Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
[linux-2.6.git] / 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 -ENOMEM;
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
75         priv->media_connected = false;
76         memset(priv->curr_addr, 0xff, ETH_ALEN);
77
78         priv->pkt_tx_ctrl = 0;
79         priv->bss_mode = NL80211_IFTYPE_UNSPECIFIED;
80         priv->data_rate = 0;    /* Initially indicate the rate as auto */
81         priv->is_data_rate_auto = true;
82         priv->bcn_avg_factor = DEFAULT_BCN_AVG_FACTOR;
83         priv->data_avg_factor = DEFAULT_DATA_AVG_FACTOR;
84
85         priv->sec_info.wep_status = MWIFIEX_802_11_WEP_DISABLED;
86         priv->sec_info.authentication_mode = NL80211_AUTHTYPE_OPEN_SYSTEM;
87         priv->sec_info.encryption_mode = 0;
88         for (i = 0; i < ARRAY_SIZE(priv->wep_key); i++)
89                 memset(&priv->wep_key[i], 0, sizeof(struct mwifiex_wep_key));
90         priv->wep_key_curr_index = 0;
91         priv->curr_pkt_filter = HostCmd_ACT_MAC_RX_ON | HostCmd_ACT_MAC_TX_ON |
92                                 HostCmd_ACT_MAC_ETHERNETII_ENABLE;
93
94         priv->beacon_period = 100; /* beacon interval */ ;
95         priv->attempted_bss_desc = NULL;
96         memset(&priv->curr_bss_params, 0, sizeof(priv->curr_bss_params));
97         priv->listen_interval = MWIFIEX_DEFAULT_LISTEN_INTERVAL;
98
99         memset(&priv->prev_ssid, 0, sizeof(priv->prev_ssid));
100         memset(&priv->prev_bssid, 0, sizeof(priv->prev_bssid));
101         memset(&priv->assoc_rsp_buf, 0, sizeof(priv->assoc_rsp_buf));
102         priv->assoc_rsp_size = 0;
103         priv->adhoc_channel = DEFAULT_AD_HOC_CHANNEL;
104         priv->atim_window = 0;
105         priv->adhoc_state = ADHOC_IDLE;
106         priv->tx_power_level = 0;
107         priv->max_tx_power_level = 0;
108         priv->min_tx_power_level = 0;
109         priv->tx_rate = 0;
110         priv->rxpd_htinfo = 0;
111         priv->rxpd_rate = 0;
112         priv->rate_bitmap = 0;
113         priv->data_rssi_last = 0;
114         priv->data_rssi_avg = 0;
115         priv->data_nf_avg = 0;
116         priv->data_nf_last = 0;
117         priv->bcn_rssi_last = 0;
118         priv->bcn_rssi_avg = 0;
119         priv->bcn_nf_avg = 0;
120         priv->bcn_nf_last = 0;
121         memset(&priv->wpa_ie, 0, sizeof(priv->wpa_ie));
122         memset(&priv->aes_key, 0, sizeof(priv->aes_key));
123         priv->wpa_ie_len = 0;
124         priv->wpa_is_gtk_set = false;
125
126         memset(&priv->assoc_tlv_buf, 0, sizeof(priv->assoc_tlv_buf));
127         priv->assoc_tlv_buf_len = 0;
128         memset(&priv->wps, 0, sizeof(priv->wps));
129         memset(&priv->gen_ie_buf, 0, sizeof(priv->gen_ie_buf));
130         priv->gen_ie_buf_len = 0;
131         memset(priv->vs_ie, 0, sizeof(priv->vs_ie));
132
133         priv->wmm_required = true;
134         priv->wmm_enabled = false;
135         priv->wmm_qosinfo = 0;
136         priv->curr_bcn_buf = NULL;
137         priv->curr_bcn_size = 0;
138
139         priv->scan_block = false;
140
141         return mwifiex_add_bss_prio_tbl(priv);
142 }
143
144 /*
145  * This function allocates buffers for members of the adapter
146  * structure.
147  *
148  * The memory allocated includes scan table, command buffers, and
149  * sleep confirm command buffer. In addition, the queues are
150  * also initialized.
151  */
152 static int mwifiex_allocate_adapter(struct mwifiex_adapter *adapter)
153 {
154         int ret;
155
156         /* Allocate command buffer */
157         ret = mwifiex_alloc_cmd_buffer(adapter);
158         if (ret) {
159                 dev_err(adapter->dev, "%s: failed to alloc cmd buffer\n",
160                        __func__);
161                 return -1;
162         }
163
164         adapter->sleep_cfm =
165                 dev_alloc_skb(sizeof(struct mwifiex_opt_sleep_confirm)
166                                 + INTF_HEADER_LEN);
167
168         if (!adapter->sleep_cfm) {
169                 dev_err(adapter->dev, "%s: failed to alloc sleep cfm"
170                         " cmd buffer\n", __func__);
171                 return -1;
172         }
173         skb_reserve(adapter->sleep_cfm, INTF_HEADER_LEN);
174
175         return 0;
176 }
177
178 /*
179  * This function initializes the adapter structure and sets default
180  * values to the members of adapter.
181  *
182  * This also initializes the WMM related parameters in the driver private
183  * structures.
184  */
185 static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
186 {
187         struct mwifiex_opt_sleep_confirm *sleep_cfm_buf = NULL;
188
189         skb_put(adapter->sleep_cfm, sizeof(struct mwifiex_opt_sleep_confirm));
190
191         adapter->cmd_sent = false;
192
193         if (adapter->iface_type == MWIFIEX_PCIE)
194                 adapter->data_sent = false;
195         else
196                 adapter->data_sent = true;
197
198         adapter->cmd_resp_received = false;
199         adapter->event_received = false;
200         adapter->data_received = false;
201
202         adapter->surprise_removed = false;
203
204         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
205
206         adapter->ps_mode = MWIFIEX_802_11_POWER_MODE_CAM;
207         adapter->ps_state = PS_STATE_AWAKE;
208         adapter->need_to_wakeup = false;
209
210         adapter->scan_mode = HostCmd_BSS_MODE_ANY;
211         adapter->specific_scan_time = MWIFIEX_SPECIFIC_SCAN_CHAN_TIME;
212         adapter->active_scan_time = MWIFIEX_ACTIVE_SCAN_CHAN_TIME;
213         adapter->passive_scan_time = MWIFIEX_PASSIVE_SCAN_CHAN_TIME;
214
215         adapter->scan_probes = 1;
216
217         adapter->multiple_dtim = 1;
218
219         adapter->local_listen_interval = 0;     /* default value in firmware
220                                                    will be used */
221
222         adapter->is_deep_sleep = false;
223
224         adapter->delay_null_pkt = false;
225         adapter->delay_to_ps = 1000;
226         adapter->enhanced_ps_mode = PS_MODE_AUTO;
227
228         adapter->gen_null_pkt = false;  /* Disable NULL Pkg generation by
229                                            default */
230         adapter->pps_uapsd_mode = false; /* Disable pps/uapsd mode by
231                                            default */
232         adapter->pm_wakeup_card_req = false;
233
234         adapter->pm_wakeup_fw_try = false;
235
236         adapter->max_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
237         adapter->tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
238         adapter->curr_tx_buf_size = MWIFIEX_TX_DATA_BUF_SIZE_2K;
239
240         adapter->is_hs_configured = false;
241         adapter->hs_cfg.conditions = cpu_to_le32(HOST_SLEEP_CFG_COND_DEF);
242         adapter->hs_cfg.gpio = HOST_SLEEP_CFG_GPIO_DEF;
243         adapter->hs_cfg.gap = HOST_SLEEP_CFG_GAP_DEF;
244         adapter->hs_activated = false;
245
246         memset(adapter->event_body, 0, sizeof(adapter->event_body));
247         adapter->hw_dot_11n_dev_cap = 0;
248         adapter->hw_dev_mcs_support = 0;
249         adapter->sec_chan_offset = 0;
250         adapter->adhoc_11n_enabled = false;
251
252         mwifiex_wmm_init(adapter);
253
254         if (adapter->sleep_cfm) {
255                 sleep_cfm_buf = (struct mwifiex_opt_sleep_confirm *)
256                                                 adapter->sleep_cfm->data;
257                 memset(sleep_cfm_buf, 0, adapter->sleep_cfm->len);
258                 sleep_cfm_buf->command =
259                                 cpu_to_le16(HostCmd_CMD_802_11_PS_MODE_ENH);
260                 sleep_cfm_buf->size =
261                                 cpu_to_le16(adapter->sleep_cfm->len);
262                 sleep_cfm_buf->result = 0;
263                 sleep_cfm_buf->action = cpu_to_le16(SLEEP_CONFIRM);
264                 sleep_cfm_buf->resp_ctrl = cpu_to_le16(RESP_NEEDED);
265         }
266         memset(&adapter->sleep_params, 0, sizeof(adapter->sleep_params));
267         memset(&adapter->sleep_period, 0, sizeof(adapter->sleep_period));
268         adapter->tx_lock_flag = false;
269         adapter->null_pkt_interval = 0;
270         adapter->fw_bands = 0;
271         adapter->config_bands = 0;
272         adapter->adhoc_start_band = 0;
273         adapter->scan_channels = NULL;
274         adapter->fw_release_number = 0;
275         adapter->fw_cap_info = 0;
276         memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));
277         adapter->event_cause = 0;
278         adapter->region_code = 0;
279         adapter->bcn_miss_time_out = DEFAULT_BCN_MISS_TIMEOUT;
280         adapter->adhoc_awake_period = 0;
281         memset(&adapter->arp_filter, 0, sizeof(adapter->arp_filter));
282         adapter->arp_filter_size = 0;
283         adapter->channel_type = NL80211_CHAN_HT20;
284 }
285
286 /*
287  * This function sets trans_start per tx_queue
288  */
289 void mwifiex_set_trans_start(struct net_device *dev)
290 {
291         int i;
292
293         for (i = 0; i < dev->num_tx_queues; i++)
294                 netdev_get_tx_queue(dev, i)->trans_start = jiffies;
295
296         dev->trans_start = jiffies;
297 }
298
299 /*
300  * This function wakes up all queues in net_device
301  */
302 void mwifiex_wake_up_net_dev_queue(struct net_device *netdev,
303                                         struct mwifiex_adapter *adapter)
304 {
305         unsigned long dev_queue_flags;
306
307         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
308         netif_tx_wake_all_queues(netdev);
309         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
310 }
311
312 /*
313  * This function stops all queues in net_device
314  */
315 void mwifiex_stop_net_dev_queue(struct net_device *netdev,
316                                         struct mwifiex_adapter *adapter)
317 {
318         unsigned long dev_queue_flags;
319
320         spin_lock_irqsave(&adapter->queue_lock, dev_queue_flags);
321         netif_tx_stop_all_queues(netdev);
322         spin_unlock_irqrestore(&adapter->queue_lock, dev_queue_flags);
323 }
324
325 /*
326  *  This function releases the lock variables and frees the locks and
327  *  associated locks.
328  */
329 static void mwifiex_free_lock_list(struct mwifiex_adapter *adapter)
330 {
331         struct mwifiex_private *priv;
332         s32 i, j;
333
334         /* Free lists */
335         list_del(&adapter->cmd_free_q);
336         list_del(&adapter->cmd_pending_q);
337         list_del(&adapter->scan_pending_q);
338
339         for (i = 0; i < adapter->priv_num; i++)
340                 list_del(&adapter->bss_prio_tbl[i].bss_prio_head);
341
342         for (i = 0; i < adapter->priv_num; i++) {
343                 if (adapter->priv[i]) {
344                         priv = adapter->priv[i];
345                         for (j = 0; j < MAX_NUM_TID; ++j)
346                                 list_del(&priv->wmm.tid_tbl_ptr[j].ra_list);
347                         list_del(&priv->tx_ba_stream_tbl_ptr);
348                         list_del(&priv->rx_reorder_tbl_ptr);
349                 }
350         }
351 }
352
353 /*
354  * This function frees the adapter structure.
355  *
356  * The freeing operation is done recursively, by canceling all
357  * pending commands, freeing the member buffers previously
358  * allocated (command buffers, scan table buffer, sleep confirm
359  * command buffer), stopping the timers and calling the cleanup
360  * routines for every interface, before the actual adapter
361  * structure is freed.
362  */
363 static void
364 mwifiex_free_adapter(struct mwifiex_adapter *adapter)
365 {
366         if (!adapter) {
367                 pr_err("%s: adapter is NULL\n", __func__);
368                 return;
369         }
370
371         mwifiex_cancel_all_pending_cmd(adapter);
372
373         /* Free lock variables */
374         mwifiex_free_lock_list(adapter);
375
376         /* Free command buffer */
377         dev_dbg(adapter->dev, "info: free cmd buffer\n");
378         mwifiex_free_cmd_buffer(adapter);
379
380         del_timer(&adapter->cmd_timer);
381
382         dev_dbg(adapter->dev, "info: free scan table\n");
383
384         adapter->if_ops.cleanup_if(adapter);
385
386         if (adapter->sleep_cfm)
387                 dev_kfree_skb_any(adapter->sleep_cfm);
388 }
389
390 /*
391  *  This function intializes the lock variables and
392  *  the list heads.
393  */
394 int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
395 {
396         struct mwifiex_private *priv;
397         s32 i, j;
398
399         spin_lock_init(&adapter->mwifiex_lock);
400         spin_lock_init(&adapter->int_lock);
401         spin_lock_init(&adapter->main_proc_lock);
402         spin_lock_init(&adapter->mwifiex_cmd_lock);
403         spin_lock_init(&adapter->queue_lock);
404         for (i = 0; i < adapter->priv_num; i++) {
405                 if (adapter->priv[i]) {
406                         priv = adapter->priv[i];
407                         spin_lock_init(&priv->rx_pkt_lock);
408                         spin_lock_init(&priv->wmm.ra_list_spinlock);
409                         spin_lock_init(&priv->curr_bcn_buf_lock);
410                 }
411         }
412
413         /* Initialize cmd_free_q */
414         INIT_LIST_HEAD(&adapter->cmd_free_q);
415         /* Initialize cmd_pending_q */
416         INIT_LIST_HEAD(&adapter->cmd_pending_q);
417         /* Initialize scan_pending_q */
418         INIT_LIST_HEAD(&adapter->scan_pending_q);
419
420         spin_lock_init(&adapter->cmd_free_q_lock);
421         spin_lock_init(&adapter->cmd_pending_q_lock);
422         spin_lock_init(&adapter->scan_pending_q_lock);
423
424         for (i = 0; i < adapter->priv_num; ++i) {
425                 INIT_LIST_HEAD(&adapter->bss_prio_tbl[i].bss_prio_head);
426                 adapter->bss_prio_tbl[i].bss_prio_cur = NULL;
427                 spin_lock_init(&adapter->bss_prio_tbl[i].bss_prio_lock);
428         }
429
430         for (i = 0; i < adapter->priv_num; i++) {
431                 if (!adapter->priv[i])
432                         continue;
433                 priv = adapter->priv[i];
434                 for (j = 0; j < MAX_NUM_TID; ++j) {
435                         INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[j].ra_list);
436                         spin_lock_init(&priv->wmm.tid_tbl_ptr[j].tid_tbl_lock);
437                 }
438                 INIT_LIST_HEAD(&priv->tx_ba_stream_tbl_ptr);
439                 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
440
441                 spin_lock_init(&priv->tx_ba_stream_tbl_lock);
442                 spin_lock_init(&priv->rx_reorder_tbl_lock);
443         }
444
445         return 0;
446 }
447
448 /*
449  * This function initializes the firmware.
450  *
451  * The following operations are performed sequentially -
452  *      - Allocate adapter structure
453  *      - Initialize the adapter structure
454  *      - Initialize the private structure
455  *      - Add BSS priority tables to the adapter structure
456  *      - For each interface, send the init commands to firmware
457  *      - Send the first command in command pending queue, if available
458  */
459 int mwifiex_init_fw(struct mwifiex_adapter *adapter)
460 {
461         int ret;
462         struct mwifiex_private *priv;
463         u8 i, first_sta = true;
464         int is_cmd_pend_q_empty;
465         unsigned long flags;
466
467         adapter->hw_status = MWIFIEX_HW_STATUS_INITIALIZING;
468
469         /* Allocate memory for member of adapter structure */
470         ret = mwifiex_allocate_adapter(adapter);
471         if (ret)
472                 return -1;
473
474         /* Initialize adapter structure */
475         mwifiex_init_adapter(adapter);
476
477         for (i = 0; i < adapter->priv_num; i++) {
478                 if (adapter->priv[i]) {
479                         priv = adapter->priv[i];
480
481                         /* Initialize private structure */
482                         ret = mwifiex_init_priv(priv);
483                         if (ret)
484                                 return -1;
485                 }
486         }
487         for (i = 0; i < adapter->priv_num; i++) {
488                 if (adapter->priv[i]) {
489                         ret = mwifiex_sta_init_cmd(adapter->priv[i], first_sta);
490                         if (ret == -1)
491                                 return -1;
492
493                         first_sta = false;
494                 }
495         }
496
497         spin_lock_irqsave(&adapter->cmd_pending_q_lock, flags);
498         is_cmd_pend_q_empty = list_empty(&adapter->cmd_pending_q);
499         spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, flags);
500         if (!is_cmd_pend_q_empty) {
501                 /* Send the first command in queue and return */
502                 if (mwifiex_main_process(adapter) != -1)
503                         ret = -EINPROGRESS;
504         } else {
505                 adapter->hw_status = MWIFIEX_HW_STATUS_READY;
506         }
507
508         return ret;
509 }
510
511 /*
512  * This function deletes the BSS priority tables.
513  *
514  * The function traverses through all the allocated BSS priority nodes
515  * in every BSS priority table and frees them.
516  */
517 static void mwifiex_delete_bss_prio_tbl(struct mwifiex_private *priv)
518 {
519         int i;
520         struct mwifiex_adapter *adapter = priv->adapter;
521         struct mwifiex_bss_prio_node *bssprio_node, *tmp_node, **cur;
522         struct list_head *head;
523         spinlock_t *lock;
524         unsigned long flags;
525
526         for (i = 0; i < adapter->priv_num; ++i) {
527                 head = &adapter->bss_prio_tbl[i].bss_prio_head;
528                 cur = &adapter->bss_prio_tbl[i].bss_prio_cur;
529                 lock = &adapter->bss_prio_tbl[i].bss_prio_lock;
530                 dev_dbg(adapter->dev, "info: delete BSS priority table,"
531                                 " bss_type = %d, bss_num = %d, i = %d,"
532                                 " head = %p, cur = %p\n",
533                               priv->bss_type, priv->bss_num, i, head, *cur);
534                 if (*cur) {
535                         spin_lock_irqsave(lock, flags);
536                         if (list_empty(head)) {
537                                 spin_unlock_irqrestore(lock, flags);
538                                 continue;
539                         }
540                         bssprio_node = list_first_entry(head,
541                                         struct mwifiex_bss_prio_node, list);
542                         spin_unlock_irqrestore(lock, flags);
543
544                         list_for_each_entry_safe(bssprio_node, tmp_node, head,
545                                                  list) {
546                                 if (bssprio_node->priv == priv) {
547                                         dev_dbg(adapter->dev, "info: Delete "
548                                                 "node %p, next = %p\n",
549                                                 bssprio_node, tmp_node);
550                                         spin_lock_irqsave(lock, flags);
551                                         list_del(&bssprio_node->list);
552                                         spin_unlock_irqrestore(lock, flags);
553                                         kfree(bssprio_node);
554                                 }
555                         }
556                         *cur = (struct mwifiex_bss_prio_node *)head;
557                 }
558         }
559 }
560
561 /*
562  * This function is used to shutdown the driver.
563  *
564  * The following operations are performed sequentially -
565  *      - Check if already shut down
566  *      - Make sure the main process has stopped
567  *      - Clean up the Tx and Rx queues
568  *      - Delete BSS priority tables
569  *      - Free the adapter
570  *      - Notify completion
571  */
572 int
573 mwifiex_shutdown_drv(struct mwifiex_adapter *adapter)
574 {
575         int ret = -EINPROGRESS;
576         struct mwifiex_private *priv;
577         s32 i;
578         unsigned long flags;
579
580         /* mwifiex already shutdown */
581         if (adapter->hw_status == MWIFIEX_HW_STATUS_NOT_READY)
582                 return 0;
583
584         adapter->hw_status = MWIFIEX_HW_STATUS_CLOSING;
585         /* wait for mwifiex_process to complete */
586         if (adapter->mwifiex_processing) {
587                 dev_warn(adapter->dev, "main process is still running\n");
588                 return ret;
589         }
590
591         /* shut down mwifiex */
592         dev_dbg(adapter->dev, "info: shutdown mwifiex...\n");
593
594         /* Clean up Tx/Rx queues and delete BSS priority table */
595         for (i = 0; i < adapter->priv_num; i++) {
596                 if (adapter->priv[i]) {
597                         priv = adapter->priv[i];
598
599                         mwifiex_clean_txrx(priv);
600                         mwifiex_delete_bss_prio_tbl(priv);
601                 }
602         }
603
604         spin_lock_irqsave(&adapter->mwifiex_lock, flags);
605
606         /* Free adapter structure */
607         mwifiex_free_adapter(adapter);
608
609         spin_unlock_irqrestore(&adapter->mwifiex_lock, flags);
610
611         /* Notify completion */
612         ret = mwifiex_shutdown_fw_complete(adapter);
613
614         return ret;
615 }
616
617 /*
618  * This function downloads the firmware to the card.
619  *
620  * The actual download is preceded by two sanity checks -
621  *      - Check if firmware is already running
622  *      - Check if the interface is the winner to download the firmware
623  *
624  * ...and followed by another -
625  *      - Check if the firmware is downloaded successfully
626  *
627  * After download is successfully completed, the host interrupts are enabled.
628  */
629 int mwifiex_dnld_fw(struct mwifiex_adapter *adapter,
630                     struct mwifiex_fw_image *pmfw)
631 {
632         int ret;
633         u32 poll_num = 1;
634
635         adapter->winner = 0;
636
637         /* Check if firmware is already running */
638         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
639         if (!ret) {
640                 dev_notice(adapter->dev,
641                                 "WLAN FW already running! Skip FW download\n");
642                 goto done;
643         }
644         poll_num = MAX_FIRMWARE_POLL_TRIES;
645
646         /* Check if we are the winner for downloading FW */
647         if (!adapter->winner) {
648                 dev_notice(adapter->dev,
649                                 "Other interface already running!"
650                                 " Skip FW download\n");
651                 poll_num = MAX_MULTI_INTERFACE_POLL_TRIES;
652                 goto poll_fw;
653         }
654         if (pmfw) {
655                 /* Download firmware with helper */
656                 ret = adapter->if_ops.prog_fw(adapter, pmfw);
657                 if (ret) {
658                         dev_err(adapter->dev, "prog_fw failed ret=%#x\n", ret);
659                         return ret;
660                 }
661         }
662
663 poll_fw:
664         /* Check if the firmware is downloaded successfully or not */
665         ret = adapter->if_ops.check_fw_status(adapter, poll_num);
666         if (ret) {
667                 dev_err(adapter->dev, "FW failed to be active in time\n");
668                 return -1;
669         }
670 done:
671         /* re-enable host interrupt for mwifiex after fw dnld is successful */
672         adapter->if_ops.enable_int(adapter);
673         return ret;
674 }