Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[linux-2.6] / 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/freezer.h>
10 #include <linux/etherdevice.h>
11 #include <linux/netdevice.h>
12 #include <linux/if_arp.h>
13
14 #include <net/iw_handler.h>
15 #include <net/ieee80211.h>
16
17 #include "host.h"
18 #include "decl.h"
19 #include "dev.h"
20 #include "wext.h"
21 #include "debugfs.h"
22 #include "assoc.h"
23
24 #define DRIVER_RELEASE_VERSION "322.p0"
25 const char libertas_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
26 #ifdef  DEBUG
27     "-dbg"
28 #endif
29     "";
30
31
32 /* Module parameters */
33 unsigned int libertas_debug = 0;
34 module_param(libertas_debug, int, 0644);
35 EXPORT_SYMBOL_GPL(libertas_debug);
36
37
38 #define WLAN_TX_PWR_DEFAULT             20      /*100mW */
39 #define WLAN_TX_PWR_US_DEFAULT          20      /*100mW */
40 #define WLAN_TX_PWR_JP_DEFAULT          16      /*50mW */
41 #define WLAN_TX_PWR_FR_DEFAULT          20      /*100mW */
42 #define WLAN_TX_PWR_EMEA_DEFAULT        20      /*100mW */
43
44 /* Format { channel, frequency (MHz), maxtxpower } */
45 /* band: 'B/G', region: USA FCC/Canada IC */
46 static struct chan_freq_power channel_freq_power_US_BG[] = {
47         {1, 2412, WLAN_TX_PWR_US_DEFAULT},
48         {2, 2417, WLAN_TX_PWR_US_DEFAULT},
49         {3, 2422, WLAN_TX_PWR_US_DEFAULT},
50         {4, 2427, WLAN_TX_PWR_US_DEFAULT},
51         {5, 2432, WLAN_TX_PWR_US_DEFAULT},
52         {6, 2437, WLAN_TX_PWR_US_DEFAULT},
53         {7, 2442, WLAN_TX_PWR_US_DEFAULT},
54         {8, 2447, WLAN_TX_PWR_US_DEFAULT},
55         {9, 2452, WLAN_TX_PWR_US_DEFAULT},
56         {10, 2457, WLAN_TX_PWR_US_DEFAULT},
57         {11, 2462, WLAN_TX_PWR_US_DEFAULT}
58 };
59
60 /* band: 'B/G', region: Europe ETSI */
61 static struct chan_freq_power channel_freq_power_EU_BG[] = {
62         {1, 2412, WLAN_TX_PWR_EMEA_DEFAULT},
63         {2, 2417, WLAN_TX_PWR_EMEA_DEFAULT},
64         {3, 2422, WLAN_TX_PWR_EMEA_DEFAULT},
65         {4, 2427, WLAN_TX_PWR_EMEA_DEFAULT},
66         {5, 2432, WLAN_TX_PWR_EMEA_DEFAULT},
67         {6, 2437, WLAN_TX_PWR_EMEA_DEFAULT},
68         {7, 2442, WLAN_TX_PWR_EMEA_DEFAULT},
69         {8, 2447, WLAN_TX_PWR_EMEA_DEFAULT},
70         {9, 2452, WLAN_TX_PWR_EMEA_DEFAULT},
71         {10, 2457, WLAN_TX_PWR_EMEA_DEFAULT},
72         {11, 2462, WLAN_TX_PWR_EMEA_DEFAULT},
73         {12, 2467, WLAN_TX_PWR_EMEA_DEFAULT},
74         {13, 2472, WLAN_TX_PWR_EMEA_DEFAULT}
75 };
76
77 /* band: 'B/G', region: Spain */
78 static struct chan_freq_power channel_freq_power_SPN_BG[] = {
79         {10, 2457, WLAN_TX_PWR_DEFAULT},
80         {11, 2462, WLAN_TX_PWR_DEFAULT}
81 };
82
83 /* band: 'B/G', region: France */
84 static struct chan_freq_power channel_freq_power_FR_BG[] = {
85         {10, 2457, WLAN_TX_PWR_FR_DEFAULT},
86         {11, 2462, WLAN_TX_PWR_FR_DEFAULT},
87         {12, 2467, WLAN_TX_PWR_FR_DEFAULT},
88         {13, 2472, WLAN_TX_PWR_FR_DEFAULT}
89 };
90
91 /* band: 'B/G', region: Japan */
92 static struct chan_freq_power channel_freq_power_JPN_BG[] = {
93         {1, 2412, WLAN_TX_PWR_JP_DEFAULT},
94         {2, 2417, WLAN_TX_PWR_JP_DEFAULT},
95         {3, 2422, WLAN_TX_PWR_JP_DEFAULT},
96         {4, 2427, WLAN_TX_PWR_JP_DEFAULT},
97         {5, 2432, WLAN_TX_PWR_JP_DEFAULT},
98         {6, 2437, WLAN_TX_PWR_JP_DEFAULT},
99         {7, 2442, WLAN_TX_PWR_JP_DEFAULT},
100         {8, 2447, WLAN_TX_PWR_JP_DEFAULT},
101         {9, 2452, WLAN_TX_PWR_JP_DEFAULT},
102         {10, 2457, WLAN_TX_PWR_JP_DEFAULT},
103         {11, 2462, WLAN_TX_PWR_JP_DEFAULT},
104         {12, 2467, WLAN_TX_PWR_JP_DEFAULT},
105         {13, 2472, WLAN_TX_PWR_JP_DEFAULT},
106         {14, 2484, WLAN_TX_PWR_JP_DEFAULT}
107 };
108
109 /**
110  * the structure for channel, frequency and power
111  */
112 struct region_cfp_table {
113         u8 region;
114         struct chan_freq_power *cfp_BG;
115         int cfp_no_BG;
116 };
117
118 /**
119  * the structure for the mapping between region and CFP
120  */
121 static struct region_cfp_table region_cfp_table[] = {
122         {0x10,                  /*US FCC */
123          channel_freq_power_US_BG,
124          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
125          }
126         ,
127         {0x20,                  /*CANADA IC */
128          channel_freq_power_US_BG,
129          sizeof(channel_freq_power_US_BG) / sizeof(struct chan_freq_power),
130          }
131         ,
132         {0x30, /*EU*/ channel_freq_power_EU_BG,
133          sizeof(channel_freq_power_EU_BG) / sizeof(struct chan_freq_power),
134          }
135         ,
136         {0x31, /*SPAIN*/ channel_freq_power_SPN_BG,
137          sizeof(channel_freq_power_SPN_BG) / sizeof(struct chan_freq_power),
138          }
139         ,
140         {0x32, /*FRANCE*/ channel_freq_power_FR_BG,
141          sizeof(channel_freq_power_FR_BG) / sizeof(struct chan_freq_power),
142          }
143         ,
144         {0x40, /*JAPAN*/ channel_freq_power_JPN_BG,
145          sizeof(channel_freq_power_JPN_BG) / sizeof(struct chan_freq_power),
146          }
147         ,
148 /*Add new region here */
149 };
150
151 /**
152  * the rates supported
153  */
154 u8 libertas_supported_rates[G_SUPPORTED_RATES] =
155     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
156 0 };
157
158 /**
159  * the rates supported for ad-hoc G mode
160  */
161 u8 libertas_adhoc_rates_g[G_SUPPORTED_RATES] =
162     { 0x82, 0x84, 0x8b, 0x96, 0x0c, 0x12, 0x18, 0x24, 0x30, 0x48, 0x60, 0x6c,
163 0 };
164
165 /**
166  * the rates supported for ad-hoc B mode
167  */
168 u8 libertas_adhoc_rates_b[4] = { 0x82, 0x84, 0x8b, 0x96 };
169
170 /**
171  * the table to keep region code
172  */
173 u16 libertas_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
174     { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };
175
176 /**
177  * Attributes exported through sysfs
178  */
179
180 /**
181  * @brief Get function for sysfs attribute anycast_mask
182  */
183 static ssize_t libertas_anycast_get(struct device * dev,
184                 struct device_attribute *attr, char * buf) {
185         struct cmd_ds_mesh_access mesh_access;
186
187         memset(&mesh_access, 0, sizeof(mesh_access));
188         libertas_prepare_and_send_command(to_net_dev(dev)->priv,
189                         cmd_mesh_access,
190                         cmd_act_mesh_get_anycast,
191                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
192
193         return snprintf(buf, 12, "0x%X\n", le32_to_cpu(mesh_access.data[0]));
194 }
195
196 /**
197  * @brief Set function for sysfs attribute anycast_mask
198  */
199 static ssize_t libertas_anycast_set(struct device * dev,
200                 struct device_attribute *attr, const char * buf, size_t count) {
201         struct cmd_ds_mesh_access mesh_access;
202         uint32_t datum;
203
204         memset(&mesh_access, 0, sizeof(mesh_access));
205         sscanf(buf, "%x", &datum);
206         mesh_access.data[0] = cpu_to_le32(datum);
207
208         libertas_prepare_and_send_command((to_net_dev(dev))->priv,
209                         cmd_mesh_access,
210                         cmd_act_mesh_set_anycast,
211                         cmd_option_waitforrsp, 0, (void *)&mesh_access);
212         return strlen(buf);
213 }
214
215 /**
216  * anycast_mask attribute to be exported per mshX interface
217  * through sysfs (/sys/class/net/mshX/anycast_mask)
218  */
219 static DEVICE_ATTR(anycast_mask, 0644, libertas_anycast_get, libertas_anycast_set);
220
221 /**
222  *  @brief Check if the device can be open and wait if necessary.
223  *
224  *  @param dev     A pointer to net_device structure
225  *  @return        0
226  *
227  * For USB adapter, on some systems the device open handler will be
228  * called before FW ready. Use the following flag check and wait
229  * function to work around the issue.
230  *
231  */
232 static int pre_open_check(struct net_device *dev)
233 {
234         wlan_private *priv = (wlan_private *) dev->priv;
235         wlan_adapter *adapter = priv->adapter;
236         int i = 0;
237
238         while (!adapter->fw_ready && i < 20) {
239                 i++;
240                 msleep_interruptible(100);
241         }
242         if (!adapter->fw_ready) {
243                 lbs_pr_err("firmware not ready\n");
244                 return -1;
245         }
246
247         return 0;
248 }
249
250 /**
251  *  @brief This function opens the device
252  *
253  *  @param dev     A pointer to net_device structure
254  *  @return        0
255  */
256 static int wlan_dev_open(struct net_device *dev)
257 {
258         wlan_private *priv = (wlan_private *) dev->priv;
259         wlan_adapter *adapter = priv->adapter;
260
261         lbs_deb_enter(LBS_DEB_NET);
262
263         priv->open = 1;
264
265         if (adapter->connect_status == libertas_connected) {
266                 netif_carrier_on(priv->dev);
267                 netif_carrier_on(priv->mesh_dev);
268         } else {
269                 netif_carrier_off(priv->dev);
270                 netif_carrier_off(priv->mesh_dev);
271         }
272
273         lbs_deb_leave(LBS_DEB_NET);
274         return 0;
275 }
276 /**
277  *  @brief This function opens the mshX interface
278  *
279  *  @param dev     A pointer to net_device structure
280  *  @return        0
281  */
282 static int mesh_open(struct net_device *dev)
283 {
284         wlan_private *priv = (wlan_private *) dev->priv ;
285
286         if (pre_open_check(dev) == -1)
287                 return -1;
288         priv->mesh_open = 1 ;
289         netif_wake_queue(priv->mesh_dev);
290         if (priv->infra_open == 0)
291                 return wlan_dev_open(priv->dev) ;
292         return 0;
293 }
294
295 /**
296  *  @brief This function opens the ethX interface
297  *
298  *  @param dev     A pointer to net_device structure
299  *  @return        0
300  */
301 static int wlan_open(struct net_device *dev)
302 {
303         wlan_private *priv = (wlan_private *) dev->priv ;
304
305         if(pre_open_check(dev) == -1)
306                 return -1;
307         priv->infra_open = 1 ;
308         netif_wake_queue(priv->dev);
309         if (priv->open == 0)
310                 return wlan_dev_open(priv->dev) ;
311         return 0;
312 }
313
314 static int wlan_dev_close(struct net_device *dev)
315 {
316         wlan_private *priv = dev->priv;
317
318         lbs_deb_enter(LBS_DEB_NET);
319
320         netif_carrier_off(priv->dev);
321         priv->open = 0;
322
323         lbs_deb_leave(LBS_DEB_NET);
324         return 0;
325 }
326
327 /**
328  *  @brief This function closes the mshX interface
329  *
330  *  @param dev     A pointer to net_device structure
331  *  @return        0
332  */
333 static int mesh_close(struct net_device *dev)
334 {
335         wlan_private *priv = (wlan_private *) (dev->priv);
336
337         priv->mesh_open = 0;
338         netif_stop_queue(priv->mesh_dev);
339         if (priv->infra_open == 0)
340                 return wlan_dev_close(dev);
341         else
342                 return 0;
343 }
344
345 /**
346  *  @brief This function closes the ethX interface
347  *
348  *  @param dev     A pointer to net_device structure
349  *  @return        0
350  */
351 static int wlan_close(struct net_device *dev)
352 {
353         wlan_private *priv = (wlan_private *) dev->priv;
354
355         netif_stop_queue(dev);
356         priv->infra_open = 0;
357         if (priv->mesh_open == 0)
358                 return wlan_dev_close(dev);
359         else
360                 return 0;
361 }
362
363
364 static int wlan_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
365 {
366         int ret = 0;
367         wlan_private *priv = dev->priv;
368
369         lbs_deb_enter(LBS_DEB_NET);
370
371         if (priv->dnld_sent || priv->adapter->TxLockFlag) {
372                 priv->stats.tx_dropped++;
373                 goto done;
374         }
375
376         netif_stop_queue(priv->dev);
377         netif_stop_queue(priv->mesh_dev);
378
379         if (libertas_process_tx(priv, skb) == 0)
380                 dev->trans_start = jiffies;
381 done:
382         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
383         return ret;
384 }
385
386 /**
387  * @brief Mark mesh packets and handover them to wlan_hard_start_xmit
388  *
389  */
390 static int mesh_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
391 {
392         wlan_private *priv = dev->priv;
393         int ret;
394
395         lbs_deb_enter(LBS_DEB_MESH);
396
397         SET_MESH_FRAME(skb);
398
399         ret = wlan_hard_start_xmit(skb, priv->dev);
400         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
401         return ret;
402 }
403
404 /**
405  * @brief Mark non-mesh packets and handover them to wlan_hard_start_xmit
406  *
407  */
408 static int wlan_pre_start_xmit(struct sk_buff *skb, struct net_device *dev)
409 {
410         int ret;
411
412         lbs_deb_enter(LBS_DEB_NET);
413
414         UNSET_MESH_FRAME(skb);
415
416         ret = wlan_hard_start_xmit(skb, dev);
417         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
418         return ret;
419 }
420
421 static void wlan_tx_timeout(struct net_device *dev)
422 {
423         wlan_private *priv = (wlan_private *) dev->priv;
424
425         lbs_deb_enter(LBS_DEB_TX);
426
427         lbs_pr_err("tx watch dog timeout\n");
428
429         priv->dnld_sent = DNLD_RES_RECEIVED;
430         dev->trans_start = jiffies;
431
432         if (priv->adapter->currenttxskb) {
433                 if (priv->adapter->radiomode == WLAN_RADIOMODE_RADIOTAP) {
434                         /* If we are here, we have not received feedback from
435                            the previous packet.  Assume TX_FAIL and move on. */
436                         priv->adapter->eventcause = 0x01000000;
437                         libertas_send_tx_feedback(priv);
438                 } else
439                         wake_up_interruptible(&priv->mainthread.waitq);
440         } else if (priv->adapter->connect_status == libertas_connected) {
441                 netif_wake_queue(priv->dev);
442                 netif_wake_queue(priv->mesh_dev);
443         }
444
445         lbs_deb_leave(LBS_DEB_TX);
446 }
447
448 /**
449  *  @brief This function returns the network statistics
450  *
451  *  @param dev     A pointer to wlan_private structure
452  *  @return        A pointer to net_device_stats structure
453  */
454 static struct net_device_stats *wlan_get_stats(struct net_device *dev)
455 {
456         wlan_private *priv = (wlan_private *) dev->priv;
457
458         return &priv->stats;
459 }
460
461 static int wlan_set_mac_address(struct net_device *dev, void *addr)
462 {
463         int ret = 0;
464         wlan_private *priv = (wlan_private *) dev->priv;
465         wlan_adapter *adapter = priv->adapter;
466         struct sockaddr *phwaddr = addr;
467
468         lbs_deb_enter(LBS_DEB_NET);
469
470         /* In case it was called from the mesh device */
471         dev = priv->dev ;
472
473         memset(adapter->current_addr, 0, ETH_ALEN);
474
475         /* dev->dev_addr is 8 bytes */
476         lbs_dbg_hex("dev->dev_addr:", dev->dev_addr, ETH_ALEN);
477
478         lbs_dbg_hex("addr:", phwaddr->sa_data, ETH_ALEN);
479         memcpy(adapter->current_addr, phwaddr->sa_data, ETH_ALEN);
480
481         ret = libertas_prepare_and_send_command(priv, cmd_802_11_mac_address,
482                                     cmd_act_set,
483                                     cmd_option_waitforrsp, 0, NULL);
484
485         if (ret) {
486                 lbs_deb_net("set MAC address failed\n");
487                 ret = -1;
488                 goto done;
489         }
490
491         lbs_dbg_hex("adapter->macaddr:", adapter->current_addr, ETH_ALEN);
492         memcpy(dev->dev_addr, adapter->current_addr, ETH_ALEN);
493         if (priv->mesh_dev)
494                 memcpy(priv->mesh_dev->dev_addr, adapter->current_addr, ETH_ALEN);
495
496 done:
497         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
498         return ret;
499 }
500
501 static int wlan_copy_multicast_address(wlan_adapter * adapter,
502                                      struct net_device *dev)
503 {
504         int i = 0;
505         struct dev_mc_list *mcptr = dev->mc_list;
506
507         for (i = 0; i < dev->mc_count; i++) {
508                 memcpy(&adapter->multicastlist[i], mcptr->dmi_addr, ETH_ALEN);
509                 mcptr = mcptr->next;
510         }
511
512         return i;
513
514 }
515
516 static void wlan_set_multicast_list(struct net_device *dev)
517 {
518         wlan_private *priv = dev->priv;
519         wlan_adapter *adapter = priv->adapter;
520         int oldpacketfilter;
521
522         lbs_deb_enter(LBS_DEB_NET);
523
524         oldpacketfilter = adapter->currentpacketfilter;
525
526         if (dev->flags & IFF_PROMISC) {
527                 lbs_deb_net("enable promiscuous mode\n");
528                 adapter->currentpacketfilter |=
529                     cmd_act_mac_promiscuous_enable;
530                 adapter->currentpacketfilter &=
531                     ~(cmd_act_mac_all_multicast_enable |
532                       cmd_act_mac_multicast_enable);
533         } else {
534                 /* Multicast */
535                 adapter->currentpacketfilter &=
536                     ~cmd_act_mac_promiscuous_enable;
537
538                 if (dev->flags & IFF_ALLMULTI || dev->mc_count >
539                     MRVDRV_MAX_MULTICAST_LIST_SIZE) {
540                         lbs_deb_net( "enabling all multicast\n");
541                         adapter->currentpacketfilter |=
542                             cmd_act_mac_all_multicast_enable;
543                         adapter->currentpacketfilter &=
544                             ~cmd_act_mac_multicast_enable;
545                 } else {
546                         adapter->currentpacketfilter &=
547                             ~cmd_act_mac_all_multicast_enable;
548
549                         if (!dev->mc_count) {
550                                 lbs_deb_net("no multicast addresses, "
551                                        "disabling multicast\n");
552                                 adapter->currentpacketfilter &=
553                                     ~cmd_act_mac_multicast_enable;
554                         } else {
555                                 int i;
556
557                                 adapter->currentpacketfilter |=
558                                     cmd_act_mac_multicast_enable;
559
560                                 adapter->nr_of_multicastmacaddr =
561                                     wlan_copy_multicast_address(adapter, dev);
562
563                                 lbs_deb_net("multicast addresses: %d\n",
564                                        dev->mc_count);
565
566                                 for (i = 0; i < dev->mc_count; i++) {
567                                         lbs_deb_net("Multicast address %d:"
568                                                MAC_FMT "\n", i,
569                                                adapter->multicastlist[i][0],
570                                                adapter->multicastlist[i][1],
571                                                adapter->multicastlist[i][2],
572                                                adapter->multicastlist[i][3],
573                                                adapter->multicastlist[i][4],
574                                                adapter->multicastlist[i][5]);
575                                 }
576                                 /* send multicast addresses to firmware */
577                                 libertas_prepare_and_send_command(priv,
578                                                       cmd_mac_multicast_adr,
579                                                       cmd_act_set, 0, 0,
580                                                       NULL);
581                         }
582                 }
583         }
584
585         if (adapter->currentpacketfilter != oldpacketfilter) {
586                 libertas_set_mac_packet_filter(priv);
587         }
588
589         lbs_deb_leave(LBS_DEB_NET);
590 }
591
592 /**
593  *  @brief This function handles the major jobs in the WLAN driver.
594  *  It handles all events generated by firmware, RX data received
595  *  from firmware and TX data sent from kernel.
596  *
597  *  @param data    A pointer to wlan_thread structure
598  *  @return        0
599  */
600 static int wlan_service_main_thread(void *data)
601 {
602         struct wlan_thread *thread = data;
603         wlan_private *priv = thread->priv;
604         wlan_adapter *adapter = priv->adapter;
605         wait_queue_t wait;
606         u8 ireg = 0;
607
608         lbs_deb_enter(LBS_DEB_THREAD);
609
610         wlan_activate_thread(thread);
611
612         init_waitqueue_entry(&wait, current);
613
614         for (;;) {
615                 lbs_deb_thread( "main-thread 111: intcounter=%d "
616                        "currenttxskb=%p dnld_sent=%d\n",
617                        adapter->intcounter,
618                        adapter->currenttxskb, priv->dnld_sent);
619
620                 add_wait_queue(&thread->waitq, &wait);
621                 set_current_state(TASK_INTERRUPTIBLE);
622                 spin_lock_irq(&adapter->driver_lock);
623                 if ((adapter->psstate == PS_STATE_SLEEP) ||
624                     (!adapter->intcounter
625                      && (priv->dnld_sent || adapter->cur_cmd ||
626                          list_empty(&adapter->cmdpendingq)))) {
627                         lbs_deb_thread(
628                                "main-thread sleeping... Conn=%d IntC=%d PS_mode=%d PS_State=%d\n",
629                                adapter->connect_status, adapter->intcounter,
630                                adapter->psmode, adapter->psstate);
631                         spin_unlock_irq(&adapter->driver_lock);
632                         schedule();
633                 } else
634                         spin_unlock_irq(&adapter->driver_lock);
635
636
637                 lbs_deb_thread(
638                        "main-thread 222 (waking up): intcounter=%d currenttxskb=%p "
639                        "dnld_sent=%d\n", adapter->intcounter,
640                        adapter->currenttxskb, priv->dnld_sent);
641
642                 set_current_state(TASK_RUNNING);
643                 remove_wait_queue(&thread->waitq, &wait);
644                 try_to_freeze();
645
646                 lbs_deb_thread("main-thread 333: intcounter=%d currenttxskb=%p "
647                        "dnld_sent=%d\n",
648                        adapter->intcounter,
649                        adapter->currenttxskb, priv->dnld_sent);
650
651                 if (kthread_should_stop()
652                     || adapter->surpriseremoved) {
653                         lbs_deb_thread(
654                                "main-thread: break from main thread: surpriseremoved=0x%x\n",
655                                adapter->surpriseremoved);
656                         break;
657                 }
658
659
660                 spin_lock_irq(&adapter->driver_lock);
661                 if (adapter->intcounter) {
662                         u8 int_status;
663                         adapter->intcounter = 0;
664                         int_status = priv->hw_get_int_status(priv, &ireg);
665
666                         if (int_status) {
667                                 lbs_deb_thread(
668                                        "main-thread: reading HOST_INT_STATUS_REG failed\n");
669                                 spin_unlock_irq(&adapter->driver_lock);
670                                 continue;
671                         }
672                         adapter->hisregcpy |= ireg;
673                 }
674
675                 lbs_deb_thread("main-thread 444: intcounter=%d currenttxskb=%p "
676                        "dnld_sent=%d\n",
677                        adapter->intcounter,
678                        adapter->currenttxskb, priv->dnld_sent);
679
680                 /* command response? */
681                 if (adapter->hisregcpy & his_cmdupldrdy) {
682                         lbs_deb_thread("main-thread: cmd response ready\n");
683
684                         adapter->hisregcpy &= ~his_cmdupldrdy;
685                         spin_unlock_irq(&adapter->driver_lock);
686                         libertas_process_rx_command(priv);
687                         spin_lock_irq(&adapter->driver_lock);
688                 }
689
690                 /* Any Card Event */
691                 if (adapter->hisregcpy & his_cardevent) {
692                         lbs_deb_thread("main-thread: Card Event Activity\n");
693
694                         adapter->hisregcpy &= ~his_cardevent;
695
696                         if (priv->hw_read_event_cause(priv)) {
697                                 lbs_pr_alert(
698                                        "main-thread: hw_read_event_cause failed\n");
699                                 spin_unlock_irq(&adapter->driver_lock);
700                                 continue;
701                         }
702                         spin_unlock_irq(&adapter->driver_lock);
703                         libertas_process_event(priv);
704                 } else
705                         spin_unlock_irq(&adapter->driver_lock);
706
707                 /* Check if we need to confirm Sleep Request received previously */
708                 if (adapter->psstate == PS_STATE_PRE_SLEEP) {
709                         if (!priv->dnld_sent && !adapter->cur_cmd) {
710                                 if (adapter->connect_status ==
711                                     libertas_connected) {
712                                         lbs_deb_thread(
713                                                "main_thread: PRE_SLEEP--intcounter=%d currenttxskb=%p "
714                                                "dnld_sent=%d cur_cmd=%p, confirm now\n",
715                                                adapter->intcounter,
716                                                adapter->currenttxskb,
717                                                priv->dnld_sent,
718                                                adapter->cur_cmd);
719
720                                         libertas_ps_confirm_sleep(priv,
721                                                        (u16) adapter->psmode);
722                                 } else {
723                                         /* workaround for firmware sending
724                                          * deauth/linkloss event immediately
725                                          * after sleep request, remove this
726                                          * after firmware fixes it
727                                          */
728                                         adapter->psstate = PS_STATE_AWAKE;
729                                         lbs_pr_alert(
730                                                "main-thread: ignore PS_SleepConfirm in non-connected state\n");
731                                 }
732                         }
733                 }
734
735                 /* The PS state is changed during processing of Sleep Request
736                  * event above
737                  */
738                 if ((priv->adapter->psstate == PS_STATE_SLEEP) ||
739                     (priv->adapter->psstate == PS_STATE_PRE_SLEEP))
740                         continue;
741
742                 /* Execute the next command */
743                 if (!priv->dnld_sent && !priv->adapter->cur_cmd)
744                         libertas_execute_next_command(priv);
745
746                 /* Wake-up command waiters which can't sleep in
747                  * libertas_prepare_and_send_command
748                  */
749                 if (!adapter->nr_cmd_pending)
750                         wake_up_all(&adapter->cmd_pending);
751
752                 libertas_tx_runqueue(priv);
753         }
754
755         del_timer(&adapter->command_timer);
756         adapter->nr_cmd_pending = 0;
757         wake_up_all(&adapter->cmd_pending);
758         wlan_deactivate_thread(thread);
759
760         lbs_deb_leave(LBS_DEB_THREAD);
761         return 0;
762 }
763
764 /**
765  * @brief This function adds the card. it will probe the
766  * card, allocate the wlan_priv and initialize the device.
767  *
768  *  @param card    A pointer to card
769  *  @return        A pointer to wlan_private structure
770  */
771 wlan_private *libertas_add_card(void *card, struct device *dmdev)
772 {
773         struct net_device *dev = NULL;
774         wlan_private *priv = NULL;
775
776         lbs_deb_enter(LBS_DEB_NET);
777
778         /* Allocate an Ethernet device and register it */
779         if (!(dev = alloc_etherdev(sizeof(wlan_private)))) {
780                 lbs_pr_err("init ethX device failed\n");
781                 return NULL;
782         }
783         priv = dev->priv;
784
785         /* allocate buffer for wlan_adapter */
786         if (!(priv->adapter = kzalloc(sizeof(wlan_adapter), GFP_KERNEL))) {
787                 lbs_pr_err("allocate buffer for wlan_adapter failed\n");
788                 goto err_kzalloc;
789         }
790
791         priv->dev = dev;
792         priv->card = card;
793         priv->mesh_open = 0;
794         priv->infra_open = 0;
795
796         SET_MODULE_OWNER(dev);
797
798         /* Setup the OS Interface to our functions */
799         dev->open = wlan_open;
800         dev->hard_start_xmit = wlan_pre_start_xmit;
801         dev->stop = wlan_close;
802         dev->do_ioctl = libertas_do_ioctl;
803         dev->set_mac_address = wlan_set_mac_address;
804         dev->tx_timeout = wlan_tx_timeout;
805         dev->get_stats = wlan_get_stats;
806         dev->watchdog_timeo = 5 * HZ;
807         dev->ethtool_ops = &libertas_ethtool_ops;
808 #ifdef  WIRELESS_EXT
809         dev->wireless_handlers = (struct iw_handler_def *)&libertas_handler_def;
810 #endif
811 #define NETIF_F_DYNALLOC 16
812         dev->features |= NETIF_F_DYNALLOC;
813         dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
814         dev->set_multicast_list = wlan_set_multicast_list;
815
816         SET_NETDEV_DEV(dev, dmdev);
817
818         INIT_LIST_HEAD(&priv->adapter->cmdfreeq);
819         INIT_LIST_HEAD(&priv->adapter->cmdpendingq);
820
821         spin_lock_init(&priv->adapter->driver_lock);
822         init_waitqueue_head(&priv->adapter->cmd_pending);
823         priv->adapter->nr_cmd_pending = 0;
824         goto done;
825
826 err_kzalloc:
827         free_netdev(dev);
828         priv = NULL;
829 done:
830         lbs_deb_leave_args(LBS_DEB_NET, "priv %p", priv);
831         return priv;
832 }
833 EXPORT_SYMBOL_GPL(libertas_add_card);
834
835 int libertas_activate_card(wlan_private *priv, char *fw_name)
836 {
837         struct net_device *dev = priv->dev;
838         int ret = -1;
839
840         lbs_deb_enter(LBS_DEB_MAIN);
841
842         lbs_deb_thread("Starting kthread...\n");
843         priv->mainthread.priv = priv;
844         wlan_create_thread(wlan_service_main_thread,
845                            &priv->mainthread, "wlan_main_service");
846
847         priv->assoc_thread =
848                 create_singlethread_workqueue("libertas_assoc");
849         INIT_DELAYED_WORK(&priv->assoc_work, libertas_association_worker);
850         INIT_WORK(&priv->sync_channel, libertas_sync_channel);
851
852         /*
853          * Register the device. Fillup the private data structure with
854          * relevant information from the card and request for the required
855          * IRQ.
856          */
857         if (priv->hw_register_dev(priv) < 0) {
858                 lbs_pr_err("failed to register WLAN device\n");
859                 goto err_registerdev;
860         }
861
862         /* init FW and HW */
863         if (fw_name && libertas_init_fw(priv, fw_name)) {
864                 lbs_pr_err("firmware init failed\n");
865                 goto err_registerdev;
866         }
867
868         if (register_netdev(dev)) {
869                 lbs_pr_err("cannot register ethX device\n");
870                 goto err_init_fw;
871         }
872
873         lbs_pr_info("%s: Marvell WLAN 802.11 adapter\n", dev->name);
874
875         libertas_debugfs_init_one(priv, dev);
876
877         ret = 0;
878         goto done;
879
880 err_init_fw:
881         priv->hw_unregister_dev(priv);
882 err_registerdev:
883         destroy_workqueue(priv->assoc_thread);
884         /* Stop the thread servicing the interrupts */
885         wake_up_interruptible(&priv->mainthread.waitq);
886         wlan_terminate_thread(&priv->mainthread);
887 done:
888         lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
889         return ret;
890 }
891 EXPORT_SYMBOL_GPL(libertas_activate_card);
892
893
894 /**
895  * @brief This function adds mshX interface
896  *
897  *  @param priv    A pointer to the wlan_private structure
898  *  @return        0 if successful, -X otherwise
899  */
900 int libertas_add_mesh(wlan_private *priv, struct device *dev)
901 {
902         struct net_device *mesh_dev = NULL;
903         int ret = 0;
904
905         lbs_deb_enter(LBS_DEB_MESH);
906
907         /* Allocate a virtual mesh device */
908         if (!(mesh_dev = alloc_netdev(0, "msh%d", ether_setup))) {
909                 lbs_deb_mesh("init mshX device failed\n");
910                 ret = -ENOMEM;
911                 goto done;
912         }
913         mesh_dev->priv = priv;
914         priv->mesh_dev = mesh_dev;
915
916         SET_MODULE_OWNER(mesh_dev);
917
918         mesh_dev->open = mesh_open;
919         mesh_dev->hard_start_xmit = mesh_pre_start_xmit;
920         mesh_dev->stop = mesh_close;
921         mesh_dev->do_ioctl = libertas_do_ioctl;
922         mesh_dev->get_stats = wlan_get_stats;
923         mesh_dev->set_mac_address = wlan_set_mac_address;
924         mesh_dev->ethtool_ops = &libertas_ethtool_ops;
925         memcpy(mesh_dev->dev_addr, priv->dev->dev_addr,
926                         sizeof(priv->dev->dev_addr));
927
928         SET_NETDEV_DEV(priv->mesh_dev, dev);
929
930 #ifdef  WIRELESS_EXT
931         mesh_dev->wireless_handlers = (struct iw_handler_def *)&mesh_handler_def;
932 #endif
933 #define NETIF_F_DYNALLOC 16
934
935         /* Register virtual mesh interface */
936         ret = register_netdev(mesh_dev);
937         if (ret) {
938                 lbs_pr_err("cannot register mshX virtual interface\n");
939                 goto err_free;
940         }
941
942         ret = device_create_file(&(mesh_dev->dev), &dev_attr_anycast_mask);
943         if (ret)
944                 goto err_unregister;
945
946         /* Everything successful */
947         ret = 0;
948         goto done;
949
950
951 err_unregister:
952         unregister_netdev(mesh_dev);
953
954 err_free:
955         free_netdev(mesh_dev);
956
957 done:
958         lbs_deb_leave_args(LBS_DEB_MESH, "ret %d", ret);
959         return ret;
960 }
961 EXPORT_SYMBOL_GPL(libertas_add_mesh);
962
963 static void wake_pending_cmdnodes(wlan_private *priv)
964 {
965         struct cmd_ctrl_node *cmdnode;
966         unsigned long flags;
967
968         lbs_deb_enter(LBS_DEB_CMD);
969
970         spin_lock_irqsave(&priv->adapter->driver_lock, flags);
971         list_for_each_entry(cmdnode, &priv->adapter->cmdpendingq, list) {
972                 cmdnode->cmdwaitqwoken = 1;
973                 wake_up_interruptible(&cmdnode->cmdwait_q);
974         }
975         spin_unlock_irqrestore(&priv->adapter->driver_lock, flags);
976 }
977
978
979 int libertas_remove_card(wlan_private *priv)
980 {
981         wlan_adapter *adapter;
982         struct net_device *dev;
983         union iwreq_data wrqu;
984
985         lbs_deb_enter(LBS_DEB_NET);
986
987         if (!priv)
988                 goto out;
989
990         adapter = priv->adapter;
991
992         if (!adapter)
993                 goto out;
994
995         dev = priv->dev;
996
997         netif_stop_queue(priv->dev);
998         netif_carrier_off(priv->dev);
999
1000         wake_pending_cmdnodes(priv);
1001
1002         unregister_netdev(dev);
1003
1004         cancel_delayed_work(&priv->assoc_work);
1005         destroy_workqueue(priv->assoc_thread);
1006
1007         if (adapter->psmode == wlan802_11powermodemax_psp) {
1008                 adapter->psmode = wlan802_11powermodecam;
1009                 libertas_ps_wakeup(priv, cmd_option_waitforrsp);
1010         }
1011
1012         memset(wrqu.ap_addr.sa_data, 0xaa, ETH_ALEN);
1013         wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1014         wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
1015
1016         adapter->surpriseremoved = 1;
1017
1018         /* Stop the thread servicing the interrupts */
1019         wlan_terminate_thread(&priv->mainthread);
1020
1021         libertas_debugfs_remove_one(priv);
1022
1023         lbs_deb_net("free adapter\n");
1024         libertas_free_adapter(priv);
1025
1026         lbs_deb_net("unregister finish\n");
1027
1028         priv->dev = NULL;
1029         free_netdev(dev);
1030
1031 out:
1032         lbs_deb_leave(LBS_DEB_NET);
1033         return 0;
1034 }
1035 EXPORT_SYMBOL_GPL(libertas_remove_card);
1036
1037
1038 void libertas_remove_mesh(wlan_private *priv)
1039 {
1040         struct net_device *mesh_dev;
1041
1042         lbs_deb_enter(LBS_DEB_NET);
1043
1044         if (!priv)
1045                 goto out;
1046
1047         mesh_dev = priv->mesh_dev;
1048
1049         netif_stop_queue(mesh_dev);
1050         netif_carrier_off(priv->mesh_dev);
1051
1052         device_remove_file(&(mesh_dev->dev), &dev_attr_anycast_mask);
1053         unregister_netdev(mesh_dev);
1054
1055         priv->mesh_dev = NULL ;
1056         free_netdev(mesh_dev);
1057
1058 out:
1059         lbs_deb_leave(LBS_DEB_NET);
1060 }
1061 EXPORT_SYMBOL_GPL(libertas_remove_mesh);
1062
1063 /**
1064  *  @brief This function finds the CFP in
1065  *  region_cfp_table based on region and band parameter.
1066  *
1067  *  @param region  The region code
1068  *  @param band    The band
1069  *  @param cfp_no  A pointer to CFP number
1070  *  @return        A pointer to CFP
1071  */
1072 struct chan_freq_power *libertas_get_region_cfp_table(u8 region, u8 band, int *cfp_no)
1073 {
1074         int i, end;
1075
1076         lbs_deb_enter(LBS_DEB_MAIN);
1077
1078         end = sizeof(region_cfp_table)/sizeof(struct region_cfp_table);
1079
1080         for (i = 0; i < end ; i++) {
1081                 lbs_deb_main("region_cfp_table[i].region=%d\n",
1082                         region_cfp_table[i].region);
1083                 if (region_cfp_table[i].region == region) {
1084                         *cfp_no = region_cfp_table[i].cfp_no_BG;
1085                         lbs_deb_leave(LBS_DEB_MAIN);
1086                         return region_cfp_table[i].cfp_BG;
1087                 }
1088         }
1089
1090         lbs_deb_leave_args(LBS_DEB_MAIN, "ret NULL");
1091         return NULL;
1092 }
1093
1094 int libertas_set_regiontable(wlan_private * priv, u8 region, u8 band)
1095 {
1096         wlan_adapter *adapter = priv->adapter;
1097         int ret = 0;
1098         int i = 0;
1099
1100         struct chan_freq_power *cfp;
1101         int cfp_no;
1102
1103         lbs_deb_enter(LBS_DEB_MAIN);
1104
1105         memset(adapter->region_channel, 0, sizeof(adapter->region_channel));
1106
1107         {
1108                 cfp = libertas_get_region_cfp_table(region, band, &cfp_no);
1109                 if (cfp != NULL) {
1110                         adapter->region_channel[i].nrcfp = cfp_no;
1111                         adapter->region_channel[i].CFP = cfp;
1112                 } else {
1113                         lbs_deb_main("wrong region code %#x in band B/G\n",
1114                                region);
1115                         ret = -1;
1116                         goto out;
1117                 }
1118                 adapter->region_channel[i].valid = 1;
1119                 adapter->region_channel[i].region = region;
1120                 adapter->region_channel[i].band = band;
1121                 i++;
1122         }
1123 out:
1124         lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1125         return ret;
1126 }
1127
1128 /**
1129  *  @brief This function handles the interrupt. it will change PS
1130  *  state if applicable. it will wake up main_thread to handle
1131  *  the interrupt event as well.
1132  *
1133  *  @param dev     A pointer to net_device structure
1134  *  @return        n/a
1135  */
1136 void libertas_interrupt(struct net_device *dev)
1137 {
1138         wlan_private *priv = dev->priv;
1139
1140         lbs_deb_enter(LBS_DEB_THREAD);
1141
1142         lbs_deb_thread("libertas_interrupt: intcounter=%d\n",
1143                priv->adapter->intcounter);
1144
1145         priv->adapter->intcounter++;
1146
1147         if (priv->adapter->psstate == PS_STATE_SLEEP) {
1148                 priv->adapter->psstate = PS_STATE_AWAKE;
1149                 netif_wake_queue(dev);
1150                 netif_wake_queue(priv->mesh_dev);
1151         }
1152
1153         wake_up_interruptible(&priv->mainthread.waitq);
1154
1155         lbs_deb_leave(LBS_DEB_THREAD);
1156 }
1157 EXPORT_SYMBOL_GPL(libertas_interrupt);
1158
1159 static int libertas_init_module(void)
1160 {
1161         lbs_deb_enter(LBS_DEB_MAIN);
1162         libertas_debugfs_init();
1163         lbs_deb_leave(LBS_DEB_MAIN);
1164         return 0;
1165 }
1166
1167 static void libertas_exit_module(void)
1168 {
1169         lbs_deb_enter(LBS_DEB_MAIN);
1170
1171         libertas_debugfs_remove();
1172
1173         lbs_deb_leave(LBS_DEB_MAIN);
1174 }
1175
1176 module_init(libertas_init_module);
1177 module_exit(libertas_exit_module);
1178
1179 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1180 MODULE_AUTHOR("Marvell International Ltd.");
1181 MODULE_LICENSE("GPL");