapter->need_to_wakeup = false;
 207
 208         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
 209         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
 210         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
 211         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
 212
 213         adapter->scan_probes = 1;
 214
 215         adapter->multiple_dtim = 1;
 216
 217         adapter->local_listen_interval = 0;     /* default value in firmware
 218                                                    will be used */
 219
 220         adapter->is_deep_sleep = false;
 221
 222         adapter->delay_null_pkt = false;
 223         adapter->delay_to_ps = 1000;
 224         adapter->enhanced_ps_mode = PS_MODE_AUTO;
 225
 226         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
 227                                            default */
 228         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
 229                                            default */
 230         adapter->pm_wakeup_card_req = false;
 231
 232         adapter->pm_wakeup_fw_try = false;
 233
 234         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 235         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 236         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
 237
 238         adapter->is_hs_configured = false;
 239         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
 240         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
 241         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
 242         adapter->hs_activated = false;
 243
 244         memset(adapter->event_body, 0, sizeof(adapter->event_body));
 245         adapter->hw_dot_11n_dev_cap = 0;
 246         adapter->hw_dev_mcs_support = 0;
 247         adapter->sec_chan_offset = 0;
 248         adapter->adhoc_11n_enabled = false;
 249
 250         mwifiex_wmm_init(adapter);
 251
 252         if (adapter->sleep_cfm) {
 253                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
 254                                                 adapter->sleep_cfm->data;
 255                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
 256                 sleep_cfm_buf->command =
 257                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
 258                 sleep_cfm_buf->size =
 259                                 cpu_to_le16(adapter->sleep_cfm->len);
 260                 sleep_cfm_buf->result = 0;
 261                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
 262                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
 263         }
 264         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
 265         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
 266         adapter->tx_lock_flag = false;
 267         adapter->null_pkt_interval = 0;
 268         adapter->fw_bands = 0;
 269         adapter->config_bands = 0;
 270         adapter->adhoc_start_band = 0;
 271         adapter->scan_channels = NULL;
 272         adapter->fw_release_number = 0;
 273         adapter->fw_cap_info = 0;
 274         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
 275         adapter->event_cause = 0;
 276         adapter->region_code = 0;
 277         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
 278         adapter->adhoc_awake_period = 0;
 279         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
 280         adapter->arp_filter_size = 0;
 281         adapter->channel_type = NL80211_CHAN_HT20;
 282 }
 283
 284 /*
 285  * This function sets trans_start per tx_queue
 286  */
 287 void mwifiex_set_trans_start(struct net_device *dev)
 288 {
 289         int i;
 290
 291         for (i = 0; i < dev->num_tx_queues; i++)
 292                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
 293
 294         dev->trans_start = jiffies;
 295 }
 296
 297 /*
 298  * This function wakes up all queues in net_device
 299  */
 300 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
 301                                         struct mwifiex_adapter *adapter)
 302 {
 303         unsigned long dev_queue_flags;
 304
 305         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 306         netif_tx_wake_all_queues(netdev);
 307         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 308 }
 309
 310 /*
 311  * This function stops all queues in net_device
 312  */
 313 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
 314                                         struct mwifiex_adapter *adapter)
 315 {
 316         unsigned long dev_queue_flags;
 317
 318         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
 319         netif_tx_stop_all_queues(netdev);
 320         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
 321 }
 322
 323 /*
 324  *  This function releases the lock variables and frees the locks and
 325  *  associated locks.
 326  */
 327 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
 328 {
 329         struct mwifiex_private *priv;
 330         s32 i, j;
 331
 332         /* Free lists */
 333         list_del(&adapter->cmd_free_q);
 334         list_del(&adapter->cmd_pending_q);
 335         list_del(&adapter->scan_pending_q);
 336
 337         for (i = 0; i < adapter->priv_num; i++)
 338                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
 339
 340         for (i = 0; i < adapter->priv_num; i++) {
 341                 if (adapter->priv[i]) {
 342                         priv = adapter->priv[i];
 343                         for (j = 0; j < MAX_NUM_TID; ++j)
 344                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
 345                         list_del(&priv->tx_ba_stream_tbl_ptr);
 346                         list_del(&priv->rx_reorder_tbl_ptr);
 347                 }
 348         }
 349 }
 350
 351 /*
 352  * This function frees the adapter structure.
 353  *
 354  * The freeing operation is done recursively, by canceling all
 355  * pending commands, freeing the member buffers previously
 356  * allocated (command buffers, scan table buffer, sleep confirm
 357  * command buffer), stopping the timers and calling the cleanup
 358  * routines for every interface, before the actual adapter
 359  * structure is freed.
 360  */
 361 static void
 362 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
 363 {
 364         if (!adapter) {
 365                 pr_err("%s: adapter is NULL\n", __func__);
 366                 return;
 367         }
 368
 369         mwifiex_cancel_all_pending_cmd(adapter);
 370
 371         /* Free lock variables */
 372         mwifiex_free_lock_list(adapter);
 373
 374         /* Free command buffer */
 375         dev_dbg(adapter->dev, "info: free cmd buffer\n");
 376         mwifiex_free_cmd_buffer(adapter);
 377
 378         del_timer(&adapter->cmd_timer);
 379
 380         dev_dbg(adapter->dev, "info: free scan table\n");
 381
 382         if (adapter->if_ops.cleanup_if)
 383                 adapter->if_ops.cleanup_if(adapter);
 384
 385         if (adapter->sleep_cfm)
 386                 dev_kfree_skb_any(adapter->sleep_cfm);
 387 }
 388
 389 /*
 390  *  This function intializes the lock variables and
 391  *  the list heads.
 392  */
 393 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 394 {
 395         struct mwifiex_private *priv;
 396         s32 i, j;
 397
 398         spin_lock_init(&adapter->mwifiex_lock);
 399         spin_lock_init(&adapter->int_lock);
 400         spin_lock_init(&adapter->main_proc_lock);
 401         spin_lock_init(&adapter->mwifiex_cmd_lock);
 402         spin_lock_init(&adapter->queue_lock);
 403         for (i = 0; i < adapter->priv_num; i++) {
 404                 if (adapter->priv[i]) {
 405                         priv = adapter->priv[i];
 406                         spin_lock_init(&priv->rx_pkt_lock);
 407                         spin_lock_init(&priv->wmm.ra_list_spinlock);
 408                         spin_lock_init(&priv->curr_bcn_buf_lock);
 409                 }
 410         }
 411
 412         /* Initialize cmd_free_q */
 413         INIT_LIST_HEAD(&adapter->cmd_free_q);
 414         /* Initialize cmd_pending_q */
 415         INIT_LIST_HEAD(&adapter->cmd_pending_q);
 416         /* Initialize scan_pending_q */
 417         INIT_LIST_HEAD(&adapter->scan_pending_q);
 418
 419         spin_lock_init(&adapter->cmd_free_q_lock);
 420         spin_lock_init(&adapter->cmd_pending_q_lock);
 421         spin_lock_init(&adapter->scan_pending_q_lock);
 422
 423         skb_queue_head_init(&adapter->usb_rx_data_q);
 424
 425         for (i = 0; i < adapter->priv_num; ++i) {
 426                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
 427                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
 428                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
 429         }
 430
 431         for (i = 0; i < adapter->priv_num; i++) {
 432                 if (!adapter->priv[i])
 433                         continue;
 434                 priv = adapter->priv[i];
 435                 for (j = 0; j < MAX_NUM_TID; ++j) {
 436                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
 437                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
 438                 }
 439                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
 440                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
 441
 442                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
 443                 spin_lock_init(&priv->rx_reorder_tbl_lock);
 444         }
 445
 446         return 0;
 447 }
 448
 449 /*
 450  * This function initializes the firmware.
 451  *
 452  * The following operations are performed sequentially -
 453  *      - Allocate adapter structure
 454  *      - Initialize the adapter structure
 455  *      - Initialize the private structure
 456  *      - Add BSS priority tables to the adapter structure
 457  *      - For each interface, send the init commands to firmware
 458  *      - Send the first command in command pending queue, if available
 459  */
 460 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
 461 {
 462         int ret;
 463         struct mwifiex_private *priv;
 464         u8 i, first_sta = true;
 465         int is_cmd_pend_q_empty;
 466         unsigned long flags;
 467
 468         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
 469
 470         /* Allocate memory for member of adapter structure */
 471         ret = mwifiex_allocate_adapter(adapter);
 472         if (ret)
 473                 return -1;
 474
 475         /* Initialize adapter structure */
 476         mwifiex_init_adapter(adapter);
 477
 478         for (i = 0; i < adapter->priv_num; i++) {
 479                 if (adapter->priv[i]) {
 480                         priv = adapter->priv[i];
 481
 482                         /* Initialize private structure */
 483                         ret = mwifiex_init_priv(priv);
 484                         if (ret)
 485                                 return -1;
 486                 }
 487         }
 488         for (i = 0; i < adapter->priv_num; i++) {
 489                 if (adapter->priv[i]) {
 490                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
 491                         if (ret == -1)
 492                                 return -1;
 493
 494                         first_sta = false;
 495                 }
 496         }
 497
 498         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
 499         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
 500         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
 501         if (!is_cmd_pend_q_empty) {
 502                 /* Send the first command in queue and return */
 503                 if (mwifiex_main_process(adapter) != -1)
 504                         ret = -EINPROGRESS;
 505         } else {
 506                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
 507         }
 508
 509         return ret;
 510 }
 511
 512 /*
 513  * This function deletes the BSS priority tables.
 514  *
 515  * The function traverses through all the allocated BSS priority nodes
 516  * in every BSS priority table and frees them.
 517  */
 518 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
 519 {
 520         int i;
 521         struct mwifiex_adapter *adapter = priv->adapter;
 522         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
 523         struct list_head *head;
 524         spinlock_t *lock; /* bss priority lock */
 525         unsigned long flags;
 526
 527         for (i = 0; i < adapter->priv_num; ++i) {
 528                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
 529                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
 530                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
 531                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
 532                                 " bss_type = %d, bss_num = %d, i = %d,"
 533                                 " head = %p, cur = %p\n",
 534                               priv->bss_type, priv->bss_num, i, head, *cur);
 535                 if (*cur) {
 536                         spin_lock_irqsave(lock, flags);
 537                         if (list_empty(head)) {
 538                                 spin_unlock_irqrestore(lock, flags);
 539                                 continue;
 540                         }
 541                         bssprio_node = list_first_entry(head,
 542                                         struct mwifiex_bss_prio_node, list);
 543                         spin_unlock_irqrestore(lock, flags);
 544
 545                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
 546                                                  list) {
 547                                 if (bssprio_node->priv == priv) {
 548                                         dev_dbg(adapter->dev, "info: Delete "
 549                                                 "node %p, next = %p\n",
 550                                                 bssprio_node, tmp_node);
 551                                         spin_lock_irqsave(lock, flags);
 552                                         list_del(&bssprio_node->list);
 553                                         spin_unlock_irqrestore(lock, flags);
 554                                         kfree(bssprio_node);
 555                                 }
 556                         }
 557                         *cur = (struct mwifiex_bss_prio_node *)head;
 558                 }
 559         }
 560 }
 561
 562 /*
 563  * This function is used to shutdown the driver.
 564  *
 565  * The following operations are performed sequentially -
 566  *      - Check if already shut down
 567  *      - Make sure the main process has stopped
 568  *      - Clean up the Tx and Rx queues
 569  *      - Delete BSS priority tables
 570  *      - Free the adapter
 571  *      - Notify completion
 572  */
 573 int
 574 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
 575 {
 576         int ret = -EINPROGRESS;
 577         struct mwifiex_private *priv;
 578         s32 i;
 579         unsigned long flags;
 580         struct sk_buff *skb;
 581
 582         /* mwifiex already shutdown */
 583         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
 584                 return 0;
 585
 586         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
 587         /* wait for mwifiex_process to complete */
 588         if (adapter->mwifiex_processing) {
 589                 dev_warn(adapter->dev, "main process is still running\n");
 590                 return ret;
 591         }
 592
 593         /* shut down mwifiex */
 594         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
 595
 596         /* Clean up Tx/Rx queues and delete BSS priority table */
 597         for (i = 0; i < adapter->priv_num; i++) {
 598                 if (adapter->priv[i]) {
 599                         priv = adapter->priv[i];
 600
 601                         mwifiex_clean_txrx(priv);
 602                         mwifiex_delete_bss_prio_tbl(priv);
 603                 }
 604         }
 605
 606         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
 607
 608         if (adapter->if_ops.data_complete) {
 609                 while ((skb = skb_dequeue(&adapter->usb_rx_data_q))) {
 610                         struct mwifiex_rxinfo *rx_info = MWIFIEX_SKB_RXCB(skb);
 611
 612                         priv = adapter->priv[rx_info->bss_num];
 613                         if (priv)
 614                                 priv->stats.rx_dropped++;
 615
 616                         adapter->if_ops.data_complete(adapter, skb);
 617                 }
 618         }
 619
 620         /* Free adapter structure */
 621         mwifiex_free_adapter(adapter);
 622
 623         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
 624
 625         /* Notify completion */
 626         ret = mwifiex_shutdown_fw_complete(adapter);
 627
 628         return ret;
 629 }
 630
 631 /*
 632  * This function downloads the firmware to the card.
 633  *
 634  * The actual download is preceded by two sanity checks -
 635  *      - Check if firmware is already running
 636  *      - Check if the interface is the winner to download the firmware
 637  *
 638  * ...and followed by another -
 639  *      - Check if the firmware is downloaded successfully
 640  *
 641  * After download is successfully completed, the host interrupts are enabled.
 642  */
 643 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
 644                     struct mwifiex_fw_image *pmfw)
 645 {
 646         int ret;
 647         u32 poll_num = 1;
 648
 649         if (adapter->if_ops.check_fw_status) {
 650                 adapter->winner = 0;
 651
 652                 /* check if firmware is already running */
 653                 ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 654                 if (!ret) {
 655                         dev_notice(adapter->dev,
 656                                    "WLAN FW already running! Skip FW dnld\n");
 657                         goto done;
 658                 }
 659
 660                 poll_num = MAX_FIRMWARE_POLL_TRIES;
 661
 662                 /* check if we are the winner for downloading FW */
 663                 if (!adapter->winner) {
 664                         dev_notice(adapter->dev,
 665                                    "FW already running! Skip FW dnld\n");
 666                         poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
 667                         goto poll_fw;
 668                 }
 669         }
 670
 671         if (pmfw) {
 672                 /* Download firmware with helper */
 673                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
 674                 if (ret) {
 675                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
 676                         return ret;
 677                 }
 678         }
 679
 680 poll_fw:
 681         /* Check if the firmware is downloaded successfully or not */
 682         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
 683         if (ret) {
 684                 dev_err(adapter->dev, "FW failed to be active in time\n");
 685                 return -1;
 686         }
 687 done:
 688         /* re-enable host interrupt for mwifiex after fw dnld is successful */
 689         if (adapter->if_ops.enable_int)
 690                 adapter->if_ops.enable_int(adapter);
 691
 692         return ret;
 693 }