Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[~shefty/rdma-dev.git] / drivers / net / wireless / libertas / main.c
1 /*
2  * This file contains the major functions in WLAN
3  * driver. It includes init, exit, open, close and main
4  * thread etc..
5  */
6
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9 #include <linux/module.h>
10 #include <linux/delay.h>
11 #include <linux/etherdevice.h>
12 #include <linux/hardirq.h>
13 #include <linux/netdevice.h>
14 #include <linux/if_arp.h>
15 #include <linux/kthread.h>
16 #include <linux/kfifo.h>
17 #include <linux/slab.h>
18 #include <net/cfg80211.h>
19
20 #include "host.h"
21 #include "decl.h"
22 #include "dev.h"
23 #include "cfg.h"
24 #include "debugfs.h"
25 #include "cmd.h"
26 #include "mesh.h"
27
28 #define DRIVER_RELEASE_VERSION "323.p0"
29 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
30 #ifdef  DEBUG
31     "-dbg"
32 #endif
33     "";
34
35
36 /* Module parameters */
37 unsigned int lbs_debug;
38 EXPORT_SYMBOL_GPL(lbs_debug);
39 module_param_named(libertas_debug, lbs_debug, int, 0644);
40
41 unsigned int lbs_disablemesh;
42 EXPORT_SYMBOL_GPL(lbs_disablemesh);
43 module_param_named(libertas_disablemesh, lbs_disablemesh, int, 0644);
44
45
46 /*
47  * This global structure is used to send the confirm_sleep command as
48  * fast as possible down to the firmware.
49  */
50 struct cmd_confirm_sleep confirm_sleep;
51
52
53 /*
54  * the table to keep region code
55  */
56 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
57     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
58
59 /*
60  * FW rate table.  FW refers to rates by their index in this table, not by the
61  * rate value itself.  Values of 0x00 are
62  * reserved positions.
63  */
64 static u8 fw_data_rates[MAX_RATES] =
65     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
66       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
67 };
68
69 /**
70  *  lbs_fw_index_to_data_rate - use index to get the data rate
71  *
72  *  @idx:       The index of data rate
73  *  returns:    data rate or 0
74  */
75 u32 lbs_fw_index_to_data_rate(u8 idx)
76 {
77         if (idx >= sizeof(fw_data_rates))
78                 idx = 0;
79         return fw_data_rates[idx];
80 }
81
82 /**
83  *  lbs_data_rate_to_fw_index - use rate to get the index
84  *
85  *  @rate:      data rate
86  *  returns:    index or 0
87  */
88 u8 lbs_data_rate_to_fw_index(u32 rate)
89 {
90         u8 i;
91
92         if (!rate)
93                 return 0;
94
95         for (i = 0; i < sizeof(fw_data_rates); i++) {
96                 if (rate == fw_data_rates[i])
97                         return i;
98         }
99         return 0;
100 }
101
102 int lbs_set_iface_type(struct lbs_private *priv, enum nl80211_iftype type)
103 {
104         int ret = 0;
105
106         switch (type) {
107         case NL80211_IFTYPE_MONITOR:
108                 ret = lbs_set_monitor_mode(priv, 1);
109                 break;
110         case NL80211_IFTYPE_STATION:
111                 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
112                         ret = lbs_set_monitor_mode(priv, 0);
113                 if (!ret)
114                         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 1);
115                 break;
116         case NL80211_IFTYPE_ADHOC:
117                 if (priv->wdev->iftype == NL80211_IFTYPE_MONITOR)
118                         ret = lbs_set_monitor_mode(priv, 0);
119                 if (!ret)
120                         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_BSS_TYPE, 2);
121                 break;
122         default:
123                 ret = -ENOTSUPP;
124         }
125         return ret;
126 }
127
128 int lbs_start_iface(struct lbs_private *priv)
129 {
130         struct cmd_ds_802_11_mac_address cmd;
131         int ret;
132
133         if (priv->power_restore) {
134                 ret = priv->power_restore(priv);
135                 if (ret)
136                         return ret;
137         }
138
139         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
140         cmd.action = cpu_to_le16(CMD_ACT_SET);
141         memcpy(cmd.macadd, priv->current_addr, ETH_ALEN);
142
143         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
144         if (ret) {
145                 lbs_deb_net("set MAC address failed\n");
146                 goto err;
147         }
148
149         ret = lbs_set_iface_type(priv, priv->wdev->iftype);
150         if (ret) {
151                 lbs_deb_net("set iface type failed\n");
152                 goto err;
153         }
154
155         lbs_update_channel(priv);
156
157         priv->iface_running = true;
158         return 0;
159
160 err:
161         if (priv->power_save)
162                 priv->power_save(priv);
163         return ret;
164 }
165
166 /**
167  *  lbs_dev_open - open the ethX interface
168  *
169  *  @dev:       A pointer to &net_device structure
170  *  returns:    0 or -EBUSY if monitor mode active
171  */
172 static int lbs_dev_open(struct net_device *dev)
173 {
174         struct lbs_private *priv = dev->ml_priv;
175         int ret = 0;
176
177         lbs_deb_enter(LBS_DEB_NET);
178         if (!priv->iface_running) {
179                 ret = lbs_start_iface(priv);
180                 if (ret)
181                         goto out;
182         }
183
184         spin_lock_irq(&priv->driver_lock);
185
186         netif_carrier_off(dev);
187
188         if (!priv->tx_pending_len)
189                 netif_wake_queue(dev);
190
191         spin_unlock_irq(&priv->driver_lock);
192
193 out:
194         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
195         return ret;
196 }
197
198 static bool lbs_command_queue_empty(struct lbs_private *priv)
199 {
200         unsigned long flags;
201         bool ret;
202         spin_lock_irqsave(&priv->driver_lock, flags);
203         ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
204         spin_unlock_irqrestore(&priv->driver_lock, flags);
205         return ret;
206 }
207
208 int lbs_stop_iface(struct lbs_private *priv)
209 {
210         unsigned long flags;
211         int ret = 0;
212
213         lbs_deb_enter(LBS_DEB_MAIN);
214
215         spin_lock_irqsave(&priv->driver_lock, flags);
216         priv->iface_running = false;
217         kfree_skb(priv->currenttxskb);
218         priv->currenttxskb = NULL;
219         priv->tx_pending_len = 0;
220         spin_unlock_irqrestore(&priv->driver_lock, flags);
221
222         cancel_work_sync(&priv->mcast_work);
223         del_timer_sync(&priv->tx_lockup_timer);
224
225         /* Disable command processing, and wait for all commands to complete */
226         lbs_deb_main("waiting for commands to complete\n");
227         wait_event(priv->waitq, lbs_command_queue_empty(priv));
228         lbs_deb_main("all commands completed\n");
229
230         if (priv->power_save)
231                 ret = priv->power_save(priv);
232
233         lbs_deb_leave(LBS_DEB_MAIN);
234         return ret;
235 }
236
237 /**
238  *  lbs_eth_stop - close the ethX interface
239  *
240  *  @dev:       A pointer to &net_device structure
241  *  returns:    0
242  */
243 static int lbs_eth_stop(struct net_device *dev)
244 {
245         struct lbs_private *priv = dev->ml_priv;
246
247         lbs_deb_enter(LBS_DEB_NET);
248
249         if (priv->connect_status == LBS_CONNECTED)
250                 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
251
252         spin_lock_irq(&priv->driver_lock);
253         netif_stop_queue(dev);
254         spin_unlock_irq(&priv->driver_lock);
255
256         lbs_update_mcast(priv);
257         cancel_delayed_work_sync(&priv->scan_work);
258         if (priv->scan_req)
259                 lbs_scan_done(priv);
260
261         netif_carrier_off(priv->dev);
262
263         if (!lbs_iface_active(priv))
264                 lbs_stop_iface(priv);
265
266         lbs_deb_leave(LBS_DEB_NET);
267         return 0;
268 }
269
270 void lbs_host_to_card_done(struct lbs_private *priv)
271 {
272         unsigned long flags;
273
274         lbs_deb_enter(LBS_DEB_THREAD);
275
276         spin_lock_irqsave(&priv->driver_lock, flags);
277         del_timer(&priv->tx_lockup_timer);
278
279         priv->dnld_sent = DNLD_RES_RECEIVED;
280
281         /* Wake main thread if commands are pending */
282         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
283                 if (!priv->wakeup_dev_required)
284                         wake_up(&priv->waitq);
285         }
286
287         spin_unlock_irqrestore(&priv->driver_lock, flags);
288         lbs_deb_leave(LBS_DEB_THREAD);
289 }
290 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
291
292 int lbs_set_mac_address(struct net_device *dev, void *addr)
293 {
294         int ret = 0;
295         struct lbs_private *priv = dev->ml_priv;
296         struct sockaddr *phwaddr = addr;
297
298         lbs_deb_enter(LBS_DEB_NET);
299
300         /*
301          * Can only set MAC address when all interfaces are down, to be written
302          * to the hardware when one of them is brought up.
303          */
304         if (lbs_iface_active(priv))
305                 return -EBUSY;
306
307         /* In case it was called from the mesh device */
308         dev = priv->dev;
309
310         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
311         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
312         if (priv->mesh_dev)
313                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
314
315         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
316         return ret;
317 }
318
319
320 static inline int mac_in_list(unsigned char *list, int list_len,
321                               unsigned char *mac)
322 {
323         while (list_len) {
324                 if (!memcmp(list, mac, ETH_ALEN))
325                         return 1;
326                 list += ETH_ALEN;
327                 list_len--;
328         }
329         return 0;
330 }
331
332
333 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
334                                struct net_device *dev, int nr_addrs)
335 {
336         int i = nr_addrs;
337         struct netdev_hw_addr *ha;
338         int cnt;
339
340         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
341                 return nr_addrs;
342
343         netif_addr_lock_bh(dev);
344         cnt = netdev_mc_count(dev);
345         netdev_for_each_mc_addr(ha, dev) {
346                 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
347                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
348                                     ha->addr);
349                         cnt--;
350                         continue;
351                 }
352
353                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
354                         break;
355                 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
356                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
357                             ha->addr);
358                 i++;
359                 cnt--;
360         }
361         netif_addr_unlock_bh(dev);
362         if (cnt)
363                 return -EOVERFLOW;
364
365         return i;
366 }
367
368 void lbs_update_mcast(struct lbs_private *priv)
369 {
370         struct cmd_ds_mac_multicast_adr mcast_cmd;
371         int dev_flags = 0;
372         int nr_addrs;
373         int old_mac_control = priv->mac_control;
374
375         lbs_deb_enter(LBS_DEB_NET);
376
377         if (netif_running(priv->dev))
378                 dev_flags |= priv->dev->flags;
379         if (priv->mesh_dev && netif_running(priv->mesh_dev))
380                 dev_flags |= priv->mesh_dev->flags;
381
382         if (dev_flags & IFF_PROMISC) {
383                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
384                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
385                                        CMD_ACT_MAC_MULTICAST_ENABLE);
386                 goto out_set_mac_control;
387         } else if (dev_flags & IFF_ALLMULTI) {
388         do_allmulti:
389                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
390                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
391                                        CMD_ACT_MAC_MULTICAST_ENABLE);
392                 goto out_set_mac_control;
393         }
394
395         /* Once for priv->dev, again for priv->mesh_dev if it exists */
396         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
397         if (nr_addrs >= 0 && priv->mesh_dev)
398                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
399         if (nr_addrs < 0)
400                 goto do_allmulti;
401
402         if (nr_addrs) {
403                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
404                                     maclist[6*nr_addrs]);
405
406                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
407                 mcast_cmd.hdr.size = cpu_to_le16(size);
408                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
409
410                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
411
412                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
413         } else
414                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
415
416         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
417                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
418  out_set_mac_control:
419         if (priv->mac_control != old_mac_control)
420                 lbs_set_mac_control(priv);
421
422         lbs_deb_leave(LBS_DEB_NET);
423 }
424
425 static void lbs_set_mcast_worker(struct work_struct *work)
426 {
427         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
428         lbs_update_mcast(priv);
429 }
430
431 void lbs_set_multicast_list(struct net_device *dev)
432 {
433         struct lbs_private *priv = dev->ml_priv;
434
435         schedule_work(&priv->mcast_work);
436 }
437
438 /**
439  *  lbs_thread - handles the major jobs in the LBS driver.
440  *  It handles all events generated by firmware, RX data received
441  *  from firmware and TX data sent from kernel.
442  *
443  *  @data:      A pointer to &lbs_thread structure
444  *  returns:    0
445  */
446 static int lbs_thread(void *data)
447 {
448         struct net_device *dev = data;
449         struct lbs_private *priv = dev->ml_priv;
450         wait_queue_t wait;
451
452         lbs_deb_enter(LBS_DEB_THREAD);
453
454         init_waitqueue_entry(&wait, current);
455
456         for (;;) {
457                 int shouldsleep;
458                 u8 resp_idx;
459
460                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
461                                 priv->currenttxskb, priv->dnld_sent);
462
463                 add_wait_queue(&priv->waitq, &wait);
464                 set_current_state(TASK_INTERRUPTIBLE);
465                 spin_lock_irq(&priv->driver_lock);
466
467                 if (kthread_should_stop())
468                         shouldsleep = 0;        /* Bye */
469                 else if (priv->surpriseremoved)
470                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
471                 else if (priv->psstate == PS_STATE_SLEEP)
472                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
473                 else if (priv->cmd_timed_out)
474                         shouldsleep = 0;        /* Command timed out. Recover */
475                 else if (!priv->fw_ready)
476                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
477                 else if (priv->dnld_sent)
478                         shouldsleep = 1;        /* Something is en route to the device already */
479                 else if (priv->tx_pending_len > 0)
480                         shouldsleep = 0;        /* We've a packet to send */
481                 else if (priv->resp_len[priv->resp_idx])
482                         shouldsleep = 0;        /* We have a command response */
483                 else if (priv->cur_cmd)
484                         shouldsleep = 1;        /* Can't send a command; one already running */
485                 else if (!list_empty(&priv->cmdpendingq) &&
486                                         !(priv->wakeup_dev_required))
487                         shouldsleep = 0;        /* We have a command to send */
488                 else if (kfifo_len(&priv->event_fifo))
489                         shouldsleep = 0;        /* We have an event to process */
490                 else
491                         shouldsleep = 1;        /* No command */
492
493                 if (shouldsleep) {
494                         lbs_deb_thread("sleeping, connect_status %d, "
495                                 "psmode %d, psstate %d\n",
496                                 priv->connect_status,
497                                 priv->psmode, priv->psstate);
498                         spin_unlock_irq(&priv->driver_lock);
499                         schedule();
500                 } else
501                         spin_unlock_irq(&priv->driver_lock);
502
503                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
504                                priv->currenttxskb, priv->dnld_sent);
505
506                 set_current_state(TASK_RUNNING);
507                 remove_wait_queue(&priv->waitq, &wait);
508
509                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
510                                priv->currenttxskb, priv->dnld_sent);
511
512                 if (kthread_should_stop()) {
513                         lbs_deb_thread("break from main thread\n");
514                         break;
515                 }
516
517                 if (priv->surpriseremoved) {
518                         lbs_deb_thread("adapter removed; waiting to die...\n");
519                         continue;
520                 }
521
522                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
523                        priv->currenttxskb, priv->dnld_sent);
524
525                 /* Process any pending command response */
526                 spin_lock_irq(&priv->driver_lock);
527                 resp_idx = priv->resp_idx;
528                 if (priv->resp_len[resp_idx]) {
529                         spin_unlock_irq(&priv->driver_lock);
530                         lbs_process_command_response(priv,
531                                 priv->resp_buf[resp_idx],
532                                 priv->resp_len[resp_idx]);
533                         spin_lock_irq(&priv->driver_lock);
534                         priv->resp_len[resp_idx] = 0;
535                 }
536                 spin_unlock_irq(&priv->driver_lock);
537
538                 /* Process hardware events, e.g. card removed, link lost */
539                 spin_lock_irq(&priv->driver_lock);
540                 while (kfifo_len(&priv->event_fifo)) {
541                         u32 event;
542
543                         if (kfifo_out(&priv->event_fifo,
544                                 (unsigned char *) &event, sizeof(event)) !=
545                                 sizeof(event))
546                                         break;
547                         spin_unlock_irq(&priv->driver_lock);
548                         lbs_process_event(priv, event);
549                         spin_lock_irq(&priv->driver_lock);
550                 }
551                 spin_unlock_irq(&priv->driver_lock);
552
553                 if (priv->wakeup_dev_required) {
554                         lbs_deb_thread("Waking up device...\n");
555                         /* Wake up device */
556                         if (priv->exit_deep_sleep(priv))
557                                 lbs_deb_thread("Wakeup device failed\n");
558                         continue;
559                 }
560
561                 /* command timeout stuff */
562                 if (priv->cmd_timed_out && priv->cur_cmd) {
563                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
564
565                         netdev_info(dev, "Timeout submitting command 0x%04x\n",
566                                     le16_to_cpu(cmdnode->cmdbuf->command));
567                         lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
568                         if (priv->reset_card)
569                                 priv->reset_card(priv);
570                 }
571                 priv->cmd_timed_out = 0;
572
573                 if (!priv->fw_ready)
574                         continue;
575
576                 /* Check if we need to confirm Sleep Request received previously */
577                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
578                     !priv->dnld_sent && !priv->cur_cmd) {
579                         if (priv->connect_status == LBS_CONNECTED) {
580                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
581                                         "dnld_sent %d, cur_cmd %p\n",
582                                         priv->currenttxskb, priv->dnld_sent,
583                                         priv->cur_cmd);
584
585                                 lbs_ps_confirm_sleep(priv);
586                         } else {
587                                 /* workaround for firmware sending
588                                  * deauth/linkloss event immediately
589                                  * after sleep request; remove this
590                                  * after firmware fixes it
591                                  */
592                                 priv->psstate = PS_STATE_AWAKE;
593                                 netdev_alert(dev,
594                                              "ignore PS_SleepConfirm in non-connected state\n");
595                         }
596                 }
597
598                 /* The PS state is changed during processing of Sleep Request
599                  * event above
600                  */
601                 if ((priv->psstate == PS_STATE_SLEEP) ||
602                     (priv->psstate == PS_STATE_PRE_SLEEP))
603                         continue;
604
605                 if (priv->is_deep_sleep)
606                         continue;
607
608                 /* Execute the next command */
609                 if (!priv->dnld_sent && !priv->cur_cmd)
610                         lbs_execute_next_command(priv);
611
612                 spin_lock_irq(&priv->driver_lock);
613                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
614                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
615                                                         priv->tx_pending_buf,
616                                                         priv->tx_pending_len);
617                         if (ret) {
618                                 lbs_deb_tx("host_to_card failed %d\n", ret);
619                                 priv->dnld_sent = DNLD_RES_RECEIVED;
620                         } else {
621                                 mod_timer(&priv->tx_lockup_timer,
622                                           jiffies + (HZ * 5));
623                         }
624                         priv->tx_pending_len = 0;
625                         if (!priv->currenttxskb) {
626                                 /* We can wake the queues immediately if we aren't
627                                    waiting for TX feedback */
628                                 if (priv->connect_status == LBS_CONNECTED)
629                                         netif_wake_queue(priv->dev);
630                                 if (priv->mesh_dev &&
631                                     netif_running(priv->mesh_dev))
632                                         netif_wake_queue(priv->mesh_dev);
633                         }
634                 }
635                 spin_unlock_irq(&priv->driver_lock);
636         }
637
638         del_timer(&priv->command_timer);
639         del_timer(&priv->tx_lockup_timer);
640         del_timer(&priv->auto_deepsleep_timer);
641
642         lbs_deb_leave(LBS_DEB_THREAD);
643         return 0;
644 }
645
646 /**
647  * lbs_setup_firmware - gets the HW spec from the firmware and sets
648  *        some basic parameters
649  *
650  *  @priv:      A pointer to &struct lbs_private structure
651  *  returns:    0 or -1
652  */
653 static int lbs_setup_firmware(struct lbs_private *priv)
654 {
655         int ret = -1;
656         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
657
658         lbs_deb_enter(LBS_DEB_FW);
659
660         /* Read MAC address from firmware */
661         memset(priv->current_addr, 0xff, ETH_ALEN);
662         ret = lbs_update_hw_spec(priv);
663         if (ret)
664                 goto done;
665
666         /* Read power levels if available */
667         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
668         if (ret == 0) {
669                 priv->txpower_cur = curlevel;
670                 priv->txpower_min = minlevel;
671                 priv->txpower_max = maxlevel;
672         }
673
674         /* Send cmd to FW to enable 11D function */
675         ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
676
677         lbs_set_mac_control(priv);
678 done:
679         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
680         return ret;
681 }
682
683 int lbs_suspend(struct lbs_private *priv)
684 {
685         int ret;
686
687         lbs_deb_enter(LBS_DEB_FW);
688
689         if (priv->is_deep_sleep) {
690                 ret = lbs_set_deep_sleep(priv, 0);
691                 if (ret) {
692                         netdev_err(priv->dev,
693                                    "deep sleep cancellation failed: %d\n", ret);
694                         return ret;
695                 }
696                 priv->deep_sleep_required = 1;
697         }
698
699         ret = lbs_set_host_sleep(priv, 1);
700
701         netif_device_detach(priv->dev);
702         if (priv->mesh_dev)
703                 netif_device_detach(priv->mesh_dev);
704
705         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
706         return ret;
707 }
708 EXPORT_SYMBOL_GPL(lbs_suspend);
709
710 int lbs_resume(struct lbs_private *priv)
711 {
712         int ret;
713
714         lbs_deb_enter(LBS_DEB_FW);
715
716         ret = lbs_set_host_sleep(priv, 0);
717
718         netif_device_attach(priv->dev);
719         if (priv->mesh_dev)
720                 netif_device_attach(priv->mesh_dev);
721
722         if (priv->deep_sleep_required) {
723                 priv->deep_sleep_required = 0;
724                 ret = lbs_set_deep_sleep(priv, 1);
725                 if (ret)
726                         netdev_err(priv->dev,
727                                    "deep sleep activation failed: %d\n", ret);
728         }
729
730         if (priv->setup_fw_on_resume)
731                 ret = lbs_setup_firmware(priv);
732
733         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
734         return ret;
735 }
736 EXPORT_SYMBOL_GPL(lbs_resume);
737
738 /**
739  * lbs_cmd_timeout_handler - handles the timeout of command sending.
740  * It will re-send the same command again.
741  *
742  * @data: &struct lbs_private pointer
743  */
744 static void lbs_cmd_timeout_handler(unsigned long data)
745 {
746         struct lbs_private *priv = (struct lbs_private *)data;
747         unsigned long flags;
748
749         lbs_deb_enter(LBS_DEB_CMD);
750         spin_lock_irqsave(&priv->driver_lock, flags);
751
752         if (!priv->cur_cmd)
753                 goto out;
754
755         netdev_info(priv->dev, "command 0x%04x timed out\n",
756                     le16_to_cpu(priv->cur_cmd->cmdbuf->command));
757
758         priv->cmd_timed_out = 1;
759
760         /*
761          * If the device didn't even acknowledge the command, reset the state
762          * so that we don't block all future commands due to this one timeout.
763          */
764         if (priv->dnld_sent == DNLD_CMD_SENT)
765                 priv->dnld_sent = DNLD_RES_RECEIVED;
766
767         wake_up(&priv->waitq);
768 out:
769         spin_unlock_irqrestore(&priv->driver_lock, flags);
770         lbs_deb_leave(LBS_DEB_CMD);
771 }
772
773 /**
774  * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
775  * to the hardware. This is known to frequently happen with SD8686 when
776  * waking up after a Wake-on-WLAN-triggered resume.
777  *
778  * @data: &struct lbs_private pointer
779  */
780 static void lbs_tx_lockup_handler(unsigned long data)
781 {
782         struct lbs_private *priv = (struct lbs_private *)data;
783         unsigned long flags;
784
785         lbs_deb_enter(LBS_DEB_TX);
786         spin_lock_irqsave(&priv->driver_lock, flags);
787
788         netdev_info(priv->dev, "TX lockup detected\n");
789         if (priv->reset_card)
790                 priv->reset_card(priv);
791
792         priv->dnld_sent = DNLD_RES_RECEIVED;
793         wake_up_interruptible(&priv->waitq);
794
795         spin_unlock_irqrestore(&priv->driver_lock, flags);
796         lbs_deb_leave(LBS_DEB_TX);
797 }
798
799 /**
800  * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
801  * timer expires and no activity (command, event, data etc.) is detected.
802  * @data:       &struct lbs_private pointer
803  * returns:     N/A
804  */
805 static void auto_deepsleep_timer_fn(unsigned long data)
806 {
807         struct lbs_private *priv = (struct lbs_private *)data;
808
809         lbs_deb_enter(LBS_DEB_CMD);
810
811         if (priv->is_activity_detected) {
812                 priv->is_activity_detected = 0;
813         } else {
814                 if (priv->is_auto_deep_sleep_enabled &&
815                     (!priv->wakeup_dev_required) &&
816                     (priv->connect_status != LBS_CONNECTED)) {
817                         struct cmd_header cmd;
818
819                         lbs_deb_main("Entering auto deep sleep mode...\n");
820                         memset(&cmd, 0, sizeof(cmd));
821                         cmd.size = cpu_to_le16(sizeof(cmd));
822                         lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
823                                         sizeof(cmd));
824                 }
825         }
826         mod_timer(&priv->auto_deepsleep_timer , jiffies +
827                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
828         lbs_deb_leave(LBS_DEB_CMD);
829 }
830
831 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
832 {
833         lbs_deb_enter(LBS_DEB_SDIO);
834
835         priv->is_auto_deep_sleep_enabled = 1;
836         if (priv->is_deep_sleep)
837                 priv->wakeup_dev_required = 1;
838         mod_timer(&priv->auto_deepsleep_timer ,
839                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
840
841         lbs_deb_leave(LBS_DEB_SDIO);
842         return 0;
843 }
844
845 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
846 {
847         lbs_deb_enter(LBS_DEB_SDIO);
848
849         priv->is_auto_deep_sleep_enabled = 0;
850         priv->auto_deep_sleep_timeout = 0;
851         del_timer(&priv->auto_deepsleep_timer);
852
853         lbs_deb_leave(LBS_DEB_SDIO);
854         return 0;
855 }
856
857 static int lbs_init_adapter(struct lbs_private *priv)
858 {
859         int ret;
860
861         lbs_deb_enter(LBS_DEB_MAIN);
862
863         memset(priv->current_addr, 0xff, ETH_ALEN);
864
865         priv->connect_status = LBS_DISCONNECTED;
866         priv->channel = DEFAULT_AD_HOC_CHANNEL;
867         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
868         priv->radio_on = 1;
869         priv->psmode = LBS802_11POWERMODECAM;
870         priv->psstate = PS_STATE_FULL_POWER;
871         priv->is_deep_sleep = 0;
872         priv->is_auto_deep_sleep_enabled = 0;
873         priv->deep_sleep_required = 0;
874         priv->wakeup_dev_required = 0;
875         init_waitqueue_head(&priv->ds_awake_q);
876         init_waitqueue_head(&priv->scan_q);
877         priv->authtype_auto = 1;
878         priv->is_host_sleep_configured = 0;
879         priv->is_host_sleep_activated = 0;
880         init_waitqueue_head(&priv->host_sleep_q);
881         mutex_init(&priv->lock);
882
883         setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
884                 (unsigned long)priv);
885         setup_timer(&priv->tx_lockup_timer, lbs_tx_lockup_handler,
886                 (unsigned long)priv);
887         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
888                         (unsigned long)priv);
889
890         INIT_LIST_HEAD(&priv->cmdfreeq);
891         INIT_LIST_HEAD(&priv->cmdpendingq);
892
893         spin_lock_init(&priv->driver_lock);
894
895         /* Allocate the command buffers */
896         if (lbs_allocate_cmd_buffer(priv)) {
897                 pr_err("Out of memory allocating command buffers\n");
898                 ret = -ENOMEM;
899                 goto out;
900         }
901         priv->resp_idx = 0;
902         priv->resp_len[0] = priv->resp_len[1] = 0;
903
904         /* Create the event FIFO */
905         ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
906         if (ret) {
907                 pr_err("Out of memory allocating event FIFO buffer\n");
908                 goto out;
909         }
910
911 out:
912         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
913
914         return ret;
915 }
916
917 static void lbs_free_adapter(struct lbs_private *priv)
918 {
919         lbs_deb_enter(LBS_DEB_MAIN);
920
921         lbs_free_cmd_buffer(priv);
922         kfifo_free(&priv->event_fifo);
923         del_timer(&priv->command_timer);
924         del_timer(&priv->tx_lockup_timer);
925         del_timer(&priv->auto_deepsleep_timer);
926
927         lbs_deb_leave(LBS_DEB_MAIN);
928 }
929
930 static const struct net_device_ops lbs_netdev_ops = {
931         .ndo_open               = lbs_dev_open,
932         .ndo_stop               = lbs_eth_stop,
933         .ndo_start_xmit         = lbs_hard_start_xmit,
934         .ndo_set_mac_address    = lbs_set_mac_address,
935         .ndo_set_rx_mode        = lbs_set_multicast_list,
936         .ndo_change_mtu         = eth_change_mtu,
937         .ndo_validate_addr      = eth_validate_addr,
938 };
939
940 /**
941  * lbs_add_card - adds the card. It will probe the
942  * card, allocate the lbs_priv and initialize the device.
943  *
944  * @card:       A pointer to card
945  * @dmdev:      A pointer to &struct device
946  * returns:     A pointer to &struct lbs_private structure
947  */
948 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
949 {
950         struct net_device *dev;
951         struct wireless_dev *wdev;
952         struct lbs_private *priv = NULL;
953
954         lbs_deb_enter(LBS_DEB_MAIN);
955
956         /* Allocate an Ethernet device and register it */
957         wdev = lbs_cfg_alloc(dmdev);
958         if (IS_ERR(wdev)) {
959                 pr_err("cfg80211 init failed\n");
960                 goto done;
961         }
962
963         wdev->iftype = NL80211_IFTYPE_STATION;
964         priv = wdev_priv(wdev);
965         priv->wdev = wdev;
966
967         if (lbs_init_adapter(priv)) {
968                 pr_err("failed to initialize adapter structure\n");
969                 goto err_wdev;
970         }
971
972         dev = alloc_netdev(0, "wlan%d", ether_setup);
973         if (!dev) {
974                 dev_err(dmdev, "no memory for network device instance\n");
975                 goto err_adapter;
976         }
977
978         dev->ieee80211_ptr = wdev;
979         dev->ml_priv = priv;
980         SET_NETDEV_DEV(dev, dmdev);
981         wdev->netdev = dev;
982         priv->dev = dev;
983
984         dev->netdev_ops = &lbs_netdev_ops;
985         dev->watchdog_timeo = 5 * HZ;
986         dev->ethtool_ops = &lbs_ethtool_ops;
987         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
988
989         priv->card = card;
990
991         strcpy(dev->name, "wlan%d");
992
993         lbs_deb_thread("Starting main thread...\n");
994         init_waitqueue_head(&priv->waitq);
995         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
996         if (IS_ERR(priv->main_thread)) {
997                 lbs_deb_thread("Error creating main thread.\n");
998                 goto err_ndev;
999         }
1000
1001         priv->work_thread = create_singlethread_workqueue("lbs_worker");
1002         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
1003
1004         priv->wol_criteria = EHS_REMOVE_WAKEUP;
1005         priv->wol_gpio = 0xff;
1006         priv->wol_gap = 20;
1007         priv->ehs_remove_supported = true;
1008
1009         goto done;
1010
1011  err_ndev:
1012         free_netdev(dev);
1013
1014  err_adapter:
1015         lbs_free_adapter(priv);
1016
1017  err_wdev:
1018         lbs_cfg_free(priv);
1019
1020         priv = NULL;
1021
1022 done:
1023         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1024         return priv;
1025 }
1026 EXPORT_SYMBOL_GPL(lbs_add_card);
1027
1028
1029 void lbs_remove_card(struct lbs_private *priv)
1030 {
1031         struct net_device *dev = priv->dev;
1032
1033         lbs_deb_enter(LBS_DEB_MAIN);
1034
1035         lbs_remove_mesh(priv);
1036         lbs_scan_deinit(priv);
1037
1038         /* worker thread destruction blocks on the in-flight command which
1039          * should have been cleared already in lbs_stop_card().
1040          */
1041         lbs_deb_main("destroying worker thread\n");
1042         destroy_workqueue(priv->work_thread);
1043         lbs_deb_main("done destroying worker thread\n");
1044
1045         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1046                 priv->psmode = LBS802_11POWERMODECAM;
1047                 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
1048         }
1049
1050         if (priv->is_deep_sleep) {
1051                 priv->is_deep_sleep = 0;
1052                 wake_up_interruptible(&priv->ds_awake_q);
1053         }
1054
1055         priv->is_host_sleep_configured = 0;
1056         priv->is_host_sleep_activated = 0;
1057         wake_up_interruptible(&priv->host_sleep_q);
1058
1059         /* Stop the thread servicing the interrupts */
1060         priv->surpriseremoved = 1;
1061         kthread_stop(priv->main_thread);
1062
1063         lbs_free_adapter(priv);
1064         lbs_cfg_free(priv);
1065         free_netdev(dev);
1066
1067         lbs_deb_leave(LBS_DEB_MAIN);
1068 }
1069 EXPORT_SYMBOL_GPL(lbs_remove_card);
1070
1071
1072 int lbs_rtap_supported(struct lbs_private *priv)
1073 {
1074         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1075                 return 1;
1076
1077         /* newer firmware use a capability mask */
1078         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1079                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1080 }
1081
1082
1083 int lbs_start_card(struct lbs_private *priv)
1084 {
1085         struct net_device *dev = priv->dev;
1086         int ret = -1;
1087
1088         lbs_deb_enter(LBS_DEB_MAIN);
1089
1090         /* poke the firmware */
1091         ret = lbs_setup_firmware(priv);
1092         if (ret)
1093                 goto done;
1094
1095         if (!lbs_disablemesh)
1096                 lbs_init_mesh(priv);
1097         else
1098                 pr_info("%s: mesh disabled\n", dev->name);
1099
1100         if (lbs_cfg_register(priv)) {
1101                 pr_err("cannot register device\n");
1102                 goto done;
1103         }
1104
1105         if (lbs_mesh_activated(priv))
1106                 lbs_start_mesh(priv);
1107
1108         lbs_debugfs_init_one(priv, dev);
1109
1110         netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1111
1112         ret = 0;
1113
1114 done:
1115         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1116         return ret;
1117 }
1118 EXPORT_SYMBOL_GPL(lbs_start_card);
1119
1120
1121 void lbs_stop_card(struct lbs_private *priv)
1122 {
1123         struct net_device *dev;
1124
1125         lbs_deb_enter(LBS_DEB_MAIN);
1126
1127         if (!priv)
1128                 goto out;
1129         dev = priv->dev;
1130
1131         netif_stop_queue(dev);
1132         netif_carrier_off(dev);
1133
1134         lbs_debugfs_remove_one(priv);
1135         lbs_deinit_mesh(priv);
1136         unregister_netdev(dev);
1137
1138 out:
1139         lbs_deb_leave(LBS_DEB_MAIN);
1140 }
1141 EXPORT_SYMBOL_GPL(lbs_stop_card);
1142
1143
1144 void lbs_queue_event(struct lbs_private *priv, u32 event)
1145 {
1146         unsigned long flags;
1147
1148         lbs_deb_enter(LBS_DEB_THREAD);
1149         spin_lock_irqsave(&priv->driver_lock, flags);
1150
1151         if (priv->psstate == PS_STATE_SLEEP)
1152                 priv->psstate = PS_STATE_AWAKE;
1153
1154         kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1155
1156         wake_up(&priv->waitq);
1157
1158         spin_unlock_irqrestore(&priv->driver_lock, flags);
1159         lbs_deb_leave(LBS_DEB_THREAD);
1160 }
1161 EXPORT_SYMBOL_GPL(lbs_queue_event);
1162
1163 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1164 {
1165         lbs_deb_enter(LBS_DEB_THREAD);
1166
1167         if (priv->psstate == PS_STATE_SLEEP)
1168                 priv->psstate = PS_STATE_AWAKE;
1169
1170         /* Swap buffers by flipping the response index */
1171         BUG_ON(resp_idx > 1);
1172         priv->resp_idx = resp_idx;
1173
1174         wake_up(&priv->waitq);
1175
1176         lbs_deb_leave(LBS_DEB_THREAD);
1177 }
1178 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1179
1180 /**
1181  *  lbs_get_firmware - Retrieves two-stage firmware
1182  *
1183  *  @dev:       A pointer to &device structure
1184  *  @user_helper: User-defined helper firmware file
1185  *  @user_mainfw: User-defined main firmware file
1186  *  @card_model: Bus-specific card model ID used to filter firmware table
1187  *              elements
1188  *  @fw_table:  Table of firmware file names and device model numbers
1189  *              terminated by an entry with a NULL helper name
1190  *  @helper:    On success, the helper firmware; caller must free
1191  *  @mainfw:    On success, the main firmware; caller must free
1192  *
1193  *  returns:            0 on success, non-zero on failure
1194  */
1195 int lbs_get_firmware(struct device *dev, const char *user_helper,
1196                         const char *user_mainfw, u32 card_model,
1197                         const struct lbs_fw_table *fw_table,
1198                         const struct firmware **helper,
1199                         const struct firmware **mainfw)
1200 {
1201         const struct lbs_fw_table *iter;
1202         int ret;
1203
1204         BUG_ON(helper == NULL);
1205         BUG_ON(mainfw == NULL);
1206
1207         /* Try user-specified firmware first */
1208         if (user_helper) {
1209                 ret = request_firmware(helper, user_helper, dev);
1210                 if (ret) {
1211                         dev_err(dev, "couldn't find helper firmware %s\n",
1212                                 user_helper);
1213                         goto fail;
1214                 }
1215         }
1216         if (user_mainfw) {
1217                 ret = request_firmware(mainfw, user_mainfw, dev);
1218                 if (ret) {
1219                         dev_err(dev, "couldn't find main firmware %s\n",
1220                                 user_mainfw);
1221                         goto fail;
1222                 }
1223         }
1224
1225         if (*helper && *mainfw)
1226                 return 0;
1227
1228         /* Otherwise search for firmware to use.  If neither the helper or
1229          * the main firmware were specified by the user, then we need to
1230          * make sure that found helper & main are from the same entry in
1231          * fw_table.
1232          */
1233         iter = fw_table;
1234         while (iter && iter->helper) {
1235                 if (iter->model != card_model)
1236                         goto next;
1237
1238                 if (*helper == NULL) {
1239                         ret = request_firmware(helper, iter->helper, dev);
1240                         if (ret)
1241                                 goto next;
1242
1243                         /* If the device has one-stage firmware (ie cf8305) and
1244                          * we've got it then we don't need to bother with the
1245                          * main firmware.
1246                          */
1247                         if (iter->fwname == NULL)
1248                                 return 0;
1249                 }
1250
1251                 if (*mainfw == NULL) {
1252                         ret = request_firmware(mainfw, iter->fwname, dev);
1253                         if (ret && !user_helper) {
1254                                 /* Clear the helper if it wasn't user-specified
1255                                  * and the main firmware load failed, to ensure
1256                                  * we don't have mismatched firmware pairs.
1257                                  */
1258                                 release_firmware(*helper);
1259                                 *helper = NULL;
1260                         }
1261                 }
1262
1263                 if (*helper && *mainfw)
1264                         return 0;
1265
1266   next:
1267                 iter++;
1268         }
1269
1270   fail:
1271         /* Failed */
1272         if (*helper) {
1273                 release_firmware(*helper);
1274                 *helper = NULL;
1275         }
1276         if (*mainfw) {
1277                 release_firmware(*mainfw);
1278                 *mainfw = NULL;
1279         }
1280
1281         return -ENOENT;
1282 }
1283 EXPORT_SYMBOL_GPL(lbs_get_firmware);
1284
1285 static int __init lbs_init_module(void)
1286 {
1287         lbs_deb_enter(LBS_DEB_MAIN);
1288         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1289         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1290         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1291         confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1292         lbs_debugfs_init();
1293         lbs_deb_leave(LBS_DEB_MAIN);
1294         return 0;
1295 }
1296
1297 static void __exit lbs_exit_module(void)
1298 {
1299         lbs_deb_enter(LBS_DEB_MAIN);
1300         lbs_debugfs_remove();
1301         lbs_deb_leave(LBS_DEB_MAIN);
1302 }
1303
1304 module_init(lbs_init_module);
1305 module_exit(lbs_exit_module);
1306
1307 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1308 MODULE_AUTHOR("Marvell International Ltd.");
1309 MODULE_LICENSE("GPL");