127b7f60c320bbad99fd875dec6f569dde098e57
[linux-2.6.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 #include <linux/moduleparam.h>
8 #include <linux/delay.h>
9 #include <linux/etherdevice.h>
10 #include <linux/netdevice.h>
11 #include <linux/if_arp.h>
12 #include <linux/kthread.h>
13 #include <linux/kfifo.h>
14 #include <linux/stddef.h>
15 #include <linux/ieee80211.h>
16 #include <net/iw_handler.h>
17 #include <net/cfg80211.h>
18
19 #include "host.h"
20 #include "decl.h"
21 #include "dev.h"
22 #include "wext.h"
23 #include "cfg.h"
24 #include "debugfs.h"
25 #include "scan.h"
26 #include "assoc.h"
27 #include "cmd.h"
28
29 #define DRIVER_RELEASE_VERSION "323.p0"
30 const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
31 #ifdef  DEBUG
32     "-dbg"
33 #endif
34     "";
35
36
37 /* Module parameters */
38 unsigned int lbs_debug;
39 EXPORT_SYMBOL_GPL(lbs_debug);
40 module_param_named(libertas_debug, lbs_debug, int, 0644);
41
42
43 /* This global structure is used to send the confirm_sleep command as
44  * fast as possible down to the firmware. */
45 struct cmd_confirm_sleep confirm_sleep;
46
47
48 /**
49  * the table to keep region code
50  */
51 u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
52     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
53
54 /**
55  * FW rate table.  FW refers to rates by their index in this table, not by the
56  * rate value itself.  Values of 0x00 are
57  * reserved positions.
58  */
59 static u8 fw_data_rates[MAX_RATES] =
60     { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
61       0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
62 };
63
64 /**
65  *  @brief use index to get the data rate
66  *
67  *  @param idx                The index of data rate
68  *  @return                     data rate or 0
69  */
70 u32 lbs_fw_index_to_data_rate(u8 idx)
71 {
72         if (idx >= sizeof(fw_data_rates))
73                 idx = 0;
74         return fw_data_rates[idx];
75 }
76
77 /**
78  *  @brief use rate to get the index
79  *
80  *  @param rate                 data rate
81  *  @return                     index or 0
82  */
83 u8 lbs_data_rate_to_fw_index(u32 rate)
84 {
85         u8 i;
86
87         if (!rate)
88                 return 0;
89
90         for (i = 0; i < sizeof(fw_data_rates); i++) {
91                 if (rate == fw_data_rates[i])
92                         return i;
93         }
94         return 0;
95 }
96
97
98 static int lbs_add_rtap(struct lbs_private *priv);
99 static void lbs_remove_rtap(struct lbs_private *priv);
100
101
102 /**
103  * Get function for sysfs attribute rtap
104  */
105 static ssize_t lbs_rtap_get(struct device *dev,
106                 struct device_attribute *attr, char * buf)
107 {
108         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
109         return snprintf(buf, 5, "0x%X\n", priv->monitormode);
110 }
111
112 /**
113  *  Set function for sysfs attribute rtap
114  */
115 static ssize_t lbs_rtap_set(struct device *dev,
116                 struct device_attribute *attr, const char * buf, size_t count)
117 {
118         int monitor_mode;
119         struct lbs_private *priv = to_net_dev(dev)->ml_priv;
120
121         sscanf(buf, "%x", &monitor_mode);
122         if (monitor_mode) {
123                 if (priv->monitormode == monitor_mode)
124                         return strlen(buf);
125                 if (!priv->monitormode) {
126                         if (priv->infra_open || priv->mesh_open)
127                                 return -EBUSY;
128                         if (priv->mode == IW_MODE_INFRA)
129                                 lbs_cmd_80211_deauthenticate(priv,
130                                                              priv->curbssparams.bssid,
131                                                              WLAN_REASON_DEAUTH_LEAVING);
132                         else if (priv->mode == IW_MODE_ADHOC)
133                                 lbs_adhoc_stop(priv);
134                         lbs_add_rtap(priv);
135                 }
136                 priv->monitormode = monitor_mode;
137         } else {
138                 if (!priv->monitormode)
139                         return strlen(buf);
140                 priv->monitormode = 0;
141                 lbs_remove_rtap(priv);
142
143                 if (priv->currenttxskb) {
144                         dev_kfree_skb_any(priv->currenttxskb);
145                         priv->currenttxskb = NULL;
146                 }
147
148                 /* Wake queues, command thread, etc. */
149                 lbs_host_to_card_done(priv);
150         }
151
152         lbs_prepare_and_send_command(priv,
153                         CMD_802_11_MONITOR_MODE, CMD_ACT_SET,
154                         CMD_OPTION_WAITFORRSP, 0, &priv->monitormode);
155         return strlen(buf);
156 }
157
158 /**
159  * lbs_rtap attribute to be exported per ethX interface
160  * through sysfs (/sys/class/net/ethX/lbs_rtap)
161  */
162 static DEVICE_ATTR(lbs_rtap, 0644, lbs_rtap_get, lbs_rtap_set );
163
164 /**
165  *  @brief This function opens the ethX interface
166  *
167  *  @param dev     A pointer to net_device structure
168  *  @return        0 or -EBUSY if monitor mode active
169  */
170 static int lbs_dev_open(struct net_device *dev)
171 {
172         struct lbs_private *priv = dev->ml_priv;
173         int ret = 0;
174
175         lbs_deb_enter(LBS_DEB_NET);
176
177         spin_lock_irq(&priv->driver_lock);
178
179         if (priv->monitormode) {
180                 ret = -EBUSY;
181                 goto out;
182         }
183
184         priv->infra_open = 1;
185
186         if (priv->connect_status == LBS_CONNECTED)
187                 netif_carrier_on(dev);
188         else
189                 netif_carrier_off(dev);
190
191         if (!priv->tx_pending_len)
192                 netif_wake_queue(dev);
193  out:
194
195         spin_unlock_irq(&priv->driver_lock);
196         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
197         return ret;
198 }
199
200 /**
201  *  @brief This function closes the ethX interface
202  *
203  *  @param dev     A pointer to net_device structure
204  *  @return        0
205  */
206 static int lbs_eth_stop(struct net_device *dev)
207 {
208         struct lbs_private *priv = dev->ml_priv;
209
210         lbs_deb_enter(LBS_DEB_NET);
211
212         spin_lock_irq(&priv->driver_lock);
213         priv->infra_open = 0;
214         netif_stop_queue(dev);
215         spin_unlock_irq(&priv->driver_lock);
216
217         schedule_work(&priv->mcast_work);
218
219         lbs_deb_leave(LBS_DEB_NET);
220         return 0;
221 }
222
223 static void lbs_tx_timeout(struct net_device *dev)
224 {
225         struct lbs_private *priv = dev->ml_priv;
226
227         lbs_deb_enter(LBS_DEB_TX);
228
229         lbs_pr_err("tx watch dog timeout\n");
230
231         dev->trans_start = jiffies;
232
233         if (priv->currenttxskb)
234                 lbs_send_tx_feedback(priv, 0);
235
236         /* XX: Shouldn't we also call into the hw-specific driver
237            to kick it somehow? */
238         lbs_host_to_card_done(priv);
239
240         /* More often than not, this actually happens because the
241            firmware has crapped itself -- rather than just a very
242            busy medium. So send a harmless command, and if/when
243            _that_ times out, we'll kick it in the head. */
244         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
245                                      0, 0, NULL);
246
247         lbs_deb_leave(LBS_DEB_TX);
248 }
249
250 void lbs_host_to_card_done(struct lbs_private *priv)
251 {
252         unsigned long flags;
253
254         lbs_deb_enter(LBS_DEB_THREAD);
255
256         spin_lock_irqsave(&priv->driver_lock, flags);
257
258         priv->dnld_sent = DNLD_RES_RECEIVED;
259
260         /* Wake main thread if commands are pending */
261         if (!priv->cur_cmd || priv->tx_pending_len > 0) {
262                 if (!priv->wakeup_dev_required)
263                         wake_up_interruptible(&priv->waitq);
264         }
265
266         spin_unlock_irqrestore(&priv->driver_lock, flags);
267         lbs_deb_leave(LBS_DEB_THREAD);
268 }
269 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
270
271 int lbs_set_mac_address(struct net_device *dev, void *addr)
272 {
273         int ret = 0;
274         struct lbs_private *priv = dev->ml_priv;
275         struct sockaddr *phwaddr = addr;
276         struct cmd_ds_802_11_mac_address cmd;
277
278         lbs_deb_enter(LBS_DEB_NET);
279
280         /* In case it was called from the mesh device */
281         dev = priv->dev;
282
283         cmd.hdr.size = cpu_to_le16(sizeof(cmd));
284         cmd.action = cpu_to_le16(CMD_ACT_SET);
285         memcpy(cmd.macadd, phwaddr->sa_data, ETH_ALEN);
286
287         ret = lbs_cmd_with_response(priv, CMD_802_11_MAC_ADDRESS, &cmd);
288         if (ret) {
289                 lbs_deb_net("set MAC address failed\n");
290                 goto done;
291         }
292
293         memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
294         memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
295         if (priv->mesh_dev)
296                 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
297
298 done:
299         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
300         return ret;
301 }
302
303
304 static inline int mac_in_list(unsigned char *list, int list_len,
305                               unsigned char *mac)
306 {
307         while (list_len) {
308                 if (!memcmp(list, mac, ETH_ALEN))
309                         return 1;
310                 list += ETH_ALEN;
311                 list_len--;
312         }
313         return 0;
314 }
315
316
317 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
318                                struct net_device *dev, int nr_addrs)
319 {
320         int i = nr_addrs;
321         struct dev_mc_list *mc_list;
322
323         if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
324                 return nr_addrs;
325
326         netif_addr_lock_bh(dev);
327         for (mc_list = dev->mc_list; mc_list; mc_list = mc_list->next) {
328                 if (mac_in_list(cmd->maclist, nr_addrs, mc_list->dmi_addr)) {
329                         lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
330                                     mc_list->dmi_addr);
331                         continue;
332                 }
333
334                 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
335                         break;
336                 memcpy(&cmd->maclist[6*i], mc_list->dmi_addr, ETH_ALEN);
337                 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
338                             mc_list->dmi_addr);
339                 i++;
340         }
341         netif_addr_unlock_bh(dev);
342         if (mc_list)
343                 return -EOVERFLOW;
344
345         return i;
346 }
347
348 static void lbs_set_mcast_worker(struct work_struct *work)
349 {
350         struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
351         struct cmd_ds_mac_multicast_adr mcast_cmd;
352         int dev_flags;
353         int nr_addrs;
354         int old_mac_control = priv->mac_control;
355
356         lbs_deb_enter(LBS_DEB_NET);
357
358         dev_flags = priv->dev->flags;
359         if (priv->mesh_dev)
360                 dev_flags |= priv->mesh_dev->flags;
361
362         if (dev_flags & IFF_PROMISC) {
363                 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
364                 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
365                                        CMD_ACT_MAC_MULTICAST_ENABLE);
366                 goto out_set_mac_control;
367         } else if (dev_flags & IFF_ALLMULTI) {
368         do_allmulti:
369                 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
370                 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
371                                        CMD_ACT_MAC_MULTICAST_ENABLE);
372                 goto out_set_mac_control;
373         }
374
375         /* Once for priv->dev, again for priv->mesh_dev if it exists */
376         nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
377         if (nr_addrs >= 0 && priv->mesh_dev)
378                 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
379         if (nr_addrs < 0)
380                 goto do_allmulti;
381
382         if (nr_addrs) {
383                 int size = offsetof(struct cmd_ds_mac_multicast_adr,
384                                     maclist[6*nr_addrs]);
385
386                 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
387                 mcast_cmd.hdr.size = cpu_to_le16(size);
388                 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
389
390                 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
391
392                 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
393         } else
394                 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
395
396         priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
397                                CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
398  out_set_mac_control:
399         if (priv->mac_control != old_mac_control)
400                 lbs_set_mac_control(priv);
401
402         lbs_deb_leave(LBS_DEB_NET);
403 }
404
405 void lbs_set_multicast_list(struct net_device *dev)
406 {
407         struct lbs_private *priv = dev->ml_priv;
408
409         schedule_work(&priv->mcast_work);
410 }
411
412 /**
413  *  @brief This function handles the major jobs in the LBS driver.
414  *  It handles all events generated by firmware, RX data received
415  *  from firmware and TX data sent from kernel.
416  *
417  *  @param data    A pointer to lbs_thread structure
418  *  @return        0
419  */
420 static int lbs_thread(void *data)
421 {
422         struct net_device *dev = data;
423         struct lbs_private *priv = dev->ml_priv;
424         wait_queue_t wait;
425
426         lbs_deb_enter(LBS_DEB_THREAD);
427
428         init_waitqueue_entry(&wait, current);
429
430         for (;;) {
431                 int shouldsleep;
432                 u8 resp_idx;
433
434                 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
435                                 priv->currenttxskb, priv->dnld_sent);
436
437                 add_wait_queue(&priv->waitq, &wait);
438                 set_current_state(TASK_INTERRUPTIBLE);
439                 spin_lock_irq(&priv->driver_lock);
440
441                 if (kthread_should_stop())
442                         shouldsleep = 0;        /* Bye */
443                 else if (priv->surpriseremoved)
444                         shouldsleep = 1;        /* We need to wait until we're _told_ to die */
445                 else if (priv->psstate == PS_STATE_SLEEP)
446                         shouldsleep = 1;        /* Sleep mode. Nothing we can do till it wakes */
447                 else if (priv->cmd_timed_out)
448                         shouldsleep = 0;        /* Command timed out. Recover */
449                 else if (!priv->fw_ready)
450                         shouldsleep = 1;        /* Firmware not ready. We're waiting for it */
451                 else if (priv->dnld_sent)
452                         shouldsleep = 1;        /* Something is en route to the device already */
453                 else if (priv->tx_pending_len > 0)
454                         shouldsleep = 0;        /* We've a packet to send */
455                 else if (priv->resp_len[priv->resp_idx])
456                         shouldsleep = 0;        /* We have a command response */
457                 else if (priv->cur_cmd)
458                         shouldsleep = 1;        /* Can't send a command; one already running */
459                 else if (!list_empty(&priv->cmdpendingq) &&
460                                         !(priv->wakeup_dev_required))
461                         shouldsleep = 0;        /* We have a command to send */
462                 else if (__kfifo_len(priv->event_fifo))
463                         shouldsleep = 0;        /* We have an event to process */
464                 else
465                         shouldsleep = 1;        /* No command */
466
467                 if (shouldsleep) {
468                         lbs_deb_thread("sleeping, connect_status %d, "
469                                 "psmode %d, psstate %d\n",
470                                 priv->connect_status,
471                                 priv->psmode, priv->psstate);
472                         spin_unlock_irq(&priv->driver_lock);
473                         schedule();
474                 } else
475                         spin_unlock_irq(&priv->driver_lock);
476
477                 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
478                                priv->currenttxskb, priv->dnld_sent);
479
480                 set_current_state(TASK_RUNNING);
481                 remove_wait_queue(&priv->waitq, &wait);
482
483                 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
484                                priv->currenttxskb, priv->dnld_sent);
485
486                 if (kthread_should_stop()) {
487                         lbs_deb_thread("break from main thread\n");
488                         break;
489                 }
490
491                 if (priv->surpriseremoved) {
492                         lbs_deb_thread("adapter removed; waiting to die...\n");
493                         continue;
494                 }
495
496                 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
497                        priv->currenttxskb, priv->dnld_sent);
498
499                 /* Process any pending command response */
500                 spin_lock_irq(&priv->driver_lock);
501                 resp_idx = priv->resp_idx;
502                 if (priv->resp_len[resp_idx]) {
503                         spin_unlock_irq(&priv->driver_lock);
504                         lbs_process_command_response(priv,
505                                 priv->resp_buf[resp_idx],
506                                 priv->resp_len[resp_idx]);
507                         spin_lock_irq(&priv->driver_lock);
508                         priv->resp_len[resp_idx] = 0;
509                 }
510                 spin_unlock_irq(&priv->driver_lock);
511
512                 /* Process hardware events, e.g. card removed, link lost */
513                 spin_lock_irq(&priv->driver_lock);
514                 while (__kfifo_len(priv->event_fifo)) {
515                         u32 event;
516                         __kfifo_get(priv->event_fifo, (unsigned char *) &event,
517                                 sizeof(event));
518                         spin_unlock_irq(&priv->driver_lock);
519                         lbs_process_event(priv, event);
520                         spin_lock_irq(&priv->driver_lock);
521                 }
522                 spin_unlock_irq(&priv->driver_lock);
523
524                 if (priv->wakeup_dev_required) {
525                         lbs_deb_thread("Waking up device...\n");
526                         /* Wake up device */
527                         if (priv->exit_deep_sleep(priv))
528                                 lbs_deb_thread("Wakeup device failed\n");
529                         continue;
530                 }
531
532                 /* command timeout stuff */
533                 if (priv->cmd_timed_out && priv->cur_cmd) {
534                         struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
535
536                         if (++priv->nr_retries > 3) {
537                                 lbs_pr_info("Excessive timeouts submitting "
538                                         "command 0x%04x\n",
539                                         le16_to_cpu(cmdnode->cmdbuf->command));
540                                 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
541                                 priv->nr_retries = 0;
542                                 if (priv->reset_card)
543                                         priv->reset_card(priv);
544                         } else {
545                                 priv->cur_cmd = NULL;
546                                 priv->dnld_sent = DNLD_RES_RECEIVED;
547                                 lbs_pr_info("requeueing command 0x%04x due "
548                                         "to timeout (#%d)\n",
549                                         le16_to_cpu(cmdnode->cmdbuf->command),
550                                         priv->nr_retries);
551
552                                 /* Stick it back at the _top_ of the pending queue
553                                    for immediate resubmission */
554                                 list_add(&cmdnode->list, &priv->cmdpendingq);
555                         }
556                 }
557                 priv->cmd_timed_out = 0;
558
559
560
561                 if (!priv->fw_ready)
562                         continue;
563
564                 /* Check if we need to confirm Sleep Request received previously */
565                 if (priv->psstate == PS_STATE_PRE_SLEEP &&
566                     !priv->dnld_sent && !priv->cur_cmd) {
567                         if (priv->connect_status == LBS_CONNECTED) {
568                                 lbs_deb_thread("pre-sleep, currenttxskb %p, "
569                                         "dnld_sent %d, cur_cmd %p\n",
570                                         priv->currenttxskb, priv->dnld_sent,
571                                         priv->cur_cmd);
572
573                                 lbs_ps_confirm_sleep(priv);
574                         } else {
575                                 /* workaround for firmware sending
576                                  * deauth/linkloss event immediately
577                                  * after sleep request; remove this
578                                  * after firmware fixes it
579                                  */
580                                 priv->psstate = PS_STATE_AWAKE;
581                                 lbs_pr_alert("ignore PS_SleepConfirm in "
582                                         "non-connected state\n");
583                         }
584                 }
585
586                 /* The PS state is changed during processing of Sleep Request
587                  * event above
588                  */
589                 if ((priv->psstate == PS_STATE_SLEEP) ||
590                     (priv->psstate == PS_STATE_PRE_SLEEP))
591                         continue;
592
593                 if (priv->is_deep_sleep)
594                         continue;
595
596                 /* Execute the next command */
597                 if (!priv->dnld_sent && !priv->cur_cmd)
598                         lbs_execute_next_command(priv);
599
600                 /* Wake-up command waiters which can't sleep in
601                  * lbs_prepare_and_send_command
602                  */
603                 if (!list_empty(&priv->cmdpendingq))
604                         wake_up_all(&priv->cmd_pending);
605
606                 spin_lock_irq(&priv->driver_lock);
607                 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
608                         int ret = priv->hw_host_to_card(priv, MVMS_DAT,
609                                                         priv->tx_pending_buf,
610                                                         priv->tx_pending_len);
611                         if (ret) {
612                                 lbs_deb_tx("host_to_card failed %d\n", ret);
613                                 priv->dnld_sent = DNLD_RES_RECEIVED;
614                         }
615                         priv->tx_pending_len = 0;
616                         if (!priv->currenttxskb) {
617                                 /* We can wake the queues immediately if we aren't
618                                    waiting for TX feedback */
619                                 if (priv->connect_status == LBS_CONNECTED)
620                                         netif_wake_queue(priv->dev);
621                                 if (priv->mesh_dev &&
622                                     priv->mesh_connect_status == LBS_CONNECTED)
623                                         netif_wake_queue(priv->mesh_dev);
624                         }
625                 }
626                 spin_unlock_irq(&priv->driver_lock);
627         }
628
629         del_timer(&priv->command_timer);
630         del_timer(&priv->auto_deepsleep_timer);
631         wake_up_all(&priv->cmd_pending);
632
633         lbs_deb_leave(LBS_DEB_THREAD);
634         return 0;
635 }
636
637 static int lbs_suspend_callback(struct lbs_private *priv, unsigned long dummy,
638                                 struct cmd_header *cmd)
639 {
640         lbs_deb_enter(LBS_DEB_FW);
641
642         netif_device_detach(priv->dev);
643         if (priv->mesh_dev)
644                 netif_device_detach(priv->mesh_dev);
645
646         priv->fw_ready = 0;
647         lbs_deb_leave(LBS_DEB_FW);
648         return 0;
649 }
650
651 int lbs_suspend(struct lbs_private *priv)
652 {
653         struct cmd_header cmd;
654         int ret;
655
656         lbs_deb_enter(LBS_DEB_FW);
657
658         if (priv->wol_criteria == 0xffffffff) {
659                 lbs_pr_info("Suspend attempt without configuring wake params!\n");
660                 return -EINVAL;
661         }
662
663         memset(&cmd, 0, sizeof(cmd));
664
665         ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_ACTIVATE, &cmd,
666                         sizeof(cmd), lbs_suspend_callback, 0);
667         if (ret)
668                 lbs_pr_info("HOST_SLEEP_ACTIVATE failed: %d\n", ret);
669
670         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
671         return ret;
672 }
673 EXPORT_SYMBOL_GPL(lbs_suspend);
674
675 void lbs_resume(struct lbs_private *priv)
676 {
677         lbs_deb_enter(LBS_DEB_FW);
678
679         priv->fw_ready = 1;
680
681         /* Firmware doesn't seem to give us RX packets any more
682            until we send it some command. Might as well update */
683         lbs_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
684                                      0, 0, NULL);
685
686         netif_device_attach(priv->dev);
687         if (priv->mesh_dev)
688                 netif_device_attach(priv->mesh_dev);
689
690         lbs_deb_leave(LBS_DEB_FW);
691 }
692 EXPORT_SYMBOL_GPL(lbs_resume);
693
694 /**
695  * @brief This function gets the HW spec from the firmware and sets
696  *        some basic parameters.
697  *
698  *  @param priv    A pointer to struct lbs_private structure
699  *  @return        0 or -1
700  */
701 static int lbs_setup_firmware(struct lbs_private *priv)
702 {
703         int ret = -1;
704         s16 curlevel = 0, minlevel = 0, maxlevel = 0;
705
706         lbs_deb_enter(LBS_DEB_FW);
707
708         /* Read MAC address from firmware */
709         memset(priv->current_addr, 0xff, ETH_ALEN);
710         ret = lbs_update_hw_spec(priv);
711         if (ret)
712                 goto done;
713
714         /* Read power levels if available */
715         ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
716         if (ret == 0) {
717                 priv->txpower_cur = curlevel;
718                 priv->txpower_min = minlevel;
719                 priv->txpower_max = maxlevel;
720         }
721
722         lbs_set_mac_control(priv);
723 done:
724         lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
725         return ret;
726 }
727
728 /**
729  *  This function handles the timeout of command sending.
730  *  It will re-send the same command again.
731  */
732 static void command_timer_fn(unsigned long data)
733 {
734         struct lbs_private *priv = (struct lbs_private *)data;
735         unsigned long flags;
736
737         lbs_deb_enter(LBS_DEB_CMD);
738         spin_lock_irqsave(&priv->driver_lock, flags);
739
740         if (!priv->cur_cmd)
741                 goto out;
742
743         lbs_pr_info("command 0x%04x timed out\n",
744                 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
745
746         priv->cmd_timed_out = 1;
747         wake_up_interruptible(&priv->waitq);
748 out:
749         spin_unlock_irqrestore(&priv->driver_lock, flags);
750         lbs_deb_leave(LBS_DEB_CMD);
751 }
752
753 /**
754  *  This function put the device back to deep sleep mode when timer expires
755  *  and no activity (command, event, data etc.) is detected.
756  */
757 static void auto_deepsleep_timer_fn(unsigned long data)
758 {
759         struct lbs_private *priv = (struct lbs_private *)data;
760         int ret;
761
762         lbs_deb_enter(LBS_DEB_CMD);
763
764         if (priv->is_activity_detected) {
765                 priv->is_activity_detected = 0;
766         } else {
767                 if (priv->is_auto_deep_sleep_enabled &&
768                                 (!priv->wakeup_dev_required) &&
769                                 (priv->connect_status != LBS_CONNECTED)) {
770                         lbs_deb_main("Entering auto deep sleep mode...\n");
771                         ret = lbs_prepare_and_send_command(priv,
772                                         CMD_802_11_DEEP_SLEEP, 0,
773                                         0, 0, NULL);
774                         if (ret)
775                                 lbs_pr_err("Enter Deep Sleep command failed\n");
776                 }
777         }
778         mod_timer(&priv->auto_deepsleep_timer , jiffies +
779                                 (priv->auto_deep_sleep_timeout * HZ)/1000);
780         lbs_deb_leave(LBS_DEB_CMD);
781 }
782
783 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
784 {
785         lbs_deb_enter(LBS_DEB_SDIO);
786
787         priv->is_auto_deep_sleep_enabled = 1;
788         if (priv->is_deep_sleep)
789                 priv->wakeup_dev_required = 1;
790         mod_timer(&priv->auto_deepsleep_timer ,
791                         jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
792
793         lbs_deb_leave(LBS_DEB_SDIO);
794         return 0;
795 }
796
797 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
798 {
799         lbs_deb_enter(LBS_DEB_SDIO);
800
801         priv->is_auto_deep_sleep_enabled = 0;
802         priv->auto_deep_sleep_timeout = 0;
803         del_timer(&priv->auto_deepsleep_timer);
804
805         lbs_deb_leave(LBS_DEB_SDIO);
806         return 0;
807 }
808
809 static int lbs_init_adapter(struct lbs_private *priv)
810 {
811         size_t bufsize;
812         int i, ret = 0;
813
814         lbs_deb_enter(LBS_DEB_MAIN);
815
816         /* Allocate buffer to store the BSSID list */
817         bufsize = MAX_NETWORK_COUNT * sizeof(struct bss_descriptor);
818         priv->networks = kzalloc(bufsize, GFP_KERNEL);
819         if (!priv->networks) {
820                 lbs_pr_err("Out of memory allocating beacons\n");
821                 ret = -1;
822                 goto out;
823         }
824
825         /* Initialize scan result lists */
826         INIT_LIST_HEAD(&priv->network_free_list);
827         INIT_LIST_HEAD(&priv->network_list);
828         for (i = 0; i < MAX_NETWORK_COUNT; i++) {
829                 list_add_tail(&priv->networks[i].list,
830                               &priv->network_free_list);
831         }
832
833         memset(priv->current_addr, 0xff, ETH_ALEN);
834
835         priv->connect_status = LBS_DISCONNECTED;
836         priv->mesh_connect_status = LBS_DISCONNECTED;
837         priv->secinfo.auth_mode = IW_AUTH_ALG_OPEN_SYSTEM;
838         priv->mode = IW_MODE_INFRA;
839         priv->channel = DEFAULT_AD_HOC_CHANNEL;
840         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
841         priv->radio_on = 1;
842         priv->enablehwauto = 1;
843         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
844         priv->psmode = LBS802_11POWERMODECAM;
845         priv->psstate = PS_STATE_FULL_POWER;
846         priv->is_deep_sleep = 0;
847         priv->is_auto_deep_sleep_enabled = 0;
848         priv->wakeup_dev_required = 0;
849         init_waitqueue_head(&priv->ds_awake_q);
850
851         mutex_init(&priv->lock);
852
853         setup_timer(&priv->command_timer, command_timer_fn,
854                 (unsigned long)priv);
855         setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
856                         (unsigned long)priv);
857
858         INIT_LIST_HEAD(&priv->cmdfreeq);
859         INIT_LIST_HEAD(&priv->cmdpendingq);
860
861         spin_lock_init(&priv->driver_lock);
862         init_waitqueue_head(&priv->cmd_pending);
863
864         /* Allocate the command buffers */
865         if (lbs_allocate_cmd_buffer(priv)) {
866                 lbs_pr_err("Out of memory allocating command buffers\n");
867                 ret = -ENOMEM;
868                 goto out;
869         }
870         priv->resp_idx = 0;
871         priv->resp_len[0] = priv->resp_len[1] = 0;
872
873         /* Create the event FIFO */
874         priv->event_fifo = kfifo_alloc(sizeof(u32) * 16, GFP_KERNEL, NULL);
875         if (IS_ERR(priv->event_fifo)) {
876                 lbs_pr_err("Out of memory allocating event FIFO buffer\n");
877                 ret = -ENOMEM;
878                 goto out;
879         }
880
881 out:
882         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
883
884         return ret;
885 }
886
887 static void lbs_free_adapter(struct lbs_private *priv)
888 {
889         lbs_deb_enter(LBS_DEB_MAIN);
890
891         lbs_free_cmd_buffer(priv);
892         if (priv->event_fifo)
893                 kfifo_free(priv->event_fifo);
894         del_timer(&priv->command_timer);
895         del_timer(&priv->auto_deepsleep_timer);
896         kfree(priv->networks);
897         priv->networks = NULL;
898
899         lbs_deb_leave(LBS_DEB_MAIN);
900 }
901
902 static const struct net_device_ops lbs_netdev_ops = {
903         .ndo_open               = lbs_dev_open,
904         .ndo_stop               = lbs_eth_stop,
905         .ndo_start_xmit         = lbs_hard_start_xmit,
906         .ndo_set_mac_address    = lbs_set_mac_address,
907         .ndo_tx_timeout         = lbs_tx_timeout,
908         .ndo_set_multicast_list = lbs_set_multicast_list,
909         .ndo_change_mtu         = eth_change_mtu,
910         .ndo_validate_addr      = eth_validate_addr,
911 };
912
913 /**
914  * @brief This function adds the card. it will probe the
915  * card, allocate the lbs_priv and initialize the device.
916  *
917  *  @param card    A pointer to card
918  *  @return        A pointer to struct lbs_private structure
919  */
920 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
921 {
922         struct net_device *dev;
923         struct wireless_dev *wdev;
924         struct lbs_private *priv = NULL;
925
926         lbs_deb_enter(LBS_DEB_MAIN);
927
928         /* Allocate an Ethernet device and register it */
929         wdev = lbs_cfg_alloc(dmdev);
930         if (IS_ERR(wdev)) {
931                 lbs_pr_err("cfg80211 init failed\n");
932                 goto done;
933         }
934         /* TODO? */
935         wdev->iftype = NL80211_IFTYPE_STATION;
936         priv = wdev_priv(wdev);
937         priv->wdev = wdev;
938
939         if (lbs_init_adapter(priv)) {
940                 lbs_pr_err("failed to initialize adapter structure.\n");
941                 goto err_wdev;
942         }
943
944         //TODO? dev = alloc_netdev_mq(0, "wlan%d", ether_setup, IWM_TX_QUEUES);
945         dev = alloc_netdev(0, "wlan%d", ether_setup);
946         if (!dev) {
947                 dev_err(dmdev, "no memory for network device instance\n");
948                 goto err_adapter;
949         }
950
951         dev->ieee80211_ptr = wdev;
952         dev->ml_priv = priv;
953         SET_NETDEV_DEV(dev, dmdev);
954         wdev->netdev = dev;
955         priv->dev = dev;
956
957         dev->netdev_ops = &lbs_netdev_ops;
958         dev->watchdog_timeo = 5 * HZ;
959         dev->ethtool_ops = &lbs_ethtool_ops;
960 #ifdef  WIRELESS_EXT
961         dev->wireless_handlers = &lbs_handler_def;
962 #endif
963         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
964
965
966         // TODO: kzalloc + iwm_init_default_profile(iwm, iwm->umac_profile); ??
967
968
969         priv->card = card;
970         priv->infra_open = 0;
971
972
973         priv->rtap_net_dev = NULL;
974         strcpy(dev->name, "wlan%d");
975
976         lbs_deb_thread("Starting main thread...\n");
977         init_waitqueue_head(&priv->waitq);
978         priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
979         if (IS_ERR(priv->main_thread)) {
980                 lbs_deb_thread("Error creating main thread.\n");
981                 goto err_ndev;
982         }
983
984         priv->work_thread = create_singlethread_workqueue("lbs_worker");
985         INIT_DELAYED_WORK(&priv->assoc_work, lbs_association_worker);
986         INIT_DELAYED_WORK(&priv->scan_work, lbs_scan_worker);
987         INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
988
989         priv->wol_criteria = 0xffffffff;
990         priv->wol_gpio = 0xff;
991
992         goto done;
993
994  err_ndev:
995         free_netdev(dev);
996
997  err_adapter:
998         lbs_free_adapter(priv);
999
1000  err_wdev:
1001         lbs_cfg_free(priv);
1002
1003         priv = NULL;
1004
1005 done:
1006         lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1007         return priv;
1008 }
1009 EXPORT_SYMBOL_GPL(lbs_add_card);
1010
1011
1012 void lbs_remove_card(struct lbs_private *priv)
1013 {
1014         struct net_device *dev = priv->dev;
1015
1016         lbs_deb_enter(LBS_DEB_MAIN);
1017
1018         lbs_remove_mesh(priv);
1019         lbs_remove_rtap(priv);
1020
1021         dev = priv->dev;
1022
1023         cancel_delayed_work_sync(&priv->scan_work);
1024         cancel_delayed_work_sync(&priv->assoc_work);
1025         cancel_work_sync(&priv->mcast_work);
1026
1027         /* worker thread destruction blocks on the in-flight command which
1028          * should have been cleared already in lbs_stop_card().
1029          */
1030         lbs_deb_main("destroying worker thread\n");
1031         destroy_workqueue(priv->work_thread);
1032         lbs_deb_main("done destroying worker thread\n");
1033
1034         if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1035                 priv->psmode = LBS802_11POWERMODECAM;
1036                 lbs_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
1037         }
1038
1039         lbs_send_disconnect_notification(priv);
1040
1041         if (priv->is_deep_sleep) {
1042                 priv->is_deep_sleep = 0;
1043                 wake_up_interruptible(&priv->ds_awake_q);
1044         }
1045
1046         /* Stop the thread servicing the interrupts */
1047         priv->surpriseremoved = 1;
1048         kthread_stop(priv->main_thread);
1049
1050         lbs_free_adapter(priv);
1051         lbs_cfg_free(priv);
1052
1053         priv->dev = NULL;
1054         free_netdev(dev);
1055
1056         lbs_deb_leave(LBS_DEB_MAIN);
1057 }
1058 EXPORT_SYMBOL_GPL(lbs_remove_card);
1059
1060
1061 static int lbs_rtap_supported(struct lbs_private *priv)
1062 {
1063         if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1064                 return 1;
1065
1066         /* newer firmware use a capability mask */
1067         return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1068                 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1069 }
1070
1071
1072 int lbs_start_card(struct lbs_private *priv)
1073 {
1074         struct net_device *dev = priv->dev;
1075         int ret = -1;
1076
1077         lbs_deb_enter(LBS_DEB_MAIN);
1078
1079         /* poke the firmware */
1080         ret = lbs_setup_firmware(priv);
1081         if (ret)
1082                 goto done;
1083
1084         if (lbs_cfg_register(priv)) {
1085                 lbs_pr_err("cannot register device\n");
1086                 goto done;
1087         }
1088
1089         lbs_update_channel(priv);
1090
1091         lbs_init_mesh(priv);
1092
1093         /*
1094          * While rtap isn't related to mesh, only mesh-enabled
1095          * firmware implements the rtap functionality via
1096          * CMD_802_11_MONITOR_MODE.
1097          */
1098         if (lbs_rtap_supported(priv)) {
1099                 if (device_create_file(&dev->dev, &dev_attr_lbs_rtap))
1100                         lbs_pr_err("cannot register lbs_rtap attribute\n");
1101         }
1102
1103         lbs_debugfs_init_one(priv, dev);
1104
1105         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
1106
1107         ret = 0;
1108
1109 done:
1110         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1111         return ret;
1112 }
1113 EXPORT_SYMBOL_GPL(lbs_start_card);
1114
1115
1116 void lbs_stop_card(struct lbs_private *priv)
1117 {
1118         struct net_device *dev;
1119         struct cmd_ctrl_node *cmdnode;
1120         unsigned long flags;
1121
1122         lbs_deb_enter(LBS_DEB_MAIN);
1123
1124         if (!priv)
1125                 goto out;
1126         dev = priv->dev;
1127
1128         netif_stop_queue(dev);
1129         netif_carrier_off(dev);
1130
1131         lbs_debugfs_remove_one(priv);
1132         lbs_deinit_mesh(priv);
1133
1134         if (lbs_rtap_supported(priv))
1135                 device_remove_file(&dev->dev, &dev_attr_lbs_rtap);
1136
1137         /* Delete the timeout of the currently processing command */
1138         del_timer_sync(&priv->command_timer);
1139         del_timer_sync(&priv->auto_deepsleep_timer);
1140
1141         /* Flush pending command nodes */
1142         spin_lock_irqsave(&priv->driver_lock, flags);
1143         lbs_deb_main("clearing pending commands\n");
1144         list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
1145                 cmdnode->result = -ENOENT;
1146                 cmdnode->cmdwaitqwoken = 1;
1147                 wake_up_interruptible(&cmdnode->cmdwait_q);
1148         }
1149
1150         /* Flush the command the card is currently processing */
1151         if (priv->cur_cmd) {
1152                 lbs_deb_main("clearing current command\n");
1153                 priv->cur_cmd->result = -ENOENT;
1154                 priv->cur_cmd->cmdwaitqwoken = 1;
1155                 wake_up_interruptible(&priv->cur_cmd->cmdwait_q);
1156         }
1157         lbs_deb_main("done clearing commands\n");
1158         spin_unlock_irqrestore(&priv->driver_lock, flags);
1159
1160         unregister_netdev(dev);
1161
1162 out:
1163         lbs_deb_leave(LBS_DEB_MAIN);
1164 }
1165 EXPORT_SYMBOL_GPL(lbs_stop_card);
1166
1167
1168 void lbs_queue_event(struct lbs_private *priv, u32 event)
1169 {
1170         unsigned long flags;
1171
1172         lbs_deb_enter(LBS_DEB_THREAD);
1173         spin_lock_irqsave(&priv->driver_lock, flags);
1174
1175         if (priv->psstate == PS_STATE_SLEEP)
1176                 priv->psstate = PS_STATE_AWAKE;
1177
1178         __kfifo_put(priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1179
1180         wake_up_interruptible(&priv->waitq);
1181
1182         spin_unlock_irqrestore(&priv->driver_lock, flags);
1183         lbs_deb_leave(LBS_DEB_THREAD);
1184 }
1185 EXPORT_SYMBOL_GPL(lbs_queue_event);
1186
1187 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1188 {
1189         lbs_deb_enter(LBS_DEB_THREAD);
1190
1191         if (priv->psstate == PS_STATE_SLEEP)
1192                 priv->psstate = PS_STATE_AWAKE;
1193
1194         /* Swap buffers by flipping the response index */
1195         BUG_ON(resp_idx > 1);
1196         priv->resp_idx = resp_idx;
1197
1198         wake_up_interruptible(&priv->waitq);
1199
1200         lbs_deb_leave(LBS_DEB_THREAD);
1201 }
1202 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1203
1204 static int __init lbs_init_module(void)
1205 {
1206         lbs_deb_enter(LBS_DEB_MAIN);
1207         memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1208         confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1209         confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1210         confirm_sleep.action = cpu_to_le16(CMD_SUBCMD_SLEEP_CONFIRMED);
1211         lbs_debugfs_init();
1212         lbs_deb_leave(LBS_DEB_MAIN);
1213         return 0;
1214 }
1215
1216 static void __exit lbs_exit_module(void)
1217 {
1218         lbs_deb_enter(LBS_DEB_MAIN);
1219         lbs_debugfs_remove();
1220         lbs_deb_leave(LBS_DEB_MAIN);
1221 }
1222
1223 /*
1224  * rtap interface support fuctions
1225  */
1226
1227 static int lbs_rtap_open(struct net_device *dev)
1228 {
1229         /* Yes, _stop_ the queue. Because we don't support injection */
1230         lbs_deb_enter(LBS_DEB_MAIN);
1231         netif_carrier_off(dev);
1232         netif_stop_queue(dev);
1233         lbs_deb_leave(LBS_DEB_LEAVE);
1234         return 0;
1235 }
1236
1237 static int lbs_rtap_stop(struct net_device *dev)
1238 {
1239         lbs_deb_enter(LBS_DEB_MAIN);
1240         lbs_deb_leave(LBS_DEB_MAIN);
1241         return 0;
1242 }
1243
1244 static netdev_tx_t lbs_rtap_hard_start_xmit(struct sk_buff *skb,
1245                                             struct net_device *dev)
1246 {
1247         netif_stop_queue(dev);
1248         return NETDEV_TX_BUSY;
1249 }
1250
1251 static void lbs_remove_rtap(struct lbs_private *priv)
1252 {
1253         lbs_deb_enter(LBS_DEB_MAIN);
1254         if (priv->rtap_net_dev == NULL)
1255                 goto out;
1256         unregister_netdev(priv->rtap_net_dev);
1257         free_netdev(priv->rtap_net_dev);
1258         priv->rtap_net_dev = NULL;
1259 out:
1260         lbs_deb_leave(LBS_DEB_MAIN);
1261 }
1262
1263 static const struct net_device_ops rtap_netdev_ops = {
1264         .ndo_open = lbs_rtap_open,
1265         .ndo_stop = lbs_rtap_stop,
1266         .ndo_start_xmit = lbs_rtap_hard_start_xmit,
1267 };
1268
1269 static int lbs_add_rtap(struct lbs_private *priv)
1270 {
1271         int ret = 0;
1272         struct net_device *rtap_dev;
1273
1274         lbs_deb_enter(LBS_DEB_MAIN);
1275         if (priv->rtap_net_dev) {
1276                 ret = -EPERM;
1277                 goto out;
1278         }
1279
1280         rtap_dev = alloc_netdev(0, "rtap%d", ether_setup);
1281         if (rtap_dev == NULL) {
1282                 ret = -ENOMEM;
1283                 goto out;
1284         }
1285
1286         memcpy(rtap_dev->dev_addr, priv->current_addr, ETH_ALEN);
1287         rtap_dev->type = ARPHRD_IEEE80211_RADIOTAP;
1288         rtap_dev->netdev_ops = &rtap_netdev_ops;
1289         rtap_dev->ml_priv = priv;
1290         SET_NETDEV_DEV(rtap_dev, priv->dev->dev.parent);
1291
1292         ret = register_netdev(rtap_dev);
1293         if (ret) {
1294                 free_netdev(rtap_dev);
1295                 goto out;
1296         }
1297         priv->rtap_net_dev = rtap_dev;
1298
1299 out:
1300         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1301         return ret;
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");