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Merge branch 'for-linus' into for-next
[deliverable/linux.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 ret = lbs_set_11d_domain_info(priv);
156 if (ret) {
157 lbs_deb_net("set 11d domain info failed\n");
158 goto err;
159 }
160
161 lbs_update_channel(priv);
162
163 priv->iface_running = true;
164 return 0;
165
166 err:
167 if (priv->power_save)
168 priv->power_save(priv);
169 return ret;
170 }
171
172 /**
173 * lbs_dev_open - open the ethX interface
174 *
175 * @dev: A pointer to &net_device structure
176 * returns: 0 or -EBUSY if monitor mode active
177 */
178 static int lbs_dev_open(struct net_device *dev)
179 {
180 struct lbs_private *priv = dev->ml_priv;
181 int ret = 0;
182
183 lbs_deb_enter(LBS_DEB_NET);
184 if (!priv->iface_running) {
185 ret = lbs_start_iface(priv);
186 if (ret)
187 goto out;
188 }
189
190 spin_lock_irq(&priv->driver_lock);
191
192 netif_carrier_off(dev);
193
194 if (!priv->tx_pending_len)
195 netif_wake_queue(dev);
196
197 spin_unlock_irq(&priv->driver_lock);
198
199 out:
200 lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
201 return ret;
202 }
203
204 static bool lbs_command_queue_empty(struct lbs_private *priv)
205 {
206 unsigned long flags;
207 bool ret;
208 spin_lock_irqsave(&priv->driver_lock, flags);
209 ret = priv->cur_cmd == NULL && list_empty(&priv->cmdpendingq);
210 spin_unlock_irqrestore(&priv->driver_lock, flags);
211 return ret;
212 }
213
214 int lbs_stop_iface(struct lbs_private *priv)
215 {
216 unsigned long flags;
217 int ret = 0;
218
219 lbs_deb_enter(LBS_DEB_MAIN);
220
221 spin_lock_irqsave(&priv->driver_lock, flags);
222 priv->iface_running = false;
223 kfree_skb(priv->currenttxskb);
224 priv->currenttxskb = NULL;
225 priv->tx_pending_len = 0;
226 spin_unlock_irqrestore(&priv->driver_lock, flags);
227
228 cancel_work_sync(&priv->mcast_work);
229 del_timer_sync(&priv->tx_lockup_timer);
230
231 /* Disable command processing, and wait for all commands to complete */
232 lbs_deb_main("waiting for commands to complete\n");
233 wait_event(priv->waitq, lbs_command_queue_empty(priv));
234 lbs_deb_main("all commands completed\n");
235
236 if (priv->power_save)
237 ret = priv->power_save(priv);
238
239 lbs_deb_leave(LBS_DEB_MAIN);
240 return ret;
241 }
242
243 /**
244 * lbs_eth_stop - close the ethX interface
245 *
246 * @dev: A pointer to &net_device structure
247 * returns: 0
248 */
249 static int lbs_eth_stop(struct net_device *dev)
250 {
251 struct lbs_private *priv = dev->ml_priv;
252
253 lbs_deb_enter(LBS_DEB_NET);
254
255 if (priv->connect_status == LBS_CONNECTED)
256 lbs_disconnect(priv, WLAN_REASON_DEAUTH_LEAVING);
257
258 spin_lock_irq(&priv->driver_lock);
259 netif_stop_queue(dev);
260 spin_unlock_irq(&priv->driver_lock);
261
262 lbs_update_mcast(priv);
263 cancel_delayed_work_sync(&priv->scan_work);
264 if (priv->scan_req)
265 lbs_scan_done(priv);
266
267 netif_carrier_off(priv->dev);
268
269 if (!lbs_iface_active(priv))
270 lbs_stop_iface(priv);
271
272 lbs_deb_leave(LBS_DEB_NET);
273 return 0;
274 }
275
276 void lbs_host_to_card_done(struct lbs_private *priv)
277 {
278 unsigned long flags;
279
280 lbs_deb_enter(LBS_DEB_THREAD);
281
282 spin_lock_irqsave(&priv->driver_lock, flags);
283 del_timer(&priv->tx_lockup_timer);
284
285 priv->dnld_sent = DNLD_RES_RECEIVED;
286
287 /* Wake main thread if commands are pending */
288 if (!priv->cur_cmd || priv->tx_pending_len > 0) {
289 if (!priv->wakeup_dev_required)
290 wake_up(&priv->waitq);
291 }
292
293 spin_unlock_irqrestore(&priv->driver_lock, flags);
294 lbs_deb_leave(LBS_DEB_THREAD);
295 }
296 EXPORT_SYMBOL_GPL(lbs_host_to_card_done);
297
298 int lbs_set_mac_address(struct net_device *dev, void *addr)
299 {
300 int ret = 0;
301 struct lbs_private *priv = dev->ml_priv;
302 struct sockaddr *phwaddr = addr;
303
304 lbs_deb_enter(LBS_DEB_NET);
305
306 /*
307 * Can only set MAC address when all interfaces are down, to be written
308 * to the hardware when one of them is brought up.
309 */
310 if (lbs_iface_active(priv))
311 return -EBUSY;
312
313 /* In case it was called from the mesh device */
314 dev = priv->dev;
315
316 memcpy(priv->current_addr, phwaddr->sa_data, ETH_ALEN);
317 memcpy(dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
318 if (priv->mesh_dev)
319 memcpy(priv->mesh_dev->dev_addr, phwaddr->sa_data, ETH_ALEN);
320
321 lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
322 return ret;
323 }
324
325
326 static inline int mac_in_list(unsigned char *list, int list_len,
327 unsigned char *mac)
328 {
329 while (list_len) {
330 if (!memcmp(list, mac, ETH_ALEN))
331 return 1;
332 list += ETH_ALEN;
333 list_len--;
334 }
335 return 0;
336 }
337
338
339 static int lbs_add_mcast_addrs(struct cmd_ds_mac_multicast_adr *cmd,
340 struct net_device *dev, int nr_addrs)
341 {
342 int i = nr_addrs;
343 struct netdev_hw_addr *ha;
344 int cnt;
345
346 if ((dev->flags & (IFF_UP|IFF_MULTICAST)) != (IFF_UP|IFF_MULTICAST))
347 return nr_addrs;
348
349 netif_addr_lock_bh(dev);
350 cnt = netdev_mc_count(dev);
351 netdev_for_each_mc_addr(ha, dev) {
352 if (mac_in_list(cmd->maclist, nr_addrs, ha->addr)) {
353 lbs_deb_net("mcast address %s:%pM skipped\n", dev->name,
354 ha->addr);
355 cnt--;
356 continue;
357 }
358
359 if (i == MRVDRV_MAX_MULTICAST_LIST_SIZE)
360 break;
361 memcpy(&cmd->maclist[6*i], ha->addr, ETH_ALEN);
362 lbs_deb_net("mcast address %s:%pM added to filter\n", dev->name,
363 ha->addr);
364 i++;
365 cnt--;
366 }
367 netif_addr_unlock_bh(dev);
368 if (cnt)
369 return -EOVERFLOW;
370
371 return i;
372 }
373
374 void lbs_update_mcast(struct lbs_private *priv)
375 {
376 struct cmd_ds_mac_multicast_adr mcast_cmd;
377 int dev_flags = 0;
378 int nr_addrs;
379 int old_mac_control = priv->mac_control;
380
381 lbs_deb_enter(LBS_DEB_NET);
382
383 if (netif_running(priv->dev))
384 dev_flags |= priv->dev->flags;
385 if (priv->mesh_dev && netif_running(priv->mesh_dev))
386 dev_flags |= priv->mesh_dev->flags;
387
388 if (dev_flags & IFF_PROMISC) {
389 priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
390 priv->mac_control &= ~(CMD_ACT_MAC_ALL_MULTICAST_ENABLE |
391 CMD_ACT_MAC_MULTICAST_ENABLE);
392 goto out_set_mac_control;
393 } else if (dev_flags & IFF_ALLMULTI) {
394 do_allmulti:
395 priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
396 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
397 CMD_ACT_MAC_MULTICAST_ENABLE);
398 goto out_set_mac_control;
399 }
400
401 /* Once for priv->dev, again for priv->mesh_dev if it exists */
402 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->dev, 0);
403 if (nr_addrs >= 0 && priv->mesh_dev)
404 nr_addrs = lbs_add_mcast_addrs(&mcast_cmd, priv->mesh_dev, nr_addrs);
405 if (nr_addrs < 0)
406 goto do_allmulti;
407
408 if (nr_addrs) {
409 int size = offsetof(struct cmd_ds_mac_multicast_adr,
410 maclist[6*nr_addrs]);
411
412 mcast_cmd.action = cpu_to_le16(CMD_ACT_SET);
413 mcast_cmd.hdr.size = cpu_to_le16(size);
414 mcast_cmd.nr_of_adrs = cpu_to_le16(nr_addrs);
415
416 lbs_cmd_async(priv, CMD_MAC_MULTICAST_ADR, &mcast_cmd.hdr, size);
417
418 priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
419 } else
420 priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
421
422 priv->mac_control &= ~(CMD_ACT_MAC_PROMISCUOUS_ENABLE |
423 CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
424 out_set_mac_control:
425 if (priv->mac_control != old_mac_control)
426 lbs_set_mac_control(priv);
427
428 lbs_deb_leave(LBS_DEB_NET);
429 }
430
431 static void lbs_set_mcast_worker(struct work_struct *work)
432 {
433 struct lbs_private *priv = container_of(work, struct lbs_private, mcast_work);
434 lbs_update_mcast(priv);
435 }
436
437 void lbs_set_multicast_list(struct net_device *dev)
438 {
439 struct lbs_private *priv = dev->ml_priv;
440
441 schedule_work(&priv->mcast_work);
442 }
443
444 /**
445 * lbs_thread - handles the major jobs in the LBS driver.
446 * It handles all events generated by firmware, RX data received
447 * from firmware and TX data sent from kernel.
448 *
449 * @data: A pointer to &lbs_thread structure
450 * returns: 0
451 */
452 static int lbs_thread(void *data)
453 {
454 struct net_device *dev = data;
455 struct lbs_private *priv = dev->ml_priv;
456 wait_queue_t wait;
457
458 lbs_deb_enter(LBS_DEB_THREAD);
459
460 init_waitqueue_entry(&wait, current);
461
462 for (;;) {
463 int shouldsleep;
464 u8 resp_idx;
465
466 lbs_deb_thread("1: currenttxskb %p, dnld_sent %d\n",
467 priv->currenttxskb, priv->dnld_sent);
468
469 add_wait_queue(&priv->waitq, &wait);
470 set_current_state(TASK_INTERRUPTIBLE);
471 spin_lock_irq(&priv->driver_lock);
472
473 if (kthread_should_stop())
474 shouldsleep = 0; /* Bye */
475 else if (priv->surpriseremoved)
476 shouldsleep = 1; /* We need to wait until we're _told_ to die */
477 else if (priv->psstate == PS_STATE_SLEEP)
478 shouldsleep = 1; /* Sleep mode. Nothing we can do till it wakes */
479 else if (priv->cmd_timed_out)
480 shouldsleep = 0; /* Command timed out. Recover */
481 else if (!priv->fw_ready)
482 shouldsleep = 1; /* Firmware not ready. We're waiting for it */
483 else if (priv->dnld_sent)
484 shouldsleep = 1; /* Something is en route to the device already */
485 else if (priv->tx_pending_len > 0)
486 shouldsleep = 0; /* We've a packet to send */
487 else if (priv->resp_len[priv->resp_idx])
488 shouldsleep = 0; /* We have a command response */
489 else if (priv->cur_cmd)
490 shouldsleep = 1; /* Can't send a command; one already running */
491 else if (!list_empty(&priv->cmdpendingq) &&
492 !(priv->wakeup_dev_required))
493 shouldsleep = 0; /* We have a command to send */
494 else if (kfifo_len(&priv->event_fifo))
495 shouldsleep = 0; /* We have an event to process */
496 else
497 shouldsleep = 1; /* No command */
498
499 if (shouldsleep) {
500 lbs_deb_thread("sleeping, connect_status %d, "
501 "psmode %d, psstate %d\n",
502 priv->connect_status,
503 priv->psmode, priv->psstate);
504 spin_unlock_irq(&priv->driver_lock);
505 schedule();
506 } else
507 spin_unlock_irq(&priv->driver_lock);
508
509 lbs_deb_thread("2: currenttxskb %p, dnld_send %d\n",
510 priv->currenttxskb, priv->dnld_sent);
511
512 set_current_state(TASK_RUNNING);
513 remove_wait_queue(&priv->waitq, &wait);
514
515 lbs_deb_thread("3: currenttxskb %p, dnld_sent %d\n",
516 priv->currenttxskb, priv->dnld_sent);
517
518 if (kthread_should_stop()) {
519 lbs_deb_thread("break from main thread\n");
520 break;
521 }
522
523 if (priv->surpriseremoved) {
524 lbs_deb_thread("adapter removed; waiting to die...\n");
525 continue;
526 }
527
528 lbs_deb_thread("4: currenttxskb %p, dnld_sent %d\n",
529 priv->currenttxskb, priv->dnld_sent);
530
531 /* Process any pending command response */
532 spin_lock_irq(&priv->driver_lock);
533 resp_idx = priv->resp_idx;
534 if (priv->resp_len[resp_idx]) {
535 spin_unlock_irq(&priv->driver_lock);
536 lbs_process_command_response(priv,
537 priv->resp_buf[resp_idx],
538 priv->resp_len[resp_idx]);
539 spin_lock_irq(&priv->driver_lock);
540 priv->resp_len[resp_idx] = 0;
541 }
542 spin_unlock_irq(&priv->driver_lock);
543
544 /* Process hardware events, e.g. card removed, link lost */
545 spin_lock_irq(&priv->driver_lock);
546 while (kfifo_len(&priv->event_fifo)) {
547 u32 event;
548
549 if (kfifo_out(&priv->event_fifo,
550 (unsigned char *) &event, sizeof(event)) !=
551 sizeof(event))
552 break;
553 spin_unlock_irq(&priv->driver_lock);
554 lbs_process_event(priv, event);
555 spin_lock_irq(&priv->driver_lock);
556 }
557 spin_unlock_irq(&priv->driver_lock);
558
559 if (priv->wakeup_dev_required) {
560 lbs_deb_thread("Waking up device...\n");
561 /* Wake up device */
562 if (priv->exit_deep_sleep(priv))
563 lbs_deb_thread("Wakeup device failed\n");
564 continue;
565 }
566
567 /* command timeout stuff */
568 if (priv->cmd_timed_out && priv->cur_cmd) {
569 struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
570
571 netdev_info(dev, "Timeout submitting command 0x%04x\n",
572 le16_to_cpu(cmdnode->cmdbuf->command));
573 lbs_complete_command(priv, cmdnode, -ETIMEDOUT);
574
575 /* Reset card, but only when it isn't in the process
576 * of being shutdown anyway. */
577 if (!dev->dismantle && priv->reset_card)
578 priv->reset_card(priv);
579 }
580 priv->cmd_timed_out = 0;
581
582 if (!priv->fw_ready)
583 continue;
584
585 /* Check if we need to confirm Sleep Request received previously */
586 if (priv->psstate == PS_STATE_PRE_SLEEP &&
587 !priv->dnld_sent && !priv->cur_cmd) {
588 if (priv->connect_status == LBS_CONNECTED) {
589 lbs_deb_thread("pre-sleep, currenttxskb %p, "
590 "dnld_sent %d, cur_cmd %p\n",
591 priv->currenttxskb, priv->dnld_sent,
592 priv->cur_cmd);
593
594 lbs_ps_confirm_sleep(priv);
595 } else {
596 /* workaround for firmware sending
597 * deauth/linkloss event immediately
598 * after sleep request; remove this
599 * after firmware fixes it
600 */
601 priv->psstate = PS_STATE_AWAKE;
602 netdev_alert(dev,
603 "ignore PS_SleepConfirm in non-connected state\n");
604 }
605 }
606
607 /* The PS state is changed during processing of Sleep Request
608 * event above
609 */
610 if ((priv->psstate == PS_STATE_SLEEP) ||
611 (priv->psstate == PS_STATE_PRE_SLEEP))
612 continue;
613
614 if (priv->is_deep_sleep)
615 continue;
616
617 /* Execute the next command */
618 if (!priv->dnld_sent && !priv->cur_cmd)
619 lbs_execute_next_command(priv);
620
621 spin_lock_irq(&priv->driver_lock);
622 if (!priv->dnld_sent && priv->tx_pending_len > 0) {
623 int ret = priv->hw_host_to_card(priv, MVMS_DAT,
624 priv->tx_pending_buf,
625 priv->tx_pending_len);
626 if (ret) {
627 lbs_deb_tx("host_to_card failed %d\n", ret);
628 priv->dnld_sent = DNLD_RES_RECEIVED;
629 } else {
630 mod_timer(&priv->tx_lockup_timer,
631 jiffies + (HZ * 5));
632 }
633 priv->tx_pending_len = 0;
634 if (!priv->currenttxskb) {
635 /* We can wake the queues immediately if we aren't
636 waiting for TX feedback */
637 if (priv->connect_status == LBS_CONNECTED)
638 netif_wake_queue(priv->dev);
639 if (priv->mesh_dev &&
640 netif_running(priv->mesh_dev))
641 netif_wake_queue(priv->mesh_dev);
642 }
643 }
644 spin_unlock_irq(&priv->driver_lock);
645 }
646
647 del_timer(&priv->command_timer);
648 del_timer(&priv->tx_lockup_timer);
649 del_timer(&priv->auto_deepsleep_timer);
650
651 lbs_deb_leave(LBS_DEB_THREAD);
652 return 0;
653 }
654
655 /**
656 * lbs_setup_firmware - gets the HW spec from the firmware and sets
657 * some basic parameters
658 *
659 * @priv: A pointer to &struct lbs_private structure
660 * returns: 0 or -1
661 */
662 static int lbs_setup_firmware(struct lbs_private *priv)
663 {
664 int ret = -1;
665 s16 curlevel = 0, minlevel = 0, maxlevel = 0;
666
667 lbs_deb_enter(LBS_DEB_FW);
668
669 /* Read MAC address from firmware */
670 memset(priv->current_addr, 0xff, ETH_ALEN);
671 ret = lbs_update_hw_spec(priv);
672 if (ret)
673 goto done;
674
675 /* Read power levels if available */
676 ret = lbs_get_tx_power(priv, &curlevel, &minlevel, &maxlevel);
677 if (ret == 0) {
678 priv->txpower_cur = curlevel;
679 priv->txpower_min = minlevel;
680 priv->txpower_max = maxlevel;
681 }
682
683 /* Send cmd to FW to enable 11D function */
684 ret = lbs_set_snmp_mib(priv, SNMP_MIB_OID_11D_ENABLE, 1);
685
686 lbs_set_mac_control(priv);
687 done:
688 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
689 return ret;
690 }
691
692 int lbs_suspend(struct lbs_private *priv)
693 {
694 int ret;
695
696 lbs_deb_enter(LBS_DEB_FW);
697
698 if (priv->is_deep_sleep) {
699 ret = lbs_set_deep_sleep(priv, 0);
700 if (ret) {
701 netdev_err(priv->dev,
702 "deep sleep cancellation failed: %d\n", ret);
703 return ret;
704 }
705 priv->deep_sleep_required = 1;
706 }
707
708 ret = lbs_set_host_sleep(priv, 1);
709
710 netif_device_detach(priv->dev);
711 if (priv->mesh_dev)
712 netif_device_detach(priv->mesh_dev);
713
714 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
715 return ret;
716 }
717 EXPORT_SYMBOL_GPL(lbs_suspend);
718
719 int lbs_resume(struct lbs_private *priv)
720 {
721 int ret;
722
723 lbs_deb_enter(LBS_DEB_FW);
724
725 ret = lbs_set_host_sleep(priv, 0);
726
727 netif_device_attach(priv->dev);
728 if (priv->mesh_dev)
729 netif_device_attach(priv->mesh_dev);
730
731 if (priv->deep_sleep_required) {
732 priv->deep_sleep_required = 0;
733 ret = lbs_set_deep_sleep(priv, 1);
734 if (ret)
735 netdev_err(priv->dev,
736 "deep sleep activation failed: %d\n", ret);
737 }
738
739 if (priv->setup_fw_on_resume)
740 ret = lbs_setup_firmware(priv);
741
742 lbs_deb_leave_args(LBS_DEB_FW, "ret %d", ret);
743 return ret;
744 }
745 EXPORT_SYMBOL_GPL(lbs_resume);
746
747 /**
748 * lbs_cmd_timeout_handler - handles the timeout of command sending.
749 * It will re-send the same command again.
750 *
751 * @data: &struct lbs_private pointer
752 */
753 static void lbs_cmd_timeout_handler(unsigned long data)
754 {
755 struct lbs_private *priv = (struct lbs_private *)data;
756 unsigned long flags;
757
758 lbs_deb_enter(LBS_DEB_CMD);
759 spin_lock_irqsave(&priv->driver_lock, flags);
760
761 if (!priv->cur_cmd)
762 goto out;
763
764 netdev_info(priv->dev, "command 0x%04x timed out\n",
765 le16_to_cpu(priv->cur_cmd->cmdbuf->command));
766
767 priv->cmd_timed_out = 1;
768
769 /*
770 * If the device didn't even acknowledge the command, reset the state
771 * so that we don't block all future commands due to this one timeout.
772 */
773 if (priv->dnld_sent == DNLD_CMD_SENT)
774 priv->dnld_sent = DNLD_RES_RECEIVED;
775
776 wake_up(&priv->waitq);
777 out:
778 spin_unlock_irqrestore(&priv->driver_lock, flags);
779 lbs_deb_leave(LBS_DEB_CMD);
780 }
781
782 /**
783 * lbs_tx_lockup_handler - handles the timeout of the passing of TX frames
784 * to the hardware. This is known to frequently happen with SD8686 when
785 * waking up after a Wake-on-WLAN-triggered resume.
786 *
787 * @data: &struct lbs_private pointer
788 */
789 static void lbs_tx_lockup_handler(unsigned long data)
790 {
791 struct lbs_private *priv = (struct lbs_private *)data;
792 unsigned long flags;
793
794 lbs_deb_enter(LBS_DEB_TX);
795 spin_lock_irqsave(&priv->driver_lock, flags);
796
797 netdev_info(priv->dev, "TX lockup detected\n");
798 if (priv->reset_card)
799 priv->reset_card(priv);
800
801 priv->dnld_sent = DNLD_RES_RECEIVED;
802 wake_up_interruptible(&priv->waitq);
803
804 spin_unlock_irqrestore(&priv->driver_lock, flags);
805 lbs_deb_leave(LBS_DEB_TX);
806 }
807
808 /**
809 * auto_deepsleep_timer_fn - put the device back to deep sleep mode when
810 * timer expires and no activity (command, event, data etc.) is detected.
811 * @data: &struct lbs_private pointer
812 * returns: N/A
813 */
814 static void auto_deepsleep_timer_fn(unsigned long data)
815 {
816 struct lbs_private *priv = (struct lbs_private *)data;
817
818 lbs_deb_enter(LBS_DEB_CMD);
819
820 if (priv->is_activity_detected) {
821 priv->is_activity_detected = 0;
822 } else {
823 if (priv->is_auto_deep_sleep_enabled &&
824 (!priv->wakeup_dev_required) &&
825 (priv->connect_status != LBS_CONNECTED)) {
826 struct cmd_header cmd;
827
828 lbs_deb_main("Entering auto deep sleep mode...\n");
829 memset(&cmd, 0, sizeof(cmd));
830 cmd.size = cpu_to_le16(sizeof(cmd));
831 lbs_cmd_async(priv, CMD_802_11_DEEP_SLEEP, &cmd,
832 sizeof(cmd));
833 }
834 }
835 mod_timer(&priv->auto_deepsleep_timer , jiffies +
836 (priv->auto_deep_sleep_timeout * HZ)/1000);
837 lbs_deb_leave(LBS_DEB_CMD);
838 }
839
840 int lbs_enter_auto_deep_sleep(struct lbs_private *priv)
841 {
842 lbs_deb_enter(LBS_DEB_SDIO);
843
844 priv->is_auto_deep_sleep_enabled = 1;
845 if (priv->is_deep_sleep)
846 priv->wakeup_dev_required = 1;
847 mod_timer(&priv->auto_deepsleep_timer ,
848 jiffies + (priv->auto_deep_sleep_timeout * HZ)/1000);
849
850 lbs_deb_leave(LBS_DEB_SDIO);
851 return 0;
852 }
853
854 int lbs_exit_auto_deep_sleep(struct lbs_private *priv)
855 {
856 lbs_deb_enter(LBS_DEB_SDIO);
857
858 priv->is_auto_deep_sleep_enabled = 0;
859 priv->auto_deep_sleep_timeout = 0;
860 del_timer(&priv->auto_deepsleep_timer);
861
862 lbs_deb_leave(LBS_DEB_SDIO);
863 return 0;
864 }
865
866 static int lbs_init_adapter(struct lbs_private *priv)
867 {
868 int ret;
869
870 lbs_deb_enter(LBS_DEB_MAIN);
871
872 memset(priv->current_addr, 0xff, ETH_ALEN);
873
874 priv->connect_status = LBS_DISCONNECTED;
875 priv->channel = DEFAULT_AD_HOC_CHANNEL;
876 priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
877 priv->radio_on = 1;
878 priv->psmode = LBS802_11POWERMODECAM;
879 priv->psstate = PS_STATE_FULL_POWER;
880 priv->is_deep_sleep = 0;
881 priv->is_auto_deep_sleep_enabled = 0;
882 priv->deep_sleep_required = 0;
883 priv->wakeup_dev_required = 0;
884 init_waitqueue_head(&priv->ds_awake_q);
885 init_waitqueue_head(&priv->scan_q);
886 priv->authtype_auto = 1;
887 priv->is_host_sleep_configured = 0;
888 priv->is_host_sleep_activated = 0;
889 init_waitqueue_head(&priv->host_sleep_q);
890 init_waitqueue_head(&priv->fw_waitq);
891 mutex_init(&priv->lock);
892
893 setup_timer(&priv->command_timer, lbs_cmd_timeout_handler,
894 (unsigned long)priv);
895 setup_timer(&priv->tx_lockup_timer, lbs_tx_lockup_handler,
896 (unsigned long)priv);
897 setup_timer(&priv->auto_deepsleep_timer, auto_deepsleep_timer_fn,
898 (unsigned long)priv);
899
900 INIT_LIST_HEAD(&priv->cmdfreeq);
901 INIT_LIST_HEAD(&priv->cmdpendingq);
902
903 spin_lock_init(&priv->driver_lock);
904
905 /* Allocate the command buffers */
906 if (lbs_allocate_cmd_buffer(priv)) {
907 pr_err("Out of memory allocating command buffers\n");
908 ret = -ENOMEM;
909 goto out;
910 }
911 priv->resp_idx = 0;
912 priv->resp_len[0] = priv->resp_len[1] = 0;
913
914 /* Create the event FIFO */
915 ret = kfifo_alloc(&priv->event_fifo, sizeof(u32) * 16, GFP_KERNEL);
916 if (ret) {
917 pr_err("Out of memory allocating event FIFO buffer\n");
918 goto out;
919 }
920
921 out:
922 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
923
924 return ret;
925 }
926
927 static void lbs_free_adapter(struct lbs_private *priv)
928 {
929 lbs_deb_enter(LBS_DEB_MAIN);
930
931 lbs_free_cmd_buffer(priv);
932 kfifo_free(&priv->event_fifo);
933 del_timer(&priv->command_timer);
934 del_timer(&priv->tx_lockup_timer);
935 del_timer(&priv->auto_deepsleep_timer);
936
937 lbs_deb_leave(LBS_DEB_MAIN);
938 }
939
940 static const struct net_device_ops lbs_netdev_ops = {
941 .ndo_open = lbs_dev_open,
942 .ndo_stop = lbs_eth_stop,
943 .ndo_start_xmit = lbs_hard_start_xmit,
944 .ndo_set_mac_address = lbs_set_mac_address,
945 .ndo_set_rx_mode = lbs_set_multicast_list,
946 .ndo_change_mtu = eth_change_mtu,
947 .ndo_validate_addr = eth_validate_addr,
948 };
949
950 /**
951 * lbs_add_card - adds the card. It will probe the
952 * card, allocate the lbs_priv and initialize the device.
953 *
954 * @card: A pointer to card
955 * @dmdev: A pointer to &struct device
956 * returns: A pointer to &struct lbs_private structure
957 */
958 struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
959 {
960 struct net_device *dev;
961 struct wireless_dev *wdev;
962 struct lbs_private *priv = NULL;
963
964 lbs_deb_enter(LBS_DEB_MAIN);
965
966 /* Allocate an Ethernet device and register it */
967 wdev = lbs_cfg_alloc(dmdev);
968 if (IS_ERR(wdev)) {
969 pr_err("cfg80211 init failed\n");
970 goto done;
971 }
972
973 wdev->iftype = NL80211_IFTYPE_STATION;
974 priv = wdev_priv(wdev);
975 priv->wdev = wdev;
976
977 if (lbs_init_adapter(priv)) {
978 pr_err("failed to initialize adapter structure\n");
979 goto err_wdev;
980 }
981
982 dev = alloc_netdev(0, "wlan%d", ether_setup);
983 if (!dev) {
984 dev_err(dmdev, "no memory for network device instance\n");
985 goto err_adapter;
986 }
987
988 dev->ieee80211_ptr = wdev;
989 dev->ml_priv = priv;
990 SET_NETDEV_DEV(dev, dmdev);
991 wdev->netdev = dev;
992 priv->dev = dev;
993
994 dev->netdev_ops = &lbs_netdev_ops;
995 dev->watchdog_timeo = 5 * HZ;
996 dev->ethtool_ops = &lbs_ethtool_ops;
997 dev->flags |= IFF_BROADCAST | IFF_MULTICAST;
998
999 priv->card = card;
1000
1001 strcpy(dev->name, "wlan%d");
1002
1003 lbs_deb_thread("Starting main thread...\n");
1004 init_waitqueue_head(&priv->waitq);
1005 priv->main_thread = kthread_run(lbs_thread, dev, "lbs_main");
1006 if (IS_ERR(priv->main_thread)) {
1007 lbs_deb_thread("Error creating main thread.\n");
1008 goto err_ndev;
1009 }
1010
1011 priv->work_thread = create_singlethread_workqueue("lbs_worker");
1012 INIT_WORK(&priv->mcast_work, lbs_set_mcast_worker);
1013
1014 priv->wol_criteria = EHS_REMOVE_WAKEUP;
1015 priv->wol_gpio = 0xff;
1016 priv->wol_gap = 20;
1017 priv->ehs_remove_supported = true;
1018
1019 goto done;
1020
1021 err_ndev:
1022 free_netdev(dev);
1023
1024 err_adapter:
1025 lbs_free_adapter(priv);
1026
1027 err_wdev:
1028 lbs_cfg_free(priv);
1029
1030 priv = NULL;
1031
1032 done:
1033 lbs_deb_leave_args(LBS_DEB_MAIN, "priv %p", priv);
1034 return priv;
1035 }
1036 EXPORT_SYMBOL_GPL(lbs_add_card);
1037
1038
1039 void lbs_remove_card(struct lbs_private *priv)
1040 {
1041 struct net_device *dev = priv->dev;
1042
1043 lbs_deb_enter(LBS_DEB_MAIN);
1044
1045 lbs_remove_mesh(priv);
1046
1047 if (priv->wiphy_registered)
1048 lbs_scan_deinit(priv);
1049
1050 lbs_wait_for_firmware_load(priv);
1051
1052 /* worker thread destruction blocks on the in-flight command which
1053 * should have been cleared already in lbs_stop_card().
1054 */
1055 lbs_deb_main("destroying worker thread\n");
1056 destroy_workqueue(priv->work_thread);
1057 lbs_deb_main("done destroying worker thread\n");
1058
1059 if (priv->psmode == LBS802_11POWERMODEMAX_PSP) {
1060 priv->psmode = LBS802_11POWERMODECAM;
1061 lbs_set_ps_mode(priv, PS_MODE_ACTION_EXIT_PS, true);
1062 }
1063
1064 if (priv->is_deep_sleep) {
1065 priv->is_deep_sleep = 0;
1066 wake_up_interruptible(&priv->ds_awake_q);
1067 }
1068
1069 priv->is_host_sleep_configured = 0;
1070 priv->is_host_sleep_activated = 0;
1071 wake_up_interruptible(&priv->host_sleep_q);
1072
1073 /* Stop the thread servicing the interrupts */
1074 priv->surpriseremoved = 1;
1075 kthread_stop(priv->main_thread);
1076
1077 lbs_free_adapter(priv);
1078 lbs_cfg_free(priv);
1079 free_netdev(dev);
1080
1081 lbs_deb_leave(LBS_DEB_MAIN);
1082 }
1083 EXPORT_SYMBOL_GPL(lbs_remove_card);
1084
1085
1086 int lbs_rtap_supported(struct lbs_private *priv)
1087 {
1088 if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V5)
1089 return 1;
1090
1091 /* newer firmware use a capability mask */
1092 return ((MRVL_FW_MAJOR_REV(priv->fwrelease) >= MRVL_FW_V10) &&
1093 (priv->fwcapinfo & MESH_CAPINFO_ENABLE_MASK));
1094 }
1095
1096
1097 int lbs_start_card(struct lbs_private *priv)
1098 {
1099 struct net_device *dev = priv->dev;
1100 int ret = -1;
1101
1102 lbs_deb_enter(LBS_DEB_MAIN);
1103
1104 /* poke the firmware */
1105 ret = lbs_setup_firmware(priv);
1106 if (ret)
1107 goto done;
1108
1109 if (!lbs_disablemesh)
1110 lbs_init_mesh(priv);
1111 else
1112 pr_info("%s: mesh disabled\n", dev->name);
1113
1114 if (lbs_cfg_register(priv)) {
1115 pr_err("cannot register device\n");
1116 goto done;
1117 }
1118
1119 if (lbs_mesh_activated(priv))
1120 lbs_start_mesh(priv);
1121
1122 lbs_debugfs_init_one(priv, dev);
1123
1124 netdev_info(dev, "Marvell WLAN 802.11 adapter\n");
1125
1126 ret = 0;
1127
1128 done:
1129 lbs_deb_leave_args(LBS_DEB_MAIN, "ret %d", ret);
1130 return ret;
1131 }
1132 EXPORT_SYMBOL_GPL(lbs_start_card);
1133
1134
1135 void lbs_stop_card(struct lbs_private *priv)
1136 {
1137 struct net_device *dev;
1138
1139 lbs_deb_enter(LBS_DEB_MAIN);
1140
1141 if (!priv)
1142 goto out;
1143 dev = priv->dev;
1144
1145 /* If the netdev isn't registered, it means that lbs_start_card() was
1146 * never called so we have nothing to do here. */
1147 if (dev->reg_state != NETREG_REGISTERED)
1148 goto out;
1149
1150 netif_stop_queue(dev);
1151 netif_carrier_off(dev);
1152
1153 lbs_debugfs_remove_one(priv);
1154 lbs_deinit_mesh(priv);
1155 unregister_netdev(dev);
1156
1157 out:
1158 lbs_deb_leave(LBS_DEB_MAIN);
1159 }
1160 EXPORT_SYMBOL_GPL(lbs_stop_card);
1161
1162
1163 void lbs_queue_event(struct lbs_private *priv, u32 event)
1164 {
1165 unsigned long flags;
1166
1167 lbs_deb_enter(LBS_DEB_THREAD);
1168 spin_lock_irqsave(&priv->driver_lock, flags);
1169
1170 if (priv->psstate == PS_STATE_SLEEP)
1171 priv->psstate = PS_STATE_AWAKE;
1172
1173 kfifo_in(&priv->event_fifo, (unsigned char *) &event, sizeof(u32));
1174
1175 wake_up(&priv->waitq);
1176
1177 spin_unlock_irqrestore(&priv->driver_lock, flags);
1178 lbs_deb_leave(LBS_DEB_THREAD);
1179 }
1180 EXPORT_SYMBOL_GPL(lbs_queue_event);
1181
1182 void lbs_notify_command_response(struct lbs_private *priv, u8 resp_idx)
1183 {
1184 lbs_deb_enter(LBS_DEB_THREAD);
1185
1186 if (priv->psstate == PS_STATE_SLEEP)
1187 priv->psstate = PS_STATE_AWAKE;
1188
1189 /* Swap buffers by flipping the response index */
1190 BUG_ON(resp_idx > 1);
1191 priv->resp_idx = resp_idx;
1192
1193 wake_up(&priv->waitq);
1194
1195 lbs_deb_leave(LBS_DEB_THREAD);
1196 }
1197 EXPORT_SYMBOL_GPL(lbs_notify_command_response);
1198
1199 static int __init lbs_init_module(void)
1200 {
1201 lbs_deb_enter(LBS_DEB_MAIN);
1202 memset(&confirm_sleep, 0, sizeof(confirm_sleep));
1203 confirm_sleep.hdr.command = cpu_to_le16(CMD_802_11_PS_MODE);
1204 confirm_sleep.hdr.size = cpu_to_le16(sizeof(confirm_sleep));
1205 confirm_sleep.action = cpu_to_le16(PS_MODE_ACTION_SLEEP_CONFIRMED);
1206 lbs_debugfs_init();
1207 lbs_deb_leave(LBS_DEB_MAIN);
1208 return 0;
1209 }
1210
1211 static void __exit lbs_exit_module(void)
1212 {
1213 lbs_deb_enter(LBS_DEB_MAIN);
1214 lbs_debugfs_remove();
1215 lbs_deb_leave(LBS_DEB_MAIN);
1216 }
1217
1218 module_init(lbs_init_module);
1219 module_exit(lbs_exit_module);
1220
1221 MODULE_DESCRIPTION("Libertas WLAN Driver Library");
1222 MODULE_AUTHOR("Marvell International Ltd.");
1223 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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